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START-UP
42TW unit is designed to operate in hot and
humid
conditions
problem because of the rubber insulated
drain pan. Refer to the startup checklist in
page 11 for startup procedure.
SERVICE
TO CLEAN COIL
1. Be sure electrical service switch is open,
locked, and tagged while working on unit.
2. Remove supply-air grille access panel and
brush between coil fins with stiff wire brush.
Follow-up by cleaning with vacuum cleaner. If
coil is cleaned with air hose and nozzle, take
care not to drive dirt and dust into other
components.
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 5/8-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 front or
bottom panel.
without
condensation
Fig.7
Fan assembly may be removed from its
tracks if unit has a long conduit lead. Use a
stiff brush or vacuum to remove dirt and
debris from scroll.Wipe all fan surfaces with a
damp cloth.
CLEAN ELECTRIC HEATER
Lock open and tag unit electrical service
switch.
1. Remove dust, dirt, or foreign material
before start-up. Do not block normal airflow to
and from units; blockage may damage
electric heaters.
2. Clean heater elements with soft brush or
vacuum cleaner as necessary.
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
a good quality filter. Do not attempt to clean
and reuse disposable filters.
PERMANENT FILTER
1. Tap on solid surface to dislodge heavy
particles.
2. Wash in hot water.
3. Set filter on end so that water drains out
through slots in frame. Allow filter to dry
thoroughly.
See Fig.7 for filter access.
Filter Access.
- 13-
Replace filter with
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