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3

IMPORTANT NOTE

If the unit needs to be shut down for an extended period of 

time, turn off both the gas and electrical power. For your 

safety always turn off both the gas and electrical power before 

performing service or maintenance on the furnace. If the gas 

supply to the unit must be shut off, refer to the shut down 

instructions on 

page 7

.

GAS SUPPLY & PIPING

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 

neighbors phone. 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.

QUE FAIRE S’IL Y A UNE ODEUR DE GAZ

•  Ne tenter d’allumer aucun appareil.

•  Ne toucher à aucun interrupteur électrique; n’utiliser aucun 

téléphone dans le bâtiment.

•  Évacuer l’immeuble immédiatement.

•  Appeler immédiatement le fournisseur de gaz en employant 

le téléphone d’un voisin. Respecter les instructions du 

fournisseur de gaz.

•  Si personne ne répond, appeler le service des incendies.

 WARNING:

All gas piping and shutoff valves must be installed in 

compliance with local codes and utility regulations 

by licensed installers. DO NOT attempt to modify, or 

tap into existing gas lines yourself. Fire or explosion 

may result causing property damage, personal injury 

or loss of life. Failure to follow the safety warnings 

exactly could result in serious injury, death or property 

damage.

 WARNING:

The furnace was shipped from the factory equipped 

to operate on natural gas. Conversion to LP/propane 

gas must be performed by a licensed HVAC technician 

using a factory supplied conversion kit. Failure to use 

the proper conversion kit can cause fire, explosion, 

property damage, carbon monoxide poisoning, 

personal injury, or death.

This furnace does not have a pilot. It is equipped with an ignition 

device which automatically lights the burner. 

DO NOT

 light the 

burner by hand.

Safety markings are used frequently throughout this manual to 

designate a degree or level of seriousness and should not be 

ignored. 

WARNING

 indicates a potentially hazardous situation that 

if not avoided, could result in personal injury or death. 

CAUTION

 

indicates a potentially hazardous situation that if not avoided, may 

result in minor or moderate injury or property damage.

 WARNING:

To avoid possible equipment damage, fire, or 

personal injury, the following instructions must be 

observed regarding unit maintenance and operational 

procedures.

 WARNING:

PROPOSITION 65 WARNING: This product contains 

chemicals known to the state of California to cause 

cancer, birth defects or other reproductive harm.

•  To achieve optimum performance and minimize equipment failure, 

it is recommended that periodic maintenance be performed on 

this unit. The ability to properly perform maintenance on this 

equipment requires certain mechanical skills and tools. Please 

consult your dealer for maintenance information and availability 

of maintenance contracts.

•  The area around the gas furnace (

Figure 1, (page 4)

) and the 

vicinity of any other gas appliances must be kept clear and free 

of combustible materials, gasoline, and other flammable vapors 

and liquids. Do not store or use flammable items such as paint, 

varnish, or strippers in the vicinity of the unit.

•  Do not use the area around the unit as a storage area. This area 

must be kept clean and clear of loose or exposed insulation 

materials. Examine the unit’s area when it is installed or when 

insulation is added, since some insulation materials may be 

combustible.

FLOOD DAMAGE

 WARNING:

Do not use this furnace if any part has been under 

water. A flood damaged furnace is extremely 

dangerous. Attempts to use the furnace can result in 

fire or explosion. A qualified service agency should 

be contacted to inspect the furnace and to replace all 

gas controls, control system parts, electrical parts that 

have been wet or the furnace if deemed necessary.

 AVERTISSEMENT:

Ne pas installer ce générateur d’air chaud si l’une de ses pièces a 

été immergée dans de l’eau. Un générateur d’air chaud endommagé 

par une inondation est extrêmement dangereux. Toute tentative 

d’utiliser le générateur d’air chaud peut entraîner un incendie 

ou une explosion. Il faut communiquer avec un organisme de 

service qualifié pour l’inspection du générateur d’air chaud et le 

remplacement de toutes pièces électriques ou parties du système 

de commande qui ont été mouillées ou immergées.

•  Familiarize yourself with the controls that shut off the gas and 

electrical power to the unit.

IMPORTANT SAFETY INFORMATION

Summary of Contents for M7RL

Page 1: ...r 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...

Page 2: ...INFORMATION 5 ABOUT THE FURNACE 5 AIR FILTERS 5 THERMOSTAT 5 FURNACE IN A SMALL ROOM OR CLOSET 5 SOURCES OF CORROSION 5 WARRANTY INFORMATION 5 MAINTENANCE INFORMATION 6 BLOWER FILTER 6 CONDENSATE DRAI...

Page 3: ...hazardous situation that if not avoided could result in personal injury or death CAUTION indicates a potentially hazardous situation that if not avoided may result in minor or moderate injury or prop...

Page 4: ...sdie wall around thevent andairintake pipe s aresealedtoprefent infiltrationofcombustionproductsintothebuilding Check that furnace vent and air intake terminal s are not obstructed in any way during a...

Page 5: ...with applicable local codes having jurisdiction Thermostat connections should be made according to the instructions supplied with the thermostat and the indoor equipment The thermostat should be mount...

Page 6: ...nt visual inspections of the furnace for obvious signs of deterioration The furnace should be sound without sagging cracks gaps etc around the base The return air duct connection s is secured and seal...

Page 7: ...valve outside the furnace 3 Turn electric to the furnace off 4 Open the door to the burner compartment 5 Set the gas valve ON OFF knob switch to the OFF position See Figure 2 for gas valve type and kn...

Page 8: ...rved FURNACE COMPONENTS Figure 3 M7RL M7TL Furnace Components Blower Assembly Inducer Assembly Single Stage Gas Valve Gas Manifold Burner Assembly ON OFF Switch Control Board Limit Switch Inline Drain...

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