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2) A fan speed control may be used to adjust the air flow to achieve the specified
CFM. The fan will run from the minimum speed to full speed with the control knob
at the lowest and highest speed position. To adjust the minimum speed, turn
control knob to the lowest speed position, then rotate the setting (located on the
side or front) clockwise to decrease the minimum speed or counter-clockwise to
increase the minimum speed. The minimum speed should be adjusted until it
supplies the required CFM.
3) 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.
4) The head pressure shall be 120 ~ 150 psig at 70 ~ 90 °F condensing unit
operating temperatures.
5) 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.
6) The temperature split across the evaporator shall be 8 ~ 10°F at 55°F wine cellar
temperature.
7) Again, you must verify if the superheat at the evaporator unit is 9 ~ 18°F at 55
°F ~ 65 °F wine cellar temperatures.
Fig. 13 Condenser Fan Cycle Control
Fig. 14 Fan Speed Control
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