Mr. Heater MHU 50 User Manual

WARNING:
Improper installation, adjustment, alteration, service or maintenance
can cause injury or property damage. Refer to this manual. For assistance or
additional information consult a qualified installer, service agency or the gas supplier.
— WHAT TO DO IF YOU SMELL GAS
 •
DO NOT try to light any appliance.
 •
DO NOT touch any electrical switch; do not use any phone in your building.
 •
Leave the building immediately
•
Immediately call your gas supplier from a phone remote from the building. Follow the
gas suppliers instructions.
 •
If you cannot reach your gas supplier, call the Fire Department.
-- Installation and service must be performed by a qualified installer, service agency or the
gas supplier.
FOR YOUR SAFETY:
Do not store or use gasoline or other flammable vapors and liquids in the vicin-
ity of this or any other appliance.
WARNING: If the information in these instructions are not followed exactly, a fire or
explosion may result causing property damage, personal injury or loss of life.
20176 0185
OPERATINGINSTRUCTIONSANDOWNER’SMANUAL
READ INSTRUCTIONS CAREFULLY:Readandfollowallinstructions.Placeinstructionsinasafe
placeforfuturereference.Donotallowanyonewhohasnotreadtheseinstructionstoassemble,
light,adjustoroperatetheheater.
Model#
www.mrheater.com •800-251-0001
COMPACT UNIT HEATER
FOR RESIDENTIAL/COMMERCIAL USE
MHU50
MHU80
MHU125
®

Mr. Heater MHU 50 Specifications

General

Brand	Mr. Heater
Model	MHU 50
Category	Heater
Language	English

Summary

Unit Overview and Specifications

Unit Dimensions

Physical dimensions and mounting specifications of the unit.

Start-Up and Performance Checklist

A checklist for initial unit setup and performance verification.

Installation Requirements

Shipping and Handling

Information regarding the unit's shipment and damage inspection.

CSA Installation Standards

Safety and installation standards for USA and Canada.

Specialized Location Installations

Requirements for garages and aircraft hangars.

Installation Procedures

Unit Heater Installation

Step-by-step guide for mounting and installing the unit.

Combustion and Ventilation Air

Requirements for adequate air supply for combustion and ventilation.

Venting Guidelines

Comprehensive guidelines for venting the unit, including types and clearances.

Electrical Connections

Procedures for connecting the unit's electrical power.

Gas Connection and Leak Check

Guidelines for connecting gas supply and checking for leaks.

Operation and Safety

Unit Start-Up Procedures

Step-by-step guide for initial unit start-up procedures.

Ignition Control and Indicators

Explanation of ignition sequence, LED indicators, and controls.

Safety Features and Adjustments

Information on safety switches, louvers, and high altitude operation.

Maintenance and Troubleshooting

Gas System Maintenance

Procedures for checking gas flow, pressure, and burners.

Flue, Blower, and Electrical Checks

Maintenance for flue, blower, and electrical systems.

Troubleshooting Common Issues

Steps to diagnose and resolve common operational issues.

Wiring Diagrams

Electrical schematic and control circuit ladder diagram.

Fuel Conversion Process

Instructions and kits for converting the unit between fuel types.

Parts and Service

Repair Parts Identification

Illustrated diagram of unit components for identification.

Parts List and Ordering

Detailed list of parts and information on how to order them.

Service, Warranty, and Registration

Contact details for service, warranty claims, and product registration.