63-2596-2 - W7212, W7213, W7214 Economizer Logic

63-2596-2 - W7212, W7213, W7214 Economizer Logic
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.
• Relay functions with 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
• LED indicates when module is in DCV mode.
W7212, W7213, and W7214 Economizer Logic Modules are
used with C7232 Demand Control Ventilation (DCV) Sensors,
and solid state C7400 Enthalpy Sensors or C7650 Dry Bulb
Temperature Sensors. All models proportion outdoor and
return air dampers for control of free cooling in commercial
HVAC equipment.
• W7213 is used with heat pump B terminal.
• LED indicates when exhaust fan contact is closed.
• 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 ................................................. 6
Checkout and Troubleshooting ......................................... 15
® U.S. Registered Trademark
Copyright © 2004 Honeywell International Inc.
All Rights Reserved
N314
63-2596-2
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.
C7650 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 (C7650): 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, Scarborough, 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—2
2
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
INSTALLATION
M7215 DAMPER MOTOR
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.
W7212
ECONOMIZER
LOGIC MODULE
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
5/8 INCH SCREW INCLUDED WITH LOGIC MODULE. M20717A
Fig. 2. Direct mounting of module.
IMPORTANT
All wiring must agree with applicable codes,
ordinances and regulations.
Location and Mounting
The logic modules mount on 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.
3
M20601
Fig. 3. Mounting the module on sheet metal.
63-2596—2
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
Wiring
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.
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
RETURN AIR SENSING
1. Ensure differential enthalpy control has a second
sensor in the return air duct.
2. Connect this sensor to the SR and SR+ terminals.
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.
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. 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. Connect it to the AQ and AQ1 terminals of the W7212
(see Wiring section for details).
3. Adjust the DCV potentiometer setpoint to correspond to
DCV voltage output at the threshold.
C7400 Enthalpy Sensor and
C7650 Dry Bulb Temperature Sensor
W7212, W7213, W7214 Logic Modules accept signals from
either the C7400 Enthalpy Sensor or the C7650 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).
SPACE
THERMOSTAT
DISCHARGE
AIR SENSOR
C7046A
DIRECT
EXPANSION
COIL
2
C7232
W7212,
W7213,
W7214
INDOOR
FAN
C7150B
DCV
SENSOR
2
1
MIXED AIR
SENSOR
C7400
ENTHALPY
SENSOR
HONEYWELL
ACTUATOR
DISCHARGE
AIR
OUTDOOR
AIR
C7400
1
ENTHALPY
SENSOR
1
2
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
Fig. 4. Representative locations of connected economizer system devices.
63-2596—2
4
M19547A
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
Optional Applications
Heat Pump Changeover (W7213, W7214 only)
Remote Minimum Position Control
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
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).
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.
W7213 (CHANGEOVER TERMINAL B)
Connect the B terminal according to the following details:
— 24V power to B: System is in heating mode, free cool
disabled.
— No power to B: System is in cooling mode, free cool
available. Actuator operates according to W7213
Economizer logic. (See Table 2 for logic details.)
W7214 (CHANGEOVER TERMINAL O)
Connect the O terminal according to the following details:
— No power to O: System is in heating mode, free cool
disabled.
— 24V power to O: System is in cooling mode, free cool
available. Actuator operates according to W7214
Economizer logic. (See Table 2 for logic details.)
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
Enthalpy Changeover
Comments
Figure
Single
Single-stage cooling system.
9
Single or Differential
Two-stage cooling system.
10
Two-stage heat pump system.
13
W7212
12
Honeywell M7215
Single
Direct mount Logic Module to Motor.
8
n/a
n/a
S963 remote damper control.
5
Single or Differential
Honeywell Series 72.
11
Economizer
W7213, W7214
W7212
Parallel Wiring
Honeywell Series 72
OPERATION
The purpose of the economizer is to use outdoor air for
cooling, whenever possible, to reduce compressor operation.
When wired as shown in Fig. 8 through 11, the logic module
responds to the cooling thermostat signal. This system uses
C7400 Solid State Enthalpy Changeover Sensor(s) or C7650
Dry Bulb Temperature Sensor(s). The C7400 responds to
both dry bulb temperature and humidity, allowing use of
outdoor air at higher temperatures for free cooling when
humidity is low. The C7650 responds only to dry bulb
temperature; use only in dry, arid climates.
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.
W7212
NOTE: When module is operating in Occupied mode, the
minimum position is defined by the potentiometer.
When the module is operating in Unoccupied mode,
the minimum position is fully closed.
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.
5
63-2596—2
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
Table 2. W7212 Economizer I/O Logic.
INPUTS
Enthalpy
DCV
Outdoor
OUTPUTS
a
Compressor
Return
Below set
High
Low
(DCV LED Off) (Free Cooling LED Off)
b
Y1
Y2
On
On
b
1
On
2
On
Damper
Occupied
c
Unoccupiedc
Minimum position
Closed
On
Off
On
Off
Low
High
(Free Cooling LED On)
On
On
On
Off
On
Off
Off
Off
Above set
High
Low
(DCV LED On) (Free Cooling LED Off)
On
On
On
On
On
Off
On
Off
Modulatinge
Modulatinge
(between min. position (between closed and
and DCV maximum)
DCV maximum)
Low
High
(Free Cooling LED On)
On
On
On
Off
Modulatingf
On
Off
Off
Off
Modulatingd
Modulatingd
(between min. position (between closed and
and full-open)
full-open)
Modulatingg
a
For single enthalpy control, the module compares outdoor enthalpy to the ABCD setpoint.
If both stages of cooling are off, the system is off and the damper is at:
• Minimum position if DCV is below setpoint and system is Occupied.
• Closed if DCV is below setpoint and system is Unoccupied.
• Modulating if DCV is above setpoint.
c
Power at N terminal (relative to TR1) determines Occupied/Unoccupied setting:
• W7212: 24 Vac (Occupied), no power (Unoccupied).
• W7213,W7214: No power (Occupied), 24 Vac (Unoccupied).
d
Modulation is based on the mixed air sensor signal.
e
Modulation is based on the DCV signal.
f Modulation, 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).
g
Modulation, 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:
—
—
—
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 available. Module follows logic detailed above.
No power to O: heating mode, free cool disabled. Actuator drives to minimum position (closed when Unoccupied).
SETTINGS AND ADJUSTMENTS
EXHAUST
FAN SETPOINT
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.
— Maximum damper position.
— Enthalpy changeover.
— Exhaust setpoint.
Demand Control Ventilation Setpoint
LED LIGHTS
WHEN EXHAUST
CONTACT IS MADE
MINIMUM DAMPER
POSITION SETTING
EXH
N1
N
2V
EXH
P1
P
Min
Pos
T1
MAXIMUM DAMPER
DEMAND CONTROL
VENTILATION SETPOINT
LED LIGHTS WHEN
DEMAND CONTROL
VENTILAION INPUT
IS ABOVE SETPOINT
Open
T
2V
DCV
AQ
DCV
2V
DEMAND CONTROL
VENTILAION SETPOINT
DCV
Max
10V
AQ1
SO+
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 outdoor air.
Set
10V
Set
10V
SO
SR+
SR
LED LIGHTS WHEN
OUTDOOR AIR IS
SUITABLE FOR
FREE COOLING
ENTHALPY
CHANGEOVER SETPOINT
Free
Cool
B
C
A
D
M20604
Fig. 6. Potentiometer and LED locations (W7212 shown).
63-2596—2
6
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
Adjusting Minimum and Maximum Positions
The minimum position potentiometer maintains the minimum
outdoor air flow into the building during occupied period. 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. Setting the DCV
maximum position of the damper prevents the introduction of
large amounts of hot or cold air into the space.
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).
NOTES:
—
—
When the mixed air sensor takes control, it
overrides the DCV maximum position
potentiometer.
If the mixed air temperature drops to 45°F, the
mixed air sensor overrides the DCV and fully
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.
Minimum Position Adjustment
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, as required by
local codes, to enter the building.
NOTE: Make minimum position adjustments with at least a
10°F [6°C] temperature difference between outdoor
and return air.
1.
2.
3.
4.
5.
Calculate the appropriate mixed air temperature, see
Equation 1.
Disconnect mixed air sensor from terminals T and T1.
Ensure that either the factory-installed jumper is in place
across terminals P and P1 or, of 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.
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
IMPORTANT
This procedure requires use of a quality thermometer
capable of reading to 0.5°F [0.25°C].
7
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
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.
DCV Maximum Position Adjustment
1.
2.
3.
4.
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.
Enthalpy Changeover
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+.
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 instead of to a setpoint as it
does for single enthalpy.
NOTE: Turn the setpoint potentiometer fully clockwise to the
D setting.
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 outdoor air damper opens to bring
in outdoor air for free cooling.
Exhaust 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.
NOTE: EF and EF1 are dry contacts only. An external line
voltage contactor is required to operate the exhaust
fan.
Adjustable Exhaust Setpoint
These logic modules have an adjustable setpoint. This
potentiometer allows the installer to set the exhaust setpoint
at an actual damper position percentage open from fully
closed.
63-2596—2
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
46
85
90
95 100 105 110
(29) (32) (35) (38) (41) (43)
42
)
(%
R
TY
IDI
LA
32
TIV
EH
UM
AI
38
RY
RE
U
A
40
20
60
(16)
50
22
60
70
24
80
65
(18)
10
0
90
28
26
AL
PY
—
BT
70
(21)
30
PE
R
PO
UN
36
75
(24)
EN
TH
80
(27)
40
73 (23)
70 (21)
67 (19)
63 (17)
34 D D
A
B
C
D
44
CONTROL CONTROL POINT
CURVE
APPROX. °F (°C)
AT 50% RH
16
14
50
(10)
12
45
(7)
30
18
55
(13) B
C
20
D
40
(4)
10
35
(2)
1
B A
D C
35
(2)
40
(4)
45
(7)
50
(10)
55
60
65
75
80
85
90
95 100 105 110
70
(13) (16) (18) (21) (24) (27) (29) (32) (35) (38) (41) (43)
APPROXIMATE DRY BULB TEMPERATURE— °F (°C)
1
HIGH LIMIT CURVE FOR W6210D, W7210D, W7212, W7213, W7214.
M11160B
Fig. 7. W7212, W7213, W7214 performance characteristics for enthalpy changeover settings.
63-2596—2
8
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
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
+
ñ
T
2
AQ1
ñ
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
A3
A2
4
A3
G
A2
RH
G
FAN
RC
R
X
HVAC EQUIPMENT
TERMINAL STRIP
T7300/Q7300
THERMOSTAT
2
L2
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.
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 A3 ARE CONNECTED WHEN THERMOSTAT IS IN THE UNOCCUPIED MODE.
5
EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE.
M20716B
Fig. 8. W7212 used with M7215 Damper Motor.
9
63-2596—2
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
TR
TR1
24
Vac
HOT
24 Vac
COM
N1
~
N
1
2
MINIMUM POSITION
ADJUSTMENT
P1
+
3
4
F
5
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
5
W7212
C7400
OUTDOOR
AIR
ENTHALPY
SENSOR
3
+
620 OHM
RESISTOR
S
C
Y1
COOL 1
W2
W2
HEAT 2
W1
W1
HEAT 1
Y1
UNOCCUPIED
4
ST6008
TIMER
Y2
OCCUPIED
FAN
DELAY
RELAY
G
RH
L1
(HOT)
L2
EXHAUST
FAN
FDR
G
RC
FAN
FDR
R
X
2
L2
1
L1
(HOT)
HVAC EQUIPMENT
TERMINAL STRIP
T7300 THERMOSTAT
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.
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
FOR T7300, USE CONTACTS A3 AND A2 INSTEAD OF THE TIMER.
5
EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE.
M20606B
Fig. 9. W7212A used in single-stage cooling system with single enthalpy changeover and Honeywell Actuator.
63-2596—2
10
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
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
W7212
C7400
OUTDOOR
AIR
ENTHALPY
SENSOR
7
4
620 OHM
RESISTOR
+
S
UNOCCUPIED
6
ST6008
TIMER
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
OCCUPIED
L1
(HOT)
L2
EXHAUST
FAN
FAN
DELAY
RELAY
G
RH
FDR
G
RC
FAN
FDR
5
R
X
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.
3
1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED
BY A 24 VAC INPUT.
1
L1
(HOT)
HVAC EQUIPMENT
TERMINAL STRIP
T7300 OR T874
THERMOSTAT
1
2
L2
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.
5 FOR T7300 ONLY.
6 FOR T7300, USE CONTACTS A3 AND A2 INSTEAD OF THE TIMER.
7 EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE.
M20607B
Fig. 10. W7212A used in two-stage cooling system with Honeywell Series 72 Actuator.
11
63-2596—2
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
1
2
~
1
2
+
N1
3
TR
TR1
24
Vac
HOT
24 Vac
COM
N
4
F
5
MS7XXX
HONEYWELL
ACTUATOR
~
T1
+
0/2-10 VDC
INDOOR AIR
SENSOR
3
–
T
1
4
F
P
1
2
+
MINIMUM POSITION
ADJUSTMENT
P1
C7150B MIXED
AIR OR C7046A
DISCHARGE
AIR SENSOR
AQ1
–
2
5
AQ
+
SO+
3
4
EF
EF1
SO
5
SR+
MS7XXX
HONEYWELL
ACTUATOR
SR
W7212
4
UNOCCUPIED
3
ST6008
TIMER
1
C7400
OUTDOOR
AIR
ENTHALPY
SENSOR
+
620 OHM
RESISTOR
5
S
OCCUPIED
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
4
5
FOR T7300, USE CONTACTS A1 AND A2 INSTEAD OF
THE TIMER.
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.
EF AND EF1 ARE DRY CONTACTS IN THE
LOGIC MODULE.
Y1
Y1
COOL 1
Y2
Y2
COOL 2
W2
W2
HEAT 2
W1
W1
HEAT 1
L1
(HOT)
L2
EXHAUST
FAN
FAN
DELAY
RELAY
G
RH
FDR
FAN
G
RC
L2
FDR
X
R
T7300
THERMOSTAT
HVAC EQUIPMENT
TERMINAL STRIP
Fig. 11. W7212 controlling parallel-wired Honeywell Series 72 Actuator.
63-2596—2
12
1
L1
(HOT)
M20609B
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
~
B
1
4
TR
TR1
24
Vac
HOT
24 Vac
COM
N
2
+
P
4
F
MINIMUM POSITION
ADJUSTMENT
P1
3
T1
C7150B
DISCHARGE
AIR SENSOR
5
+
1
MS7XXX
HONEYWELL
ACTUATOR
0/2-10 VDC
INDOOR AIR
SENSOR
–
T
AQ1
–
2
4
AQ
+
SO+
3
5
EF
EF1
SO
SR+
SR
W7213
3
C7400
OUTDOOR
AIR
ENTHALPY
SENSOR
+
2
620 OHM
RESISTOR
S
A3
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
T7300
THERMOSTAT
HVAC EQUIPMENT
TERMINAL STRIP
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2
EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE.
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
W7213: B TERMINAL.
W7214: O TERMINAL.
M19614A
Fig. 12. W7213, W7214 controlling conventional system.
13
63-2596—2
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
~
1
2
O
+
3
4
TR
TR1
24
Vac
HOT
24 Vac
COM
N
4
F
MINIMUM POSITION
ADJUSTMENT
P1
5
P
T1
C7150B
DISCHARGE
AIR SENSOR
MS7XXX
HONEYWELL
ACTUATOR
+
1
0/2-10 VDC
INDOOR AIR
SENSOR
–
T
AQ1
–
2
4
AQ
+
SO+
3
5
EF
EF1
SO
SR+
SR
W7214
3
C7400
OUTDOOR
AIR
ENTHALPY
SENSOR
2
620 OHM
RESISTOR
+
S
A3
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
4
O
O
T7300
THERMOSTAT
HVAC EQUIPMENT
TERMINAL STRIP
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2
EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE.
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
W7213: B TERMINAL
W7214: O TERMINAL
M19618A
Fig. 13. W7213, W7214 controlling heat pump system.
63-2596—2
14
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
CHECKOUT AND TROUBLESHOOTING
Checkout requires a 9V battery, 620 ohm, 1.2K ohm,
5.6K ohm, and 6.8K ohm resistors. Use Table 3 and Fig. 14
for checkout.
W7212
EXH
N1
N
CAUTION
2V
Set
10V
EXH
P1
P
Equipment Damage Hazard.
Excessive force can damage potentiometer
controls.
Use a small screwdriver when adjusting enthalpy
changeover and minimum damper position controls.
Min
Pos
T1
1
DC VOLTMETER
Open
T
DCV
+
2V
Max
10V
AQ1
–
DCV
AQ
SO+
2V
S
DCV
Set
10V
SO
C7400
+
SR+
SR
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. 14. 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, 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.
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.
15
63-2596—2
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
Table 3. Checkout for W7212, W7213, W7214 Economizers Connected to Honeywell Actuator. (Continued)
Step
3.
4.
5.
Checkout Procedure
Proper Response
SINGLE ENTHALPY
Execute step one, Checkout Preparation.
—
Set enthalpy potentiometer to A (fully CCW).
Free cool LED turns on.
Set enthalpy potentiometer to D (fully CW).
Free cool LED turns off.
DCV AND EXHAUST
Execute step one, Checkout Preparation.
—
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 90 to 95 percent open.
Turn Exhaust potentiometer CW until Exhaust LED turns off.
Exhaust LED turns off with potentiometer at approximately 90 percent.
Actuator remains in position.
Turn DCV potentiometer CW.
DCV LED turns off with potentiometer at approximately 9V.
Actuator drives fully closed.
Turn DCV and Exhaust potentiometers CCW until Exhaust LED turns on.
Exhaust contacts close 30-120 seconds after Exhaust LED turns on.
MINIMUM AND MAXIMUM POSITION
Execute step one, Checkout Preparation.
—
Connect 9V battery positive to AQ and negative to AQ1.
DCV LED turns on. Actuator drives 90 to 95 percent open.
Turn DCV maximum position potentiometer to midpoint.
Actuator drives to between 20 and 80 percent open.
Turn DCV maximum position potentiometer to fully CCW.
Actuator drives fully closed.
Turn minimum position potentiometer to midpoint.
Actuator drives to between 20 and 80 percent open.
Turn minimum position potentiometer fully CW.
Actuator drives fully open.
W7212: Remove jumper from TR and N.
Actuator drives fully closed.
W7213, W7214: Jumper TR to N.
6.
7.
MIXED AIR INPUT
Execute step one, Checkout Preparation.
—
Set enthalpy potentiometer to A.
Free cool LED turns on.
Actuator drives to between 20 and 80 percent open.
Remove 5.6K ohm resistor and jumper from T and T1.
Actuator drives fully open.
Remove jumper from T and T1 and leave open.
Actuator drives fully closed.
HEAT PUMP INPUT - W7213, W7214 ONLY
Execute step one, Checkout Preparation.
—
Set enthalpy potentiometer to A.
Free cool LED turns on.
Actuator drives to between 20 and 80 percent open.
W7213: Jumper TR to B.
W7214: Remove jumper from TR and O.
Free cool LED turns off.
Actuator drives fully closed.
Automation and Control Solutions
Honeywell International
Honeywell Europe S.A.
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
Control Products
Honeywell Building
17 Changi Business Park Central 1
Singapore 486073
3 Avenue du Bourget
1140 Brussels
Belgium
63-2596—2
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario
M1V 4Z9
B.B. Rev. 1-04
Printed in U.S.A. on recycled
paper containing at least 10%
post-consumer paper fibers.
Honeywell Latin American
Region
480 Sawgrass Corporate Parkway
Suite 200
Sunrise FL 33325
www.honeywell.com
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