Bryant 564B - Manual (Page 15)

WARNING: FIRE, EXPLOSION, ELECTRICAL
SHOCK, CUT HAZARD
Failure to follow these warnings could result in serious
personal injury, death, and/or property damage:
1. Turn off electrical power to the unit and install lockout
tag before performing any maintenance or service on
the unit.
2. Use extreme caution when removing panels and parts.
As with any mechanical equipment, personal injury
can result from sharp edges, etc.
3. Never place anything combustible either on, or in
contact with, the unit.
I. AIR FILTER
NOTE: Never operate the unit without a suitable air filter in the
return-air duct system. Always replace the filter with the same size
as originally installed. See Table 2 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 or whenever the filters become clogged with
dust and lint.
Replace filters with the same dimensional size and type as
originally provided, when necessary.
II. UNIT TOP REMOVAL (OUTDOOR-COIL SIDE)
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.
WARNING: ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Disconnect and tag electrical power 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. Remove screws on unit top cover surface. (Save all screws.)
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.
III. INDOOR BLOWER AND MOTOR
For longer life, operating economy, and continuing efficiency,
clean accumulated dirt and grease from the blower wheel and
motor annually.
WARNING: 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 the blower wheel.
To clean the blower wheel follow the following steps:
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 fo 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 remov-
ing the bolts that fasten themounting 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.
e. Remove the wheel form 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 attach-
ment.
5. Remove grease and oil with a mild solvent.
6. Reassemble
a. Slip the wheel back in the housing with the hub set screw
parented in the correct direction.
b. Install the filler panel.
c. Reinsert the motor assembly in the wheel hub and align
the mounting legs with the housing mounting hold
locations.
d. Tighten the mounting bolts to fasten the motor assembly
with the housing.
e. Center the wheel in the housing by sliding it, align the
flat end of the shaft with the set screw and tighten the set
screw.
f. Slide back the blower housing into the mounting rails in
the duct panel and install the mounting bracket back in its
position.
g. Install the screws on the external side of the duct panel
to fasten duct panel with the housing.
h. Replace the side access panel.
IV. OUTDOOR COIL, INDOOR COIL, AND CONDEN-
SATE DRAIN PAN
Inspect the outdoor coil, indoor coil, and condensate drain pan at
least once heating and cooling season. Proper inspection and
cleaning requires the removal of the unit top. See Unit Top
Removal section.
Remove all obstructions (including weeds and shrubs) that inter-
fere with the airflow through the outdoor coil. Straighten bent fins
with a fin comb. If coated with dirt or lint, clean the coils with a
TABLE 11—ACCESSORY ELECTRIC HEAT PRESSURE
DROP
(IN. WG)
HEATER KW
5-20
CFM
600 800 1000 1200 1400 1600 1800 2000 2200
0.06 0.08 0.10 0.13 0.15 0.18 0.20 0.23 0.25
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