Operator's Manual: Models CB-3500 & CB-5000
3-4
Installing the Blower Components
NOTE:
The blower is installed in final position on the CB-3500 cabinet. The blower for the CB-5000
requires additional installation as described in the following procedure.
Installing the Blower (Model CB-5000 ONLY)
NOTE:
For proper air flow through the furnace, the blower must be positioned so the bulge on the blower faces
toward the rear of the furnace as illustrated in Figures 3A, 3B, and 3D.
1.
Remove the hex-head screws, which hold the blower in the shipping position.
2.
Carefully slide the blower rearward on the cabinet into position against the blower inlet lip.
3.
Use self-tapping screws to install the angle support at the back of the blower to complete the
blower inlet lip.
4.
Install at least three (3) self-tapping screws to each side of the blower inlet to safely support the
blower.
Installing the Motor on the Blower
1.
Refer to Figures 3C and 3D.
2.
Use self-tapping bolts to install the motor mounting bracket on the blower according to the
dimensions provided in Figure 3C.
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 3C.
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 lower holes in the motor mounting plate
and motor. Tighten the nuts to hold the motor firmly in position.
Wiring the Blower Motor
WARNING:
To avoid electrical shock, make sure the main power to the furnace is turned OFF
before wiring the blower motor.
1.
Refer to the Furnace Wiring Diagram provided in Appendix B at the back of this manual.
2.
Install the electrical cable between the electrical junction box on the front of the furnace and the
electrical access on the blower motor.
3.
Connect the wires in the junction box according to the Furnace Wiring Diagram (Appendix B).
NOTE:
The blower motor is rated for 208-230 volts, single phase. Make sure the proper electrical circuit to the
furnace has been provided by a qualified electrician as shown in the Furnace Wiring Diagram.
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