Edwards TCU 40/80 - Page 14

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Table 3 - Refrigeration and coolant components
Item
I
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Component name
Reservoir
Level switch
Compressor
Crankcase regulator
Suction service valve
Discharge service valve
Temperature switch
Pressure switch
Condenser
Filter dryer
Safety cooling valve
Motor
Pump
Bypass valve
Hot gas bypass valve
Subcooler
Solenoid valve SV2
Solenoid valve SV1
Sight glass
TEV (Thermostatic
expansion valve)
Heater
Flow switch
Heat exchanger
Pressure relief valve
Function
A holding tank for the Fluorinert coolant.
Monitors the coolant level in the reservoir.
Compresses the refrigerant fluid.
Protects the compressor against pressure overload.
Allows isolation at the compressor.
Allows isolation at the compressor.
High limit switch for reservoir heater.
Limits maximum allowable discharge pressure.
Transfers heat from the compressed refrigerant to the facility water.
Removes contaminants and moisture from the refrigerant.
Limits the discharge temperature.
Drives the coolant pump.
Circulates the Fluorinert coolant.
Regulates coolant flow.
Regulates cooling capacity.
Further cools the refrigerant that is returning to the compressor.
Allows refrigerant to pass through the hot gas bypass valve, then to
the compressor suction line when energized.
Allows refrigerant to pass to the TEV when energized.
Allows visual inspection of the refrigerant charge and presence of
moisture in the system.
Allows the refrigerant to expand from a liquid to a gas.
Raises the temperature of the coolant when the process requires
heating.
Monitors the flow rate.
Extracts heat from the coolant and transfers it to the refrigerant.
Discharges refrigerant from the system to the atmosphere in the
event of severe over-pressure condition.
TCU 40/80 Temperature Control Unit