W7212 System

W7212 System
Solid State Economizer System
(CONSISTING OF: C7046C DISCHARGE AIR SENSOR OR C7150B MIXED AIR SENSOR,
C7232 OR C7632 CARBON DIOXIDE SENSOR, C7400A SOLID STATE ENTHALPY SENSOR OR
C7650 SOLID STATE TEMPERATURE SENSOR, M7215 DAMPER ACTUATOR AND
W7212, W7213 OR W7214 SOLID STATE ECONOMIZER LOGIC MODULE)
PRODUCT DATA
FEATURES
M7215
C7150
C7232B
C7150B Mixed Air Sensor is used with the M7215 Damper
Actuator to sense mixed or discharged air in rooftop packaged
air conditioning equipment.
• No setting or calibration required.
C7046
W7212/13/14
C7632A
C7046C Discharge Air Sensors have probe lengths of 8 in.
(203 mm) and nominal sensor resistance of 3000 ohms at
77°F (25°C).
• No setting or calibration required.
• Solid state components not affected by dust or dirt.
• Fast reacting.
• Rugged aluminum insertion probe.
C7400/C7650
APPLICATION
The Solid State Economizer System provides an economical
method of providing cooling air by incorporating outdoor air in
the first stage of cooling in heating, ventilating and air
conditioning (HVAC) systems. The Solid State Economizer
System consists of the C7046 Discharge Air Sensor, C7150
Mixed Air Sensor, C7232 or C7632 Demand Control
Ventilation (DCV) Sensor, C7400A Enthalpy Sensor or C7650
Dry Bulb Temperature Sensor, M7215 Damper Actuator, and
W7212 Solid State Economizer Logic Module.
C7232 and C7632 DCV Sensors are stand-alone carbon dioxide (CO2) sensors for use in determining ventilation necessity
with heating ventilation and air conditioning (HVAC) controllers. They measure the CO2 concentration in the ventilated
space or duct. They are used in HVAC systems to control the
amount of fresh outdoor air supplied to maintain acceptable
levels of CO2 in the space.
• C7232 models available with LCD that provides sensor
readings and status information.
• Non-Dispersion-Infrared (NDIR) technology used to
measure carbon dioxide gas.
• Gold-plated sensor provides long-term calibration
stability.
• Device provides voltage output based on CO2 levels.
• C7232 models available with SPST relay output.
• Used for CO2 based ventilation control.
• Automatic Background Calibration (ABC) algorithm
based on long-term evaluation reduces required
typical zero-drift check maintenance.
• C7632 has fixed 0 to 10 Vdc from 0 to 2000 ppm. No
adjustments are necessary.
(Continued)
Contents
C7046C Discharge Air Sensors .......................................
C7150B Mixed Air Sensor ................................................
C7232 DCV Sensors ........................................................
C7400A Solid State Enthalpy Sensor ...............................
C7632A DCV Sensors ......................................................
C7650A Solid State Temperature Sensor .........................
M7215 Damper Motors .....................................................
W7212, W7213, W7214 Logic Modules ...........................
® U.S. Registered Trademark
© 2004 Honeywell International Inc.
All Rights Reserved
3
5
7
11
12
15
16
18
63-2576
SOLID STATE ECONOMIZER SYSTEM
C7400A Solid State Enthalpy Sensor and C7650A Solid State
Temperature Sensors are used with the W7212 Solid State
Economizer Logic Module to allow using outdoor air as the
first stage of cooling in HVAC systems.
• C7400A senses and combines temperature and
humidity of outdoor air (heat index).
• C7650A senses dry bulb temperature only.
• Long-lasting, solid state sensing element is accurate
and stable over time.
• When enthalpy/temperature of outdoor air increases,
the outdoor air damper closes to a preset minimum
position.
• When enthalpy/temperature of outdoor air is low, the
outdoor air damper opens to reduce the building
cooling load.
• Provides 4 to 20 mA output signal to the Economizer
Logic Modules; setpoint is located on economizer
control.
• Maximum economizer savings is achieved with two
C7400A Enthalpy Sensors connected to one
Economizer Logic Modules for differential enthalpy
changeover control.
M7215 Damper Motors are 25 lb-in. spring return damper
actuators that provide modulating control of economizer systems, ventilation dampers and combustion air dampers used
in residential or commercial HVAC equipment.
• M7215 Damper Motors provide modulating control of
economizer dampers from a 2-10 Vdc controller.
• Quiet, high efficiency drive motor.
• High impact, glass-fiber reinforced plastic case is
rugged, lightweight and corrosion resistant.
• Provides 2-10 Vdc output signal proportional to the
shaft position.
W7212 Economizer Logic Modules are used with C7232
Demand Control Ventilation (DCV) Sensors, and solid state
C7400 Enthalpy Sensors or C7650 Dry Bulb Temperature
Sensors to proportion outdoor and return air dampers for control of free cooling in commercial HVAC equipment.
• 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.
• 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.
IMPORTANT
Specifications given in this publication do not include
normal manufacturing tolerances. Therefore, this unit
may not exactly match the listed specifications. Also,
this product is tested and calibrated under closely
controlled conditions and some minor differences in
performance can be expected if those conditions are
changed.
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.
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
IMPORTANT
All wiring must agree with applicable codes,
ordinances and regulations.
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.
63-2576
2
C7046C DISCHARGE AIR SENSORS
C7046C Discharge Air Sensors
SPECIFICATIONS
Location
Intended for use as a discharge sensor in rooftop applications.
Dimensions: See Fig. 1.
Mounting: Integral mounting flange requiring two No. 8 screws.
Sensing Element: Carbon type, thermistor-resistor element.
Maximum Ambient Temperature: 250°F (121°C).
Operating Temperature Range: 40 to 150°F (4 to 66°C).
Wiring Connections: 6 in. (152 mm) leadwires.
Performance Characteristics:
Reaction Time Constant with Air Approach Velocity of
500 ft/min (2 m/sec): 60 seconds.
8 (203)
1 (25)
1-1/2 (38)
6 (152)
1/16 (2)
3/4 (19)
3/8 (9)
FITTING
1
(25)
M17961
1/4 (6)
DIAMETER (2 HOLES)
Mounting
MOUNTING ON A FLAT DUCT OR PLENUM SURFACE (FIG. 2)
1. Cut a 3/8 in. (9.5 mm) hole in the duct or plenum
surface at the desired location.
2. Insert sensor probe into the duct or plenum until the
flange rests against the duct or plenum wall.
3. If necessary, use the flange as a template to mark
and drill two holes for No. 8 mounting screws.
4. Fasten the sensor to the duct or plenum surface
with two No. 8 sheet metal screws (not provided).
MOUNTING IN A JUNCTION BOX (FIG. 3)
1. Cut a 3/8 in. (9.5 mm) hole in the duct or plenum
surface at the desired location.
2. Remove the center rear knockout from the junction box
and insert the sensing probe through the knockout with
the flange flat against the outlet box.
3. Using the flange as a template, mark and drill two holes
in the junction box and the duct or plenum surface for
No. 8 mounting screws.
4. Insert sensor probe through both the junction box
knockout and the 3/8 in. (9.5 mm) hole drilled in the duct
or plenum and fasten the junction box and sensor to the
duct or plenum surface.
Resistance/Temperature (NTC):
Nominal Resistance: 3000 ohms at 77°F (25°C).
Nominal Sensitivity: 70 ohms per degree F (124 ohms per
degree C) at midrange.
2 (51)
The sensor should be located in the air duct or plenum where
it will sample an average air temperature. Avoid locations
where air stratification can cause sensing errors.
NEOPRENE
GASKET
SYSTEM DUCT
OR PLENUM
Fig. 1. C7046C Air Temperature Sensor dimensions
in in. (mm).
NO. 8 (4mm)
MOUNTING SCREWS
(NOT PROVIDED)
SENSOR
PROBE
NOTE: Sensor probe diameter is 1/4 in. (6 mm).
FLANGE
INSTALLATION
The sensor assembly (see Fig. 1) consists of an aluminum
sensor probe (element housed internally) with attached flange
that can be mounted on a flat duct or plenum surface, or in
a 2 in. by 4 in. (51 by 102 mm) junction box using two No. 8
screws. Connections to the sensor are made through two 6 in.
(152 mm) leadwires.
TO
APPROPRIATE
SYSTEM
COMPONENTS
M17962
CONNECT SENSOR
WIRES WITH TWO
WIRENUT CONNECTORS
(NOT PROVIDED)
Fig. 2. Mounting C7046 Air Temperature
Sensor on a flat duct or plenum surface.
3
63-2576
C7046C DISCHARGE AIR SENSORS
SENSOR
PROBE
STANDARD UTILITY
CONDUIT BOX
FLANGE
Connect low voltage wiring from the sensor to the appropriate
system component terminals using solderless connectors.
See Fig. 3.
NO. 8 (4mm)
MOUNTING
SCREWS (NOT
PROVIDED)
OPERATION
BLANK
FACEPLATE
(OPTIONAL)
CONNECTOR
LOCKNUT
AND
CONDUIT
The C7046C Air Temperature Sensors consist of a thermistor
sensing element mounted in a tubular probe. They are applied
at various locations throughout single zone and multizone
duct systems. The negative temperature coefficient (NTC)
characteristic of the thermistor element causes its resistance
to decrease as the sampled air temperature increases. This
resistance shift is balanced with other system sensor signals
by appropriate system logic panels to stabilize system control.
TO APPROPRIATE
SYSTEM
COMPONENTS
SYSTEM
DUCT OR
PLENUM
CHECKOUT
CONNECT SENSOR WIRES
WITH TWO WIRENUT
CONNECTORS (NOT PROVIDED)
Allow the C7046 Air Temperature Sensor to soak in the air
moving through the duct or plenum for a minimum of five
minutes before taking a resistance measurement.
1. Disconnect the sensor leadwires from the associated
system components.
2. Connect an ohmmeter across the leadwires.
3. Assure nominal resistance measurements are in
accordance with the resistance/temperature curves
shown in Fig. 4.
4. Reconnect sensor leadwires to associated system
components.
5. Check operation of the complete control system.
Fig. 3. Mounting C7046 Air Temperature
Sensor in a junction box.
WIRING
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
17000
16000
15000
CAUTION
14000
IMPORTANT
1. All wiring must agree with applicable codes,
ordinances and regulations.
2. Do not mount sensor in incorrect environment.
3. Wire according to the applicable controller
instructions.
4. Erratic temperature readings from a sensor can be
caused by improper wiring practices. These must
be avoided to assure proper operation:
•Avoid poor wiring connections.
•Avoid intermittent or missing building earth ground.
•Do not mount sensor in incorrect environment.
63-2576
4
13000
12000
RESISTANCE (OHMS)
Erratic System Operation Hazard.
Failure to follow proper wiring practices can
introduce disruptive electrical interference (noise).
Keep wiring at least one foot away from large inductive
loads such as motors line starters, lighting ballasts,
and large power distribution panels.
Shielded cable is required in installations where these
guidelines cannot be met.
Ground shield only to grounded controller case.
11000
10000
9000
8000
7000
6000
5000
4000
3,000 OHMS
AT 77 F (25 C)
3000
2000
1000
10
-10
20
40
30
-5
0
5
50
10
60
15
70
20
80
25
TEMPERATURE (DEGREES)
90
30
100 F
35
C
M17969
Fig. 4. C7046C Sensor resistance vs. temperature.
C7150B MIXED AIR SENSOR
C7150B Mixed Air Sensor
SPECIFICATIONS
INSTALLATION
Models: See Table 1.
1.
Dimensions: See Fig. 5.
Install on a mounting bracket (not included) inside the
mixed air or discharge air duct using No. 8 mounting
screws and nuts. (See Fig. 6).
Mounting Arrangement:
Integral mounting flange that requires No. 8 screws.
NOTE: When mounting, ensure that terminals do not
touch metallic conductive surfaces.
2.
NOTE: The C7150B1004 requires four No. 8 screws;
the C7150B1046 requires two No. 8 screws.
Wire using 1/4 in. (6 mm) female quick-connect
terminated wires from C7150B to control inputs.
NOTE: For C7150B1046, splice additional wiring as
needed between sensor and connector.
Ambient Temperature Ratings:
Maximum: 250°F (121°C).
Operating Range: -40 to 110°F (-40 to 43°C).
Shipping Range: -30 to 150°F (-34 to 66°C).
NO. 8
MOUNTING
SCREW
Wiring Connection: 1/4 in. (6 mm) quick-connects.
TO APPROPRIATE
SYSTEM SENSOR
INPUT
NOTE: The C7150B1046 includes 4 in. lead wires with
connector for W7340 compatibility.
Table 1. C7150B Models.
Nominal Resistance
at 77°F (25°C)
Model
at midrange
C7150B1004 3000 ohms
70 ohms per °F
(124 ohms per °C)
C7150B1046 10K ohms
234 ohms per °F
(415 ohms per °C)
a Negative
DUCT
NOTE: Fig. 6 displays bracket (not included) and suggested
bracket dimensions in in. (mm).
3/4
(19)
OPERATION
1-1/2
(38)
The C7150B Air Temperature Sensor consists of a thermistor
sensing element mounted on a phenolic board. It is applied in
ventilation duct systems. The thermistor element negative
temperature coefficient (NTC) characteristic causes its
resistance to decrease as the sampled air temperature
increases. This resistance change is used as a control system
sensor to regulate discharge air temperature in a W973 Single
Zone System or damper position of the M7215A Motor (either
directly, or through the Economizer Logic Module).
3/16 (5) DIAMETER
2-3/8
(60)
2
(51)
2-1/2 (64)
2-1/4 (57)
1/2 (13)
Fig. 6. Mounting C7150B [C7150B1004 shown].
C7150B1046
3/4
(19)
3/8
(9)
M17938A
Temperature Coefficient (NTC).
C7150B1004
2 (51)
Nominal Sensitivitya
CHECKOUT
M17992
Fig. 5. C7150B approximate dimensions in in. (mm).
Allow the C7150B Sensor to soak in the air moving through
the duct for a minimum of 5 minutes before taking a resistance
measurement:
1. Disconnect sensor leadwires from associated system
components.
2. Connect an ohmmeter across the leadwires.
5
63-2576
C7150B MIXED AIR SENSOR
Nominal resistance measurements should be in
accordance with the resistance/temperature curves
shown in Fig. 7 and 8.
Reconnect sensor leadwires to associated system
components.
Check operation of the M7215A Motor, W973 System,
or the Economizer Logic Module.
4.
5.
17000
16000
15000
14000
45000
40000
35000
30000
25000
20000
15000
13000
12000
RESISTANCE (OHMS)
50000
RESISTANCE (OHMS)
3.
10,000 OHMS
AT 77 F (25 C)
10000
11000
5000
10000
9000
20
8000
7000
40
30
-5
0
5
50
10
60
15
70
20
80
25
90
30
TEMPERATURE (DEGREES)
100 F
35
C
M20071
6000
Fig. 8. C7150B1046 Sensor resistance temperature.
5000
4000
3,000 OHMS
AT 77 F (25 C)
3000
2000
1000
10
-10
20
40
30
-5
0
5
50
10
60
15
70
20
80
25
TEMPERATURE (DEGREES)
90
30
100 F
35
C
M17969
Fig. 7. C7150B1004 Sensor resistance temperature.
63-2576
6
C7232 DCV SENSORS
C7232 DCV Sensors
SPECIFICATIONS
Automatic Background Calibration (ABC) default: On.
Models: C7232 Sensor and Controller. A stand-alone carbon
dioxide (CO2) sensor with two jumper-adjustable outputs
(one analog and one spst relay).
C7232A: Wall mount model.
C7232B: Duct mount model.
Approvals:
CE.
Underwriters Laboratories Inc. Listed, File No. E4436.
cUL.
C7232B: Flammability Rating, UL94-5V.
C7232A: NEMA1.
C7232B: NEMA3.
NOTE: Models are available with or without a 4-digit LCD
that indicates the current CO2 concentration.
1
(25)
Dimensions:
C7232A: See Fig. 9.
C7232B: See Fig. 10.
KNOCKOUTS
FOR
EUROPEAN
APPLICATIONS
Sensor Performance Ratings:
Response Time: 2 min.
Carbon Dioxide Sensor:
Operation: Non-dispersive infrared (NDIR).
Sampling: Diffusion.
Range: 0 to 2000 ppm ±5% and ±50 ppm.
Annual Drift: 20 ppm (nominal).
2-3/8 (60)
STANDARD
UTILITY
CONDUIT
2-3/8
BOX
(60)
(2X4)
MOUNTING
HOLES
5-1/16
(128)
3-5/32 (80)
Electrical Ratings:
Power Supply: 24 Vac ±20%, 50/60 Hz (Class 2).
Maximum Power Consumption: 3W.
Peak Current (at 20 ms): 600 mA.
Relay:
Configuration: Shipped N.O. (reconfigure with software.)
Contact Rating: 1A at 50 Vac/24 Vdc.
Minimum Permissible Load: 1 mA at 5 Vdc.
Linear Analog Output:
Voltage: 0/2-10 Vdc (resistive load greater than
5000 ohms).
Current: 0/4-20 mA (resistive load less than 500 ohms).
M17540
Fig. 9. C7232A dimensions in in. (mm).
3-5/16 (84)
1-13/16
(46)
5-5/8
(142)
M17592
Outputs (Jumper Adjustable, see Table 3):
Analog: 0-10 Vdc (Default: 2-10 Vdc, 500 to 1500 ppm).
Relay: Normally Open Spst (Default: Close at 800 ppm).
1-5/8
(41)
8 (203)
Fig. 10. C7232B dimensions in in. (mm).
INSTALLATION
Ambient Ratings:
Temperature:
Operating: +32°F to +122°F (0°C to +50°C).
Storage: -4°F to +158°F (-20°C to +70°C).
Relative Humidity (non-condensing): 0 to 95 percent.
CAUTION
Health Hazard.
Improper use can create dangerous situations.
Use in application for sensing carbon dioxide only.
For life-safety applications, this device can function
only as a secondary or lesser device.
CO2 Pressure Dependence: 1.4% change in reading per
1 kPa deviation from 100 kPa.
Connections:
Wiring:
C7232A: 20-gauge cable with six 8 in. leadwires.
C7232B: 20-gauge cable with six 6 in. leadwires.
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
Mounting:
C7232A: Vertical surface with standard single-gang junction
box.
C7232B: Sheet metal duct with a sampling tube.
7
63-2576
C7232 DCV SENSORS
Location and Mounting
CAUTION
C7232 Sensors mount directly on the wall, sheet metal duct,
or a panel. When planning the installation, allow enough
clearance for maintenance and service. Mount the sensor in a
well-ventilated area.
Equipment Damage Hazard.
Electrostatic discharge can short equipment
circuitry.
Ensure that you are properly grounded before
handling the unit.
NOTES: Do not install the sensor where it can be affected by:
— drafts or dead spots behind doors and in corners.
— air from ducts.
C7232A Cover Removal/Replacement
Wall Mounting
C7232A Cover Removal (see Fig. 11)
1.
2.
3.
4.
5.
Remove button head socket cap screw and set it aside.
Insert the head of a small screwdriver into the slot at the
center and near the top of the cover.
Gently pull the handle down toward the bottom of the
device until a small gap between the subbase and the
cover appears.
Remove the screwdriver and pull the cover straight
down until it meets a stop.
Pull the cover straight off the subbase.
3.
NOTE: When mounting on a junction box, see Fig. 12.
3.
Replace the cover.
Duct Mounting (see Fig. 13)
C7232A Cover Replacement
1.
2.
The C7232 Wall Mount models can be mounted using two or
four screws:
1. Remove C7232 cover.
2. Mount the subbase to the wall using washers and two or
four screws (not supplied) appropriate for the wall
material.
Feed the wires through the opening in the subbase.
Place the cover, with a small gap at the top, flat on top
of the subbase.
When the cover rests flat on the subbase, slide it
straight up until it latches in place.
1.
Place gasket on aspiration tube.
IMPORTANT
Ensure largest tab at tube control end is at the top.
2.
Insert tube into duct; attach using screws and washers.
IMPORTANT
Leakage into the duct or the C7232 box cover from
the room will skew the sensor readings. Ensure the
box cover and duct seal completely.
B
3.
Place o-ring on tube end; mount the control to the tube.
STANDARD UTILITY CONDUIT BOX
NO. 6 SCREW
BUTTON HEAD
SOCKET CAP
SCREW
A
M17541
FRONT
COVER
C
ALLEN TOOL
BUTTON HEAD
SOCKET CAP
SCREW
Fig. 11. C7232A cover removal.
SUBBASE
NO. 6 SCREW
M17542
Fig. 12. Junction box mounting (C7232A).
63-2576
8
C7232 DCV SENSORS
C7232
RED
24V
L1
(HOT)
L2
1
BLACK
OW
FL
+
ANALOG
OUT
YELLOW
BROWN
1
–
ORANGE
GREEN
POWER SUPPLY. PROVIDE
DISCONNECT MEANS AND
OVERLOAD PROTECTION
AS REQUIRED.
M17543
Fig. 14. Wiring the C7232.
OPERATION
Input Signal
The C7232 Sensors have an adjustable range. These ranges
are determined by the SW1 and SW2 jumper settings (see
Table 3).
M17591
Table 3. CO2 Range Jumper Settings
Fig. 13. Duct mounting (C7232B).
SW1
WIRING
The factory ships the device with the output default settings
shown in Tables 3 and 4. Set the jumpers and wire the device
(see Table 2 and Fig. 14).
SW2
Relaya (ppm)
AN (ppm)
On
On
0 to 1000
1000
On
Off
0 to 2000
1200
Offb
Onb
500 to 1500
800
Off
Off
500 to 2000
1200
a
When the level reaches this value, the contacts close; when
the level drops 100 ppm below this value, the contacts open.
b Setting when shipped from the factory.
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
Output Signal
The output signal can be adjusted for 0/2-10Vdc or 0/4-20mA
(see Table 4).
CAUTION
Table 4. Output Signal Jumper Settings
Equipment Damage Hazard.
Electrostatic Discharge Can Short Equipment
Circuitry.
Ensure that you are properly grounded before
handling the unit.
OUT
AN
IMPORTANT
1. All low voltage connections to this device must be
24 Vac Class 2.
2. All wiring must comply with applicable local codes,
ordinances and regulations.
Wire Color
Designation
G+
Black
G0
24 Vac Common
Yellow
OUT1
Analog Output Signal
0-10Vdc
2-10Vdc
Current
0-20 mA
4-20 mA
—
Function
Red
24 Vac Hot
Brown
M
Analog Output Common
Orange
NO
Relay Output Normally Open
Green
COM
Relay Output Common
9
20-100%
Voltage
NOTES:
—
Table 2. C7232 Wiring Connections (see Fig. 14).
0-100%
On duct models, remove the screw holding the
board in place to view jumper settings on reverse.
(See Fig. 15.)
The CO2 settings and the output signal settings
are independent of each other. 0-100% and
20-100% are simply markings for the OUT jumper
settings on the sensor (to differentiate between
the two voltage and the two current ranges) and
do not refer to or alter the ppm range chosen.
63-2576
C7232 DCV SENSORS
AN
Voltage
Current
OFF
ON
OFF
ON
0 – 100%
20 – 100%
SW2SW1 OUT
M19424
Fig. 15. C7232 default jumper settings.
EXAMPLE
For a CO2 setting of 0-2000 ppm and a voltage output of 0-10 Vdc, the output would be as shown in Table 5 (arbitrary points
along the analog curve).
Table 5. 0-10 Vdc Output Example.
CO2 Level (ppm)
0
200
400
600
800
1000
1200
1400
1600
1800
2000
Voltage Output (Vdc)
0
1
2
3
4
5
6
7
8
9
10
For a CO2 setting of 0-2000 ppm and a voltage output of 2-10 Vdc, the output would be as shown in Table 6 (arbitrary points
along the analog curve).
Table 6. 2-10 Vdc Output Example.
CO2 Level (ppm)
Voltage Output (Vdc)
0
250
500
750
1000
1250
1500
1750
2000
2
3
4
5
6
7
8
9
10
CALIBRATION
CHECKOUT
Typically, calibration is unnecessary. No calibration kits are
available. However, if CO2 gas can be purged from the sensor
chamber using a general gas purge device, the sensor can be
rezeroed:
Perform a quick test of the unit with the unit powered:
1. Stand close to the unit and breathe air into the sensor.
2. Check the CO2 level registered by the controller to
ensure a strong rise.
3. When connected to a damper in a ventilation system,
the controller typically signals an increase in air flow.
IMPORTANT
Any CO2 present during calibration skews the sensor
zero level resulting in incorrect CO2 level reports.
1.
2.
3.
4.
Once the sensor stabilizes, use a screwdriver to
connect the two MENU soldering pads.
The display should indicate CAL.
Execute the zero calibration by connecting the two
ENTER soldering pads.
The display should return to providing the measured
CO2 level.
63-2576
10
C7400A SOLID STATE ENTHALPY SENSOR
C7400A Solid State Enthalpy Sensor
SPECIFICATIONS
OPERATION
Dimensions: See Fig. 16.
The C7400A Solid State Enthalpy Sensor is used with a solid
state economizer logic module and damper actuator to
proportion an outdoor air damper in a ventilation system.
Output Signal: 4 to 20 mA current signal increases from
4 mA to 20 mA as enthalpy decreases.
Each enthalpy control setpoint (A, B, C, and D) combines
temperature and humidity conditions, resulting in the control
curve shown in Fig. 34. When the enthalpy of the outdoor air
is below (left of) the appropriate curve, the outdoor air damper
can proportion open on a call for cooling. If the outdoor
enthalpy rises above (right of) the control curve, the outdoor
air damper closes to the minimum position.
Ambient Temperature Ranges:
Operating: 32°F to +125°F (0°C to +52°C).
Shipping: -40°F to +150°F (-40°C to +66°C).
Maximum Power Consumption: 0.50 VA at 24 Vdc.
Supply Voltage: 12 to 40 Vdc.
NOTE: Curves illustrate reset in temperature control point
due to changes in relative humidity.
Electrical Connections:
Two 1/4 in. (6 mm) quick connect terminals.
Approvals:
Underwriters Laboratories Inc. Flammability Rating: UL94-5V.
5/16 (8)
3-5/32
(80)
+
S
2-3/4
(70)
9/16
(14)
7/32
(6)
1 (25)
For differential enthalpy, turn the control setpoint to D (fully
clockwise
):
— If outdoor air enthalpy is lower than return air enthalpy, the
outdoor air damper proportions open on a call for cooling.
— If outdoor air enthalpy is higher than return air enthalpy, the
outdoor air damper closes to minimum position. Differential
enthalpy control provides energy savings and increased
comfort by using the air with the lowest enthalpy.
— If outdoor air enthalpy and return air enthalpy are equal, the
outdoor air damper proportions open on a call for cooling.
NOTE: The relationship between the C7400A Sensor output
current and relative humidity is shown in Fig. 17.
C7400A OUTPUT CURRENT
100
3-7/8 (96)
90
M9096
Fig. 16. Approximate dimensions of C7400A Solid State
Enthalpy Sensor in in. (mm).
80
4m
A
A
6m
A
8m
A
10 m
50
A
12 m
A
14 m
Location
60
A
16 m
A
18 m
A
INSTALLATION
20 m
PERCENT RF
70
40
IMPORTANT
When selecting the location, make sure the C7400A
Solid State Enthalpy Sensor is not exposed to rain,
snow or direct sunlight.
NOTES:
—
—
—
The C7400A 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, snow and direct sunlight.
Differential enthalpy control requires two C7400A
Sensors. Mount one sensor in the outdoor intake
duct, the other in the return air duct.
The C7400A Sensor is designed to operate in
500 ft/min. minimum airflow.
11
30
20
10
40
(4)
50
(10)
60
(16)
70
(21)
80
(27)
TEMPERATURE F ( C)
90
(32)
100
(38)
M22117
Fig. 17. C7400A Sensor output current vs. rh.
63-2576
C7632A DCV SENSORS
C7632A DCV Sensors
SPECIFICATIONS
Models: C7632 Sensor and Controller. A stand-alone carbon
dioxide (CO2) sensor with one 0-10 Vdc analog output.
C7632A: Wall mount model.
C7632B: Duct mount model.
3-3/8
(86)
4-1/8
(104)
Dimensions:
C7632A: See Fig. 9.
C7632B: See Fig. 10.
Ambient Ratings:
Temperature:
Operating: +32°F to +122°F (0°C to +50°C).
Storage: -4°F to +158°F (-20°C to +70°C).
Relative Humidity (non-condensing): 0 to 95 percent.
2-11/16 (68)
3-7/8 (99)
1-1/16
(27)
M19794
Fig. 18. C7632A dimensions in in. (mm).
Automatic Background Calibration (ABC) default: On.
3-5/16 (84)
Electrical Ratings:
Power Supply: 24 Vac ±20%, 50/60 Hz (Class 2).
Maximum Power Consumption:
Average: 1W.
Peak: 2W.
Peak Current (at 20 ms): 300 mA.
Linear Analog Output: 0-10 Vdc.
1-13/16
(46)
5-5/8
(142)
1-5/8
(41)
8 (203)
M19795
Mounting:
C7632A: Vertical surface with standard single-gang junction
box.
C7632B: Sheet metal duct with a sampling tube.
CO2 Pressure Dependence: 1.6% change in reading per
1 kPa deviation from 100 kPa.
Fig. 19. C7632B dimensions in in. (mm).
INSTALLATION
CAUTION
Output: Analog: 0-10 Vdc, 0-2000 ppm (fixed).
Sensor Performance Ratings:
Response Time: 2 min.
Carbon Dioxide Sensor:
Operation: Non-dispersive infrared (NDIR).
Sampling: Diffusion.
Range: 0 to 2000 ppm (fixed).
Annual Drift: ±10 ppm (nominal).
Accuracy: ±(30 ppm+2%) at normal temperature/pressure.
Wiring Connections:
C7632A: Terminal block.
C7632B: 20-gauge cable with three 6 in. leadwires.
Health Hazard.
Improper use can create dangerous situations.
Use in application for sensing carbon dioxide only.
For life-safety applications, this device can function
only as a secondary or lesser device.
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
CAUTION
Approvals:
CE.
Underwriters Laboratories Inc. Listed, File No. E4436.
cUL.
C7632B: Flammability Rating, UL94-5V.
C7632A: NEMA1.
C7632B: NEMA3.
Equipment Damage Hazard.
Electrostatic discharge can short equipment
circuitry.
Ensure that you are properly grounded before
handling the unit.
C7632A Cover Removal/Replacement
The cover of the C7632A is fixed by a latch on the underside
of the unit.
63-2576
12
C7632A DCV SENSORS
C7632A Cover Removal (see Fig. 11)
1.
2.
3.
4.
Duct Mounting (see Fig. 13)
Unless the device is mounted, hold the base using the
wiring hole and/or the perforated vent.
Depress the tab on the underside of the device.
Swing the cover away from the base.
Lift cover from base.
C7632A Cover Replacement
1.
2.
3.
Place top cover tab over the ridge along the base top.
Swing the cover down.
Press the lower edge of the case to latch.
Location and Mounting
1.
Place gasket on aspiration tube.
IMPORTANT
Ensure largest tab at tube control end is at the top.
2.
Insert tube into duct; attach using screws and washers.
IMPORTANT
Leakage into the duct or the C7632 box cover from
the room will skew the sensor readings. Ensure the
box cover and duct seal completely.
3.
Place o-ring on tube end; mount the control to the tube.
C7632 Sensors mount directly on the wall, sheet metal duct,
or a panel. When planning the installation, allow enough
clearance for maintenance and service. Mount the sensor in a
well-ventilated area.
NOTES: Do not install the sensor where it can be affected by:
— drafts or dead spots behind doors and in corners.
— air from ducts.
M19797
Fig. 21. Junction box mounting (C7632A).
OW
FL
M19796
Fig. 20. C7632A cover removal.
Wall Mounting (C7632A)
Mount the C7632A to the wall as follows:
1. Remove the C7632 cover.
2. Mount the device in a vertical position.
3. Mount the subbase directly on a wall using the type of
screws (not supplied) appropriate for the wall material.
4. Replace the cover.
Junction Box Mounting (Fig. 12)
M19798
Mount the C7632A to a junction box as follows:
1. Attach the wallplate using only the top screw.
2. Remove the C7632 cover.
3. Place the subbase on the wallplate hook.
4. Mount the subbase and wallplate to the junction box
using the lower screw.
5. Replace the cover.
Fig. 22. Duct mounting (C7632B).
WIRING (FIG. 14)
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
13
63-2576
C7632A DCV SENSORS
Zero Calibration
CAUTION
1.
2.
Equipment Damage Hazard.
Electrostatic Discharge Can Short Equipment
Circuitry.
Ensure that you are properly grounded before
handling the unit.
3.
NOTE: The device should now provide accurate output.
IMPORTANT
1. All low voltage connections to this device must be
24 Vac Class 2.
2. All wiring must comply with applicable local codes,
ordinances and regulations.
4.
5.
C7632B Wire Color
1.
2.
Function
G+
Red
24 Vac
G0
Black
Common
3.
CO2
Brown
Analog Output Signal
4.
5.
C7632
G0
L1
(HOT)
L2
1
CO2 G+
Remove the sensor cover and set it aside.
Ventilate the area and reduce occupancy to lower the
CO2 levels.
Maintain a reasonable proximity from the sensor to
avoid breathing on it, thus skewing calibration accuracy.
Keep the sensor in this environment for three to four
minutes.
Execute calibration by shorting the proper two soldering
pads (see Fig. 24).
NOTE: The device should now provide accurate output.
0-10 Vdc
1
Check the output signal. (See Checkout section.)
Reinstall the device.
Background Calibration
Table 7. C7632 Wiring Connections (see Fig. 14).
Designation
Remove the sensor cover and set it aside.
Apply a steady flow of CO2-free gas at 0.1 to 0.5 liter per
minute into the gas inlet tube located on the gold sensor.
Execute calibration by shorting the proper two soldering
pads (see Fig. 24).
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
6.
7.
Check the output signal. (See Checkout section.)
Reinstall the device.
M19799
ZERO
CALIBRATION
Fig. 23. Wiring the C7632.
BACKGROUND
CALIBRATION
Output (Table 5)
Table 8. 0-10 Vdc Output Signal.
CO2
Level 0
(ppm)
Voltage
Output 0
(Vdc)
200 400 600 800 1000 1200 1400 1600 1800 2000
M19856
1
2
3
4
5
6
7
8
9
Fig. 24. C7632 calibration pads.
10
CHECKOUT
CALIBRATION
Typically, calibration is unnecessary. No calibration kits are
available. However, if CO2 levels can be brought to a
desirable level, the sensor can be reset using either zero or
background calibration:
IMPORTANT
• With zero calibration, all CO2 present during
calibration skews the sensor zero level.
• Using background calibration, practical operation
(with a higher than zero level set) can be obtained.
Perform a quick test of the unit with the unit powered:
1. After calibration:
a. Check output signal immediately following proper
calibration (with minimum environmental change):
(1) Proper zero calibration: 0 Vdc.
(2) Typical background calibration: 2 Vdc. Depending
on ambient CO2 level, range: 1.75 to 2.5 Vdc.
b. If the output is incorrect, repeat calibration
procedure.
c. Otherwise, continue with checkout.
2. Stand close to the unit and breathe air into the sensor.
NOTE: When connected to a damper in a ventilation
system, breathing on the sensor typically
signals an increase in air flow.
3.
63-2576
14
Check the output to ensure a strong rise in CO2 level.
C7650A SOLID STATE TEMPERATURE SENSOR
C7650A Solid State Temperature Sensor
SPECIFICATIONS
5/16 (8)
Dimensions: See Fig. 25.
Case: Duct mount.
3-5/32
(80)
Temperature Sensing Element: Thermistor.
+
S
2-3/4
(70)
Output Signal:
10 to 20 mA current signal; increases from 10 mA to 20 mA
as temperature decreases.
Operating Ambient Temperature Range:
+40°F to +100°F (+4°C to +38°C).
9/16
(14)
7/32
(6)
1 (25)
Shipping Temperature Range:
-40°F to +150°F (-40°C to +66°C).
3-7/8 (96)
M9096
Fig. 25. C7650A Thermistor Temperature Sensor
Dimensions in in. (mm).
Maximum Power Consumption: 0.45 VA.
INSTALLATION
Supply Voltage: 15 to 23 Vdc.
Electrical Connections:
Two 1/4 in. (6.5 mm) quick connect terminals.
Location
Approval:
Underwriters Laboratories Inc. Flammability Rating: UL94-5V.
The C7650A 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.
The C7650A is designed to operate in 500 ft/min minimum
airflow.
Control Dial Setting
Control setpoint scale is located on the logic module. Control
points A, B, C, D are field selectable; use A, B, C, D control
points for temperature sensing.
15
63-2576
M7215 DAMPER MOTORS
M7215 Damper Motors
SPECIFICATIONS
Driving: 86 ±5 seconds.
Spring Return: 13 ±5 seconds.
25 lb-in. (2.8 N•m) torque, foot-mounted spring-return damper
motor with 2-10 Vdc feedback signal. Accepts 2-10 Vdc
control signal.
Dimensions: See Fig. 26.
Motor Rotation (Viewed From Shaft End):
Closed Position: Limit of clockwise rotation.
Open Position: Limit of counterclockwise rotation.
Crank Arm Rotation Limits: See Fig. 27.
Shipped with shaft in closed position.
Electrical Ratings:
Supply Voltage: 24 ±6 Vac 50/60 Hz.
Power Consumption:
24 Vac, 60 Hz: 8.7 VA.
24 Vac, 50 Hz: 8.4 VA.
Ambient Ratings:
Temperature:
Operating: -25°F to +125°F (-32°C to +52°C).
Storage: -30°F to +150°F (-34°C to +66°C).
Humidity: 5 to 95 percent relative humidity, noncondensing.
Torque:
Lift and Hold: 25 lb-in. (2.8 N•m).
Spring Return: 25 lb-in. (2.8 N•m).
Breakaway: 40 lb-in (4.5 N•m).
Terminal Connections: 1/4 in. (6 mm) quick-connect
terminals mounted on motor.
IMPORTANT
Never use motor continuously at the breakaway
torque rating.
Reliability:
Full-Stroke Cycles: 60,000.
Repositions: 1,500,000.
NOTE: NOTE:Breakaway torque available to overcome
occasional large loads such as a seized damper.
Approvals:
Underwriters Laboratory Inc.:
Flammability Rating: UL94-5V.
Component Recognized: File No. E4436, Guide No.
XAPX2, Vol. 9, Section 1, 7-25-83.
Shaft: Single-ended drive shaft with crank arm supplied.
Stroke:
Travel: 90°.
Timing:
4-1/2 (114)
1/4 (6)
1-3/8 (35)
4-1/32
(102)
4-1/2
(114)
4-1/2
(114)
3-1/8 (79)
5
(127)
7/16
(11)
2-1/4 (57)
3-1/2 (89)
1-1/4
(32)
5-3/16 (132)
TOP VIEW
SIDE VIEW
POWER END VIEW
Fig. 26. M7215 Damper Motor dimensions in in. (mm).
63-2576
16
M3851
M7215 DAMPER MOTORS
WIRING
CAUTION
MAXIMUM
OPEN
POSITION
1
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
MAXIMUM
CLOSED
POSITION
The M7215 Damper Motor accepts input from a 2-10 Vdc
controller. The motor can be checked out either directly or by
using a controller.
MOTOR MOUNTING SURFACE
1 CRANK ARM FIELD ADJUSTABLE IN 7.5 DEGREE INCREMENTS. M3850
IMPORTANT
1. If necessary, release one of the previously tightened
linkage connections to prevent damage.
2. Check for proper operation, making sure that the linkage does not bind and that the motor travels smoothly
throughout its cycle from fully open to fully closed.
Fig. 27. Limits of crank arm rotation.
INSTALLATION
NOTES: This motor checkout assures that:
1.
The motor operates the load.
2.
The motor responds properly to the controller.
3.
There is no linkage binding or motor stalling at
any point of travel.
4.
If questions arise regarding this product, contact
your distributor or local Honeywell representative.
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
CAUTION
DIRECT CHECKOUT
Personal Injury Hazard.
Spring-return assembly can release.
Leave end covers attached to the motor.
1.
2.
Location and Mounting
3.
Locate motor as close as possible to the equipment to be
controlled. Refer to Fig. 26 for mounting dimensions.
4.
1.
Mount motor with the shaft horizontal to ensure
maximum life.
5.
NOTE: Operation in other positions is possible when
required by the application.
2.
Remove crank arm (secured with two screws) from the
motor hub.
IMPORTANT
Position crank arm on hub so it does not strike motor
mounting surface during any portion of full stroke.
See Fig. 27.
3.
Reposition the crank arm to accommodate specific
damper requirements.
4.
5.
6.
CONTROLLER CHECKOUT
1.
2.
3.
4.
5.
6.
NOTE: Crank arm position is adjustable in eight
degree increments.
Mount the motor for the required application.
Check the damper position and make sure 24 Vac is
present across TR and TR1.
Apply 10 Vdc to IN+ and IN- to move damper to the
opposite position. The motor should drive the damper.
If the motor does not run, verify that the motor and crank
arm are properly installed for either clockwise or
counterclockwise rotation.
If installation is correct, but the motor does not run,
replace the motor.
Adjust controller setpoint to call for cooling. Observe the
motor.
If the damper is closed, it should begin to open.
If the damper remains closed, move controller setpoint
farther below room temperature.
If the damper still does not move, check for the
presence of 24 Vac in the input.
If 24 Vac is present and motor does not operate, reverse
controller leadwires to determine if device was miswired.
If the wiring is correct and 24 Vac is present on the input
terminals but the motor does not run, replace the motor.
Reconnect crank arm to the motor hub.
If there is an excess length of linkage rod, cut it to size.
Make necessary minor adjustments until desired
operation is obtained.
Tighten all nuts and set screws.
17
63-2576
W7212, W7213, W7214 LOGIC MODULES
W7212, W7213, W7214 Logic Modules
SPECIFICATIONS
4-3/8 (112)
For use with any Honeywell 2-10 Vdc actuator; includes DCV
input; adjustable exhaust fan setpoint.
NOTES:
—
—
1-5/8
(41)
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.
2-1/16
(53)
1-15/16
(49)
Dimensions: See Fig. 28.
4-1/8
(104)
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.
IMPORTANT
All inputs and outputs must be 24 Vac Class 2.
1/8 (4)
2-5/8 (66)
Ambient Ratings:
Temperature: -40°F to +149°F (-40°C to +65°C).
Humidity: 5 to 95 percent rh (noncondensing).
Fig. 28. Logic module dimensions in in. (mm).
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.
INSTALLATION
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. 28 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. 30.
Outputs:
Actuator Signal: 2-10 Vdc.
Minimum Actuator Impedance: 1K ohm.
Exhaust Fan: Contact closure.
24 Vac Out: 25 VA maximum.
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.
Approvals:
Underwriters Laboratories Inc.: UL873 listed.
Flammability Rating: UL94-5VB.
Plenum Rated.
CE.
C-tick.
63-2576
M20578A
NOTE: See Fig. 31 for representative locations of connected
system devices.
18
W7212, W7213, W7214 LOGIC MODULES
WIRING
M7215 DAMPER MOTOR
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
W7212
ECONOMIZER
LOGIC MODULE
IMPORTANT
1. All wiring must comply with applicable local codes,
ordinances and regulations.
2. All device inputs and outputs must be 24 Vac Class 2.
3. Ensure proper polarity of sensor connections.
Incorrect polarity negates the sensor signal.
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.
5/8 INCH SCREW INCLUDED WITH LOGIC MODULE. M20717A
Fig. 29. Direct mounting of module.
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
sensor in the return air duct.
2. Connect this sensor to the SR and SR+ terminals.
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.
M20601
Fig. 30. Mounting the module on sheet metal.
19
63-2576
W7212, W7213, W7214 LOGIC MODULES
SPACE
THERMOSTAT
DISCHARGE
AIR SENSOR
C7046A
DIRECT
EXPANSION
COIL
2
C7232
W7212,
W7213,
W7214
C7150B
DCV
SENSOR
2
1
MIXED AIR
SENSOR
INDOOR
FAN
C7400
ENTHALPY
SENSOR
HONEYWELL
ACTUATOR
DISCHARGE
AIR
OUTDOOR
AIR
1
C7400
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
M19547A
Fig. 31. Representative locations of connected economizer system devices.
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
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).
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 9 for logic details.)
NOTE: For additional wiring applications, refer to the Design
and Application Guide for Honeywell Economizers
(form 63-8594).
The purpose of the economizer is to use outdoor air for
cooling, whenever possible, to reduce compressor operation.
When wired as shown in Fig. 35, 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.
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 9 for logic details.)
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. 32.
63-2576
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.
20
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.
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.
W7212, W7213, W7214 LOGIC MODULES
The logic module can operate as either a basic free cooling
controller, or it can incorporate additional functions. Table 9
details the input/output (I/O) logic of the module.
S963B1128 REMOTE
POTENTIOMETER
CW
CLOSE
R
P
B
W
MINIMUM
POSITION
ADJUSTMENT
P1
CW
ECONOMIZER
M20603A
Fig. 32. S963B1128 Remote Potentiometer used with
logic module for remote damper control.
Table 9. W7212 Economizer I/O Logic.
INPUTS
OUTPUTS
Enthalpya
DCV
Outdoor
Compressor
Return
Below set
High
Low
(DCV LED Off) (Free Cooling LED Off)
Y1b Y2b
On
On
1
On
2
On
Damper
Occupiedc
Minimum position
Unoccupiedc
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).
21
63-2576
W7212, W7213, W7214 LOGIC MODULES
SETTINGS AND ADJUSTMENTS
Potentiometers with screwdriver adjustment slots, located on
device face, provide adjustments for several parameters
(see Fig. 33 for locations on device):
— DCV setpoint.
— Minimum damper position.
— Maximum damper position.
— Enthalpy changeover.
— Exhaust setpoint.
Demand Control Ventilation Setpoint
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.
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.
EXHAUST
FAN SETPOINT
LED LIGHTS
WHEN EXHAUST
CONTACT IS MADE
MINIMUM DAMPER
POSITION SETTING
N1
N
2V
EXH
Set
10V
EXH
P1
P
LED LIGHTS WHEN
DEMAND CONTROL
VENTILAION INPUT
IS ABOVE SETPOINT
Open
T
2V
DCV
Max
10V
AQ1
NOTE: Ensure that the sensed air is well mixed.
DCV
AQ
SO+
2V
DEMAND CONTROL
VENTILAION SETPOINT
4.
5.
Min
Pos
T1
MAXIMUM DAMPER
DEMAND CONTROL
VENTILATION SETPOINT
DCV
Set
10V
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
SO
SR+
SR
LED LIGHTS WHEN
OUTDOOR AIR IS
SUITABLE FOR
FREE COOLING
ENTHALPY
CHANGEOVER SETPOINT
Free
Cool
B
C
A
D
M20604
Fig. 33. Potentiometer and LED locations.
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:
—
—
63-2576
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. 32 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.
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.
22
IMPORTANT
This procedure requires use of a quality thermometer
capable of reading to 0.5°F [0.25°C].
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.
W7212, W7213, W7214 LOGIC MODULES
Enthalpy Changeover
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.
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. 34 for the corresponding
control point. The factory-installed 620-ohm jumper must be in
place across terminals SR and SR+.
Exhaust Setpoint
Differential Enthalpy Changeover Setting
NOTE: EF and EF1 are dry contacts only. An external line
voltage contactor is required to operate the exhaust
fan.
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.
23
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.
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.
63-2576
W7212, W7213, W7214 LOGIC MODULES
46
85
90
95 100 105 110
(29) (32) (35) (38) (41) (43)
42
)
(%
R
TY
IDI
AI
38
RY
UM
EH
TIV
LA
32
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
16
18
55
(13) B
14
50
(10)
12
45
(7)
30
A
B
C
D
44
CONTROL CONTROL POINT
CURVE
APPROX. °F (°C)
AT 50% RH
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
70
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 W6210D, W7210D, W7212, W7213, W7214.
M11160B
Fig. 34. Partial psychrometric chart with single C7400 Solid State Enthalpy Sensor and
W7212 Solid State Economizer Logic Module performance Curves.
63-2576
24
W7212, W7213, W7214 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. 35. W7212 used with M7215 Damper Motor.
25
63-2576
W7212, W7213, W7214 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 10 and Fig. 36
for checkout.
W7212
N1
N
CAUTION
2V
EXH
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
+
2V
DCV
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. 36. Meter location for checkout and troubleshooting.
Table 10. Checkout for W7212 Economizers Connected to Honeywell Actuator.
Step
Checkout Procedure
1.
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.
3.
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.
63-2576
26
W7212, W7213, W7214 LOGIC MODULES
Table 10. Checkout for W7212 Economizers Connected to Honeywell Actuator. (Continued)
Step
4.
5.
Checkout Procedure
Proper Response
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.
27
63-2576
W7212, W7213, W7214 LOGIC MODULES
APPENDIX
IMPORTANT
This page is only for C7232 models with date code prior to 0309.
Pre 0309 Date Code Jumper Settings
Input Signal
The C7232 Sensors have an adjustable range. These ranges
are determined by the SW2 and OUT1 jumper settings (see
Table 11).
NOTE: When choosing analog output, be sure to set the
SW1 jumper to the On position.
Table 11. CO2 Range Jumper Settings for models
with date code prior to 0309.
Jumper SW1
Relay Switchingb
—c
X
c
—
X
a
b
c
d
Off
0 to 1000
0 to 2000
500 to 1500
500 to 2000
d
800
X
2-10Vdc
0-20 mA
4-20 mA
NOTES:
—
—
On duct models with date code prior to 0309, remove
the screw holding the board in place to view jumper
settings on reverse. (See Fig. 37.)
The CO2 settings and the output signal settings are
independent of each other. 0-100% and 20-100% are
simply markings for the OUT jumper settings on the
sensor (to differentiate between the two voltage and the
two current ranges) and do not refer to or alter the ppm
range chosen.
1200d
1000d
Setting when shipped from the factory.
OUT1 jumper setting does not affect the Relay Switching.
The analog output will not work properly when SW1 is Off.
When the level reaches this value, the contacts close; when the
level drops 100 ppm below this value, the contacts open.
SW2SW1 OUT
Output Signal
AN2
AN1
OUT1
Select
AN1
AN2
AN2
a
X
0-10Vdc
Current
Voltage
Current
AN1
Ona
20-100%
Voltage
Jumper SW2
Off
0-100%
Voltage
Current
OUT1b
Ona
Setting
OUT
AN1 and AN2 (set
both the same)
OFF
ON
OFF
ON
0 – 100%
20 – 100%
Jumper
Table 12. Output Signal Jumper Settings for models
with date code prior to 0309.
The output signal can be adjusted for 0/2-10Vdc or 0/4-20mA
(see Table 12).
M20494
Fig. 37. C7232 default jumper settings for models
with date code prior to 0309.
Automation and Control Solutions
Honeywell International
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
Control Products
Honeywell Building
17 Changi Business Park Central 1
Singapore 486073
63-2576
B.B. 6-04
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario
M1V 4Z9
Honeywell Europe S.A. Honeywell Latin American
Region
3 Avenue du Bourget
1140 Brussels
Belgium
480 Sawgrass Corporate Parkway
Suite 200
Sunrise FL 33325
www.honeywell.com
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