Outdoor Unit Condensate Piping - Lennox MMA018SM4 Service Manual

12. Outdoor Unit Condensate Piping

Condensate formed during the heating and defrost processes must be drained from heat pump units. Drain holes are
provided in the base of the units to ensure proper drainage. Heat pumps must be raised when installed on a concrete
pad or the ground to allow drainage to occur. If the heat pump unit is installed on wall mounting brackets, insert the
provided drain connector into one of the 1 inch (25 mm) drain holes and attached a field-provided insulated drain
hose to the connector. Use field-provided rubber plugs to cover any unused drain holes.
Drain
Connector
Condensate Drain
(location varies per model)
Chassis
Figure 21. Condensate Drainage Requirement
63
Note: Used if the unit is hanging on the wall and
needs to have the water moved away.