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W7212, W7213, W7214 ECONOMIZER LOGIC MODULES

63-2596—09

Fig. 3. Mounting the module on sheet metal.

C7400 Enthalpy Sensor and
C7660 Dry Bulb Temperature Sensor

W7212, W7213, W7214 Logic Modules accept signals from

either the C7400 Enthalpy Sensor or the C7660 Dry Bulb

Temperature Sensor. The 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.

For differential dry bulb operation use two C7650 sen-

sors. Note for referential dry bulb use only the C7660

dry bulb sensor for the most energy savings.

OUTDOOR AIR SENSING

Mount sensor in any orientation exposing it to freely

circulating air while protecting it from rain, snow, and

direct sunlight.

Connect it to the SO and SO+ terminals of the device.

RETURN AIR SENSING

Ensure differential enthalpy control has a second

enthalpy sensor in the return air duct.

Connect this sensor to the SR and SR+ terminals.

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.

<1 Vdc = no CO2 sensor or failed sensor; 1 Vdc = CO2 sen-

sor working but below CO2 set point and CO2 sensor work-

ing and above set point.

Economizer should be powered by fan, if fan is off econo-

mizer will spring return damper closed, if fan is on and no

occupancy damper will drive to DCV MAX position.

M20601

Table 1. W7212 Terminal Power and Action.

Occupied

Terminal N has

24 VAC power

Input on

AQ-AQ1

terminals

Action with 24 VAC

power applied to W7212

(TR-TR1)

Yes

1 Vdc

Drives to MIN POS

1 Vdc

No movement of motor

Yes

<1 Vdc

Drives to MIN POS or

DCV MAX (highest)

<1 Vdc

Drives to DCV MAX

Yes

>DCV set pt

Drives to up to MIN POS

or DCV MAX (highest)

>DCV set pt

Drives to DCV MAX

Содержание W7212

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

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

Страница 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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