Answers

1To elevate the pressure, and, therefore, the temperature, of the refrigerant vapor high enough that it can reject heat to air, or some other fluid, at normally available temperatures.

2Reciprocating, scroll, helical-rotary (or screw), and centrifugal

3During the intake stroke, the piston travels away from the discharge valve and creates a vacuum effect, reducing the pressure within the cylinder to below suction pressure. Since the pressure within the cylinder is less than the pressure of the refrigerant at the suction side of the compressor, the suction valve is forced open and the refrigerant vapor is drawn into the cylinder.

4True

5Hermetic or semihermetic

6Decreases

7Cycling individual scroll compressors on and off

8Inlet vanes or variable-speed drive with inlet vanes

9Supply air temperature

10Chilled-water supply temperature

11Space temperature

12Sensing the suction temperature and hot gas bypass

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TRG-TRC004-EN

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Trane TRG-TRC004-EN manual Answers