White Rodgers 50A55-843 - Manual

FIRE HAZARD

• Do not exceed the specified voltage.
• Protect the control from direct contact with water

(dripping, spraying, rain, etc.).

• If the control has been in direct contact with water,

replace the control.

• Label all wires before disconnection when servic-

ing controls. Wiring errors can cause improper
and dangerous operation.

• Route and secure wiring away from flame.

SHOCK HAZARD

• Disconnect electric power before servicing .
• Ensure proper earth grounding of appliance.
• Ensure proper connection of line neutral and line

hot wires.

EXPLOSION HAZARD

• Shut off main gas to appliance until installation is

complete.

50A55-843

Universal Integrated Furnace Control

FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL
INJURY AND/OR PROPERTY DAMAGE.

DESCRIPTION

Operator: Save these instructions for future use!

INSTALLATION INSTRUCTIONS

The 50A55-843 is an automatic gas interrupted ignition control
that employs a microprocessor to continually monitor, analyze,
and control the proper operation of the gas burner, inducer, and
fan.

Signals interpreted during continual surveillance of the thermo-
stat and flame sensing element initiate automatic ignition of the
burner, sensing of the flame, and system shut-off during normal
operation.

PRECAUTIONS

PART NO. 37-6265G

Replaces 37-6265F

0526

Installation should be done by a qualified heating and air
conditioning contractor or licensed electrician.

If in doubt about whether your wiring is millivolt, line, or low
voltage, have it inspected by a qualified heating and air condi-
tioning contractor or licensed electrician.

Do not exceed the specification ratings.

All wiring must conform to local and national electrical codes and
ordinances.

This control is a precision instrument, and should be handled
carefully. Rough handling or distorting components could cause
the control to malfunction.

Following installation or replacement, follow manufacturer’s
recommended installation/service instructions to ensure proper
operation.

CONTENTS

Description ........................................................ 1
Precautions ....................................................... 1
Specifications .................................................... 2
Installation ......................................................... 3

Mounting & Wiring

Operation .......................................................... 6
Mounting Hole Template .................................... 8

These controls incorporate system fault analysis for quick gas
flow shut-off, coupled with automatic ignition retry upon sensing
a fault correction.

WARNING

Failure to comply with the following
warnings could result in personal injury
or property damage.

CAUTION

Do not short out terminals on gas valve or primary
control. Short or incorrect wiring may damage the
thermostat.

White-Rodgers is a division

of Emerson Electric Co.

www.white-rodgers.com

TRANE APPLICATION - Installer MUST read page 3 “Mounting and Wiring”