Honeywell W7212 Product Data Download Page 5

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W7212, W7213, W7214 ECONOMIZER LOGIC MODULES

63-2596—09

Mount the CO2 sensor according to the manufacturer

specifications. If not available, use the following guidelines:

Mount sensor in an area with unobstructed air

circulation.

Connect it to the AQ

and AQ1 terminals of the W7212

(see Wiring section for details).

Adjust the DCV potentiometer setpoint to correspond to

DCV voltage output at the threshold.

Fig. 4. Representative locations of connected economizer system devices.

Wiring

CAUTION

Electrical Shock or Equipment Damage Hazard.

Can shock individuals or short equipment

circuitry.

Disconnect power supply before installation.

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.

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).

IMPORTANT

During heating applications with defrost, make sure to

break the connection to the economizer using an iso-

lation 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.

DISCHARGE
AIR SENSOR

C7046A

DIRECT
EXPANSION
COIL

ENTHALPY
SENSOR

C7232

ENTHALPY
SENSOR

RETURN AIR

OUTDOOR
AIR

C7150B

MIXED AIR

SENSOR

COMMERCIAL
THERMOSTAT

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.

USE EITHER MIXED AIR SENSOR OR DISCHARGE
AIR SENSOR, NOT BOTH.

M19547C

HONEYWELL

ACTUATOR

W7212,

W7213,

W7214

DCV
SENSOR

EXHAUST AIR

DISCHARGE
AIR

INDOOR
FAN

EXHAUST
FAN

C7400

Summary of Contents for W7212

Page 1: ...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 LED indicates when module is in DCV mode LED indicates w...

Page 2: ...ed 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 occu pancy CO2 input and damper positions for adjustments of potentiometers for MIN POS and DCV...

Page 3: ...ienced service technician 4 After installation is complete check out product operation as provided in these instructions 5 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 potenti ometer must be closer to the fully CCW position that the DCV MAX potentiometer for the damper to modulate beteen the two setti...

Page 4: ...roper 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 s...

Page 5: ... 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 During heating applications with defrost make sure to break the connection to the economizer ...

Page 6: ...nly to dry bulb temperature use only in dry arid climates and only in single dry bulb changeover Do not use the C7660 in differential dry bulb applications The logic module functions as a true first stage of cooling providing maximum energy economy during the cooling cycle It automatically locks out free cooling during heating holding the outdoor air damper at the minimum position setting or if us...

Page 7: ...position High Free Cooling LED Off Low On On On On Minimum position Closed On Off On Off Off Off Off Off Low Free Cooling LED On High On On On Off Modulatingc between min position and full open Modulatingc between closed and full open On Off Off Off Off Off Off Off Minimum position Closed Above set DCV LED On High Free Cooling LED Off Low On On On On Modulatingd between min position and DCV maximu...

Page 8: ...m position overrides the maximum position with the series 2 units NOTES 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 c...

Page 9: ...lected curve will allow the dampers to open for free cooling temperature and humidity conditions to the right of the curve 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 Differential Enthalpy Changeover Setting Differential enthalpy control uses two C7400 Enthalpy Sensors connected to one logic module The logic modu...

Page 10: ...ROL POINT APPROX F C AT 50 RH 73 23 70 21 67 19 63 17 1 2 1 4 1 6 1 8 2 0 2 2 2 4 2 6 2 8 3 0 3 2 3 4 3 6 3 8 4 0 4 2 4 4 4 6 9 0 1 0 0 8 0 7 0 6 0 5 0 4 0 3 0 20 10 E N T H A L P Y B T U P E R P O U N D D R Y A I R 85 29 90 32 95 35 100 38 105 41 110 43 35 2 35 2 40 4 40 4 105 41 110 43 45 7 45 7 50 10 50 10 55 13 55 13 60 16 60 16 65 18 65 18 70 21 70 21 75 24 75 24 80 27 80 27 85 29 90 32 95 35...

Page 11: ... 3 4 3 6 3 8 4 0 4 2 4 4 4 6 9 0 1 0 0 8 0 7 0 6 0 5 0 4 0 3 0 20 10 E N T H A L P Y B T U P E R P O U N D D R Y A I R 85 29 90 32 95 35 100 38 105 41 110 43 35 2 35 2 40 4 40 4 105 41 110 43 45 7 45 7 50 10 50 10 55 13 55 13 60 16 60 16 65 18 65 18 70 21 70 21 75 24 75 24 80 27 80 27 85 29 90 32 95 35 100 38 APPROXIMATE DRY BULB TEMPERATURE F C A A B B C C D D M23879A R E L A T I V E H U M I D I ...

Page 12: ...EMS OR SINGLE STAGE COOLING THERMOSTATS T7300 TERMINALS A1 AND A2 ARE CONNECTED WHEN COMMERCIAL THERMOSTAT IS IN THE OCCUPIED MODE EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE M20716F S 1 2 3 2 4 5 5 C7400 OUTDOOR AIR ENTHALPY SENSOR L1 HOT L2 FAN HEAT 1 HEAT 2 COOL 1 HVAC EQUIPMENT TERMINAL STRIP T7300 Q7300 THERMOSTAT 1 C G W1 A2 A1 Y1 Y2 R W2 RC RH G X W1 Y1 Y2 W2 A1 A2 COOL 2 N1 P1 T1 SR SO...

Page 13: ...ERED BY THE SAME TRANSFORMER AS TERMINAL AUX IF NOT USE AN ISOLATION RELAY TO POWER N 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 EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE M13657B S 1 2 3 2 4 5 C7400 OUTDOOR AIR ENTHALPY SENSOR L1 HOT L2 FAN HEAT 1 HEAT 2 ...

Page 14: ...A BE SURE THE ECONOMIZER IS POWERED BY THE SAME TRANSFORMER AS TERMINAL A IF NOT USE AN ISOLATION RELAY TO POWER N 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 EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE M13658B S 1 2 3 2 4 5 C7400 OUTDOOR AIR ENTHALPY SENSOR...

Page 15: ...GE COOLING THERMOSTATS EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE SEE WIRING DIAGRAMS FOR T7350 AND TB7220 TB8220 TIME CLOCK IS AN OPTION TO USING OCCUPIED CONTACTS ON THE COMMERCIAL THERMOSTAT M13659C S 1 2 3 2 4 5 4 C7400 OUTDOOR AIR ENTHALPY SENSOR UNOCCUPIED ST6008 TIMER L1 HOT L2 FDR FDR FAN HEAT 1 HEAT 2 COOL 1 HVAC EQUIPMENT TERMINAL STRIP COMMERCIAL THERMOSTAT 1 C G W1 Y1 R W2 RC RH G...

Page 16: ...RMINAL FOR TB7220 OR TB8220 USE A TERMINAL THE TERMINALS ARE CONNECTED WHEN THERMOSTAT IS IN THE OCCUPIED MODE EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE SEE WIRING DIAGRAMS FIGS 9 AND 10 FOR T7350 AND TB7220 TB8220 TIME CLOCK IS AN OPTION TO USING OCCUPIED CONTACTS ON THE COMMERCIAL THERMOSTAT UNOCCUPIED ST6008 TIMER L1 HOT L2 FDR FDR FAN HEAT 1 HEAT 2 COOL 1 HVAC EQUIPMENT TERMINAL STRIP T7...

Page 17: ...ED TO SR AND SR FOR DIFFERENTIAL ENTHALPY EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE SEE WIRING DIAGRAMS FIGS 9 AND 10 FOR T7350 AND TB7220 TB8220 TIME CLOCK IS AN OPTION TO USING OCCUPIED CONTACTS ON THE COMMERCIAL THERMOSTAT M13661B 1 2 3 4 5 ST6008 TIMER 1 2 L1 HOT L2 L1 HOT L2 L1 HOT L2 FDR FDR FAN HEAT 1 HEAT 2 COOL 1 COOL 2 HVAC EQUIPMENT TERMINAL STRIP COMMERCIAL THERMOSTAT 1 C G W1 Y1...

Page 18: ...S A2 AND A3 ARE CONNECTED WHEN THERMOSTAT IS IN THE UNOCCUPIED MODE SEE T7350 AND TB7220 TB8220 WIRING W7213 B TERMINAL W7214 O TERMINAL M19618E 1 2 3 4 5 4 5 5 L1 HOT L2 FAN HEAT 1 HEAT 2 COOL 1 COOL 2 HVAC EQUIPMENT TERMINAL STRIP T7300 THERMOSTAT 1 C G W1 Y1 Y2 R W2 RC G X O O W1 RH Y1 Y2 A3 A2 W2 S C7400 OUTDOOR AIR ENTHALPY SENSOR O P1 T1 SR SO AQ EF1 5 EF 3 4 2 1 TR MINIMUM POSITION ADJUSTME...

Page 19: ...PRO IAQ 1 3 Y1 Y2 G RH C Y1 Y2 G R FAN COM HOT COOL 1 COOL 2 W7459 EIM HVAC EQUIP TERMINAL STRIP TR HOT TR1 COMMON RC R 2 3 1 C 1 2 3 0400 2 0174 E 0540 2 SELECT OPTION UNDER THERMOSTAT INSTALLER SETUP VISION PRO IAQ 1 3 Y1 Y2 G RH C Y1 Y2 G R FAN COM HOT COOL 1 COOL 2 W7212 EIM HVAC EQUIP TERMINAL STRIP TR HOT TR1 COMMON RC R 2 3 1 C 1 2 3 V1 T2 N1 N M29973 0400 2 0174 E 0540 2 SELECT OPTION UNDE...

Page 20: ... 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 p...

Page 21: ... 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 Remove power from N terminal adjust MIN POS towards CW Motor should not move Adjust DCV MAX towards CW Motor will move...

Page 22: ...o 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 Table 4 Checkout for W7212 W7213 W7214 Economizers Connected to Honeywell Actuator Continued Step Checkout Procedure Proper Response ...

Page 23: ...W7212 W7213 W7214 ECONOMIZER LOGIC MODULES 23 63 2596 09 ...

Page 24: ... 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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