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1.7. Using a Manometer in Trouble-Shooting
The pressure in a refrigerating system is directly dependent on
the temperature. For this reason, the manometer can indicate
both temperature in degrees Celsius and pressure in bar.
By mounting a manometer on the suction side of the compres-
sor ~process ppe~. the temperature in the evaporator at which
the refrigerant evaporates can be read. This temperature is
normally from -15 C to -25 C in a refrigerator and from -3CC
to -35 C in a freezer. These temperatures apply when the unit
is set at its coldest position.
The pressure equalizing time is the time taken to reach an
denhcal liquid pressure in the condenser and the evaporator
after stop of the compressor. This is usually 8 minutes in
treezers and slightly less in refrigerators.
13.