EasyManua.ls Logo

Intertherm M1B Series - User Manual

Intertherm M1B Series
36 pages
Print Icon
To Next Page IconTo Next Page
To Next Page IconTo Next Page
Loading...
M1B, M1M & M5S Series
Downflow, Direct Vent (Sealed Combustion)
Forced Air Gas & Oil Furnaces
For installation in:


Buildings




    

damage.



       









instructions.







      


       




     






incendies.


Table of Contents

Question and Answer IconNeed help?

Do you have a question about the Intertherm M1B Series and is the answer not in the manual?

Summary

Installation Instructions

Safety Warnings and Gas Leak Procedures

Crucial safety warnings for fire, explosion, and gas leaks.

Safety Information and Codes

Important Safety Warnings

Designates hazards, potential injury, or death if warnings are ignored.

Installation Requirements and Codes

Compliance with local building codes and national fuel gas standards.

General Information

Manufacturer Warranty

Details owner's responsibilities regarding furnace setup and maintenance.

Minimum Clearances

Specifies required distances from combustible materials for safe installation.

Unit Location Requirements

Guidelines for placing the furnace for optimal operation and access.

Circulating Air Requirements

Return Air Connections

Proper setup for return air to prevent hazards and ensure airflow.

Supply Air Connections

Guidelines for designing supply duct systems for effective air distribution.

Furnace Installation Procedures

Locating and Cutting Duct Openings

Precise steps for creating floor openings for duct connectors and gas lines.

Standard Duct Connector Installation

Method for installing standard duct connectors for supply air.

Furnace Installation (Continued)

Round Duct Connector Installation

Procedure for installing round duct connectors, including alternate methods.

Installing the Furnace

Steps for placing and securing the furnace unit into its designated location.

Roof Jack Installation

Roof Jack Selection

How to choose the correct roof jack based on ceiling cavity and roof slope.

Application Notes for Roof Jacks

Specific notes on using different roof jack types and extensions.

Roof Jack Installation (Continued)

Locating and Cutting Roof;Ceiling Openings

Steps for precise placement and cutting of openings for the roof jack.

Installing the Roof Jack

Detailed procedure for mounting the roof jack assembly and ensuring a watertight seal.

Roof Jack Installation (Continued)

Transit-Mode Venting System Installation

Specific instructions for installing venting systems in manufactured homes.

Electrical Information

Line Voltage Wiring

Guidelines and warnings for connecting the furnace to the main power supply.

Connecting Power Supply Wires

Step-by-step instructions for making line voltage electrical connections.

Electrical Information (Continued)

Low Voltage Wiring

Procedures for connecting the thermostat and low-voltage control circuits.

Verifying Anticipator Setting

How to check and adjust the thermostat's heat anticipator setting.

Grounding Requirements

Critical information on grounding the furnace for electrical safety.

Fuel Supply and Piping

Gas Piping Safety and Testing

Warnings and procedures for safe gas piping installation and leak testing.

Important Notes on Gas Piping

Key considerations for gas piping placement, materials, and shut-off valves.

Fuel Supply and Piping (Continued)

Leak Check Procedures

How to perform leak checks on all gas connections using a soap solution.

Oil Tank and Piping Installation

Recommended practices for installing oil tanks and associated piping systems.

Fuel Supply and Piping (Continued)

Fuel Line Hook-Up and Systems

Instructions for connecting single-line and two-line oil systems, including bleeding.

Fuel Line Bleeding

Procedure to remove air from the oil supply line for proper burner operation.

Fuel Supply and Piping (Continued)

Furnace Priming and LP Conversion

Steps for priming oil burners and converting the furnace for propane gas.

High Altitude Conversion

Startup and Adjustments

Pre-Lighting Safety Checks

Essential safety precautions and checks before initial furnace lighting.

Startup Procedures Overview

Guidelines for the first lighting and operation of the furnace.

Startup and Adjustments (Continued)

M1 M Direct Ignition Furnace Operation

Instructions for starting and operating direct ignition furnaces.

M1 B Gas Gun Furnace Operation

Steps for starting and operating gas gun furnaces.

Startup and Adjustments (Continued)

Burner Adjustments and Gas Pressure

Procedures for checking and adjusting burner settings and gas pressure.

Verifying Temperature Rise

How to measure and ensure proper temperature rise for efficient operation.

Combustion Air Requirements

Importance of adequate combustion air for safe and efficient furnace operation.

Startup and Adjustments (Continued)

Oil Gun Furnace Operation (M5 S Models)

Operating instructions for oil gun furnaces with Honeywell or Beckett controls.

Electrode Setting and Ignition Control

Details on oil gun electrode adjustment and switching ignition controls.

Furnace Controls and Functions

Furnace On;Off Switch and Limit Controls

Explains the furnace power switch and high-temperature safety limit switches.

Blower Off Delay Function

Describes the delay feature for the blower fan after cooling mode is satisfied.

Troubleshooting Common Issues

Ignitor and Gas Flow Problems

Diagnosing issues with ignitors, gas valves, and lack of gas flow.

Burner and Motor Operation Issues

Troubleshooting burner motor not running, no flame, or insufficient heat.

Circulation Blower Malfunctions

Steps to diagnose why the circulation blower isn't operating correctly.

Troubleshooting (Continued)

Oil Gun Control Status and Lockouts

Interpreting LED indicators and resetting controls for oil furnaces.

Burner Lockout and Cad Cell Issues

Diagnosing burner lockouts, cad cell resistance, and flame sensing problems.

Troubleshooting (Continued)

Control Module Status Indicators

Explains status codes indicated by LEDs on control modules for different furnace series.

Optional Accessories for Air Conditioning

Maintenance and Service

Homeowner Maintenance Tasks

Routine cleaning and checks for homeowners to ensure furnace efficiency.

Installer Service Recommendations

Periodic service tasks for qualified technicians to maintain furnace performance.

Additional Oil Furnace Maintenance

Specific maintenance procedures for oil-fired furnaces, including nozzle and filter replacement.

Furnace Specifications and Data

M1;M5 Furnace Model Specifications

Table detailing model numbers, input/output, orifice sizes, and motor HP.

Furnace Specifications and Data (Continued)

High Altitude Orifice Size Equivalents

Table showing orifice size adjustments for installations at various altitudes.

A;C Blower Speed Selection Chart

Guide for selecting blower speeds when using add-on air conditioning.

Gas Information and Capacities

Gas Flow Rate Tables

Data on gas flow rates based on meter revolution time and cubic feet per hour.

Gas Pipe Capacity Charts

Tables detailing black iron gas pipe capacity based on size and length.

Wiring Diagrams - M1 M Models

M1 M Series Direct Ignition Furnace Wiring

Detailed wiring diagram for M1M series furnaces, including control and blower connections.

Control Module Status Indicators

Explains status codes indicated by LEDs on M1M series control modules.

Wiring Diagrams - M1 B & M5 S Series

M1 B & M5 S Series Furnace Wiring

Wiring diagram for M1B and M5S series gas and oil furnaces.

Installation and Performance Checklist

Electrical System Verification

Checklist items for verifying correct electrical connections and settings.

Gas System and Altitude Verification

Checklist items for gas type, pressure, pipe leaks, and altitude deration.

Combustion Air and Venting Checks

Checklist items for ensuring adequate air supply and proper venting.

Intertherm M1B Series Specifications

General IconGeneral
Input BTU40, 000 - 120, 000 BTU/h
Efficiency80% AFUE
Heat ExchangerAluminized Steel
Fuel TypeGas
Thermostat CompatibilityStandard
WarrantyLimited Lifetime Heat Exchanger

Related product manuals