Inside the Ultra Forced Air

Engineering Specifications
Ultra Forced Air
EV 17 thru 47
Inside the Ultra Forced Air
Installation &
Operating Instructions
Ultra Vertical Unit
Intelligent
5/10 kW
Electric
Elements
(Optional)
Air Filter
Air Coil
Blower
Transformer
Contactor
Controller
Thermostatic
Expansion
Valve
Reversing
Valve
Low Pressure
Switch
Double-Wall Vented
Desuperheater and Pump
(Optional)
Scroll
Compressor
High Pressure
Switch
Air Pad
Legend for Tables
BTU/hr
CAP
COP
CFM
DB
DHW
DWR
dP
EER
EWT
FLA
GND
GPM
Heating or cooling capacity
Capacity
Coefficient of performance (BTU/hr out  BTU/hr in)
Cubic feet per minute
Dry-bulb entering air temperature
Domestic hot water
Domestic hot water, extra capacity
Pressure drop across heat pump (in feet of water and psi)
Energy efficiency ratio (BTU/hr CAP  watts in)
Entering water temperature (in degrees Fahrenheit)
Full-load amperage
Ground
Gallons per minute of water flow
HE
HR
HYD
KW
LRA
MBTU/hr
RLA
SR
SUP
VA
WB
Heat extracted
Heat rejected
Hydronic
Kilowatt input
Locked-rotor amperage
Btu/hr X 1000
Rated-load amperage
Sensible Ratio (sensible cooling capacity 
total cooling capacity)
Supplemental domestic water heating
Volt-amperes
Wet-bulb entering air temperature
All Pressure Drop Ratings are for Pure Water.
See last page for Correction Factors.
Performance values are +/- 10%, and are subject to change without notice
Key to Model Numbers
EV470–1–UOOO
CABINET STYLE
V = Vertical (Forced Air)
H = Horizontal (Forced Air)
W = Water (Hydronic)
D = Domestic (Hot Water)
WATER COIL
O = Standard
N = Cupro Nickel Well Water Coil
P = Cupro Nickel Hydronic Coil
V = Cupro Nickel Well Water and
Hydronic Coil
NOMINAL COOLING CAPACITY
X 1,000 BTU/hr
UNIT TYPE
O = Standard
V = Variable Speed ECM Blower
D = Demonstrator
H = Heat only (Hydronic)
S = Special
T = Staged Tandems
U = Staged Tandems Heat Only
M = Modulating Valve
B = Variable Speed ECM Blower with
Modulating Valve
2 = Two-Step Compressor
C = Commercial
DESUPERHEATER OPTION
0 = None
1 = Part Time, 65% DHW
ELECTRICAL SUPPLY OPTION
1 = 208/230V-60Hz, Single Phase
2 = 208/230V-60Hz, Three Phase
3 = 460V-60Hz, Three Phase
4 = 220V-50Hz, Single Phase
5 = 277V-60Hz, Single Phase
6 = 208/230-60Hz, Single Phase w/ EMS
7 = 208/230-60Hz, Three Phase w/ EMS
8 = 460-60Hz, Three Phase w/ EMS
9 = 380V-60Hz, Three Phase
A = 200/220V-50/60Hz, Three Phase
B = 380V-50Hz, Three Phase
C = 575V-60Hz, Three Phase
AIR OPTION
O = Standard
R = Right Return Vertical
B = Bottom Discharge Right Return Vertical
C = Front Right Discharge Horizontal
S = Split System
DESIGN
D = DualTEK
V = Vara, Vara 2 Plus
U = Ultra
3
TABLE OF CONTENTS
Section
Title
Page
I.
Introduction to ECONAR Heat Pumps
2
II.
Unit Sizing
A. Building Heat Loss / Heat Gain
B. Ground Sources & Design Water Temperatures
1. Ground Loop Applications
2. Ground Water Applications
C. Temperature Limitations
3
III.
Unit Location / Mounting
4
IV.
Condensate Drain
4
V.
Duct System / Blower
5
VI.
Ground Source Design
A. Ground Loop Installation
B. Ground Water Installation
1. Ground Water Freeze Protection Switch
2. Water Coil Maintenance
6
VII.
Electrical Service
8
VIII.
24 Volt Control Circuit
A. Transformer
B. Thermostat
C. Controller
9
IX.
Startup / Checkout
11
X.
Service and Lockout Lights
A. Lockout Lights
B. Air Filter
C. Preseason Inspection
D. Ground Water Heat Exchanger
12
XI.
Room Thermostat Operation
12
XII.
Desuperheater (Optional)
12
XIII.
XIV.
XV.
XVI.
XVII.
XVIII.
XIX.
XX.
Performance Ratings & Configuration options
Performance Data
Fan Performance Data
Physical Data
Dimensions & Electrical Data
Correction Factors & Pressure Drop
Wiring Diagrams
Troubleshooting Guide for Lockout Conditions
14
15
18
18
19
20
21
23
XXI.
Troubleshooting Guide for Unit Operation
24
XXII.
Troubleshooting Guide for ECM Blower
26
XXIII.
Additional Figures
27
1
I. INTRODUCTION TO ECONAR
HEAT PUMPS
Enertech Global, LLC, is home to ECONAR geothermal
heat pumps, a brand that has been in Minnesota for over
twenty years. The cold winter climate has driven the
design of ECONAR’s heating and cooling equipment to
what is known as a "ColdClimate" geothermal heat pump.
This cold climate technology focuses on maximizing the
energy savings available in heating dominated regions
without sacrificing comfort. Extremely efficient heating,
cooling, dehumidification and optional domestic hot
water heating are provided in one neatly packaged
system.
Enertech produces three types of ECONAR heat pumps:
hydronic, which transfers energy from water to water;
forced air, which transfers energy from water to air; and
combination, which incorporates the hydronic heating
unit into a forced air unit. Geothermal heat pumps get
their name from the transfer of energy to and from the
ground. The ground-coupled heat exchanger (geothermal
loop) supplies the source energy for heating and absorbs
the discharged energy from cooling. The system uses a
compression cycle, much like your refrigerator, to collect
the ground’s energy supplied by the sun and uses it to
heat your home. Since the process only moves energy,
and does not create it, the efficiencies are three to four
times higher than most efficient fossil fuel systems.
Safety and comfort are designed into every ECONAR
geothermal heat pump. Since the system runs completely
on electrical energy, the entire home can have the safety
of being gas-free. The best engineering and quality
control is in every heat pump. Proper application and
correct installation will ensure excellent performance and
customer satisfaction. The Enertech commitment to
quality is written on the side of every heat pump built.
Throughout the manufacturing process, the technicians
who assemble each unit sign their names to the quality
assurance label after completing their inspections. As a
final quality test, every unit goes through a full run-test
where the performance and operation is verified in both
the heating and cooling modes. No other manufacturer
goes as far as to run a full performance check to ensure
system quality.
This guide discusses Ultra forced air units. The Ultra
uses R-410A refrigerant, which is environmentally
friendly to the earth’s protective ozone layer.
WARNING – Service of refrigerant-based equipment
can be hazardous due to elevated system pressures and
hazardous voltages. Only trained and qualified personnel
should install, repair or service. The installer is
responsible to ensure that all local electrical, plumbing,
heating and air conditioning codes are followed.
WARNING – ELECTRICAL SHOCK CAN CAUSE
PERSONAL INJURY OR DEATH. Disconnect all
power supplies before installing or servicing electrical
devices. Only trained and qualified personnel should
install, repair or service this equipment.
WARNING –Verify refrigerant type before servicing.
The nameplate on the heat pump identifies the type and
the amount of refrigerant. All refrigerant removed from
these units must be reclaimed by following accepted
industry and agency procedures.
CAUTION – Ground loops must be freeze protected.
Insufficient amounts of antifreeze may cause severe
damage and may void warranty. Never operate with
ground loop flow rates less than specified. Continuous
operation at low flow rates, or no flow, may cause severe
damage and may void warranty.
CAUTION – R410A refrigerant requires extra
precaution when service work is being performed. The
operating pressures are approximately 150% higher than
R-22 – which can cause personal injury. Invasion into
the refrigerant system must be a last resort. Ensure all
other diagnosis and methods have been used before
attaching refrigerant instruments and before opening the
refrigerant system. Synthetic oil (POE) is extremely
hydroscopic, meaning it has a strong chemical attraction
to moisture. Brief exposure to ambient air could cause
POE to absorb enough moisture that a typical vacuum
may not remove.
COMMON ACRONYMS
CFM
DHW
dP
EAT
ECM
EWT
GPM/gpm
Ground Loop
Ground Water
GTF
HP
kW
LP
P/T
PSC
VA
Cubic Feet per Minute
Domestic Hot Water
Pressure Differential
Entering Air Temperature
Electronically Commutated Motor
Entering Water Temperature
Gallons per Minute
Also known as Closed Loop
Also known as Open Loop
GeoThermal Transfer Fluid
High Pressure
Kilowatts
Low Pressure
Pressure/Temperature
Permanent Split Capacitor
Volt Amperes
II. UNIT SIZING
Selecting the unit capacity of a forced air geothermal heat
pump requires three things:
A) Building Heat Loss/Heat Gain.
B) Ground Sources and Design Water Temperatures.
C) Temperature Limitations.
A. Building Heat Loss/Heat Gain
The space load must be estimated accurately for any
successful HVAC installation. There are many guides or
computer programs available for estimating heat loss and
gain, including the Enertech Geothermal Heat Pump
Handbook, Manual J, and others. After the heat loss and
gain analysis is completed, Entering Water Temperatures
2
(EWT’s) are established, and the heat pump can now be
selected using forced air heat pump data in the
Engineering Specifications. Choose the capacity of the
heat pump based on both heating and cooling loads.
B. Ground-Sources and Design Water
Temperatures
Ground sources include the Ground Water (typically a
well) and the Ground Loop varieties. Water flow-rate
requirements vary based on configuration. ECONAR
Engineering Specifications provide capacities at different
loop water temperatures. Note: Table 1 shows the waterflow (GPM) requirements and water-flow pressure
differential (dP) for the heat exchanger, and Table 2
shows the dP multiplier for various levels of freeze
protection.
Table 1 – Ground-Side Flow Rate Requirements
o
Ground Loop
50 F Ground Water
Flow
dP*
Flow
dP*
(gpm)
(psig)
(gpm)
(psig)
5
2.2
3
0.9
17 Series
8
2.8
5
2.2
27 Series
9
3.1
6
1.6
37 Series
12
5.3
7
2.4
47 Series
* dP (psig) heat exchanger pressure drops are for pure water.
Note: dP values are for standard heat exchanger configurations. Cupro
Nickel heat exchanger configurations for Ground Water applications
have higher dP.
Model
Table 2 – Heat Exchanger Pressure Differential (dP)
Correction Factors for Freeze Protection (Typical)
AntiFreeze
(1)
Percent
Volume
Freeze
Level
dP Multiplier
25oF
35oF
90oF
110oF
o
GTF
50% GTF
12 F
125% 123% N/a
N/a
Propylene
20%
18oF
136% 133% 118% 114%
Glycol
25%
15oF
145% 142% N/a
N/a
(1)
GTF = Geothermal Transfer Fluid. 60% water, 40% methanol.
1. Ground Loop Systems
Loop systems use a high density polyethylene pipe buried
underground to supply a tempered water solution back to
the heat pump. Ground loops operate at higher flow rates
than ground water systems because the entering water
temperature (EWT) is lower. EWT affects the capacity of
the unit in the heating mode, and loops in cold climates
are normally sized to supply a wintertime EWT to the
heat pump down to 25oF.
When selecting the heat pump, choose a unit that will
supply the necessary heating or cooling capacity at the
minimum and maximum ground loop EWT conditions
respectively. Example; if a residential system requires
45,000 Btu/hr to heat a house on an earth loop system
(designed for 32oF minimum winter EWT), and 40,000
Btu/hr to cool the house on an earth loop (designed for
77oF summer EWT), an EV47 Ultra heat pump is
required.
2. Ground Water Systems
Note: If a heat pump is installed with ground water, it
should have a Cupro-Nickel water coil (EVxxx-x-UxxN).
Cupro-Nickel coils withstand well water much better than
standard water coils.
The design water temperature will be the well water
temperature in your geographic region for ground water
systems. Typical well water temperatures are in the 50 oF
range in many cold climates. If well water temperatures
are lower than 50oF (Canadian well water can be as low as
40oF) the flow rate must be increased to avoid leaving
water temperatures below the freezing point. If well water
temperatures are above 50oF (Some southern states are
above 70oF) the flow rates may need to be increased to
dump heat more efficiently in the cooling mode.
Varying well water temperatures will have little effect on
unit capacity in the cooling mode (since the well is
connected to the heat pump condenser), but can have
large effects on capacity in the heating mode (since the
well is connected to the evaporator). If well water
temperatures exceed 70oF, special considerations, such as
ground loop systems, should be considered.
C. Temperature Limitations
Be aware of the operating range of the geothermal system
when sizing the particular heat pump to avoid premature
equipment failure. Operating outside of these limitations
may cause severe damage to the equipment and may void
warranty.
CAUTIONS;
–The acceptable Ground Loop EWT is 15oF to 70oF for
heating and 40oF to 95oF for cooling.
–The acceptable Ground Water EWT is 45 oF minimum in
heating and 70oF maximum in cooling.
III. UNIT LOCATION / MOUNTING
CAUTION – Units must be kept in an upright position
during transportation and installation, or severe internal
damage may occur. Bottom Discharge units are very “top
heavy.”
Important – To ensure easy removal and replacement
of access panels, leave panels secured in place until the
unit is set in place and leveled.
Important – Locate the unit in an indoor area where
the ambient temperature will remain above 45 oF. Service
is done primarily from the front. Top and rear access is
desirable and should be provided when possible.
Important – A field installed drain pan is required
under the entire unit where accidental water discharge
could damage surrounding floors, walls or ceilings.
CAUTION – Do not use this unit during construction.
Dust and debris may quickly contaminate electrical and
mechanical components; resulting in damage.
CAUTION - Before driving screws into the cabinet,
check on the inside of the unit to ensure the screw will not
3
damage electrical, water, or refrigeration lines.
Important – Units must be mounted on a vibrationabsorbing pad slightly larger than the base to provide
isolation between the unit and the floor. Water supply
pumps should not be hard plumbed directly to the unit
with copper pipe; this could transfer vibration from the
water pump to the refrigeration circuit, causing a
resonating sound. Hard plumbing must be isolated from
building structures that could also transfer vibration noise
from the unit through the piping to the living space.
CAUTION – Always use plastic male fittings into
plastic female or into metal female fittings. Never use
metal male fittings into plastic female fittings. On metalto-metal fittings, use pipe thread compound, do not use
pipe thread tape, hand tighten first, and then only tighten
an additional ½ turn with a tool if necessary. On plastic
fittings, always use 2 to 3 wraps of pipe thread tape, do
not use pipe thread compound, hand tighten first, and then
only tighten an additional ½ turn with a tool if necessary.
Do not over-tighten, or damage may occur.
IV. CONDENSATE DRAIN
Condensate traps are built into every Ultra Vertical Top
Discharge unit, so an external trap should not be installed.
Important – All Horizontal and Vertical units must be
installed level to ensure proper condensate drainage.
CAUTION – Horizontal units have a ¾” FPT drain and
require an external ¾” condensate vented trap in order to
drain water from the heat pump.
CAUTION – Bottom Discharge (downflow) units have
two ½” MPT drains; one for the condensate, and one for
the cabinet. Each drain requires a separate external ¾”
condensate-vented trap, and the unit must be elevated
enough to provide clearance for the drain traps.
The line leaving the U bend of the condensate trap must
be at least 3” below the base of the heat pump. This
requires the U bend to be 6” below the unit to give the
upward portion of the U bend a 3” lift (see Figure 1). The
trap should be vented after the U bend. The line should be
pitched away from the unit a minimum of 1/8” per foot. If
the unit produces an odor in the cooling mode, the
condensate trap or line may be plugged, or the unit may
not be pitched correctly. Bleach may be poured down the
condensate drain in the heat pump to kill any bacterial
growth in the condensate line. Vented condensate traps
are necessary to break the negative pressure in the air
chamber and allow the condensate to flow. Construct
condensate traps to the following diagram.
Heat Pump
Base
Heat Pump
Base
Air Vent
6" drop
minimum
3" Rise
To drain
with 1/8"
per foot
minimum
pitch
Horizontal Units
V. DUCT SYSTEM/BLOWER
Metal ductwork should be used, and flexible connectors
are required for discharge and return air duct connections.
An air inlet collar is provided on all Ultra® forced air
units to connect the return duct. For acceptable duct sizes,
see Table 3. If the duct is installed in an uninsulated
space, it should be insulated on the outside to prevent heat
loss, absorb noise, and prevent condensation from
collecting on the ductwork.
Important – If the unit is connected to existing
ductwork, the existing ductwork must have the capacity to
handle the air volume required by the heat pump.
Undersized ductwork will cause noisy operation due to
high air velocity, poor operating efficiencies, and
nuisance high, or low, pressure lockouts.
The Ultra heat pump is standard with a 230 Volt threespeed Permanent Split Capacitor (PSC) blower motor.
The motor can be set at three adjustment settings low,
medium, or high at the fan terminal strip, located in the
electrical box. The GH87 and GH110 have dual blowers.
Refer to Table 4 for factory settings and CFM outputs.
The EV/H37-77 series is also available with an optional
variable speed Electronically Commutated Motor (ECM)
blower motor. The ECM motor converts 230 Volt AC to
internal DC power and then modulates the DC power to
turn the motor at various speeds. There are four different
CFM outputs in each of the three blower speed ranges
(Low, Medium, and High). Refer to Table 4 for factory
settings and CFM outputs. Important – The blower
will not operate properly if ductwork is not attached.
Ductwork supplies static pressure for the blower motor to
work against. The blower compartment access door must
be on for the unit to run properly. Blower motors may
overheat if run for extended periods of time without a
load. Note – If problems occur, refer to the ECM Motor
Troubleshooting Guide at the rear of this manual
Air Vent
6" drop
minimum
3" Rise
Bottom Discharge
Figure 1 – Condensate Drain - Horizontal and Bottom
Discharge Units Only
4
Table 3 - Duct Sizing Chart
CFM
100
150
200
250
300
350
400
450
500
600
800
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
3000
3200
Acceptable Branch Duct Sizes
Round
Rectangular
6”
4x8, 4x6
7”
4x10, 5x8, 6x6
8”
5x10, 6x8, 4x14, 7x7
9”
6x10, 8x8, 4x16
10”
6x14, 8x10, 7x12
10”
6x20, 6x16, 9x10
12”
6x18, 10x10, 9x12
12”
6x20, 8x14, 9x12, 10x11
Acceptable Main or Trunk Duct Sizes
Round
Rectangular
10”
10”
10”
12”
12”
14”
16”
16”
18”
20”
20”
22”
22”
22”
22”
24”
24”
4x20, 7x10, 6x12, 8x9
5x20, 6x16, 9x10, 8x12
10x10, 6x18, 8x12, 7x14
6x20, 7x18, 8x16, 10x12
8x18, 9x15, 10x14, 12x12
10x18, 12x14, 8x24
10x20, 12x18, 14x15
10x25, 12x20, 14x18, 15x16
10x30, 15x18, 14x20
10x35, 15x20, 16x19, 12x30, 14x25
10x40, 12x30, 15x25, 18x20
10x40, 15x25, 20x20
12x40, 16x25, 20x20
14x28, 15x25, 16x24, 20x20
14x30, 15x28, 16x25, 20x20
14x33, 15x30, 16x28, 20x22
16x30, 20x26
Tables calculated for 0.05 to 0.10 inches of water friction per 100’ of duct. At these duct design conditions, along with the pressure
drop through the filter, the total design external static pressure is 0.20 inches of water.
Table 4 – PSC Fan Performance & Settings
External Static Pressure – in WG
Model
Fan
Speed
17x-x-Uxxx Series
Low
Medium
High*
27x-x-Uxxx Series
Low
Medium*
High
37x-x-Uxxx Series
47x-x-Uxxx Series
Low
Medium*
High
Low
Medium
High*
0.10
550
610
675
870
980
1090
1005
1140
1210
0.15
520
580
650
825
935
1050
965
1100
1150
0.20
490
550
625
800
900
1000
935
1065
1110
0.25
460
430
600
775
870
965
890
1010
1070
0.30
445
510
580
750
845
940
855
965
1030
1325
1505
1685
1275
1450
1625
1235
1415
1550
1200
1375
1500
1165
1320
1435
*denotes factory setting.
.
Table 5 – ECM Blower Speed Settings
Model
37x-x-UxVx Series
47x-x-UxVx Series
TAP
D
C
Low (G)
485
680
Medium(Y)
1100
1550
High (W/E)
1210
1705
Note: Adjust Tap set to “+” will increase these numbers by 10%.
Adjust Tap set to “-” will decrease these numbers by 10%.
5
VI. GROUND SOURCE DESIGN
Since water is the source of energy in the winter and the
energy sink in the summer, a good water supply is
possibly the most important requirement of a geothermal
heat pump system installation.
A. Ground Loop Installation
A ground loop system circulates the same antifreeze
solution through a closed system of high-density
underground polyethylene pipe. As the solution passes
through the pipe, it collects energy (in the heating mode)
from the relatively warm surrounding soil through the
pipe and into the relatively cold solution. The solution
circulates to the heat pump, which transfers energy with
the solution, and then the solution circulates back through
the ground to extract more energy.
The Ultra is designed to operate on either vertical or
horizontal ground loop applications. Vertical loops are
typically installed with a well drilling rig up to 200 feet
deep, or more. Horizontal loops are installed with
excavating or trenching equipment to a depth of about six
to eight feet deep, depending on geographic location and
length of pipe used. Loops must be sized properly for
each particular geographic area, soil type, and individual
capacity requirements. Contact Enertech Customer
Support or the local installer for loop sizing requirements
in your area.
Typical winter operating EWT to the heat pump ranges
from 25oF to 32oF.
CAUTION – Ground Loops must be properly freeze
protected. Insufficient amounts of antifreeze may result in
a freeze rupture of the unit or can cause unit shutdown
problems during cold weather operation. Propylene glycol
and Geothermal Transfer Fluid (GTF) are common
antifreeze solutions. GTF is methanol-based antifreeze
and should be mixed 50% with water to achieve freeze
protection of 12oF. Propylene glycol antifreeze solution
should be mixed 25% with water to obtain a 15 oF freeze
protection.
Important – Do not mix more than 25% propylene
glycol with water in an attempt to achieve a lower than
15oF freeze protection, since more concentrated mixtures
of propylene glycol become too viscous at low
temperatures and cannot be pumped through the earth
loop. Horizontal loops typically use GTF, and vertical
loops typically use propylene glycol. Note – Always
check state and local codes for any special requirements
on antifreeze solutions.
Flow rate requirements for ground loops are higher (see
Table 1) than ground water systems because water
temperatures are generally lower.
CAUTION – Never operate with flow rates less than
specified. Low flow rates, or no flow, may cause the unit
to shut down on a pressure lockout or may cause a freeze
rupture of the heat exchanger.
Important – Figure 4 shows that Pressure/Temperature
(P/T) ports must be installed in the entering and leaving
water lines of the heat pump. A thermometer can be
inserted into the P/T ports to check entering and leaving
water temperatures. A pressure gauge can also be inserted
into these P/T ports to determine the pressure differential
between the entering and leaving water. This pressure
differential can then be compared to the specification data
on each particular heat pump to confirm the proper flow
rate of the system.
An individually-sized Enertech flow center can supply
pumping requirements for the Ground Loop fluid, and can
also be used to purge the loop system. Note – Refer to
instructions included with the flow center for properly
purging the ground loop.
Important – the pump must be installed to supply fluid
into the heat pump.
Filling and purging a loop system are very important steps
to ensure proper heat pump operation. Each loop must be
purged with enough water flow to ensure a two feet per
second flow rate in each circuit on the loop. This
normally requires a 1½ to 3 HP high head pump to
circulate fluid through the loop to remove all the air out of
the loop and into a purging tank. Allow the pump to run
10 to 15 minutes after the last air bubbles have been
removed. After purging is completed, add the calculated
proper amount of antifreeze to give a 12 oF to 15oF freeze
protection. After antifreeze has been installed and
thoroughly circulated, it should be measured with a
hydrometer, refractometer or any other suitable device to
determine the actual freezing point of the solution.
The purge pump can be used to pressurize the system for
a final static pressure of 30-40 psig after the loop pipe has
had enough time to stretch. In order to achieve the 30 to
40 psig final pressure, the loop may need to be initially
pressurized to 60-65 psig. This static pressure may vary
10 psig from heating to cooling season, but the pressure
should always remain above 20 psig, so circulation pumps
do not cavitate or pull air into the system. Contact your
local installer, distributor or factory representative for
more information.
B. Ground Water Installation
A ground water system gets its name from the open
discharge of water after it has been used by the heat
pump. A well must be available that can supply all of the
water requirements (see Table 1) of the heat pump for up
to 24 hours/day on the coldest winter day plus any other
water requirements drawing off that same well.
Figure 5 shows the necessary components for ground
water piping. First, a bladder type pressure tank with a
“draw down” of at least 1½ times the well pump capacity
must be installed on the supply side of the heat pump.
Shut off valves and boiler drains on the entering and
6
leaving water lines are necessary for future maintenance.
Important – A screen strainer must be placed on the
supply line with a mesh size of 40 or 60 and enough
surface area to allow for particle buildup between
cleanings.
Important – Pressure/Temperature (P/T) ports must be
placed in the supply and discharge lines so that
thermometers or pressure gauges can be inserted into the
water stream.
Important – A visual flow meter must be installed to
allow visual inspection of the flow to determine when
maintenance is required. (If you can’t read the flow,
cleaning is required. See Water Coil Maintenance for
cleaning instructions.)
A solenoid control valve must be installed on the water
discharge side of the heat pump to regulate the flow
through the unit. Wire the solenoid to the “Plug,
Accessory” connector on the controller. This valve opens
when the unit is running and closes when the unit stops.
Schedule 40 PVC piping, copper tubing, polyethylene or
rubber hose can be used for supply and discharge water
lines. Make sure line sizes are large enough to supply the
required flow with a reasonable pressure drop (generally
1” diameter minimum).
Water discharge is generally made to a drain field, stream,
pond, surface discharge, tile line, or storm sewer.
Important – ensure the discharge line has a pitch of at
least three inches per 12 feet, has a minimum 2 feet of
unobstructed freefall at the end of the line, and has at least
100 feet of unobstructed grade sloping away from the
discharge outlet.
CAUTION – A drain field requires soil conditions and
adequate sizing to ensure rapid percolation. Consult local
codes and ordinances to assure compliance. DO NOT
discharge the water into a septic system.
CAUTION – Never operate with flow rates less than
specified. Low flow rates, or no flow, may cause the unit
to shut down on a pressure lockout or may cause a freeze
rupture of the heat exchanger.
1. Ground Water Freeze Protection
CAUTION – Only specifically ordered equipment with
a factory-installed 60 psig low-pressure switch can be
used on ground water applications. (The low-pressure
switch on a ground loop system has a 35 psig (previously
50) nominal cutout pressure.) If the water supply to the
heat pump were interrupted for any reason, continued
operation of the compressor would cause the water
remaining in the heat exchanger to freeze, rupture the heat
exchanger and may void warranty.
2. Water Coil Maintenance
Water quality is a major concern for ground water
systems. Problems can occur from scaling, particle
buildup, suspended solids, corrosion, pH levels outside
the 7-9 range, biological growth, or water hardness of
greater than 100-PPM. If poor water quality is known to
exist in your area, a cupro-nickel water coil may be
required when ordering the system; or installing a ground
loop system may be the best application. Water coil
cleaning on ground water systems may be necessary on a
regular basis. Depending on the specific water quality, the
water coil can be cleaned by the following methods (Note
– always remember to clean the strainer.):
a. Chlorine Cleaning (Bacterial Growth)
1. Turn off all power to the heat pump during this
procedure.
2. Close the shut-off valves upstream and downstream of
the heat exchanger.
3. Connect a submersible pump to the hose bibs on the
entering and leaving-water sides of the heat exchanger
for reverse-direction flow.
4. Submerse the pump in a 5-gallon pail of water with
enough chlorine bleach to kill the bacteria. Suggested
mixture is 1 part chlorine bleach to 4 parts water.
5. Open the hose bibs to allow circulation of the solution.
CAUTION – DO NOT allow the chlorine mixture
to stand idle in the heat exchanger.
6. Start the pump and circulate the solution through the
heat exchanger for about 15 minutes with at least
150% of the normal rated flow rate. The solution
should change color to indicate the chlorine is killing
and removing the bacteria from the heat exchanger.
7. Flush out the used solution by adding a fresh water
supply to the pail. Repeat until the leaving water is
clear.
This procedure can be repeated annually, semiannually, or
as often as it takes to keep bacteria out of the heat
exchanger, or when bacteria appears in the visual flow
meter to the point the flow cannot be read.
Another alternative to bacteria problems is to shock your
entire well. Shocking the well may give longer term relief
from bacteria problems than cleaning the heat exchanger,
but will probably need to be repeated, possibly every
three to five years. Contact a well driller in your area
for more information.
b. Muriatic Acid Cleaning (Difficult Scaling and
Particle Buildup Problems)
1. WARNING – Consult installer because of the
dangerous nature of acids. Only an experienced and
trained professional should perform this procedure.
(Note – Use Oxalic Acid, CLR, Iron-Out or other descaling products before using Muriatic Acid.)
2. Turn off all power to the heat pump during this
procedure.
3. Close the shut-off valves upstream and downstream of
the heat exchanger.
4. Connect a submersible circulating pump to the hose
bibs on the entering and leaving water sides of the heat
exchanger for reverse-direction flow. Note – these are
corrosive chemicals. Use disposable or suitable pump.
5. Submerse the pump in a five-gallon pail of water with
a small amount of muriatic acid to create a final
concentration of 5% muriatic acid.
7
WARNING – Always add acid to water; never add
water to acid.
6. Open the hose bibs to allow circulation.
7. Start the pump and circulate the solution through the
heat exchanger for about 15-30 minutes with at least
150% of the normal rated flow rate.
8. Flush out the used solution by adding a fresh water
supply to the pail. Repeat until the leaving water is
clear. Note – observe local codes for disposal.
c. Freeze Cleaning (Scale/Particle Buildup)
This applies only to Cupro Nickel heat exchangers,
cylinder shape, used on Ground Water Applications.
WARNING – Never attempt this process on a braze
plate heat exchanger. It could cause the braze plate heat
exchanger to rupture and may void the warranty.
I. Before using the freeze cleaning procedure, verify it
needs to be done by answering the following questions.
1. Determine and verify that the required water flow rate
in GPM is both present and correct.
2. Determine the temperature differential of the water.
Under normal conditions in the cooling mode, there
should be a temperature difference of about 10-15°F
between the supply side and discharge side. If the
temperature difference is 8°F or less, consideration
should be given to cleaning the water coil.
II. If the water coil requires cleaning, carefully use the
following steps for the freeze cleaning method.
1. Turn off the heat pump and its water supply.
2. Open a plumbing connection on the water supply side,
if possible, to break the system vacuum and allow
easier drainage of the system and water coil.
3. Drain the water out of the system and water coil via the
boiler drains on the entering and leaving water lines,
and the drain on the heat exchanger.
WARNING – FAILURE TO COMPLETELY DRAIN
THE WATER COIL HEAT EXCHANGER COULD
FREEZE RUPTURE THE HEAT EXCHANGER!
4. Set the thermostat to "Heat" to start the heat pump in
the heating mode and quickly freeze the coil.
5. Allow the heat pump to run until it automatically shuts
off on low pressure and then turn the thermostat to the
"Off" position.
6. Recap the water coil drain and tighten any plumbing
connections that may have been loosened.
7. If so equipped, open the field installed drain cock on
the water discharge side of the heat pump, and install a
short piece of rubber hose to drain into a drain or
bucket. A drain cock on the discharge side allows
water flow to bypass the solenoid valve, flow valve,
flow meter, or any other item that may be clogged by
mineral debris. Draining to a bucket helps prevent
clogging of drains and allows observing effectiveness
of the procedure.
8. Turn on the water supply to the heat pump to start the
process of flushing any mineral debris from the unit.
9. Set the thermostat to "Cool" and start the heat pump in
the cooling mode to quickly thaw out the water coil.
10. Run the heat pump until the water coil is completely
thawed out and loosened scale, mineral deposits, or
other debris is flushed completely from the water
coil. Allow at least five minutes of operation to
ensure that the water coil is thoroughly thawed out.
11. If the water still contains mineral debris, and if the
flow through the unit did not improve along with an
increase in the temperature difference between the
water supply and water discharge, repeat the entire
procedure.
12. Reset the heat pump for normal operation.
VII. ELECTRICAL SERVICE
Note – Always refer to the inside of the electrical box
cover for the correct wiring diagram, and always refer
to the nameplate on the exterior of the cabinet for the
correct electrical specifications.
WARNING – ELECTRICAL SHOCK CAN CAUSE
PERSONAL INJURY OR DEATH. Disconnect all
power supplies before installing or servicing electrical
devices. Only trained and qualified personnel should
install, repair or service this equipment.
WARNING – THE UNIT MUST BE PROPERLY
GROUNDED!
The main electrical service must be protected by a fuse or
circuit breaker, and be capable of providing the amperes
required by the unit at nameplate voltage. All wiring shall
comply with the national electrical code and/or any local
codes that may apply. Access to the line voltage contactor
is through the knockouts provided on either side of the
heat pump next to the front corner. Route EMT or flexible
conduit with appropriate size and type of wire.
Ensure adequate supply wiring to minimize the level of
dimming lights during compressor startup on single-phase
installations. Some dimming is normal, and a variety of
start-assist accessories are available if dimming is
objectionable. Important – some models already have
a factory-installed start assist. Do not add additional start
assists to those units.
CAUTION – Route field electrical wiring to avoid
contact with electrically live bare metal parts inside the
electrical box and to avoid contact with the surface of the
factory-installed start assist (if provided).
CAUTION – Disconnect the power from the unit
before removing or replacing any connectors, or servicing
the blower motor.
CAUTION – When servicing an ECM blower motor,
disconnect power and wait at least five minutes before
opening the motor to avoid electric shock from the
motor’s internal capacitors.
CAUTION – Three-phase units must be wired properly
to ensure proper compressor rotation. Improper rotation
may result in compressor damage. An electronic phase
sequence indicator must be used to check supply-wiring
8
phases. Also, the “Wild” leg of the three-phase power
must be connected to the middle leg on the contactor.
Important – Only 208Vac FlowCenters can be wired
directly to the compressor contactor and can be grounded
in the grounding lug for 208/230Vac. An alternative loop
pump or a pump for a different supply voltage must be
powered from a separate fused power supply and
controlled through an isolation relay that has its coil wired
to the contactor circuit.
Important – Units with internal installed Supplemental
Electric Heat require a separate power supply for the
Supplemental Electric Heat.
For units with the PSC blower motor, an internal relay
provides the power through the 3-pole terminal block
(BF) for the forced-air blower motor. To change blower
speeds, move the blower motor wire on BF to the desired
speed. The effect of changing the blower speed setting on
CFM output is shown in Table 4.
VIII. 24 VOLT CONTROL CIRCUIT
Note – Always refer to the inside of the electrical box
cover for the correct wiring diagram.
There are three basic sections of the low voltage circuit;
transformer, thermostat, and controller.
A. Transformer
An internal transformer provides 24Vac for all control
features of the heat pump. Even though the transformer is
larger than the industry standard, it is in a warm electrical
box and can be overloaded quickly. Table 5 shows the
transformer usage.
Table 5 – Transformer Usage (VA)
Usage (VA)
Component
Contactor
Reversing Valve
Controller 20-1038
Thermostat
Blower Motor
Blower Relay
Elec. Heat Relay (2)
Plug Accessory (PA)
Total
Transformer VA size
17-27
UxOx
37-57
UxVx
87
UxOx
110
UxTx
7
8
2
1
--6
6
10
40 VA
60
7
8
2
1
2
--6
10
36 VA
75
16
8
2
1
--6
--10
43 VA
75
7 (2)
8
2
1
--6 (2)
--5
42 VA
75
Important - If the system’s external controls require
more than shown in table 5, an external transformer and
isolation relays should be used.
Important – Incorrect wiring of 24Vac control voltage
on system controls can result in transformer burnout.
Important – Units with a dual voltage rating (example,
208/230) are factory-wired for the higher voltage
(example, 230). If connected to a power supply having the
lower voltage, change the wiring to the transformer
primary to the correct lead; otherwise premature failure,
or inability to operate the control components may occur.
B. Thermostat
At a minimum, a 1-heat/1-cool heat pump thermostat
must be used. If the unit is equipped with supplemental
electric heat, a 2-heat/1-cool heat pump thermostat must
be used. The thermostat controls all stages of operation of
the heat pump. Initiation of each stage is implemented
based on the recovery rate of the actual temperature to the
set point temperature. This means that switching to a
higher stage will require time (sometimes 15 minutes or
more) for the thermostat to calculate rate of change.
Consult the instructions in the thermostat box for proper
mounting, installer set-up, and operation.
Important – Be careful to select a thermostat location
where external temperature sources will not affect sensed
temperature.
Important – If a single thermostat controls multiple
heat pumps, the control wiring of the heat pumps must be
isolated from each other with isolation relays to avoid
excessive voltages or overheating and premature failure
of the control components.
Important – Thermostat cable with at least eight
conductors must be run from the heat pump to the
thermostat. Power is supplied to the thermostat by
connecting the R and X (C) terminals to the heat pump
terminal strip.
C. Controller
The controller receives a signal from the thermostat and
initiates the correct sequence of operations for the heat
pump. The controller performs the following functions:
1. Compressor Anti-Short-Cycle
2. Compressor Control
3. Ground Loop Pump / Ground Water Initiation
4. Compressor Staging
5. Blower Motor Control
a. PSC Blower Operation and Speed Control
(-UxOx)
b. ECM Blower Operation and Speed Control
(-UxVx)
6. Supplemental Electric Heat for 2nd Stage Heat
7. 4-Way Valve Control
8. Compressor Lockouts
9. Air Coil Defrost
10. System Diagnostics
11. 24Vac Fuse
12. Plug Accessory
13. Alarm Output
1. Compressor Anti-Short-Cycle
An Anti-Short-Cycle (ASC) is a delay period between the
time a compressor shuts down and when it is allowed to
come on again. This protects the compressor and avoids
nuisance lockouts for these two conditions;
1. A 70 to 130-second random time-out period occurs
9
before a re-start after the last shut down.
2. A 4-minute/25-second to 4-minute/45-second randomstart delay occurs immediately after power is applied
to the heat pump. This occurs only after reapplying
power to the unit. To reduce this timeout delay while
servicing the unit, apply power, disconnect and
reapply power very quickly to shorten the delay.
Note - The thermostat supplied with the heat pump may
also have a five-minute delay period after compressor
shutdown before it will start again. A “Wait” indicator on
the thermostat shows this delay. This delay can be
reprogrammed to be from zero to five minutes.
2. Compressor Control
When 24Vac is applied to the Y terminal on the controller
wiring block, the controller decides, based on lockout and
anti-short-cycle periods, when to turn on the compressor
contactor. The M1 output of the controller energizes the
contactor until 24Vac is removed from the Y terminal.
3. Ground Loop Pump / Ground Water
Initiation
On ground loop systems, a M1 output from the controller
energizes the contactor to start the compressor and the
ground loop pump. For Ground Water systems, the M1
output will also energize the ground water solenoid valve
through the “Plug Accessory” connector.
.
5. a. PSC Blower Operation and Speed
Control (-UxOx)
When 24Vac is applied to the G terminal on the controller
wiring block, the controller passes this 24Vac power
directly to the blower motor relay
5. b. ECM Blower Operation and Speed
Control (-UxVx)
When 24Vac is applied to the G terminal on the controller
wiring block, the controller will energize the blower to
operate at Low (G) speed. If 24Vac is applied to both G
and Y (during 1st-stage operation), the controller will
energize the blower to operate at Medium(Y) speed. An
input to W2 (2nd stage heat) or E (Emergency heat) from
the thermostat energizes the blower in high speed. These
blower speeds are shown in Table 5.
The CFM outputs are factory set, and should not be
changed in the field. There is an “Adjust” setting, which
allows the blower to be operated at +/-10% of the factory
setting. For example, if the Adjust tap is set to the “-”, all
the speeds will operate at 90% of the factory setting. If the
Adjust tap is set to the “+”, all the speeds will operate at
110% of the factory setting. The Adjust tap is the only tap
on the Blower Speed Controller that should ever be
moved from the factory setting.
Important – Power to the unit has to be interrupted for
a few seconds to enable new ECM speed settings. The
blower motor has internal circuitry that will maintain the
selected CFM when changes occur in the external static
pressure, such as the filter getting dirty. The motor does
this by increasing its torque output to compensate for
external duct static pressure resistance changes.
Important – The ECM motor is Factory programmed
with soft start and soft stop speed profiles to ensure the
blower motor softly ramps to the proper CFM. Ramping
provides quieter operation and increased comfort. It may
take a few seconds for the blower to start when the
thermostat initially calls for heating or cooling, and for
the blower to stop after the thermostat is satisfied.
6. Supplemental Electric Heat for 2nd Stage
Heat & Emergency Heat Mode
The Ultra Top Discharge vertical units have the option
of field-installed electric supplemental heat. Use a
separate duct-installed heater for Bottom Discharge and
Horizontal applications. This provides an extra 5
kilowatts (approximately 17,000 BTU/hr) of supplemental
heat when the room thermostat calls for auxiliary heat and
provides 10 kilowatts (approximately 34,000 BTU/hr) of
backup heat when the room thermostat is set to the
emergency heat mode. The heater can also be wired to
supply the full 10kW during either supplemental or
emergency heat modes.
Important – A jumper plug on the 20-1038 controller
(marked J2) ties W2 signal to E. This jumper plug must
be removed for 5 kW of supplemental heat and 10 kW of
emergency heat. If the J2 jumper is not removed, the
heater will supply the full 10 kW during either
supplemental or emergency heat modes.
7. 4-Way Valve Control
When 24Vac is applied to the O terminal on the wiring
block, the controller energizes its O output to provide
24Vac power to the 4-way reversing valve to switch the
refrigerant circuit to the cooling mode.
8. Compressor Lockouts
The controller will lock out the compressor if either the
high-pressure 600 psig or the low-pressure 35 psig
(previously 50) on ground loop or 60 psig on ground
water switch opens. This lockout condition means that the
unit has shut down to protect itself, and will not come
back on until power has been disconnected (via the circuit
breaker) to the heat pump for one minute. Problems that
could cause a lockout situation include:
1. Low water flow or extreme water temperatures
2. Low air flow or extreme air temperatures
3. Cold ambient air temperature conditions
4. Internal heat pump operation problems.
If a lockout condition exists, the heat pump should not
be reset more than once; and a service technician should
be called immediately.
CAUTION – Repeated reset may cause severe damage
to the system and may void warranty. The cause of the
lockout must be determined and corrected.
9. Air Coil Defrost
Restricted airflow in the cooling mode, caused by a dirty
air filter or airside heat exchanger, may result in an iced
up air coil and/or low suction pressure. The controller will
10
automatically switch the heat pump to defrost mode if the
low-pressure switch opens during the cooling mode: the O
output will be de-energized to run the unit in heating, the
blower will continue to run, and the Low Pressure
indicator light will blink. This defrost mode will last for
approximately 80 seconds, then the unit will go to the 70130-second time-out re-start delay. After the delay times
out, the heat pump will resume normal operation.
CAUTION – If the heat pump continually goes to the
air coil defrost mode, a service technician should be
called immediately.
10. System Diagnostics
The controller is equipped with diagnostic LED lights that
indicate the system status at any particular time. The
lights indicate the following conditions:
1. 24 Volt system power
GREEN
2. Fault or Lockout
YELLOW
3. Anti-short-cycle mode
RED
If a room thermostat installed with the heat pump system
has a lockout indicator, the controller will send a signal
from L on the terminal strip to a LED on the thermostat to
indicate a lockout condition.
11. 24 Vac Fuse
The controller has a glass-cartridge fuse located on the
circuit board adjacent to the 24Vac power connector. The
green system power LED will be off if this fuse is open.
A spare fuse is located in the saddle attached to the side of
the 24Vac power connector.Note – Ensure the new fuse
fits tightly in the fuse clips after replacement.
12. Plug Accessory (PA)
The Plug Accessory output is internally connected to the
M1 output and is energized whenever M1 turns on the
compressor contactor. The maximum rating of this output
is 10VA sealed and 20VA inrush and is typically intended
to power a 24Vac ground water solenoid valve.
13. Alarm Output
This output is a 2-position screw terminal connector
identified as “Fault Test” on the controller board and as
DO on the wiring diagram. It is an isolated dry contact
output (0.1 ohm resistance) that closes during a controller
lockout and is intended for use as an input to a dial-out
type of monitoring system. The maximum electrical rating
is 2mA up to 30Vac or 50mA up to 40Vdc.
IX. STARTUP / CHECKOUT
Before applying power to the heat pump, check the
following items:
 Water supply plumbing to the heat pump is completed
and operating. Manually open the water valve on well
systems to check flow. Make sure all valves are open
and air has been purged from a loop system. Never
operate the system without correct water flow.
 All high voltage and low voltage wiring is correct and
checked out, including wire sizes, fuses and breakers.
Set thermostat to the “OFF” position.
 The heat pump is located in a warm area (above 45 oF).
Starting the system with low ambient temperature
conditions is more difficult. Do not leave until the
space is brought up to operating temperatures.
You may now apply power to the unit. A 4-minute/35second delay on power up is programmed into the heat
pump before the compressor will operate. During this
time you can verify airflow with the following procedure:
 Place the thermostat in the “FAN ON” position. The
blower should start in low speed. Check airflow at the
registers to make sure that they are open and that air is
being distributed throughout the house. When airflow
has been checked, move the thermostat to the “FAN
AUTO” position. The blower should stop.
The following steps will ensure the system is heating and
cooling properly. After the initial time-out period, the red
indicator light on the controller will shut off. The heat
pump is now ready for operation.
 With the thermostat in the “HEAT” mode, turn it up to
its highest temperature setting. The compressor should
start, with the blower starting a few seconds later. The
thermostat may have its own compressor delay (shown
by “Wait” on the thermostat), but the compressor will
start after all delays.
 After running the unit for five minutes, check the
airside return and supply temperatures. An air
temperature rise of 20oF to 30oF is normal in the
heating mode, but variations in water temperature and
water flow rate can cause variations outside the normal
range. Use a single pressure gauge to check the fluid
pressure drop through the ground-side heat exchanger
to ensure proper flow for the system.
 Turn the thermostat to the “OFF” mode. The
compressor will shut down in a few seconds, with the
blower stopping shortly after.
 Next, set the thermostat to “COOL” and turn down to
its lowest setting. The compressor will start after an
anti-short cycle period of 70 to 130 seconds from its
last shutdown, and the blower will start a few seconds
later. The anti-short cycle period is indicated by the
red light (labeled ASC) on the controller.
 After the unit has run in cooling for five minutes,
check the airside return and supply temperatures. An
air temperature drop of 15oF to 20oF is normal in the
cooling mode but airflow and humidity can affect
temperature drop.
 Set the thermostat for normal operation.
 Instruct the owner on the correct operation of the
entire heat pump system. The unit is now operational.
X. SERVICE and LOCKOUT
LIGHTS
Properly installed, the ECONAR Ultra heat pump
requires only minor maintenance, such as periodic
cleaning of the air coil, air filter, and the ground water
11
heat exchanger on a Ground Water system. Setting up
regular service checkups with your Enertech dealer
should be considered. Any major problems with the heat
pump system operation will be indicated on the lockout
lights.
CAUTION – During evacuation of refrigerant of a
system not having antifreeze protection of a water-side
heat exchanger, water in the unprotected heat exchanger
must be removed or continuously flowing to avoid a
potential heat exchanger failure caused by freeze rupture.
CAUTION – Service on systems using R410A
refrigerant requires special consideration (Refer to
ECONAR Instruction 10-2016 for more detail.). Always
install a new filter/dryer after replacing a refrigeration
component (compressor, etc.) and evacuate down to 150
microns.
manner. Be careful in selecting optional filters so that
excessive external resistance to airflow does not occur.
C. Preseason Inspection
Before each season, the air coil, drain pan, and condensate
drain should be inspected and cleaned as follows:
 Turn off the circuit breakers.
 Remove the access panels.
 Clean the air coil by vacuuming it with a soft-brush
attachment.
 Remove any foreign matter from the drain pan.
 Flush the pan and drain tube with clear water.
 Replace the access panels and return power to the unit.
D. Ground Water Heat Exchanger
Refer to Section VI.B.2 for details.
A. Lockout Lights
The heat pump controller and room thermostat will
display a system lockout. If lockout occurs, follow the
procedure below:
1. Determine and record which indicator lights on the
Controller are illuminated. (Refer to Section XIII for
more information on possible causes of Lockout
Conditions.)
2. Check for a clean air filter, correct air-flow, and
correct water supply from the ground loop or ground
water system.
3. Reset the system by disconnecting power at the circuit
breaker for one minute, and then reapplying power.
4. If shutdown reoccurs,  call your Enertech dealer.
Do not continuously reset the lockout condition or
damage may occur. Note – Improper fluid flow,
incorrect airflow, or incorrect antifreeze levels are
the cause of almost all lockouts.
B. Air Filter
The Ultra forced air heat pump includes a disposable air
filter. This filter should normally be replaced once a
month during normal usage, or more frequently during
extreme usage or if system performance has decreased.
A dirty filter will increase static pressure to the system
and decrease the amount of airflow (CFM) for a PSC
blower motor. If a variable speed ECM blower is being
used, an increase in static pressure will cause the variable
speed blower to increase its speed in order to maintain
airflow levels. In extreme cases, the blower will not be
able produce the correct amount of airflow. These system
changes will cause the unit to consume more power than
normal, reducing the efficiency of the system. In the
heating mode, reduced airflow may increase the cost of
operation and, in extreme cases, cause system lockout due
to high refrigerant pressures. In the cooling mode,
reduced airflow may reduce cooling capacity and, in
extreme cases, ice the air coil over causing system
shutdown due to low refrigerant pressures.
If a different filter is used in place of the factory-supplied
filter, it should also be cleaned or changed in a timely
XI. ROOM THERMOSTAT
OPERATION
Installations may include a wide variation of available
electronic room thermostats, and most of them are
required to be configured by the Installer (according to
the Installation Guide included with the thermostat) and
checked out after being installed.
Important – At a minimum:
1. Ensure the thermostat is set up for the “System Type”
it is installed on.
2. Ensure the thermostat is configured for “Manual
Heat/Cool Changeover.”
3. Change other Installer Settings only if necessary.
4. Remember to press “Done” to save the settings and to
exit “Installer Setup.”
5. Run the system through all modes of operation in the
thermostat instructions to ensure correct operation.
If you have additional questions, please refer to the
installation manual that was sent with the thermostat.
XII. DESUPERHEATER (OPTIONAL)
A Ultra heat pump equipped with a double-wall vented
desuperheater can provide supplemental heating of a
home’s domestic hot water by stripping some energy from
the superheated gas leaving the compressor and
transferring it to a hot water tank. A desuperheater pump,
manufactured into the unit, circulates water from the
domestic hot water tank, heats it and returns it to the tank.
The desuperheater only provides supplemental heating
when the compressor is already running to heat or cool
the conditioned space. Because the desuperheater is using
some energy from the heat pump to heat water, the heat
pump’s capacity in the winter is about 10% less than a
unit without a desuperheater. During extremely cold
weather, or if the heat pump cannot keep up with heating
12
the space, the desuperheater fuse may be removed to get
full heating capacity out of the unit.
WARNING – Do not remove the desuperheater’s high
temperature cutout switch, or tank temperatures could
become dangerously high. The desuperheater's high
temperature cutout switch is located on the return line
from the water heater and is wired in series with the
desuperheater pump to disable it from circulating at
entering water temperatures above 140oF. If the tank
temperatures become uncomfortably hot, move this
switch to the leaving water line, which will reduce the
tank maximum temperatures 10oF to 15oF.
CAUTION – Running the desuperheater pump without
water flow will damage the pump. A fuse is attached to
the fuse holder and must be inserted in the fuse holder
after the desuperheater is purged and operational.
Important – Do not insert the fuse until water flow is
available and the desuperheater is completely purged of
air, or the pump may be damaged. Remove the fuse to
disable the pump if the desuperheater isn’t in operation.
bottom of the water heater (See Figure 6). This is the
preferred method for ease of installation, comfort and
efficiency. The tee eliminates the need to tap into the
domestic hot water lines and eliminates household water
supply temperature variations that could occur from
connecting to the hot water pipes. Poor water quality may
restrict the effectiveness of using the desuperheater tee by
plugging it with scale or buildup from the bottom of the
tank, restricting water flow.
METHOD 2
Taking water from the bottom drain and returning it to
the cold water supply line (See Figure 7). This method
maintains the same comfort and efficiency levels but
increases installation time and costs.
Important – This method requires a check valve in the
return line to the cold water supply to prevent water from
flowing backwards through the desuperheater when the
tank is filling. Water passing through the pump
backwards damages the rotor’s bearing, which reduces
pump life and causes noise problems in the pump.
Note - A spring-type check valve with a pressure-drop
rating of 1/2 psig or less is recommended.
All air must be purged from the desuperheater plumbing
before the pump is engaged. To purge small amounts of
air from the lines, loosen the desuperheater pump from its
housing by turning the brass collar. Let water drip out of
the housing until flow is established, and re-tighten the
brass collar. Using 1/2-inch copper tubing from the tank
to the desuperheater inlet is recommended to keep water
velocities high, avoiding air pockets at the pump inlet. An
air vent in the inlet line can also help systems where air is
a problem. If one is used (recommend Watts Regulator
brand FV-4 or Spirovent), mount it near the desuperheater
inlet roughly 2-1/2 inches above the horizontal pipe.
Shutoff valves allow access to the desuperheater
plumbing without draining the hot water tank. Keep the
valves open when the pump is running.
Desuperheater maintenance includes periodically opening
the drain on the hot water tank to remove deposits. If hard
water, scale, or buildup causes regular problems in hot
water tanks in your area, it may result in a loss of
desuperheater effectiveness. This may require periodic
cleaning with Iron Out.
CAUTION – Insulated copper tubing must be used to
run from the hot water tank to the desuperheater
connections on the side of unit.
The built-in desuperheater pump can provide the proper
flow to the desuperheater if the total equivalent length of
straight pipe and connections is kept to a maximum of 90
feet of ½-inch type L copper tubing (or a combination of
approximately 60 feet with typical elbows and fittings).
This tubing can be connected to the water tank in two
ways:
METHOD 1
Using a desuperheater tee installed in the drain at the
13
XIII. Performance Ratings
Ultra Forced Air Vertical Models
Ground Loop
HEATING
32ºF EWT
AHRI/ISO 13256-1
MODELS
EV 170/171
EV 270/271
EV 370/371
EV 470/471
CFM
625
900
1100
1550
GPM
5
8
9
12
BTU/hr
14,500
22,300
32,000
41,000
COP
3.3
3.6
3.6
3.6
Ground Water
COOLING
77ºF EWT
BTU/hr
18,800
28,000
35,000
48,000
HEATING
50ºF EWT
AHRI/ISO 13256-1
EER
17.4
18.0
17.1
17.1*
MODELS
EV 170/171
EV 270/271
EV 370/371
EV 470/471
CFM
625
900
1100
1550
GPM
5
8
9
12
BTU/hr
19,300
28,000
36,500
49,500
COP
4.0
4.2
4.1
4.1
COOLING
59ºF EWT
BTU/hr
20,400
32,000
36,000
50,100
EER
23.9
25.0
21.1
21.1*
Configuration Options
Ultra Forced Air Models
Model Suffix
Exxx0-x-Uxxx
Exxx1-x-Uxxx
Exxxx-1-Uxxx
Exxxx-2-Uxxx
Exxxx-3-Uxxx
Exxxx-5-Uxxx
EHxxx-6-Uxxx
EHxxx-7-Uxxx
EHxxx-8-Uxxx
EVxxx-x-UOxx
EVxxx-x-URxx
EVxxx-x-UBxx
EHxxx-x-UOxx
EHxxx-x-UCxx
EHxxx-x-UxTx
Exxxx-x-UxOx
Exxxx-x-UxVx
Exxxx-x-UxxO
Exxxx-x-UxxN
Description
Standard, No Desuperheater
Desuperheater
Standard, 208/230-1, 60 Hz
208/230-3, 60Hz
460-3, 60Hz
277-1, 60Hz
208/230-1, 60Hz w/ EMS
208/230-3, 60Hz w/ EMS
460-3, 60Hz w/ EMS
Standard, Left Side Air Return
Right Side Return
Bottom Discharge (right return)
Standard, End Right Discharge
Front Right Discharge
Staged Tandem Compressor
Standard PSC Blower
Variable Speed ECM Blower
Standard Earth Loop Coil
Cupro-Nickel Well Water Coil
1
Brazed Plate Ground Loop Heat Exchanger
 Standard
 Special Order
17




Vertical
27
37











47














1

1



1



1

14
XIV. Performance Data, Ultra Forced Air Models
EV 170/171 @ 625 CFM
EWT GPM
4
15
5
6
4
20
5
6
4
25
5
6
4
30
5
6
4
35
5
6
2
45
3
5
2
50
3
5
2
60
3
5
2
70
3
5
dP
ft
3.0
5.0
7.0
3.0
5.0
7.0
3.0
5.0
7.0
3.0
5.0
7.0
3.0
5.0
7.0
2.0
2.0
5.0
2.0
2.0
5.0
2.0
2.0
5.0
2.0
2.0
5.0
HEATING @ 68oF DB
dP
psi MBTU/hr KW COP
1.5
12.9
1.1
3.3
2.2
13.3
1.1
3.4
3.0
13.5
1.2
3.4
1.5
13.7
1.2
3.5
2.2
14.1
1.2
3.6
3.0
14.3
1.2
3.6
1.5
14.4
1.2
3.6
2.2
14.9
1.2
3.7
3.0
15.1
1.2
3.7
1.5
15.2
1.2
3.7
2.2
15.6
1.2
3.8
3.0
15.9
1.2
3.8
1.5
15.9
1.2
3.9
2.2
16.4
1.2
4.0
3.0
16.7
1.2
4.0
0.9
17.3
1.3
4.0
0.9
17.7
1.3
4.1
2.2
18.0
1.3
4.2
0.9
18.0
1.3
4.1
0.9
18.4
1.3
4.1
2.2
18.7
1.3
4.3
0.9
19.3
1.4
4.2
0.9
19.7
1.4
4.2
2.2
20.3
1.3
4.5
0.9
20.6
1.4
4.3
0.9
21.1
1.4
4.3
2.2
21.8
1.3
4.8
SUCT
PRESS
52-62
53-63
54-64
60-70
61-71
62-72
67-77
68-78
69-79
74-84
75-85
76-86
82-92
83-93
84-94
97-107
98-108
99-109
101-111
102-112
105-115
110-120
111-121
120-130
118-128
119-129
135-145
HEAD
PRESS EWT GPM
265-285
2
270-290
40
3
275-295
5
275-295
2
280-300
50
3
285-305
5
285-305
2
290-310
60
3
295-315
5
290-310
2
295-315
70
3
300-320
5
300-320
4
305-325
75
5
310-330
6
320-340
4
325-345
80
5
325-345
6
325-345
4
330-350
85
5
330-350
6
345-365
4
350-370
90
5
350-370
6
365-385
4
370-390
95
5
370-390
6
dP
ft
2.0
2.0
5.0
2.0
2.0
5.0
2.0
2.0
5.0
2.0
2.0
5.0
3.0
5.0
7.0
3.0
5.0
7.0
3.0
5.0
7.0
3.0
5.0
7.0
3.0
5.0
7.0
COOLING @ 80oF DB/67oF WB
dP
psi MBTU/hr KW EER
0.9
21.4
0.9
23.4
0.9
21.8
0.9
24.6
2.2
22.5
0.9
25.8
0.9
21.0
1.0
21.5
0.9
21.5
1.0
22.6
2.2
22.1
0.9
23.7
0.9
20.7
1.0
19.8
0.9
21.1
1.0
20.8
2.2
21.8
1.0
21.9
0.9
20.4
1.1
18.3
0.9
20.8
1.1
19.3
2.2
21.4
1.1
20.2
1.5
18.4
1.2
15.8
2.2
18.7
1.1
16.6
3.0
18.9
1.1
16.9
1.5
17.9
1.2
15.0
2.2
18.2
1.2
15.8
3.0
18.4
1.1
16.1
1.5
17.4
1.2
14.3
2.2
17.7
1.2
15.0
3.0
17.9
1.2
15.4
1.5
16.9
1.2
13.6
2.2
17.3
1.2
14.3
3.0
17.4
1.2
14.6
1.5
16.4
1.3
13.0
2.2
16.8
1.2
13.6
3.0
16.9
1.2
13.9
SUCT
PRESS
126-136
125-135
116-126
128-138
127-137
120-130
131-141
130-140
124-134
133-143
132-142
128-138
131-141
130-140
129-139
133-143
132-142
131-141
135-145
134-144
133-143
137-147
136-146
135-145
139-149
138-148
137-147
HEAD
PRESS
175-195
170-190
140-160
210-230
205-225
180-200
250-270
245-265
215-235
290-310
285-305
255-275
280-300
275-295
270-290
295-315
290-310
285-305
315-335
310-330
305-325
335-355
330-350
325-345
355-375
350-370
345-365
dP
ft
1.8
2.8
6.5
1.8
2.8
6.5
1.8
2.8
6.5
1.8
2.8
6.5
5.5
6.5
8.3
5.5
6.5
8.3
5.5
6.5
8.3
5.5
6.5
8.3
5.5
6.5
8.3
COOLING @ 80oF DB/67oF WB
dP
psi MBTU/hr KW EER
0.8
37.8
1.5
25.8
1.2
38.2
1.4
26.9
2.8
39.4
1.3
29.2
0.8
35.4
1.5
24.1
1.2
35.8
1.4
25.1
2.8
36.9
1.4
27.2
0.8
32.9
1.5
22.3
1.2
33.3
1.5
23.2
2.8
34.3
1.4
25.2
0.8
30.5
1.5
20.5
1.2
30.8
1.5
21.4
2.8
31.8
1.4
23.2
2.4
30.2
1.4
21.8
2.8
30.5
1.4
22.2
3.6
30.8
1.4
22.7
2.4
28.9
1.4
20.8
2.8
29.2
1.4
21.2
3.6
29.5
1.4
21.7
2.4
27.7
1.4
19.8
2.8
27.9
1.4
20.2
3.6
28.2
1.4
20.6
2.4
26.4
1.4
18.9
2.8
26.7
1.4
19.2
3.6
26.9
1.4
19.6
2.4
25.1
1.4
17.9
2.8
25.4
1.4
18.2
3.6
25.6
1.4
18.6
SUCT
PRESS
130-140
129-139
123-133
133-143
132-142
126-136
135-145
134-144
128-138
137-147
136-146
130-140
133-143
132-142
131-141
134-144
133-143
132-142
135-145
134-144
133-143
136-146
135-145
134-144
137-147
136-146
135-145
HEAD
PRESS
165-185
160-180
145-165
195-215
190-210
175-195
225-235
220-240
205-225
265-285
260-280
245-265
265-285
260-280
255-275
285-305
280-300
275-295
300-320
295-315
290-310
320-340
315-335
310-330
335-355
330-350
325-345
EV 270/271 @ 900 CFM
EWT GPM
7
15
8
9
7
20
8
9
7
25
8
9
7
30
8
9
7
35
8
9
4
45
5
8
4
50
5
8
4
60
5
8
4
70
5
8
dP
ft
5.5
6.5
8.3
5.5
6.5
8.3
5.5
6.5
8.3
5.5
6.5
8.3
5.5
6.5
8.3
1.8
2.8
6.5
1.8
2.8
6.5
1.8
2.8
6.5
1.8
2.8
6.5
HEATING @ 68oF DB
dP
psi MBTU/hr KW COP
2.4
17.5
1.7
3.0
2.8
17.7
1.7
3.1
3.6
17.9
1.7
3.1
2.4
18.8
1.7
3.2
2.8
19.0
1.7
3.2
3.6
19.2
1.7
3.3
2.4
20.2
1.7
3.4
2.8
20.4
1.8
3.4
3.6
20.6
1.8
3.4
2.4
21.5
1.7
3.6
2.8
21.7
1.8
3.6
3.6
21.9
1.8
3.6
2.4
22.8
1.8
3.7
2.8
23.1
1.8
3.7
3.6
23.3
1.8
3.7
0.8
24.2
1.8
3.9
1.2
24.5
1.8
4.0
2.8
25.8
1.9
4.1
0.8
25.3
1.8
4.0
1.2
25.8
1.8
4.1
2.8
27.1
1.9
4.2
0.8
27.8
1.8
4.4
1.2
28.3
1.9
4.5
2.8
29.8
1.9
4.6
0.8
30.3
1.9
4.7
1.2
30.9
1.9
4.8
2.8
32.5
1.9
4.9
SUCT
PRESS
51-61
52-62
53-63
59-69
60-70
61-71
67-77
68-78
69-79
76-86
77-87
78-88
84-94
85-95
86-96
97-107
98-108
101-111
105-115
106-116
109-119
122-132
123-133
126-136
138-148
139-149
142-152
HEAD
PRESS EWT GPM
255-275
4
260-280
40
5
265-285
8
265-285
4
270-290
50
5
275-295
8
275-295
4
280-300
60
5
285-305
8
285-305
4
290-310
70
5
295-315
8
295-315
7
300-320
75
8
305-325
9
315-335
7
320-340
80
8
325-345
9
325-345
7
330-350
85
8
335-355
9
350-370
7
355-375
90
8
360-380
9
370-390
7
375-395
95
8
380-400
9
15
EV 370/371 @ 1100 CFM
EWT GPM
8
15
9
10
8
20
9
10
8
25
9
10
8
30
9
10
8
35
9
10
5
45
6
9
5
50
6
9
5
60
6
9
5
70
6
9
dP
ft
6.5
8.3
8.8
6.5
8.3
8.8
6.5
8.3
8.8
6.5
8.3
8.8
6.5
8.3
8.8
5.0
7.0
8.3
5.0
7.0
8.3
5.0
7.0
8.3
5.0
7.0
8.3
HEATING @ 68oF DB
dP
psi MBTU/hr KW COP
2.8
24.5
2.4
3.0
3.6
24.7
2.4
3.0
3.8
25.0
2.4
3.0
2.8
26.6
2.5
3.2
3.6
26.9
2.5
3.2
3.8
27.1
2.5
3.2
2.8
28.7
2.5
3.4
3.6
29.0
2.5
3.4
3.8
29.3
2.6
3.4
2.8
30.8
2.6
3.5
3.6
31.1
2.6
3.5
3.8
31.5
2.6
3.5
2.8
33.0
2.6
3.7
3.6
33.3
2.6
3.7
3.8
33.6
2.7
3.7
2.2
37.0
2.7
4.1
3.0
37.8
2.7
4.1
3.6
37.6
2.7
4.0
2.2
37.6
2.6
4.2
3.0
38.4
2.7
4.2
3.6
39.7
2.8
4.2
2.2
38.9
2.6
4.4
3.0
39.6
2.7
4.4
3.6
44.0
2.9
4.5
2.2
40.1
2.6
4.6
3.0
40.9
2.6
4.6
3.6
48.3
3.0
4.7
SUCT
PRESS
44-54
45-55
56-66
54-64
55-65
56-66
62-72
63-73
64-74
70-80
71-81
72-82
79-89
80-90
81-91
94-104
95-105
98-108
101-111
102-112
106-116
115-125
116-126
125-135
129-139
130-140
142-152
HEAD
PRESS EWT GPM
250-270
5
255-275
40
6
260-280
9
265-285
5
270-290
50
6
275-295
9
280-300
5
285-305
60
6
290-310
9
300-320
5
305-325
70
6
310-330
9
315-335
8
320-340
75
9
325-345
10
345-365
8
350-370
80
9
355-375
10
355-375
8
360-380
85
9
370-390
10
380-400
8
385-405
90
9
405-425
10
405-425
8
410-430
95
9
435-455
10
dP
ft
5
7
8.3
5
7
8.3
5
7
8.3
5
7
8.3
6.5
8.3
8.8
6.5
8.3
8.8
6.5
8.3
8.8
6.5
8.3
8.8
6.5
8.3
8.8
COOLING @ 80oF DB/67oF WB
dP
psi MBTU/hr KW EER
2.2
48.5
1.7 28.3
3
49.5
1.7 28.3
3.6
49.5
1.8 26.8
2.2
46.0
1.8 25.4
3
47.0
1.8 25.4
3.6
46.9
1.9 24.2
2.2
43.6
1.9 22.5
3
44.5
2.0 22.5
3.6
44.4
2.1 21.6
2.2
41.1
2.1 19.7
3
42.0
2.1 19.7
3.6
41.8
2.2 19.0
2.8
40.1
2.3 17.7
3.6
40.5
2.3 17.7
3.8
40.9
2.3 17.7
2.8
38.8
2.4 16.4
3.6
39.2
2.4 16.4
3.8
39.6
2.4 16.4
2.8
37.6
2.5 15.1
3.6
37.9
2.5 15.1
3.8
38.3
2.5 15.1
2.8
36.3
2.6 13.8
3.6
36.7
2.7 13.8
3.8
37.0
2.7 13.8
2.8
35.0
2.8 12.5
3.6
35.4
2.8 12.5
3.8
35.7
2.9 12.5
SUCT
PRESS
124-134
125-135
126-136
124-134
125-135
126-136
124-134
125-135
126-136
125-135
126-136
128-138
127-137
128-138
129-139
127-137
128-138
129-139
127-137
128-138
129-139
128-138
129-139
130-140
128-138
129-139
130-140
HEAD
PRESS
195-215
200-220
210-230
225-245
230-250
240-260
255-275
260-280
270-290
285-305
290-310
300-320
310-330
315-335
320-340
325-345
330-350
335-355
340-360
345-365
350-370
355-375
360-380
365-385
370-390
375-395
380-400
SUCT
PRESS
47-57
48-58
49-59
54-64
56-66
57-67
62-72
63-73
64-74
70-80
71-81
72-82
78-88
79-89
80-90
87-97
88-98
89-99
95-105
96-106
102-112
110-120
111-121
117-127
125-135
126-136
133-143
HEAD
PRESS EWT GPM
240-260
7
245-265 40
8
25-270
12
255-275
7
260-280 50
8
265-285
12
265-285
7
270-290 60
8
275-295
12
280-300
7
285-305 70
8
290-310
12
295-315
11
300-320 75
12
305-325
13
310-330
11
315-335 80
12
320-340
13
325-345
11
330-350 85
12
335-355
13
350-370
11
355-375 90
12
365-385
13
375-395
11
380-400 95
12
390-410
13
dP
ft
5.5
6.5
12.2
5.5
6.5
12.2
5.5
6.5
12.2
5.5
6.5
12.2
10.6
12.2
14.1
10.6
12.2
14.1
10.6
12.2
14.1
10.6
12.2
14.1
10.6
12.2
14.1
COOLING @ 80oF DB/67oF WB
dP
psi MBTU/hr KW EER
2.4
59.9
2.4 24.5
2.8
60.5
2.4 25.0
5.3
63.6
2.4 27.0
2.4
57.6
2.6 22.2
2.8
58.2
2.6 22.6
5.3
60.5
2.5 24.2
2.4
55.3
2.8 19.8
2.8
55.9
2.8 20.2
5.3
57.4
2.7 21.4
2.4
53.0
3.0 17.5
2.8
53.6
3.0 17.9
5.3
54.3
2.9 18.7
4.6
52.3
3.1 16.9
5.3
52.8
3.1 17.3
6.1
53.3
3.0 17.6
4.6
50.7
3.3 15.6
5.3
51.2
3.2 15.9
6.1
51.8
3.2 16.2
4.6
49.2
3.5 14.2
5.3
49.7
3.4 14.5
6.1
50.2
3.6 13.9
4.6
47.7
3.7 12.8
5.3
48.2
3.7 13.1
6.1
48.6
3.6 13.4
4.6
46.1
4.0 11.5
5.3
46.6
4.0 11.7
6.1
47.1
3.9 11.9
SUCT
PRESS
113-123
113-123
115-125
115-125
115-125
117-127
117-127
117-127
119-129
119-129
119-129
120-130
121-131
121-131
122-132
122-132
122-132
123-133
123-133
123-133
124-134
124-134
124-134
125-135
124-134
124-134
125-135
HEAD
PRESS
170-190
165-185
135-155
205-225
200-220
175-195
235-255
230-250
210-230
270-290
265-285
250-270
270-290
265-285
260-280
290-310
285-305
280-300
310-330
305-325
300-320
330-350
325-345
320-340
345-365
340-360
335-355
EV 470/471 @ 1550 CFM
EWT GPM
11
15
12
13
11
20
12
13
11
25
12
13
11
30
12
13
11
35
12
13
7
45
8
12
7
50
8
12
7
60
8
12
7
70
8
12
dP
ft
10.6
12.2
14.1
10.6
12.2
14.1
10.6
12.2
14.1
10.6
12.2
14.1
10.6
12.2
14.1
5.5
6.5
12.2
5.5
6.5
12.2
5.5
6.5
12.2
5.5
6.5
12.2
HEATING @ 68oF DB
dP
psi MBTU/hr KW COP
4.6
31.3
2.9
3.2
5.3
31.6
2.9
3.2
6.1
32.0
2.9
3.2
4.6
33.8
3.0
3.3
5.3
34.2
3.0
3.3
6.1
34.5
3.1
3.3
4.6
36.3
3.1
3.4
5.3
36.7
3.2
3.4
6.1
37.0
3.2
3.4
4.6
38.8
3.2
3.6
5.3
39.2
3.2
3.6
6.1
39.6
3.2
3.6
4.6
41.3
3.3
3.7
5.3
41.7
3.3
3.7
6.1
42.1
3.3
3.7
2.4
45.0
3.4
3.9
2.8
45.5
3.4
3.9
5.3
46.7
3.6
3.8
2.4
47.7
3.5
4.0
2.8
48.2
3.5
4.0
5.3
49.2
3.7
3.9
2.4
53.1
3.7
4.2
2.8
53.6
3.7
4.2
5.3
54.3
3.9
4.1
2.4
58.4
3.9
4.4
2.8
59.0
3.9
4.4
5.3
59.3
4.0
4.3
16
XV. Fan Performance Data
Ultra (-UxOx)
UNIT
SIZE
EV 170/171
EV 270/271
EV 370/371
EV 470/471
FAN
SPEED
Low
Medium
High*
Low
Medium*
High
Low
Medium
High*
Low
Medium
High*
0.10
550
610
675
870
980
1090
1005
1140
1210
1325
1505
1685
External Static Pressure - in WG
0.20
0.25
0.30
0.35
490
460
445
430
550
530
510
480
625
600
580
560
800
775
750
735
900
870
845
830
1000
965
940
920
935
890
855
815
1065
1010
965
935
1110
1070
1030
985
1235
1200
1165
1135
1415
1375
1320
1275
1550
1500
1435
1405
0.15
520
580
650
825
935
1050
965
1100
1150
1275
1450
1625
0.40
410
460
525
710
800
865
805
915
960
1105
1245
1360
0.50
385
440
480
650
760
840
740
840
895
1055
1185
1305
Ultra (-UxVx)
UNIT SIZE
EV 370/371
EV 470/471
Low (G)
485
680
Medium (Y)
1100
1550
High (W2, E)
1210
1705
XVI. Physical Data
37Ux0x
37UxVx
27
4
3
4
5 Vert. / 4 Horz.
5
5
9x7
9x7
10x8
10x8
10x8
11x10
PSC
1/6
PSC
1/4
225
235
Compressor
Expansion Device
Air Coil Type
No. of Air Coil Rows
Fan Wheel (dia. x
width)
Fan Motor Type
Fan Motor (HP)
Desuperheater Pump
Transformer (VA)
Weight (lbs)
Ultra
47Ux0x 47 UxVx
57Ux0x
57UxVx
Compliant Scroll
Thermostatic
High Density
17
1/3
3/4
280
UxOx = PSC; UxVx = Variable Speed ECM
1.0
1/2
3/4
3/4
1/150 HP
55
325
345
67Ux0x
67UxVx
1.0
1.0
385
GH87
GH110
5
10x8
(2)
PSC
1/2 (2)
5
10x8
(2)
PSC
3/4 (2)
495
645
17
XVII. Dimensions – EV Vertical Top Discharge Models
B
A
C
E
F
Access Panels
3.0"
0.88" Dia.
Knockouts
G
H
In from Ground
Loop
Condensate
Drain
Out to Ground
Loop
0.88" Dia.
Knockout
Out to Water
Heater
In from Water
Heater
Desuperheater
W
D
Model
Top-Discharge
Dimensions
H
W
D
Ultra 17 Uxxx
38.2 19.0 24.0
9.38 10.25 1.0 FPT 1.0 FPT 1.0 FPT
20 x 20 (top load)
0.6 19.9 0.88 18.0 7.0
Ultra 27 Uxxx
53.1 21.0 26.0
9.38 10.25 1.0 FPT 1.0 FPT 1.0 FPT
21-5/8 x 29 (top load)
0.6 21.9 1.3 28.5 8.3
53.1 27.0 31.1 12.00 10.25 1.0 FPT 1.0 FPT 1.0 FPT
21-5/8 x 29 (top load)
0.6 21.9 1.3 28.5 7.0
Ultra 37-47 Uxxx
Blower
Opening
A
B
Water
Inlets
Outlets
Cond.
Drain
Filter Size*
(Inches)
C
Other
Dimensions
E
F
G
I
*Note: Filter Rack extends 1-1/4” outward from the cabinet.
Electrical Data (all HCAR-type circuit breaker per NEC)
Ultra Forced Air Models (-UxOx) – (*HCAR-type circuit breaker per NEC)
Model
170/171
270/271
370/371
470/471
Voltage
Phase
Frequency (Hz)
208/230-1, 60
277-1, 60
208/230-1, 60
208/230-3, 60
460-3, 60
277-1, 60
208/230-1, 60
208/230-3, 60
460-3, 60
208/230-1, 60
208/230-3, 60
460-3, 60
Compressor
RLA
9.0
7.1
12.8
8.3
5.1
10.9
15.4
11.5
5.1
23.1
16.0
7.1
LRA
48
43
64
58
28
60
83
77
35
134
91
46
Blower
HP
1/6
1/4
1/4
1/4
1/4
1/4
1/3
1/3
1/3
1/2
1/2
1/2
FLA
1.1
2.0
1.7
1.7
0.9
2.0
2.6
2.6
1.1
3.1
3.1
1.6
Without FlowCenter
Total
Min.
Max
FLA
Amp.
Fuse
---9.1
10.9
15
---10.0
12.1
20
6.0
7.3
10
12.9
15.6
25
---14.1
17.0
25
6.2
7.5
10
---19.1
23.1
35
8.7
10.5
15
FlowCenter
HP
1/6
-1/3
---1/3
--1/3
---
FLA
1.8
-3.6
---3.6
--3.6
---
Total
FLA
11.9
-18.1
---21.6
--29.8
---
With FlowCenter
Min.
Max Fuse/
Amp.
Ckt Brk*
14.2
20
--21.3
30
------25.5
40
----35.6
55
-----
Total
FLA
25.8
-33.5
--
With FlowCenter
Min.
Max Fuse/
Amp.
Ckt Brk*
29.7
45
--39.3
60
---
Ultra Forced Air Models (-UxVx) – (*HCAR-type circuit breaker per NEC)
Model
370/371
470/471
Voltage
Phase
Frequency (Hz)
208/230-1, 60
208/230-3, 60
208/230-1, 60
208/230-3, 60
Compressor
RLA
15.4
11.5
23.1
16.0
LRA
83
77
134
91
Blower
HP
3/4
3/4
3/4
3/4
FLA
6.8
6.8
6.8
6.8
Without FlowCenter
Total
Min.
Max
FLA
Amp.
Fuse
---18.3
21.2
30
---22.8
26.8
40
FlowCenter
HP
1/3
-1/3
--
FLA
3.6
-3.6
--
18
XVIII. Correction Factors
EV Entering Air Temperature
ENTERING
AIR TEMP
60oF DB
65oF DB
70oF DB
75oF DB/63oF WB
80oF DB/67oF WB
85oF DB/71oF WB
HEATING
BTU/hr
KW
1.04
0.96
1.02
0.98
1.00
1.00
0.97
1.03
0.93
1.07
---
EV Airflow
COOLING
BTU/hr
KW
--0.70
0.73
0.79
0.83
0.90
0.92
1.00
1.00
1.05
1.04
NOMINAL
CFM
80%
85%
90%
95%
100%
105%
110%
HEATING
BTU/hr
KW
0.92
1.04
0.95
1.03
0.97
1.02
0.99
1.01
1.00
1.00
1.01
0.99
1.02
0.98
COOLING
BTU/hr
KW
0.96
0.97
0.97
0.98
0.98
0.98
0.99
0.99
1.00
1.00
1.01
1.01
1.02
1.02
Ground Side Flow Rates
NOMINAL
GPM
50%
55%
60%
65%
70%
80%
90%
100%
110%
120%
130%
140%
150%
HEATING
BTU/hr
KW
0.90
0.97
0.91
0.97
0.92
0.98
0.93
0.98
0.94
0.98
0.96
0.99
0.98
0.99
1.00
1.00
1.02
1.00
1.04
1.00
1.06
1.01
1.07
1.01
1.08
1.02
COOLING
BTU/hr
KW
0.97
1.05
0.97
1.05
0.98
1.04
0.98
1.04
0.98
1.03
0.99
1.02
0.99
1.01
1.00
1.00
1.01
0.99
1.02
0.98
1.02
0.98
1.03
0.97
1.03
0.96
Water Coil Pressure Drop Ratings (Pure Water)*
EV17
EH17
Flow
GPM
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
20
22
24
26
28
30
32
34
EV27
EH27
EV37
EH37
EV38
EH38
EV47
EH47
EV48
EH48
EV57
EH57
EV58
EH58
EV67
EH67
EV68
EH68
GH87
GH110
3.8
4.6
5.3
6.1
7.0
9.0
10.2
-
2.3
2.8
3.3
3.8
4.3
4.9
5.6
6.3
7.0
-
2.3
2.8
3.3
3.8
4.3
4.9
5.6
6.3
7.0
-
0.8
0.9
1.0
1.2
1.5
1.7
2.0
2.3
2.6
2.9
3.3
0.8
0.9
1.0
1.2
1.5
1.7
2.0
2.3
2.6
2.9
3.3
dP PSIG
0.9
0.9
1.5
2.2
3.5
3.9
5.2
6.5
-
0.8
1.2
1.6
2.4
2.8
3.6
4.4
5.2
6.4
7.6
-
0.8
1.2
1.6
2.4
2.8
3.6
4.4
5.2
6.4
7.6
-
0.8
1.2
1.6
2.4
2.8
3.6
4.4
5.2
6.4
7.6
-
1.6
2.0
2.5
3.1
3.8
4.3
4.8
6.0
7.5
9.4
-
1.6
2.0
2.5
3.1
3.8
4.3
4.8
6.0
7.5
9.4
-
3.8
4.6
5.3
6.1
7.0
9.0
10.2
-
19
XIX. Wiring Diagram – Ultra Forced Air Models [E(V,H)17-67x-x-UxOx]
BRN
BRN
Heat Pump Thermostat
YEL
Optional
Slide-In Heater
E R G O Y Aux L C
PB
Fan
Motor
X W2 E
BLK
BLU
RED
Blu
RED
BLK
Wht
B
Brn
B
R
R
BF
PB
H
BLU
W2 E
DO
M
Blower
Capacitor
BLK
Equipment
Ground
L
RED
Y E W2
E R G O Y W2 L X
24V Transf
PWR
SP
J1
R
ORG 240V
208V RED
F1
J2
Yel
X
1-Phase
Power
Blu
BLK
BLK
J3
X
RB
R
ASC
Blu
X
SA
BLK
Controller
Blu
RC
O
X
PA
Blu
X
LP/
FP
DT
M1
Grn
G
HP
Yel
M1
BLK
Blu
Org
10VA Maximum
External Connected
Load (24Vac)
Blu
R
Blk
Blk
VR
F2
FREEZE 1
STAT
(Optional)
2
S
C
Blu
3
BLU
RED
HL
Blu
COMPRESSOR
LP / FP
HP
Desuperheater
Pump (Optional)
Three Phase
Factory Low Voltage
Factory Line Voltage
Field Line Voltage
Field Low Voltage
Ultra [(T,U)xOx] Heat Pump
Electrical Diagram
80-0010, U ECN 13-129-N01
BF
DO
DT
F1
F2
FP
Block, Fan Speed
Dry Contact Output
Discharge Thermostat
Fuse, Transformer
Fuse, Desuperheater
Freeze Protection
HL
HP
LP
M1
PA
High-Temp Limit
High-Press Switch
Low-Press Switch
Contactor
Plug, Accessory
PB
RB
RC
SA
Plug, Blower
Relay, Blower
Run Capacitor
Start Assist (Some
Single Phase Models)
To PumpPAK
(Optional)
M1
B
U
B
K
SP
VR
J1
J2
J3
Spare Fuse
Valve, Reversing
Remove for Hydronic
Ties W2 to E
Overflow Protection
R
D
L2
L1
L3
COMPRESSOR
20
Wiring Diagram – Ultra Forced Air Models [E(V,H)37-67x-x-UxVx]
9GRN
DC
Blower
Motor
Heat Pump Thermostat
Optional
E R G O Y Aux L C
Slide-In Heater
9 10 11 12 13 14 15 16
1 2 3 4 5 6 7 8
X W2 E
1
2
3
4
5
3GRN
2RED
12WHT/
BLU
4RED
5WHT/BLU
Brn
10ORG
Wht
3WHT/RED
2GRN/RED
Blu
1BLK
Equipment
Ground
6GRN/BLU
8BLK
10WHT
W2 E
DO
R
A B C D A B C D A B C D
LOW
Y E W2
Adjust
HIGH
MED
1-Phase
Power
-
+
E R G O Y W2 L X
24V Transf
PWR
SP
J1
Yel
X
Blu
ORN 240V
208V RED
F1
J2
R
BLK
J3
X
ASC
11BLU
Red
R
X
SA
Blu
Controller
RC
O
X
PA
Blu
X
LP/
FP
DT
HP
M1
G
Grn
M1
Yel
BLK
Blu
Org
10VA Maximum
External Connected
Load (24Vac)
Blu
FREEZE
STAT
(Optional)
Blk
R
Blk
VR
Blu
2
S
C
HP
Blu
LP / FP
Ultra (UxVx) Heat Pump
Electrical Diagram
80-0053, F ECN 13-129-N01
F2
HL
3
1
BLU
RED
COMPRESSOR
Desuperheater
Pump (Optional)
Factory Low Voltage
Factory Line Voltage
Field Line Voltage
Field Low Voltage
To FlowCenter
(Optional)
Three Phase
M1
DO
DT
F1
F2
FP
HL
HP
LP
M1
Dry Contact Output
Discharge Thermostat
Fuse, Transformer
Fuse, Desuperheater
Freeze Protection
High-Temp Limit
High-Press Switch
Low-Press Switch
Contactor
PA Plug, Accessory
RC Run Capacitor
SA Start Assist (Some
Single Ph Models)
SP Spare Fuse
VR Valve, Reversing
J1 Remove for Hydronic
J2 Ties W2 to E
J3 Overflow Protection
BLOWER SPEEDS
A = 67 or 77 Series
B = 57 Series
C = 47 Series
D = 37 Series
+ = Incr CFM 10%
- = Decr CFM 10%
BLOWER MOTOR CONTROL WIRES
1 – 11BLU (X)
11 – 5WHT/BLU (Hi)
2 – 10WHT (W2)
12 – 4RED (R)
3 – 12WHT/BLU (X) 13 – 8BLK (E)
4 – 2GRN/RED (Md) 14 – 6GRN/BLU (Y)
5 – 3WHT/RED (Lo) 15 – 9GRN (G)
7 – 10ORG (+ / -)
B
U
B
K
R
D
L2
L1
L3
COMPRESSOR
21
XX. TROUBLESHOOTING GUIDE FOR LOCKOUT CONDITIONS
If the heat pump goes into lockout on a high or low pressure switch, the cause of the lockout can be narrowed down by
knowing the operating mode and which pressure switch the unit locked out on. The following table will help track down the
problem once this information is known. Note- A lockout condition is a result of the heat pump shutting itself off to protect
itself, never bypass the lockout circuit. Serious damage can be caused by the system operating without lockout protection.
CONDITION
AC power applied
AC power applied
AC power applied
Run cycle complete
INDICATOR LIGHTS
COMMENTS
PWR ASC LP
HP
Off
Off
Off
Off Blown fuse or power removed or loose fuse clips.
X
X
ASC indicator on for 4' 35" on power initialization.
X
Power applied - unit running or waiting for a call to run.
X
X
LOW PRESSURE INDICATOR
Heating or Cooling –
X
X
before Y call
X
X
Heating - during Y call
X
Cooling - during Y call
X
22
Flash
-Check if Low Pressure switch is open.
-Check electrical connections between Low Pressure switch and Controller.
-Loss/lack of flow through ground-side heat exchanger.
-Low fluid temperature operation in ground-side heat exchanger.
-Freezing fluid in ground-side heat exchanger (lack of antifreeze).
-Dirty (fouled) ground-side heat exchanger (on ground water systems).
-Low ambient temperature at the heat pump.
-Undercharged / overcharged refrigerant circuit.
-Expansion valve / sensing bulb malfunction.
-Excessive low return air temperature.
-Freezing air coil (dirty air filter or air coil, undercharged refrigerant circuit)
-Missing blower compartment access panel.
-Loss/lack of airflow (dirty filter, closed vents, blower, restricted ductwork,
etc.)
-Low return air temperature.
-Low ambient temperature at the heat pump.
-Undercharged / overcharged refrigerant circuit.
-Expansion valve / sensing bulb malfunction.
-Excessively low fluid temperature in the ground side heat exchanger.
X
Cycle Blink
On
and
Off
every
few
min.
HIGH PRESSURE INDICATOR
Heating or Cooling –
X
before Y call
X
X
Heating - during Y call
Cooling – during Y call
ASC indicator ON for 70 to 130 seconds after compressor shutdown.
X
X
X
X
-Check if High Pressure switch is open.
-Check electrical connections between High Pressure switch and Controller.
-Missing blower compartment access panel.
-Loss/lack of airflow (dirty filter, closed vents, blower, restricted ductwork,
etc.)
-High return air temperatures.
-Overcharged refrigerant circuit.
-Expansion valve / sensing bulb malfunction.
-Dirty (fouled) air coil.
-Loss/lack of flow through the ground-side heat exchanger.
-High fluid temperature in the ground-side heat exchanger.
-Dirty (fouled) ground-side heat exchanger (on ground water systems).
-Overcharged refrigerant circuit.
-Expansion valve / sensing bulb malfunction.
XXI. TROUBLESHOOTING GUIDE FOR UNIT OPERATION
PROBLEM
POSSIBLE CAUSE
Blown Fuse/Tripped Circuit
Breaker
Blown Fuse on Controller
Broken or Loose Wires
Voltage Supply Low
Low Voltage Circuit
Entire unit
does not run Room Thermostat
Unit will not
operate on
“heating”
Evaporator
(air coil) ices
over in
cooling mode
Blower motor
runs but
compressor
does not, or
compressor
short cycles
Unit short
cycles
CHECKS AND CORRECTIONS
Replace fuse or reset circuit breaker. (Check for correct size fuse or circuit breaker.)
Replace fuse on controller. (Check for correct size fuse.) Check for loose fuse clips.
Replace or tighten the wires.
If voltage is below minimum voltage on data plate, contact local power company.
Check 24-volt transformer and fuse for burnout or voltage less than 18 volts.
Set thermostat on “Cool” and lowest temperature setting, unit should run. Set
thermostat on “Heat” and highest temperature setting, unit should run. If unit does not
run in both cases, the room thermostat could be faulty or incorrectly wired. To prove
faulty or miswired thermostat, disconnect thermostat wires at the unit and jumper
between “R”, “Y” and “G” terminals and unit should run. Replace thermostat only with
correct heat pump thermostat. A substitute may not work properly.
Interruptible Power
Check incoming supply voltage.
Dirty Filter
Check filter. Clean or replace if found dirty.
Thermostat Improperly Set
Is it below room temperature? Check the thermostat setting.
Defective Thermostat
Check thermostat operation. Replace if found defective.
Incorrect Wiring
Check for broken, loose, or incorrect wires.
Blower Motor Defective
If it does not operate the compressor will go off on high head pressure.
Dirty Air Filter or Air Coil
Check filter. Clean or replace if found dirty. Clean air coil if found dirty.
Airflow
Lack of adequate airflow or improper distribution of air. Check the motor speed and
duct sizing. Check the filter, it should be inspected every month and changed if dirty.
Check for closed registers. Remove or add resistance accordingly.
Blower Speed Set too Low
Verify blower speed jumpers are in factory settings.
Low Air Temperature
Room temperatures below 65oF may ice over the evaporator.
Room Thermostat
Check setting, calibration, and wiring.
Wiring
Check for loose or broken wires at compressor, capacitor, or contactor.
Blown Fuse
Replace fuse or reset circuit breaker. (Check for correct size fuse or circuit breaker.)
High or Low Pressure Controls The unit could be off on the high or low-pressure cutout control. Check water GPM, air
CFM and filter, ambient temperature and loss of refrigerant. If the unit still fails to run,
check for faulty pressure controls individually. Replace if defective.
Voltage Supply Low
If voltage is below minimum voltage specified on the data plate, contact local power
company. Check voltage at compressor for possible open terminal.
Low Voltage Circuit
Check transformer and fuse for burn out or voltage less that 18 volts. With a voltmeter,
check signal from thermostat at Y to X, M1 on controller to X, check for 24 volts
across the compressor contactor. Replace component that does not energize.
Compressor Overload Open
In all cases an “internal” compressor overload is used. If the compressor motor is too
hot, the overload will not reset until the compressor cools down.
Compressor Motor Shorted to Internal winding grounded to the compressor shell. Replace the compressor. If
Ground
compressor burnout, replace inline filter drier.
Compressor Windings Open
Check continuity of the compressor windings with an ohmmeter. If the windings are
open, replace the compressor.
Seized Compressor
Try an auxiliary capacitor in parallel with the run capacitor momentarily. If the
compressor still does not start, replace it.
Room Thermostat
Improperly located thermostat (e.g. near kitchen, inaccurately sensing the comfort level
in living areas). Verify Install Set-up configuration.
Wiring and Controls
Loose wiring connections, or control contactor defective.
Compressor Overload
Defective compressor overload, check and replace if necessary. If the compressor runs
too hot, it may be due to insufficient refrigerant charge.
PROBLEM
POSSIBLE CAUSE
CHECKS AND CORRECTIONS
Unit does not Reversing Valve does not Shift Defective solenoid valve will not energize. Replace solenoid coil.
cool (Heats
Only)
Room Thermostat
Ensure that it is properly configured according to their own instructions for the
“System Type” they are installed on.
Reversing Valve does not
The solenoid valve is de-energized due to miswiring at the unit or thermostat - correct
Shift, the Valve is Stuck
wiring. Replace if valve is tight or frozen and will not move. Switch from heating to
cooling a few times to loosen valve.
23
Insufficient
cooling or
heating
Water
Lack of sufficient pressure, temperature and/or quantity of water.
Unit Undersized
Recalculate heat gains or losses for space to be conditioned. If excessive, rectify by
adding insulation, shading, etc.
Check for leaks in ductwork or introduction of ambient air through doors/windows
Loss of Conditioned Air by
Leaks
Room Thermostat
Water drips
from unit
Noisy
Operation
24
Improperly located thermostat (e.g. near kitchen, not sensing the comfort level in living
areas). Verify Install Set-up configuration.
Airflow
Lack of adequate airflow or improper distribution of air. Check the motor speed and
duct sizing. Check the filter, it should be inspected every month and cleaned if dirty.
Remove or add resistance accordingly.
Refrigerant Charge
Low on refrigerant charge causing inefficient operation. Adjust only after checking
CFM,GPM, and inlet/outlet temperatures.
Compressor
Check for defective compressor. If discharge pressure is too low and suction pressure
is too high, compressor is not pumping properly. Replace compressor.
Desuperheater
The desuperheater circuit (in-line fuse) should be disconnected during cold weather to
allow full heating load to the house.
Reversing Valve
Defective reversing valve creating bypass of refrigerant from discharge to suction side
of compressor. When it is necessary to replace the reversing valve, wrap it with a wet
cloth and direct the heat away. Excessive heat can damage the valve.
Unit not Level
Level vertical units.
Condensate Drain Line Kinked Clean condensate drain. Make sure external condensate drain is installed with adequate
or Plugged
drop and pitch.
Compressor
Make sure the compressor is not in direct contact with the base or sides of the cabinet.
Cold surroundings can cause liquid slugging, increase ambient temperature.
Blower and Blower Motor
Blower wheel hitting the casing, adjust for clearance and alignment. Bent blower,
check and replace if damaged. Loose blower wheel on shaft, check and tighten.
Contactor
A “clattering” or “humming” noise in the contactor could be due to control voltage less
than 18 volts. Check for low supply voltage, low transformer output, or transformer tap
setting. If the contactor contacts are pitted or corroded or coil is defective, repair or
replace.
Rattles and Vibrations
Check for loose screws, panels, or internal components. Tighten and secure. Copper
piping could be hitting the metal surfaces. Carefully readjust by bending slightly.
Check that hard plumbing is isolated from building structures.
Water and Airborne Noises
Undersized ductwork will cause high airflow velocities and noisy operation. Excessive
water through the water-cooled heat exchanger will cause a squealing sound. Check the
water flow, ensuring adequate flow for good operation but eliminating the noise.
Cavitating Pumps
Purge air from ground loop system.
Squealing Sound from Inside Purge air from the water side of the desuperheater heat exchanger or defective
the Cabinet
desuperheater heat exchanger.
XXII. TROUBLESHOOTING GUIDE FOR ECM BLOWER
PROBLEM
Motor rocks slightly
when starting
Motor won’t start
•No movement
CHECKS AND CORRECTIONS
•This is normal start-up for ECM.
•Wait for completion of ramp-up at start.
•Check power at motor.
•Check low voltage (24 VAC R to X) at motor.
•Check low voltage connections (G, Y, W2, R, X) at motor.
•Check for unseated pins in connectors on motor harness.
•Test with a temporary jumper between R and G.
•Check motor for a tight shaft.
•Perform Moisture Check*.
Motor rocks, but won’t
start
•Check for loose or compliant motor mount.
•Make sure blower wheel is tight on shaft.
Motor starts, but runs
erratically
•Varies up and down
or intermittent
•Is ductwork attached?
•Check line voltage for variation or “sag.”
•Check low voltage connections (G, Y, W2, R, X) at motor, unseated pins in motor harness connectors.
•Check out system controls, thermostat.
•Perform Moisture Check*.
”Hunts” or “puffs” at
high CFM (speed)
•Does removing panel or filter reduce puffing?
Reduce restriction.
Stays at low CFM
despite call for higher
speed
•Check low voltage wires and connections.
•Verify fan is not in delay mode; wait until delay complete.
•”R” missing/not connected at motor.
Stays at high CFM
•Verify fan is not in delay mode; wait until delay complete.
•”R” missing/not connected at motor.
Blower won’t change
CFM after adjusting
the speed control
setting.
Blower won’t shut off
•Power to the unit must be reset to enable the new settings.
•Verify fan is not in delay mode; wait until delay complete.
•”R” missing/not connected at motor.
Excessive noise
•Determine if it’s air noise, cabinet, duct or motor noise.
Air noise
•High static creating high blower speed?
- Does removing filter cause blower to slow down? Check filter.
- Use low-pressure drop filter.
Check/correct duct restrictions.
Noisy blower or
cabinet
•Check for loose blower housing, panels, etc.
•High static creating high blower speed?
- Check for air whistling through seams in ducts, cabinets, or panels.
Check for cabinet/duct deformation.
•Current leakage from controls into G, Y, or W?
*Moisture Check
•Connectors are oriented as recommended by equipment manufacturer?
•Is condensate drain plugged?
•Check for low airflow (too much latent capacity)
•Check for undercharged conditions.
•Check and plug leaks in return ducts, cabinet.
**Comfort Check
•Check proper airflow settings.
•Low static pressure for low noise.
•Set low continuous-fan CFM.
•Thermostat in good location?
25
XXIII. ADDITIONAL FIGURES
Figure 2 – Electrical Diagram for optional ECONAR Intelligent Slide-In-Heater
IN
Pressure/Temperature
(P/T) Ports
Out
PumpPAK
To/From
Closed Loop
Figure 3 – Ground Loop Water Plumbing
From Bladder-Type
Pressure Tank
Shutoff
Valves
Boiler
Drains
Strainer
IN
Visual Flow
Meter
Solenoid
Valve
Flow Control
Valve
Out
Pressure/Temperature
(P/T) Ports
Discharge
Figure 4 – Ground Water Plumbing
26
COLD
HOT
1/2" or 3/4"
Copper Pipe
Air Vent
1/2" Copper Pipe
Desuperheater Tee
Shutoff Valves
Drain (Hang Down)
Note – Always use copper pipe. Check local codes and use proper plumbing procedures.
Figure 5 – Preferred Desuperheater Installation
COLD
Check Valve
HOT
1/2" or 3/4"
Copper Pipe
Air Vent
Drain (Hang Down)
1/2" Copper Pipe
Shutoff Valves
Note – Always use copper pipe. Check local codes and use proper plumbing procedures.
Figure 6 – Alternate Desuperheater Installation
27
WARRANTY AND FORMS
SINGLE FAMILY OWNER OCCUPIED WARRANTY CERTIFICATE
Enertech Global, LLC., for brands: “ECONAR” and “GeoSource” Residential Single Family, Owner Occupied
5-YEAR LIMITED WARRANTY STARTING JANUARY 01, 2013
Enertech Global, LLC. warrants all internal system components, including but not limited to the compressor, coaxial exchanger, air coil, contactor,
circuit boards, capacitor, wiring harnesses, blower assembly, expansion valve and reversing valve, to be free from defects in material and
workmanship for a period of five (5) year from the date of delivery to the original purchaser- user. Enertech Global, LLC. warrants its geothermal unit
against defect in materials and workmanship for FIVE (5) year from the date of delivery to the original purchaser-user.
CONDITIONS AND EXCLUSIONS:
The Limited Warranty only applies if the following conditions are met:
A. This Limited Warranty will not apply and shall be null and void if the Enertech Global, LLC. serial number has been altered, defaced or removed.
B.
This Limited Warranty shall be null and void if the Enertech Global, LLC. unit has been disconnected or removed from the location of original
installation, or if dealer-seller has not been
paid in full for the unit.
C. This Limited Warranty shall not apply to unit failure or defect caused by improper installation, field modification, improper voltage, improper
maintenance or misuse including operation during building construction, corrosion caused by airborne contaminants, chlorine or salt air
exposure, corrosive liquids or water, abuse, neglect, Act of God, outdoor installation, damage from abuse, accident, fire, flood and the like, or
to defects or damage caused by the use of any attachment, accessory or component not authorized by Enertech Global, LLC.
D. Replacement or repaired parts and components are warranted only for the remainder of the original warranty period, as stated above.
E. This Limited Warranty applies only to Enertech Global, LLC. commercial and/or muti-family use (i.e. non-residential-single-family) units sold
and installed by a trained, independent, contractor-customer of Enertech Global, LLC., or an authorized representative and/or distributor, in the
United States or Canada, and subjected to normal usage as described and rated on the applicable descriptive sheet for such unit. This warranty
shall not be valid if equipment is not installed in accordance with methods prescribed in our data and technical manuals and in compliance with
local codes. Improper installation may endanger the occupants of the dwelling. Contractor-customer must complete the warranty registration card
supplied
with the Enertech Global, LLC. unit, which must then be endorsed by original purchaser-user and mailed within ten (10) days after initial
installation. If warranty card is not returned,
warranty shall commence at date unit was shipped from Enertech Global, LLC.
F.
The obligation for Enertech Global, LLC. under this Limited Warranty is expressly limited to replacement of any parts or components as
specified and found within the cabinet. Enertech Global, LLC. reserves the right to replace defective components under warranty with new or
reconditioned parts. This warranty does not cover any labor expenses for service, nor for removing or reinstalling parts. Accessory, peripheral
and ancillary parts and equipment or not covered by this warranty.
G. Enertech Global, LLC. does not warrant equipment which has been custom built or modified to purchaser-user specifications. Likewise, any field
modification of any equipment shall
also void this, and any and all warranties.
H.
Regular maintenance such as filter changes, drain pan cleaning, loop flushing/pressurization, and other monthly/annual maintenance is not
covered.
I.
All warranty claim items must be held for 90 days at customer location and returned to Enertech freight prepaid upon issuance of RMA by
Warranty Administration.
Notice: Outdoor or unconditioned space installation of any equipment other than units intended for outdoor installation shall cause this and all
warranties to be deemed void.
SHIPPING COSTS: The purchaser-user will be responsible for the cost of shipping warranty replacement parts from the Enertech Global,
LLC. factory to the distributor of the parts. Purchaser-user is also responsible for any shipping cost of returning the failed part to the
distributor.
THE FOREGOING LIMITED WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES (AND IMPLIED CONDITIONS IN cANADA),
EXPRESSED, IMPLIED AND STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND ALL SUCH WARRANTIES, EXPRESSED OR IMPLIED, ARE
EXCLUDED AND SHALL NOT APPLY TO THE GOODS SOLD. IN NO EVENT SHALL WARRANTOR BE LIABLE FOR DIRECT,
INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM ANY DEFECT IN THE GOODS EXCEPT TO THE
EXTENT SET FORTH HEREIN.
(Some states do not allow exclusion or limitation of implied warranties or liability for incidental or consequential damage). For additional information or
assistance, contact the
WARRANTOR, which is: Enertech Global, LLC., 2506 South Elm Street, Greenville, IL 62246
Page 1 of 1
Greenville, IL & Mitchell, SD
[email protected]
www.gogogeo.com
90-1201 Rev D (2013-007) | 2012 Enertech Global, LLC. | All Rights Reserved