Additional Variable Frequency Drive (Vfd) Installation And Troubleshooting; Supply Fan Motor - Carrier 48TC 04 Series Service And Maintenance Instructions

See "Variable Frequency Drive (VFD) Installation, Setup
and Troubleshooting Supplement" for wiring schematics
and performance charts and configuration.
VARIABLE
FREQUENCY
DRIVE (VFD)
Fig. 9 - - VFD Location for 48TC 08 - - 09 Units
VARIABLE
FREQUENCY
DRIVE (VFD)
Fig. 10 - - VFD Location for 48TC 12- -14 Units
VARIABLE
FREQUENCY
DRIVE (VFD)
Fig. 11 - - VFD Location for 48TC 16 Unit
Additional Variable Frequency Drive (VFD)
Installation and Troubleshooting
Additional installation,
information for the Variable Frequency Drive can be
found in the following manual: "Variable Frequency
Drive (VFD) Installation, Setup and Troubleshooting
Supplement." Have a copy of this manual on hand at
start- - up.

SUPPLY FAN MOTOR

Replacing the Motor
When replacing the motor, also replace the external- - tooth
lock washer (star washer) under the motor mounting base;
this is part of the motor grounding system. Ensure the
teeth on the lock washer are in contact with the motor's
painted base. Tighten motor mounting bolts to 120
C11528
in- - lbs.
MOUNTING
BOLTS (4)
C11529
Fig. 12 - - Replacing Belt Driven Motor
Use the following steps to replace the belt- - driven motor.
1. Turn off all electrical power to the unit. Use
approved lockout/tagout procedures on all electrical
power sources.
2. Remove cover on motor connection box.
3. Disconnect all electrical leads to the motor.
4. Loosen four mounting plate bolts.
5. Move motor assembly toward blower assembly.
6. Remove V- - belt from blower pulley and motor
pulley.
7. Remove four bolts, four flat washers, four lock
washers and four nuts attaching the motor mounting
plate to the unit. Discard all lock washers.
8. Remove motor and motor mounting plate from unit.
9. Remove four bolts, four flat washers, four lock
washers and one
C11530
attaching motor to the motor mounting plate. Discard
all lock washers and external- - tooth lock washer.
10. Lift motor from motor mounting plate and set aside.
11. Slide motor mounting band from old motor.
12. Slide motor mounting band onto new motor and set
motor onto the motor mounting plate.
8
wiring and troubleshooting

BLOWER PULLEY
V-BELT
MOTOR
PULLEY
MOTOR
MOTOR MOUNTING
PLATE
C11504
external- - tooth lock washer
12