7
4
8
H
C
D
D
2
4
A
2
A
6
-
0
A
0
G
0
Product Type
Product Series
Cooling Tons
1
Example:
Position:
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16
17 18
Refrig. Systems Options
Heat Options
Sensor Options
Indoor Fan Options
Coil Options (RTPF) (Outdoor - Indoor - Hail Guard)
Voltage
Design Revision
Base Unit Controls
Intake / Exhaust Options
Service Options
Factory Assigned
Electrical Options
A = None
C = Non-Fused Disconnect
D = Thru-The-Base Connections
F = Non-Fused Disconnect and
Thru-The-Base
Connections
G = Two-Speed Blower
J = Non-Fused Disconnect and
Two-Speed
Blower
K = Through the basepan electrical
and Two-Speed Blower
M = non-Fused Disconnect and
Through the basepan electrical
and Two-Speed Blower
Enter Unit’s
Model Number:
THIS UNIT’S MODEL NUMBER
C12090A
Fig. 10
−
Model Number Nomenclature Example, 48TC Series
Replacing the Motor
1.
Turn off all electrical power to the unit. Use approved
lockout/tagout procedures on all electrical power
sources.
2.
Remove the cover on the 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 the two jack bolts counterclockwise until the
motor assembly moves closer to the blower pulley.
6.
Remove the V-belt from the 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 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.
CAUTION
!
7.
Loosen the four mounting bracket bolts and lock
washers.
8.
Remove four bolts, four flat washers, four lock wash
ers and four nuts attaching the motor mounting plate
to the unit. Discard all lock washers.
9.
Remove the motor and motor mounting bracket from
the unit.
10.
Remove four bolts, flat washers, lock washers and
single external-tooth lock washer attaching the motor
to the motor mounting plate. Discard all lock washers
and external-tooth lock washer.
11.
Lift the motor from the motor mounting plate and set
aside.
12.
Slide the motor mounting band from the old motor.
13.
Slide the motor mounting band onto the new motor
and set the motor onto the motor mounting plate.
14.
Remove the variable pitch pulley from the old motor
and attach it to the new motor.
15.
Inspect the variable pitch pulley for cracks and wear.
Replace the pulley if necessary.
16.
Secure the pulley to the motor by tightening the pul
ley setscrew to the motor shaft.
17.
Insert four bolts and flat washers through the mount
ing holes on the motor and 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.
Make sure the teeth of the external-tooth lock washer
make contact with the painted base of the motor.
This
washer is essential
for properly grounding the motor.
20.
Install four new lock washers and four nuts on the
bolts on the bottom of the motor mounting plate, but
do not
tighten the mounting bolts at this time.
21.
Set the new motor and motor mounting bracket back
onto the unit. See Fig. 10.
22.
Install four bolts, four flat washers, four new lock
washers and four nuts attaching the motor assembly
to the unit, but
do not
tighten the mounting bolts at
this time.
23.
Install the motor drive V-belt to the motor pulley and
blowerwheel pulley. See CAUTION.
24.
Align the motor pulley and blower wheel pulley using
a straight edge. See Fig. 6.
Summary of Contents for 48TC 17 Series
Page 39: ...39 C10818 Fig 45 RTU OPEN Control Module ...
Page 83: ...83 APPENDIX IV WIRING DIAGRAMS cont C12616 Fig 74 48TC D17 D28 Power Diagram 208 230 3 60 ...
Page 84: ...84 APPENDIX IV WIRING DIAGRAMS cont C12266 Fig 75 48TC D17 D28 Power Diagram 460 3 60 ...
Page 85: ...85 APPENDIX IV WIRING DIAGRAMS cont C12618 Fig 76 48TC D17 D28 Power Diagram 575 3 60 ...
Page 92: ...92 APPENDIX IV WIRING DIAGRAMS cont C13767 Fig 83 RTU OPEN Wiring Diagram ...
Page 93: ...93 APPENDIX IV WIRING DIAGRAMS cont C13768 Fig 84 RTU OPEN Wiring Diagram with Humidi MiZer ...