Trane CHHP N2 Semi-Hermetic Screw Compressor
GP2 Type Semi-Hermetic Screw Compressors Trane CHHP N2 details;
- Trane GP2 Type CHHP N2 Model Semi-Hermetic Screw Compressors
- Starting: Star/Delta
- Cooling Capacity: 360 Kw
- Motor Voltage: 460-60-3 or 400-50-3
- Capacity Control: Variable unloading capability
- Refrigerant: R134a – R513A – R1234ze
- Design: Semi-Hermetic, Two Rotors
- Speed: 3600 rpm (60 Hz) – 3000 rpm (50 Hz)
- Heater: 150W Heater Element
The GP2 Type CHHP compressor is a “screw” or helical rotor design with two rotors, one directly driven by the motor called the male and the other driven by the lobes of the male called the female.
The Trane GP2 CHHP compressors have a female step load solenoid valve and male load/unload solenoid valves that utilizes for capacity control. And the name of the step load solenoid is “female” Solenoid Valve. Because it acts on the female rotor side of the compressor, and its function is to “pilot” a larger valve inside the compressor that opens to bypass compressed vapor back to the suction of the compressor. This bypass action causes a “step” difference in the capacity of the compressor.
On the Male rotor side of the compressor is the male port unloader piston, which can move laterally along the male rotor. Small bypass ports in the rotor housing are covered and uncovered by the unloader piston as it moves. The position of the piston, controls by two direct acting solenoid valves called the male load and male unload solenoid valves. These valves add or vent pressure to the cylinder of the movable piston to position and “modulate” the amount of compressed vapor that bypasses back to suction.