Operator's Manual: Models CB-1750, CB-2500 & CB-3250
3-6
Installing the CB-3250 Blower Assembly
Mounting the CB-3250 Blower
1.
Refer to Figures 3F and 3G.
2.
Position the blower over the opening in the back of the furnace cabinet by sliding the blower into
the mounting angle brackets. The top of the blower is slid over the lip on the back of the furnace.
The mounting screws on top will go through the blower and anchor into the thicker lip pretruding
from the back of the furnace cabinet. Check for proper positioning by referring to Figure 3G.
3.
Fasten the blower to the brackets with self-tapping screws (provided).
NOTE:
There are three holes for fastening the blower along each side of the bracket, as well as
three across the top.
Installing the CB-3250 Motor on the Blower
1.
Refer to Figures 3F and 3G.
2.
Use self-tapping bolts to install the motor mounting bracket on the blower according to the
dimensions provided in Figure 3F.
3.
Slide the two (2) square-head bolts upside-down in the channel of the motor mounting bracket.
4.
Install the motor mounting plate on the mounting bracket using the two bolts in the channel to
hold the plate in position. DO NOT install the nuts on the bolts yet. Make sure the plate is flush
with the side of the blower.
5.
Use a self-tapping bolt to install the motor tensioning bracket on the blower according to the
dimensions provided in Figure 3F.
6.
Lift up on the end of the motor mounting plate until the hole in the side of the plate is aligned
with the slot in the motor tensioning bracket. Push a bolt through the slot and install a nut
loosely just to hold the plate in position. DO NOT tighten the nut yet.
7.
Lift the motor into position on the motor mounting plate using the two bolts in the channel to
hold the motor in place. Now loosely install the nuts on the two (2) bolts.
8.
Slide the motor into position so the face of the motor is flush with the side of the blower. Now
tighten the nuts.
9.
Install the additional two (2) bolts and nuts through the upper holes in the motor mounting plate
and motor. Tighten the nuts to hold the motor firmly in position.
Wiring the CB-3250 Blower Motor
WARNING:
Make sure the main power to the furnace is turned OFF before wiring the blower
motor.
NOTE:
Wiring schematics are provided in Figure H and Appendix B at the back of the manual.
1.
After the blower has been secured to the back of the furnace cabinet, screw the electrical conduit
with the blower motor leads into the motor housing.
2.
Determine the voltage being supplied to the unit. Follow the correct wiring diagram in Figure H
for either 115 Volts or 230 Volts. Connect the wire ends with the terminals to the motor. Refer to
the wiring diagram on the motor to ensure that the motor is wired for
proper voltage and CW
rotation facing the shaft.
3.
Install the electrical conduit with the blower motor leads into the 4" x 6" rear junction box on top
of the furnace cabinet as shown in Figure 3G. Refer to Figure 3H for the proper wiring diagram.
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Страница 8: ...TABLE OF CONTENTS APPENDIX C Furnace Service Record C 1 ...
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