Service Manual
SERVICE AND MAINTENANCE FAN COILS
24 496 08 8001 02
Specifications subject to change without notice.
6. Remove the three bolts holding motor mount to blower
housing and slide motor and mount out of housing.
Further disassembly should not be necessary as
adequate clearance is available.
7. Remove blower wheel from housing by removing cutoff
plate from blower housing outlet. Note wheel orientation
and cutoff location for reassembly. The blower motor
and wheel may be cleaned by using a vacuum with a
soft brush attachment.
8. Remove grease with a mild solvent such as hot water
and detergent. Be careful not to disturb balance weights
(clips) on blower−wheel vanes. Also, do not drop or
bend wheel, as balance will be affected.
To reassemble blower:
1. Place blower wheel back into housing. Be sure to
position correctly for proper location.
2. Reassemble cutoff plate to housing using identified
holes from disassembly procedure.
3. Position motor and mount in same position as when
blower housing was in unit. Secure motor mount on
housing, using removed bolts. Make sure mount or
motor is grounded to blower housing.
4. Locate blower wheel setscrew over flat on motor shaft.
Rotate wheel in housing. It should not rub housing and
should be centered in inlet opening. If not, loosen
setscrew and align as necessary.
5. Attach green wire to blower housing with screw.
6. (If applicable). Secure motor capacitor under strap and
tighten strap screw.
7. Slide blower assembly to blower deck. Be sure (once
blower is within the unit casing) to force blower
assembly toward control box while sliding assembly into
unit to ensure that blower assembly engages deck
properly.
8. Fasten blower assembly to deck with screws previously
removed.
9. Reconnect electrical leads to fan coil control.
10. Reconnect electrical power to unit and test fan for
proper rotation.
FSA4, FEA4, FMA4, WAMA, WAXA
The minimum maintenance requirements for this equipment
are as follows:
1. Inspect and clean or replace air filter each month or as
required.
2. Inspect cooling coil, drain pan, and condensate drain
each cooling season for cleanliness. Clean as
necessary.
3. Inspect blower motor and wheel for cleanliness each
heating and cooling season. Clean as necessary.
4. Inspect electrical connections for tightness and controls
for proper operation each heating and cooling season.
Service as necessary.
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use
care and wear appropriate protective clothing and gloves
when handling parts.
CAUTION
!
A. Air Filter
The air filter should be replaced as needed.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage.
Never operate unit without a filter.
CAUTION
!
B. Cooling Coil, Drain Pan, and Condensate Drain
The cooling coil is easily cleaned when it is dry. Inspect coil
and clean (if necessary) before each cooling season. To check
or clean cooling coil, remove blower/heater access panel to
gain full access to cooling coil. If coil is coated with dirt or lint,
vacuum with a soft brush attachment.
Be careful not to bend coil fins. If coil is coated with oil or
grease, clean it with a mild detergent and water solution. Rinse
coil with clear water.
Be careful not to splash water onto insulation.
Inspect drain pan and condensate drain at same time cooling
coil is checked. Clean drain pan and condensate drain by
removing any foreign matter from pan. Flush pan and drain
tube with clear water.
If drain tube is restricted, it can generally be cleared by
high−pressure water. Cut plastic line and work outside
condensate pan and away from coil to clear drain tube.
NOTE: There MUST be a trap in condensate line. Trap must
be at least 3−in. deep, not higher than the bottom of unit
condensate drain opening, and pitched downward to an open
drain or sump.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage.
Do not use caustic household drain cleaners in the
condensate pan or near the coil. Drain cleaners can
quickly destroy a coil.
CAUTION
!
C. Blower Motor and Wheel
Clean blower motor and wheel when cooling coil is cleaned.
To clean or service wheel or motor, proceed as follows:
1. Pull unit disconnect (when used) and remove blower
access panel.
2. Disconnect motor electrical leads from control box and
capacitor. Mark location of wires for reassembly.
3. Remove the three bolts holding motor mount to blower
housing while supporting motor shell with hand.
4. Pull motor inlet ring and blower wheel assembly out of
blower housing.
5. With blower wheel, inlet ring, and motor mount still
attached to motor, place motor on flat, horizontal
surface, shaft up. Mark position of wheel on motor shaft
for reassembly.
6. Loosen blower wheel setscrew and remove blower
wheel from motor shaft.
NOTE: Further disassembly of motor and mount is not
necessary as adequate clearance is available to clean motor.
7. Clean blower motor and wheel using a vacuum with a
soft brush attachment. Remove grease with a mild
solvent such as hot water and detergent. Be careful not
to disturb balance weights (clips) on blower wheel