Vinotemp WINE-MATE WM-2520SSL, Operation Care Installation Manual

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Fig. 14 Condenser Fan Cycle Control
2) The subcooling at the condensing unit shall be around 10°F. The charge may be
complete when there are no more bubbles forming in the liquid indicator.
3) The head pressure shall be 120 ~ 150 psig at 70 ~ 90 °F condensing unit
operating temperatures.
4)
The evaporator’s constant pressure expansion valve is set around 30 ~ 35 psig
(35 ~ 40°F) at factory. This pressure setting gives a dew point to maintain the
proper humidity for storing wine.
5) The temperature split across the evaporator shall be 8 ~ 10°F at 55°F wine cellar
temperature.
6) Again, you must verify if the superheat at the evaporator unit is 9 ~ 18°F at 55
°F ~ 65 °F wine cellar temperatures.
7) If the superheat is high, check the subcooling first to see if the refrigerant charge
is sufficient. If the charge is not sufficient, add more refrigerant (Liquid must
always be charged into the hide side when the compressor runs). If the charge
is good, then increase the evaporator suction pressure by turning the hex nut
(5/16”) clockwise.
8) If the superheat is low, then decrease the evaporator suction pressure by turning
the hex nut
(5/16”) counter-clockwise.
Fig. 15 Expansion Valve