Reznor CAUA User manual

Revision: OPT-DAMPER-MTR (03-22) 209422-A
DAMPER MOTOR REPLACEMENT KIT INSTALLATION
Supersedes: CP-DMPR-MTR (05-15) PN209422R5
MODELS AHCA, AHDA, CAUA (WITH MIXING BOX), PCCA, PCDA, RBA, RBL, RGB,
RGBL, RPB, RPBL, SCE, SSCBL, AND XE WITH DISCONTINUED DAMPER MOTORS
Table 1. Inlet Air Option
Model Inlet Air Option
AHCA, AHDA, PCCA, PCDA AR8, AR58, or AR61
CAUA with mixing box GB2 or GB30
RBA, RBL, RGB, RGBL, RPB, RPBL, SCE, SSCBL, XE AR7, AR8, AR14, or AR17
•Refer to the installation manual provided with the unit for important safety information.
•These instructions are for replacing the following discontinued damper motors: model #WR3405-21 (PN 66276),
model #WR3402-9 (PN 97385), and model J/C #M9206-BGB-2S (earlier version of PN 209321).
•Damper motor replacement kit PN 209423 is used on the the Reznor® models listed in Table 1. Check the wiring
diagram provided with the unit to determine the inlet air option installed.
Figure 1. Replacement Kit Components
COMPONENTS
Ensure that all components listed in Table 2 are available before beginning installation.
NOTE: Use of parts depends on model of heater being serviced. There may be unused parts.
Table 2. Damper Motor Replacement Kit (PN 209423) Components
Model Item No. Component Description PN (Quantity)
All
1 Damper motor #J/C M9208-BG3-3, see Figure 1 209351 (1)
2 Motor mounting kit #J/C M9208-100, see Figure 1 209352 (1)
2A Bracket Mounting — (1)
2B Screws Self-drilling — (4)
2C Capscrew M5 × 0.8 — (3)
2D Hex nut insert Nylon — (3)
2E Washer Large — (1)
2F Crankarm — — (1)
2G Ball joint — — (1)
3 Wire nut Twist-on 16354 (5)
All except CAUA
4 Motor support With weld nuts 100315 (1)
5Slotted head screw 1/4-20 × 1-1/2 100763 (2)
6 #10 × 3/4 20859 (2)
7 Bolt 1/4-20 × 3/4 16246 (4)
8 Extension Extension 123642 (1)
CAUA 9 Screw 1/4-20 × 3/4 114687 (4)
Item 1: Damper Motor Item 2: Motor
Mounting Kit

2OPT-DAMPER-MTR (03-22) 209422-A
INSTALLATION
⚠ DANGER ⚠
Improper installation, adjustment, alteration, service, or maintenance can cause property damage,
injury, or death. Read these instructions thoroughly before installing or servicing this equipment.
The qualified agency performing this work assumes responsibility for this installation.
Install the damper motor replacement kit as follows. Item numbers in parentheses refer to Table 2.
1. Turn OFF gas and electric power.
2. Remove existing damper motor:
a. Remove damper motor and linkage access panel.
b. At damper motor, disconnect linkage from damper arm and close dampers.
c. Mark and disconnect wiring from motor.
d. Remove motor with existing mounting bracket.
(1) For model CAUA, do not remove existing motor support or any other damper linkage.
(2) For all models except CAUA, remove existing motor support and keep all linkage.
3. For all models except CAUA, install replacement motor support (4) in same location using screws (5 and 6) as
shown in Figure 2.
5
6
5
6
4
Figure 2. Replacement Motor Support
4. Install mounting bracket (2A):
a. For model CAUA:
(1) Position mounting bracket (2A) in orientation shown in Figure 3, DETAIL A and align holes on right side
with existing holes.
(2) Mark and drill two 13/64-inch holes on left side.
(3) Secure mounting bracket (2A) using four screws (9).
b. For all models except CAUA:
(1) Position mounting bracket (2A) in orientation shown in Figure 3, DETAIL B on motor support installed in
step 3 with left side of bracket extended slightly over outer side of motor support.
(2) Align mounting bracket (2A) holes with motor support weld nuts and secure bracket using four bolts (7).
DETAIL A DETAIL B
Figure 3. Replacement Mounting Bracket

3
OPT-DAMPER-MTR (03-22) 209422-A
5. Install damper motor (1):
a. With side of damper motor (1) marked B for model CAUA (see Figure 4, DETAIL A) or A for all models except
CAUA (see Figure 4, DETAIL B) facing out, slide motor into mounting bracket installed in step 4.
b. Align damper motor (1) holes with mounting bracket holes indicated in Figure 3 (DETAIL A for model CAUA
or DETAIL B for all models except CAUA) and install two capscrews (2C) through bracket and motor.
c. Install two hex nut inserts (2D) on capscrews (2C) and torque nuts to 15–20 inch-pounds (1.7–2.3 newton-
meters).
Figure 4. Replacement Damper Motor
6. For model CAUA, install crankarm (2F) on damper motor installed in step 5 as follows:
a. On side of motor marked A, secure crankarm (2F) to motor using capscrew (2C).
b. On side of motor marked B, install washer (2E) and hex nut insert (2D) on capscrew (2C) and torque nut to
15–20 inch-pounds (1.7–2.3 newton-meters).
7. Connect damper motor wiring using wire nuts (3):
NOTE: The replacement damper motor wires are two colors: yellow or black and white or red.
a. Connect yellow or black wire to wire marked D (was connected to D terminal on original motor).
b. Connect white or red wire to wire marked T (was connected to T terminal on original motor).
c. For all models except CAUA, if end switch is not used, proceed to step d. If end switch is used, proceed as
follows:
(1) Connect white/blue or black/blue wire to wire marked NC (was connected to NC terminal on original motor).
(2) Connect white/gray or black/gray wire to wire marked NO (was connected to NO terminal on original motor).
(3) Connect white/yellow or black/red wire to wire marked COM (was connected to COM terminal on original
motor).
d. Install wire nut (3) on other three motor wires: white/blue or black/blue, white/gray or black/gray, and white/
yellow or black/red.
8. Reconnect damper linkage:
a. For model CAUA, reconnect linkage to shaft on damper motor as shown in Figure 5.
DETAIL A DETAIL B
Figure 5. Model CAUA Damper Motor and Linkage Inside Mixing Box

Specifications and illustrations subject to change without notice or incurring obligations.
Latest version of this manual is available at www.reznorhvac.com.
©2022 Nortek Global HVAC LLC, O’Fallon, MO. All rights reserved.
OPT-DAMPER-MTR (03-22) 209422-A
INSTALLATION—CONTINUED
b. For all models except CAUA, insert shaft through damper motor on side of motor marked B, secure shaft with
coupler, and reconnect linkage to shaft (see Figure 6).
Figure 6. Damper Linkage for All Models Except CAUA
9. Turn ON electric power and gas.
10. Cycle unit and check for proper operation.
NOTE: The end switch is factory-set to activate the blower motor when the arm reaches the
20-degree position. The switch is adjustable from 10–90 degrees using an adjustment screw on
either side of the damper motor.
11. Verify that damper is 80% open before blower motor activates. If not, adjust end switch as necessary using
adjustment screw on damper motor to achieve 80% open damper before blower motor activates. Refer to damper
motor manufacturer’s instructions.
12. When system is operating correctly, install damper motor and linkage access panel.
18" LONG
DAMPER ROD
P/N 11560
BALL JOINT
TO INSIDE
SET AT 40° -
P/N 12636
DAMPER MOTOR
#M9208-BG3-3
P/N 209351
DAMPER ARM
P/N 12635
SET ARM AT
1 O'CLOCK
BALL JOINT TO INSIDE
SET AT TIP - P/N 12636
BRACKET FROM
MOUNTING KIT
P/N 209352
DAMPER ARM P/N 12635
SET ARM AT 1 O'CLOCK
Options AR7
and AR8 (AJ2)
18" LONG
DAMPER ROD
P/N 11560
BALL JOINT
TO INSIDE
SET AT 40° -
P/N 12636
DAMPER
MOTOR
#M9208-BG3-3
P/N 209351
DAMPER ARM P/N 12635
SET ARM AT 11 O'CLOCK
BALL JOINT TO INSIDE
SET AT TIP - P/N 12636
DAMPER ARM P/N 12635
SET ARM AT 11 O'CLOCK
OUTSIDE AIR
CLOSED
OUTSIDE AIR
CLOSED
SET ON
MIDDLE
PIN OF 3
BLADE DAMPER
SHAFT
P/N 123642 SHAFT P/N 123642
SET ON MIDDLE PIN
OF 3 BLADE DAMPER
BRACKET FROM
MOUNTING KIT
P/N 209352
Options AR7
and AR8 (AJ1)
DAMPER ARM
P/N 12635
SET ARM AT
11 O'CLOCK
BALL JOINT
TO OUTSIDE
SET AT 50° -
P/N 12636
BALL JOINT
TO OUTSIDE
P/N 12636
DAMPER ARM ADJUSTMENT
PLATE P/N 115687
SEE DETAIL A
MOTOR ARM P/N 12365
SET ARM AT 11 O'CLOCK
DAMPER ARM P/N 12635
SET ARM AT 1 O'CLOCK
13" LONG DAMPER ROD
EVEN WITH BALL JOINT
BOTH ENDS
P/N 112554
17" LONG
DAMPER ROD
P/N 112556
Option AR17 (AJ2)
DAMPER ARM
P/N 12635
SET ARM AT
11 O'CLOCK
BALL JOINT
TO OUTSIDE
SET AT 50° -
P/N 12636
BALL JOINT
TO OUTSIDE
P/N 12636
DAMPER ARM
ADJUSTMENT
PLATE P/N 115687
MOTOR ARM
P/N 12636
SET ARM AT
11 O'CLOCK
DAMPER ARM
P/N 12635
SET ARM AT
1 O'CLOCK
13" LONG DAMPER ROD
EVEN WITH BALL
JOINT BOTH ENDS
P/N 112554
18" LONG DAMPER ROD
P/N 11560
BALL JOINT TO INSIDE
SET AT 45° - P/N 12636
BALL JOINT TO INSIDE
P/N 12636
BALL JOINT
TO INSIDE
SET AT 45° -
P/N 12636
BALL JOINT
TO INSIDE
P/N 12636
DAMPER MOTOR
#M9208-BG3-3
P/N 209351
DAMPER
MOTOR
#M9208-BG3-3
P/N 209351
BRACKET FROM
MOUNTING KIT
P/N 209352
OUTSIDE AIR CLOSED
OUTSIDE AIR CLOSED
SET ON MIDDLE PIN
OF 3 BLADE DAMPER
SHAFTP/N 123642
SHAFT
P/N 123642
SET ON MIDDLE PIN
OF 3 BLADE DAMPER
DETAIL A
BOLT DAMPER ARM
ADJUSTMENT PLATE TO
MOTOR ARM USING -
BOLT P/N 10393 (2)
& NUT P/N 7328 (2)
Option AR17 (AJ1)
BRACKET FROM
MOUNTING KIT
P/N 209352
NOTE: DAMPER MOTOR
AND MOUNTING
BRACKET ARE FROM
REPLACEMENT KIT.
OTHER PARTS SHOWN
ARE EXISTING PARTS
ON UNIT.