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1. Condensing Unit
• Place the condensing units WM150-650SCU in a properly ventilated
location. If it is not, heat exhausted by the condensing unit will build up
and the cooling system will not operate properly.
• Leave minimum 5 feet clearance for the exhaust side and leave minimum
1 foot clearance for the fresh air intake side.
• Condensing unit shall be elevated to avoid possible flooding and shaded
from direct sun. It shall not be exposed to temperatures higher than 110
°F or lower than 45 °F (optional low ambient kit for 20 °F).
2. Evaporator Unit
• The WM15-65SFCL evaporator units shall be installed for ceiling mount
with the air supply towards horizontally and air return on the bottom.
• 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