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IMPORTANT!

 Please read all information in this manual 

thoroughly and become familiar with the capabilities and use of 
your appliance before attempting to operate or maintain this unit.

Pay attention to all safety warnings and any other special notes 
highlighted in the manual. 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.

Keep this literature where you have easy access to it in the 
future. If a problem occurs, check the instructions and follow 
recommendations given. If these suggestions don’t eliminate 
your problem, call your servicing contractor. Do not attempt to 
service this unit yourself!

M7RL DOWNfLOW - SINGLe STAGe CONDeNSING GAS fuRNACe (95+% Afue)
M7TL DOWNfLOW - TWO STAGe CONDeNSING GAS fuRNACe (95+% Afue)

Under no circumstances should the appliance owner attempt to install and/or service this equipment. Some local codes require 
licensed installation / service personnel for this type of equipment. Improper service, adjustment, or maintenance may cause 
explosion, fire, electrical shock or other hazardous conditions which may result in personal injury or property damage.

front Return

without

Coil Box

Top Return

without

Coil Box

front Return

with Coil Box

Top Return

with Coil Box

 WARNING

 AVeRTISSeMeNT

fIRe OR eXPLOSION HAZARD

• Failure to follow safety warnings exactly could 

result in serious injury or property damage.

• Installation and service must be performed 

by a qualified installer, service agency or the 

gas supplier.

• 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.

• 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.

RISQue D’INCeNDIe Ou D’eXPLOSION

•  Le non-respect des avertissements de sécurité 

pourrait entraîner des blessures graves ou des 

dommages matériels.

•  L’installation et l’entretien doivent être effectués 

par un installateur qualifié, un organisme de 

service ou le fournisseur de gaz.

•  Ne  pas entreposer ni utiliser de l’essence  ni 

d’autres  vapeurs  ou  liquides  inflammables 

dans  le  voisinage  de  cet  appareil,  ni  de  tout 

autre appareil.

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.

DO NOT DESTROY. PLEASE READ CAREFULLY & KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.

NE PAS DÉTRUIRE. VEUILLEZ LIRE ATTENTIVEMENT ET CONSERVER EN UN LIEU SÛR POUR RÉFÉRENCE ULTÉRIEURE.

uSeR’S MANuAL

For Furnaces Installed in:

 Manufactured Homes, Modular Homes/Buildings, Recreational Vehicles, Park Models, 

& Manufactured Buildings

Summary of Contents for M7RL Series

Page 1: ...ious injury or property damage Installation and service must be performed by a qualified installer service agency or the gas supplier Do not store or use gasoline or other flammable vapors and liquids...

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: ...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 perfo...

Page 4: ...ration this furnace requires unrestricted airflow for combustion and ventilation Do not block or obstruct air openings on the furnace air openings around the furnace area or the spacings around the fu...

Page 5: ...ith applicable local codes having jurisdiction Thermostat connectionsshouldbemadeaccordingtotheinstructions supplied with the thermostat and the indoor equipment The thermostat should be mounted about...

Page 6: ...formfrequentvisualinspections 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 secureda...

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: ...LLC 2016 All Rights Reserved 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 L...

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