Nordyne M4RL-090D-35C, M4RC-090D-35C, M4RL, M4RC-072D-35C, M4RC User Manual

Gas Furnaces

IVl4RC 92.1% AFUE Upflow

High Efficiency Furnaces

Congratulations on the purchase on your new
furnace. With our dedication to quality, superior
reliability, and outstanding warranty, we know
you will be pleased with this new appliance. This
furnace has been designed and built to provide
many years of safe and dependable home comfort,
providing it is properly installed and regular
maintenance has been performed, improper use

or insufficient maintenance can shorten the life of
the furnace and result in serious personal injury

or property damage. Please read this manual
thoroughly and familiarize yourself with the
safety, operation and maintenace procedures for

this furnace.

WARNING:

FiRE OR EXPLOSION HAZARD

* Failure to follow safety warnings exactly

could result in serious injury or property

damage.

* Do not store or use gasoline or other

flammable vapors and liquids in the vicinity
of this or any other appliance.

M4RL 92.1% AFUE Downflow

High Efficiency Furnaces

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.

WARNING:

PROPOSiTiON 65 WARNING: This product

contains chemicals known to the state of
California to cause cancer, birth defects or
other reproductive harm.

Table of Contents

Safety Information ..................................................................................................................... 3

Air for Proper Combustion .................................................................................................... 3

Flammable Vapors ............................................................................................................... 3

Gas Supply and Piping ........................................................................................................ 3

Venting System .................................................................................................................... 4

Combustibles ....................................................................................................................... 4

Flood Damage ..................................................................................................................... 4

Shutting Down the Furnace ................................................................................................. 4

Inspection ............................................................................................................................. 4

Filters ................................................................................................................................... 4

Description of Furnace ............................................................................................................. 5

Furnaces Components ......................................................................................................... 5

Venting System .................................................................................................................... 5

Category IV Furnaces .................................................................................................... 5

Combustion Air Requirements ................................................................................................. 5

Sources of Corrosion ........................................................................................................... 5

Furnace in Small Room or Closet ........................................................................................ 5

Startup and Shutdown .............................................................................................................. 6

Starting the Furnace ............................................................................................................ 6

Shutting Down the Furnace ................................................................................................. 6

Inspection ................................................................................................................................... 6

Frequency ............................................................................................................................ 6

Venting System .................................................................................................................... 6

Blower and Filter ................................................................................................................. 6

Air for Combustion ............................................................................................................... 6

Air for Comfort ...................................................................................................................... 6

Burner Operation ................................................................................................................ 7

New Construction ................................................................................................................ 7

Troubleshooting ......................................................................................................................... 7

Location of Furnace Components ........................................................................................... 8

WARNING:

The safety information listed throughout this

manual must be followed during the installation,
service, and operation of this furnace. Failure

to follow safety recommendations could result

in possible damage to the equipment, serious
personal injury, or death.

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 ifnot avoided, may result in minor
or moderate injury or property damage.

Air for Proper Combustion

WARNING:

Do not reduce the supply of fresh air to the

furnace. This could create the production of
excessive amounts of Carbon Monoxide = a

colorless, odorless gas that is a deadly poison

that could result in serious personal injury

or death. Do not block any openings that are

supplying fresh air to the room or closet the
furnace is in. if your furnace obtains its air
through a pipe to the outdoors, do not allow
the inlet of the pipe to become blocked.

Flammable Vapors

WARNING:

Do not place combustible materials on or against
the furnace cabinet or within 6 inches of the

vent pipe. Do not place combustible materials,

including gasoline or any other flammable
vapors and liquids, in the vicinity of the furnace.

A 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.

Gas Supply and Piping
This furnace does not have a pilot. It is equipped with an
ignition device which automatically lights the burner. DO
NOT try to light the burner by hand.

BEFORE OPERATING smell all around the furnace area
for gas. Be sure to smell next to the floor because some

gas is heavier than air and will settle to the floor.

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.

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.