Specifications

9
HEAT PUMP OPERATION
(Perform BASIC ECONOMIZER OPERATION check first)
START
Perform STEP 2
Perform STEP 3
Reapply Power to the Unit
Put thermostat fan setting to "CONTINUOUS FAN"
Turn down thermostat setting so that a call for cooling is present.
Set enthalpy potentiometer on economizer controller to A (fully CCW).
The "Free Cooling" LED turns on & the EXH LED turns on.
If only one stage of cooling is called by the thermostat, then that stage will turn off.
If two stages are called by the thermostat, then only the second stage will turn off.
The power exhaust (optional) contacts will close after 60 +/- 30 seconds.
The outside air damper opens approximately 50% (this position is determined by
the actual resistance of the 5.6k ohm resistor placed across terminals T and T1).
Reset the thermostat setting so that a call for heating is present.
The "Free Cooling" LED turns off & the EXH LED turns off.
If only one stage of heating is called by the thermostat, then that stage will turn on.
If two stages are called by the thermostat, then both stages will turn on.
The power exhaust (optional) contacts will open The outside air damper fully
closes.
Perform Basic Economizer Operation
check first. Recheck STEP 2 and
STEP 3
Turn Min Pos potentiometer fully CW.
The outside air damper drives fully open.
The EXH LED turns on.
The power exhaust (optional) contacts will close after
approximately 60 +/- 30 seconds.
Check for 24 VAC at B terminal.
Check for B signal at thermostat.
Check Unit wire harness.
Check Economizer Wire harness.
Heat Pump Operation is Correct.
Remove resistors, reconnect wires, and set up
potentiometers per jobsite requirements.
Replace controller.
YES
YES
YES
NO
NO
NO
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