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Cool with Modulation Flow and Pressure Diagram
Flow and Pressure Diagram
CRR-40
Cool with Modulation (or Power Limit)
29. Evaporator Pressure Regulator (KVQ Valve)
Is a normally OPEN actuator valve. It CLOSES (or OPENS) accord-
ing to the strength and frequency of a pulsing voltage signal from the
controller. The voltage signal energizes a heating element in the
actuator power element. Increasing the temperature of the heating
element increases the pressure on the main valve actuator, forcing
the valve towards the closed position. Decreasing the temperature
of the heating element decreases the pressure on the main valve
actuator, drawing the valve towards the open position.
31. Liquid Injection Valve (LIV)
Is a normally CLOSED valve.
It OPENS when energized. When liquid injection is required, the
valve is pulsed open and closed on a 60 second duty cycle.
Liquid injection is controlled by the compressor discharge temperature
and the temperature control algorithm.
High pressure gas
High pressure liquid
Low pressure gas
Low pressure liquid
Condensing high pressure gas
Low pressure vaporizing liquid
Liquid refrigerant injection
Modulated pressure
Summary of Contents for CRR-40 119
Page 4: ......
Page 16: ...Safety Precautions 16...
Page 18: ...Service Guide 18...
Page 20: ...Model Features 20...
Page 32: ...Specifications 32...
Page 120: ...MP 3000a Controller 120...
Page 160: ...Wiring and Schematic Diagrams Index 160...
Page 161: ...161 MPC2000 Wiring Schematic...
Page 162: ...162 MPC2000 High Voltage Wiring Diagram...
Page 163: ...163 MPC2000 Low Voltage Wiring Diagram...
Page 164: ...164 MPC2000 WCC Wiring Schematic...