White Rodgers 50A55-843 installation instructions Installation Instructions, Description

50A55-843

Universal Integrated Furnace Control

INSTALLATION INSTRUCTIONS

Operator: Save these instructions for future use!

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

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.

DESCRIPTION

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

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

PRECAUTIONS

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.

CAUTION

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

CONTENTS
Description	1
Precautions	1
Specifications	2
Installation	3
Mounting & Wiring
Operation	6
Mounting Hole Template	8

WARNING

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

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.

White-Rodgers is a division	PART NO. 37-6265G
of Emerson Electric Co.	Replaces 37-6265F
www.white-rodgers.com	0526