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• Supply and return air flow from the evaporator unit shall be unobstructed
for at least 1 foot.
• There is a gravity drain line so that it can not be installed above the
evaporator unit. Otherwise a condensation pump must be used.
3. Air Sensor
• The air sensor can be located in the wine room or the return air area, but
not the supply air area.
4. Refrigeration Piping and Charging
NOTES: ALWAYS USE THE SUPERHEAT AND SUBCOOLING,
PRESSURE READINGS TO CHARGE REFRIGERANT PROPERLY, THE
LISTED CHARGES ARE FOR REFERENCE ONLY.
• The installation order starts from condensing unit (including the receiver),
liquid line filter-drier, moisture-liquid indicator (sight glass), liquid line,
evaporator unit (including liquid line solenoid valve and thermostatic
expansion valve or automatic expansion valve), suction line, and returning
to condensing unit.
• 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 sight
glass.
• The evaporator’s constant pressure expansion valve is set around 38-
40°F at factory. This pressure setting gives a dew point to maintain the
humidity for storing wine.
• The superheat at the evaporator unit shall be around 9-18°F under low
and high load at 75°F ambient temperature.
• Low side pressure: 33 psig
• High side pressure: 130 -150 psig at 75 -90
°F ambient temperatures
The line sizes and refrigerant charges are listed as follows.
MODEL
REFRIGERATION
LINES
LIQUID
LINE
SUCTION
LINE
DRAIN
LINE
CHARGE
VINO-
1500SSW
< 50 FT
1/4"
OD
3/8” OD 1/2” OD
R134a/
15 OZ
VINO-
2500SSW
< 50 FT
1/4"
OD
3/8” OD 1/2” OD
R134a/
20 OZ
5. Pressure, Superheat and Subcooling Readings
NOTES: THE VALVES MUST BE IN THE MIDDLE POSITIONS TO READ
PROPERLY.