MicroMetl - MN Air Online

Transcription

INSTALLATION INSTRUCTIONS
MicroMetl
For 1682/4682/5682 Series
CAUTION!
Always disconnect power before changing
filters.
ILL. #2
(7.5-12.5 Ton Only)
CAUTION!
Exhaust fan can cause severe injury. Always
disconnect power before servicing.
ILL. #1
INSTRUCTIONS
1. Disconnect the power to HVAC unit.
2. Remove the bottom panel from the HVAC
unit and discard. Remove top filter access
door and set aside for later use. (ILL. 1)
3. Uncrate the MicroMetl economizer
4. Remove the discharge air sensor from the
economizer and install in the supply air
chamber/duct. See wiring diagram and ILL.
6A.
5. Install the power exhaust supports for 200
and 300 styles. Use #12 x 1” tek screws to
secure the supports to the base of unit (3
each). Use #8 x 1/2” tek screws to secure
the supports to the unit’s economizer post
(2 each). (ILL. 2 and 2A)
6. Slide the economizer into the return
chamber, being sure not to pinch the
harness. (ILL. 3) The rear flange of the
economizer slides under the tab on the
duct flanges (see rear flange detail). Secure
economizer in place through side and
bottom mating flange holes.
7. Connect the 12 pin plug/harness form
the economizer into the 12 pin plug in the
HVAC unit.
HVAC unit’s
filter door
Unit
Save
Disc
ard
#12
Screws
HVAC unit’s bottom
panel. Remove and
discard.
Factory Provided supports
(2) Flush to unit side
ILL. #2A
ILL. #3
Power
Exhaust
Support
Unit
HVAC unit
corner post
#8 Screw
Power Exhaust
Support Detail
(Top View)
Economizer
Power Exhaust Specifications
MicroMetl
Part No.
External Static
in. wg. (2)
1682-0103
208/230V 3PH
4682-0103
460V 3PH
5682-0103
575V 3PH
1682-0203
208/230V 3PH
4682-0203
460V 3PH
CFM performance
0.1
0.2
0.25
0.3
Full
Load
Amps(1)
2375
2125
2000
1850
1.1
3300
3000
2700
1.7
575V 3PH
1.1
6.6/6.6
460V 3PH
MMC
1/2
1725
1
3.3/3.4
3800
208/230V 3PH
575V 3PH
1725
.65
1682-0303
5682-0303
HP
Economizer clip
on HVAC unit
2.3/2.2
5682-0203
4682-0303
Motor
RPM
4200
4075
4000
3850
3.3
Economizer
Slide
economizer
rear flange
into tab
Unit base
1725
2
Rear Flange Detail
2.4
3035 N. Shadeland Ave, Suite 300 Indianapolis, IN. 46226
MMC WEST
202 South 18th. St. Sparks, NV. 89431
Manufacturer reserves the right to discontinue, or change at any time, specifications, designs and prices without notice and without incurring obligations.
Form No. 6668-1P
Copyright MicroMetl Corporation 2003 All rights reserved
1
ILL. #6A
(Side View)
ILL. #5
Filter access
door
Mount discharge
sensor here
Water entrainment
filter
Power exhaust
hood
ECONOMIZER WIRING INSTRUCTIONS
ILL. #6
Thermostat
Connection Board
1
2
Red
NOTE: There are (4) loose wires available in the HVAC unit. Connect the pink
and violet wires to the discharge sensor.
Do not use the brown and white wires
3
4
5
Plug harness installed
in HVAC units
Maintains mixed air temperature
between 50O-56O.
If using a fixed dry bulb, the
orange wire will house a 620
ohm resistor.
To compressor lockout
“2” on HVAC unit (if 2
stage is used)
Do
not use
Brw
Connect the pink and violet
wires to the discharge sensor. Do
not use brown or white wires
Compressor lockout switch on
some models. Lockouts out
compressors at 35O F (+/- 5O)
Field wire if desired.
Remove this jumper / resistor
when using differential enthalpy.
To compressor lockout
“1” on HVAC unit
MicroMetl discharge
sensor (mount in blower
compartment)
Pink
4
If using differential enthalpy,
setpoint should be at “D”.
Enthalpy or
adj. dry bulb
Actuator
Logic
Exhaust Fan Set Point
MicroMetl economizer
harness / plug
620 OHM
Resister
+
SR
Minimum Position
Setting
DCV / CO2 maximum
setpoint
Red
DCV / CO2 activation
setpoint
Power exhaust fan
connection
To optional
CO2 sensor
2
EF
EF1
AQ
AQ1
Black
N
24V
HOT
Enthalpy
changeover
setpoint
1
MicroMetl Integrated Economizers
The purpose of an economizer is to use outdoor air for cooling,
whenever possible, to reduce compressor operation.
The fully open actuator cannot satisfy the space demand,
mechanical cooling is sequenced on. During the unoccupied
period, the actuator will override minimum position setting and
drive fully closed. On a loss of power, the actuator will spring
return fully closed.
The economizer system initially responds to a signal from the
cooling thermostat and functions as a true first stage for cooling, while providing maximum fuel economy. The economizer
automatically locked out during the heating mode and holds the
outdoor air damper at the minimum position settings.
When in heating operation, or when outdoor air temperature or
enthalpy conditions are high, economizer operation is locked out,
and actuator os held at minimum position.
During the occupied period, on a call for cooling, when outdoor
air temperature or enthalpy conditions are low, the economizer
actuator will proportion to maintain between 50O F and 56O F at
thermistor discharge sensor.
The staging relay is used when the first stage compressors must
provide mechanical cooling when assisting the economizer.
The staging relay can be omitted when the second stage
compressors can be used to assist the economizer with
mechanical cooling.
If the mixed or discharge temperature is above 56O F, actuator
will open to admit additional outdoor air until the temperature
return to the 50O to 56O F range. If the mixed or discharge air
temperature is below 50O F, the actuator will proportion closed,
shutting the outdoor air damper until the temperature returns to
the 50O to 56O F range. During the occupied period, the actuator
will not close past the minimum position. If the fully open
actuator cannot satisfy the space demand, mechanical cooling is
sequenced on.
3
Component Description
6
1
4C
3
4A
2
4B
5
1. Damper actuator ...9901-1865 provides 24v modulating
control of economizer damper, 25 in. lb. of torque,
(Honeywell M7215A-1008)
4A. Entahlpy sensor ...9901-0018 senses and combines temperature and humidity of outdoor air. And also provides the signal to the economizer logic. (Honeywell C7400A used on 1008-0100)
2. Discharge sensor ...9901-0001 provides a signal (3000
Ohms at 25O C or 77O F) to the actuator during free cooling
or economizer mode. The signal opens the economizer
damper until the discharge temperature drops below 55O.
At this time the signal causes the motor to modulate the
damper and mix outside air with return air to maintain a 50O
F to 56O F discharge temperature.
4B. Adjustable dry bulb ...9901-2251 senses temperature of outside air and provides signal to the economizer logic. (Honeywell C7660)
4C. Fixed dry bulb ...9901-0183 senses temperature of outside air. If below 70O setpoint, allows for free cooling.
3. Economizer logic ...9901-1805 accepts input from discharge
sensor and outside air sensor. Analyzes input to control
actuator modulation and economizer switching. Logic
also houses minimum position adjustment, enthalpy or
adjustable dry bulb adjustment, power exhaust control, and
CO2 demand control ventilation adjustment. When used
with optional differential sensor in the return air, the logic is
capable of selecting the most economical air available for
cooling. (Honeywell W7212-A1009)
5.
Wire harness color coded and pre-wired to actuator and economizer logic.
6.
Compressor lockout ...9901-0252 locks out compressor
when temperature falls below 35OF (+/- 5OF). Shipped with
economizer, but must be field wired, if desired.
NOTES:
4
•
Refer to the following pages for economizer logic operation
instructions at the end of the power exhaust instructions in
this manual.
•
If your economizer model includes the adjustable dry bulb
sensor option, refer to the operation instruction at the back of
this manual.
Power Exhaust Wiring
ILL. #8
POWER EXHAUST
WIRING INSTRUCTIONS
Disconnect box
8. Set the power exhaust in front of the economizer. Attach the two wire low voltage harness from the power exhaust to its mating plug in the economizer side flange. (ILL. 8A) Attach the high voltage cable from the power exhaust to its mating plug in the economizer. Route the high voltage cable to the HVAC unit controls. (ILL. 8)
Coil and filter rack
9. Install the power exhaust hood assembly over the
economizer. NOTE: The hood hooks over the top of the economizer (See Hood Latch Detail). Use #12 x 1” screws
to secure the power exhaust hood to the unit’s economizer posts and power exhaust supports.
10. Locate the exhaust setpoint potentiometer on the economizer controller logic. Adjust the potentiometer so that the exhaust fan is activated when the outside air dampers are completely open.
Wire path determined by
installer
1682 power
exhaust
11. Wire power exhaust per diagram on next page. Secure wires in place away from all moving parts.
12. First Calculate MCA New using the following formula:
Economizer
Installation
hook on the
hood
MCA New = MCA unit only + MCA of Power Exhaust
For example, using a 48HJD006 - 5 unit with MCA =
28.9 and
MOCP = 35, with CRPWREXH030A00 power exhaust.
MCA New = 28.9 amps + 1.6 amps = 30.5 amps.
Rain
Hood
13a. If MCA New < MOCP for the HVAC unit, you can tie the
power wire to the HVAC contactor terminal strip. See
Diagram 1, or follow 13b. If installed in unit, tap off terminal
block capable of handling more than 1 wire.
Hood Latch Detail
**Route power exhaust wire to protect from damage (from impact,
pull, sharp edges, hot surfaces, etc.)
13b. If MCA New > MOCP for the HVAC unit, you must run power wire for the power exhaust to an external disconnect. Make sure the disconnect is sized properly for the power from the power exhaust as well as the HVAC unit.
ILL. #8A
*Refer to Diagram 1 on Page 6 for more information.
13. If using modulating power exhaust option, refer to
modulating options page.
IMPORTANT NOTE:
Follow all local codes when wiring system.
CAUTION!
Outside air blades must be completely
open before exhaust fan is activated.
Adjust end switch accordingly.
CAUTION!
Exhaust fan can cause severe injury. Always disconnect power before servicing.
5
13a
13b
DIAGRAM 1
NOTES:
1. 575 V transformer No. HT01AH859 is ordered separately from power exhaust.
2. Economizer actuator and controller are shipped with the economizer - not with power exhaust.
3. Connections from End Switch plug to the economizer controller are made by installer.
4. If a single power source is to be used, size wire to include power exhaust MCA and MOCP.
Check MCA and MOCP When power exhaust is powered through the unit. Determine the new MCA including the power exhaust using
the following formula:
MCA New = MCA unit only + MCA of Power Exhaust
For example, using a 48HJD006 - 5 unit with MCA = 28.9 and MOCP = 35, with CRPWREXH030A00 power exhaust. MCA New = 28.9 amps + 1.6 amps = 30.5 amps. If the new MCA does not go over the MOCP published, then MOCP would not change. The MOCP in this example is 35 amps, the MCA New is below 35, therefore the MOCP is OK. If “MCA New” is larger than the published MOCP, raise the MOCP to the next larger size. For separate power, the MOCP for the power exhaust will be 15 amps per NEC.
6
Power Exhaust Wiring
ILL. #10
24-Volt Transformer Color Code
CONTROL BOX IN POWER EXHAUST
Common
Yellow Yellow
Yellow
Black
Power
Red - 208V
Orange - 230V
Black - 460V
Grey - 575V
NOTE:
1) Wire transformer according to
it’s wiring description and the
customer specifications.
2) Transformer, contactor and
fuses are to be mounted in a
NEMA type electrical box.
3) Use 14 AWG or larger
conductor for wiring.
4) Follow all local codes.
**Refer to
Diagram 1. Use
the formula on
page 6 and 7 to
determine
electrical
configuration.
**Wire color can be substituted
to Red, White, Black, and Green
between the motors and power
exhaust terminal block.
PLUG #2
Wiring Diagram For 102S-0100 Two Speed Power Exhaust Controller
Low
Speed
ELECTRICAL BOX
R1
Low speed
motor
1
LOW SPEED
7
Mounted on
economizer
actuator
BLUE
YELLOW
BLACK
BLUE
YELLOW
BLACK
BLUE
YELLOW
BLACK
Power
Red - 208V
Orange - 230V
Black - 460V
Grey - 575V
T5
T6
motor
COMMON
Common
Yellow Yellow
Yellow
Black
NOTE:
1) Wire transformer according to
it’s wiring description and the
customer specifications.
**Refer to Diagram 1. Use the
formula on page 6 and 7 to
2) Transformer, contactor and
determine electrical configuration
fuses are to be mounted in a
25 ft. SE0W/
NEMA type electrical box.
S0W Power
3) Use 14 AWG or larger
Cord
conductor for wiring.
High speed
4) Follow all local codes.
GROUND
ORANGE
BLUE
YELLOW
BLACK
POWER
GROUND
YELLOW
YELLOW
T4
24-Volt Transformer Color Code
A
B
R1
9
6
ORANGE
High
Speed
7
T1
T2
T3
Mounted on
economizer
actuator
**Wire color can be substituted
to Red, White, Black, and Green
between the motors and power
exhaust terminal block.
Modulating Blower Power Exhaust (Option)
Blower Modulation Installation Instructions (use this page only if the modulating exhaust option has been ordered)
The 1682/4682/5682-0103-M*930, and 4682/1682-0303-M*930 Power Exhaust contains a motor controller that varies the blower speed
in order to maintain an acceptable room pressure. The power exhaust is equipped with a pressure sensing transducer that compares
room pressure to atmospheric. This transducer sends a signal to the motor controller which varies the motor voltage in order to provide
pressure relief.
Installation Instructions:
1. Install 1/8” i.d. or 3/16” i.d. pressure tubing to the room pressure sensor located within the building space.
2. Power exhaust is factory set at these CFM at .25”:
1682/4682/5682-0103
1682/4682/5682-0203
1682/4682/5682-0303
Note: If the power exhaust will not
engage, check motor controller for
fault light. If fault light is on, reverse
phase sequence at the power cord
(not in the motor box)
2000 CFM
3000 CFM
4000 CFM
3. Place the HVAC unit in continuous operation mode.
4. In order to determine system operation conditions, adjust the economizer minimum position to 100% outside air. At this time measure
the room static pressure differential to insure that the space is balanced to an acceptable pressure difference (i.e. less than 0.05” w.g.). If the room pressure i above 0.05” w.g., increase the blower speed by adjusting the motor pulley.
5. Measure the power exhaust line amperage at the disconnect box. Compare the amperage to the table below to insure that the
motor will not overload during modulation.
6. The amp draw must not exceed the values listed below.
7. If the amperage is too high, the blower must be lowed down by adjusting the pulleys. Repeat steps 3 to 6. If the room pressure is
excessive at this point, call MicroMetl for further assistance.
**If installed in unit, tap off terminal block capable for handling more than 1 wire.
Factory installed tubing
to atmospheric
pressure port
ILL. #13
Factory installed tubing
to room pressure
sensor
25 ft of tubing
factory supplied
Factory installed
atmospheric pressure
port. Covered by hood
Transducer factory
installed
Return air duct.
Field supplied
Tubing for room
pressure field
installed
Maximum Amp Draw
Room pressure sensing port. Mount to
ceiling or wall. Co-axial cable cover
field provided.
8
HP
208 V
230 V
460 V 575 V
3-6 ton
1/2
2.3
2.2
1.1
.65
7 1/2-8 1/2 ton
1
3.3
3.4
1.7
1.1
10-12 1/2 ton
2
6.6
6.6
3.3
2.4
For Modulating Power Exhaust Only
TUNING THE PI CONTROL
Once the PI is set up correctly, it needs to be tuned in order
to maintain the process setpoint. First, set the Integral Gain
to zero, and increase the Proportional Gain (parameter 64)
until the system becomes unstable, then lower the gain until
the system stabilizes the system. If only Proportional Gain
is used, and the system is operating in a steady-state condition (setpoint is fixed and process variable has settled to a
fixed value), there will always be a certain about of error in
the system. This is called the steady-state error.
Integral Gain (Parameter 65) is used to force the steadystat error to zero by increasing the output speed command
with respect to time. Over time, the error will be forced to
zero because the Integral term will continue to change the
speed command , even after the Proportional term reaches
steady state and no longer affects the speed command.
The Integral Gain affects the rate of rise of the output speed
command from the Integral term. Small amounts of Integral
Gain can cause large changes in PI performance, so car
must be taken when adjusting Integral Gain. Too much Integral Gain will result in overshoots, especially if large step
changes in error occur.
The other parameter setting that affects the response of the
PI control is Parameter 66 - PI ACC. This sets the acceleration (and deceleration) rate of the setpoint reference into the
PI unit. When the setpoint changes, this function will “filter”
the input to the PI unit by ramping the setpoint reference
from the pervious value to the new value. This will help
prevent overshoots that can setpoint, resulting in smoother
operation. If PI ACC is set to 0.0 seconds, it is effectively
disabled.
Parameter 55 is also frequently used.
P55 displays the level of the 0-10 VDC analog input signal
(in percent) at TB-5.
9
Modulating Power Exhaust
Motor Connections
Low Voltage
HIGH 460 V
LOW 230 V
200-240 V
L1
L2
G
L3
High Voltage
**Wire color can be substituted to
Red, White, Black, and Green
between the motors and VFD.
HIGH 460 V
LOW 230 V
460 V
G
L1
L2
L3
575 V
**Refer to
Diagram 1. Use
the formula on
page 6 and 7 to
determine
electrical
configuration.
L1
L2
G
Power Exhaust Static Data
X denotes factory settings
10
L3
Power Exhaust Static Data
11
W7212, W7213, W7214
Economizer Logic Modules
FOR VENTILATION CONTROL
PRODUCT DATA
FEATURES
• Operates from thermostat and DCV sensor to provide a
totally integrated control system.
• Solid state control package provides accurate, reliable
and stable control.
• Mounts on M7215 Motor or ductwork.
• Control can be tempered by DCV and fan cycling.
• Used with Honeywell actuators.
• Combines minimum and DCV maximum damper
position potentiometers with compressor staging.
• Solid state enthalpy or dry bulb changeover control.
• Terminals included for switching between Occupied
and Unoccupied operation.
• Terminals included for connecting optional S963B1128
Remote Potentiometer for remote minimum damper
position control.
• LED indicates when free cooling is available.
APPLICATION
W7212, W7213, and W7214 Economizer Logic Modules are
used with C7232 Demand Control Ventilation (DCV) Sensors,
and solid state C7400 Enthalpy Sensors or C7660 Dry Bulb
Temperature Sensors. All models proportion outdoor and
return air dampers for control of free cooling in commercial
HVAC equipment.
• LED indicates when module is in DCV mode.
• LED indicates when exhaust fan contact is closed.
• W7213 is used with heat pump B terminal.
• W7214 is used with heat pump O terminal.
Contents
Application ........................................................................ 1
Features ........................................................................... 1
Specifications ................................................................... 2
Ordering Information ........................................................ 2
Installation ........................................................................ 3
Operation .......................................................................... 5
Settings and Adjustments ................................................. 7
Checkout and Troubleshooting ......................................... 17
63-2596-05
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
SPECIFICATIONS
Models: W7212A, W7213A, W7214A Logic Modules: for use
with any Honeywell 2-10 Vdc actuator; includes DCV input;
adjustable exhaust fan setpoint.
NOTES:
—
—
All models include a minimum damper position
potentiometer, and setpoints for: enthalpy or
dry-bulb, occupied/unoccupied control, DCV
operation, and DCV maximum.
Occupied/Unoccupied overrides minimum
damper position setting when building is
unoccupied.
Dimensions: See Fig. 1.
Electrical Ratings:
Input Voltage: 24 Vac ±20%; 50/60 Hz (Class 2).
Nominal Power Consumption (at 24 Vac, 60 Hz): 11.5 VA.
Relay Contact Rating at 30 Vac (maximum power from class 2
input only): 1.5A run, 3.5A inrush.
Approvals:
Underwriters Laboratories Inc.: UL873 listed.
Flammability Rating: UL94-5VB.
Plenum Rated.
CE.
C-tick.
Accessories:
4074EJM Bag Assembly. Consists of: Checkout jumper,
620 ohm, 1.2K ohm, 5.6K ohm, and 6.8K ohm checkout
resistors.
C7046A Discharge Air Temperature Sensor.
C7150B Mixed Air Temperature Sensor.
C7232A,B Carbon Dioxide Sensors.
C7400 Solid State Enthalpy Sensor.
C7660 Dry Bulb Temperature Sensor.
S963B1128 Remote Potentiometer to provide remote control
of damper minimum position.
ST6008 Energy Management Timer for occupied/unoccupied
control.
IMPORTANT
All inputs and outputs must be 24 Vac Class 2.
4-3/8 (112)
Ambient Ratings:
Temperature: -40°F to +149°F (-40°C to +65°C).
Humidity: 5 to 95 percent RH (noncondensing).
1-5/8
(41)
Inputs:
Enthalpy (C7400): 2-wire (18,20,22 AWG) connection.
Dry Bulb Temperature (C7660): 2-wire (18,20,22 AWG)
connection.
Discharge Air (C7046): 2-wire (18,20,22 AWG) connection.
Mixed Air (C7150): 2-wire (18,20,22 AWG) connection.
DCV Sensor (C7232): 0/2-10 Vdc control signal;
100K ohm input impedance.
2-1/16
(53)
1-15/16
(49)
4-1/8
(104)
Outputs:
Actuator Signal: 2-10 Vdc.
Minimum Actuator Impedance: 1K ohm.
Exhaust Fan: Contact closure.
24 Vac Out: 25 VA maximum.
1/8 (4)
2-5/8 (66)
M20578A
Fig. 1. Logic module dimensions in in. (mm).
ORDERING INFORMATION
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number.
If you have additional questions, need further information, or would like to comment on our products or services, please write or
phone:
1. Your local Honeywell Automation and Control Products Sales Office (check white pages of your phone directory).
2. Honeywell Customer Care
1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386
In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Toronto, Ontario M1V 4Z9.
International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,
Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
63-2596—05
2
INSTALLATION
When Installing this Product...
1.
2.
3.
4.
Read these instructions carefully. Failure to follow
them could damage the product or cause a hazardous
condition.
Check the ratings given in the instructions and on the
product to make sure the product is suitable for your
application.
Installer must be a trained, experienced service
technician.
After installation is complete, check out product
operation as provided in these instructions.
Location and Mounting
The logic modules mount on an M7215 or a sheet metal duct
or panel. When planning the installation, allow enough
clearance for maintenance and service (see Fig. 1 for
dimensions). Mount device in a location protected from rain,
snow, and direct sunlight. Secure device to sheet metal using
the two supplied mounting screws, see Fig. 3.
CAUTION
Equipment Damage Hazard.
Mounting screws longer than 5/8 in. can damage
internal motor components.
When mounting the module to an M7215 use only the
included #6 5/8 in. thread-forming screw.
NOTE: See Fig. 4 for representative locations of connected
system devices.
M7215 DAMPER MOTOR
M20601
Fig. 3. Mounting the module on sheet metal.
C7400 Enthalpy Sensor and
C7660 Dry Bulb Temperature Sensor
W7212, W7213, W7214 Logic Modules accept signals from
either the C7400 Enthalpy Sensor or the C7660 Dry Bulb
Temperature Sensor. The wiring is the same for either sensor.
IMPORTANT
When using differential sensing, both sensors must
be of the same type (enthalpy or dry bulb).
OUTDOOR AIR SENSING
1. Mount sensor in any orientation exposing it to freely
circulating air while protecting it from rain, snow, and
direct sunlight.
2. Connect it to the SO and SO+ terminals of the device.
RETURN AIR SENSING
1. Ensure differential enthalpy control has a second
enthalpy sensor in the return air duct.
2. Connect this sensor to the SR and SR+ terminals.
3. Ensure sensor is mounted in the return air duct for
proper operation.
ECONOMIZER
LOGIC MODULE
Demand Control Ventilation
The DCV can be any sensor that provides a 0/2-10 Vdc output.
The DCV modulates the outdoor damper to provide ventilation
based on occupancy. The designer determines contaminants
to monitor, selects appropriate sensor, determines the sensor
threshold, and adjusts the DCV potentiometer accordingly. The
DCV LED lights when the DCV signal is above setpoint.
EXAMPLE:
5/8 INCH SCREW INCLUDED WITH LOGIC MODULE. M20717B
Fig. 2. Direct mounting of module.
3
CO2 sensor with 0 to 10 Vdc output range 0 to
2000 ppm. Zero (0) Vdc is equal to 0 ppm, 10
Vdc is equal to 2000 ppm, threshold is determined to be 800 ppm. DCV potentiometer to be
set at 4 Vdc.
63-2596—05
Mount the sensor according to the manufacturer specifications.
If not available, use the following guidelines:
1. Mount sensor in an area with unobstructed air
circulation.
2.
3.
Connect it to the AQ and AQ1 terminals of the W7212
(see Wiring section for details).
Adjust the DCV potentiometer setpoint to correspond to
DCV voltage output at the threshold.
SPACE
THERMOSTAT
DISCHARGE
AIR SENSOR
C7046A
DIRECT
EXPANSION
COIL
2
C7232
C7150B
W7212,
W7213,
W7214
DISCHARGE
AIR
2
1
MIXED AIR
SENSOR
INDOOR
FAN
DCV
SENSOR
ENTHALPY
SENSOR
C7400
HONEYWELL
ACTUATOR
OUTDOOR
AIR
1
C7400
1
2
ENTHALPY
SENSOR
FOR DIFFERENTIAL ENTHALPY, THE TWO C7400
ENTHALPY SENSORS ARE CONNECTED TO THE
ECONOMIZER LOGIC MODULE—ONE
IS MOUNTED IN RETURN AIR, AND THE OTHER IS
MOUNTED IN OUTDOOR AIR.
EXHAUST
FAN
USE EITHER MIXED AIR SENSOR OR DISCHARGE
AIR SENSOR, NOT BOTH.
RETURN AIR
EXHAUST AIR
M19547B
Fig. 4. Representative locations of connected economizer system devices.
Wiring
connection to the logic module O/B terminal. This terminal
alerts the logic module as to when the system operates in
cooling (the only time the economizer is used). During heating
applications with defrost make sure to break the connection to
the economizer using an isolation relay.
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
W7213 (CHANGEOVER TERMINAL B)
Connect the B terminal according to the following details:
— 24V power to B: System is in heating mode.
— No power to B: System is in cooling mode.
IMPORTANT
1. All wiring must comply with applicable local codes,
ordinances and regulations.
2. Refer to Table 1 for a list of the wiring diagrams and
corresponding Figure numbers in this document.
3. All device inputs and outputs must be 24 Vac Class 2.
4. Ensure proper polarity of sensor connections.
Incorrect polarity negates the sensor signal.
Optional Applications
Heat Pump Changeover (W7213, W7214 only)
In heat pump applications, the controller must have control of
the changeover valve. To provide the logic module with the
information necessary for proper information, there must be a
63-2596—05
4
W7214 (CHANGEOVER TERMINAL O)
Connect the O terminal according to the following details:
— 24V power to O: System is in cooling mode.
— No power to O: System is in heating mode.
Remote Minimum Position Control
Remote control of outdoor air dampers is desirable when
requiring temporary additional ventilation. The addition of a
S963B1128 Remote Potentiometer allows occupants to open
or close the dampers beyond minimum position for modified
ventilation. Connect the potentiometer as shown in Fig. 5.
IMPORTANT
— The minimum position signal takes priority over the
DCV maximum position signal. With DCV maximum
set below the minimum, the logic module signals the
actuator to maintain the minimum position.
— Freeze protection logic takes priority over all signals.
For details, see the notes in the Adjusting Minimum
and Maximum Positions section.
NOTE: For additional wiring applications, refer to the Design
and Application Guide for Honeywell Economizers
(form 63-8594).
Table 1. Applicable Wiring Diagrams.
Actuator
Honeywell MS7XXX
Honeywell M7215
n/a
Honeywell Series 72
Enthalpy Changeover
Single
Single or Differential
Comments
Single-stage cooling system.
Two-stage cooling system.
Single
n/a
Single or Differential
Two-stage heat pump system.
Direct mount Logic Module to Motor.
S963 remote damper control.
Honeywell Series 72.
OPERATION
The purpose of the economizer is to use outdoor air for
cooling, whenever possible, to reduce compressor operation.
Power at the N terminal determines the Occupied/Unoccupied
setting:
— W7212:
• 24 Vac (Occupied).
• No power (Unoccupied).
— W7213,W7214:
• 24 Vac (Unoccupied).
• No power (Occupied).
— See Fig. 8 through 14 for controller hookup.
NOTE: When module is operating in Occupied mode, the
minimum position is defined by the potentiometer.
When the module is operating in Unoccupied mode,
and there is no call for cooling, the damper drives fully
closed.
When wired as shown in Fig. 8 through 14, the logic module
responds to the cooling thermostat signal. The system uses
C7400 Solid State Enthalpy Changeover Sensor(s) or C7660
Dry Bulb Temperature Sensor(s). The C7400 responds to both
dry bulb temperature and humidity, allowing use of outdoor air
5
Figure
11
12
12
14
8
5
13
Economizer
W7212
W7213, W7214
W7212
W7212
at higher temperatures for free cooling when humidity is low.
The C7660 responds only to dry bulb temperature; use only in
dry, arid climates and only in single dry bulb changeover. Do
not use the C7660 in differential dry bulb applications.
The logic module functions as a true first stage of cooling
providing maximum energy economy during the cooling cycle.
It automatically locks out free cooling during heating; holding
the outdoor air damper at the minimum position setting.
The logic module can operate as either a basic free cooling
controller, or it can incorporate additional functions. Table 2
details the input/output (I/O) logic of the module.
S963B1128 REMOTE
POTENTIOMETER
CW
CLOSE
W
R
MINIMUM
POSITION
ADJUSTMENT
P1
B
P
CW
ECONOMIZER
M20603A
Fig. 5. S963B1128 Remote Potentiometer used with
logic module for remote damper control.
63-2596—05
Table 2. W7212 Economizer I/O Logic.
INPUTS
Enthalpy
OUTPUTS
a
Demand Control
Outdoor
Ventilation (DCV)
Below set
High
(DCV LED Off)
(Free Cooling LED Off)
Low
(Free Cooling LED On)
Above set
(DCV LED On)
N Terminalb
Compressor
Stage
Return Y1 Y2
1
Low
On On On
On Off On
Off Off Off
High
On On On
On Off Off
High
(Free Cooling LED Off)
Low
Low
(Free Cooling LED On)
High
Off
On
On
Off
On
On
Off
Off
On
Off
Off
On
Off
Off
Off
On
On
Off
On
Off
Off
Occupiedb
Unoccupiedb
Stage
2
Damper
On
Minimum position
Closed
Off
Off
Off
Modulatingc
Modulatingc
(between min. position (between closed and
Off
and full-open)
full-open)
Off
Minimum position
Closed
On
Modulatingd
Modulatingd
(between min. position (between closed and
Off
and DCV maximum)
DCV maximum)
Off
Off
Off
Off
Modulatinge
Modulatingf
a
For single enthalpy control, the module compares outdoor enthalpy to the ABCD setpoint.
Power at N terminal determines Occupied/Unoccupied setting:
• W7212: 24 Vac (Occupied), no power (Unoccupied).
• W7213,W7214: No power (Occupied), 24 Vac (Unoccupied).
c Modulation is based on the mixed air sensor signal.
d Modulation is based on the DCV signal.
e Modulation is based on the greater of DCV and mixed air sensor signals, between minimum position and either
maximum position (DCV) or fully open (mixed air signal).
f Modulation is based on the greater of DCV and mixed air sensor signals, between closed and either
maximum position (DCV) or fully open (mixed air signal).
b
NOTES:
—
—
—
63-2596—05
DCV and Free Cooling have setpoints and LED indications.
For models with a B terminal (W7213):
No power to B: cooling mode, free cool enabled. Module follows logic detailed above.
24V power to B: heating mode, free cool disabled. Actuator drives to minimum position (closed when Unoccupied).
For models with an O terminal (W7214):
24V power to O: cooling mode, free cool enabled. Module follows logic detailed above.
No power to O: heating mode, free cool disabled. Actuator drives to minimum position (closed when Unoccupied).
6
SETTINGS AND ADJUSTMENTS
NOTES:
—
CAUTION
—
Excessive force can damage potentiometer
controls.
Use a small screwdriver when adjusting enthalpy
changeover and minimum damper position controls.
Potentiometers with screwdriver adjustment slots, located on
device face, provide adjustments for several parameters
(see Fig. 6 for locations on device):
— DCV setpoint.
— Minimum damper position.
— DCV maximum damper position.
— Enthalpy changeover.
— Exhaust setpoint.
EXHAUST
FAN SETPOINT
LED LIGHTS
WHEN EXHAUST
CONTACT IS MADE
MINIMUM DAMPER
POSITION SETTING
MAXIMUM DAMPER
DEMAND CONTROL
VENTILATION SETPOINT
LED LIGHTS WHEN
DEMAND CONTROL
VENTILAION INPUT
IS ABOVE SETPOINT
N1
N
EXH
Set
10V
EXH
P1
P
Min
Pos
T1
2V
AQ1
2V
SO
SR+
SR
LED LIGHTS WHEN
OUTDOOR AIR IS
SUITABLE FOR
FREE COOLING
DCV
Max
10V
For detailed assistance in minimum position selection
reference the Economizer Application Guide (form 63-8594)
Ventilation section. The following provides basic guidelines for
minimum position selection and adjustment:
IMPORTANT
• Adjust the minimum position potentiometer to allow
the minimum amount of outdoor air for building effluents, as required by local codes, to enter the building.
• This procedure requires use of a quality thermometer
capable of reading to 0.5°F [0.25°C].
1.
DCV
AQ
Minimum Position Adjustment
NOTE: Make minimum position adjustments with at least a
10°F [6°C] temperature difference between outdoor
and return air.
Open
T
SO+
DEMAND CONTROL
VENTILAION SETPOINT
2V
DCV
Set
10V
2.
3.
4.
Free
Cool
B
C
A
D
ENTHALPY
CHANGEOVER SETPOINT
When the mixed air sensor takes control based on
an increased requirement for cooling, it overrides
the DCV maximum position potentiometer and can
drive the damper full-open.
If the mixed air temperature drops to 45°F, the
mixed air sensor overrides the DCV and closes the
damper to protect from freezing the hot or chilled
water coils. Control returns to normal once the
mixed air temperature rises to 48°F. Some models
of the W7212 close the damper fully and others
close the damper to minimum position position.
5.
6.
M20604
Fig. 6. Potentiometer and LED locations (W7212 shown).
Demand Control Ventilation Setpoint
Calculate the appropriate mixed air temperature, see
Equation 1.
Disconnect mixed air sensor from terminals T and T1.
Place a jumper across terminals T and T1.
Ensure that either the factory-installed jumper is in place
across terminals P and P1 or, if remote damper position
is required, that it is wired according to Fig. 5 and turned
fully clockwise.
Connect 24 Vac across terminals TR and TR1.
Carefully adjust the potentiometer on the face of the
device with a small screwdriver until the mixed air
temperature reaches the calculated value.
NOTE: Ensure that the sensed air is well mixed.
The logic module modulates the outdoor damper to provide
ventilation based on the 0/2-10 Vdc DCV. With no cooling
signal, the DCV overrides the outdoor air damper when
ventilation requires additional outdoor air.
7.
Adjusting Minimum and Maximum Positions
The minimum position potentiometer maintains the minimum
outdoor air flow into the building during the occupied period.
The minimum position allows for the building effluents. The
DCV maximum position potentiometer allows the installer to
limit the amount of outdoor air flow into the building when the
DCV overrides the mixed air sensor and allows the proper
ventilation based on occupancy. Setting the DCV maximum
position of the damper prevents the introduction of large
amounts of hot or cold air into the space by preventing the
dampers from opening 100%. Set the DCV maximum position
at the maximum design occupancy.
IMPORTANT
With the DCV maximum position set below the
minimum position, the minimum position overrides the
maximum position (negating most DCV functions of
the logic module, as the damper cannot move).
7
If all minimum and maximum position adjustments are
complete, remove the T-T1 jumper and reconnect the
mixed air sensor.
Equation 1.Formula to aid minimum position adjustment.
 T O  OA  +  T R  RA  = T M
Where:
TO = Outdoor air temperature
OA = Percent of outdoor air
TR = Return air temperature
RA = Percent of return air
TM = Resulting mixed air temperature
NOTE: The following sample calculation uses only
Fahrenheit temperature.
EXAMPLE:
Assume local codes require 10% outdoor air during occupied conditions, outdoor air is 60°F and
return air is 75°F. Under these conditions, what is
the temperature of the mixed air?
 0.1  60°F  +  0.9  75°F  = 6.0°F + 67.5°F = 73.5°F
63-2596—05
Mixed air will be 73.5°F when OA is 60°F and RA is 75°F with
10 percent outdoor air entering the building.
NOTE: Turn the enthalpy setpoint potentiometer fully clockwise to the D setting.
DCV Maximum Position Adjustment
The logic module selects the lower enthalpy air (return or
outdoor) for cooling. For example, when outdoor air has lower
enthalpy than return air, the module calls to open the outdoor
air damper to bring in outdoor air for free cooling.
1.
2.
3.
4.
5.
Disconnect mixed air sensor from terminals T and T1
and short terminals T and T1.
Connect a jumper between terminals AQ and SO+.
Connect 24 Vac across terminals TR and TR1.
Adjust the potentiometer on the face of the device with a
screwdriver for desired maximum position.
If all minimum and maximum position adjustments are
complete, remove the T-T1 jumper and reconnect the
mixed air sensor.
Enthalpy Changeover Setpoint
The exhaust setpoint determines when the exhaust fan runs
based on damper position. When the exhaust fan call is made,
the module provides a 60 ±30 second delay before exhaust fan
activation. This delay allows the damper to reach the
appropriate position to avoid unnecessary fan overload.
NOTES:
—
Outdoor Enthalpy Changeover Setpoint
(Single Enthalpy)
The outdoor enthalpy changeover setpoint returns the outdoor
air damper to minimum position when enthalpy rises above its
setpoint. Enthalpy setpoint scale markings, located in the
device, are A, B, C, and D. See Fig. 7 for the corresponding
control point. The factory-installed 620-ohm jumper must be in
place across terminals SR and SR+. Temperature and humidity
points to the left of the selected curve will allow the dampers to
open for free cooling.
Differential Enthalpy Changeover Setting
Differential enthalpy control uses two C7400 Enthalpy Sensors
connected to one logic module. The logic module compares
outdoor air to return air.
63-2596—05
Exhaust Setpoint
8
—
EF and EF1 are 24V dry contacts only. An external
line voltage contactor is required to operate the
exhaust fan.
When the exhaust fan is deactivated the EF and
EF1 contacts open immediately.
Adjustable Exhaust Setpoint
These logic modules have an adjustable exhaust setpoint. This
potentiometer allows the installer to adjust the damper position
at which the EF and EF1 exhaust fan contacts are made.
NOTE: The 60 ±30 second delay allows the outdoor damper
to reach the exhaust setpoint prior to the EF and EF1
contacts being made.
46
85
90
95 100 105 110
(29) (32) (35) (38) (41) (43)
44
CONTROL CONTROL POINT
APPROX. °F (°C)
CURVE
AT 50% RH
73 (23)
A
70 (21)
B
67 (19)
C
63 (17)
D
IDI
UM
32
PE
R
30
U
70
(21)
16
18
55
(13) B
12
14
50
(10)
40
(4)
45
(7)
50
A
30
20
60
(16)
40
22
60
70
80
26
65
(18)
24
EN
T
HA
10
0
90
28
LP
Y—
BT
RE
LA
TIV
EH
36
75
(24)
PO
UN
34 D D
RY
TY
38
AI
R
(%
)
40
42
80
(27)
C
20
D
10
35
(2)
B A
D C
35
(2)
40
(4)
45
(7)
50
(10)
1
55
60
65
70
75
80
85
90
95 100 105 110
(13) (16) (18) (21) (24) (27) (29) (32) (35) (38) (41) (43)
APPROXIMATE DRY BULB TEMPERATURE— °F (°C)
1
HIGH LIMIT CURVE FOR W7210D, W7212, W7213, W7214, W7340B.
M11160C
Fig. 7. W7212, W7213, W7214 performance characteristics for enthalpy changeover settings.
9
63-2596—05
TR
TR1
24
Vac
HOT
24 Vac
COM
N1
N
MINIMUM POSITION
ADJUSTMENT
P1
C7150B MIXED
AIR OR C7046A
DISCHARGE
AIR SENSOR
P
24 VAC HOT
T1
+
–
T
2
AQ1
–
2-10 VDC CONTROL
SIGNAL INPUT
1
0/2-10 VDC
INDOOR AIR
SENSOR
24 VAC COM
5
AQ
+
SO+
3
4
EF
EF1
SO
SR+
M7215
SR
C7400
OUTDOOR
AIR
ENTHALPY
SENSOR
+
S
W7212
3
5
620 OHM
RESISTOR
L1
(HOT)
L2
EXHAUST
FAN
Y1
C
Y2
Y1
COOL 1
W2
Y2
COOL 2
W2
HEAT 2
W1
HEAT 1
W1
A2
A1
4
A2
G
A1
RH
G
FAN
RC
R
X
HVAC EQUIPMENT
TERMINAL STRIP
T7300/Q7300
THERMOSTAT
1
L1
(HOT)
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2
ENSURE THAT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. USE THE SAME
TRANSFORMER FOR T7300 AND ECONOMIZER.
3
FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD NOT BE REMOVED. DIFFERENTIAL ENTHALPY NOT RECOMMENDED FOR USE
WITH SINGLE-STAGE COOLING SYSTEMS OR SINGLE-STAGE COOLING THERMOSTATS.
4
T7300 TERMINALS A1 AND A2 ARE CONNECTED WHEN THERMOSTAT IS IN THE OCCUPIED MODE.
5
EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE.
Fig. 8. W7212 used with M7215 Damper Motor and T7300 Thermostat.
63-2596—05
2
L2
10
M20716D
TR
TR1
24
Vac
HOT
24 Vac
COM
N1
N
MINIMUM POSITION
ADJUSTMENT
P1
C7150B MIXED
AIR OR C7046A
DISCHARGE
AIR SENSOR
P
24 VAC HOT
T1
+
–
T
2
AQ1
–
2-10 VDC CONTROL
SIGNAL INPUT
1
0/2-10 VDC
INDOOR AIR
SENSOR
24 VAC COM
5
AQ
+
SO+
3
4
EF
EF1
SO
SR+
M7215
SR
C7400
OUTDOOR
AIR
ENTHALPY
SENSOR
+
S
W7212
4
5
620 OHM
RESISTOR
L1
(HOT)
L2
EXHAUST
FAN
Y1
C
Y2
Y1
COOL 1
W2
Y2
COOL 2
W2
HEAT 2
W1
HEAT 1
W1
AUX
3
A2
G
RH
G
FAN
RC
R
X
HVAC EQUIPMENT
TERMINAL STRIP
T7350
THERMOSTAT
2
L2
1
L1
(HOT)
1
2
ENSURE THAT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR.
THE SAME TRANSFORMER CAN BE USED FOR THE THERMOSTAT AND ACTUATOR.
3
IF SEPARATE HEATING AND COOLING TRANSFORMERS ARE USED, REMOVE JUMPER AT THERMOSTAT.
T7350 - TERMINAL “AUX” IS POWERED BY THE HEATING TRANSFORMER (RH).
IF POWERING THE ECONOMIZER TERMINAL “N” WITH THE THERMOSTAT TERMINAL “AUX”, BE SURE THE ECONOMIZER IS POWERED BY THE
SAME TRANSFORMER AS TERMINAL “AUX”. IF NOT, USE AN ISOLATION RELAY TO POWER “N”.
4
5
M13657
Fig. 9. W7212 used with M7215 Damper Motor and T7350 Thermostat.
11
63-2596—05
TR
TR1
24
Vac
HOT
24 Vac
COM
N1
N
MINIMUM POSITION
ADJUSTMENT
P1
C7150B MIXED
AIR OR C7046A
DISCHARGE
AIR SENSOR
P
24 VAC HOT
T1
+
–
T
2
AQ1
–
2-10 VDC CONTROL
SIGNAL INPUT
1
0/2-10 VDC
INDOOR AIR
SENSOR
24 VAC COM
5
AQ
+
SO+
3
4
EF
EF1
SO
SR+
M7215
SR
C7400
OUTDOOR
AIR
ENTHALPY
SENSOR
+
S
W7212
4
5
620 OHM
RESISTOR
L1
(HOT)
L2
EXHAUST
FAN
Y1
C
Y2
Y1
COOL 1
W2
Y2
COOL 2
W2
HEAT 2
W1
HEAT 1
W1
A
3
A
G
R
G
FAN
RC
R
X
HVAC EQUIPMENT
TERMINAL STRIP
TB7220 OR TB8220
THERMOSTAT
1
L1
(HOT)
1
2
THE SAME TRANSFORMER CAN BE USED FOR THE THERMOSTAT AND ACTUATOR.
3
IF SEPARATE HEATING AND COOLING TRANSFORMERS ARE USED, REMOVE JUMPER AT THERMOSTAT.
TB7220 - TERMINAL “A” IS POWERED BY THE COOLING TRANSFORMER (RC).
TB8220 - TERMINAL “A” IS POWERED BY THE HEATING TRANSFORMER (R).
IF POWERING THE ECONOMIZER TERMINAL “N” WITH THE THERMOSTAT TERMINAL “A”, BE SURE THE ECONOMIZER IS POWERED BY THE
SAME TRANSFORMER AS TERMINAL “A”. IF NOT, USE AN ISOLATION RELAY TO POWER “N”.
4
M13658
5 EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE.
Fig. 10. W7212 used with M7215 Damper Motor and TB7220 or TB8220 Thermostats.
63-2596—05
2
L2
12
~
3
4
F
TR1
24
Vac
HOT
24 Vac
COM
N
2
+
TR
N1
1
5
MINIMUM POSITION
ADJUSTMENT
P1
C7150B MIXED
AIR OR C7046A
DISCHARGE
AIR SENSOR
P
T1
+
1
0/2-10 VDC
INDOOR AIR
SENSOR
MS7XXX
HONEYWELL
ACTUATOR
–
T
AQ1
–
2
5
AQ
+
SO+
3
4
EF
EF1
SO
SR+
SR
C7400
OUTDOOR
AIR
ENTHALPY
SENSOR
+
4
W7212
3
620 OHM
RESISTOR
S
C
L1
(HOT)
L2
COOL 1
Y1
Y1
EXHAUST
FAN
Y2
5
W2
W1
W2
HEAT 2
W1
HEAT 1
FAN
DELAY
RELAY
G
RH
UNOCCUPIED
ST6008
TIMER
6
OCCUPIED
FDR
G
RC
FAN
FDR
R
X
HVAC EQUIPMENT
TERMINAL STRIP
THERMOSTAT
2
L2
1
L1
(HOT)
1
2
3
4
5
SEE WIRING DIAGRAMS FIGS 9 AND 10 FOR T7350 AND TB7220/TB8220.
6
TIME CLOCK IS AN OPTION TO USING OCCUPIED CONTACTS ON THE THERMOSTAT.
M13659
Fig. 11. W7212A used in single-stage cooling system with single enthalpy changeover and
Honeywell actuator and time clock for occupancy.
13
63-2596—05
TR
TR1
24
Vac
HOT
24 Vac
COM
N1
~
N
1
2
+
3
4
F
5
MINIMUM POSITION
ADJUSTMENT
P1
C7150B MIXED
AIR OR C7046A
DISCHARGE
AIR SENSOR
P
T1
+
1S
0/2-10 VDC
INDOOR AIR
SENSOR
MS7XXX
HONEYWELL
ACTUATOR
–
T
3
AQ1
–
1K
1
2K
2
5
AQ
+
SO+
3
4
EF
EF1
1S1
SO
SR+
SR
C7400
OUTDOOR
AIR
ENTHALPY
SENSOR
+
W7212
5
7
620 OHM
RESISTOR
S
C
Y1
COOL 1
Y2
COOL 2
W2
W2
HEAT 2
W1
W1
HEAT 1
Y1
W
Y2
R
T6031 AMBIENT
LOCKOUT
CONTROL
50 F SETPOINT
8
RH
RC
R
HVAC EQUIPMENT
TERMINAL STRIP
T7300 OR T874
THERMOSTAT
2
ENSURE THAT TRANSFORMER IS SIZED TO HANDLE THE EXTRA
LOAD OF THE ECONOMIZER AND ACTUATOR.
3
1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED
BY A 24 VAC INPUT.
4
FOR T7300 ONLY
5
FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE
REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO
SR AND SR+ FOR DIFFERENTIAL ENTHALPY.
FAN
FDR
X
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
UNOCCUPIED
6
ST6008
TIMER
9
OCCUPIED
FDR
G
1
EXHAUST
FAN
FAN
DELAY
RELAY
G
4
L1
(HOT)
L2
6
2
L2
1
L1
(HOT)
USE THE FOLLOWING CONTACTS INSTEAD OF TIMER
FOR T7300, USE A1 AND A2 TERMINALS.
FOR T7350 USE AUX TERMINAL.
FOR TB7220 OR TB8220 USE A TERMINAL
THE TERMINALS ARE CONNECTED WHEN THERMOSTAT IS IN THE OCCUPIED MODE.
7 EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE.
8 SEE WIRING DIAGRAMS FIGS 9 AND 10 FOR T7350 AND TB7220/TB8220.
9 TIME CLOCK IS AN OPTION TO USING OCCUPIED CONTACTS ON THE THERMOSTAT.
M13660
Fig. 12. W7212A used in two-stage cooling system with Honeywell Series 72 Actuator and time clock for occupancy.
63-2596—05
14
1
L2
2
L1
(HOT)
~
1
2
+
N1
3
4
F
5
C7150B MIXED
AIR OR C7046A
DISCHARGE
AIR SENSOR
0/2-10 VDC
INDOOR AIR
SENSOR
3
T1
+
–
–
2
5
AQ
+
SO+
3
4
EF
EF1
SO
SR+
SR
W7212
4
1
24 Vac
COM
AQ1
MS7XXX
HONEYWELL
ACTUATOR
L1
(HOT)
24
Vac
HOT
T
5
UNOCCUPIED
3
ST6008
7
TIMER
TR1
1
4
F
P
1
2
+
MINIMUM POSITION
ADJUSTMENT
P1
MS7XXX
HONEYWELL
ACTUATOR
~
TR
N
C7400
OUTDOOR
AIR
ENTHALPY
SENSOR
+
620 OHM
RESISTOR
5
S
OCCUPIED
L2
C
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
2
ENSURE THAT TRANSFORMER IS SIZED TO HANDLE
THE LOAD OF ALL ACTUATORS.
3
USE THE FOLLOWING CONTACTS INSTEAD OF TIMER
FOR T7300, USE A1 AND A2 TERMINALS.
FOR T7350 USE AUX TERMINAL.
FOR TB7220 OR TB8220 USE A TERMINAL
THE TERMINALS ARE CONNECTED WHEN THERMOSTAT
IS IN THE OCCUPIED MODE.
4
FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR
SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY
SENSOR IS ADDED TO SR AND SR+ FOR DIFFERENTIAL
ENTHALPY.
Y1
Y1
COOL 1
Y2
Y2
COOL 2
W2
W2
HEAT 2
W1
W1
HEAT 1
RH
FDR
G
FAN
FDR
X
R
THERMOSTAT
HVAC EQUIPMENT
TERMINAL STRIP
5
EF AND EF1 ARE DRY CONTACTS IN THE
LOGIC MODULE.
6
SEE WIRING DIAGRAMS FIGS 9 AND 10 FOR T7350
AND TB7220/TB8220.
7
TIME CLOCK IS AN OPTION TO USING OCCUPIED CONTACTS
ON THE THERMOSTAT.
6
EXHAUST
FAN
FAN
DELAY
RELAY
G
RC
L1
(HOT)
L2
L2
1
L1
(HOT)
M13661
Fig. 13. W7212 controlling parallel-wired Honeywell Series 72 Actuators and time clock for occupancy.
15
63-2596—05
~
1
2
+
5
3
O
4
F
TR
TR1
24
Vac
HOT
24 Vac
COM
N
MINIMUM POSITION
ADJUSTMENT
P1
5
P
T1
C7150B
DISCHARGE
AIR SENSOR
MS7XXX
HONEYWELL
ACTUATOR
0/2-10 VDC
INDOOR AIR
SENSOR
+
–
T
1
2
AQ1
–
4
AQ
+
SO+
3
5
EF
EF1
SO
SR+
SR
W7214
3
C7400
OUTDOOR
AIR
ENTHALPY
SENSOR
2
620 OHM
RESISTOR
+
S
A3
4
C
A2
Y1
Y1
COOL 1
Y2
Y2
COOL 2
W2
W2
HEAT 2
W1
W1
HEAT 1
G
G
FAN
RH
L1
(HOT)
L2
EXHAUST
FAN
L2
R
RC
1
L1
(HOT)
X
O
T7300
THERMOSTAT
5
O
HVAC EQUIPMENT
TERMINAL STRIP
1
2
3
FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A
C7400 ENTHALPY SENSOR IS ADDED TO SR AND SR+ FOR DIFFERENTIAL ENTHALPY.
4
T7300 TERMINALS A2 AND A3 ARE CONNECTED WHEN THERMOSTAT IS IN THE UNOCCUPIED MODE.
SEE FIGS. 9 AND 10 FOR T7350 AND TB7220/TB8220 WIRING.
5
W7213: B TERMINAL
W7214: O TERMINAL
M19618C
Fig. 14. W7213, W7214 controlling heat pump system.
63-2596—05
16
CHECKOUT AND TROUBLESHOOTING
W7212
Checkout requires a 9V battery, 620 ohm, 1.2K ohm,
5.6K ohm, and 6.8K ohm resistors. Use Table 3 and Fig. 15 for
checkout.
N1
N
2V
EXH
Set
10V
EXH
P1
P
Min
Pos
T1
1
DC VOLTMETER
CAUTION
Excessive force can damage potentiometer
controls.
Use a small screwdriver when adjusting enthalpy
changeover and minimum damper position controls.
Open
T
DCV
+
2V
AQ1
DCV
AQ
SO+
C7400
S
2V
SO
+
SR+
SR
Max
10V
DCV
Set
10V
Free
Cool
B
C
A
D
2
620 OHM RESISTOR
1 INSERT DC VOLTMETER BETWEEN AQ AND AQ1 FOR
CHECKOUT AND TROUBLESHOOTING.
2 JUMPER USED FOR SINGLE ENTHALPY CONTROL.
M20612
Fig. 15. Meter location for checkout and
troubleshooting (W7212 shown).
Table 3. Checkout for W7212, W7213, W7214 Economizers Connected to Honeywell Actuator.
Step
1.
Checkout Procedure
Proper Response
CHECKOUT PREPARATION
Disconnect power at TR and TR1.
All LED are off; Exhaust Fan contacts are open.
Disconnect devices at P and P1.
Jumper P to P1.
Place 5.6K ohm resistor across T and T1.
Jumper TR to 1.
W7212 only: Jumper TR to N.
If connected, remove C7400 Enthalpy Sensor from terminals SO and +.
Connect 1.2K ohm 4074EJM Checkout Resistor across terminals SO and +.
Put 620 ohm resistor across SR and +.
Set minimum position, DCV setpoint, and Exhaust potentiometers fully CCW.
Turn DCV maximum position potentiometer fully CW.
Set enthalpy potentiometer to D.
W7214 only: Jumper TR to O.
Apply power (24 Vac) to terminals TR and TR1.
2.
3.
DIFFERENTIAL ENTHALPY
Execute step one, Checkout Preparation.
—
Place 620 ohm resistor across SO and +.
—
Place 1.2K ohm resistor across SR and +.
Free cool LED turns on.
Remove 620 ohm resistor from SO and +.
Free cool LED turns off.
SINGLE ENTHALPY
—
Set enthalpy potentiometer to A (fully CCW).
Set enthalpy potentiometer to D (fully CW).
17
63-2596—05
Table 3. Checkout for W7212, W7213, W7214 Economizers Connected to Honeywell Actuator. (Continued)
Step
4.
5.
Checkout Procedure
Proper Response
DCV AND EXHAUST
—
Ensure terminals AQ and AQ1 are open.
LED for both DCV and Exhaust should be off.
Actuator drives fully closed.
Connect 9V battery positive to AQ and negative to AQ1.
LED for both DCV and Exhaust turn on.
Actuator drives to between 81 and 85 degrees open.
Turn Exhaust potentiometer CW until Exhaust LED turns off.
Exhaust LED turns off with potentiometer approximately 90 percent CW.
Actuator remains in position.
Turn DCV setpoint potentiometer CW.
DCV LED turns off with potentiometer at approximately 9V.
Turn DCV setpoint potentiometer CCW until Exhaust LED turns on.
Exhaust contacts close 30-90 seconds after Exhaust LED turns on.
Turn DCV setpoint potentiometer CW.
Exhaust LED turns off with potentiometer indication at approximately 9V.
Turn Exhaust potentiometer CCW until Exhaust LED turns on.
Exhaust contacts close 30-90 seconds after Exhaust LED turns on.
MINIMUM AND MAXIMUM POSITION
—
Connect 9V battery positive to AQ and negative to AQ1.
DCV LED turns on. Actuator drives to between 81 and 85 degrees open.
Turn DCV maximum position potentiometer to midpoint.
Turn DCV maximum position potentiometer to fully CCW.
Turn minimum position potentiometer to midpoint.
Turn minimum position potentiometer fully CW.
Actuator drives fully open.
W7212: Remove jumper from TR and N.
W7213, W7214: Jumper TR to N.
6.
7.
MIXED AIR INPUT
—
Set enthalpy potentiometer to A.
Remove 5.6K ohm resistor and jumper from T and T1.
Actuator drives fully open.
Remove jumper from T and T1 and leave open.
HEAT PUMP INPUT - W7213, W7214 ONLY
—
Set enthalpy potentiometer to A.
W7213: Jumper TR to B.
W7214: Remove jumper from TR and O.
63-2596—05
18
19
63-2596—05
Automation and Control Solutions
Honeywell International Inc.
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Golden Valley, MN 55422
Toronto, Ontario M1V 4Z9
customer.honeywell.com
® U.S. Registered Trademark
© 2009 Honeywell International Inc.
63-2596—05 M.S. Rev. 01-09
ll
C7660 Selectable Temperature
Sensor
FOR
ECONOMIZERS
FEATURES
Senses temperature of outdoor air and provides
a signal to economizer control with OK or not
OK to economize.
Selectable dip switch provides 8 change over
temperature options.
When temperature of outdoor air is below
change over temperature, the outdoor air
damper is opened to reduce the cooling load in
the building.
Provides 4 OR 20 mA output signal to
economizer control; At 4 mA not OK to
economize, 20 mA OK to economize.
Highly accurate microprocessor control.
Sensor is enclosed in a rugged,
corrosion-resistant plastic case.
Replaces C7650 temperature sensors and the
control function of temperature change over in
the economizer control.
GENERAL
C7660 Selectable Temperature Sensor is used with the
W7459, W7215, W7212, W7213 and W7214 Economizer
Controls. The economizer controls are mounted on an M7415/
M7215 Actuator. They permit the use of outdoor air as the first
stage of cooling in heating, ventilating and air conditioning
(HVAC) systems.
The C7660 Selectable Temperature Sensor is only to be
used with single temperature change over with the sensor
located in the outdoor air.
Contents
General ............................................................................1
Features............................................................................1
Specifications ...................................................................1
Ordering Information ........................................................2
Installation ........................................................................2
Operation .........................................................................3
63-2670EF-01
SPECIFICATIONS
5/16 (8)
Model: C7660 Selectable Temperature Sensor
Case: Duct mount
Temperature Sensing Element: Thermistor
Output Signal: 4mA not OK to economize, 20 mA OK to
economize
Operating Ambient Temperature Range: -40° to 149° F
(-40° to 65° C).
Shipping Temperature Range: -40° to 149° F (-40° to
65° C).
Supply Voltage: Power to sensor is supplied through
economizer or if not used with an economizer, logic power
input is 21.6 vdc ± 1.5 vdc.
Electrical Connections: Two 1/4 in. (6.4 mm) quick connect
terminals.
Approval: Underwriters Laboratories Inc. Flammability
Rating UL94-5V
M27634
1 (25)
Fig. 1. C7660 Selectable Temperature Sensor Dimensions
in in. (mm).
INSTALLATION
When installing this Product...
1.
Dimensions: See Fig. 1
Hysteresis: Hysteresis +/- 1F; Economizer Cut-in 1F below
setpoint, Cut-out 1F above setpoint
3.
4.
4.
Accuracy: ± 1° F
5.
6.
Read these instructions carefully. Failure to follow
them
could damage the product or cause a
hazardous condition.
Check the ratings given in the instructions and
on the product to make sure the product is
suitable for your application.
Installer must be a trained experienced
service technician.
After installation is complete, check out
product operation as provided in these
instruction.
Verify dip switch settings match desired changeover
outside air temperature.
Verify polarity of wiring connections from sensor to
controller is correct.
ORDERING INFORMATION
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number.
If you have additional questions, need further information, or would like to comment on our products or services, please write or
phone:
1. Your local Honeywell Automation and Control Products Sales Office (check white pages of your phone directory).
2. Honeywell Customer Care 1885 Douglas Drive North Minneapolis, Minnesota 55422-4386
In Canada–Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Toronto, Ontario M1V 4Z9. International Sales and
Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France, Germany, Japan,
Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
63-2670EF–01
2
C7660 SELECTABLE TEMPERATURE SENSOR
W7459 ECONOMIZER PACKAGE MOUNTED ON ACTUATOR
1
SEE W7459 SPECIFICATIONS FOR ADDITIONAL WIRING INFORMATION.
2
POLARITY OF SENSOR IS REQUIRED TO CONNECT + ON SENSOR TO + ON ECONOMIZER AND - ON SENSOR TO SO ON ECONOMIZER
3
ONLY ONE C7660 SENSOR CAN BE USED WITH AN ECONOMIZER FOR SINGLE DRY-BULB CHANGEOVER. DO NOT USE A SECOND C7660
SENSOR ON THE SR AND SR+ TERMINALS.
Fig. 2. Wiring Connections for C7660 Temperature Sensor.
CAUTION
1. Before beginning installation, disconnect power
supply to prevent electrical shock or equipment
damage.
2. When selecting the location, make sure the
sensor is not exposed to rain, snow or direct
sunlight.
Location
The C7660 Temperature Sensor can be mounted in any
position; however, the sensor must be installed where it is
exposed to freely circulating air but protected from rain and
direct sunlight.
Wiring
Disconnect power supply before beginning installation to
prevent electrical shock or equipment damage. All wiring must
comply with applicable codes and ordinances. Follow the
wiring information furnished by the equipment manufacturer or
see Fig. 2 for typical wiring hookups.
OPERATION
Temperature Change Over Control Setting
The temperature change over setpoint is made by changing
the setting on a 3-position dip switch through the cover of the
sensor. See Fig. 3 for temperature change over settings.
Operation
The C7660 Selectable Temperature Sensor is used with an
economizer control and damper actuator to proportion an
outdoor air damper in a ventilation system.
When outdoor air temperature is below the change over
setpoint, the sensor will provide a 20 mA signal to the
economizer with translate to OK to economize positioning the
damper open on a call for cooling. When the outdoor air is
above the change over setpoint, the sensor provides a 4 mA
signal to the economizer which translates to not OK to
economize and the outdoor damper drives to minimum
position.
The C7660 temperature sensors replace the control function
of the temperature changeover in the economizer control.
The A, B, C, D potentiometer on the economizer does not
control the changeover point when a C7660 sensor is used in
place of an enthalpy sensor. This potentiometer is only
adjusted when using a C7400 enthalpy sensor for single
enthalpy changeover. For single dry-bulb and differential
enthalpy set the potentiometer to —D“.
3 63-2670EF–01
The changeover temperature switch settings for the C7660
are shown in Fig. 3. Default and factory setpoint is 63° F.
Changeover on an economizer can operate in two basic
modes: 1) exclusive operation where either the economizer
or the mechanical cooling function, but not both OR 2)
integrated operation where the economizer and mechanical
cooling operate at the same time. Integrated operation
requires a two stage cooling thermostat. The integrated
control will provide the most energy savings.
For exclusive operation, the changeover set point needs to
allow mechanical cooling when the economizer can no longer
meet the cooling load requirement. The 63 degree F setting is
the most typical changeover set point for this type of control
but is dependent on the building and climate.
For integrated operation, the changeover should be just at or
just below the typical cooling setpoint expected in the zone
served. For example, if the cooling setpoint is 74 degrees F
or 75 degrees F, the changeover setpoint should be set at 73
degrees F.
DIP SWITCH CHANGEOVER
TEMPERATURE
POSITION
ON OFF 123
ON OFF 123
48ºF
53ºF
ON OFF 123
55ºF
ON OFF 123
58ºF
ON OFF 123
ON OFF 123
ON OFF 123
ON OFF 123
63ºF
68ºF
73ºF
78ºF
M27636
Fig. 3. C7660 Temperature Sensor Dip Switch Settings.
Automation and Control Solutions
Honeywell International Inc.
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Golden Valley, MN 55422
customer.honeywell.com
Toronto, Ontario M1V 4Z9
® U.S. Registered Trademark © 2008
Honeywell International Inc. 63-2670EF–01
M.S. 09-08
ll
ll
I&M011-10130_CXLdp:Layout 1
2/26/09
9:23 AM
Page 1
MODEL CXLdp DIFFERENTIAL
PRESSURE TRANSDUCER
INSTALLATION & MAINTENANCE SHEET
 WARNING! READ 
BEFORE INSTALLATION
1. GENERAL:
A failure resulting in injury or damage may
be caused by excessive overpressure, excessive vibration or pressure pulsation, excessive instrument temperature, corrosion of
the pressure containing parts, or other misuse. Consult Ashcroft Inc., Stratford, Connecticut, USA before installing if there are any
questions or concerns.
2. OVERPRESSURE:
Pressure spikes in excess of the rated overpressure capability of the transducer may
cause irreversible electrical and/or mechanical
damage to the pressure measuring and containing elements.
3. STATIC ELECTRICAL CHARGES:
Any electrical device may be susceptible to
damage when exposed to static electrical
charges. To avoid damage to the transducer
the operator/installer should follow proper ESD
(electrostatic discharge) protection procedures
before handling the pressure transducer.
4. USE IN LIFE SUPPORT DEVICES:
Ashcroft Inc. products are not authorized for
use as critical components in life support devices or systems without the express written
approval of the General Manager, Stratford Operations of Ashcroft Inc. As used herein:
1. Life support devices or systems are devices
or systems which, (a) are intended for surgical implant into the body, or (b) support or
sustain life, and whose failure to perform,
when properly used in accordance with instructions for use provided in the labeling,
can be reasonably expected to result in a
significant injury to the user.
2. A critical component is any component of a
life support device or system whose failure
to perform can be reasonably expected to
cause the failure of the life support device or
system, or to affect its safety or
effectiveness.
SPECIFICATIONS
INSTALLATION
Accuracy: (2) options,specified at time of order.
• ±0.8% span
- (±0.128ma for 4-20ma output units)
- (±0.08V for 0-10Vdc output units)
• ±0.4% Span
- (±0.064ma for 4-20ma units)
- (±0.04V for 0-10Vdc output units)
Mounting:
Output Signal: Specified at time of order.
• 4-20ma (For symmetric bidirectional ranges
0IW= 12ma)
• 0-10Vdc; 0-5Vdc User selectable option (For
symmetric bidirectional ranges 0IW= 5 or
2.5Vdc respectively).
Supply Voltage:
• 4-20ma: 12-36 Vdc (no regulation required)
(see Figure 1)
• 0-10Vdc (0-5Vdc User selectable option): 1436 Vdc or 24 Vac (+/- 20%)
Figure 1
Load Limitations 4-20mA Output
The transmitter
can be mounted
on a 35 mm DIN
rail or with #8 or
#10 screws using
the 4 mounting
holes provided.
Torque limits on
the mounting
holes provided is
6 inch-pounds.
(see Figure 3)
Figure 3
Use
#10
screw
or
Use #8
screw
Green LED
Zero Pot
Electrical Wiring:
1. Remove the terminal block on the front of the
transmitter.
2. Follow the terminal block label markings on the
CXLdp to identify the terminals;
• 4-20ma Ouput: The left, negative (-), and
right, positive (+) terminals are used, ignore
the center terminal which is not used. Connect the power supply positive lead to the
CXLdp positive terminal, connect the negative
power supply lead to the negative terminal of
the BCS 4-20ma input. Last, connect the (-)
negative terminal on the CXLdp to the (+)
positive BCS input.
Loop Resistance (Ω)
TING
Vmin = 12V+ [.022A*(RL)]
*includes a 10% safety factor
RL = RS + RW
RL = Loop Resistance (ohms)
RS = Sense Resistance (ohms)
RW = Wire Resistance (ohms)
ZERO
SPAN
–
+
Loop Supply Voltage (Vdc)
* F.S. pressure is equivalnt to the span of the transmitter (16mA).
Zero adjust
potentiometer
Span adjust
potentiometer
+
Reverse Wiring Protected
+ BCS –
POWER
– SUPPLY
Electrical Connection: unpluggable terminal block
accepts 12-26 AWG
Operating Temperature: 0-160°F
Enclosure: NEMA 1 Fire-retardant ABS Meets UL
94-5VA
DESCRIPTION
Weight: Approx. 2.5 oz.
The Ashcroft® Model CXLdp is a low differential
pressure transmitter to be used on clean, dry,
non-corrosive gases. It is available in two accuracy classes and its performance is traceable to
the U. S. National Institute of Standards and
Technology (NIST). The 8 or 4 located in the third
position of the product code distinguishes a 0.8%
from a 0.4% accuracy transmitter. Both unidirectional (e.g. 0 to +1.0 IW) or bi-directional (e.g.
±2.0 IW) models are available. A green LED located on the front of the transmitter indicates
power and operational status. The LED light intensity increases as pressure increases.
Pressure Connection Options: 1⁄4˝ Brass Barbs or 1⁄8
NPT Female Brass
Optional: 1⁄2˝ conduit
or plenum mounting bracket and
cover available as
separately ordered
kit – part number
101A213-01.
(see Figure 2)
• 0-10Vdc; 0-5Vdc Output: Follow label markings for terminal assignments; COM is for
Common (supply and output negative), VIN
is for supply positive and VOUT is for output
signal. The CXLdp Voltage Output unit is supplied as standard with 0-10 V output, to convert to 0-5 V output see following
instructions.
Figure 2
Ashcroft Inc. 250 East Main Street 06614, Tel: 203-378-8281 • Fax: 203-378-0499, All specifications are subject to change without notice.
© Copyright 2009. All sales subject to standard terms and conditions. www.ashcroft.com All rights reserved. I&M011-10130 AMR 1M 02/09
ZERO
Zero adjust
potentiometer
SPAN
Span adjust
potentiometer
COM VOUT VIN
I&M011-10130_CXLdp:Layout 1
2/26/09
9:23 AM
Page 2
MODEL CXLdp DIFFERENTIAL
PRESSURE TRANSDUCER
INSTALLATION & MAINTENANCE SHEET
- 0-10 Vdc Output: Product is supplied as
standard with 0-10 V output, see instruction
below to access the Voltage Output jumper.
- 0-5 Vdc Output: See below for proper
jumper selection. To convert the unit from a
0-10 V output to a 0-5 V output unit note the
following. Access the jumper by simultaneously pushing both housing tabs away from
the housing, see drawings under “General
Dimensions” for
details. Change
Figure 4
Jumper
jumper (orange)
(orange)
into position as
0-10 Vdc
shown below,
carefully reattach
housing cover.
When finished
mark check box
on front label in0-5 Vdc
dicating that the
unit now provides
a 0 – 5Vdc output.
Label Part No. 238A713-01
3. Firmly reinstall the terminal block plug to its
mating connector.
Set Up:
The transmitters are calibrated at the factory in the
vertical position. Mounting in the horizontal position can cause a zero shift of as much as ±1% F.S.
in ranges below 1 IW dp. Any minor zero offset can
be minimized using the zero adjust potentiometer
located on the front, left side of the instrument.
To find true zero differential pressure, pneumatically connect the high and low pressure connections together using the tubing provided with the
transmitter. The
Figure 5
barbed connection
accept 1⁄4˝ O.D. 1⁄8˝
I.D. tubing.
(see Figure 5)
When 1⁄8 NPT female brass fittings
are used, do not
exceed 60 inchpound torque force
on female NPT
fitting.
When connecting to
the NPT fittings, do
not apply torque to
the CXLdp fitting.
Use a 9⁄16˝ wrench to
hold the CXLdp.
(see Figure 6)
Figure 6
Zero potentiometer adjustment requires using a 3⁄32˝
or 2.5 mm slotted or phillips screwdriver. The tubing should remain in place until the transmitter is
to be connected to the BCS tubing system. (see
Figure 7)
GENERAL DIMENSIONS FOR
MODEL CXLdp (in inches)
MB2 1⁄4˝ BARB FITTINGS
"B2" 1/4 BARB FITTINGS
1.45
Zero and Span Potentiometers
.37
1.32
ÿ .20
Figure 7
ZERO
POWER
SPAN
Zero adjust
potentiometer
Span adjust
potentiometer
HI
LO
ZERO
SPAN
2.90
3.33
ÿ .16
HOUSING TABS (2)
Routine Maintenance:
1.89
The CXLdp is a very stable and reliable transmitter
incorporating a proven, micro-machined silicon capacitive sensor and a new, state-of-the-art application specific integrated circuit (ASIC).
All calibration and temperature compensation functions are done with a microprocessor and
digital routines.
To troubleshoot or verify performance, it is recommended to pneumatically connect the pressure
ports to each other and establish a zero offset
reading in the as-installed position. Adjusting zero
will not affect span calibration.
F01 1⁄8 NPT FEMALE FITTINGS
"01" 1/8 FEMALE NPT FITTINGS
1.45
.37
1.32
POWER
.56
Adjusting span should only be attempted when a
high accuracy pressure standard and high quality
electrical meter are able to be used.
HI
LO
ZERO
SPAN
2.90
3.33
1.89
DIN Rail Transmitter Removal:
In order to remove the transmitter when it is installed
on a DIN rail, it is necessary to first unplug the wiring
terminal block from the transmitter.
Insert a small slotted screwdriver into
the black plastic
clip extending
slightly below the
transmitter case.
(see Figure 8)
ASSEMBLED WITH 101A213-01
CONDUIT KIT
ASSEMBLED WITH 101A213-01 CONDUIT KIT
Figure 8
4.85
Next, raise the
screwdriver handle
up thereby forcing
the spring clip down.
If questions or concerns need to be addressed, our
Low Pressure Product Manager or Engineering
Personnel can be contacted at (203) 378-8281 or
visit our website at www.ashcroft.com.
2.06
R .88
.78
Ashcroft Inc. 250 East Main Street 06614, Tel: 203-378-8281 • Fax: 203-378-0499, All specifications are subject to change without notice.
© Copyright 2009. All sales subject to standard terms and conditions. www.ashcroft.com All rights reserved. I&M011-10130 AMR 1M 02/09

MicroMetl - MN Air Online

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