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2) Air supply shall be unobstructed minimum 12”; air return shall be
unobstructed minimum 6”.
3) There is a gravity drain system, so the unit shall be installed level or with a
slight slope downward the drain connection and the drain line shall be
installed slope down toward the drain.
If rise-up is necessary, a condensation pump must be used.
4. Condensing Unit Location
CAUTION
Low ambient condition kit is required if the temperature will be
below 50
°
F.
1) Place the condensing units WM-250~450SCUR in a properly ventilated
location. Otherwise, heat exhausted by the condensing unit will build up and
the cooling system will not operate properly.
2) 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 50 °F.
3) Leave minimum 5 ft clearance for the air exhaust side and leave minimum 1
foot clearance for the air intake side.
5. Refrigeration Piping and Leak Testing
NOTE
The line connector sizes of liquid filter and indicator, the valve
connector sizes of condensing unit or the line connector sizes of
evaporator unit may not be the same as the listed refrigeration line
sizes.
If the condensing unit is installed above the evaporator unit, use
the suction line one size smaller.
Expansion and solenoid valves have been installed on the liquid
line in the evaporator unit.
The line sizes and refrigerant charges are listed as follows.
Model No.
Equivalent
Line Set
Liquid
Line
Suction
Line
Drain Line
Recommended
Initial Charge
WM-2500SSO
WM-2500SSO-LA
<= 75 FT
1/4" OD
3/8” OD
1/2” MPT
R134a / 19 OZ
