Series M1B, M1G, M1M & M5S
Downﬂ ow, Direct Vent (Sealed Combustion)
Forced Air Gas & Oil Furnaces
DO NOT DESTROY. PLEASE READ CAREFULLY AND KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.
It is your responsibilit y to know this produ ct
better than your customer. This includes
being able to install the product according
to strict safety guidelines and instructing the
customer on how to operate and maintain the
equipment for the life of the product. Safety
should always be the deciding factor when
installing this product and using common
sense plays an important role as well. Pay
attention to all safety warnings and any other
special notes highlighted in the manual.
Improper installation of the furnace or failure
to follow safety warnings could result in
serious injury, death, or property damage.
These instructions are primarily intended
to assist qualiﬁ ed individuals experienced
in the proper installation of this appliance.
Some local codes require licensed
installation/service personnel for this type
of equipment. Please read all instructions
carefully before starting the installation.
Return these instructions to the customer’s
package for future reference.
For installation in:
• Manufactured Homes
• Recreational Vehicles, Park Models, &
• Modular Homes/Buildings
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
• 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 ﬁ re department
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
• Do not store or use gasoline
or other ﬂ ammable vapors and
liquids in the vicinity of this or
any other appliance.