Chapter 19 Installation and Troubleshooting of Domestic Refrigerators and Freezers
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Suction line
High-pressure vapor Low-pressure vapor
High-pressure liquid Low-pressure liquid
Piercing
valve
Evaporator
Filter-drier
Capillary tube
Compound
gauge
Condenser
High-pressure
gauge
Compressor
Liquid line
Piercing valve
Goodheart-Willcox Publisher
Figure 19-16. The service lines of a manifold gauge set with a high-pressure gauge and a compound gauge are connected to a
hermetic system. Piercing valves are used to attach the service lines to the hermetic system.
Typical Refrigerator Statistics
Condition
70°F Ambient
Temperature
90°F Ambient
Temperature
100°F Ambient
Temperature
Cabinet Temperature 38°F 40°F 47°F
% Operating Time 38 62 100
Cycles per Hour 3 2 None
kWh/24 hrs 3.8 6.0 9.9
Temperature Control Position 4 4 4
Evaporator Air Temperature 1.5°F –1°F 0°F
Suction Pressure (Min–Max) 2″ Hg–13 psig 0–13 psig 13–20 psig
Watts (Complete System) 390±20 395±20 395±20
Goodheart-Willcox Publisher
Figure 19-17. This chart shows operating characteristics of 18 ft3 combination refrigerator-freezer that has 1/3 hp two-pole motor
compressor.