Installation manual

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PREMIER INSTALLATION MANUAL
Description of Unit Operation
Note: Fan speed operation below applies only to units equiped with ECM blower motors.
Heating Operation
Heat, 1st Stage (Y1)
The fan motor is started on low speed immediately, the loop pump is energized 5 seconds after the “Y1” input is re-
ceived, and the compressor is energized on low capacity 10 seconds after the “Y1” input. The fan is switched to medium
speed 15 seconds after “Y1” input. The hot water pump is cycled 30 seconds after the “Y1” input.
Heat, 2nd Stage (Y1, Y2)
The hot water pump is de-energized, which directs all heat to satisfying the thermostat, and the fan changes to high
speed 15 seconds after the “Y2”input.
Heat, 3rd Stage (Y1, Y2, W)
The fi rst stage of resistance heat is energized 10 seconds after “W” input, and with continuous 3rd stage demand, the
additional stages of resistance heat engage sequentially every 5 minutes.
Emergency Heat
The fan is started on high speed, and the fi rst stage of resistance heat is energized 10 seconds after the “W” input.
Continuing demand will engage the additional stages of resistance heat sequentially every 2 minutes.
Cooling Operation
In all cooling operations, the reversing valve directly tracks the “O” input. Thus, anytime the “O” input is present, the
reversing valve will be energized.
Cool, 1st Stage (Y1,O)
The fan motor is started on low speed immediately, the loop pump is energized 5 seconds after the “Y1” input is
received, and the compressor is energized 10 seconds after the “Y1” input. In the ECM2 version, the fan is switched to me-
dium speed 15 seconds after “Y1” input (remains in low speed if in dehumidifi cation mode). The hot water pump is cycled
30 seconds after the “Y1” input.
Cool, 2nd Stage (Y1, Y2, O)
The fan changes to high speed (85% of high speed if in dehumidifi cation mode) 15 seconds after the “Y2” input.
Fan (G only)
The fan starts on low speed. Regardless of fan input “G” from thermostat, the fan will remain on low speed for 30
seconds at the end of each heating, cooling or emergency heat cycle.
Lockout Conditions
During lockout mode, the appropriate unit and thermostat lockout LEDs will illuminate. The compressor, loop pump, hot
water pump, and accessory outputs are de-energized. Unless the lockout is caused by an ECM2 low RPM fault, the fan will
continue to run on low speed. If the thermostat calls for heating, emergency heat operation will occur.
Lockout modes of any kind can be reset at the thermostat after a 5-second waitinng perioud, which restores normal
operation but keeeps the unit lockout LED illuminated. Interruption of power to the unit will reset a lockout without a waiting
period and clear all lockout LEDs.
High Pressure
This lockout mode occurs when the normally closed safety switch is opened momentarily.
Low Pressure
This lockout mode occurs when the normally closed low pressure switch is opened for 30 continuous seconds.
Freeze Protection (Water Flow)
This lockout mode occurs when the freeze thermistor temperature is at or below the selected freeze protection point
(well 30°F or loop 15°F) for 30 continuous seconds.
Condensate Overfl ow
This lockout mode occurs when the condensate overfl ow level has been reached for 30 continuous seconds.
Fan RPM
When equipped with an ECM2 fan motor, the Premier control board monitors fan RPM to sense operation. This
lockout mode occurs if the fan RPM falls below the low RPM limit (100 RPM) for 30 continuous seconds.