Owner`s manual

- 8 -
1. Condensing Unit
• Place the condensing units WM250-850SCU 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.
• 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).
• Leave minimum 5 feet clearance for the exhaust side and leave minimum
1 foot clearance for the fresh air intake side.
2. Evaporator Unit
• The WM25-85SFCH evaporator units can be installed outside a wine
room.
• Supply and return air flow from the evaporator unit shall be unobstructed
for at least 1 foot.
• 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.
3. Air Sensor
• The air sensor is recommended to place in the wine room.
• If it is in a return duct, the evaporator fans shall be running all the time.
Due to the temperature differential the temperature setting needs to be
adjusted in order to maintain the proper wine room temperature.
4. Air Flow
• If the overall duct length is more or less than 50ft, it is necessary to check
the air flow to meet the specified CFM. It may use larger or smaller size
ducts or fan speed control to adjust the system refrigeration performance
to achieve 8-10°F differential between return air and supply air.
5. 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,
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.