Reznor AHDA User manual

Brand: Reznor

Model: AHDA

Type: 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)

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.

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

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.

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

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.

Reznor AHDA User manual

Reznor AHDA User manual

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