Vintage Cellars Platinum MIni Split Tech Manual - Manual (Page 31)

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Measure Superheat
If superheat is high and bubbles are present, add more refrigerant until it is clear. If superheat is low (around 4-6
degrees Fahrenheit) and bubbles are present in the sight glass, check for liquid refrigerant entering the compressor
as evidenced by cool crankcase below 100- 110 degrees Fahrenheit and low discharge superheat. Adjust TXV setting
in small increments to increase superheat and stop liquid from going to the compressor. Check this before adding
more refrigerant. If the temperature of the 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 the
condensing temp is above 115 degrees Fahrenheit. Retain blockage if necessary to maintain stability for performance
test listed in the Split System Warranty Checklist. If the air is cold, below 60 degrees Fahrenheit entering the condenser
and the sight glass is clear; allow the system to run for a while until the cellar cools off, then measure and record data
on the Split System Warranty Checklist.
Confirm the controller is displaying the correct temperature and that the controller is not displaying an alarm. If the
controller is displaying an alarm reference page 33 for corrective action. Confirm that the suction line is completely
insulated, from TXV to compressor. Confirm that the sight glass has no bubbles and the ambient temperature around
the condensing unit is not getting excessively hotter. Confirm that both king valves have been back seated and the
nuts have been installed back on the king service ports.
INSTALLING THE CONDENSING UNIT (continued)