Amprobe ACDC-620T Clamp-On-Multimeter User Manual
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Condenser Temperature
The condenser's entire mid-section should be at the refrigerant's condensing tem-
perature. The condensing temperature is related directly to the condenser's pres-
sure, which is produced by the compressor's head-pressure.
The condenser temperature varies with the system's load, but it is designed to
operate within certain limits. Load factors include the amount of heat absorbed by
the evaporator, air temperature surrounding the condenser (ambient air tempera-
ture), and airflow over the condenser.
Temperature Difference (TD)
The difference between ambient air and condensing temperature is a critical factor.
The greater the temperature difference between hot refrigerant and air, the faster
the heat will dissipate. If TD is too low, the refrigerant will not completely condense.
Condenser Superheat
The temperature of the hot gas discharged from the compressor is higher than the
condensing temperature. In the evaporator, the difference between the gas temper-
ature and condensing temperature is called superheat. However, since the pressure
here is far higher than at the evaporator, so is the temperature. Condenser super-
heat is usually measured as the difference between the first few condenser coils
and the midsection. Abnormal superheat ran indicate troubles such as condenser
overload, lack of refrigerant, and presence of non-condensable gas.