Owner`s manual

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• 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.
• If the superheat is high, check the subcooling first to know if the refrigerant
charge is sufficient. If the charge is not sufficient, add more refrigerant. If
the charge is good, then increase the evaporator suction pressure by
turning the hex nut (5/16”) clockwise.
• If the superheat is low, then decrease the evaporator suction pressure by
turning the hex nut (5/16”) counter-clockwise.
• Low side pressure: 33-35 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
INSULATED
DUCT
DRAIN
LINE
CHARGE
VINO-
2500SSH
<= 50 FT 1/4" OD 3/8” OD 8” 7/8” OD
R134a/
20 OZ
VINO-
4500SSH
<= 50 FT 1/4" OD 1/2” OD 8” 7/8” OD
R134a/
26 OZ
VINO-
6500SSH
<= 50 FT 1/4" OD 1/2” OD 10” 7/8” OD
R134a/
32 OZ
VINO-
8500SSH
<= 50 FT 3/8" OD 5/8” OD 10” 7/8” OD
R134a/
38 OZ
NOTES:
1) THE VALVE CONNECTION SIZES OF CONDENSING UNIT AND
THE LINE CONNECTION SIZES OF EVAPORATOR UNIT ARE NOT
NECESSARY THE SAME AS THE ABOVE LISTED LINE SIZES.
2) IF THE CONDENSING UNIT IS INSTALLED ABOVE THE
EVAPORATOR UNIT, USE THE SUCTION LINE ONE LISTED SIZE
SMALLER.
6. Pressure, Superheat and Subcooling Readings
NOTES: THE VALVES MUST BE IN THE MIDDLE POSITIONS TO READ
PROPERLY.
Complaint Possible Causes
a. High suction pressure and low head pressure
b. High suction pressure and low head pressure
Low superheat and low subcooling
c. High suction pressure and high head pressure
a. Compressor may be bad
b. Expansion valve opened, too
much oil
c. Overcharge