Bryant DURAPAC PLUS SERIES 542J, Installation, Start-Up And Service Instructions Manual

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SERVICE
I. CLEANING
Inspect unit interior at beginning of each heating and cool-
ing season and as operating conditions require. Remove unit
top panel and/or side panels for access to unit interior.
A. Indoor Coil
Clean as required with a commercial coil cleaner.
B. Outdoor Coil
Clean outdoor coil annually and as required by location and
outdoor-air conditions. Inspect coil monthly — clean as
required.
C. Condensate Drain
Check and clean each year at start of cooling season.
D. Filters
Clean or replace at start of each heating and cooling season,
or more often if operating conditions require. Refer to Table 1
for type and size.
E. Outdoor-Air Inlet Screens
Clean screens with steam or hot water and a mild detergent.
Do not use throwaway filters in place of screens.
II. LUBRICATION
A. Compressors
Each compressor is charged with the correct amount of oil at
the factory. Observe the level in the sight glass immediately
after shutdown while the oil is still warm. If the oil level is
observed when the oil is cold, the level observed may be a
mixture of oil and refrigerant which is not a true indication
of the oil level. If oil level observed is not between the low
limit and high limit levels as indicated in Fig. 33, add oil
until it is in the correct range.
B. Fan Shaft Bearings
For size 150 units, bearings are permanently lubricated. No
field lubrication is required. For size 180 units, the bearings
are of the pillow block type and have grease fittings. The
bearing opposite the motor end has an extended tube line so
it can be lubricated from the motor side. Lubricate the bear-
ings twice annually.
Typical lubricants are given below:
*Preferred lubricant because it contains rust and oxidation inhibitors.
C. Outdoor and Indoor-Fan Motor Bearings
The outdoor and indoor-fan motors have permanently sealed
bearings, so no field lubrication is necessary.
III. INDOOR FAN, 542J150 UNITS
A. Performance Adjustment
Fan motor pulleys on the 542J150 units are factory set for
speed shown in Table 1.
To change fan speeds:
1. Shut off unit power supply.
2. Loosen belt by loosening fan motor mounting plate
nuts.
3. Loosen movable-pulley flange setscrew (see Fig. 34).
4. Screw movable flange toward fixed flange to increase
speed and away from fixed flange to decrease speed.
Increasing fan speed increases load on motor. Do not
exceed maximum speed specified in Table 1.
5. Set movable flange at nearest keyway of pulley hub
and tighten setscrew.
To align fan and motor pulleys:
1. Loosen fan pulley setscrews.
2. Slide fan pulley along fan shaft.
3. Make angular alignment by loosening motor from
mounting plate.
B. Service and Replacement (see Fig. 35)
NOTE:
To remove belts only, follow Steps 1-7.
1. Remove filter and supply-air section panels.
2. Remove unit top panel.
3. Remove coil guard.
4. Loosen screws A and B on both sides of motor mount
assembly.
5. Loosen screw C.
6. Rotate motor mount assembly (with motor attached)
as far as possible away from indoor coil.
7. Remove belt.
8. Rotate motor mount assembly back past original
position toward indoor coil.
9. Remove motor mounting nuts D and E (both sides).
10. Lift motor up through top of unit.
11. Reverse Steps 1-10 to install new motor.
12. Check and adjust belt tension as necessary.
WARNING: Before performing service or mainte-
nance operations on unit, turn off main power switch to
unit. Turn off accessory heater power switch if applicable.
Electrical shock could cause personal injury.
MANUFACTURER LUBRICANT
Texaco Regal AFB-2*
Mobil Mobilplex EP No. 1
Sunoco Prestige 42
Texaco Multifak 2
Fig. 33 — Compressor Sight Glass Oil Level
Fig. 34 — Indoor-Fan Pulley Alignment and Adjustment