International comfort products N8MXL, Installation Instructions Manual

Specifications are subject to change without notice.

2

441 01 1421 02

SAFETY CONSIDERATIONS

FIRE, EXPLOSION, ELECTRICAL SHOCK, AND

CARBON MONOXIDE POISONING HAZARD

Failure to follow this warning could result in dangerous

operation, serious injury, death, or property damage.
Improper installation, adjustment, alteration, service,

maintenance, or use could cause carbon monoxide

poisoning, explosion, fire, electrical shock, or other

conditions which may cause personal injury or property

damage. Consult a qualified service agency, local gas

supplier, or your distributor or branch for information or

assistance. The qualified service agency must use only

factory

−

authorized  and listed kits or accessories when

modifying this product.

!

WARNING

FURNACE RELIABILITY HAZARD

Improper installation or misapplication of furnace may

require excessive servicing or cause premature component

failure.
Application of this furnace should be indoors with special

attention given to vent sizing and material, gas input rate,

air temperature rise, unit leveling, and unit sizing.

CAUTION

!

Improper installation, adjustment, alteration, service,

maintenance, or use can cause explosion, fire, electrical shock, or

other conditions which may cause death, personal injury, or

property damage.  Consult a qualified installer, service agency, or

your distributor or branch for information or assistance.  The

qualified installer or agency must use factory

−

authorized kits or

accessories when modifying this product.  Refer to the individual

instructions packaged with the kits or accessories when installing.
Follow all safety codes.  Wear safety glasses, protective clothing,

and work gloves.  Have a fire extinguisher available.  Read these

instructions  thoroughly and follow all warnings or cautions

include in literature and attached to the unit.  Consult local

building codes, the current editions of the current edition of

National Fuel Gas Code (NFGC) NFPA 54/ANSI Z223.1 and the

current edition of National Electrical Code (NEC) NFPA 70.

Recognize safety information. This is the safety

−

alert symbol  .

When you see this symbol on the unit and in instructions or

manuals, be alert to the potential for personal injury.
Understand the signal words 

DANGER

, 

WARNING

, and

CAUTION

. These words are used with the safety

−

alert symbol.

DANGER 

identifies the most serious hazards which 

will 

result in

severe personal injury or death. 

WARNING 

signifies hazards

which 

could 

result in personal injury or death. 

CAUTION 

is

used to identify unsafe practices which 

may 

result in minor

personal injury or product and property damage. 

NOTE 

is used

to highlight suggestions which 

will

 result in enhanced

installation, reliability, or operation.

CUT HAZARD

Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care

and wear appropriate protective clothing, safety glasses and

gloves when handling parts and servicing furnaces.

CAUTION

!

1. Use only with type of gas approved for this furnace. Refer

to the furnace rating plate.

2. Install this furnace only in a location and position as spe-

cified in the “Location” section of these instructions.

3. Provide adequate combustion and ventilation air to the

furnace space as specified in “Air for Combustion and

Ventilation” section.

4. Combustion products must be discharged outdoors. Con-

nect this furnace to an approved vent system only, as spe-

cified in the “Venting” section of these instructions.

5. Never test for gas leaks with an open flame. Use a com-

mercially available soap solution made specifically for the

detection of leaks to check all connections, as specified in

the “Gas Piping” section.

6. Always install furnace to operate within the furnace’s in-

tended temperature

−

rise range with a duct system which

has an external static pressure within the allowable range,

as specified in the “Start

−

Up, Adjustments, and Safety

Check” section. 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 con-

taining the furnace, the return air shall also be handled by

duct(s) sealed to the furnace casing and terminating out-

side the space containing the furnace. See “Air Ducts” sec-

tion.

8. A gas

−

fired furnace for installation in a residential garage

must be installed as specified in the warning box in the

“Location” section.

9. The furnace may be used for construction heat provided

that the furnace installation and operation complies with

the first CAUTION in the LOCATION section of these in-

structions.

10. These Multipoise Gas

−

Fired Furnaces are CSA (formerly

A.G.A. and C.G.A). design

−

certified for use with natural

and propane gases (see furnace rating plate) and for install-

ation in alcoves, attics, basements, closets, utility rooms,

crawlspaces, and garages. The furnace is factory

−

shipped

for use with natural gas. A CSA listed  accessory gas con-

version kit is required to convert furnace for use with pro-

pane gas.

11. See Fig. 2 for required clearances to combustible construc-

tion.

12. Maintain a 1

−

in. (25 mm) clearance from combustible ma-

terials to supply air ductwork for a distance of 36 inches

(914 mm) horizontally from the furnace. See current edi-

tion of NFPA 90B or local code for further requirements.

13. These furnaces SHALL NOT be installed directly on car-

peting, tile, or any other combustible material other than

wood flooring. In downflow installations, factory access-

ory floor base MUST be used when installed on combust-

ible materials and wood flooring. Special base is not re-

quired when this furnace is installed on manufacturer’s

coil model numbers END4X, ENW4X or coil casing mod-

el number NAEAis used. See Fig. 2 for clearance to com-

bustible construction information.

INTRODUCTION

This 4

−

way multipoise Category I fan

−

assisted furnace is CSA

design

−

certified. A Category I fan

−

assisted furnace is an

appliance equipped with an integral mechanical means to either

draw or force products of combustion through the combustion

chamber and/or heat exchanger. The furnace is factory

−

shipped

for use with natural gas.
This furnace is not approved for installation in mobile homes,

recreational vehicles, or outdoors. This furnace is designed for

minimum continuous return

−

air temperature of 60

_

F (16

_

C)db

or intermittent operation down to 55

_

F (13

_

C) db such as when