Check Drain
Lock open and tag unit electrical service switch. Check drain pan, drain line and trap at start of each cooling
season. A standard type pipe cleaner for 3/4-in. ID pipe can be used to ensure that pipe is clear of obstruction so
that condensate is carried away.
Clean Fan Wheel
Lock open and tag unit electrical service switch. For access to fan assembly, remove supply air duct and bottom
panel. Use a stiff brush or vacuum to remove dirt and debris from scroll. Wipe all fan surfaces with a damp cloth.
Clean or Replace Air Filters
Lock open and tag unit electrical service switch. At the start of each cooling season and after each month of
operation (more or less depending on operating conditions) replace throwaway filter or clean permanent filter.
Throwaway Filter:
Replace filter with a good quality filter of the size shown in “Physical Data”. Do not attempt to
clean and reuse disposable filters.
Permanent Filter:
Tap on solid surface to dislodge heavy particles. Wash in hot water. Set filter on end so that
water drains out through slots in frame. Allow filter to dry thoroughly.
Typical Wiring Schematic
Wiring Diagram: FCU FB ECM Motor Cool and Electric Heater
Application: 50Hz (18 - 60)
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