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Heatmaster HM2-MIL User Manual

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WARNING: FAILURE TO FOLLOW THESE INSTRUCTIONS CAREFULLY AND WITHOUT
ERROR OR FAILURE TO HEED ANY AND ALL WARNINGS IN THESE INSTRUCTIONS CAN
RESULT IN AN EXPLOSION, FIRE OR THE PRODUCTION OF CARBON MONOXIDE GAS
WHICH CAN CAUSE PROPERTY DAMAGE, BODILY INJURY OR DEATH.
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of
this or any other appliance.
WHAT TO DO IF YOU SMELL GAS:
Do not try to light any appliance.
Do not touch any electrical switch.
Do not use any telephone in your building.
Immediately call your gas supplier from a neighbor’s telephone.
Follow the gas supplier’s 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.
This is an unvented gas-fired heater. It uses air (oxygen) from the room in which it is in-
stalled. Provisions for adequate combustion and ventilation air must be provided. Refer to
page 4.
This appliance is intended for supplemental heating.
ANSI Z21.11 2-2016 APPROVED / ANSI Z21.60-2017 CSA 2.26 2017
State and local codes may only allow operation of this appliance in a vented configuration. Check your local and state codes.
This appliance may be installed in an aftermarket, permanently located, manufactured (mobile) home,
where not prohibited by local codes. This appliance is only for use with the type of gas indicated on
the rating plate.
If the information in this manual is not followed exactly, a fire or explosion may result,
causing property damage, personal injury or loss of life.
WARNING
IM-149
10/2018
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
Installation and Operating Instructions for Natural & LP Gas
Unvented Gas Log Heater
HM2-IPI-ECO and HM2-MIL
18", 24" and 30/33" BURNER UNITS.
IMPORTANT: READ INSTRUCTIONS CAREFULLY BEFORE BEGINNING INSTAL-
LATION OF THIS ROOM HEATER.

Questions and Answers:

Heatmaster HM2-MIL Specifications

General IconGeneral
BrandHeatmaster
ModelHM2-MIL
CategoryIndoor Fireplace
LanguageEnglish

Summary

Critical Safety Warnings and Gas Leak Procedures

General Safety Information and Precautions

Specific Safety Warnings and Installation Notes

Product Specifications and Combustion Air

Minimum Fireplace Dimensions and BTU Ratings

Required fireplace sizes and BTU outputs for different models.

Combustion and Ventilation Air Requirements

Necessary provisions for adequate air supply for safe operation.

Installation Clearances and Space Calculation

Confined Space Calculation Formula

Formula to determine maximum heater rating in confined spaces.

Sidewall and Ceiling Clearances

Minimum clearances from heater to walls and ceiling.

Mantel and Height Clearance Requirements

Mantel Clearance Guidelines (With/Without Hood)

Safe clearance distances for mantels, with and without hoods.

Unsafe Mantel Installation Example

Illustration of an unsafe mantel installation and correction.

Floor Clearance Requirements

Fireplace Preparation and Vented Applications

Vented Application Considerations

Notes on optional vented installation and requirements.

Damper Stop Installation Procedure

Steps for installing a damper stop for proper flue opening.

System Maintenance and Cleaning

Routine Cleaning Procedures

Instructions for cleaning to prevent issues like carbon monoxide.

Annual Inspection and Servicing

Recommendation for annual inspection by a qualified technician.

Troubleshooting Millivolt Units

No Spark or Ignition Issues

Problems with igniter spark, no ignition, or gas odor when off.

Appliance Operation Issues

Covers appliance shutting off and unwanted odors.

Millivolt Unit Troubleshooting Continued

Pilot Flame Extinguishes or Burner Fails to Light

Pilot goes out after release, or burner won't light.

Combustion and Noise Issues

Addresses burner backfiring, initial odors, and whistling noise.

No Gas to Pilot

Troubleshooting steps for no gas supply to the pilot.

Troubleshooting IPI ECO Units

IPI ECO Ignition and Response Problems

No function, delayed ignition, or pilot out before burner.

IPI ECO Operation and Odor Issues

Burner not lighting, unwanted odors, or log set cycling.

IPI ECO Troubleshooting Continued and Alerts

IPI ECO Ignition Failure and Remote Issues

No ignition after spark, low remote battery, or condensation.

Module Audible Alerts Explained

Meanings of different audible alerts from the control module.

Safety Before Lighting and Operation

Critical Pre-Lighting Safety Checks

Essential safety precautions and gas smell checks before lighting.

Lighting and Shutoff Procedures

Step-by-step instructions for lighting and turning off the appliance.

Millivolt Lighting and Safety Procedures

Millivolt Pilot Lighting Instructions

Detailed steps for lighting the pilot with piezo or match.

Millivolt Ignition and Control Operation

Using the control knob for ignition and heat adjustment.

Unit Placement and Gas System Requirements

Unit Placement for Airflow

Guidelines for positioning the unit in the fireplace for optimal airflow.

Gas Piping, Pressure, and Flame Appearance

Requirements for gas piping, pressure, and correct flame appearance.

Installer Guidance and Lava Granule Placement

Key Points for Homeowner Understanding

Important operational and maintenance points for homeowners.

Lava Granules Placement Instructions

Proper placement of lava granules around the burner.

Regular Oak Log Set Part Diagrams

18-Inch Regular Oak Log Part Numbers

Diagrams and part numbers for the 18-inch Regular Oak log set.

24-Inch Regular Oak Log Part Numbers

Diagrams and part numbers for the 24-inch Regular Oak log set.

33-Inch Regular Oak Log Set Parts

Split Oak Log Set Part Diagrams

18-Inch Split Oak Log Part Numbers

Diagrams and part numbers for the 18-inch Split Oak log set.

24-Inch Split Oak Log Part Numbers

Diagrams and part numbers for the 24-inch Split Oak log set.

33-Inch Split Oak Log Set Parts

Cape Fear Oak Log Placement Diagrams

18-Inch Cape Fear Oak Log Placement

Diagrams for log placement of the 18-inch Cape Fear Oak set.

24-Inch Cape Fear Oak Log Placement

Diagrams for log placement of the 24-inch Cape Fear Oak set.

30-Inch Cape Fear Oak Log Placement

Diagrams for log placement of the 30-inch Cape Fear Oak set.

ODS Pilot Guidelines and Maintenance

ODS Pilot Technical Application and Connection

Technical details for ODS pilot application and connection.

ODS Pilot Periodic Cleaning and Annual Inspection

Procedures for periodic cleaning and annual inspection of ODS pilots.

HM2 IPI ECO Parts List

HM2 Millivolt Parts List

Heatmaster LLC Limited Warranty

Warranty Coverage and Limitations

Details warranty coverage, limitations, and exclusions.

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