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50ZHK: Installation Instructions
Maintenance
To ensure continuing high performance, and to minimize the possibility
of premature equipment failure, periodic maintenance must be
performed on this equipment. This cooling unit should be inspected at
least once each year by a qualified service person. To troubleshoot unit,
refer to
Table
9, Troubleshooting Chart.
NOTE TO EQUIPMENT OWNER: Consult your local dealer about the
availability of a maintenance contract.
WARNING
!
PERSONAL INJURY AND UNIT DAMAGE HAZARD
Failure to follow this warning could result in personal injury or death
and possible unit component damage.
The ability to properly perform maintenance on this equipment requires
certain expertise, mechanical skills, tools and equipment. If you do not
possess these, do not attempt to perform any maintenance on this
equipment, other than those procedures recommended in the Owner's
Manual.
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
1.
Turn off electrical power to the unit and install lockout tag
before performing any maintenance or service on this unit.
2.
Use extreme caution when removing panels and parts.
3.
Never place anything combustible either on or in contact with
the unit.
WARNING
!
UNIT OPERATION HAZARD
Failure to follow this caution may result in equipment damage or
improper operation.
Errors made when reconnecting wires may cause improper and
dangerous operation. Label all wires prior to disconnecting when
servicing.
The minimum maintenance requirements for this equipment are as
follows:
1. Inspect air filter(s) each month. Clean or replace when necessary.
2. Inspect indoor coil, drain pan, and condensate drain each cooling
season for cleanliness. Clean when necessary.
3. Inspect blower motor and wheel for cleanliness each cooling
season. Clean when necessary.
4. Check electrical connections for tightness and controls for proper
operation each cooling season. Service when necessary.
5. Ensure electric wires are not in contact with refrigerant tubing or
sharp metal edges.
Air Filter
IMPORTANT: Never operate the unit without a suitable air filter in the
return-air duct system. Always replace the filter with the same
dimensional size and type as originally installed. See
recommended filter sizes.
Inspect air filter(s) at least once each month and replace
(throwaway-type) or clean (cleanable-type) at least twice during each
cooling season and twice during the heating season if electric heat is
installed, or whenever the filter becomes clogged with dust and lint.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Unit Top Removal
NOTE:
When performing maintenance or service procedures that
require removal of the unit top, be sure to perform all of the routine
maintenance procedures that require top removal, including coil
inspection and cleaning, and condensate drain pan inspection and
cleaning.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Disconnect electrical power, and install lockout tag to the unit before
removing top.
Only qualified service personnel should perform maintenance and
service procedures that require unit top removal.
Refer to the following top removal procedures:
1. Unplug all three wires from the outdoor fan motor.
2. Remove screws on unit top cover flange. (Save all screws.)
3. Lift top from unit carefully. Set top on edge and make sure that top
is supported by unit side that is opposite duct (or plenum) side.
4. Carefully replace and secure unit top to unit, using screws removed
in Steps 1 and 2, when maintenance and/or service procedures are
completed.
Indoor Blower and Motor
NOTE: All motors are pre-lubricated. Do not attempt to lubricate these
motors.
For longer life, operating economy, and continuing efficiency, clean
accumulated dirt and grease from the blower wheel and motor annually.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Disconnect electrical power, and install lockout tag to the unit before
cleaning and lubricating the blower motor and wheel.
To clean the blower wheel:
1. Remove the blower housing:
a. Remove the screws on the external side of the duct panel that
fasten the housing to the duct panel assembly.
b. Remove the side access panel and unscrew the mounting bracket
that fastens the blower housing to the internal partition panel of
the control box assembly.
c. Make sure that the blower housing is supported by hand before
completely removing the mounting bracket.
d. Slide the blower housing from the rails of the duct panel and
place it outside the unit.
2. Remove the blower wheel from the housing:
a. Loosen the set screw which secures the wheel to the motor shaft.
b. Loosen the three mounting legs of the motor by removing the
bolts that fasten the mounting legs to the housing.
c. Slide out the motor assembly (motor, belly band and the 3
mounting legs) from the hub of the wheel.
d. Remove the filler panel at the discharge end of the blower
housing by removing the two screws that fasten it to the housing.
Table 1
for
e. Ensure proper reassembly by marking wheel orientation.
Remove the wheel from the housing.
3. Remove the caked on dirt from the wheel and the motor using a
brush.
4. Remove lint and dirt accumulations from the wheel and housing
with a vacuum cleaner, using a soft brush attachment.
17
WARNING
!
WARNING
!
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