Reznor SC Series User Manual (English)

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Form CP-OPT-GMK (6-16), P/N 208831 R3, Page 1

Instructions for Installing Replacement Gear Motor Kit

Applies: Modulating Gas Control Options AG39, AG40, AG41 & AG42

on Model Series SC & Model Series RP

Form CP-OPT-GMK (6-16)

Gear Motor Replacement Kit includes a new factory-assembled ue

duct and combustion air damper with a factory-wired gear motor

installed plus three new replacement gaskets

Sizes 100, 125,

150, 175, 200,

225,250, 300

Size 400

Kit P/N 208474 208475

Components: Qty P/N P/N

Factory-assembled and Wire Flue Duct and Combustion Air

Damper Assembly with Gear Motor (See FIGURE 1)

1 207975 207976

Cover Plate Gasket 1 41996

Venter Seal Gasket 1 44695

Flue Outlet Duct Gasket 1 31900

Obsoletes RZ-NA CP-OPT-GMK (Version A)

This kit is designed to replace the solenoid actuator with a gear motor on heaters

equipped with a modulating gas control Option AG39, AG40, AG41 or AG42. To

facilitate replacement, the new ue duct, combustion air damper and gear motor is

factory-assembled and wired for change out.

Application /

Components

FIGURE 1

Gear Motor Replacement Kit includes Factory-Assembled & Wired Flue Duct & Combustion Air Damper

Assembly with Gear Motor, P/N 207975 or P/N 207976 & three Replacement Gaskets.

Flue Outlet Duct Gasket, P/N 31900

Use when attaching the new flue duct

assembly to the collection box.

(NOTE: Be sure to reuse the restrictor plate.)

Venter Seal Gasket

P/N 44695

Use when

re-installing

venter

housing on

side of flue

duct

Cover Plate

Gasket

P/N 41996

Use when

reattaching cover

plate

Time Delay Relay

P/N 206146

with brown wire attached to

Terminal 7 in the heater control

compartment

15 MFD

Capacitor

P/N 206145

Terminal Block

Connections 85, 86

and 87

Gear Motor

P/N 206144

with damper

linkage

Black wire from the NO

terminal on lower end-switch

attaches to Terminal 88 in the

heater control compartment

Lower End

Switch

Purple wire from the NO

terminal on upper

end-switch attaches to

Terminal 88 in the heater

control compartment

Upper End Switch

Flue Duct with

Combustion Air

Damper

Warning: This replacement kit is to be installed by a qualied agency in accordance

with these instructions and in compliance with all codes and requirements of

authorities having jurisdiction. Failure to follow instructions could result in death,

serious injury and / or property damage. The qualied agency performing this work

assumes responsibility for this installation.

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Reznor SC Series Specifications

General

Model	SC Series
Fuel Type	Natural Gas or Propane
Ignition	Direct Spark Ignition
Heat Exchanger Material	Aluminized Steel
Heating Capacity	30, 000 to 400, 000 BTU/hr
Efficiency	Up to 82% Thermal Efficiency
Thermostat Compatibility	24V Thermostat
Construction	Heavy-duty steel cabinet