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• With wrap (cutoff) screws removed, cut off end of blower wrap will spring up. Lifting
wrap blower wheel is removed through the discharge opening in the blower housing.
• To replace, make sure wheel is oriented properly with hub to the opposite side from
the motor. Lift blower wrap and insert blower wheel through discharge opening in the
blower housing.
• Hold blower wrap down into position and replace two screws holding blower wrap to
blower sides.
• See motor replacement and blower assembly instructions for remaining assembly
procedure.
14.0 REPLACEMENT PARTS
Any replacement part used to replace parts originally supplied on equipment must be
the same as or an approved alternate to the original part supplied. The manufacturer will
not be responsible for replacement parts not designed to physically fit or operate within
the design parameters the original parts were selected for.
These parts include but are not limited to: Circuit breakers, heater controls, heater limit
controls, heater elements, motor, motor capacitor, blower relay, control transformer,
blower wheel, filter, indoor coil and sheet metal parts.
When ordering replacement parts, it is necessary to order by part number and include
with the order the complete model number and serial number from the unit data plate.
(See parts list for unit component part numbers).
15.0 ACCESSORIES - KITS - PARTS
• Combustible Floor Base RXHB-17, RXHB-21, RXHB-24 (for standard units) for
downflow applications, see section of this manual covering combustible floor base.
Model Cabinet Size
• Jumper Bar Kit 3 Ckt. to 1 Ckt. RXBJ-A31 is used to convert single phase multiple
three circuit units to a single supply circuit. Kit includes cover and screw for line side
terminals.
• Jumper Bar Kit 2 Ckt. to 1 Ckt. RXBJ-A21 is used to convert single phase multiple
two circuit units to a single supply circuit. Kit includes cover and screw for line side
terminals.
NOTE: No jumper bar kit is available to convert three phase multiple two circuit units
to a single supply circuit.
• External Filter Base RXHF- (See Figure 21)
Model Cabinet Size
Filter Size
17
16 x 20 [406 x 508] RXHF-17
21
20 x 20 [508 x 508] RXHF-21
24
25 x 20 [635 x 508] RXHF-24
• Supply and Return Air Temperature Sensor Kit. RXHT-A01 is used to display sup-
ply and return air temperature measurements when using the air handler with a serial
communicating thermostat.
Combustible Floor
Base Model Number
21
RXHB-21
24
RXHB-24
Part Number
Accommodate
1" or 2"
filter
A
B
15.70
17.50
19.20
21.00
22.70
25.50
35
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