Vinotemp WINEMATE VINO-1900SS - Manual (Page 3)

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• There is a gravity drain line and the unit shall be installed level or with a
slight angle toward the drain connection. If rise-up is needed, a
condensation pump must be used.
4. Refrigeration Piping, Evacuating, Charging and Starting
CAUTION:
• ALWAYS USE THE SUPERHEAT AND SUBCOOLING, PRESSURE
READINGS TO CHARGE REFRIGERANT PROPERLY, THE LISTED
CHARGES ARE FOR REFERENCE ONLY.
• CHARGE 15% MORE REFRIGERANT IN THE SUMMER IF THE UNIT IS
EQUIPPED WITH A LOW AMBIENT CONDITION KIT.
• The installation order starts from condensing unit (including the receiver,
discharge valve), liquid line filter-drier, moisture-liquid indicator/sight glass,
liquid line, to evaporator unit (including liquid line connection, solenoid
valve, expansion valve, and suction line connection), returning to insulated
suction line, suction valve and then condensing unit.
• Use inverted siphons to prevent liquid from flooding back to the
compressor and aid oil returning to the compressor.
• Charge the system after pipe brazing, leak testing and evacuating.
• 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 superheat is set around 8-10
° F at factory.
• The temperature split crossing the evaporator shall be 8-10
° F at 55 ° F
wine room temperature.
• Suction pressure: 30-35 psig
• Head pressure: 125-150 psig at 70 -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-1500SS <= 50 FT
1/4"
OD
3/8” OD 1/2” OD
R134a/
15 OZ
VINO-1900SS <=50 FT
1/4"
OD
3/8” OD 3/8” OD
R134a/
15 OZ
NOTES:
• THE VALVE CONNECTION SIZES OF CONDENSING UNIT AND THE LINE
CONNECTION SIZES OF EVAPORATOR UNIT ARE NOT NECESSARY
THE SAME AS THE ABOVE SPECIFIED LINE SIZES.
• IF THE CONDENSING UNIT IS INSTALLED ABOVE THE EVAPORATOR
UNIT, USE THE SUCTION LINE ONE LISTED SIZE SMALLER.