Installation & Commissioning Manual:
Neos 100S, 20X, 30S, 35X, 40X, 50X
62-11165 Rev D
®
26
Evaporator CPR Adjustment
The Compressor Regulation Valve (CPR) is designed to regulate the flow of refrigerant
returning to the compressor from the evaporator and ensures the correct capacity of the unit.
The CPR also reduces compressor start-up and operation load. It is critical it is set correctly.
CPR adjustment MUST be done under the following conditions:
• Road operation at 2,400 compressor RPM
• Heat or Defrost mode
Connect manifold gauges to the CPR fitting port.
Start the unit in Heating or Defrost mode. Check that
the road compressor speed is 2,400 RPM
Remove the cap on the CPR valve.
Adjust the CPR with an 8mm Allen (hex head) wrench
to get correct gauge pressure (see next page).
• To raise the suction pressure, turn the set screw
clockwise
• To lower the suction pressure, turn the set
screw counter-clockwise.
To Next Page
Loading...