Carrier 60 Service Manual download pdf (Page 11)

1-3

T--295

The receiver collects and stores liquid refrigerant. The

receiver is fitted with upper and lower liquid level sight

glasses to enable determining refrigerant liquid level.

The receiver is also fitted with a fusible plug which

protects the system from unsafe high pressure

conditions. The liquid line solenoid valve closes when

system is shut down to prevent flooding of coils with

liquid refrigerant. Theservicevalves enable i solation of

the filter-drier for service. The ambient temperature

sensor measures ambient temperature and sends an

electrical signal to the controller.

The discharge check valve is a spring loaded, normally

closedvalve thatopens withthe flowof refrigerant from

the compressor. When the compressor clutch is

disengaged, the discharge check valve will close,

preventing the flow of high pressure liquid from the

condenser back into the compressor.

12 3

1. Condenser Coil (2)

2. Receiver

3. Protection Plate

4. Service Valve

5. Discharge Line

6. Precharge Valve

7. Liquid Line Solenoid Valve

8. Filter Drier Upper Support

9. Filter Drier

10. Filter Drier Lower Support

11 Condenser Fan and Motor Assembly

(4-GR45, 6-GR60)

12. Condenser Coil Fastener (4)

13. Condenser Motor Support

(4-GR45, 6-GR60)

Figure 1-3. Condensing Section Components

(GR-60 Shown)

1.2.3 Evaporator Section

The evaporator section (Figure 1-4) includes the

evaporator coils, six fan and motor assemblies,

evaporator/heater coil assemblies, a thermostatic

expansion valve and condensate drain connections.

The evaporator coils provide heat transfer surface for

transferring heat from air circulating over the outside

the coil to refrigerant circulating inside the tubes; thus

providing cooling. The heating coils provide heat

transfer surface for transferring heat from engine

coolant water circulating inside the tubes to air

circulating over the outside surface of the tubes, thus

providing heating. The fans circulate the air over the

coils. The air filters remove dirt particles from the air

before it passes over the coils. The thermostatic

expansion valve meters flow of refrigerant entering the

evaporator coils. The heat valve controls the flow of

engine coolant water to the heating coils upon receipt of

a signal from the controller. The condensate drain

connections provide a means for connecting t ubing for

disposing of condensate collected on the evaporator

coils during cooling operation.

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Carrier 60 Service Manual Page 11

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