Pulley And Drive Adjustment; Condensate Drains; Return-Air Filters; Coil Removal - International comfort products FHS Series Installation Instructions Manual

Pulley and Drive Adjustment

To obtain desired fan speed, refer to the fan motor and drive
data in Tables 20-42 and adjust fan motor pulley as follows:
1. Remove belt from fan motor pulley after loosening
motor from motor base.
2. Loosen setscrew in moveable flange of pulley. Screw
moveable flange toward fixed flange to increase the
fan speed and away from fixed flange to reduce
speed. Before tightening setscrew, make certain that
setscrew is over nearest flat surface of pulley hub
(Fig. 26).
CAUTION
UNIT OPERATION HAZARD
Failure to follow this caution could cause equipment
damage.
Increasing fan speed produces a greater load on motor.
Do not exceed rated capacity of motor.

Condensate Drains

Keep condensate drains free of dirt and foreign matter.

Return-Air Filters

Refer to Replacing Filters section for filter accessibility and
removal. Replace with clean filters of the sizes listed in
Tables 4-11.
• After draining as much water as possible from coils,
add sufficient antifreeze to prevent residual water in
the coil from freezing.
• Add a sufficient quantity of non-corrosive antifreeze
to the entire system to prevent all water within the
system from freezing.

Coil Removal

Remove unit panels and corner posts as required. Discon-
nect coil connections and remove fastening screws. Re-
move coil through end or side sections of unit.

Cleaning Cooling Coil

Remove return-air filters. Remove any heavy dirt that may
have accumulated on underside of coil. Coil can be cleaned
more easily with a stiff brush, vacuum cleaner, or com-
pressed air when coil is dry. If coil is wet or if water is to be
used for cleaning, guard against splashing water on electri-
cal components or damaging surrounding area. Clean coil
baffles as applicable and check for tight fit to be sure air
does not bypass coil.

Cleaning Insulation

The insulation contains an immobilized antimicrobial agent
that helps prevent the growth of bacteria and fungi. Clean
the inner surface of the insulation according to the separate
maintenance instructions shipped with the unit.

Replacing Filters

Filters can be removed and installed from either side of the
unit. Install new filters in units that have one fan as follows:
1. Remove the side access panel (retain screws).
2. Remove the filter retainer clip (see Fig. 27).
508 01 1603 01
3. Remove old filters by lifting and tilting them out of the
4. Reverse the procedure to install new filters.
To install new filters in larger units that have 2 fans, follow
the preceding steps, but use the factory-supplied filter hook
to slide filters within reach for removal. The filter hook is
shipped inside the unit in the filter track.
Specifications subject to change without notice.
filter track. See Fig. 15 and 28. Use the factory-sup-
plied filter hook to slide filters within reach for
removal. The filter hook is shipped inside the unit in
the filter track.
Fig. 27 — Remove Filter Retainer Clip
Fig. 28 — Filter Removal/Replacement
FILTER
RETAINER
CLIP
31