Laars Mighty Therm 2 MT2H

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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.

Installation and Operation Instructions Document 1231B

H2358000A

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. For indoor installations, as an

additional measure of safety, Laars strongly recommends installation of suitable Carbon Monoxide

detectors in the vicinity of this appliance and in any adjacent occupied spaces.

AVERTISSEMENT

Assurez-vous de bien suivres les instructions

données dans cette notice pour réduire au

minimum le risque d’incendie ou d’explosion ou

pour éviter tout dommage matériel, toute blessure

ou la mort.

Ne pas entreposer ni utiliser d’essence ni d’autres

vapeurs ou liquides inflammables dans le voisinage

de cet appareil ou de tout autre appareil.

QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ:

• Ne pas tenter d’allumer d’appareils.

• Ne touchez à aucun interrupteur. Ne pas vous

servir des téléphones dansle bâtiment où vous

trouvez.

• Appelez immédiatement votre fournisseur de

gaz depuis un voisin. Suivez les instructions

du fournisseur.

• Si vous ne pouvez rejoindre le fournisseur de

gaz, appelez le sservice des incendies.

L’installation et l’entretien doivent être assurés par

un installateur ou un service d’entretien qualifié ou

par le fournisseur de gaz.

Installation and Operation

Instructions for

Mighty therM

Hydronic Boiler

Model MT2H

Water Heater

Model MT2V

Sizes 200, 300, 400

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Summary

General Information and Safety

Introduction and Model Details

Covers product introduction, model identification, warranty, and dimensions.

Installation Location and Safety

Guidance on appliance placement, clearances, and critical safety warnings.

Venting, Combustion Air, and Gas Supply

Venting and Combustion Air

Requirements for air intake, vent types, terminal locations, and common venting.

Gas Supply and Piping Installation

Guidelines for connecting the gas supply, pipe sizing, and pressure requirements.

Water Connections and Piping

Boiler Water Connections

Details on heating system piping, make-up water, flow rates, and freeze protection for boilers.

Water Heater Water Connections

Details on water system piping, flow rates, and freeze protection for water heaters.

Electrical Connections and Operation

Electrical Connections and Grounding

Instructions for main power, field wiring, and mandatory electrical grounding.

System Startup and Temperature Control

Procedures for filling the system, startup, and operating temperature settings.

Burner Operation and Altitude Adjustments

Guidance on burner startup, high altitude setup, and safety checks.

Maintenance and Troubleshooting

Routine Maintenance Procedures

Covers system maintenance, pump lubrication, strainer cleaning, and vent inspection.

Troubleshooting Common Issues

Diagnosing and resolving lockouts, ignition problems, short cycling, and gas consumption.

Replacement Parts

Parts Ordering and List

Information on how to order parts and a comprehensive list of components.