STARTUP & ADJUSTMENTS
The following check list should be observed prior to starting the unit.
√Is the unit level? Unit should be level or slightly slanted toward the drain for proper condensate drainage.
√Is the unit installed with the proper clearances as listed in Figure 3 (page 6)?
√Is the wiring correct according to the wiring diagram and electrical codes?
√Are all the wiring connections tight? Check the condenser fan to make sure it turns freely.
√Is the overcurrent protection properly sized?
√Is the thermostat wired correctly? Is it installed in a proper location?
Start-Up Procedure
The control circuit consists of an
1.Set the system mode to OFF and the temperature mode to its highest setting.
2.Turn power on at the disconnect switch.
3.Set the system mode to ON or COOL.
4.Set the temperature mode below room temperature. Verify that the indoor blower, outdoor fan, and compressor energize and the cooling function starts.
5.Verify the discharge air grilles are adjusted and the system air is balanced.
6.Verify the duct work has no air leaks.
7.Verify the condensate drain is installed correctly and functions properly.
8.Set the temperature mode above room temperature. The unit should stop.
9.Instruct the homeowner on unit and thermostat operation and fi lter servicing.
Air Circulation
Leave the thermostat system mode on OFF, and set the fan mode to ON. Blower should run continuously. Check the air delivery at the supply registers and adjust register openings for balanced air distribution. Examine ductwork for leaks or obstruction if insufficient air is detected.
Set the thermostat fan mode to AUTO.The blower should stop running.
System Heating
Set the thermostat system mode to HEAT and the fan mode to AUTO. Change the thermostat temperature selector above the existing room temperature and check for the discharge of warm air at the supply registers.
System Cooling
Set the thermostat’s system mode to COOL and the fan mode to AUTO. Change the thermostat
temperature selector below the existing room temperature.Allow the cooling system to operate for several minutes and check for the discharge of cool air at the supply registers.
Short Cycle Protection
The control circuit is equipped with a
Emergency Heat
1.Set the thermostat’s system mode to EM HT and the fan mode to either AUTO (intermittent air) or to ON (continuous air).
2.Set the ther mostat’s temperature selector above the existing room temperature and check the following:
•The thermostat auxiliary heat light (RED) is on.
•The AC compressor and the fan should not run; low voltage circuit remains energized.
•Theblowerrunsaccordingtothethermostat’s fan mode setting.
Forced Defrost Mode (Field Test)
•When the TEST terminals are shorted with the Y input active and pressure switches closed, the ACSD will be eliminated and the compressor contactor output energizes within 2 seconds. When the TEST terminals are shorted for more than 9 seconds with the Y input active, the control will be placed into a forced defrost mode.
NOTE: The coil temperature sensor does not need to be cold when the unit is forced into defrost.
•After the TEST input is removed, the defrost mode will terminate in 13.7 minutes or less or when the coil temperature is above the terminate set point or when the thermostat Y input is removed, whichever occurs fi rst.
Anti Short Cycle Timer Test
The 5 minute time delay feature can be bypassed by shorting the TEST pins together.
Heating Mode
When the TEST pins are shorted together for more than 1 second, the control will switch between defrost mode and heating mode as described in the Forced Defrost Mode procedure section.
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