Heat Controller MGD90-E5B User Manual

INSTALLATION
INSTRUCTIONS
Manufactured Home
Downow Gas Furnace:
MGD-B Series
Heat Controller, Inc. • 1900 Wellworth Ave. • Jackson, MI 49203 • (517)787-2100 • www.heatcontroller.com

Heat Controller MGD90-E5B Specifications

General

Brand	Heat Controller
Model	MGD90-E5B
Category	Furnace
Language	English

Summary

CAUTION

INSTALLATION STANDARDS

CODE COMPLIANCE

Details adherence to federal, national, and local codes for proper and safe furnace installation.

HIGH ALTITUDE INSTALLATION

INSTALLATION CLEARANCES

Specifies minimum clearances from combustible materials for various installation types like alcove or closet.

WARNING: HAZARD OF ASPHYXIATION

INSTALL FURNACE

RJ - SERIES ROOF JACK

Explains the mandatory use of the RJ-Series Roof Jack for sealed combustion furnaces and venting.

CONNECT POWER SUPPLY

WALL THERMOSTATE

CONNECT THERMOSTAT WIRES

GAS PIPING

GAS VALVE CONVERSION INSTRUCTIONS

HIGH ALTITUDE DERATE CHART – MAIN BURNER ORIFICE SIZE

HIGH ALTITUDE ORIFICE CONVERSION KITS

IF FURNACE FAILS TO OPERATE PROPERLY:

WIRING DIAGRAM, MGD-B

CONNECTION DIAGRAM

Diagram showing the overall electrical connections and component layout for the furnace's power supply.

LADDER DIAGRAM

Schematic diagram illustrating the furnace's electrical control sequence and component interconnections.

WIRE COLOR KEY

FLASH CODES

Explains the meaning of different flash codes from the control board for diagnosing furnace operational issues.

COROLA BOARD WIRING DIAGRAM