63-2596—09 - W7212, W7213, W7214 Economizer - Necc

63-2596—09 - W7212, W7213, W7214 Economizer - Necc
W7212, W7213, W7214
Economizer Logic Modules
FOR VENTILATION CONTROL
PRODUCT DATA
FEATURES
• Operates from thermostat and DCV (CO2) 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 (CO2) 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.
• On CO2 sensor failure defaults to DCV maximum
damper position for minimum position.
This feature was added with the series 2 version of the
product. See Table 1.
• W7213 is used with heat pump B terminal.
• W7214 is used with heat pump O terminal.
• W7212C is used for applications requiring low
temperature and humidity and has the “E” enthalpy
curve.
Contents
Application ........................................................................ 1
Features ........................................................................... 1
Specifications ................................................................... 2
Ordering Information ........................................................ 2
Installation ........................................................................ 3
Settings and Adjustments ................................................. 8
Checkout and Troubleshooting ......................................... 20
63-2596-09
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
SPECIFICATIONS
Models: W7212A, W7213A, W7214A Logic Modules: for use
with any Honeywell 2-10 Vdc actuator; includes DCV
(CO2) input; adjustable exhaust fan setpoint.
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.
NOTES:
—
IMPORTANT
All inputs and outputs must be 24 Vac Class 2.
—
—
All models include a minimum damper position
potentiometer, and setpoints for: enthalpy or
dry-bulb, occupied/unoccupied control, DCV
(CO2) operation, CO2 sensor failure mode and
DCV maximum (DCV MAX).
Occupied/Unoccupied overrides minimum
damper position setting when building is
unoccupied.
On CO2 sensor failure the damper outdoor
damper defaults to DCV maximum position. See
table 1 for economizer functions based on occupancy, CO2 input and damper positions for
adjustments of potentiometers for MIN POS and
DCV MAX. This feature was added with series 2
version of the product; series 1 does NOT default
to DCV MAX, series 1 defaults to MIN POS on
failure of CO2 sensor.
Ambient Ratings:
Temperature: -40°F to +149°F (-40°C to +65°C).
Humidity: 5 to 95 percent RH (noncondensing).
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 (CO2) Sensor (C7232): 0/2-10 Vdc control signal;
100K ohm input impedance.
Outputs:
Actuator Signal: 2-10 Vdc.
Minimum Actuator Impedance: 1K ohm.
Exhaust Fan: Contact closure.
24 Vac Out: 25 VA maximum.
Dimensions: See Fig. 1.
Electrical Ratings:
Input Voltage: 24 Vac ±20%; 50/60 Hz (Class 2).
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—09
2
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
3.
Approvals:
Underwriters Laboratories Inc.: UL873 listed.
Flammability Rating: UL94-5VB.
Plenum Rated.
CE.
C-tick.
4.
5.
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.
C7400A Solid State Enthalpy Sensor for use with W7212A,
W7213 and W7214.
C7400C for use with W7212C models.
C7660 Dry Bulb Temperature Sensor.
S963B1128 Remote Potentiometer to provide remote control of
damper minimum position.
ST6008 Energy Management Timer for occupied/unoccupied
control.
Installer must be a trained, experienced service
technician.
After installation is complete, check out product
operation as provided in these instructions.
When adding a CO2 sensor (DCV sensor) in the field,
the MIN POS and DCV MAX position potentiometers
must be adjusted by the installer. The MIN POS potentiometer must be closer to the fully CCW position that the
DCV MAX potentiometer for the damper to modulate
beteen the two settings on a call for DCV.
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.
4-3/8 (112)
1-5/8
(41)
NOTE: See Fig. 4 for representative locations of connected
system devices.
2-1/16
(53)
M7215 DAMPER MOTOR
1-15/16
(49)
4-1/8
(104)
ECONOMIZER
LOGIC MODULE
1/8 (4)
2-5/8 (66)
M20578A
Fig. 1. Logic module dimensions in in. (mm).
INSTALLATION
5/8 INCH SCREW INCLUDED WITH LOGIC MODULE. M20717B
Fig. 2. Direct mounting of module.
When Installing this Product...
1.
2.
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.
3
63-2596—09
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
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.
Demand Control Ventilation
The DCV CO2 sensor must provide a 2-10 Vdc output. Less
than 1Vdc input assumes a sensor failure and the action of the
outdoor air dampers defaults to < 1Vdc operation in Table 1.
The DCV (CO2) modulates the outdoor damper to provide
ventilation based on occupancy. The DCV setpoint
potentiometer is adjusted to provide ventilation based on the
output of the CO2 sensor. The DCV LED lights when the DCV
(CO2) signal is above setpoint. If the CO2 sensor should fail,
the W7212 will default to the DCV MAX position which is the
minimum position design for 100% occupancy of the space.
M20601
Table 1. W7212 Terminal Power and Action.
Fig. 3. Mounting the module on sheet metal.
Occupied
Terminal N has
24 VAC power
C7400 Enthalpy Sensor and
C7660 Dry Bulb Temperature Sensor
Yes
W7212, W7213, W7214 Logic Modules accept signals from
either the C7400 Enthalpy Sensor or the C7660 Dry Bulb
Temperature Sensor. The W7212A, W7213 and W7214
models are used with the C7400A sensor and the W7212C
models are used with the C7400C sensor. The wiring is the
same for either sensor.
IMPORTANT
When using differential sensing, both sensors must
be of the same type.
1 Vdc
Action with 24 VAC
power applied to W7212
(TR-TR1)
Drives to MIN POS
No
1 Vdc
No movement of motor
Yes
<1 Vdc
Drives to MIN POS or
DCV MAX (highest)
Nob
<1 Vdc
Drives to DCV MAX
Yes
>DCV set pt
Drives to up to MIN POS
or DCV MAX (highest)
No
>DCV set pt
Drives to DCV MAX
a <1
Vdc = no CO2 sensor or failed sensor; 1 Vdc = CO2 sensor working but below CO2 set point and CO2 sensor working and above set point.
b Economizer should be powered by fan, if fan is off economizer will spring return damper closed, if fan is on and no
occupancy damper will drive to DCV MAX position.
For differential dry bulb operation use two C7650 sensors. Note for referential dry bulb use only the C7660
dry bulb sensor for the most energy savings.
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.
63-2596—09
Input on
AQ-AQ1
terminalsa
4
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
Mount the CO2 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.
COMMERCIAL
THERMOSTAT
DISCHARGE
AIR SENSOR
C7046A
DIRECT
EXPANSION
COIL
2
C7232
W7212,
W7213,
W7214
C7150B
DCV
SENSOR
2
1
MIXED AIR
SENSOR
INDOOR
FAN
ENTHALPY
SENSOR
C7400
HONEYWELL
ACTUATOR
DISCHARGE
AIR
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
M19547C
Fig. 4. Representative locations of connected economizer system devices.
Wiring
Optional Applications
Heat Pump Changeover
(W7213, W7214 only)
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
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).
IMPORTANT
1. All wiring must comply with applicable local codes,
ordinances and regulations.
2. Refer to Table 2 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.
IMPORTANT
During heating applications with defrost, make sure to
break the connection to the economizer using an isolation relay.
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.
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.
5
63-2596—09
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
Table 2. Applicable Wiring Diagrams.
Actuator
Honeywell MS7XXX
Enthalpy Changeover
Comments
Figure
Single
Single-stage cooling system.
12
Single or Differential
Two-stage cooling system.
13
Two-stage heat pump system.
15
Direct mount Logic Module to Motor and 9
T7300 thermostat.
Economizer
W7212
W7213, W7214
Honeywell M7215
Single
n/a
n/a
S963 remote damper control.
6
Honeywell Series 72
Single or Differential
Honeywell Series 72.
14
W7212
Honeywell M7215
Single or Differential
With T7300 thermostat
9
W7212
Honeywell M7215
Single or Differential
With T7350 thermostat
10
Honeywell M7215
Single or Differential
With TB7220 or TB8220 thermostat
11
OPERATION
When wired as shown in Fig. 9 through 15, 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
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 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).
— See Fig. 9 through 15 for controller hookup.
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 (or if
using Demand Control Ventilation and the space CO2 level is
above the set point, the damper will be between the MIN POS
and DCV MAX position).
NOTE: When module is operating in Occupied mode, the
minimum position is defined by the potentiometers.
When the module is operating in Unoccupied mode,
and there is no call for cooling, the damper drives fully
closed.
63-2596—09
W7212
6
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
The logic module can operate as either a basic free cooling
controller, or it can incorporate additional functions. Table 3
details the input/output (I/O) logic of the module.
Table 3. W7212 Economizer I/O Logic.
INPUTS
OUTPUTS
Enthalpya
Demand Control
Ventilation (DCV)
Below set
(DCV LED Off)
Outdoor
High
(Free Cooling LED Off)
See Table 1 for
outdoor damper
Low
action if input on
(Free Cooling LED On)
AQ-AQ1 terminals
is 1Vdc or < 1Vdc.
This the fault for
CO2 sensor failure.
If no sensor or Vdc
input is added to
AQ-AQ1 terminals
then use the DCV
MAX potentiometer
to adjust the
minimum position.
Above set
(DCV LED On)
High
(Free Cooling LED Off)
Low
(Free Cooling LED On)
N Terminalb
Compressor
Stage Stage
Y2
1
2
Return Y1
Low
High
Low
High
On
On
On
On
On
Off
On
Off
Off
Off
Off
Off
On
On
On
Off
On
Off
Off
Off
Off
On
Occupiedb
Unoccupiedb
Damper
Minimum position
Closed
Off
Modulatingc
(between min. position
and full-open)
Modulatingc
(between closed and
full-open)
Off
Off
Minimum position
Closed
On
On
On
On
Off
On
Off
Off
Off
Off
Off
Modulatingd
(between min. position
and DCV maximum)
Modulatingd, g
(between closed and
DCV maximum)
On
On
On
Off
Modulatinge
Modulatingf
On
Off
Off
Off
Off
Off
Off
Off
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. If the CO2 sensor input (AQ-AQ1) terminals is < 1Vdc or the sensor has failed, the motor
will drive to MIN POS or DCV MAX which ever is highest.
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).
g
Modulation is based on the DCV signal, if the CO2 sensor input (AQ-AQ1) terminals is < 1Vdc or the sensor has failed, the motor
will drive DCV MAX in the occupied mode. When power is cut to the economizer (fan is off) then the damper will spring return
closed.
b
NOTES:
—
—
—
Power Exhaust, 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 or DCV MAX
whichever is the higher of the two. When power is
cut to the economizer (fan is off) then the damper
will spring return closed.
7
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 or DCV MAX
whichever is the higher of the two. When power is
cut to the economizer (fan is off) then the damper
will spring return closed.
63-2596—09
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
SETTINGS AND ADJUSTMENTS
established by ASHRAE standard 62.1. When used with a
CO2 occupancy sensor the minimum position will modulate
between the MIN POS pot setting and the DCV MAX pot
setting based on the CO2 input to the AQ-AQ1 terminals from
the CO2 sensor located in the space. When a CO2 sensor is
NOT USED with the unit, the OA dampers will modulate based
on the actions in Table 1. 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% during a call for additional ventilation. On a call for
cooling AND the OA is good for economizing, the unit will
override the DCV MAX setting and allow the dampers to drive
full open.
CAUTION
Equipment Damage Hazard.
Excessive force can damage potentiometer
controls.
Use a small screwdriver or the plastic tool provided
with the economizer when adjusting all potentiometers
located on the unit.
Potentiometers with screwdriver adjustment slots, located on
device face, provide adjustments for several parameters
(see Fig. 5 for locations on device):
— DCV setpoint.
— Minimum damper position.
— DCV maximum damper position.
— Enthalpy changeover.
— Exhaust setpoint.
IMPORTANT
With the DCV maximum position set below the
minimum position, the minimum position overrides the
maximum position with the series 2 units.
NOTES:
—
EXHAUST
FAN SETPOINT
LED LIGHTS
WHEN EXHAUST
CONTACT IS MADE
MINIMUM DAMPER
POSITION SETTING
N1
N
2V
EXH
Set
10V
P
Min
Pos
T1
MAXIMUM DAMPER
DEMAND CONTROL
VENTILATION SETPOINT
LED LIGHTS WHEN
DEMAND CONTROL
VENTILATION INPUT
IS ABOVE SETPOINT
Open
T
2V
AQ1
2V
SO
SR+
SR
LED LIGHTS WHEN
OUTDOOR AIR IS
SUITABLE FOR
FREE COOLING
ENTHALPY
CHANGEOVER SETPOINT
DCV
Max
10V
DCV
AQ
SO+
DEMAND CONTROL
VENTILATION SETPOINT
—
EXH
P1
DCV
Set
10V
Free
Cool
B
C
A
D
B
A
C
D
E
Minimum Position Adjustment
W7212C modules have
the "E" enthalpy curve
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:
M20604B
Fig. 5. Potentiometer and LED locations (W7212 shown).
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].
Demand Control Ventilation Setpoint
The logic module modulates the outdoor damper to provide
ventilation based on the 2-10 Vdc DCV input (AQ-AQ1
terminals). With no cooling signal, the DCV overrides the
outdoor air damper when ventilation requires additional
outdoor air.
NOTE: Make ventilation adjustments with at least a 10°F
[6°C] temperature difference between outdoor and
return air.
EXAMPLE: CO2 sensor with 2 to 10 Vdc output range 0 to
2000 ppm. Two (2) Vdc is equal to 0 ppm, 10 Vdc is equal to
2000 ppm, threshold is determined to be 1000 ppm. DCV
potentiometer to be set at 6 Vdc.
1.
Adjust the potentiometer with a small screwdriver by turning
the pot to the fully CCW then fully CW positions to determine
the end stops. Set the pot for 6 Vdc in the mid position.
Adjusting Minimum and Maximum
Positions
The minimum position is defined by the minimum outdoor air
flow required in the building during the occupied period. The
MIN POS and DCV MAX position potentiometers allow the
installer to set the proper ventilation based on occupancy
63-2596—09
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. Check the
label on the box for position of damper on freeze
protection. If the CO2 sensor should fail, the
W7212 defaults to DCV maximum, providing minimum ventilation for the maximum design occupancy.
2.
3.
8
Calculate the appropriate mixed air temperature, see
Equation 1.
Equation 1 will be used to set the damper positions for
MIN POS and DCV MAX. Without a DCV sensor connected to AQ-AQ1, use the MIN POS pot and this procedure to adjust the damper positions for minimum OA
when the space is occupied. When using a DCV sensor
you will need to set the MIN POS and DCV MAX positions using this procedure. DCV MAX will be the same as
the MIN POS above (without a DCV sensor) and the MIN
POS will lower than the DCV MAX %.
Disconnect mixed air sensor from terminals T and T1.
Place a jumper across terminals T and T1.
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
4.
5.
6.
will return the OA damper to minimum position (this is either
MIN POS if using a CO2 sensor or DCV MAX if a CO2 sensor
is NOT used).
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. 6 and the
MIN POS potentiometer is 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.
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.
NOTE: Ensure that the sensed air is well mixed.
7.
NOTE: Turn the enthalpy setpoint potentiometer fully clockwise to the D (or E setting for W7212C) setting.
If all minimum (MIN POS) and maximum position (DCV
MAX) adjustments are complete, remove the T-T1
jumper and reconnect the mixed air sensor.
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.
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
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: The following sample calculation uses only
Fahrenheit temperature.
EXAMPLE:
NOTES:
—
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
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
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.
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: If setting MIN POS and DCV MAX position, you will
need to adjust the MIN POS for the building effluent
(low occupancy) airflow and adjust the DCV MAX
using the minimum airflow for maximum occupancy.
NOTE: The 60 ±30 second delay allows the outdoor damper
to reach the exhaust setpoint prior to the EF and EF1
contacts being made.
Enthalpy Changeover Setpoint
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. 6. For
economizer applications using remote position potentiometers,
the action of the outdoor damper matches the MIN POS action
in Table 1.
Outdoor Enthalpy Changeover Setpoint
(Single Enthalpy)
Single enthalpy compares the outdoor air conditions to a set
A,B,C, or D (E) curve for humidity and temperature conditions.
The installer must set the onboard potentiometer to the desired
curve. The outdoor enthalpy changeover setpoint returns the
outdoor air damper to minimum position. Enthalpy setpoint
scale markings, located in the device, are A, B, C, and D for
the W7212A, W7213 and W7214. See Fig. 7 for the
corresponding control point. Enthalpy setpoint scale markings
for the W7212C are A,B,C,D and E. See Fig. 8 for the
corresponding control points. The factory-installed 620-ohm
jumper must be in place across terminals SR and SR+.
Temperature and humidity conditions to the left of the selected
curve will allow the dampers to open for free cooling,
temperature, and humidity conditions to the right of the curve
IMPORTANT
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).
9
63-2596—09
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
S963B1128 REMOTE
POTENTIOMETER
CW
CLOSE
W
R
MINIMUM
POSITION
ADJUSTMENT
P1
P
B
CW
ECONOMIZER
M20603A
Fig. 6. S963B1128 Remote Potentiometer used with
logic module for remote damper control.
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
42
(%
)
40
R
TY
AI
38
IDI
36
RY
UM
EH
LA
TIV
R
RE
PE
U
30
20
70
50
60
(16)
A
40
22
60
24
80
65
(18)
10
0
90
28
26
AL
PY
—
BT
32
PO
UN
34 D D
75
(24)
70
(21)
EN
TH
80
(27)
16
14
50
(10)
12
45
(7)
30
18
55
(13) B
C
20
D
40
(4)
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. W7212A, W7213, W7214 performance characteristics for enthalpy changeover settings.
63-2596—09
10
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
46
85
90
95 100 105 110
(29) (32) (35) (38) (41) (43)
44
CONTROL CONTROL POINT
CURVE
APPROX. °F (°C)
AT 50% RH
A
73 (23)
B
70 (21)
C
67 (19)
63 (17)
D
55 (13)
E
TY
UM
RE
LA
TIV
EH
32
PE
R
U
30
70
(21)
20
50
60
(16)
A
40
22
60
70
80
10
0
90
HA
65
(18)
24
EN
T
26
28
LP
Y—
BT
IDI
36
75
(24)
PO
UN
34 D D
RY
AI
38
R
(%
)
40
42
80
(27)
16
14
50
(10)
12
45
(7)
40
(4)
30
18
55
(13) B
C
20
D
E
10
35
(2)
E
35
(2)
40
(4)
45
(7)
50
(10)
B A
D C
1
55
60
75
80
85
90
95 100 105 110
65
70
(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, W7340C.
M23879A
Fig. 8. W7212C performance characteristics for enthalpy changeover settings
11
63-2596—09
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
+
–
T
2
AQ1
–
2-10 VDC CONTROL
SIGNAL OUTPUT
1
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
4
A1
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 COMMERCIAL THERMOSTAT IS IN THE OCCUPIED MODE.
5
EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE.
M20716F
Fig. 9. W7212 used with M7215 Damper Motor and T7300 Thermostat.
63-2596—09
2
L2
12
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
+
–
T
2
AQ1
–
2-10 VDC CONTROL
SIGNAL OUTPUT
1
2-10 VDC
INDOOR AIR
SENSOR
24 VAC COM
5
AQ
+
SO+
3
4
EF
EF1
SO
SR+
M7215
SR
C7400
OUTDOOR +
AIR
ENTHALPY S
SENSOR
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
2
L2
R
X
T7350
THERMOSTAT
HVAC EQUIPMENT
TERMINAL STRIP
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.
THE SAME TRANSFORMER CAN BE USED FOR THE COMMERCIAL 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
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.
5
EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE.
M13657B
Fig. 10. W7212 used with M7215 Damper Motor and T7350 Thermostat.
13
63-2596—09
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
TR
TR1
24
Vac
HOT
24 Vac
COM
N1
N
MINIMUM POSITION
ADJUSTMENT
P1
P
C7150B MIXED
AIR OR C7046A
DISCHARGE
AIR SENSOR
24 VAC HOT
T1
+
–
T
2
AQ1
–
2-10 VDC CONTROL
SIGNAL OUTPUT
1
2-10 VDC
INDOOR AIR
SENSOR
24 VAC COM
5
AQ
+
SO+
3
4
EF
EF1
SO
SR+
M7215
SR
C7400
OUTDOOR +
AIR
ENTHALPY S
SENSOR
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
TB7220 OR TB8220
THERMOSTAT
HVAC EQUIPMENT
TERMINAL STRIP
L1 1
(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.
THE SAME TRANSFORMER CAN BE USED FOR THE COMMERCIAL 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
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.
M13658B
5 EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE.
Fig. 11. W7212 used with M7215 Damper Motor and TB7220 or TB8220 Thermostats.
63-2596—09
2
L2
14
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
+
1
MS7XXX
HONEYWELL
ACTUATOR
2-10 VDC
INDOOR AIR
SENSOR
–
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
W2
HEAT 2
W1
W1
HEAT 1
UNOCCUPIED
FAN
DELAY
RELAY
G
RH
ST6008
TIMER
6
OCCUPIED
FDR
G
RC
FAN
FDR
R
X
HVAC EQUIPMENT
TERMINAL STRIP
COMMERCIAL
THERMOSTAT
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2
L2
1
L1
(HOT)
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
EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE.
5
SEE WIRING DIAGRAMS FOR T7350 AND TB7220/TB8220.
6
TIME CLOCK IS AN OPTION TO USING OCCUPIED CONTACTS ON THE COMMERCIAL THERMOSTAT.
M13659C
Fig. 12. W7212 used in single-stage cooling system with single enthalpy changeover and
Honeywell actuator and time clock for occupancy.
15
63-2596—09
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
+
1K
1S
MS7XXX
HONEYWELL
ACTUATOR
2-10 VDC
INDOOR AIR
SENSOR
–
T
3
AQ1
–
1
2K
2
5
AQ
+
SO+
3
4
EF
EF1
1S1
SO
SR+
SR
C7400
OUTDOOR +
AIR
ENTHALPY S
SENSOR
W7212
7
5
620 OHM
RESISTOR
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
FAN
FDR
4
R
X
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.
6
UNOCCUPIED
ST6008
TIMER
OCCUPIED
9
FDR
G
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
EXHAUST
FAN
FAN
DELAY
RELAY
G
1
L1
(HOT)
L2
2
L2
1
L1
(HOT)
6
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
COMMERCIAL THERMOSTAT.
M13660B
Fig. 13. W7212 used in two-stage cooling system with Honeywell Series 72 Actuator and time clock for occupancy.
63-2596—09
16
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
1
L2
2
L1
(HOT)
~
1
2
+
N1
3
F
5
C7150B MIXED
AIR OR C7046A
DISCHARGE
AIR SENSOR
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
4
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
COMMERCIAL THERMOSTAT IS IN THE OCCUPIED MODE.
Y1
Y1
COOL 1
Y2
Y2
COOL 2
W2
W2
HEAT 2
W1
W1
HEAT 1
4
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.
EF AND EF1 ARE DRY CONTACTS IN THE
LOGIC MODULE.
RH
FDR
G
FAN
FDR
X
R
COMMERCIAL
THERMOSTAT
HVAC EQUIPMENT
TERMINAL STRIP
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 COMMERCIAL THERMOSTAT.
EXHAUST
FAN
FAN
DELAY
RELAY
G
RC
L1
(HOT)
L2
L2
1
L1
(HOT)
6
M13661B
Fig. 14. W7212 controlling parallel-wired Honeywell Series 72 Actuators and time clock for occupancy.
17
63-2596—09
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
~
1
2
+
5
3
O
4
F
MINIMUM POSITION
ADJUSTMENT
P1
5
P
MS7XXX
HONEYWELL
ACTUATOR
TR
TR1
24
Vac
HOT
24 Vac
COM
N
T1
C7150B
DISCHARGE
AIR SENSOR
+
–
T
1
2-10 VDC
INDOOR AIR
SENSOR
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
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
T7300 TERMINALS A2 AND A3 ARE CONNECTED WHEN THERMOSTAT IS IN THE UNOCCUPIED MODE.
SEE T7350 AND TB7220/TB8220 WIRING.
5
W7213: B TERMINAL
W7214: O TERMINAL
M19618E
Fig. 15. W7213, W7214 controlling heat pump system.
63-2596—09
18
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
TR
TR1
(HOT) (COMMON)
1
W7459
3
SELECT
OPTION
UNDER
“THERMOSTAT
INSTALLER
SETUP”
SELECT
OPTION UNDER
“THERMOSTAT
INSTALLER
SETUP”
0400 = 2
0174 = E
0540 = 2
1
VISION 2
PRO IAQ 3
EIM
VISION 1
2
PRO
3
IAQ
C
COOL 1
Y1
Y2
G
R
COOL 2
FAN
1
COM
HOT
W7212
3
0400 = 2
0174 = E
0540 = 2
HVAC EQUIP
TERMINAL
STRIP
1 Y1
2
3 Y2
C
R G
RC
RH
TR TR1
(HOT) (COMMON)
N1 N
HVAC EQUIP
TERMINAL STRIP
1
2
3
C
R
RC
RH
Y1
Y2
G
V1
T2
EIM
C
Y1
COOL 1
COOL 2
Y2
G
R
FAN
COM
HOT
M29973
M29974
Fig. 17. Vision Pro IAQ with EIM connected to a W7212
Economizer (With Morning Warm-up Enabled)
Fig. 16. Vision Pro IAQ with EIM connected to a W7459
Economizer
19
63-2596—09
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
CHECKOUT AND
TROUBLESHOOTING
W7212
N1
N
Checkout requires a 9V battery, 620 ohm, 1.2K ohm,
5.6K ohm, and 6.8K ohm resistors. Use Table 4 and Fig. 18 for
checkout.
2V
EXH
Set
10V
EXH
P1
P
Min
Pos
T1
1
DC VOLTMETER
CAUTION
T
DCV
+
2V
AQ1
Equipment Damage Hazard.
Excessive force can damage potentiometer
controls.
Use a small screwdriver when adjusting enthalpy
changeover and minimum damper position controls.
Open
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. 18. Meter location for checkout and
troubleshooting (W7212 shown).
Table 4. Checkout for W7212, W7213, W7214 Economizers Connected to Honeywell Actuator.
Step
1.
Checkout Procedure
Proper Response
CHECKOUT PREPARATION FOR ECONOMIZING ONLY
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 (defaults to on board MIN POS potentiometer).
Place 5.6K ohm resistor across T and T1 (Blue sleeve- provides input to
economizer that the MAT is between 50-55F).
Jumper TR to 1 (call for cooling from the thermostat).
W7212 only: Jumper TR to N (places economizer in occupied mode).
If connected, remove C7400 Enthalpy Sensor from terminals SO and +.
Connect 1.2K ohm, from 4074EJM Checkout Resistor kit, (purple sleeve)
across terminals SO and + (makes OA enthalpy high).
Place 620 ohm resistor (white sleeve) across SR and + (makes return
enthalpy lower than OA).
Set MIN POS and DCV MAX potentiometers fully CCW.
Turn DCV setpoint potentiometer mid position (this sets the DCV ventilation
at approximately 1000 ppm).
Turn exhaust potentiometer to mid position (motor will be approximately 50%
open when the exhaust fan contacts make).
Set enthalpy potentiometer to D.
W7214 only: Jumper TR to O.
Apply power (24 Vac) to terminals TR and TR1.
63-2596—09
20
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
Table 4. Checkout for W7212, W7213, W7214 Economizers Connected to Honeywell Actuator. (Continued)
Step
2.
Checkout Procedure
Proper Response
DIFFERENTIAL ENTHALPY
Execute step one, Checkout Preparation.
—
Turn DCV MAX to mid position.
3.
Place 620 ohm resistor across SO and + (white sleeve resistor makes OA
enthalpy low).
—
Place 1.2K ohm resistor across SR and + (purple sleeve resistor makes RA
enthalpy high).
Free cool LED turns on; motor drives to approximately 45 degrees (half)
open.
Remove 620 ohm resistor from SO and +.
Free cool LED turns off; motor drives closed
SINGLE ENTHALPY
Execute step one, Checkout Preparation.
—
Turn DCV MAX to mid position.
4.
Set enthalpy potentiometer to A (fully CCW).
Free cool LED turns on; motor drives to approximately 45 degrees (half)
open.
Set enthalpy potentiometer to D or E for W7212C (fully CW).
Free cool LED turns off; motor drives closed
DCV AND EXHAUST
Execute step one, Checkout Preparation.
—
LED for both DCV and Exhaust should be off.
Turn DCV MAX to mid position.
Motor drives to mid position, 45 degrees open.
Turn MIN POS fully CW.
Motor drives fully open.
Turn MIN POS and DCV MAX to fully CCW.
Motor drives closed.
Turn DCV MAX to mid position.
Connect 9V battery positive to AQ and negative to AQ1.
LED for both DCV and Exhaust turn on.
Actuator drives to 45 degrees open.
Remove jumper from N terminal (economizer goes into not occupied mode). Motor remains at 45 degrees open.
Adjust DCV MAX towards CW.
Motor will move to position set by DCV MAX pot.
Adjust DCV MAX to fully CCW.
Motor will drive closed.
Reconnect jumper to N terminal.
Adjust DCV MAX and MIN POS pots.
Motor will drive to the most open position of the pots.
Adjust DCV MAX and MIN POS pots to fully CCW.
5.
Remove power from N terminal adjust MIN POS towards CW
Motor should not move.
Adjust DCV MAX towards CW.
Motor will move to position set by DCV MAX pot.
MINIMUM AND MAXIMUM POSITION
Execute step one, Checkout Preparation.
—
Connect 9V battery positive to AQ and negative to AQ1. Adjust DCV MAX
potentiometer to mid position.
DCV LED turns on. Actuator drives to 45 degrees open.
Turn DCV maximum position potentiometer to fully CCW.
Actuator drives fully closed.
Turn minimum position potentiometer to midpoint.
Actuator drives to 45 degrees open.
Turn minimum position potentiometer fully CW.
Actuator drives fully open.
Turn MIN POS to fully CCW.
Actuator drives fully closed.
W7212: Remove jumper from TR and N.
Actuator drives fully closed.
W7214: Jumper TR to O.
6.
MIXED AIR INPUT
Execute step one, Checkout Preparation.
—
Turn DCV MAX to mid position; set enthalpy potentiometer to A.
Free cool LED turns on.
Actuator drives to 45 degrees open.
Remove 5.6K ohm resistor (green sleeve) and place jumper from T and T1.
Actuator drives to 45 degrees open.
Remove jumper from T and T1 and leave open.
Actuator drives fully closed.
21
63-2596—09
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
Table 4. Checkout for W7212, W7213, W7214 Economizers Connected to Honeywell Actuator. (Continued)
Step
7.
Checkout Procedure
Proper Response
HEAT PUMP INPUT - W7213, W7214 ONLY
Execute step one, Checkout Preparation.
—
Turn DCV MAX to mid position; set enthalpy potentiometer to A.
Free cool LED turns on.
Actuator drives to 45 degrees open.
W7213: Jumper TR to B.
W7214: Remove jumper from TR and O.
Free cool LED turns off.
Actuator drives fully closed.
63-2596—09
22
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
23
63-2596—09
W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Toronto, Ontario M1V 4Z9
customer.honeywell.com
® U.S. Registered Trademark
© 2010 Honeywell International Inc.
63-2596—09 M.S. Rev. 03-10
Printed in U.S.A.
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