White Rodgers 50M56U-843 installation instructions Installation Instructions, Description

50M56U-843

Universal Single Stage

HSI Integrated Furnace Control Kit

INSTALLATION INSTRUCTIONS

INSTALLER MUST READ

PAGE 3 CONTAINS WIRING HARNESS AND BLOWER CONNECTION INSTRUCTIONS FOR ALL APPLICATIONS AND IMPORTANT OEM REPLACEMENT INSTRUCTION FOR:

●TRANE / AMERICAN STANDARD

●RHEEM / RUUD

●BRYANT / CARRIER / DAY & NIGHT / PAYNE

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

DESCRIPTION

The 50M56U-843 kit is a Universal Single Stage HSI Integrated Furnace Control that employs a microprocessor to continually monitor, analyze, and control the proper operation of the gas burner, inducer, and fan.

The kit contains:
• 50M56-843 Ignition Control Module		21D64-2
•	21D64-2 Ignitor Kit
•	Set of Interconnect Harnesses	50M56-843

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 conditioning 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	2
Mounting & Wiring
Operation	6
Troubleshooting	8

PRECAUTIONS

!WARNING

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

FIRE HAZARD

•Do not exceed the specified voltage.

•Replace existing control with exact model and dash number.

•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 servicing 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.

www.white-rodgers.com	PART NO. 37-7042C
	Replaces 37-7042B
www.emersonclimate.com	1103