Installation Manual - HA/HB 300-600(11/06)

Transcription

INSTALLATION
MANUAL
SPLIT-SYSTEM
CONDENSING UNITS
(AIR COOLED)
CONTENTS
GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 5
AGENCY APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . 5
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
MODELS:
HA300 - 25 Ton
HB360 - 30 Ton
HB480 - 40 Ton
HB600 - 50 Ton
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
See the following page for a complete Table of Contents.
NOTES, CAUTIONS AND WARNINGS
Installer should pay particular attention to the words:
NOTE, CAUTION, and WARNING. Notes are intended to
clarify or make the installation easier. Cautions are given
to prevent equipment damage. Warnings are given to
alert installer that personal injury and/or equipment damage may result if installation procedure is not handled
properly.
CAUTION: READ ALL SAFETY GUIDES BEFORE
YOU BEGIN TO INSTALL UNIT.
SAVE THIS MANUAL
278805-YIM-A-1106
278805-YIM-A-1106
TABLE OF CONTENTS
LIST OF FIGURES
NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Fig. #
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . 5
REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1
CORNER WEIGHTS & CENTER OF GRAVITY . . . . . 7
2
TYPICAL RIGGING . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
AGENCY APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3
TYPICAL FIELD WIRING DIAGRAM - HA 300 UNIT . 15
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
LIMITATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
TYPICAL FIELD WIRING DIAGRAM - HB 360, 480,
600 UNITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5
TYPICAL LIQUID LINE SOLENOID WIRING . . . . . . 17
6
HA/HB UNIT DIMENSIONS . . . . . . . . . . . . . . . . . . . . 18
ROOFTOP LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
GROUND LEVEL LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 7
7
25, 30 & 40 TON POWER AND CONTROL WIRING
CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8
50 TON POWER AND CONTROL WIRING
CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
9
25 TON PIPING CONNECTIONS . . . . . . . . . . . . . . . 20
CLEARANCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
RIGGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
POWER WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
PHASING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
CONTROL WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
COMPRESSOR CRANKCASE HEATERS . . . . . . . . . . . . 9
REFRIGERANT MAINS . . . . . . . . . . . . . . . . . . . . . . . . . 10
LINE SIZING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
SERVICE VALVES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
EVACUATION AND CHARGING . . . . . . . . . . . . . . . . . . 12
PIPING AND ELECTRICAL CONNECTIONS . . . . . . . . . 18
PIPING AND ELECTRICAL CONNECTION SIZES . . . . 20
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
CRANKCASE HEATER . . . . . . . . . . . . . . . . . . . . . . . . . 22
PRE-START CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
INITIAL START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . . 22
OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
PUMP OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
CONTINUOUS BLOWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
INTERMITTENT BLOWER . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
COOLING SEQUENCE OF OPERATION . . . . . . . . . . . . . . . 24
FLASH CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Pg. #
10 30 & 40 TON PIPING CONNECTIONS . . . . . . . . . . . 21
11 50 TON PIPING CONNECTIONS . . . . . . . . . . . . . . . 21
12 UNIT CONTROL BOARD . . . . . . . . . . . . . . . . . . . . . . 25
13 FAN ORIENTATION CONTROL BOX END . . . . . . . . 26
14 25 TON CHARGING CHART . . . . . . . . . . . . . . . . . . . 27
18 TYPICAL 25 TON CONDENSER UNIT WIRING
DIAGRAM - 208/230-3-60 . . . . . . . . . . . . . . . . . . . . . 30
DIAGRAM - 460-3-60, 575-3-60 . . . . . . . . . . . . . . . . . 31
20 TYPICAL 30 OR 40 TON CONDENSING UNIT WIRING
DIAGRAM - 208/230-3-60 . . . . . . . . . . . . . . . . . . . . . 32
21 TYPICAL 30 OR 40 TON CONDENSING UNIT WIRING
DIAGRAM - 460-3-60, 575-3-60 . . . . . . . . . . . . . . . . . 33
DIAGRAM - 208/230-3-60 . . . . . . . . . . . . . . . . . . . . . 34
DIAGRAM - 460-3-60, 575-3-60 . . . . . . . . . . . . . . . . . 35
UNIT CONTROL BOARD OPTION SETUP . . . . . . . . . . 26
OPTION BYTE SETUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
CONDENSER FAN OPERATION . . . . . . . . . . . . . . . . . . 26
OPERATION WITH A TWO-STAGE THERMOSTAT . . . 26
OPERATION WITH A FOUR-STAGE THERMOSTAT . . 26
SECURE OWNER'S APPROVAL . . . . . . . . . . . . . . . . . . 26
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
CLEANING CONDENSER SURFACE . . . . . . . . . . . . . . 27
LUBRICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
COMPRESSOR REPLACEMENT . . . . . . . . . . . . . . . . . 27
2
Unitary Products Group
278805-YIM-A-1106
TABLE OF CONTENTS - Con’t.
LIST OF TABLES
Tbl. #
Pg. #
Tbl. #
Pg. #
1
PHYSICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
9
2
UNIT APPLICATION DATA . . . . . . . . . . . . . . . . . . . . . 6
3
CORNER WEIGHTS & CENTER OF GRAVITY
(INCHES) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
10 PIPING AND ELECTRICAL CONNECTION SIZES (25T)
(INCHES) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4
MINIMUM CLEARANCES . . . . . . . . . . . . . . . . . . . . . . 8
5
ELECTRICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6
SUCTION LINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7
LIQUID LINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8
R-22 LINE CHARGE . . . . . . . . . . . . . . . . . . . . . . . . . 14
UNIT DIMENSIONS (INCHES) . . . . . . . . . . . . . . . . . 18
11 PIPING AND ELECTRICAL CONNECTION SIZES (30/
40/50T) (INCHES) . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
12 ELECTRICAL POWER KNOCKOUT SIZES
(INCHES) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
13 UNIT CONTROL BOARD FLASH CODES . . . . . . . . 25
3
278805-YIM-A-1106
NOMENCLATURE
PRODUCT NOMENCLATURE
YORK OUTDOOR SPLIT CONDENSING UNITS
H A 300 C 00 A 2 A AA 2
Model Number
Description
Options
H
Product Category
H = Air Conditioner Split System
A
Product Identifier
A = R-22 Standard Efficiency 2-Pipe
B = R-22 Standard Efficiency 4-Pipe
300
Nominal Cooling
Capacity
MBH
300 = 25 Ton
360 = 30 Ton
480 = 40 Ton
600 = 50 Ton
C
Heat Type
C = Cooling Only
00
Nominal Heating
Capacity
00 = No Heat Installed
A
Airflow Options
A = Standard Motor
2
Voltage
2 = 208/230-3-60
4 = 460-3-60
5 = 575-3-60
A
Installation Options
A = None
B = Disconnect
C = Service Valves
D = Service Valves + Disconnect
AA
Additional Options
AA = None
AC = Technicoated Coil
2
Product Generation
1 = 1st Generation
Model #
2 = 2nd Generation
NOTE: HB models are designed for 4-Pipe (dual)
applications only. 4-Pipe condensing units cannot be matched with one single 2-Pipe air handler.
4
278805-YIM-A-1106
GENERAL
These condensing units are designed for outdoor
installation on a roof or at ground level. Every unit is
completely piped and wired at the factory and is
shipped ready for immediate installation. Only the liquid and suction lines to the evaporator coil, the filter
drier, the control wiring and the main power wiring are
required to complete the installation. Each unit is dehydrated, evacuated, leak tested and pressure tested at
450 psig before being pressurized with a holding
charge of refrigerant-22 for shipment and/or storage.
All controls are located in the front of the unit and are
readily accessible for maintenance, adjustment and
service. All wiring (power and control) can be made
through the front of the unit.
SAFETY CONSIDERATIONS
Installer should pay particular attention to the words:
NOTE, CAUTION, and WARNING. Notes are intended
to clarify or make the installation easier. Cautions are
given to prevent equipment damage. Warnings are
given to alert installer that personal injury and/or equipment damage may result if installation procedure is not
handled properly.
This product must be installed in strict compliance with the enclosed installation instructions
and any applicable local, state, and national
codes including but not limited to, building,
electrical and mechanical codes.
REFERENCE
This instruction covers the installation and operation of
the basic condensing unit. For information on the
installation and operation of the evaporator blower
units, refer to instruction Form No. 035-18496-000.
All accessories come with a separate Installation Manual.
Refer to Parts Manual for complete listing of replacement parts on this equipment.
AGENCY APPROVALS
Design certified by ETL as follows:
1. For use as a cooling unit.
2. For outdoor installation only.
INSPECTION
Improper installation may create a condition
where the operation of the product could cause
personal injury or property damage.
Improper installation, adjustment, alteration,
service or maintenance can cause injury or
property damage. Refer to this manual for
assistance or additional information, consult a
qualified installer or service agency.
As soon as a unit is received, it should be inspected for
possible damage during transit. If damage is evident,
the extent of the damage should be noted on the carrier’s freight bill. A separate request for inspection by
the carrier’s agent should be made in writing.
5
278805-YIM-A-1106
TABLE 1: PHYSICAL DATA
Condenser
Compressor1
Model
HA/HB
Fan (Propeller)
Fan Motor Coil (Copper Tube-Aluminum Fin)
Nominal Capacity
Pitch Nom.
Capacity Stages Qty. Dia. Deg. CFM RPM
(tons)
300
HP
Face
Coil Tube Fins
Area Rows Width OD per
Deep
(In.) (In.) inch
(Ft.2)
Unit Weight
(Lbs.)
Shipping
Charge, R-22
Opera- Operation3 Holding
tion
(Lbs.-Oz.) (Lbs.)
25
2
4
24
34
23244
1.25
50
60
1608
1658
49.65
1.0
System 1
15
2
2
24
36
12690
1.25
25
60
1730
1790
30.08
1.0
System 2
15
2
2
24
36
12690
1.25
25
60
System 1
20
2
2
30
22
15414
1.50 32.5
78
System 2
20
2
2
30
22
15414
1.50 32.5
78
System 1
25
2
2
30
26
19386
1.50
52
78
System 2
25
2
2
30
26
19386
1.50
52
78
360
30.08
480
1140
2
3/8
16
1961
2037
37.83
1.0
37.83
600
1.
2470
2563
46.59
1.0
46.59
All compressors are Copeland Scrolls.
2. One
of the fan motors is controlled by a pressure switch and will not operate until system pressure reaches 280 psig and drops
below 180 psig.
3.
The total operating charge of the condensing unit, matching indoor unit and 25 feet of interconnecting piping.
INSTALLATION
TABLE 2: UNIT APPLICATION DATA
Voltage Variation1
Min. / Max.
208/230-3-60
187/252
460-3-60
432/504
575-3-60
540/630
Ambient Air on Condenser Coil
Min. /Max.
40°F/125°F2
Suction Pressure at Compressor and
57.5 psig / 92.6 psig
Corresponding Temp. at Saturation
32.0 ºF / 55.0 ºF
Min. / Max.
6
1.
Utilization range “A” in accordance with ARI Standard
110.
2.
These units can operate in an ambient temperature of
125°F providing the wet bulb temperature of the air
entering the evaporator coil does not exceed 67°F. Unit
can operate to 0°F if equipped with a low ambient kit.
LIMITATIONS
These units must be installed in accordance with all
national and local safety codes. If no local codes apply,
installation must conform to the appropriate national
codes. Units are designed to meet National Safety
Code Standards. If components are to be added to a
unit to meet local codes, they are to be installed at the
dealer's and/or the customer's expense.
LOCATION
Use the following guidelines to select a suitable location for both the condensing unit and the evaporator.
1. The condensing unit is designed for outdoor installation only.
278805-YIM-A-1106
2. The condenser fans are the propeller type and are
not suitable for use with ductwork in the condenser
air stream.
3. The condensing unit and the evaporator should be
positioned to minimize the number of bends in the
refrigerant piping.
4. The condensing unit should be as close to the
evaporator as practical.
5. The condensing unit should not be installed where
normal operating sounds may be objectionable.
6. The evaporator should be located within the building, either outside or inside the conditioned space.
ROOFTOP LOCATIONS
Be careful not to damage the roof. Consult the building
contractor or architect if the roof is bonded. Choose a
location with adequate structural strength to support
the unit.
Minimums of two (2) beams are required to support
each unit. The beams should: (1) be positioned perpendicular to the roof joists. (2) Extend beyond the
dimensions of the section to distribute the load on the
roof. (3) Be capable of adequately supporting the concentrated loads at the corners. See Figure 1.
These beams can usually be set directly on the roof.
Flashing is not required.
NOTE: On bonded roofs, check for special installation
requirements.
GROUND LEVEL LOCATIONS
It is important that the units be installed on a substantial base that will not settle, causing strain on the refrigerant lines and possible leaks. A one-piece concrete
slab with footers that extend below the frost line is recommended. The slab should not be tied to the building
foundation, as noise will telegraph.
The condensing unit must be mounted on level supports. The supports can be channel iron beams or
wooden beams treated to reduce deterioration.
TABLE 3: CORNER WEIGHTS & CENTER OF GRAVITY (INCHES)
Unit Model
Unit Weight (Lbs.)
Shipping Operation
Unit Dimensions
(Inches)
Length
Width
110.46
88.46
A
B
C
D
Dim X
Dim Y
Weight
A to D
Weight
B to C
337
412
472
386
49.7
47.7
723.5
884.5
HA300
1608
1658
HB360
1730
1790
110.46
88.46
363
531
497
339
44.8
42.8
701.6
1028.4
HB480
1961
2037
128.46
88.46
393
598
585
385
51.0
43.8
778.5
1182.5
HB600
2470
2563
128.46
88.46
470
757
767
476
49.2
44.5
946.0
1524.0
FIGURE 1 - CORNER WEIGHTS & CENTER OF GRAVITY
7
278805-YIM-A-1106
Concrete piers can also support ground level units.
These piers should (1) extend below the frost line, (2)
be located under each of the section's four corners,
and (3) be sized to carry the load of the corner it supports.
On either rooftop or ground level installations, rubber
padding can be applied under the unit to lessen any
transmission of vibration.
Holes are provided in the base rails for bolting the unit
to its foundation.
For ground level installations, precautions should be
taken to protect the unit from tampering and unauthorized persons from injury. Screws on access panels will
prevent casual tampering. Further safety precautions
such as a fenced enclosure or locking devices on the
panels may be advisable. Check local authorities for
safety regulations.
Do not permit overhanging structures or shrubs
to obstruct condenser air discharge.
RIGGING
Exercise care when moving the unit. Do not remove
any crating until the unit is near the place of installation.
Spreaders, longer than the largest dimension
across the unit must be used across the top of
the unit.
Before lifting a unit, make sure that its weight is
distributed equally on the cables so that it will
lift evenly.
When preparing to move the unit, always determine the
center of gravity (see Table 3 and Figure 1) of the unit
in order to equally distribute the weight. Slings connected to the compressor end of a unit will usually have
to be made shorter, so the unit will lift evenly (see
Figure 2).
CLEARANCES
The units must be installed with sufficient clearance for
air to enter the condenser coil, for air discharge and for
servicing access. See Table 4 for clearances.
NOTE: Additional clearance is required to remove the
compressors out the side of the unit, unless a
means is available to lift the compressor out
through the top of the unit.
TABLE 4: MINIMUM CLEARANCES
Clearance Description
Distance in Inches
Overhead (Top)
120
Front (Access Cover)
36
Rear (piping connections)
36
Left Side
30
Right Side
30
Bottom1
0
1.
8
In all installations where snow accumulates and winter
operation is expected, additional height must be provided
to insure normal condenser airflow.
FIGURE 2 - TYPICAL RIGGING
Rig units by attaching chain or cable hooks to the holes
provided on the base rail. See Figure 7 for details on
rigging holes.
The length of the spreader bars must exceed the width
of the unit. Refer to Table 3 for unit weights.
278805-YIM-A-1106
NOTE: If planning to handle the 25-50 ton split with a
fork truck, 1WS0407 skid for HA300/HB360
and 1WS0408 skid for HB480/600 units will be
required.
If handling a unit equipped with a 1WS skid,
length of forks must be a minimum of 96”. Fork
lengths less than 96” will not span the required
width of the skid and can cause damage to the
unit’s base rails or condenser coils.
POWER WIRING
Check the available power and the unit nameplate for
like voltage. Run the necessary number of properly
sized wires to the unit. Provide a disconnect switch (if
not included with the unit) and fusing as required.
Route the conduit through the large knockout located
on the front of the electrical box. See Table 5 for Electrical Data.
The disconnect switch may be bolted to the side of the
unit but not to any of the removable panels; this would
interfere with access to the unit. Make sure that no
refrigerant lines will be punctured when mounting the
disconnect switch, and note that it must be suitable for
outdoor installation.
All power and control wiring must be in accordance with National and Local electrical codes.
START-UP
PHASING
The units are properly phased at the factory. Check for
proper compressor rotation. If the fans or compressors
rotate in the wrong direction at start-up, the electrical
connection to the unit is misphased. Change the
incoming line connection phasing to obtain proper rotation. (Scroll compressors operate in only one direction.
If the scroll is drawing low amperage, has similar suction and discharge pressures, or producing a high
noise level, the scroll is misphased.)
Scroll compressors require proper rotation to
operate correctly. Units are properly phased at
the factory. Do not change the internal wiring to
make the blower condenser fans or compressor rotate correctly.
CONTROL WIRING
Route the necessary low voltage control wires from the
Simplicity™ control board to the thermostat and also
from the low voltage condensing section control box or
the terminal block inside the evaporator unit and to the
evaporator fan motor controller. Refer to Figures 3 and
4 for field wiring diagrams. A terminal block is provided
in the evaporator control box to accommodate the wiring from the evaporator solenoid valves.
COMPRESSOR CRANKCASE HEATERS
The compressors are equipped with crankcase heaters
to prevent the migration of refrigerant to the compressors. The heaters are energized only when the unit is
not running.
If the main switch is disconnected for long periods of
shut down, do not attempt to start the unit for 8 hours
after the switch has been re-connected. This will allow
sufficient time for all liquid refrigerant to be driven out of
the compressor.
9
278805-YIM-A-1106
TABLE 5: ELECTRICAL DATA
Unit Model
Designation
HA300
HB360
HB480
HB600
Compressor
Fan Motor
LRA
(each)
Power Supply
HP
Power Supply
Qty.
2
208/230-3-60
2
47.1
350.0
208/230-3-60
1.25
4
4.5/4.3
124.6
4
460-3-60
2
25.0
158.0
460-3-60
1.25
4
2.15
64.9
80
70
5
575-3-60
2
19.9
125.0
575-3-60
1.25
4
1.7
51.9
70
60
2
208/230-3-60
4
32.1
195.0
208/230-3-60
1.25
4
4.5/4.3
154.4
175
175
4
460-3-60
4
16.4
95.0
460-3-60
1.25
4
2.15
78.3
90
90
150
150
5
575-3-60
4
12.1
80.0
575-3-60
1.25
4
1.7
58.2
70
70
2
208/230-3-60
4
42.0
239.0
208/230-3-60
1.50
4
5.8
201.7
225
225
4
460-3-60
4
19.2
125.0
460-3-60
1.50
4
2.9
93.2
110
110
5
575-3-60
4
13.8
80.0
575-3-60
1.50
4
2.2
67.5
80
80
2
208/230-3-60
4
47.1
350.0
208/230-3-60
1.50
4
5.8
224.7
250
250
4
460-3-60
4
25.0
158.0
460-3-60
1.50
4
2.9
117.9
125
150
5
575-3-60
4
19.9
125.0
575-3-60
1.50
4
2.2
93.4
110
110
REFRIGERANT MAINS
Many service problems can be avoided by taking adequate precautions to provide an internally clean and
dry system and by using procedures and materials that
conform to established standards.
Use hard drawn copper tubing where no appreciable
amount of bending around pipes or other obstructions
is necessary. If soft copper is used, care should be
taken to avoid sharp bends that may cause a restriction.
Pack fiberglass insulation and a sealing material such
as permagum around refrigerant lines where they penetrate a wall to reduce vibrations and to retain some
flexibility.
Support all tubing at minimum intervals with suitable
hangers, brackets or clamps.
Braze all copper-to-copper joints with Silfos-5 or equivalent brazing material. Do not use soft solder.
Insulate all suction lines with a minimum of 1/2" ARMAFLEX or equal. Liquid lines exposed to direct sunlight
and/or high temperatures must also be insulated.
Never solder suction and liquid lines together. They
can be taped together for convenience and support
purposes, but they must be completely insulated from
each other.
The liquid and suction connections permit leak testing,
evacuation, and partial charging of the field piping and
10
Min.
Max. Fuse
Unit
Disconnect
Size
Ampacity
Qty. FLA (each) (Amps)
Size
(Amps)
RLA
(each)
the evaporator without disturbing the condenser coils
during initial installation.
Before beginning installation of the mains, be sure that
the unit has not developed a leak in transit. If pressure
still exists in the system, it can be assumed to be leak
free. DO NOT release the holding charge.
A filter-drier MUST be field-installed in the liquid line of
every system to prevent dirt and moisture from damaging the system. Properly sized filter-driers are shipped
with each condensing section.
NOTE: Installing a filter-drier does not eliminate the
need for the proper evacuation of a system
before it is charged.
A field-installed moisture indicating sight-glass should
be installed in the liquid line(s) between the filter-drier
and the evaporator coil. The moisture indicating sightglass can be used to check for excess moisture in the
system or used as a visual means to verify refrigerant
charge.
All lines have a copper disc brazed over the end. Also,
if the unit does not have service valves, the holding
charge must be reclaimed to allow the installer to connect piping. The temperature required to make or break
a brazed joint is sufficiently high to cause oxidation of
the copper unless an inert atmosphere is provided.
NOTE: Dry Nitrogen should flow through the system at
all times when heat is being applied and until
the joint has cooled.
278805-YIM-A-1106
Remove the evaporator holding charge and any caps
or discs on the liquid and suction connections that will
not permit a free flow of nitrogen.
NOTE: Always drill a small hole in sealing caps and
discs before unbrazing to prevent the pressure
in the line from blowing them off.
Once the brazing process is complete, leak testing
should be done on all interconnecting piping and the
evaporator before proper evacuation to 500 microns is
performed. Once the line set and evaporator section is
properly evacuated the service valves can be opened
and the condensing unit is now ready to charge with
the appropriate weight of refrigerant.
NOTE: Solenoid and hot gas bypass valves (if used)
should be opened manually or electrically during brazing or evacuating.
LINE SIZING
The evaporator coil section is shipped with the side
panels suitable for right end piping connections when
viewed from the return air ends of the section.
1. Suction line pressure drop due to friction.
When sizing refrigerant pipe for a split-system air conditioner, check the following:
2. Liquid line pressure drop due to friction.
3. Suction line velocity for oil return.
Begin the refrigerant mains by installing the liquid line
from the condensing unit to the evaporator liquid connection, maintaining a flow of nitrogen during all brazing operations. The filter-drier and sight glass must be
located in this line, close to the evaporator. Make the
suction line connection at the evaporator and run the
line to the condensing unit.
For Units Without Service Valves - Reclaim the
refrigerant holding charge prior to opening any portion
of the system. Connect a low pressure Nitrogen source
to the suction and liquid line service ports on the condensing unit. Drill a small hole in the sealing disk; the
flow of Nitrogen will prevent any debris from entering
the system. Unbraze the sealing disk and prepare the
joint for connections of the main lines. Connect the
lines while maintaining a flow of Nitrogen from the liquid line service port through the evaporator, back to the
condensing unit and out the suction service port.
For Units Equipped With Service Valves - Verify the
service valves are fully seated by screwing the stem
down into the valve body until it stops. Connect a lowpressure nitrogen source to the service port on the
valve body. The flow of Nitrogen will prevent oxidation
of the copper lines during installation. Drill a small hole
in the sealing disk; the flow of Nitrogen will prevent any
debris from entering the system. Wrap the valve body
with a wet rag to prevent the valve body from overheating during the brazing process. Overheating the valve
will damage the valve seals. Ensure the valve is adequately protected prior to any brazing on the valve
body. Unbraze the sealing disk and prepare the joint
for connections of the main lines. Connect the lines
while maintaining a flow of Nitrogen from the liquid line
valve service port through the evaporator, back to the
condensing unit and out the suction valve service port.
4. Liquid line pressure drop due to vertical rise.
Tables 6 and 7 list friction losses for both the suction and liquid lines on the condensing section. For
certain piping arrangements, different sizes of suction line pipe may have to be used. The velocity of
the refrigerant vapor must always be great enough
to carry the oil back to the compressor.
Evaporator Below Condensing Section - On a split
system where the evaporator blower is located below
the condensing section, the suction line must be sized
for both pressure drop and for oil return. See Table 6.
Condensing Section Below Evaporator - When the
condensing section is located below the evaporator
blower, the liquid line must be designed for the pressure drop due to both friction loss and vertical rise. See
Table 10. If the pressure drop due to vertical rise and
friction exceeds 40 psi, some refrigerant will flash
before it reaches the thermal expansion valve.
Flash gas:
1. Increases the liquid line pressure loss due to friction that in turn causes further flashing.
2. Reduces the capacity of the refrigerant control
device that starves the evaporator.
3. Erodes the seat of the refrigerant control device.
4. Causes erratic control of the refrigerant entering
the evaporator.
SERVICE VALVES
These condensing units may have service valves on
the compressor suction line and on the liquid line
11
278805-YIM-A-1106
leaving the condenser coil or if so equipped from the
factory, if chosen as an option.
The liquid and suction line service valves have an
access port for evacuating, charging and pressurechecking the system.
Never remove a cap from an access port
unless the valve is fully back-seated with its
valve stem in the maximum counter-clockwise
position because the refrigerant charge will be
lost. Always use a refrigeration valve wrench to
open and close these service valves.
EVACUATION AND CHARGING
Determine the required weight of refrigerant using
Table 1, Physical Data and Table 8, Refrigerant Line
Charge. Table 1 includes operating charge based on
the unit plus 25 feet of refrigerant lines. Table 8
includes data required to adjust the charge for line
lengths other than 25 feet.
Connect a vacuum pump through a charging manifold
to both the liquid service port connection on the liquid
12
line and the suction service port connection on the suction line. Vacuum pump connection lines should be
short and no smaller than 3/8" OD.
The refrigerant mains and the evaporator may now be
evacuated. After proper evacuation and dehydration,
charge the required weight of liquid refrigerant into the
liquid access connection. After refrigerant flow slows,
start the compressor and continue to charge refrigerant
gas through the suction service port connection.
If proper equipment is not available for weighing in the
refrigerant charge, moisture indicating sight glass may
be used to aid in charging the unit.
After proper evacuation and dehydrating of the unit,
charge the unit as described above until the moisture
indicating sight glass is clear. The correct refrigerant
pressures are indicated as shown in Figures 14
through 17.
Operating compressor with suction pressure
below 23 psi will result in overheating of the
scrolls and permanent damage to the compressor drive bearing.
278805-YIM-A-1106
TABLE 6: SUCTION LINES
Model Designation
Full Capacity
HA300
Nominal
Capacity (Tons)
Refrigerant Flow
Rate (Lbs./Min.)
25
80
System #1
Half Capacity
Full Capacity
12.5
15
40
47
System #1
Half Capacity
7.5
23.5
HB360
Full Capacity
15
47
System #2
Half Capacity
Full Capacity
7.5
20
23.5
64
System #1
Half Capacity
10
32
HB480
Full Capacity
20
64
System #2
Half Capacity
Full Capacity
10
25
32
76
System #1
Half Capacity
12.5
38
HB600
Full Capacity
25
76
System #2
Half Capacity
12.5
38
Copper Tubing
(Inches, O.D.)
Refrigerant Gas
Velocity (Ft./Min.)
Friction Loss
(PSI/100 Ft.)
2 1/8
1945
1.2
2 5/8
1500
0.6
3 1/8
1040
0.3
2 1/8
1110
0.5
2 5/8
750
0.2
3 1/8
520
0.1
1 3/8
2873
4.1
1 5/8
2030
1.8
2 1/8
1167
0.5
1 3/8
1437
1.1
1 5/8
1015
0.5
2 1/8
850
0.2
1 3/8
2873
4.1
1 5/8
2030
1.8
2 1/8
1167
0.5
1 3/8
1437
1.1
1 5/8
1015
0.5
2 1/8
850
0.2
1 5/8
3120
4.3
2 1/8
1800
1.2
2 5/8
1200
0.4
1 5/8
1560
1.2
2 1/8
900
0.3
2 5/8
600
0.1
1 5/8
3120
4.3
2 1/8
1800
1.2
2 5/8
1200
0.4
1 5/8
1560
1.2
2 1/8
1800
1.2
2 5/8
1200
0.4
1 5/8
3384
4.5
2 1/8
1945
1.2
2 5/8
1500
0.6
1 5/8
1710
1.4
2 1/8
983
0.4
2 5/8
750
0.2
1 5/8
3384
4.5
2 1/8
1945
1.2
2 5/8
1500
0.6
1 5/8
1710
1.4
2 1/8
983
0.4
2 5/8
750
0.2
13
278805-YIM-A-1106
TABLE 7: LIQUID LINES
Model Designation
HA300
Nominal
Capacity
(Tons)
Refrigerant
Flow Rate
(Lbs./Min.)
System #1
Full Capacity
25
80
System #1
Full Capacity
15
47
System #2
Full Capacity
15
47
System #1
Full Capacity
20
64
System #2
Full Capacity
20
64
System #1
Full Capacity
25
76
System #2
Full Capacity
25
76
HB360
HB480
HB600
Copper Tubing
(Inches, O.D.)
Refrigerant
Liquid Velocity
(Ft./Min.)
Friction Loss
(PSI/100 Ft.)
5/8
7/8
1 1/8
5/8
7/8
1 1/8
5/8
7/8
1 1/8
5/8
7/8
1 1/8
5/8
7/8
1 1/8
5/8
7/8
1 1/8
5/8
7/8
1 1/8
500
265
156
330
159
100
330
159
100
440
212
90
440
212
90
400
265
156
400
265
156
14.2
3.4
1.0
7.9
1.4
0.8
7.9
1.4
0.8
13.2
2.3
0.6
13.2
2.3
0.6
8.5
3.4
1.0
8.5
3.4
1.0
TABLE 8: R-22 LINE CHARGE1
LINE SET, O.D.2
LIQUID
SUCTION
O.D., (INCHES)
REFRIGERANT, LB/FT
7/8
1 5/8
2 1/8
0.236
0.019
0.033
1.
Charges based on 40ºF suction temperature and 105ºF liquid temperature.
2.
Type “L” copper tubing.
NOTE: Add the operating charge of the condensing unit, evaporator coil and 25 feet of interconnecting piping to any additional piping
refrigerant charge required (determined from Table 8) for total system charge.
14
278805-YIM-A-1106
Note 1
Note 1. See page 16 and 17 for details
on wiring HA/HB models to non LA/LB
indoor models.
FIGURE 3 - TYPICAL FIELD WIRING DIAGRAM - HA 300 UNIT
15
278805-YIM-A-1106
FIGURE 4 - TYPICAL FIELD WIRING DIAGRAM - HB 360, 480, 600 UNITS
16
278805-YIM-A-1106
%
"$
%
"$
!
" # $ ! !
FIGURE 5 - TYPICAL LIQUID LINE SOLENOID WIRING
17
278805-YIM-A-1106
REAR
B
LEFT
A
C
G
H
D
E
RIGHT
FRONT
F
FIGURE 6 - HA/HB UNIT DIMENSIONS
TABLE 9: UNIT DIMENSIONS (INCHES)
MODEL
A
B
C
D
E
F
G
H
HA300
110.5
88.5
37.5
32.8
31.0
46.1
37.1
23.6
HB360
110.5
88.5
37.5
32.8
31.0
46.1
37.1
23.6
HB480
128.5
88.5
37.5
41.8
40.0
46.1
37.1
23.6
HB600
128.5
88.5
57.7
41.8
40.0
46.1
37.1
23.6
PIPING AND ELECTRICAL CONNECTIONS
Piping connections are made from the rear of the unit.
Connections can be made directly to the suction and
liquid piping or if so equipped to the optional suction
and liquid line service valves.
18
With the piping connections being made at the rear of
the unit, piping can be routed to the unit from the left or
right side.
Electrical connections for power and control wiring is
made from the front of the unit, left of the electrical control box access. See Tables 10, 11 and 12 and Figures
7 thru 11 for piping sizes and electrical knockout
details.
278805-YIM-A-1106
Control Wiring
Power Wiring
FIGURE 7 - 25, 30 & 40 TON POWER AND CONTROL WIRING CONNECTIONS
Control Wiring
Power Wiring
FIGURE 8 - 50 TON POWER AND CONTROL WIRING CONNECTIONS
19
278805-YIM-A-1106
PIPING AND ELECTRICAL CONNECTION SIZES
TABLE 10: PIPING AND ELECTRICAL
CONNECTION SIZES (25T) (INCHES)
CONNECTION ENTRY
SIZE
SUCTION LINE SYS #1
1-5/8 OD
LIQUID LINE SYS #1
7/8 OD
POWER WIRING KNOCKOUT
SEE TABLE 12
CONTROL WIRING
7/8 HOLE
TABLE 11: PIPING AND ELECTRICAL
CONNECTION SIZES (30/40/50T)
(INCHES)
CONNECTION ENTRY
SIZE
SUCTION LINE SYS #1
1-5/8 OD
LIQUID LINE SYS #1
7/8 OD
SUCTION LINE SYS #2
1-5/8 OD
LIQUID LINE SYS #2
7/8 OD
POWER WIRING KNOCKOUT
SEE TABLE 12
CONTROL WIRING
7/8 HOLE
TABLE 12: ELECTRICAL POWER KNOCKOUT SIZES (INCHES)
CONNECTION ENTRY
E
POWER WIRING
25T/230V
25T/460-575V
30-40-50T/230V
30-40-50T/460-575V
2”
1-1/2”
2-1/2”
1-1/2”
Liquid
Suction
FIGURE 9 - 25 TON PIPING CONNECTIONS
20
278805-YIM-A-1106
Liquid (Sys 2)
Liquid (Sys 1)
Suction (Sys 1)
Suction (Sys 2)
FIGURE 10 - 30 & 40 TON PIPING CONNECTIONS
Liquid (Sys 2)
Suction (Sys 2)
Suction (Sys 1)
Liquid (Sys 1)
FIGURE 11 - 50 TON PIPING CONNECTIONS
21
278805-YIM-A-1106
START-UP
10. Are there any visible signs of a refrigerant leak,
such as oil residue?
CRANKCASE HEATER
The crankcase heater must be energized at least 8
hours before starting the compressor. To energize the
crankcase heater, the main disconnect switch must be
closed. During this 8 hour period, the system switch on
the room thermostat must be “OFF” to prevent the
compressor from starting. Make sure that the bottom of
the compressor is warm to the touch to prove crankcase heater operation.
11. Is any electrical wire laying against a hot refrigerant
line?
INITIAL START-UP
1. Supply power to the unit through the disconnect
switch at least 8 hours prior to starting the compressor.
2. Move the system switch on the thermostat to the
AUTO or COOL position.
Do not attempt to start the compressor without
at least 8 hours of crankcase heat or compressor damage can occur.
PRE-START CHECK
Before starting the unit, complete the following check
list:
1. Have sufficient clearances been provided?
2. Has all foreign matter been removed from the interior of the unit (tools, construction or shipping
materials, etc.)?
3. Have the condenser fans been rotated manually to
check for free rotation?
4. Are all wiring connections tight?
5. Does the available power supply agree with the
nameplate data on the unit?
6. Is the control circuit transformer set for the proper
voltage?
7. Have the fuses, disconnect switch and power wire
been sized properly?
8. Are all compressor hold-down nuts properly
secured?
9. Are any refrigerant lines touching each other or any
sheet metal surface? Rubbing due to vibration
could cause a refrigerant leak.
22
3. Reduce the setting of the room thermostat to energize the compressor.
4. Check the operation of the evaporator unit per the
manufacturer’s recommendations.
5. With an ammeter, check the compressor amps
against the unit data plate.
6. Check for refrigerant leaks.
7. Check for any abnormal noises and/or vibrations,
and make the necessary adjustments to correct fan
blade(s) touching shroud, refrigerant lines hitting
on sheet metal, etc.
8. After the unit has been operating for several minutes, shut off the main power supply at the disconnect switch and inspect all factory wiring
connections and bolted surfaces for tightness.
OPERATION
NOTE: The timing intervals described in the following
procedures are nominal. Some variations will
naturally occur due to differences in individual
components, or due to variations in ambient
temperature or line/control voltage. Refer to
the wiring labels inside of the unit control
access panel for additional information.
SEQUENCE OF OPERATION
OVERVIEW
These series of condensing units, come factory
equipped with Simplicity™ controls to monitor all unit
functionality and safety controls.
278805-YIM-A-1106
SAFETY CONTROLS
The Simplicity™ control board incorporates features to
monitor safety circuits as well as minimize compressor
wear and damage. An anti-short cycle delay (ASCD) is
utilized to prevent operation of a compressor too soon
after its previous run. Additionally, a minimum run time
is imposed anytime a compressor is energized to allow
proper oil return to the compressor. The ASCD is initiated on unit start-up and on any compressor reset or
lockout.
The Simplicity™ control board monitors the following
inputs for each cooling system:
•
•
•
A high-pressure switch is factory installed to protect against excessive discharge pressure due to a
blocked condenser coil or a condenser fan motor
failure. During cooling operation, if a high-pressure
limit switch opens, the Simplicity™ control board
will de-energize the associated compressors and
initiate the 5-minute ASCD. If the call for cool is still
present at the end of the ASCD, the control board
will re-energize the halted compressor.
If a high-pressure switch opens three times within
two hours of operation, the Simplicity™ control
board will lockout the associated system compressors and will flash an error code (see Table 13).
A low-pressure switch to protect the unit against
excessively low suction pressure is standard on all
condensing units.
If the low-pressure switch opens during normal operation, the Simplicity™ control board will de-energize the
compressor, initiate the ASCD, and shut down the condenser fans.
On startup, if the low-pressure switch opens, the Simplicity™ control board will monitor the low-pressure
switch to make sure it closes within one minute. If it
fails to close, the unit will shut down the associated
compressor and begin an ASCD. If the call for cool is
still present at the end of the anti-short cycle time
delay, the control board will re-energize the halted
compressor.
If a low-pressure switch opens three times within one
hour of operation, the Simplicity™ control board will
lock-out the associated compressor and flash an error
code (see Table 13).
An ambient air switch will lock out mechanical cooling
at 40°F. In order to operate the unit in ambient temper-
atures below 40°F, the optional low ambient kit must be
field installed which will allow the unit to operate during
conditions down to 0°F.
The refrigerant systems are independently monitored
and controlled. On any fault, only the associated system will be affected by any safety/preventive action.
The other refrigerant system will continue to operate
unless it is affected by the fault as well.
PUMP OUT
The pump out function is a standard feature on the 25
to 50 ton systems. The pump out circuit is activated
each time the first and third compressor stage is called
for by the thermostat. As such, it’s a “Pump Out On
Start Up” design. A normally closed solenoid valve
(POS1, 2, 3 or 4) is placed in the liquid line, just prior to
expansion valve.
When cooling is not being called for by the thermostat,
the pump out solenoid (POS) is not energized, so it’s in
the closed position. When the Simplicity™ control
receives a call for cooling, it energizes a compressor.
With the POS being closed, it causes the pressure on
the low side of the system to begin falling.
When the low pressure switch (LPS) opens, the control
board energizes its on-board pump out relay, providing
a 24vac output to an external relay used to energized
the pump out solenoid. The refrigeration circuit being
controlled is not in normal operating mode.
If the low pressure switch is already open on a call for
cooling, the pump out relay is energized immediately. If
the LPS does not open after 5 minutes, the pump out
relay is energized.
CONTINUOUS BLOWER
By setting the room thermostat to “ON,” the supply air
blower will operate continuously.
INTERMITTENT BLOWER
With the room thermostat fan switch set to “AUTO” and
the system switch set to either the “AUTO” or “HEAT”
settings, the blower is energized whenever a cooling or
heating operation is requested. The blower is energized after any specified delay associated with the
operation.
When energized, the indoor blower has a minimum run
time of 30 seconds. Additionally, the indoor blower has
a delay of 10 seconds between operations.
23
278805-YIM-A-1106
COOLING SEQUENCE OF OPERATION
When the thermostat calls for the first stage of cooling,
the low-voltage control circuit from the “R” to “Y1” and
“G” is completed. The Simplicity™ control board activates the first stage of cooling by energizing compressor one and both condenser fans of system one. After
completing the specified fan on delay for cooling, the
Simplicity™ control board will energize the indoor
blower motor.
When the thermostat calls for the second stage of cooling, the low-voltage control circuit from “R” to “Y2” is
completed. The control board will energize compressor
two.
If there is an initial call for both stages of cooling, the
Simplicity™ control board will delay energizing compressor two by 30 seconds in order to avoid an excessive power rush.
When the thermostat calls for the third stage of cooling,
the low-voltage control circuit from the “R” to “Y3” is
completed. The Simplicity™ control board activates the
third stage of cooling by energizing compressor three
and both condenser fans of system two.
When the thermostat calls for the fourth stage of cooling, the low-voltage control circuit from “R” to “Y4” is
completed. The control board will energize compressor
four.
Once the thermostat has been satisfied, the
Simplicity™ control board will de-energize Y1, Y2, Y3
and Y4. If the compressors have satisfied their
minimum run times, the compressors and condenser
fans are de-energized. Otherwise, the unit operates
each cooling stage until the ASCD has elapsed. Upon
24
the completion of first stage cooling, the blower is
stopped following the completion of the fan off delay
cycle.
FLASH CODES
Various flash codes are utilized by the unit control
board (UCB) to aid in troubleshooting. Flash codes are
distinguished by the short on and off cycle used
(approximately 200ms on and 200ms off). To show
normal operation, the control board flashes a 1 second
on, 1 second off "heartbeat" during normal operation.
This is to verify that the UCB is functioning correctly.
Do not confuse this with an error flash code. To prevent
confusion, a 1-flash, flash code is not used.
Alarm condition codes are flashed on the UCB lower
left Red LED, See Figure 12. While the alarm code is
being flashed, it will also be shown by the other LEDs:
lit continuously while the alarm is being flashed. The
total of the continuously lit LEDs equates to the number
of flashes, and is shown in the table. Pressing and
releasing the LAST ERROR button on the UCB can
check the alarm history. The UCB will cycle through the
last five (5) alarms, most recent to oldest, separating
each alarm flash code by approximately 2 seconds. In
all cases, a flashing Green LED will be used to indicate
non-alarm condition.
In some cases, it may be necessary to "zero" the
ASCD for the compressors in order to perform troubleshooting. To reset all ASCDs for one cycle, press and
release the UCB TEST/ RESET button once.
Flash codes that do and do not represent alarms are
listed in Table 13.
278805-YIM-A-1106
TABLE 13: UNIT CONTROL BOARD FLASH CODES
FLASH CODE
On Steady
1 Flash
DESCRIPTION
GREEN
LED
16
RED
LED
8
RED
LED
4
RED
LED
2
RED
LED
1
This is a Control Failure
-
-
-
-
-
Not Applicable
-
-
-
-
-
Flashing
Off
Off
On
Off
On
2 Flashes
Control waiting ASCD1
3 Flashes
HPS1 Compressor Lockout
Off
Off
Off
On
4 Flashes
HPS2 Compressor Lockout
Off
Off
On
Off
Off
5 Flashes
LPS1 Compressor Lockout
Off
Off
On
Off
On
6 Flashes
LPS2 Compressor Lockout
Off
Off
On
On
Off
7 Flashes
FS1 Compressor Lockout
Off
Off
On
On
On
8 Flashes
FS2 Compressor Lockout
10 Flashes
Compressors Locked Out on Low Outdoor Air Temperature1
12 Flashes
Unit Locked Out due to Fan Overload Switch Failure
13 Flashes
14 Flashes
OFF
1.
Off
On
Off
Off
Off
Flashing
On
Off
On
Off
Off
On
On
Off
Off
Flashing
On
On
Off
On
EEPROM Storage Failure
Off
On
On
On
Off
No Power or Control Failure
Off
Off
Off
Off
Off
Compressor Held Off due to Low
Voltage1
Non-alarm condition.
Check
Alarm
History
Reset All
ASCDs for
One Cycle
Non Alarm
Condition Green
LED Flashing
Current Alarm
Flashed
Red LED
FIGURE 12 - UNIT CONTROL BOARD
25
278805-YIM-A-1106
UNIT CONTROL BOARD OPTION SETUP
OPTION BYTE SETUP
•
•
•
•
•
Enter the Option Setup mode by pushing the
OPTION SETUP / STORE button, and holding it for
at least 2 seconds.
The green status LED (Option Byte) will be turned
on and the red status LED (Heat Delay) is turned
off.
The 4 LED will then show the status of the labeled
option Low Ambient Lockout.
Press the UP or Down button to change the LED
status to correspond to the desired Option Setup.
To save the current displayed value, push the
OPTION SETUP / STORE button and hold it for at
least 2 seconds. When the value is saved, the
green LED will flash a few times and then normal
display will resume.
NOTE: While in either Setup mode, if no buttons are
pushed for 60 seconds, the display will revert
to its normal display, exiting the Option Setup
mode. When saving, the control board only
saves the parameters for the currently displayed mode (Option Byte or Heat Delay).
(Heat Delay not applicable on these units.)
CONDENSER FAN OPERATION
These condensing units are factory equipped with fan
cycling switches to regulate system head pressure.
When outdoor ambient conditions are cool, the head
pressure of any air conditioning system may drop too
low for optimal performance. These condensing units
maximize system performance in a variety of ambient
conditions by incorporating fan cycling switches to
maintain proper system head pressure.
On these condensing units, the condenser fans of a
given system are powered when compressor one is
energized. Fan one will start immediately upon a call
for first stage cooling. However, fan two is equipped
with a fan cycling switch and will not start until the system head pressure reaches 280 psig. Condenser fan
two will operate until the system head pressure drops
below 180 psig where the fan cycling switch will shut
the fan down. The unit will continue to operate condenser fan one until the system head pressure reaches
280 psig at which time condenser fan two will restart.
See Fan Orientation on page 26 Figure 13.
26
FIGURE 13 - FAN ORIENTATION CONTROL BOX
END
These 4-pipe condensing units can also be used with
two appropriately sized indoor units. In this case, each
indoor unit will have it’s own thermostat. One thermostat will connect to “Y1” and “Y2” on the Simplicity™
control board and the other will connect to “Y3” and
“Y4”.
OPERATION WITH A TWO-STAGE THERMOSTAT
If the total system is to be controlled with a 2-stage
thermostat (HA300):
1. Terminals Y1 and Y2 of the Simplicity™ control
board controlling system one, should be connected
to stage one and two of the thermostat.
OPERATION WITH A FOUR-STAGE THERMOSTAT
If the total system is to be controlled with a 4-stage
thermostat (HB360, HB480 and HB600):
board controlling system one, should be connected
to stage one and two of the thermostat.
board controlling system two, should be connected
to stage three and four of the thermostat.
SECURE OWNER'S APPROVAL
When the system is functioning properly, secure the
owner's approval. Show him the location of all disconnect switches and the thermostat. Teach him how to
start and stop the unit and how to adjust temperature
settings within the limitations of the system.
278805-YIM-A-1106
MAINTENANCE
These fan motors are equipped with factory lubricated
and sealed ball bearings. They do not require any
maintenance.
CLEANING CONDENSER SURFACE
Dirt should not be allowed to accumulate on the condenser coils or other parts in the condenser air circuit.
Clean as often as necessary with a brush, vacuum
cleaner attachment or other suitable means.
COMPRESSOR REPLACEMENT
Obtain replacement compressor or parts from your
local Distributor.
LUBRICATION
25-ton Charging Chart
Outdoor Temperature
Discharge Pressure (PSI)
400
115º
350
105º
300
95º
85º
75º
65º
250
200
150
100
60
70
80
90
100
Suction Pressure (PSI)
1. Ensure all condenser fans are running when charging unit. One fan may shut down at lower ambient temperatures making the chart above
inaccurate.
2. This chart is applicable to the unit with the TXV's left to the factory setting. If the TXV's have been adjusted in the field, the chart above may no
longer apply.
FIGURE 14 - 25 TON CHARGING CHART
27
278805-YIM-A-1106
Outdoor Temperature
400
115º
350
105º
300
95º
85º
250
75º
65º
200
150
100
60
70
80
90
100
inaccurate.
longer apply.
Outdoor Temperature
400
115º
350
105º
300
95º
85º
75º
65º
250
200
150
100
60
70
80
90
100
inaccurate.
longer apply.
28
278805-YIM-A-1106
Outdoor Temperature
400
115º
350
105º
300
95º
85º
75º
65º
250
200
150
100
60
70
80
90
100
inaccurate.
longer apply.
29
278805-YIM-A-1106
FIGURE 18 - TYPICAL 25 TON CONDENSER UNIT WIRING DIAGRAM - 208/230-3-60
30
278805-YIM-A-1106
FIGURE 19 - TYPICAL 25 TON CONDENSER UNIT WIRING DIAGRAM - 460-3-60, 575-3-60
31
278805-YIM-A-1106
FIGURE 20 - TYPICAL 30 or 40 TON CONDENSING UNIT WIRING DIAGRAM - 208/230-3-60
32
278805-YIM-A-1106
FIGURE 21 - TYPICAL 30 or 40 TON CONDENSING UNIT WIRING DIAGRAM - 460-3-60, 575-3-60
33
278805-YIM-A-1106
FIGURE 22 - TYPICAL 50 TON CONDENSER UNIT WIRING DIAGRAM - 208/230-3-60
34
278805-YIM-A-1106
FIGURE 23 - TYPICAL 50 TON CONDENSER UNIT WIRING DIAGRAM - 460-3-60, 575-3-60
35
Subject to change without notice. Printed in U.S.A.
Copyright © 2006 by Unitary Products Group. All rights reserved.
Unitary
Products
Group
278805-YIM-A-1106
Supersedes: 106246-YIM-A-0105
5005
York
Drive
Norman
OK
73069

Installation Manual - HA/HB 300-600(11/06)

Transcription

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