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WARNING:
Do not use this appliance if any part
has been submerged under water. Im-
mediately call a qualified service tech-
nician to inspect the appliance and to
replace any part of the control system
and any gas control that has been
submerged underwater.
NOTICE TO INSTALLER
Installer is advised to follow carefully all instruc-
tions and warnings in this manual to insure
maximum performance, safety, and operating
efficiency of these appliances. Improper installa-
tion may create hazardous conditions, and will
void the appliance warranty.
GENERAL
General Description
The M3 series gas furnaces are listed direct
vent (sealed combustion) forced air furnaces
for use with both natural and propane gases.
The M3 series is a Category IV and type FSP
furnace. The M3 furnace series has been
certified to the ANSI Z21.47/CSA2.3-2001 for
use in the United States and Canada and to the
UL307B —1995 for use in the United States.
These furnaces may be installed in:
1. Manufactured Homes.
2. Park Models and Manufactured buildings
3. Modular Homes/Buildings
The following are safety guidelines with refer-
ences to their specific sections or pages in the
manual.
1. Use only type of gas approved for this
furnace. Refer to the furnace rating plate.
2. Install this furnace only in location and
position as specified in pages 7 - 13 of
these instructions.
3. Provide adequate combustion and ventila-
tion air to the furnace space as specified in
pages 13 - 20 of these instructions.
4. Combustion products must be discharged
outdoors, connect this furnace to an ap-
proved vent system only, as specified in
pages 14-19 of these instructions.
5. Never test for gas leaks with an open
flame. Use a commercially available soap
solution made specifically for the detection
of leak to check all connections.
6. Always install furnace to operate within the
furnace’s intended temperature rise range
with a duct system that has an external
static pressure within the allowable range,
as specified in page 4 of these instruc-
tions. See furnace rating plate.
7. When a furnace is installed so that supply
ducts carry air circulated by the furnace to
areas outside the space containing the
furnace, the return air shall also be handled
by duct(s) sealed to the furnace casing
and terminating outside the space contain-
ing the furnace. Note: This section only
applies to furnaces installed with side or
top return air.
8. A gas-fired furnace for installation in a
residential garage must be installed as
specified in page 7 of these instructions.
9. The furnace is not to be used for tempo-
rary heat of buildings or structures under
construction.
M3 series furnaces are air conditioning ready
as shipped. The furnace cooling capacities of
the blower motor speed taps are shown in
Table 3. Table 2 lists the shipping weights for
the M3 series furnaces.
OWNER INFORMATION
NORDYNE has been involved in the design of
products for the manufactured home industry
since the first manufactured home or trailer
was built.
NORDYNE originated the sealed combustion
system, which separates the furnace com-
bustion system from the living area of the
home, now a standard for the manufactured
home industry.
NORDYNE engineers developed the first cen-
tral heating system and the first central air
conditioner for manufactured homes.
NORDYNE is dedicated to bringing to its cus-
tomers the finest heating and cooling comfort
possible. NORDYNE constantly seeks to fur-
ther refine its products to continuously provide
exceptional comfort.