Vinotemp WINE-MATE VINO-2500SSR Installation & Operation Manual page 7

• Supply and return air flow from the evaporator unit should be unobstructed
for at least 1 foot.
3. Refrigeration Piping and Charging
• 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 charge may be complete when there are no more bubbles forming in
the sight glass.
• 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 line sizes and refrigerant charges are listed as follows.
LIQUID
MODEL
LINE
VINO-
1/4" OD
2500SSR
VINO-
1/4" OD
4500SSR
4. Pressure Gauge Readings
Low side pressure: 33 psig; High side pressure: 130 psig at 75
temperature and 150 psig at 90
Complaint
a. High at low side and low at high side
b. High at low side and normal at high side
c. High at low side and high at high side
d. Normal at low side and high at high side
e. Low at low side and low at high side
f. Low at low side and high at high side
g. Low at low side and normal at high side
h. Vacuum at low side and normal at high side
i. Vacuum at low side and high at high side
SUCTION REFRIGERATION
LINE LINES
3/8" OD < 50 FT
1/2" OD < 50 FT
°
F ambient temperature.
a. The compressor may be bad
b. The expansion valve stuck open, too much
oil
c. Overcharge, dirty condenser, bad condenser
fans and high ambient temperature
d. Restriction in the condenser
e. Undercharge, low ambient temperature
f. Restriction in both evaporator and condenser
g. Restriction in evaporator, iced evaporator
h. The expansion valve stuck in closed position
i. Restrictions in the expansion valve, service
valve, dryer, solenoid valve, liquid line
- 6 -
DRAIN
CHARGE
LINE
1/2" OD
1/2" OD
°
F ambient
Possible Causes
R134a/
18 OZ
R134a/
24 OZ