Installation, Operation and Maintenance Manual
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12
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Dispose of all packaging materials in accordance with regionally applicable regulations.
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Confirm there are no obstructions within the clearance area.
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Check all unit electrical and pressure ratings to be within the ratings on the serial name plate.
Installation of Remote Heat Exchanger
Air-cooled condensers and fluid coolers have individual Installation, Operation and Maintenance manuals which
should be referred to for more complete details.
Voltage Phase Check
2.11.1
Evaporator Power Phasing
The correct voltage phasing for the scroll compressors and forward-curved centrifugal blowers must be checked.
Both components are phase dependent and although our units are factory run tested, it is important to make sure
the rotation of these motors are correct in the field. A quick and easy way to check the scroll compressor rotation
on the evaporator section is to momentarily energize the COOL 1 manual switches on the Manual Override Switch
Board located next to the dap4 controller or use compressor Manual control Mode -in menu I if using the Mini-dap4
controller. Observe the compressor operation for a short period of time then slide the switch back to the OFF
position. An out of phase compressor will draw relatively low amps and both suction and discharge pressures will
remain nearly equal. Reverse any two of the three-line voltage wires at the line voltage field connection point to
change the compressor rotation which also changes the rotation of any other phase sensitive components within
the evaporator.
NOTICE
The floor mounted gPod units include backward curve plenum fans with
electronically commutated (EC) motor as a standard feature. The EC motors are
phase independent therefore the plenum fan rotation will always be in the
correct direction.
NOTICE
Units shipped from the factory are run tested ensuring compressor
rotation is consistent with the evaporator fan motor. However, a field change-
out of the compressor may require checking proper phase.
2.11.2
Remote Heat Exchanger
The gForce remote heat exchanger (GHRC) (air cooled or dry coolers) are three phase and the individual axial fans
with electronically commutated (EC) motors are three phase and will only run in one direction. Check operation by
