System information

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Task Tech Initials
Measure Superheat: If superheat is high and bubbles are present, add more refrigerant until clear.
If superheat is low (around 4 - 6 degrees), and bubbles are present in the sight glass, check for liquid
refrigerant entering the compressor as evidenced by cool crankcase, below 100 - 110 degrees and low
discharge superheat. Adjust TXV setting in small increments to increase superheat and stop liquid to
compressor. Check this before adding more refrigerant. If temperature of air entering the condenser
is cold enough to cause the condenser fan to cycle, block about 60% of the coil to raise the head
pressure and allow time for stabilization Reduce blockage if condensing temp is above 115 degrees.
Retain blockage if necessary to maintain stability for performance tests listed below if air is cold, below
60 degrees entering the condenser With a clear sight glass, allow to run for a while until the cellar
cools o then measure and record data listed below.
Procedures followed:
Task Tech Initials
Evaporator panel has been reinstalled and secured with supplied screws.
Controller is displaying correct temperature.
The controller is not displaying an alarm.
Suction line is completely insulated, from solenoid valve to compressor.
Sight glass has no visible bubbles.
Ambient air temperature around condensing unit is not getting excessively hotter.
Both king valves have been back seated.
Nuts have been installed back on the king service ports.
Protective nuts have been installed back on the king valve over the stem.
CHECK BEFORE LEAVING YOUR JOB SITE
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