Care And Maintenance; Fcm4, Fem4, Fev, Fjm, Fxm4, Fvm4, Wap, Wah, Wax, Wbhl, Rem4 - Carrier FCM4 Service And Maintenance Instructions

FCM4, FEV, FEM4, FJM, FMA4, FSA4, FSM4, FSU4, FVM4, FXM4, REM4, WAH, WAM, WAP, WAX, WBHL: Service and Maintenance Instructions
Relays
Later production EHK2 heaters have relays controlling the heater
elements instead of sequencers. A small rectifier PCB is mounted to
each relay which converts the incoming 24VAC control signal to DC.
In addition to the rectifier circuit, the second and third stage relays
contain a time-on delay circuit of five seconds for second stage, and
eight seconds for third stage. When the control signal is removed from
the relays, all relays will open with no time-off delay.

CARE AND MAINTENANCE

FCM4, FEM4, FEV, FJM, FXM4, FVM4, WAP, WAH,
WAX, WBHL, REM4
To continue high performance, and minimize possible equipment failure,
it is essential periodic maintenance be performed on this equipment.
The ability to properly perform maintenance on this equipment requires
certain mechanical skills and tools. The only consumer service
recommended or required is filter maintenance. See
ASSEMBLY on pg 22.
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Disconnect all power to the unit before servicing the field wires or
removing the control package. The disconnect (when used) on the
access panel does not disconnect power to the line side of the
disconnect, but does allow safe service to all other parts of the unit.
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.
CAUTION
!
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.
FILTER ASSEMBLY
To clean or replace air filter, push plastic connectors toward center of
unit and remove filter access panel outward. Push filter up and back into
unit. Then slide filter out.
Clean filter by using cold water and mild detergent. Rinse and allow
filter to dry. No oiling or coating of filter is required.
New filters are available from your local distributor. Place filter in slot
with cross-mesh binding up or facing cooling coil and replace filter
access panel.
COOLING COIL, DRAIN PAN, AND CONDENSATE
DRAIN
The cooling coil is easily cleaned when it is dry. Inspect the coil and
clean (if necessary) before each cooling season. To check or clean
cooling coil, remove coil access panel. If coil is coated with dirt or lint,
vacuum it with a soft brush attachment.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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 thoroughly with
clear water. Be careful not to splash water on insulation.
Inspect drain pan and condensate drain at the 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 clean drain tube.
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.
FILTER
BLOWER MOTOR AND WHEEL
Clean blower motor and wheel when cooling coil is cleaned.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Disconnect electrical power before removing any access panels. Lock
out and tag switch with a suitable warning label.
To clean blower motor or blower wheel:
1. Remove blower access panel.
2. Remove motor leads from fan coil control. Note lead location for
ease of reassembly.
3. Remove the two outside screws holding blower/motor assembly
against blower deck flange and slide assembly out of cabinet.
4. (If applicable) Remove screw in strap holding motor capacitor to
blower housing and slide capacitor out from under strap. Remove
screw with green wire from blower housing. Mark blower wheel,
motor, and motor support in relation to blower housing before
disassembly to ensure proper reassembly. Note position of blades
on wheel.
5. Loosen setscrew holding blower wheel onto motor shaft.
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.
22
CAUTION
!
WARNING
!