Carrier GR-45 Operation And Service

Contents

Carrier GR-45 Operation And Service Manual pdf 10 page image

1-2T--2951.2 GENERAL DESCRIPTION1.2.1 Apex UnitThe apex unit (see Figure 1-2) includes the condensingsection, evaporator section, Micromax electronics, andthe Fresh Air System. All components are accessible bylifting the top cover. Descriptions of the systems areprovided in the following sub paragraphs.12345678101191. Top Cover2. Gas Spring (2)3. Condenser Section (See Figure 1-3)4. Evaporator Section (See Figure 1-4)5. Base6. Fresh Air System7. Gas Spring Support (2)8. Lock (2)9. Serial Plate10. Hinge11. Condenser Fan Grille (4-GR45,6-GR60)12. Front Drain (2)*13. Intermediate Drain (2)*14. Evaporator Rear Drain (2)*15. Condenser Rear Drain (2)** Not ShownFigure 1-2. Apex Unit Components(GR-60 Shown)1.2.2 Condensing SectionThe condensing section (Figure 1-3) includes thecondenser coils, fan and motor assemblies, filter-drier,receiver, liquid line solenoid valve, service valves, andan ambient temperature sensor.The condenser coils provide heat transfer surface forcondensing refrigerant gas at a high temperature andpressure into a liquid at high temperature and pressure.The condenser fans circulate ambient air across theoutside of the condenser tubes at a temperature lowerthan refrigerant circulating inside the tubes; this resultsin condensation of the refrigerant into a liquid. Thefilter-drier removes moisture and debris from the liquidrefrigerant before it enters the thermostatic expansionvalve in the evaporator assembly.