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W6215, W7215, W7460 ECONOMIZER LOGIC MODULES
27
63-2544—3
Table 6. Checkout For W6215, W7215, W7460 Economizer Connected To Honeywell Actuator.
Step
Checkout Procedure
Proper Response
1.
CHECKOUT PREPARATION
a. Disconnect power at TR and TR1.
Free Cool, Unit Control, Indoor Fan, and Exhaust Fan contacts are open.
b. Disconnect devices at P and P1, and Q and Q1.
-
c. Jumper P to P1, and Q to Q1.
d. Turn minimum position potentiometer fully CCW.
e. Turn maximum position potentiometer fully CW.
f. Place 6.8K ohm resistor across T and T1.
g. Jumper TR to 1.
h. If connected, remove C7400 Enthalpy Sensor from terminals S
O
and +.
Connect 1.2K ohm 4074EJM Checkout Resistor across terminals S
O
and +.
i. Set both ISI and Exhaust potentiometers fully CCW.
j. Put 620 ohm resistor across S
R
and +.
k. Set enthalpy potentiometer to D.
l. Apply power (24 Vac) to terminals TR and TR1.
2.
DIFFERENTIAL ENTHALPY
a. Execute step one, Checkout Preparation.
-
b. Place 620 ohm resistor across S
O
and +.
-
c. Place 1.2K ohm resistor across S
R
and +.
Free cool LED turns on.
d. Remove 620 ohm resistor from S
O
and +.
Free cool LED turns off.
3.
SINGLE ENTHALPY
a. Execute step one, Checkout Preparation.
-
b. Set enthalpy potentiometer to A (fully CCW).
Free cool LED turns on.
c. Set enthalpy potentiometer to D (fully CW).
Free cool LED turns off.
4.
ISI AND EXHAUST
a. Execute step one, Checkout Preparation.
-
b. Ensure terminals AQ and AQ1 are open.
LED for both ISI and Exhaust should be off.
Actuator drives fully closed.
c. Connect 9V battery positive to AQ and negative to AQ1.
LED for both ISI and Exhaust turn on.
Actuator drives 90 to 95 percent open.
d. Turn Exhaust potentiometer CW until Exhaust LED turns off.
Exhaust LED turns off with potentiometer at approximately 90 percent.
Actuator remains in position.
e. Turn ISI potentiometer CW.
ISI LED turns off with potentiometer at approximately 9V.
Actuator drives fully closed.
f. Turn ISI and Exhaust potentiometers CW until Exhaust LED turns on.
45 seconds after Exhaust LED turns on, Exhaust contacts close.
5.
FREEZE PROTECTION
a. Execute step one, Checkout Preparation.
-
b. Connect 9V battery positive to AQ and negative to AQ1.
LED for both ISI and Exhaust turn on.
Actuator drives 90 to 95 percent open.
c. Remove 6.8K ohm resistor from T and T1.
Exhaust LED turns off. Actuator drives fully closed.
d. Replace 6.8K ohm resistor across T and T1.
Exhaust LED turns on. Actuator drives 90 to 95 percent open.
6.
MINIMUM AND MAXIMUM POSITION
a. Execute step one, Checkout Preparation.
-
b. Connect 9V battery positive to AQ and negative to AQ1.
ISI LED turns on. Actuator drives 90 to 95 percent open.
c. Turn maximum position potentiometer to midpoint.
Actuator drives to between 20 and 80 percent open.
d. Turn maximum position potentiometer to fully CCW.
Actuator drives fully closed.
e. Turn minimum position potentiometer to midpoint.
Actuator drives to between 20 and 80 percent open.
f. Turn minimum position potentiometer fully CW.
Actuator drives fully open.