Laars Mighty Therm HH 600

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FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician,

qualified in hot water boiler installation and maintenance. Improper installation and/or operation could

create carbon monoxide gas in flue gases which could cause serious injury, property damage, or death.

Improper installation and/or operation will void the warranty.

WARNING

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.

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 phone in your building.

• Immediately call your gas supplier from a nearby phone. 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 gas

supplier.

H0117400E

Installation and Operation

Instructions for

Mighty Therm

Hydronic Boilers

Models HH and PH

Sizes 500-1825

These instructions are to be stored in the pocket provided on the boiler

Installation and Operation Instructions Document 1049E

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Summary

General Information

Flow Requirements

Variable Water Flow Systems

Discusses systems with zone valves or 3-way valves and their flow impact.

Installation

Boiler Placement

Installation of Indoor Boilers

Combustion Air Supply

Specifies requirements for providing adequate combustion air to the boiler room.

Venting

Outlines requirements for the venting system, including draft diverters and vent pipe type.

Installation of Outdoor Boilers

Gas Supply and Piping

Details instructions for connecting the gas supply and piping to the boiler.

Electrical Wiring

Covers electrical grounding requirements and wiring connections to the boiler and pump.

Water Piping of System

Filling Fully-Connected System

Operation

Controls - General

Initial Start-Up

Details the process for safely lighting the pilot and checking safety shutoff devices.

To Start Up System

Provides instructions for starting the boiler and system after initial setup and checks.

Maintenance

Troubleshooting and Analysis of Service Problems

Boiler Will Not Fire Troubleshooting

Addresses common causes and solutions when the boiler fails to ignite.

Leaking Pressure Relief Valves

Boiler Pounding or Knocking Issues

Soot and Noxious Fumes (Bad Combustion)

Details causes of soot and noxious fumes related to poor combustion and their remedies.

Water Dripping in Firebox