Secondary Heat Exchanger - Data Aire gForce Ultra User Manual

microprocessor control module. Slide the Cool 2 switch to the ON position, observe the
compressor operation for a short period of time then slide the switch back to the OFF
position. An out of phase constant speed scroll compressor will draw relatively low
amps and both suction and discharge pressures will remain nearly equal. If necessary,
reverse any two of the three input line voltage wires at the line voltage field connection
point to change the compressor rotation.
The gForce Ultra unit has a variable capacity compressor and an out of phase
compressor will not turn ON and the VFD will show an error message. On the Manual
Override Module located next to the microprocessor control module, slide the Cool 1
switch to the ON position, observe the VFD for an error message then slide the switch
back to the OFF position. If an error message is observed, reverse any two of the three
input line voltage wires at the line voltage field connection point to change the
compressor rotation.
Although constant speed scroll compressors are phase dependent, units shipped from
the factory are run tested, ensuring the compressor rotation is consistent with
evaporator fan motor.
checking proper phase.

5.2.2 Secondary Heat Exchanger

The secondary heat exchanger is ordered as three phase and the individual fan motors
are three phase and will only run in one direction.
momentary jumper across low voltage terminals # 39 and # 40 which will energize the
control circuit.
NOTE:
water/glycol solution.
Fans may not run because the head pressure is below the required cut-in pressure on
air cooled condensers.
pressure is over 320 PSI (2206 kPa).
See separate User Manual for air cooled condensers or fluid coolers for the detail on the
secondary heat exchanger.
10-2014
However, a field change-out of a compressor may require
Disconnect pumps on glycol systems unless already filled with
On an R-410A system, the fan will not run until the head
Check operation by placing a
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