Identifying Factory Option; Unit Installation With 2-Speed Indoor Fan Motor Option.6; Additional Vfd Installation And; Troubleshooting - Bryant Preferred Series Service And Maintenance Instructions

Identifying Factory Option

This section only applies to units that meet the criteria detailed
in Table 1. If the unit does not meet that criteria, disregard this
section.
Table 1 — Model Size/VFD Option Indicator
POSITION IN
MODEL/SIZES
MODEL NUMBER
581J 17-28
NOTE: See Fig. A in Appendix A for the model number
nomenclature.
Unit Installation with 2-Speed Indoor Fan Motor
Option
581J ROOFTOP
Refer to the base unit installation instructions for standard required
operating and service clearances.
NOTE: The Remote VFD Keypad is a field-installed option. It is
not included as part of the factory-installed VFD option. See Vari-
able Frequency Drive (VFD) Installation, Setup and Trouble-
shooting Supplement for wiring schematics, performance charts,
and configuration. See Fig. 8 for location of the VFD as mounted
on the various 581J models.
Fig. 8 — VFD Location for 581J 17-28 Units

ADDITIONAL VFD INSTALLATION AND

TROUBLESHOOTING

Additional installation, wiring and troubleshooting information
for the VFD can be found in the following manual: Variable Fre-
quency Drive (VFD) Installation, Setup and Troubleshooting
Supplement.

MOTOR

When replacing the motor, use the following steps. See Fig. 9.
VFD FIOP
INDICATOR
17 D
VARIABLE
FREQUENCY
DRIVE (VFD)
JACK BOLT (2)
Fig. 9 — Replacing Belt-Driven Motor

Replacing the Motor

Use the following steps to replace the belt-driven motor.
1. Turn off all electrical power to the unit. Use approved
lockout/tag-out procedures on all electrical power sources.
2. Remove cover on motor connection box.
3. Disconnect all electrical leads to the motor.
4. Loosen the two jack bolt jamnuts on the motor mounting
bracket.
5. Turn two jack bolts counterclockwise until motor assem-
bly moves closer to blower pulley.
6. Remove V-belt from blower pulley and motor pulley.
EQUIPMENT DAMAGE HAZARD
Failure to follow this CAUTION can result in premature wear
and damage to equipment.
Do not use a screwdriver or a pry bar to place the new V-belt in
the pulley groove. This can cause stress on the V-belt and the
pulley resulting in premature wear on the V-belt and damage
to the pulley.
7. Loosen the four mounting bracket bolts and lock washers.
8. Remove four bolts, four flat washers, four lock washers
and four nuts attaching the motor mounting plate to the
unit. Discard all lock washers.
9. Remove motor and motor mounting bracket from unit.
10. Remove four bolts, flat washers, lock washers and single
external-tooth lock washer attaching motor to the motor
mounting plate. Discard all lock washers and external-
tooth lock washer.
11. Lift motor from motor mounting plate and set aside.
12. Slide motor mounting band from old motor.
13. Slide motor mounting band onto new motor and set motor
onto the motor mounting plate.
14. Remove variable pitch pulley from old motor and attach it
to the new motor.
15. Inspect variable pitch pulley for cracks and wear. Replace
the pulley if necessary.
16. Secure the pulley to the motor by tightening the pulley set-
screw to the motor shaft.
17. Insert four bolts and flat washers through mounting holes
on the motor into holes on the motor mounting plate.
18. On one bolt, place a new external-tooth lock washer
between the motor and motor mounting band.
19. Ensure the teeth of the external-tooth lock washer make
contact with the painted base of the motor. This washer is
essential for properly grounding motor.
20. Install four new lock washers and four nuts on the bolts on
the bottom of the motor mounting plate.
6
BLOWER PULLEY
V-BELT
MOTOR PULLEY
MOTOR
MOTOR MOUNTING
BRACKET BOLTS (4)
JACK BOLT JAM NUT (2)
MOTOR MOUNTING
BRACKET (2)
CAUTION