ICP PGN324 Installation instructions manual - Warning
20
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 at the
beginning of each heating and cooling season. Clean
when necessary. For first heating and cooling season,
inspect blower wheel bi--monthly to determine proper
cleaning frequency.
4. Check electrical connections for tightness and controls
for proper operation each heating and cooling season.
Service when necessary.
5. Ensure electric wires are not in contact with refrigerant
tubing or sharp metal edges.
6. Check and inspect heating section before each heating
season. Clean and adjust when necessary.
7. Check flue hood and remove any obstructions, if
necessary.
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 Table 1 for 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, or whenever the filter becomes clogged with dust
and lint.
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 and tag electrical power to the unit before
cleaning and lubricating the blower motor and wheel.
!
WARNING
To clean the blower motor and wheel:
1. Remove and disassemble blower assembly as follows:
a.
Remove unit access panel.
b.
Disconnect motor lead from blower relay (BM).
Disconnect ytellow lead from terminal L2 of the
contactor.
c.
On all units remove blower assembly from unit.
Remove screws securing blower to blower partition
and slide assembly out. Be careful not to tear
insulation in blower compartment.
d.
Ensure proper reassembly by marking blower
wheel and motor in relation to blower housing
before disassembly.
e.
Loosen setscrew(s) that secures wheel to motor
shaft, remove screws that secure motor mount
brackets to housing, and slide motor and motor
mount out of housing.
2. Remove and clean blower wheel as follows:
a.
Ensure proper reassembly by marking wheel
orientation.
b.
Lift wheel from housing. When handling and/or
cleaning blower wheel, be sure not to disturb
balance weights (clips) on blower wheel vanes.
c.
Remove caked--on dirt from wheel and housing
with a brush. Remove lint and/or dirt accumulations
from wheel and housing with vacuum cleaner,
using soft brush attachment. Remove grease and
oil with mild solvent.
d.
Reassemble wheel into housing.
e.
Reassemble motor into housing. Be sure
setscrews are tightened on motor shaft flats and
not on round part of shaft.
f.
Reinstall unit access panel.
3. Restore electrical power to unit. Start unit and check for
proper blower rotation and motor speeds during
heating and cooling cycles.
FLUE GAS PASSAGEWAYS
To inspect the flue collector box and upper areas of the heat
exchanger:
1. Remove the combustion blower wheel and motor
assembly
according
to
directions
in
the
Combustion--Air Blower section.
2. Remove the 3 screws holding the blower housing to the
flue collector box cover (See Fig. 15--18).
3. Remove the 12 screws holding the flue collector box
cover (See Fig. 17--18) to the heat exchanger
assembly. Inspect the heat exchangers.
4. Clean all surfaces, as required, using a wire brush.
INDUCED DRAFT (COMBUSTION AIR) BLOWER
Clean periodically to assure proper airflow and heating
efficiency. Inspect blower wheel every fall and periodically
during the heating season. For the first heating season,
inspect blower wheel bimonthly to determine proper
cleaning frequency.
To inspect blower wheel, remove draft hood assembly.
Shine a flashlight into opening to inspect wheel. If cleaning
is required, remove motor and wheel as follows:
1. Remove unit access panel (See Fig. 16).
2. Remove the 7 screws that attach induced--draft motor
mounting plate to blower housing (See Fig. 17).
3. Slide the motor and blower wheel assembly out of the
blower housing (See Fig. 17). Clean the blower wheel.
If additional cleaning is required, continue with Steps 4
and 5.
4. To remove blower, remove 2 setscrews.
5. To remove motor and cooling fan assembly, remove 4
screws that hold blower housing to mounting plate.
6. To reinstall, reverse the procedure outlined above.
LIMIT SWITCH
Remove unit access panel. Limit switch is located on the
blower partition.