ICP N9MP1040B08C2, N9MP1050B12C2, N9MP1060B12C2, N9MP1075B12C2, N9MP1080F16C2 Installation Guide

These instructions must be read and understood completely before attempting installation.

Safety Labeling and Signal Words

DANGER, WARNING, CAUTION, and NOTE

The signal words DANGER, WARNING,

CAUTION, and NOTE are used to identify levels of

hazard seriousness. The signal word DANGER is
only used on product labels to signify an immediate
hazard. The signal words WARNING, CAUTION,
and NOTE will be used on product labels and

throughout this manual and other manual that may

apply to the product.
DANGER - Immediate hazards which will result in

severe personal injury or death.
WARNING - Hazards or unsafe practices which

could result in severe personal injury or death.
CAUTION - Hazards or unsafe practices which

may result in minor personal injury or product or
property damage.

NOTE - Used to highlight suggestions which will
result in enhanced installation, reliability, or
operation.

Signal Words in Manuals
The signal word WARNING is used throughout

this manual in the following manner:

The signal word CAUTION is used throughout
this manual in the following manner:

Signal Words on Product Labeling

Signal words are used in combination with
colors and/or pictures or product labels.

z_ Safety-alert symbol

When you see this symbol on the unit and in
instructions or manuals, be alert to the

potential for personal injury.

TABLE OF CONTENTS

Safety considerations ........................... 4

Safe Installation Requirements ................... 4

Installation ..................................... 6

Combustion & Ventilation Air ..................... 10

Vent and Combustion Air Piping .................. 14

Concentric Termination .......................... 32

Gas Supply and Piping .......................... 33

Electrical Wiring ................................ 38

Ductwork and Filter ............................. 39

Checks and Adjustments ........................ 42

Furnace Maintenance ........................... 45

Sequence of Operation & Diagnostics ............. 46

Technical Support .............................. 48

Use of the AHRI Certified TM Mark indicates a
manufacturer's participation in the program.

For verification of certification for individual
products, go to www.ahridirectory.org .

International Comfort Products, LLC

Lewisburg, TN 37091 U.S.A.

www.icpusa.com

Portions of the text and tables are reprinted from NFPA 54/ANSI Z223.1-2009_, with permission of National Fire Protection Association, Quincy, MA 02269 and American Gas Association, Washington, DC

20001. This reprinted material is not the complete and official position of the NFPA or ANSi, on the referenced subject, which is represented only by the standard in its entirety.

PERSONAL INJURY, AND/OR PROPERTY

DAMAGE HAZARD
Failure to carefully read and follow this warning could

result in equipment malfunction, property damage,
personal injury and/or death.

Installation or repairs made by unqualified persons could
result in equipment malfunction, property damage,
personal injury and/or death.

The information contained in this manual is intended for

use by a qualified service technician familiar with safety
procedures and equipped with proper tools and test

instruments.
Installation must conform with local building codes and

with the Natural Fuel Gas Code (NFCG) NFPA 54/ANSI
Z223.1, and National standards of Canada

CAN/CSA-B149.1 and .2 Natural Gas and Propane

Installation Codes.

INSTALLER: Affix these instructions on or adjacent to the

furnace.

CONSUMER: Retain these instructions for future
reference.

PrintedinU.S.A. 440 01 1024 04 Dec. 2010

Required Notice for Massachusetts Installations

Important

The Commonwealth of Massachusetts requires compliance with regulation 248 CMR as follows:

5.08: Modifications to NFPA-54, Chapter 10

2) Revise 10.8.3 by adding the following additional requirements:

(a)

For all side wall horizontally vented gas fueled equipment installed in every dwelling, building or structure used in whole or in part for residential
purposes, including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet

above finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall be satisfied:

1,

INSTALLATION OF CARBON MONOXIDE DETECTORS. At the time of installation of the side wall horizontal vented gas fueled equipment, the
installing plumber or gasfitter shall observe that a hard wired carbon monoxide detector with an alarm and battery back-up is installed on the floor
level where the gas equipment is to be installed, in addition, the installing plumber or gasfitter shall observe that a battery operated or hard wired

carbon monoxide detector with an alarm is installed on each additional level of the dwelling, building or structure served by the side wall

horizontal vented gas fueled equipment. It shall be the responsibility of the property owner to secure the services of qualified license
professionals for the installation of hard wired carbon monoxide detectors.

a. In the event that the side wall horizontally vented gas fueled equipment is installed in a crawl space or an attic, the hard wired carbon

monoxide detector with alarm and battery back-up may be installed on the next adjacent floor level.

b. In the event that the requirements of this subdivision can not be met at the time of completion of installation, the owner shall have a period of

thirty (30) days to comply with the above requirement; provided, however, that during said thirty (30) day period, a battery operated carbon

monoxide detector with an alarm shall be installed.

2. APPROVED CARBON MONOXIDE DETECTORS. Each carbon monoxide detector as required in accordance with the above provisions shall
comply with NFPA 720 and be ANSI/UL 2034 listed and IAS certified.

3. SIGNAGE. A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a minimum height of eight (8) feet
above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment. The sign shall

read, in print size no less than one-half (1/2) inch in size, "GAS VENT DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS".

4. INSPECTION. The state of local gas inspector of the side wall horizontally vented gas fueled equipment shall not approve the installation unless,

upon inspection, the inspector observes carbon monoxide detectors and signage installed in accordance with the provisions of 248 CMR

5.08(2)(a) 1 through 4.

(b) EXEMPTIONS: The following equipment is exempt from 248 CMR 5.08(2)(a) 1 through 4:

1. The equipment listed in Chapter 10 entitled "Equipment Not Required To Be Vented" in the most current edition of NFPA 54 as adopted by the
Board; and

2. Product Approved side wall horizontally vented gas fueled equipment installed in a room or structure separate from the dwelling, building or
structure used in whole or in part for residential purposes.

(c)

MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING SYSTEM PROVIDED. When the manufacturer of Product Approved side wall
horizontally vented gas equipment provides a venting system design or venting system components with the equipment, the instructions provided by

the manufacturer for installation of the equipment and the venting system shall include:

1. Detailed instructions for the installation of the venting system design or the venting system components; and

2. A complete parts list for the venting system design or venting system.

(d)

MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING SYSTEM NOT PROVIDED. When the manufacturer of a Product Approved side
wall horizontally vented gas fueled equipment does not provide the parts for venting the flue gases, but identifies "special venting systems", the
following requirements shall be satisfied by the manufacturer:

1. The referenced "special venting system" instructions shall be included with the appliance or equipment installation instructions; and

2. The "special venting systems" shall be Product Approved by the Board, and the instructions for that system shall include a parts list and detailed

installation instructions.

(e)

A copy of all installation instructions for all Product Approved side wall horizontally vented gas fueled equipment, all venting instructions, all parts lists
for venting instructions, and/or all venting design instructions shall remain with the appliance or equipment at the completion of the installation.

For questions regarding these requirements, please contact the Commonwealth of Massachusetts Board of State Examiners of Plumbers and Gas

Fitters, 239 Causeway Street, Boston, MA 02114. 617-727-9952

440 01 1024 04 Specifications are subject to change without notice. 2

START-UP CHECK SHEET

For 90+ Furnace

(This sheet is optional. Keep this page for future reference.)

Date of Start-Up:

Dealer Name:

Address:

City, State(Province), Zip or Postal Code:

Phone:

Owner Name:

Address:

City, State(Province), Zip or Postal Code:

Model Number:

Serial Number:

Setup Checks

Check the box when task is complete

Calculated Firing Rate:(See Checks and
Section).

Heating Check

Measured Line Pressure when Firing Unit:

Measured Manifold Gas Pressure:

Temperature of Supply Air:

Temperature of Return Air:

Temperature Rise (supply-return temperature): (o)__

In Rise (see furnace rating plate)? (o)__

Static Pressure (Ducts): Supply Air Return

Which blower speed tap is used? (Heating)

Optional Check: CO ? CO2 ?

Cooling Check

Temperature of Supply Air:

Adjustments

o)__

All Electrical Connections Tight?

Have hoses been relocated for furnace application
(upflow/horizontal)?

Condensate Drain Connected?

Condensate Drain Trapped?

Manual Gas Shut-Off Upstream of Furnace/Drip-Leg?LU

Gas Valve turned ON? Lj

Type of Gas: Natural: Lj Propane: Lj

Filter Type and Size:

Temperature of Return Air:

Temperature Difference:

Static Pressure (Ducts) cooling: Supply Air

Blower Speed Tap used for cooling:
Dealer Comments:

(o)__
(o)__

__ Return

3 Specifications are subject to change without notice. 440 01 1024 04

SAFETY CONSIDERATIONS

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 modifyingthis 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. Use quenching cloth for
brazing operations. Have fire extinguisher available.

Read these instructions thoroughly and follow all
warnings or cautions included in literature and attached

to the unit. Consult local building codes, the current
editions of the National Fuel Gas Code (NFCG) NFPA

54/ANSI Z223.1, and the National Electrical Code (NEC)
NFPA 70.

In Canada refer to the current editions of the National
standards of Canada CAN/CSA-B149.1 and .2 Natural
Gas and Propane Installation Codes, and Canadian

Electrical Code CSA C22.1.
Recognize safety information. This is the safety-alert

symbol z_. When you see this symbol on the unit and in
instructions or manuals, be alert to the potential for
personal injury. Understand these 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.

ELECTRICALSHOCK HAZARD

Failure to follow this warning could cause personal

injury or death.
Before performing service or maintenance operations

on unit, always turn off main power switch to unit and
install lockout tag. Unit may have more than one
power switch.

CARBON MONOXIDE POISONING AND FIRE
HAZARD

Failure to follow safety warnings could result in
personal injury, death, and/or property damage.

This furnace is not designed for use in mobile homes,
trailers or recreational vehicles.

CUT HAZARD

Failure to follow this caution may result in damage
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.

Safe Installation Requirements

FIRE, EXPLOSION, AND ASPHYXIATION HAZARD
Improper adjustment, alteration, service,

maintenance or installation could cause personal
injury, death and/or property damage.

Installation or repairs made by unqualified persons
could result in hazards to you and others.

Installation MUST conform with local codes or, in

the absence of local codes, with codes of all

governmental authorities having jurisdiction.

The information contained in this manual is

intended for use by a qualified service agency that
is experienced in such work, is familiar with all
precautions and safety procedures required in
such work, and is equipped with the proper tools

and test instruments.

NOTE: This furnace is design-certified by the CSA International
(formerly AGA and CGA) for installation in the United States and
Canada. Refer to the appropriate codes, along with this manual,

for proper installation.

• Use only the Type of gas approved for this furnace (see
Rating Plate on unit). Overfiring will result in failure of heat
exchanger and cause dangerous operation. (Furnaces
can be converted to Propane gas with approved kit.)

• Install this furnace only in a location and position as
specified in "Installation" of these instructions.

• Provide adequate combustion and ventilation air to the

furnace as specified in "Combustion and Ventilation Air" of
these instructions.

Combustion products must be discharged outdoors.
Connect this furnace to an approved vent system only, as

specified in "Vent and Combustion Air Piping" of these
instructions.

Never test for gas leaks with an open flame. Use a
commercially available soap solution made specifically for

the detection of leaks to check all connections, as

specified in "Gas Supply and Piping, Final Check" of these
instructions.

Always install furnace to operate within the furnace's

intended temperature-rise range with a duct system which
has an external static pressure within the allowable range,
as specified in "Technical Support Manual" of these
instructions. See furnace rating plate.

Specifications are subject to change without notice

44001 102404

• 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 a duct(s) sealed to the furnace casing and terminating
outside the space containing the furnace.

• A gas-fired furnace for installation in a residential garage
must be installed as specified in "Installation" of these

instructions.

• This furnace is not to be used for temporary heating of
buildings or structures under construction.

• This furnace is NOT approved for installation in

mobile homes, trailers or recreation vehicles.

• Seal around supply and return air ducts.

• Install correct filter type and size.

• Unit MUST be installed so electrical components are
protected from direct contact with water.

SafetyRules

Your unit is built to provide many years of safe and dependable

service providing it is properly installed and maintained. However,
abuse and/or improper use can shorten the life of the unit and

create hazards for you, the owner.

A. The U.S. Consumer Product Safety Commission encourages

installation of carbon monoxide alarms. There can be various
sources of carbon monoxide in a building or dwelling. The

sources could be gas-fired clothes dryers, gas cooking
stoves, water heaters, furnaces, gas-fired fireplaces, wood

fireplaces.

Carbon monoxide can cause serious bodily injury and/or
death. Carbon monoxide or "CO" is a colorless and odorless

gas produced when fuel is not burned completely or when the

flame does not receive sufficient oxygen.

Therefore, to help alert people of potentially dangerous carbon

monoxide levels, you should have a commercially available
carbon monoxide alarm that is listed by a nationally

recognized testing agency in accordance with Underwriters
Laboratories Inc. Standard for Single and Multiple Station
Carbon Monoxide Alarms, ANSl/UL 2034 or the CSA 6.19-01
Residential Carbon Alarming Devices installed and
maintained in the building or dwelling concurrently with the

gas-fired furnace installation (see Note below). The alarm
should be installed as recommended by the alarm

manufacturer's installation instructions.

a.

There can be numerous sources of fire or smoke in a building

or dwelling. Fire or smoke can cause serious bodily injury,
death, and/or property damage. Therefore, in order to alert
people of potentially dangerous fire or smoke, you should have

fire extinguisher and smoke alarms listed by Underwriters

Laboratories installed and maintained in the building or
dwelling (see Note below).

Note: The manufacturer of your furnace does not test any alarms

and makes no representations regarding any brand or type
of alarms.

C.

To ensure safe and efficient operation of your unit, you should

do the following:

1.

Thoroughly read this manual and labels on the unit. This

will help you understand how your unit operates and the
hazards involved with gas and electricity.

2.

Do not use this unit if any part has been under water.

Immediately call a qualified service technician to inspect the

unit and to replace any part of the control system and any gas
control which has been under water.

3. Never obstruct the vent grilles, or any ducts that provide
air to the unit. Air must be provided for proper combustion
and ventilation of flue gases.

FrozenWater Pipe Hazard

WATER DAMAGE TO PROPERTY HAZARD

Failure to follow this caution may result in property
damage.

Do not leave your home unattended for long periods
during freezing weather without turning off water

supply and draining water pipes or otherwise

protecting against the risk of frozen pipes and
resultant damage.

Your furnace is designed solely to provide a safe and comfortable

living environment. The furnace is NOT designed to ensure that
water pipes will not freeze. It is equipped with several safety

devices that are designed to turn the furnace off and prevent it from
restarting in the event of various potentially unsafe conditions.

If your furnace remains off for an extended time, the pipes in your
home could freeze and burst, resulting in serious water damage.

If the structure will be unattended during cold weather you should

take these precautions.

1. Turn off the water supply to the structure and drain the water
lines if possible and add an antifreeze for potable water to

drain traps and toilet tanks. Open faucets in appropriate
areas.

-or-

2.

Have someone check the structure frequently during cold
weather to make sure it is warm enough to prevent pipes
from freezing. Instruct them on a service agency to call to
provide service, if required.

-or-

3.

Install a reliable remote sensing device that wilt notify
somebody of freezing conditions within the home.

WinterShutdown

If you go away during the winter months and do not leave the heat
on in your home, the plastic transition box and the condensate trap
on the furnace must be protected from freeze damage.(See
Figure 11 trough Figure 20)

1. Disconnect the 5/8"(15.9mm) OD rubber hose from the vent
drain fitting that is located downstream of the combustion

blower. Insert a funnel into the hose and pour four(4) ounces
of sanitary type (RV) antifreeze into the condensate trap.
Reconnect the 5/8"(15.9mm) OD rubber hose to the stub on
the vent drain fitting. Secure with the hose clamp.

2. Disconnect the 3/4" (15.9mm)OD rubber hose from the
condensate trap. Insert a funnel into the hose and and pour
four(4) ounces of sanitary type (RV) antifreeze into the

plastic Transition box. Squeeze the hose together near the
end and quickly reconnect the 3/4" (19.1mm) OD rubber

hose to the stub on the condensate trap. Secure with the
hose clamp.

When you return home, your furnace will be ready to start, as it is

not necessary to drain the antifreeze from the furnace.

44001102404

Specifications are subject to change without notice

Installation

CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in

personal injury or death.

This furnace can NOT be common vented or

connected to any type B, BW or L vent or vent
connector, nor to any portion of a factory-built or
masonry chimney. If this furnace is replacing a
previously common-vented furnace, it may be
necessary to resize the existing vent and chimney to
prevent oversizing problems for the other
remaining appliance(s). See Venting and Combus-

tion Air Check in Gas Vent Installation section. This

furnace MUST be vented to the outside.

Location and Clearances

1. Refer to Figure 1 or Figure 2 for typical installation and
basic connecting parts required. Refer to Figure 5 for

typical horizontal direct vent installation and basic

connecting parts required. Supply and return air plenums
and duct are also required.

2. If furnace is a replacement, it is usually best to install the

furnace where the old one was. Choose the location or

evaluate the existing location based upon the minimum
clearance and furnace dimensions (Figure 3).

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SeeVentTermination
Shieldingin VentSection. Coupling on inside

InletPipe _[Z;i I_ "8" (203.2mm)Min. \ / '\ /
(notusedonF [ _ 20' (6 lm_ Max in '_, / , 8" Min

• • \" / ' \ / i _ '

S,ngle.P,pe_ L <lJ) sameatmosphericzone \ _" / i

moael} .... \/_ ._.

VentPipesMUST -- : -_-- _ _ .....A

be supported Hori- _ u_::_
zontallyand Vertically _ i "8" (-_03.2mm)Min.

\ andoutsideofwallto

\,, restrainventpipe

,'_" _ • i,_

_ ' ,_ _ ',

i 20'( .1m)Max.

Typical Downflow Installation

-_ in s_me
atmo.'phericzone

°[

i/

Dlscharge_

_

• Increaseminimumfrom 8" (203.2mm)to 18" (457.2mm)for coldclimates(sus-
tainedtemperatures0° F (-17° C)andbelowfor 24 ormoreconsecutivehours),

25-23-33a

Typical Upflow Installation

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"8" (203.2mm) Min.
20 (6.1m) Max. , _ i Couplingon endsof

in same _1 I_ / _ exhaust pipe. Total
atmospheric [_ __ !_tuP_d0n // I_\ pipe s c°upling°ut-

___ 5' U_ . _ _ side structure = 8"

zune _ _ Singleffipe / J;

VentPipesMUSTbe = .._

supported _ _" ....

Horizontallyand o /. , ' '

Vertically _" i 20 6.1m)Max.

* Increaseminimumfrom8"(203.2mm)to18"(457.2mm)for coldclimates(sus-
tainedtemperatures0° F (-17° C)andbelowfor24or moreconsecutivehours),

Aluminumornon-rustingshieldrecommended.(SeeVent
TerminationShieldingfordimensions).

_/._ _-I> model) '_ (203.2omm!

_ _,_ "-..........

= *8 2032mm) MIn

I, " i ins_[meatmosphericzone

25-23-33

CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in

personal injury or death.
Do NOT operate furnace in a corrosive atmosphere

containing chlorine, fluorine or any other damaging
chemicals, which could shorten furnace life.

Refer to Combustion & Ventilation Air section,
Contaminated Combustion Air for combustion air

evaluation and remedy.

FROZEN AND BURST WATER PIPE HAZARD
Failure to follow this caution may result in property

damage.
Special precautions MUST be made if installing

furnace in an area which may drop below freezing.
This can cause improper operation or damage to

equipment. If furnace environment has the potential
of freezing, the drain trap and drainline must be
protected. The use of electric heat tape or RV

antifreeze is recommended for these installations.

(See "Condensate Trap Freeze Protection Section")

Do NOT operate furnace in a corrosive atmosphere
containing chlorine, fluorine or any other damaging
chemicals. Refer to Combustion & Ventilation Air section,

Contaminated Combustion Air.

Specifications are subject to change without notice

44001 102404

InstallationRequirements

1. Install furnace level.

2. This furnace is NOT to be used for temporary heat of buildings
or structures under construction.

3.

Install the vent pipes as short as practical. (See Gas Vent
Installation section).

4.

Do NOT install furnace directly on carpeting, tile or other
combustible material other than wood flooring.

5.

Maintain clearance for fire safety and servicing. A front
clearance of 24" (609.6mm) required and 30" (762mm)

recommended for access to the burner, controls and filter.
See clearance requirements in Figure 3.

6.

Use a raised base if the floor is damp or wet at times.

7.

Residential garage installations require:

• Burners and ignition sources installed at least 18"
(457.2mm) above the floor.

Furnace must be located or physically protected from
possible damage by a vehicle.

8.

If the furnace is to be suspended from the floor joists in a
basement or a crawl space or the rafters in an attic, it is
necessary to use steel pipe straps or an angle iron frame to
attach the furnace. These straps should be attached to the

furnace with sheet metal screws and to the rafters or joists

with bolts. The preferred method is to use an angle iron frame
bolted to the rafters or joists.

9.

Local codes may require a drain pan under the entire furnace
and condensate trap when the furnace is installed in attic
application.

This furnace may be used for construction heat provided that all
the following conditions are met:

The furnace is permanently installed with all electrical

wiring, piping, venting and ducting installed according to

these installation instructions. A return air duct is provided,

sealed to the furnace casing, and terminated outside the
space containing the furnace. This prevents a negative

pressure condition as created by the circulating air blower,
causing a flame rollout and/or drawing combustion products

into the structure.

• The furnace is controlled by a thermostat. It may not be "hot
wired" to provide heat continuously to the structure without

thermostatic control.

Clean outside air is provided for combustion. This is to
minimize the corrosive effects of adhesives, sealers and
other construction materials. It also prevents the
entrainment of drywall dust into combustion air, which can
cause fouling and plugging of furnace components.

The temperature of the return air to the furnace is

maintained between 55° F (13° C) and 80° F (27° C), with no
evening setback or shutdown. The use of the furnace while

the structure is under construction is deemed to be

intermittent operation per our installation instructions.

The air temperature rise is within the rated rise range on the
furnace rating plate, and the firing rate has been set to the

rating plate value.

The filters used to clean the circulating air during the

construction process must be either changed or thoroughly
cleaned prior to occupancy.

The furnace, ductwork and filters are cleaned as necessary
to remove drywall dust and construction debris from all

HVAC system components after construction is completed.

After construction is complete, verify furnace operating

conditions including ignition, input rate, temperature rise
and venting according to these instructions.

44001 102404

Specifications are subject to change without notice

Dimensions & Clearances

21/_

--1 F

_..z-Iz" fVENT (N9MPD & *9MPD)

TO P "\-

/

'_ t H

-_ E

LEFT SIDE ,611/1__

TRAP(KO)(COUNTERFLOW)_ _

]

GAS...

AIRINTAKE(KO) ,/_,,

(ALTERNATE) 4:1:_116"_J)

TRAP (KO) (122.2) _

UPFLOW/HORIZONTAL.............

• THERMOSTAT //'k __ 7 --_

VENT ........_J.)

i

(177.8)

215/8 I 47/8
(549.3) (123.8)

24

(609.6)

........ AIR INTAKE

ELECTRICAL

11/4

(32)

13/B

(34.9)

175/16 1913/16
(439.7) (503.2)

111/16I
(42i9)

A

FRONT

COMBUSTIBLE MATERIALS FOR ALL UNITS

MINIMUM CLEARANCES TO

REAR 0
FRONT (combustion air openings 3" (76.2)

in furnace and in structure)

Required For Service *24" (609.6)

ALL SIDES Of SUPPLY PLENUM 1" (25.4)

SIDES 0

VENT 0
TOP OF FURNACE 1" (25.4)

*30" (762mm)dearancerecommendedforfurnaceremoval.

Horizontalposition:Linecontactispermissibleonlybetween
linesformedbyintersectionsoftopandtwosidesoffurnace
jacket,andbuildingjoists,studsorframing.

NOTE: Evaporator "A" coil drain pan dimensions may

vary from furnace duct opening size. Always consult

evaporator specifications for duct size
requirements.

Furnace is designed for bottom return or side
return.

Return air through back of furnace is NOT allowed,

(31.7)

.... 231/8

C (587.4)

Unit

Capacity

N9MP1040/050B^^

N9MP1060/075B^^

N9MP1080/100F^^

N9MPl100/125J^^

N9MP2050/075B^^

N9MP2080/100F^^

N9MP2100/125J^^

N9MPD040/050F^^

N9MPD060/075F^^

N9MPD080/100J^^

N9MPD125L^^

*9MPD050/075F^^

*9MPD080/100J^^

*9MPD125L^^

* Denotes Brand

^^ Cooling Air Flow

Cabinet

BOTTOM

ALL DIMENSIONS - IN(MM)

1in=25,4mm

_ 37/8

(98.4)

Bottom Top

Drawing is representative, but some models may vary

/

/ 281/2 (724)

23/8(60)_

11/16(27)_

GAS..

\

1110

(10) 413/16_

I r;I '/18 .........

91 /16 (6 I1)/

_, (122)

27

175/16

(440)111,

_/t, ' VENT(KO)

_\]-) TRAP(KO)

C- UPFLOW/HORIZONTAL

{2'I}3

47/8 215/8
(124) - (549)

KO = KnockOut 25-23-36b

r

/' RIGHT SIDE

,' / TRAP(COUNTERFLOW)

ELECTRICAL(KO)

_- I AIR INTAKE (KO)

_. ).......... (ALTERNATE)

_J

(178) \ 21/4(57)

THERMOSTAT T

1

(489)

(KO)

24

(610)

17/8

(48)

3L

8 44001 102404

Specifications are subject to change without notice

KnockOuts for upflow and downflow installations or top to bottom for horizontal

installations.

Ventand Combustion Air Connections

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 clothing, safety
glasses and gloves when handling parts and

servicing furnaces.

Use a hammer and screwdriver to strike a sharp blow (See
Figure 4) directly to the knockout tie points or use a hammer in the

upper left corner of the desired knockout. Remove any burrs and
sharp edges.

Hammer and Screwdriver used

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiifor Knockout

!'

25-40-06

NOTE: If a knockout does not come out after two sharp blows, pull
and snip as needed to remove the knockout.

InstallationPositions

This furnace can be installed in an upflow, horizontal (either left or

right) or downflow airflow position. DO NOT install this furnace on
its back. For the upflow position, the return air ductwork can be
attached to either the left or right side panel and/or the bottom. For
horizontal and downflow positions, the return air ductwork must be

attached to the bottom. The return air ductwork must never be
attached to the back of the furnace.

FurnaceInstallationConsiderations

The installation of the furnace for a given application will dictate the

position of the furnace, the airflow, ductwork connections, vent and
combustion air piping. Consideration must be given to the

following:

CondensateTrapand DrainLines

The supplied condensate trap must be attached to the furnace

side panel on either the left or right side. For horizontal
installations, the drain trap is vertically attached to the side panel

below the furnace. A minimum clearance of 6" (152.4mm) below
the furnace is required for the condensate trap. Downward slope of
the condensate drain line from the condensate trap to the drain

location must be provided. Adequate freeze protection of the drain
trap and the drain line must be provided. See "Condensate Drain

Trap" section for further details.

Leveling

Proper leveling of the furnace must be provided to insure proper

drainage of the condensate from the furnace. The furnace must be

level to within 1/4" (6.4mm) from front to back and from side to side

44001 102404

Specifications are subject to change without notice

For venting information literature, call 931.270.4100 with the
complete model and serial number of the furnace.

Special Venting Requirements for Installations in Canada
Installation in Canada must conform to the requirements of CSA

B149 code. Vent systems must be composed of pipe, fittings,
cements, and primers listed to ULC S636. The special vent fittings

and accessory concentric vent termination kits and accessory
external drain trap have been certified to ULC S636 for use with

those Royal Pipe and IPEX PVC vent components which have

been certified to this standard. In Canada, the primer and cement
must be of the same manufacturer as the vent system - GVS-65

Primer (Purple) for Royal Pipe or IPEX System 636, PVC/CPVC
Primer, Purple Violet for Flue Gas Venting and GVS-65 PVC

Solvent Cement for Royal Pipe or IPEX System 636(1),M,PVC
Cement for Flue Gas Venting, rated Class IIA, 65 deg C. must be

used with this venting system - do not mix primers and cements

from one manufacturer with a vent system from a different

manufacturer. Follow the manufacturer's instructions in the use of
primer and cement and never use primer or cement beyond its

expiration date.

The safe operation, as defined by ULC S636, of the vent system is

based on following these installation instructions, the vent system
manufacturer's installation instructions, and proper use of primer

and cement. All fire stop and roof flashing used with this system
must be UL listed material. Acceptability under Canadian

standard CSA B149 is dependent upon full compliance with all
installation instructions. Under this standard, it is recommended

that the vent system be checked once a year by qualified service

personnel.

The authority having jurisdiction (gas inspection authority,

municipal building department, fire department, etc) should be
consulted before installation to determine the need to obtain a

permit.
(1) System 636 is a trademark of IPEX Inc.

Consignes sp6ciales pour I'installation de ventillation au
Canada

L'installation faite au Canada doit se conformer aux exigences du

code CSA B149. Ce syst_me de ventillation doit se composer de
tuyaux, raccords, ciments et appr_ts conformes au ULC S636. La
tuyauterie de ventillation des gaz, ses accessoires, le terminal

concentrique mural ainsi que I'ensemble du drain de condensat

exterieur ont et6 certifies ULCS 636 pour I'application des

composantes Royal Pipe, IPEX PVC qui sont certifiees & ce

standard. Au Canada, I'appr_t et le ciment doivent _tre du m_me
fabricant que le systeme d'evacuation. Uappr_t GVS-65 (Purple)

et le ciment-solvant GVS-65 doivent _tre utilise avec les Royal

Pipe. Systeme IPEX 636, appr_t PVC/CPVC, Purple pour

evacuation des gaz de combustion et systeme IPEX 636(1)'_,

ciment PVC pour evacuation des gaz de combustion, cote classe

IIA, 65 deg C. doivent _tre utilises avec le systeme d'evacuation

IPEX 636 - Ne pas combiner I'appr_t et le ciment d'un

manufacturier avec un systeme d'evacuation d'un manufacturier

different.

Bien suivre les indications du manufacturier Iors de t'utilisation de

I'appr_t et du ciment et ne pas utiliser ceux-ci si la date d'expiration

est atteinte.

Uoperation securitaire, tel que definit par ULC S636, du systeme

de ventilation est base sur les instructions d'installation suivantes,

ainsi que I'usage approprie de I'appr_t et ciment. Tout arret feu et

solin de toit utilises avec ce systeme doivent _tre des materiaux

listes UL. Uacceptation du standard Canadien CSA B419 est

directement relie& l'instaltation conforme aux instructions ci- haut

mentionnees. Le standard Canadien recommande I'inspection
par un personel qualifie et ce, une fois par annee.

Les autoritees ayant juridiction (inspecteurs de gas, inspecteurs
en b&timents, departement des incendies, etc) devraient _tre

consultees avant I'instatlation afin de determiner si un permis est
requis.

On the N9MPD or *9MPD furnace, the vent and combustion air
pipes attach to the furnace through the top panel for the upflow and
horizontal installations. For the downflow installation, the vent and

combustion air pipes attach to the furnace through the alternate
locations on the furnace side panels.

Note: On the N9MP2 furnace, the vent pipe attaches to the furnace
through the side panels. The combustion air pipe attaches to the
top panel or to the alternate location on the side panel.

On the Single Pipe furnace, the vent pipe attaches to the furnace
through the furnace side panels.

Note: Repositioning of the combustion blower is required for the
vent pipe connection to the furnace through the "right side" panel.

See "Vent and Combustion Air Piping" section for further details.

HorizontalFurnaceInstallation

This furnace can be installed horizontally in an attic, basement,

crawl space, alcove, or suspended from a ceiling in a basement or

utility room. See Figure 5. Do not install furnace on its back or in
the reverse airflow positions as safety control operation will be

adversely affected.

If the furnace is to be installed in a crawl space, consult local

codes. A suitable concrete pad or blocks are recommended for

crawl space installation on the ground.

NOTE: 6" (152.4mm) bottom clearance required for condensate
trap.

24"(609.6mm) between the front of the furnace and adjacent

construction or other appliances MUST be maintained for service

clearance. 30" (762mm) inches is required to remove furnace.

Typical Horizontal Installation

Att i C

Inlet Pipe/(not....used_?_onSingle Pipemodel)

Pipe-_

Vent

_ z/ Condensate

.!_ Trap

-%. \J_

25-23-34

NOTE: 6"(152.4mm)bottomclearancerequiredfor condensatetrap.
Auxiliarydrain panis requiredif over a finished living space.

Keep all insulating materials clear from Iouvered door. Insulating
materials may be combustible.

The horizontal furnaces may be installed directly on combustible

wood flooring or supports as long as all required furnace
clearances are met. See Figure 5.

This furnace MUST NOT be installed directly on carpeting ortile or

other combustible material other than wood flooring or supports.
For horizontal installation over a finished living space. A field

fabricated auxiliary drain pan with drain pipe is required to prevent

damage by overflow due to blocked condensate drain.

Combustion & Ventilation Air

ForSinglePipeInstallation

CARBON MONOXIDE POISONING HAZARD

Failure to follow this warning could result in
personal injury or death.

Provide adequate combustion and ventilation air.
Use methods described here to provide

combustion and ventilation air.

Furnaces require ventilation openings to provide sufficient air for

proper combustion and ventilation of flue gases. All duct or

openings for supplying combustion and ventilation air must

comply with the gas codes, or in the absence of local codes, the

applicable national codes.

Combustion and ventilation air must be supplied in accordance

with one of the following:

Note: The Combustion & Ventilation Air Section in this document,

uses tables and information from the ANSI Z223.1/NFPA

54. For use in Canada, use CSA B149.1 for this information.

1. Section 9.3, Air for Combustion and Ventilation, of the National
Fuel Gas Code, (NFGC), ANSI Z223.1/NFPA 54-2009 in the

U.S.,

2. Sections 8.2, 8.3, 8.5, 8.6, 8.7, and 8.8 of National Standard of
Canada, Natural Gas and Propane Installation Code

(NSCNGPIC), CSA B149.1-05 in Canada,

3. Applicable provisions of the local building code.

This furnace can NOT be common vented or connected to any
type B, BW or L vent or vent connector, nor to any portion of a
factory-built or masonry chimney. Multistory venting is NOT

permitted. If this furnace is replacing a previously common-vented

furnace, it may be necessary to resize the existing vent and

chimney to prevent oversizing problems for the other remaining
appliance(s). See "Venting and Combustion Air Check" in this

section. This furnace MUST be vented to the outside.

When the installation is complete, check that all appliances have

adequate combustion air and are venting properly. See Venting

And Combustion Air Check in "Gas Vent Installation" Section in
this manual.

OutdoorCombustionAir Method

A space having less than 50 cubic feet per 1,000 BTUH (4.8 cubic

meters per kW) input rating for all gas appliances installed in the
space requires outdoor air for combustion and ventilation.

AirOpeningsand ConnectingDucts

1. Total input rating for all gas appliances in the space MUST be
considered when determining free area of openings.

2. Connect ducts or openings directly to the outdoors.

3. When screens are used to cover openings, the openings
MUST be no smaller than 1/4" (6.4mm) mesh.

4. The minimum dimension of air ducts MUST NOT be less than
3" (76.2mm).

10

Specifications are subject to change without notice

44001 102404

5. When sizing a grille, louver, or screen use the free area of
opening. If free area is NOT stamped or marked on grill or

louver, assume a 20% free area for wood and 60% for metal.
Screens shall have a mesh size not smaller than 1/4" (6.4mm).

Requirements

1. Provide the space with sufficient air for proper combustion and

ventilation of flue gases using horizontal or vertical ducts or

openings.

Outside Air (This is ONLY a guide. Subject to codes of country having jurisdiction.)

This installation NOT approved in Canada GasVen_

GasVent

OutletAir(1) SoffitVent f ....... "_" Ai_';1; I II 3| II II

% ............... II It1 II II

2d= _ m I I _1TM J I I I I II II

I--I / 0utletA,r_,_ I1 I ,ir , ,..,tL

GableVent j_ _i_r "_

_ alternat"_eInlet Air 11) A/ GableVent _ _ I'r-"li "''" "" "" "" "" ' " " " "" _)_",,,

' _ Ga Ven _ -- J II II rl II Outlet

I-" _ _ f'VentilatedAttic_ n.tlp_4 II _ _ Air(21

lOp ADOVe insulation _ _ / I rum, J.t I I I I

• SoffitVent Inlet Inlet

M / % II I

r_l , _ I I -- ,-_ II I MinimumOnelnletandOneOutletAirSupplyisRequired

_ _ ,.,^, / I ...... I,_1 I I I Inlet Air Opening must be within 12" (304.8mm)offloor

VentilatedCrawl_ '_'.'=' _1-..I I._Z.%J _ Inl t

alternateInletAir (1)

c. Horizontal duct openings require 1 square inch of free

area per 2,000 BTUH (11 cm2/kW) of combined input for
all gas appliances in the space (see Table 1).

d. Vertical duct openings or openings directly

communicating with the outdoors require 1 square inch
of free area per 4,000 BTUH (5.5 cm2/kW) for combined

input of all gas appliances in the space (see Table 1).

3. When one permanent outdoor opening is used, the opening
requires:

a. 1 sq. in of free area per 3,000 BTUH (7 cm2/kW) for

combined input of all gas appliances in the space (see

Table 1) and

b. not less than the sum of the areas of all vent connectors

in the space.

The opening shall commence within 12" (304.8mm) of the top of
the enclosure. Appliances shall have clearances of at least 1"

(25.4mm) from the sides and back and 6" (152.4mm) from the

front. The opening shall directly communicate with the outdoors or

', I I I I H I May be in any CombinationShown

A,r(1) _ 1"_°7 _ _ All(2) Outlet Air Openingmustbewithin 12" (304.8mm)ofceiling

2.

Figure 6 illustrates how to provide combustion and ventilation
air when two permanent openings, one inlet and one outlet,

are used.

a. One opening MUST commence within 12" (304.8mm) of

the floor and the second opening MUST commence

within 12" (304.8mm) of the ceiling.

b. Size openings and ducts per Table 1.

(1) 1SquareInch per4000 BTUH
(2) 1SquareInch per2000 BTUH

shall communicate through a vertical or horizontal duct to the
outdoors or spaces (crawl or attic) that freely communicate with

the outdoors.

4. Combination of Indoor and Outdoor Air shall have:

a. Indoor openings that comply with the

Indoor

Combustion Air Method below and

b.

Outdoor openings located as required in the Outdoor
Combustion Air Method above and

c.

Outdoor openings sized as follows.

1) Calculate the Ratio of all Indoor Space volume
divided by required volume for Indoor Combustion Air

Method.

2) Outdoor opening size reduction Factor is I minus the
Ratio in 1) above.

3) Minimum size of Outdoor openings shall be the size
required in Outdoor Combustion Air Method above
multiplied by reduction Factor.

Free Area

BTUH(kW)

Input

Rating

40,000 (11.72)
50,000 (14.65)

60,000 (17.58)
75,000 (21.98)

80,000 (23.45)

100,000 (29.31)
125,000 (36.63)

EXAMPLE: Determining Free Area

Furnace Water Heater
100,000 + 30,000

29.31 8.8

Furnace Water Heater
100,000 + 30,000

29.31 8.8

44001 102404

TwoHorizontalDucts

sq.in./2,000(1cm2/.09)

20sq. in.(129 cmz)
25sq. in.(161 cmz)

30sq.in. (194cmz)

37.5sq.in. (242cmz)
40sq. in.(258 cmz)

50sq. in.(322 cmz)

62.50sq.in. (403cmz)

BTUH(kW)

MinimumFreeAreaRequiredfor EachOpeningor Ductto Outdoors

SingleOpening

BTUH(kW)

sq.in./3,000(1cm2/.135)

13.34sq.in. (86 cmz)

16.7sq.in. (108cmz)

20sq. in.(129cmz)
25sq. in.(161cmz)

26.7sq.in. (172cmz)

33.3sq.in. (215cmz)

41.7sq.in. (269cmz)

TwoVerticalDuctsor Openings

sq.in./4,000(1cm2/.18)

10sq.in. (65cmz)

12.5sq.in. (81cmz)
15sq.in. (97cmz)

18.75sq.in. (121 cmz)
20sq. in,(129cmz)

25sq. in,(161cmz)

31.25sq.in. (202cmz)

Total Input

(130,000+ 4,000)

(38.11+ .18)

= 32.5 S_ In. Vertical
= 210 cm_ Vertical

Total Input

(130,000+ 2,000)

(38.11 + .09)

Specifications are subject to change without notice

= 65 Sq. In. Horizontal
= 423 cm2 Horizontal

BTUH(kW)

RoundDuct

BTUH(kW)

sq.in./4,000(6.5cm2/.18)

4" (101.6mm)
4" (101.6mm)

4" (101.6mm)

5" (127mm)
5" (127mm)

6" (152.4mm)
7" (177.8mm)

IndoorCombustionAir

CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in

personal injury or death.
Most homes will require additional air from

outdoors for combustion and ventilation. A space

with at least 50 cubic feet per 1,000 BTUH (4.8 cubic

meters per kW) input rating or homes with tight
construction may need outdoor air, supplied

through ducts, to supplement air infiltration for

proper combustion and ventilation of flue gases.

standard method permits indoor air to be used for combustion and

ventilation air.
The Known Air Infiltration Rate Method shall be used if the

infiltration rate is known to be less than 0.40 air changes per hour
(ACH) and equal to or greater than 0.10 ACH. Infiltration rates
greater than 0.60 ACH shall not be used. The minimum required

volume of the space varies with the number of ACH and shall be

determined per Table 2 or Equations 1 and 2. Determine the
minimum required volume for each appliance in the space, and

add the volumes together to get the total minimum required

volume for the space.

CARBON MONOXIDE POISONING HAZARD

Standardand Known-Air-lnfiltrati0n Rate Methods

© NFPA &AGA

Indoor air is permitted for combustion and ventilation, if the
Standard or Known-Air-Infiltration Rate Method is used.

The Standard Method may be used, if the space has no less
volume than 50 cubic feet per 1,000 BTUH (4.8 cubic meters per

kW) input rating for all gas appliances installed in the space. The

i' MINIMUM SPACE VOLUME FOR 100% COMBUSTION AND VENTILATION AIR FROM INDOORS

OtherThanFan-AssistedTotal Fan-assistedTotal

30,000BTU 40,000BTU 50,000BTU 50,000BTU 75,000BTU 100,000BTU 125,000BTU

ACH (8,790kW) (11,720kW) (14,650kW) (14,650kW) (21,975kW) (29,300kW) (36,625kW)

0.60 1,050(29.7) 1,400(39.2) 1,750(49) 1,250(35) 1,875(52.5) 2,500(70) 3,125(87.5)

0.50 1,260(35.3) 1,680(47.04) 2,100(58.8) 1,500(42) 2,250(63) 3,000(84) 3,750(105)

0.40 1,575(44.1) 2,100(58.8) 2,625(73.5) 1,875(52.5) 2,813(78.8) 3,750(105) 4,688(131.3)

0.30 2,100(58.8) 2,800(78.4) 3,500(98) 2,500(70) 3,750(105) 5,000(140) 6,250(175)

0.20 3,150(88.2) 4,200(117.6) 5,250(147) 3,750(105) 5,625(157.5) 7,500(210) 9,375(262.5)

0.10 6,300(176.4) 8,400(235.2) 10,500(294) 7,500(210) 11,250(315) 15,000(420) 18,750(525)

0.00 NP NP NP NP NP NP NP

ACH = Air Changes per Hour

NP = Not Permitted

Table 2 Minimum Space Volumes were determined by using the
following equations from the National Fuel Gas Code ANSI

Z223.1/N FPA 54-2009, 9.3.2.2:

1. For appliances other than fan-assisted appliances (such
as a draft hood-equipped water heater), calculate using the

following equation:

Required Volume other _ 21ft3 ( |°ther )

ACH 1000 BTU H

! \

Required Volume other _ 59 m3 _ [ other )

ACH .293 kW

2. For fan-assisted appliances (such as this furnace),
calculate using the following equation:

RequiredVolume fan_ 15ft3 ( |fan )

ACH 1000 BTU H

! \

RequiredVolume fan _ .42 m3 _ [ fan )

ACH .293 kW

12

Specifications are subject to change without notice

Failure to follow this warning could result in
personal injury or death.

An unconfined space or homes with tight

construction may not have adequate air infiltration

for proper combustion and ventilation of flue gases.

Most homes will require additional air.

ft3(m3)

where:

I other= all appliances other than fan-assisted input in BTUH

I fan = fan-assisted appliance input in BTUH

AOH = air change per hour (percent of volume of space

exchanged per hour, expressed as a decimal)

3. For purposes of this calculation, an infiltration rate greater

than 0.60 ACH shall not be used in the equations above.
The following requirements apply to the Standard Method and to

the Known Air Infiltration Rate Method.

* Adjoining rooms can be considered part of a space, if there

are no ctosable doors between rooms.
Combining spaces on the same story. Each opening shall

have a minimum free area of at least 1 in.2/1,000 BTUH (22
cm2/kW) of the total input rating of all appliances in the space
but not less than 100 in.2 (645 cm2). One opening shall
commence within 12 in. (304.8 mm) of the top, and one
opening shall commence within 12 in. (304.8 mm) of the

bottom, of the enclosure. The minimum dimension of air
openings shall not be less than 3 in (76.2 mm).

Combining spaces indifferent stories. The volumes of spaces
on different stories shall be considered as communicating

spaces where such spaces are connected by one or more

44001 102404

openings in doors or floors having a total minimum free area
of 2 in.2/1,000 BTUH (44 cm2/kW) of total input rating of all

appliances.

An attic or crawl space may be considered a space that freely

communicates with the outdoors provided there are adequate

ventilation openings directly to outdoors. Openings MUST

remain open and NOT have any means of being closed off.

Ventilation openings to outdoors MUST be at least 1 square

inch of free area per 4,000 BTUH (5.5 cm2/kW) of total input
rating for all gas appliances in the space.

In spaces that use the Indoor Combustion Air Method,
infiltration should be adequate to provide air for combustion,

ventilation and dilution of flue gases. However, in buildings

with unusually tight construction, additional air MUST be
provided using the methods described in section titled

Outdoor Combustion Air Method:

* Unusually tight construction is defined as Construction with:

1. Walls and ceilings exposed to the outdoors have a
continuous, sealed vapor barrier. Openings are
gasketed or sealed and

2. Doors and openable windows are weather stripped and

3. Other openings are caulked or sealed. These include

joints around window and door frames, between sole

plates and floors, between wall-ceiling joints, between
wall panels, at penetrations for plumbing, electrical and

gas lines, etc.

VentilationAir

Some provincial codes and local municipalities require ventilation
or make-up air be brought into the conditioned space as
replacement air. Whichever method is used, the mixed return air

temperature across the heat exchanger MUST not fall below 60°

so that flue gases wilt not condense excessively in the heat
exchanger. Excessive condensation will shorten the life of the heat

exchanger and possibly void your warranty.

VentingandCombustionAir Check

Vent Check

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

T, ca:P e DratH°°O

Water Heater /' \ _ _,<.___ Match

If flame pulls towards draft hood, this indicates sufficient
venting.

NOTE: When an existing Category I furnace is removed or
replaced, the original venting system may no longer be sized to

properly vent the attached appliances, and to make sure there is
adequate combustion air for all appliances, MAKE THE

FOLLOWING CHECK,

CARBON MONOXIDE POISONING HAZARD

Failure to follow the steps outlined below for each

appliance connected to the venting system being

placed into operation, could result in carbon
monoxide poisoning or death:

The following steps shall be followed for each
appliance connected to the venting system being

placed into operation, while all other appliances
connected to the venting system are not in
operation:

1. Seal any unused openings in the venting system.

2. Inspect the venting system for proper size and horizontal
pitch, as required in the National Fuel Gas Code, ANSI

Z223.1/NFPA 54 or CSA B149.1, Natural Gas and
Propane Installation Code and these instructions. Deter-

mine that there is no blockage or restriction, leakage,
corrosion and other deficiencies which could cause an

unsafe condition.

3. As far as practical, close all building doors and windows
and all doors between the space in which the appliance(s)
connected to the venting system are located and other
spaces of the building.

4. Close fireplace dampers.

5. Turn on clothes dryers and any appliance not connected
to the venting system. Turn on any exhaust fans, such as

range hoods and bathroom exhausts, so they are

operating at maximum speed. Do not operate a summer
exhaust fan.

6. Follow the lighting instructions.Place the appliance being
inspected into operation. Adjust the thermostat so

appliance is operating continuously.

7. Test for spillage from draft hood equipped appliances at

the draft hood relief opening after 5 minutes of main burn-
er operation. Use the flame of a match or candle.

(Figure 7)

8. If improper venting is observed, during any of the above

tests, the venting system must be corrected in
accordance with the National Fuel Gas Code, ANSI

Z223. 1/NFPA 54 and/or CSA B149. 1, Natural Gas and
Propane Installation Code.

9. After it has been determined that each appliance
connected to the venting system properly vents when
tested as outlined above, return doors, windows, exhaust
fans, fireplace dampers and any other gas-fired burning
appliance to their previous conditions of use.

ForTwoPipeInstallation

This furnace can NOT be common vented or connected to any
type B, BW or L vent or vent connector, nor to any portion of a
factory-built or masonry chimney. If this furnace is replacing a

previously common-vented furnace, it may be necessary to resize
the existing vent and chimney to prevent oversizing problems for
the other remaining appliance(s). See "Venting and Combustion

Air Check" in this section. This furnace MUST be vented to the

outside.

44001 102404

13

Specifications are subject to change without notice

Vent and Combustion Air Piping

CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in

personal injury or death.
Use methods described here to provide combustion

and ventilation air.

SinglePipe(N9MP1 Models)

This furnace is certified as a Category _V appliance. This furnace

requires ventilation openings to provide air for proper combustion
and ventilation of flue gases. All duct or openings for supplying
combustion and ventilation air must comply with the gas codes or
in absence of local codes, the applicable national codes.

When the installation is complete, see the "Venting and

Combustion Air Check" in this manual.

DualCertified (NgMP2,NgMPDand *gMPD
Models)

This furnace is certified as a Category _V appliance. This furnace

can be installed as a direct vent furnace using outside air for
combustion or the furnace can use air from inside the structure for

combustion. The INLET air pipe is optional. If combustion air
comes from inside the structure, adequate make up air MUST be
provided to compensate for oxygen burned. See Confined Space

Installation in the Combustion and Ventilation Air chapter. If

combustion air is drawn from outside the structure, it MUST be

taken from the same atmospheric pressure zone as the vent pipe.

Contaminated Combustion Air

Installations in certain areas or types of structures will increase the
exposure to chemicals or halogens that may harm the furnace.

The following areas or types of structures may contain or have

exposure to the substances listed below. The installation must be
evaluated carefully as it may be necessary to provide outside air

for combustion.

• Commercial buildings.

• Buildings with indoor pools.

• Furnaces installed in laundry rooms.

• Furnaces installed in hobby or craft rooms.

• Furnaces installed near chemical storage areas.

• Permanent wave solutions for hair.

• Chlorinated waxes and cleaners.

• Chlorine based swimming pool chemicals.

• Water softening chemicals.

• De-icing salts or chemicals.

• Carbon tetrachloride.

• Halogen type refrigerants.

• Cleaning solvents (such as perchloroethylene).

• Printing inks, paint removers, varnishes, etc.

• Hydrochloric acid.

• Sulfuric Acid.

• Solvent cements and glues.

• Antistatic fabric softeners for clothes dryers.

• Masonry acid washing materials.

Ventand CombustionAir PipingGuidelines

This furnace is approved for venting with Schedule 40 PVC,

CPVC, ABS fittings, and Cellular Core and SDR-26 PVC pipe.

ApplicableASTM Standards for Vent Materials

Sch.40 SDR Cell Solv.

Materials Pipe Pipe Core Fittings Primer Cement

ABS D1527 F628 & -- D2235

PVC D1785 D2241 F891 & F656 D2564

CPVC F44t F442 -- F438 -- F493

ABS to

PVC

NOTE: 1) In Canada, all pipe, fittings & cements must conform to

applicable CSA standards or to local codes having jurisdiction.

the specific venting material.

solvent cement that meets the requirements of ASTM D3138.

cementing plastic pipe and fittings.

NOTE: In order to create a seal that allows future removal of pipe,

RTV sealant MUST be used on the inlet pipe where itjoins to the
furnace.

NOTE: All vent piping MUST be installed in compliance with local

codes or ordinances, these instructions, good trade practices, and

codes of country having jurisdiction.

1. Determine the best routing and termination for the vent pipe

2. Determine the size required for the vent pipe and air inlet

3. Loosely assemble all venting parts without adhesive (pipe

4. Furnace shall be installed so as to prevent the accumulation

5. Use of vertical piping is preferred because there will be

6. The vertical vent pipe MUST be supported so that no weight

7. Exhaust vent piping or air inlet piping diameter MUST NOT

8. All exhaust vent piping from the furnace to termination

9. Use DWV type long radius elbows whenever possible, as

10. All horizontal pipe runs MUST be supported at least every

.......... D3138

2) Only use solvent cements that are marked for use with

3) ABS to PVC transition joints REQUIRE a special

4) Refer to ASTM D2855 for general procedure to use for

and air inlet pipe by referring to all of the instructions and
guidelines in this Section.

pipe.

joint cement) for correct fit before final assembly.

of condensate.

some moisture in the flue gases that may condense as it
leaves the vent pipe (See Instruction For Horizontal Vents).

is allowed to rest on the combustion blower.

be reduced.

MUST slope upwards. A minimum of 1/4" per foot per

(6.4mm per 304.8mm) of run is required to properly return

condensate to the furnace drain system.

they provide for the minimum slope on horizontal runs and
they provide less resistance in the vent system. If DWV
elbows cannot be used, use two, 45° elbows when possible.
On horizontal runs the elbows can be slightly misaligned to
provide the correct slope.

five feet with galvanized strap or other rust resistant
material. NO sags or dips are permitted.

Pipe

D2468

D2661

D2466
D2665

14

Specifications are subject to change without notice

44001 102404

11. All vertical pipe runs MUST be supported every six feet
(1.Sm) where accessible.

12. The minimum vent length is 5' (1.5m) of PVC.

13. The piping can be run in the same chase or adjacent to
supply or vent pipe for water supply or waste plumbing. It

can also be run in the same chase with a vent from another
90+ furnace.

NOTE: In NO case can the piping be run in a chase where

temperatures can exceed 140 ° F(60°C). or where radiated

heat from adjacent surfaces would exceed 140° F(60°C).

14. The vent outlet MUST be installed to terminate in the same
atmospheric pressure zone as the combustion air inlet.

15. The vent system can be installed in an existing unused
chimney provided that:

* Both the exhaust vent and air intake run the length of the

chimney.

* No other gas fired appliance or fireplace (solid fuel) is

vented into the chimney.

* The top of the chimney MUST be sealed flush or crowned

up to seal against rain or melting snow so ONLY the piping
protrudes.

* The termination clearances shown in Figure 8 & Figure 9

are maintained.

16. Furnace applications with vertical vents requiring vent
diameter increaser fittings must have increaser fittings
installed in vertical portion of the vent. Condensate will be

trapped in the vent ifthe vent diameter is increased prior to

having an elbow turned upward. This could cause nuisance

tripping of the pressure switch.

Combustion Air and Vent Piping Insulation
Guidelines

NOTE: Use closed cell, neoprene insulation or equivalent. If
Fiberglass or equivalent insulation is used it must have a vapor

barrier. Use R values of 7 up to 10' (3.1m), R-11 if exposure
exceeds 10'(3.1 m). If Fiberglass insulation is used, exterior to the
structure, the pipe MUST be boxed in and sealed against

moisture.

1. When the vent or combustion air pipe height above the roof
exceeds 30" (762mm) or if an exterior vertical riser is used
on a horizontal vent to get above snow levels, the exterior
portion MUST be insulated.

2. When combustion air inlet piping is installed above a
suspended ceiling, the pipe MUST be insulated with

moisture resistant insulation such as Armafiex or other
equivalent type of insulation.

3. Insulate combustion air inlet piping when run in warm,
humid spaces.

SizingCombustionAir andVent Pipe

Consult Table 3 or Table 4 to select the proper diameter exhaust
and combustion air piping. Exhaust and combustion air piping is

sized for each furnace Btuh size based on total linear vent length
(on inlet or outlet side), and number of 90° elbows required. Two

45° elbows can be substituted for one 90 ° elbow. The elbow or
elbows used for vent termination outside the structure ARE

counted, including elbows needed to bring termination above
expected snow levels. The elbow inside the furnace on the

N9MPD and *9MPD IS NOT included in the count.

44001 102404

Specifications are subject to change without notice

Pipe Diameter Table

N9MP1, N9MPD & *9MPD Models

40,000, 50,000, 60,000, 75,000 & 80,000 Btuh Furnaces

40' (12.2m) & (5) 90° elbows with 2" (50.8mm) PVC pipe or

70' & (5) 90° elbows with3" (76.2mm) PVC pipe

100,000 Btuh Furnace

40' (12.2m) & (5) 90° elbows with 3" (76.2mm) PVC pipe or

70' & (5) 90° elbows with3" (76.2mm) PVC pipe &

Long Vent Kit (SeeTech. Manual)

125,000 Btuh Furnace

40' & (5) 90° elbows with3" (76.2mm) PVC pipe

The minimum vent length is 5' (1.5m)of PVC. Elbows are DWV
Long Radius Type for 2" (50.Smm)and 3" (76.2mm)vents.

If more than five elbows are required, REDUCE the length of
both the inlet and exhaust pipes 5' (1.5m) for each additional
elbow used. If less than five elbow are required, the length

can be INCREASED by 5' (1.5m) for each additional elbow
NOT used.

NOTE: It is allowable to use larger diameter pipe and fitting than
shown in the tables but not smaller diameters than shown.

Pipe Diameter Table

N9MP2 Models

50,000 & 80,000 Btuh Furnaces

40' (12.2m) & (5) 90° elbows with2" (50.8mm) PVC pipe or

70' (21.3m)& (5) 90° elbows with3" (76.2mm) PVC pipe

75,000 Btuh Furnaces

25' & (3)90° elbows with 2" (50.8mm) PVC pipeor

40' (12.2m) & (5) 90° elbows with2" (50.Smm)PVC pipe &

70' (21.3m)& (5) 90° elbows with3" (76.2mm) PVC pipe

40' (12.2m) & (5) 90° elbows with3" (76.2mm) PVC pipe or

70' (21.3m) & (5) 90° elbows with3" (76.2mm)PVCpipe &

40' (12.2m)& (5) 90° elbows with3" (76.2mm) PVC pipe

The minimum vent length is 5' (1.5m)of PVC. Elbows are DWV
Long Radius Type for 2" (50.Smm)and 3" (76.2mm) vents.

If more than five elbows are required, REDUCE the length of
both the inlet and exhaust pipes 5' (1.5m) for each additional
elbow used. If less than five elbows are required, the length
can be INCREASED by 5' (1.5m) for each additional elbow

NOT used.
NOTE: It is allowable to use larger diameter pipe and fitting than

shown in the tables but not smaller diameters than shown.
For concentric vent pipe diameter see Concentric

Termination tables in this manual.

LongVent Kit (See Tech. Manual) or

100,000 Btuh Furnace

Long Vent Kit (SeeTech. Manual)

125,000 Btuh Furnace

VentTerminationClearances

CARBON MONOXIDE POISONING.

Failure to follow this warning could result in
personal injury or death.

Inlet and outlet pipes may NOT be vented directly

above each other.

1. Determine termination locations based on clearances
specified in following steps and as shown in Figure 8,

Figure 9, Figure 22, through Figure 24.

For concentric vent termination clearances, refer to

Concentric Termination Kit instructions,

2. For Single Pipe Installation, models N9MP1, N9MP2,
N9MPD or *9MPD, refer to Figure 9 for vent termination

clearances.

3. For Direct Vent Installation, models N9MP2, N9MPD or
*9MPD, refer to Figure 8 for vent termination clearances.

15

Direct Vent Termination Clearance

D VENTTERMINAL \\\\\

Item ClearanceDescription CanadianInstallation (1) U.S.Installation (2)

A Clearanceabove grade,veranda,porch, deck,balcony,or 12" (30cm)# 12" (30 cm)

anticipatedsnowlevel

B Clearanceto awindowor doorthat may be opened 12" (30 cm)for appliances > 10,000Btuh (3kW)and _< 9" (23 cm)for appliances > 10,000Btuh(3 kW)and -< 50,000

C Clearanceto a permanentlyclosedwindow * *
D Verticalclearanceto aventilatedsoffitlocatedabovethe * *

terminalwithin a horizontaldistance of 2' (61cm)from the
centerlineofthe terminal

E Clearanceto an unventilatedsoffit *
F Clearanceto an outsidecorner *

G Clearanceto an insidecomer *

H Clearanceto each sideof the centerlineextendedabove 3' (91 cm) within 15' (4.5 m) abovethe meter/regulator *

electricalmeteror gasservice regulatorassembly assembly

I Clearanceto serviceregulatorvent outlet 3' (91 cm)

J Clearanceto non-mechanicalair supplyinletto building or 12" (30 cm)forappliances > 10,000Btuh (3kW) and < 9" (23 cm)for appliances > 10,000Btuh(3 kW)and _<

thecombustionair inlettoany other appliance 100,000Btuh (30kW), 36" (91 cm)forappliances > 50,000Btuh(15 kW),12" (30cm)for appliances> 50,000

K Clearanceto a mechanicalair supplyinlet 6' (1.83 m) 3' (91 cm) aboveif within 10' (3m) horizontally
L Clearanceunder averanda,porch, deck,or balcony 12" (30 cm)+

M Clearanceto each side ofthe centerlineextendedaboveor 12" (30cm) 12" (30cm)

belowventterminal of thefurnace to adryer or water heater
vent,orother appliance'sdirectvent intake orexhaust.

N Clearanceto the vent terminal of a dryervent, water heater 3' (91 cm) 3' (91 cm)

O Clearancefroma plumbingventstack 3' (91 cm) 3'(91 cm)

P Clearanceabove a pavedsidewalkor paveddrivewayIo- 7' (2.13m) ** *

catedon publicproperty.

> greaterthan, _>greaterthan orequalto, < lessthan, _ lessthanor equalto
(1.) In accordancewiththe currentCSAB149.1, NaturalGas and PropaneInstallationCode
(2.) In acccrdancewith the currentANSI Z223.1/NFPA54,NationalFuel GasCode
# 18" (46cm)aboveroof surface

+ Permittedonly if veranda,porch,deck,or balconyis fully openon a minimumof two sides beneaththe floor.

Forclearancesnotspecifiedin ANSIZ223.1/NFPA54 or CSAB149.1,clearancesshallbe in accordancewith localinstallationcodesand

the requirementsofthe gas supplierandthe manufacture'sinstallationinstructions.

** A ventshall not terminatedirectly abovea sidewalkorpaved drivewaythat islocated betweentwo singlefamily dwellingsand servesboth dwellings.

Notes:

1. The ventfor this applianceshall notterminate
a. Overpublicwalkways;or

b. Near soffitvents orcrawlspace ventsor otherareas where condensateorvapor could createa nuisanceorhazardor propertydamage;or

c. Wherecondensatevapor cculd causedamageor could be detdmentalto theoperationofregulators,reliefvalves, or otherequipment.

2. When locatingventterminations,considerationmustbe givento prevailingwinds,location,andother conditionswhich maycauserecirculationofthe combustionproductsof adjacentvents.

Recirculationcan causepoor combustion,inletcondensateproblems,and acceleratedcorrosionofthe heat exchangers.

3. Avoid ventingundera deck orlarge overhang.Recirculationcould occurand cause performanceorsystemproblems.

(X] AIR SUPPLY INLET

100,000Btuh(30 kW),36" (91 cm)for appliances > 100,000 Btuh(14.7 kW), 12" (30cm) for appliances > 50,000Btuh (14.7
Btuh(30 kW) kW)

100,000Btuh (30kW) Btuh(14.7 kW)

E_ AREA WHERE TERMINAL IS NOT PERMITED

16 44001 102404

Specifications are subject to change without notice

Other than Direct Vent Termination Clearance

I lv

//,v //'

/

/

'_ VENTTERMINAL _ E_ AREAWHERETERMINALISNOTPERMITED

Item ClearanceDescriptions CanadianInstallation(1) U.S.Installation(2)

A Clearanceabove grade,veranda,porch, deck,balcony,or 12" (30cm)# 12" (30 cm)

anticipatedsnowlevel

B Clearanceto awindowor doorthat may be opened 12" (30 cm) forappliances > 10,000Btuh (3kW)and _< 4'(1.2 m)belowortothesideoftheopening, l'(30cm)above

C Clearanceto a permanentlyclosedwindow * *
D Verticalclearanceto aventilatedsoffitlocatedabovethe *

terminalwithin a horizontaldistance of 2' (61cm)from the
centerlineofthe terminal

E Clearanceto an unventilatedsoffit * *
F Clearanceto an outsidecorner •

G Clearanceto an insidecomer * *

H Clearanceto each sideof the centerlineextendedabove 3' (91 cm) within 15' (4.5 m) abovethe meter/regulator 3' (91 cm) within15' (4.5m) above the meter/regulator

electricalmeteror gasservice regulatorassembly assembly assembly

I Clearanceto serviceregulatorvent outlet 3' (91 cm) *

J Clearanceto non=mechanicalairsupplyinletto building or 12" (30 cm)for appliances > 10,000Btuh (3kW) and < 4' (1.2m)below or tothe side ofopening:1' (30 cm)above

thecombustionair inlettoany other appliance 100,000Btuh (30kW), 36" (91 cm)forappliances > opening.

K Clearanceto a mechanicalair supplyinlet 6' (1.83 m) 3' (91 cm) aboveif within 10' (3m) horizontally
L Clearanceunder averanda,porch, deck,or balcony 12" (30cm)+ *

M Clearanceto each side ofthe centedineextendedaboveor * *

belowventterminal of thefurnace to adryer or water heater
vent,orother appliance'sdirectvent intake orexhaust.

N Clearanceto the vent terminal of a dryervent, water heater * *

O Clearancefroma plumbingventstack * *

Clearanceabove a paved sidewalkor paveddrivewaylo-

P 7' (2.13 m) _-k 7' (2.13m)

catedon publicproperty.

> greaterthan, _>greaterthan orequalto, < lessthan, < lessthanor equalto
(1.) In accordancewiththe currentCSAB149.1, NaturalGas and PropaneInstallationCode
(2.) In accordancewiththe currentANSIZ223.1/NFPA54, NationalFuel Gas Code
# 18" (46cm)aboveroof surface

+ Permittedonly if veranda,porch,deck,or balconyis fully openon a minimumof two sides beneaththe floor.

FordearancesnotspecifiedinANSIZ223.1/NFPA54orCSAB149.1,dearancesshallbein accordancewithlocalinstallationcodesandtherequirementsof thegas supplierandthemanufacture'sinstallation
instructions.

_* A ventshall notterminatedirectly abovea sidewalkor paved drivewaythat islocated betweentwo singlefamily dwellingsand servesboth dwellings.

Notes:

1. The ventfor this applianceshall notterminate
a. Overpublicwalkways;or

b. Near soffitvents orcrawlspace ventsor otherareas where condensateorvapor could createa nuisanceorhazardor propertydamage;or
c. Wherecondensatevapor couldcause damageor couldbe detdmentalto the operation ofregulators,reliefvalves, or otherequipment.

2. When locatingventterminations,considerationmustbe givento prevailingwinds,location,andother conditionswhich maycauserecirculationofthe combustionproductsof adjacentvents.

Recirculationcan causepoor combustion,inletcondensateproblems,and acceleratedcorrosionofthe heat exchangers.

3. Avoid ventingundera deck orlarge overhang.Recirculationcould occurand cause performanceorsystemproblems.

AIR SUPPLY INLET

100,000Btuh(30 kW),36" (91 cm)for appliances > 100,000 the opening.
Btuh(30 kW)

100,000Btuh (30kW)

44001 102404 17

Specifications are subject to change without notice

CondensateDrainTrap

This furnace removes both sensible and latent heat from the

products of combustion. Removal of the latent heat results in

condensation of the water vapor. The condensate is removed from
the furnace through the drains in the plastic transition and the vent
fitting. The drains connect to the externally mounted condensate

drain trap on the left or right side of the furnace.
The startup of a new furnace will involve a cycle or two of the

furnace to properly prime the condensate trap with water. Until the
trap is fully primed, some condensate wilt be pulled into the

combustion blower. The furnace may cycle on the pressure switch

connected to the plastic transition box due to condensate buildup.
After the trap is primed, the condensate will start draining from the

furnace. The combustion blower will clear out any remaining

condensate in the blower housing through the vent fitting

downstream of the blower. Note that the condensate trap can also

be primed by pouring water into the 1/2" (12.7mm) drain hose.

Remove the1/2" (12.7mm) ID drain hose from either the gutter or
the white PVC tee trap. Using a funnel pour eight (8) ounces (236

ml) of water into 1/2" (12.7mm) ID drain hose. Water will flow
through the drain hose and into the condensate drain trap. This will

prime both the vent and the transition sides of the trap. Reconnect
the 1/2" (12.7mm) ID drain hose to the original component, either
the gutter or the PVC tee trap.

The condensate drain trap supplied with the furnace MUST be

used. The drain connection on the condensate drain trap is sized
for 3/4" (19.1mm) PVC or CPVC pipe, however alternate 1/2"

(12.7mm) CPVC [nominal 5/8" (15.gmm) O.D.] or vinyl tubing with

a minimum inner diameter (I.D.) of 5/8" (15.9mm) may also be

used, as allowed by local codes. Alternate drain pipes and hoses

may be used as allowed by local codes.
The drain line must maintain a 1/4" (6.4mm) per foot downward

slope toward the drain. 1/4" (6.4mm) per foot is recommended.

Installation of an overflow line is recommended when the 1/4"

(6.4mm) per foot slope to the condensate drain cannot be

maintained. A drain tube retainer clip is included in the furnace to

prevent kinking/buckling of the drain tube. The retainer clip should

remain in the furnace (between the door switch plate and the

blower shelf, Figure 10) during operation. See Figure 20 for

proper routing and installation of the overflow.

Drain Tube Retainer Clip Location

DO NOT trap the drain line in any other location than at the
condensate drain trap supplied with the furnace.

FROZEN AND BURST WATER PIPE HAZARD
Failure to follow this caution may result in property

damage.

If a condensate pump is installed, a plugged

condensate drain or a failed pump may cause the
furnace to shut down. Do not leave the home

unattended during freezing weather without turning
off water supply and draining water pipes or
otherwise protecting against the risk of frozen pipes.

If possible, DO NOT route the drain line where it may freeze. The
drain line must terminate at an inside drain to prevent freezing of

the condensate and possible property damage.

1.

A condensate sump pump MUST be used if required by
local codes, or if no indoor floor drain is available. The

condensate pump must be approved for use with acidic
condensate.

2.

A plugged condensate drain line or a failed condensate
pump will atlowcondensate to spill. If the furnace is installed
where a condensate spill could cause damage, it is
recommended that an auxiliary safety switch be installed to
prevent operation of the equipment in the event of pump
failure or plugged drain line. If used, an auxiliary safety
switch should be installed in the R circuit (low voltage)

ONLY.

3.

If the auxiliary switch in the condensate pump is used, the
furnace may shut down due to a blocked condensate line or
failed pump. To prevent frozen water pipes see the "Frozen
Water Pipe Hazard" section in this manual.

CondensateDrainTrap FreezeProtection

Special precautions MUST be made if installing furnace in an area
which may drop below freezing. This can cause improper
operation or damage to the equipment. If the the furnace
environment has the potential of freezing, the drain trap and drain
line must be protected. Use 3 to 6 watt per foot at 115 volt, 40° F
(4°C) self-regulating shielded and waterproof heat tape. Wrap the
drain trap and drain line with the heat tape and secure with the ties.
Follow the heat tape manufacturer's recommendations.

Drain
Tube

18

Blowe

rShelf

Door

Sw,,oh

Representative drawing only, some models may vary in appearance.

44001 102404

Specifications are subject to change without notice

Upflow Installations Top Vent

Plastic Caps (2)
Yellowor black

VentDrain
& Clamps

partsbag) ,,

CasingGrommet
BlackRubber

5/8"(15.9mm)ID - -
(Loosepartsbag)

/

i,,-- ,lb

\\

Coupling& Clamps
(Optional)

__ On Some ModelsONLY

I i

( \

__-

i_ =_ o_ , Single Pressure Switch

,

_> ReliefTube

/ f ........ _ _ BlackRubber3/16"

i

\ .... _ _ _I

StreetElbow

1/2" CPVC

(Looseparts bag)

j z- ....

.'f

/

\ i c> © i

,\ ', j

DrainLineVentTee3/4"
(18.1mm)PVCor1/2"(12.7mm)
CPVC(Fieldsupplied)

Representative drawing only, some models may vary in appearance,

DrainTubeBlackRubber5/8"(15,9mm)ID &
Clamps,Cutlengthto fit (Loosepartsbag)

25-24-80

Upflow Installations Top Vent (SeeFigure11)

Remove knockout from the side of the furnace casing where drain

tube will exit.

Install casing grommet [black rubber 5/8" (15.9mm) ID grommet -
in loose parts bag].

Install the 1/2" (12.7mm) CPVC street elbow on discharge of trap
Install the black PVC tube connector [ 3/4" (18.1mm) PVC x _/2"

(12.7mm) CPVC from loose parts bag] as shown in the illustration
above.

Cut the black drain tube [5/8" (15.9mm) ID - in loose parts bag] to
length to fit between trap and tube connector through grommet.

Clamp both ends of the drain tube using clamps provided.

NOTE: "PVC" is used as a generic term. Pipe and fitting materials used must be acceptable to the local code officials having

jurisdiction.

Glue the CPVC street elbow to the trap using appropriate cleaner
and solvent cement.

The field supplied 3/4" (18.1mm) PVC or 1/2" (12.7mm) CPVC

drain line vent tee must vent outside the furnace cabinet (see
exploded view above),

Note: It is recommended that all PVC piping and fitting
connections be fit up and inspected before final cementing. Trap
must be primed before operation, Verify all condensate drain

connections are securely clamped. A coupling and clamps (in
loose part bag) may be installed as shown for future servicing of

the vent system.

44001 102404 19

Specifications are subject to change without notice

Upflow Installations Vent through Left-Side

Plastic Cap

Yellowor black

Coupling& Clamps
(Optional) i

Either:ThePVC

VentDrain
& Clamps supplied 2"

DrainTeeorafield

(50.8mm)PVCTee

Dual Pressure Switch Detail \

_-_ TeeTrapWhite PVC

! DrainTube

i 1/2"(12,7mm)ID

r_ BlackRubber

DrainConnectorBlackPVC DrainTube

3/4" (19,1mm)PVCX1/2" Corrugated

(12,7mm)CPVC 5/8"(15,9mm)ID

(Loosepartsbag)\ ...... --_&Clamps

CasingGrommet / '\
BlackRubber

5/8"(15,9mm)ID
(Loosepartsbag)

\\\

(looseparts bag)

&Clamps

\

2" (50.8mm)PVC
Coupling

--\ i

,r7 _,- _-.

On SomeModels
ONLY

//

ii.L"

?'

/

/'

Single Pressure Switch

ReliefTube
BlackRubber3/16"

(4.8mm)ID

SIDE VIEW

5°to 10°

/

_uilt-inchannel will

beangled 5°to 10° also.

DrainLineVentTee3/4" (18,1mm)PVCor 1/2" '
(12,7mm)CPVC(Fieldsupplied)

Representative drawing only_some models may vary in appearance,

Upflow Installations Vent through Left-Side (SeeFigure12)

Remove drain tee from inducer discharge and remove black drain

tube 1/2" (12.7mm) ID from bottom of drain tee. (N9MPD and
*9MPD models only)

Install Vent Pipe grommet in side of casing.
Cut an appropriate length of 2" (50.8mm) PVC pipe long enough

to exit the cabinet and connect the vent drain to either:

• A standard field supplied 2" (50.8mm) PVC tee (N9MP1 or
N9MP2 models), or

• A 2" (50.8mm) PVC coupling fastened onto the drain tee
(N9MPD and *9MPD models)

Install tee trap into bottom of tee.
Remove knockout from the side of the furnace casing where drain

tube will exit.

Install the 1/2" (12.7mm) CPVC street elbow on discharge of trap

20

Specifications are subject to change without notice

Install the black PVC drain connector [3/4" (19.1mm) PVC x _/2"
CPVC from loose parts bag] as shown in the illustration above.

Cut the black drain tube [5/8" (15.9mm) ID - in loose parts bag] to
length to fit between trap and tube connector through grommet.

Clamp both ends of the drain tube using clamps provided.
Glue the CPVC street elbow to the trap using appropriate cleaner

and solvent cement.
Connect the tee trap and the main drain line exiting the casing as

shown in Figure 20.
Note: It is recommended that all PVC piping and fitting

connections be fit up and inspected before final cementing. Both
the internal trap and the external tee trap must be primed

before operation, Verify all condensate drain connections are
securely clamped. A coupling and clamps (in loose part bag) may

be installed as shown for future servicing of the vent system.

25-24-81

44001 102404

All Models Vent through Right-Side

/ ....... _ JYellow orblack _-'_-_1_

Past c Cap

/(_;_ _ \ _, OnSomeModels

, ...................--

,/_\ _ ONLY

__' Dual Pressure Switch

VentDrain , _ /:_
&Clamps _ \. j_\.-_l \_ J b_

/

/

/

• ii

DrainTube
Corrugated

5/8"(15,9mm)ID&
Clamps

SIDEVIEW

Rotate

downward

_._._ 5° to 10°

NOT_..Built-in channel will
be angled 5° to 10° also.

7%??

© o

Either:ThePVCDrain

Relief Tube
BlackRubber

3/16" (4.8ram)ID

Teeora fieldsupplied
2" (50.8mm)PVCTee

/'Single Pressure Switch Details

,/

/

/

I

,/

/

/'

/

!

TeeTrapWhitePVC

/(loose partsbag)

ElbowTubes(2) BlackRubber
1/2"(12.7mm)ID& Clamps

(loosepartsbag)

BarbedCoupling,1/2"(12.7mm)OD DrainLineVentTee3/4"

_ (loose partsbag) (18.1mm)PVCor1/2"

\ (12.7mm)CPVC(Fieldsup-

/ ', / plied)

/

/

DrainConnectorBlackPVC

(19.1mm)PVCX 1/2"
(12.7mm)CPVC
(Loosepartsbag)

/

-CasingGrommet

BlackRubber5/8"(15.9mm)CPVC
(Loosepartsbag) 25-24-68

All Models Vent through Right-Side (SeeFigure13)

Disconnect the black drain tube between the drain vent and the

trap.

Rotate the inducer 180° for a right side vent after loosening the 4
inducer attachment screws. Reinstall and retighten the inducer

screws to 20" pounds torque.
Using the _/2" (12.7mm) OD barbed coupling in the loose parts bag

connect together with the two short 1/2" (12.7mm) ID elbow tubes
and connect the lower discharge port of the vent drain to the trap.

Secure all connections with clamps.
Install the vent pipe grommet into the casing
Cut an appropriate length of 2" (12.7mm) PVC pipe long enough

to exit the cabinet and connect the vent drain to either:

• A standard field supplied 2" (12.7mm) PVC tee (N9MP1 or
N9MP2 models), or

• A 2" (12.7mm) PVC coupling fastened onto the drain tee
(N9MPD and *9MPD models)

Install tee trap into bottom section of tee.
Remove knockout from the side of the furnace casing where drain

tube will exit.

44001 102404

Specifications are subject to change without notice

Install casing grommet [5/8" (15.9mm) ID grommet -in loose parts
bag].

Install the _/2" (12.7mm) CPVC street elbow on discharge of trap
Install the black PVC tube connector [3/4" (19.1mm) PVC x _/2"

(12.7mm) CPVC from loose parts bag as shown in the illustration
above.

Cut the black drain tube[5/8 " (15.9mm) ID - in loose parts bag] to
length to fit between trap and tube connector through grommet.

Clamp both ends of the drain tube using clamps provided.
Glue the CPVC street elbow to the trap using appropriate cleaner

and solvent cement.
Connect the tee trap and the main drain line exiting the casing as

shown in Figure 20.
Note: It is recommended that all PVC piping and fitting

connections be fit up and inspected before final cementing. Both
the internal trap and the external tee trap must be primed

before operation, Verify all condensate drain connections are
securely clamped. A coupling and clamps (in loose part bag) may

be installed as shown for future servicing of the vent system.

21

Downflow Left-Side Vent and Trap

/ Plastic Cap

Yellowor black

Coupling& Clamps
(Optional)\

/

Vent Drain

&Clamps Either:ThePVC

DrainTeeorafield
supplied2"

(50.8mm)PVC_ee

Single Pressure Switch Detail "\

TeeTrapWhitePVC..... INLET* ':'/

(loosepartsbag)

_| ElbowTubeBlackRubber1/2'_.

//"

(12,7mm)ID&Clamps(Loose

PartsBag)

WARNING

MoveCapsto

topof trap

2" (50.8mm)PVC

//Coupling

/ DrainTube

Black Rubber 1/2"

(12.7mm)ID & Clamps

/

/ Dual PressureSwitch

SIDEVIEW

-°l°_rRotate downward
5° to10°

NOT inchannelwill
be angled 5°to 10" also.

ReliefTubeBlackRub-

. ._ ber3/16" (4.8mm)ID

iOn SomeModels

_,f-_ .... ONLY

INLET _'i _

FlexibleTubingConnector,3/16"
(4.8mm)OD (loosepartsbag)

ReliefTube,ExtensionBlack
Rubber,3/16" (4.8mm)ID Cutto
fit (loosepartsbag)

TrapConnection

"Clampears"

/ PointedOUT

DrainTubeBlack,5/8"(15.9mm)ID
CorrugatedCut atstraightsection

I

\

BarbedCoupling 1/2"(12.7mm)
OD (loosepartsbag)

Leaveroomforclamp "Cut Here

* Combustionair pipe (either side) for N9MP2, N9MPD& *9MPD downflow installation

Representative drawing only, some models may vary in appearance.

Downflow Left-Side Vent and Trap (SeeFigure14)

Remove the inducer mounting screws, rotate the inducer 180 °
and retighten the inducer screws to 20" pounds torque.
Disconnect the hoses from the trap assembly, and remove trap

and trap mounting bracket from the blower compartment. Using
cover plate and gasket provided in the loose parts bag, cover the

hole from the burner compartment to the blower compartment and
secure with screws.

Move the caps to the top of the trap and mount the trap externally

to the left side of the unit using the two screws provided.

Cut the 5/8" (15.9mm) ID corrugated hose as shown above and

fasten the 90° bend end to the trap and fasten the straight end to
the transition drain. Secure both connections with clamps.

Reconnect the 1/2" (12.7mm) ID drain hose from the vent drain to

the trap and secure with a clamp.. In some cases, additional

length will be required for this hose. Use the Black plastic 1/2"
(12.7mm) OD barbed coupling and a suitable section of 1/2"

(12.7mm) ID hose to make the connection. Secure all connections
with clamps

Connect the 3/16" (4.8mm) ID relief tube from the small port on the

trap to the top port of the transition as shown in the picture. In some

cases, additional hose length will be needed. Use the clear plastic

Preassemble&

insert intofurnace

3/16" (4.8mm) OD flexible tubing connector and a suitable length

25-24-69

of extra 3/18" (4.8mm) ID hose to make this connection.
Install the vent pipe grommet into the casing

Cut an appropriate length of 2" (50.8mm) PVC pipe long, enough

to exit the cabinet and connect the vent drain to either:

• A standard field supplied 2" (50.8mm) PVC tee (N9MP1 or
N9MP2), or

• A 2" (50.8mm) PVC coupling fastened onto the drain tee

(N9MPD and *9MPD models)

Install tee trap into bottom section of tee.
Remove knockout from the side of the furnace casing where drain

tube will exit.

Connect the tee trap and the main drain line exiting the casing as
shown in Figure 20.

Note: It is recommended that all PVC piping and fitting
connections be fit up and inspected before final cementing. Both

the external trap and the external tee trap must be primed
before operation, Verify all condensate drain connections are
securely clamped. A coupling and clamps (in loose part bag) may

be installed as shown for future servicing of the vent system.

22

Specifications are subject to change without notice

44001 102404

Downflow Right-Side Vent and Trap

or black

VentDrain
& Clamps

SIDE VIEW

'++i_ Rotatedownward

L 5° to 10°

NOTE Built-inchann;I will
be angled 5 ° to 10+ also.

Single Pressure Switch Detail

Cap

ElbowTubeBlackRubber
1/2"(12.7mm)ID& Clamps

(LoosePartsBag)

Barbed Coupling

1/2"(12.7mm)OD

", (LoosePartsBag)

Dual Pressure\Switch /

,,

Or

]it

TubeCorrugatedBlack, "\ ::

5/8

" llS.9mm)ID &Clamps

\

DrainConnectorBlaq

TrapConnection

ReliefTube
BlackRubber Preassemb]e&

31 ,, (4.8mm)ID insert into furnace

/16

Coupling&Clamps

+_ /(Optional)

BlackRubber
1/2"(12.7mm)In

CuttoFit&

DrainHose _////

Clamps

OnSome 2"(50.8mm)PVC

_ONLY Coupling

Models _

_Either: ThePVC

F DrainTeeorafield

(50.8mm)PVCTee

_ _/ _ l+ supplied2"

TeeTrapWhitePVC

+c

(loosepartsbag)

"Clampears"
PointedOUT

/

\ MoveCapsto

E

DrainTube)BlackRubber,5/8"

\.

., (15.9mm)IDCuttofit&Clamps

\--'j \?_;/ [_ (loosepartsbag) 25-24-69b

Representative drawingonly_some models may vary in appearance.

Downflow Right-Side Vent and Trap (SeeFigure15)

Remove the drain tee if installed. Cut an appropriate length of 2" (50.8mm) PVC pipe long, enough
Disconnect the hoses from the trap assembly, and remove trap to exit the cabinet and connect the vent drain to either:

and trap mounting bracket from the blower compartment. Using • A standard field supplied 2" (50.8mm) PVC tee (N9MP1 or
cover plate and gasket provided in the loose parts bag, cover the N9MP2 models), or

hole from the burner compartment to the blower compartment and • A 2" (50.8mm) PVC coupling fastened onto the drain tee
secure with screws. (N9MPD and *9MPD models)

Move the caps to the top of the trap and mount the trap externally Install tee trap into bottom section of tee.

to the right side of the unit using the two screws provided. Remove knockout from the side of the furnace casing where drain

Connect the corrugated drain tube from the transition box to the tube will exit.

trap as shown. If an extension isrequired, use the black PVC tube

connector and the black 5/8" (15.9mm) ID drain tube inthe loose
parts bag. Cut tube to length. Secure atl connections with clamps.

Connect the drain hose from the Vent Drain to the trap. If an
extension is required, use the black 1/2" (12.7mm) OD barbed
coupling, connect a black 1/2" (12.7mm) ID elbow tube and a

suitable section of a 1/2" (12.7mm) ID drain tube to make
connection from the vent drain to the trap. Secure alt connections securely clamped. A coupling and clamps (in loose part bag) may

with clamps, be installed as shown for future servicing of the vent system.
Install the vent pipe grommet into the casing

Connect the tee trap and the main drain line exiting the casing as
shown in Figure 20.

Note: It is recommended that all PVC piping and fitting
connections be fit up and inspected before final cementing. Both

the external trap and the external tee trap must be primed
before operation, Verify all condensate drain connections are

44001 102404 23

Specifications are subject to change without notice

Horizontal Left through Top

VentDrain
& Clamps

L_

LM

Plastic Caps

J Yellowor black

Alternate Orientation

\ /

Single Pressure Switch Detail

/

,\

_n_ ReliefTubeBlackRubber

Dual Pressure Switch ......

.....,ii "...../ ,"",,'

TrapConnection

Preassemble&
insert intofurnace

............... 3/16" (4.8mm)ID

Flexibletubingconnector

_ /16" (4,8mm)OD (Loose

PartsBag)

ReliefTubeExtension

j BlackRubber3/16" (4.8mm)ID

Cut to Fit (LoosePartsBag)

/

Field
SuppliedTee

\, ii_

Coupling&Clamps
(Optional)

,....... / "5

/ DrainTube

/ BlackRubber

/ 1/2"(12,7mm)ID

/ &Clamps

TeeTrapWhitePVC
(loosepartsbag)

CapandClamp [_
OpenEnd

Representative drawing only_ some models may vary in appearance,

Horizontal Left through Top (SeeFigure16)

Disconnect the hoses from the trap assembly, and remove trap
and trap mounting bracket from the blower compartment. Using
cover plate and gasket provided in the loose parts bag, cover the
hole from the burner compartment to the blower compartment and

secure with screws.
Remove knockout from the side of the furnace casing where drain

tube will exit.

Mount the trap externally to the bottom side of the unit using the

two screws provided in the location shown.

Cut the corrugated tube as shown in the illustration above.
Connect the corrugated hose from the transition to the trap.
Secure connections with clamps.
Remove the black _/2" (12.7mm) ID drain tube from the drain tee.
Install a yellow cap and clamp over the open drain port of the drain

tee.

Connect the black 1/2" (12.7mm) ID drain tube from the Vent Drain

to the trap. Secure connections with clamps.

Connect the 3/16" (4.8mm) ID relief tube to the middle port on the

trap. If an extension is required, use the 3/16" (4.8mm) OD flexible

24

Specifications are subject to change without notice

DrainTubeCorrugated

.... - 5/8.(15,9mm)ID&Clamps

RemoveKObefore
mountingTrap

/

Cutatstraightsection

I

25-24-70

tubing connector and the black 3/_6" (4.8mm) ID relief tube in the

loose parts bag. Cut tube to length. Secure all connections with
clamps.
Cut an appropriate length of 2" (50.8mm) PVC pipe, long enough

to exit the cabinet and connect the vent drain to either:

• A standard field supplied 2" (50.8mm) PVC tee (N9MP1 or
N9MP2 models), or

• A 2" (50.8mm) PVC coupling fastened onto the drain tee

(N9MPD and *9MPD models)

Install tee trap into bottom section of tee.
Connect the tee trap and the main drain line exiting the casing as
shown in Figure 20.
Note: It is recommended that all PVC piping and fitting

connections be fit up and inspected before final cementing. Both
the external trap and the external tee trap must be primed

before operation, Verify all condensate drain connections are
securely clamped. A coupling and clamps (in loose part bag) may

be installed as shown for future servicing of the vent system.

44001 102404

Horizontal Left-Side Vent

Alternate Orientation

Field
SuppliedTee

/

/

/

/

/

/

TeeTrapWhitePVC
(loosepartsbag)

OnSome _I ___

ModelsONLY

Single Pressure Switch Detail

Level or Sloped towards Tee

Dual Pressure Switch

ReliefTubeBlackRub-

Yellowor black
Plastic Cap

/

/'

J Vent Drain

&Clamps

J

s

ElbowTubeBlackRubber1/2"(12,7mm)
ID&Clamps(LoosePartsBag)

....... BarbedCoupling1/2"(12,7mm)OD

(LoosePartsBag)

.........DrainTubeBlackRubber

1/2"(12,7mm)ID&Clamps

TrapConnection

Preassemble&
insertinto furnace

"Clampears"

Pointed OUT

Representative drawing only_ some models may vary in appearance,

ReliefTubing
BlackRubber 3/16" (4,8mm)ID
Cutto Fit(LoosePartsBag)

Horizontal Left-Side Vent (SeeFigure17)

Remove the drain tee from the Vent Drain if installed (N9MPD and

*9MPD models only)

Rotate the inducer 180 ° for a side vent after loosening the 4
inducer attachment screws. Reinstall and retighten the inducer

screws to 20" pounds torque.
Disconnect the hoses from the trap assembly, and remove trap
and trap mounting bracket from the blower compartment. Using

cover plate and gasket provided in the loose parts bag, cover the
hole from the burner compartment to the blower compartment and

secure with screws.
Remove knockout from the side of the furnace casing where drain

tube will exit.

Mount the trap externally to the bottom side of the unit using the

two screws provided in the location shown.

Cut the corrugated tube as shown in the illustration above.
Connect the corrugated hose from the transition to the trap.

Secure connections with clamps.
Connect the black 1/2" (12.7mm) ID drain tube from the Vent Drain

to the trap. If an extension is required, use the black 1/2" OD
flexible tubing connector and the black 1/2" (12.7mm) ID drain tube

in the loose parts bag. Cut tube to length. Secure connections
with clamps.

44001 102404

Specifications are subject to change without notice

..............DrainTubeCorrugated

5/8"(15.9mm)ID&Clamps

Cutat straightsection

Leaveroomfor clamp

I

CutHere

25-24-70a

Connect the 3/16" (4.8mm) ID relief tube to the middle port on the

trap. If an extension is required, use the 3/16" (4.8mm) OD flexible
tubing connector and the black 3/16" (4.8mm) ID relief tube in the

loose parts bag. Cut tube to length.
Cut an appropriate length of 2" (50.8mm) PVC pipe, fittings and

extension pipe long enough to exit the cabinet and connect the

vent drain to either:

• A standard field supplied 2" (50.8mm) PVC tee (N9MP1 or
N9MP2 models), or

• A 2" (50.8mm) PVC coupling fastened onto the drain tee

(N9MPD and *9MPD models)

Install tee trap into bottom section of tee.
Important: The pipe to the tee trap must be level or sloping towards

the tee trap

Connect the tee trap and the main drain line exiting the casing as
shown in Figure 20.

Note: It is recommended that all PVC piping and fitting
connections be fit up and inspected before final cementing. Both

the external trap and the external tee trap must be primed
before operation, Verify all condensate drain connections are
securely clamped. A coupling and clamps (in loose part bag) may

be installed as shown for future servicing of the vent system.

25

Horizontal Right through Top

TrapConnection

Preassemble&
insert intofurnace

Single Pressure Switch Detail

DrainTubeBlack \,
Rubber1/2" (12,7mm)
ID&Clamps

3/16" (4,8mm)ID Rub-

berTube

Coupling&Clamps

(Optional)\

\\\

Plastic Cap
Yellowor black

/

/

VentDrain
& Clamps

Alternate Orientation

&

J

Field

uppliedTee

TeeTrapWhitePVC
(loosepartsbag)

INLET_'}

\ j

\,

On'SomeModels
ONLY

DrainTubeCorrugated5/8"(15,9mm)ID &

ClampsCutatstraightsection /

Leaveroomforclamp

Representative drawing only_ some models may vary inappearance,

I

Horizontal Right through Top (SeeFigure18)

Disconnect the hoses from the trap assembly, and remove trap
and trap mounting bracket from the blower compartment. Using

cover plate and gasket provided in the loose parts bag, cover the
hole from the burner compartment to the blower compartment and

secure with screws.
Remove knockout from the side of the furnace casing where drain

tube will exit.

Mount the trap externally to the bottom side of the unit using the

two screws provided in the location shown.

Cut the corrugated tube as shown in the illustration above.
Connect the corrugated hose from the transition to the trap.

Secure connections with clamps.
Connect the black 1/2" (12.7mm) ID drain tube from the Vent Drain

to the trap. Ifan extension is required, use the black 1/2" (12.7mm)

OD barbed coupling and the black 1/2" (12.7mm) ID drain tube in

the loose parts bag. Cut tube to length. Secure connections with

clamps.

arbedCoupling 112"(12,7mm)

D (Loose PartsBag)

DrainTubeBlackRubber
1/2"(12,7mm)ID &Clamps

RemoveKObefore

nountingTrap

25-24-70b

Connect the 3/16" (4.8mm) ID relief tube to the middle port on the
trap. If an extension is required, use the clear 3/16" (4.8mm) OD
flexible tubing connector and the black 3/16" (4.8mm) ID relief tube

in the loose parts bag. Cut tube to length.

Cut an appropriate length of 2" (50.8mm) PVC pipe, fittings and

extension pipe long enough to exit the cabinet and connect the
vent drain to a standard field supplied 2" (50.8mm) PVC tee

Install tee trap into bottom section of tee.

Connect the tee trap and the main drain line exiting the casing as

shown in Figure 20.

Note: It is recommended that all PVC piping and fitting

connections be fit up and inspected before final cementing. Both

the external trap and the external tee trap must be primed

before operation, Verify all condensate drain connections are

securely clamped. A coupling and clamps (in loose part bag) may

be installed as shown for future servicing of the vent system.

26

Specifications are subject to change without notice

44001 102404

Horizontal Right-Side Vent

Single Pressure Switch Detail

TrapConnection

Plastic Cap

Yellowor black

/

/

Coupling&Clamps
(Optional)

Preassemble&
insert intofurnace

ReliefTube

BlackRubber 3/16" -....

(4.8mm)ID ....

FlexibleTubing Connector3/16'P .....................

(4.8mm)OD(LoosePartsBag)

ReliefTubeExtension ..................

BlackRubber3/16" (4.8mm)ID
Cutto Fit(LoosePartsBag)

Dual Pressure Switch _;

J

/

VentDrain

&Clamps

Levelor Sloped
towardsTee

lemoveKObe1

inting Trap

DrainTube
BlackRubber

112"(12.7mm)ID
& Clamps

Field
SuppliedTee

'_ _Tee Trap

,_J WhitePVC

! _ (loosepartsbag)

--ElbowTubeBlack Rubber

1/2"(12.7mm)ID& Clamps
(LoosePartsBag)

OnSome Models

ONLY

Alternate Orientation

BarbedCoupling1/2" (12.7mm)
OD(Loose PartsBag)

25-24-70c

Representative drawing only_some models may vary in appearance,

Horizontal Right-Side Vent (SeeFigure19)

Disconnect drain tee if installed (N9MPD and *9MPD models only)
Disconnect the hoses from the trap assembly, and remove trap

and trap mounting bracket from the blower compartment. Using
cover plate and gasket provided in the loose parts bag, cover the

hole from the burner compartment to the blower compartment and
secure with screws.

Remove knockout from the side of the furnace casing where drain

tube will exit.

Mount the trap externally to the bottom side of the unit using the

two screws provided in the location shown.

Cut the corrugated tube as shown in the illustration above.
Connect the corrugated hose from the transition to the trap.

Secure connections with clamps.
Connect the black 1/2" (12.7mm) ID drain tube from the Vent Drain

to the trap. If an extension is required, use the 1/2" (12.7mm) OD

barbed coupling and the black 1/2" (12.7mm) ID drain tube in the
loose parts bag. Cut tube to length. Secure connections with

clamps.
Connect the 3/16" (4.8mm) ID relief tube to the middle port on the

trap. If an extension is required, use the clear 3/16" (4.8mm) OD

splice connector and the black 3/16" (4.8mm) ID relief tube in the

loose parts bag. Cut tube to length.

Cut an appropriate length of 2" (50.8mm) PVC pipe, fittings and

extension pipe long enough to exit the cabinet and connect the
vent drain to either:

• A standard field supplied 2" (50.8mm) PVC tee (N9MP1 or
N9MP2 models), or

• A 2" (50.8mm) PVC coupling fastened onto the drain tee

(N9MPD and *9MPD models)

Install tee trap into bottom section of tee.
Important: The pipe to the tee trap must be level or sloping towards

the tee trap

Connect the tee trap and the main drain line exiting the casing as
shown in Figure 20.

Note: It is recommended that all PVC piping and fitting
connections be fit up and inspected before final cementing. Both

the external trap and the external tee trap must be primed
before operation, Verify all condensate drain connections are

securely clamped. A coupling and clamps (in loose part bag) may
be installed as shown for future servicing of the vent system.

44001 102404

27

Specifications are subject to change without notice

Connecting Tee Trap to Condensate
Trap and Main Drain Line

Connecting Vent and CombustionAir Piping

-\./.

r_

t

OpenTee

Evaporator

Coil

Drain Line
(Optional)

Main
Drain

Line

Representativedrawingonly,somemodelsmayvaryin appearance.

The tee trap must be connected to the main condensate drain

line as conceptually shown above. Different installations may
require slightly different orientations. The following steps apply

to all installations.

1. The tee trap should be installed as close to the side or top of
the furnace as practical. Minimize the distance between the

inducer and the tee trap as much as possible.

2. An open tee is to be used at the tee trap discharge. The top

end of the tee should be open to the atmosphere to
eliminate potential air lock problems.

3. The drain line from the tee trap is to be connected to the
furnace condensate trap drain line as shown above.

4. Condensate drain lines from a cooling coil may be

connected downstream of the connection point of the tee

trap and furnace condensate trap.

Important: Prime both traps with water before operation.

Failure to prime the traps may result in discharge of flue gases

from the condensate drain line and open tee for a period of
time, and may result in temporary lockout of the furnace upon

start up. Main drain line construction is left to the discretion of
the installer. It may be made of either ridged pipe or flexible
tube. Tube ID should NOT be less than 1/2,,(12.7mm).

t

Tee Trap

/ /

/

/

= / /

Condensate

Trap 25-24-85

/

,/

CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in

personal injury or death.
Cement or mechanically seal all joints, fittings, etc.

to prevent leakage of flue gases.

Refer to Figure 11 through Figure 19 that corresponds to the
installation position of the furnace for the application.

Preassembte the vent and combustion air piping from the furnace

to the vent termination. Do not cement the pipe joints until the pipe

preassembly process is complete.

CombustionAir PipeConnection (Dual Certified or

Direct Vent)

Install the air intake coupling and gasket to the furnace with the

four (4) screws.

Note: The air intake coupling and gasket can be installed to the top
panel to the alternate air intake locations on either the left or right
side panels of the furnace.

For downflow installation, the air intake coupling and gasket must

be installed to the alternate air intake location on either the left or
right side panels. Remove the 3" (76.2mm) hole plug from the side

panel and relocate to the air intake hole in the top panel. Use four
screws to seal the four (4) mounting holes in the top panel next to

the hole plug. Drill four (4) 7/64" (2.8mm diameter holes in the

casing using the air intake coupling as the template.

The air intake coupling is sized for 2" (50.8mm) PVC pipe.

Install the combustion air pipe to the air intake coupling using RTV
sealant to provide for future serviceability.

Vent PipeConnection

Install the vent pipe grommet to the furnace panel. Locate the
grommet in the furnace panel at a location directly away from the

vent fitting on the combustion blower. The grommet snaps into the

3" (76.2mm) hole plug from the furnace panel. NOTE: Depending
on the installation position, the vent pipe grommet will be installed

to the top panel or to the alternate location on the side panels. If

needed, remove the 3" (76.2mm) hole plug from the furnace panel
and relocate to the open hole in the furnace panel. (See Figure 11
or Figure 20)

Install the vent pipe to the rubber coupling, the vent fitting or the
PVC vent extension pipe. Securely attach using the clamp or PVC

cement as required.

Note: The vent fitting MUST be installed with the air flow
marking arrow pointed toward the vent pipe. (See Figure 21)
Some installations require the vent fitting to be installed with
a 5° to 10° downward slope. (See Figure 11 through Figure 20)

28

Specifications are subject to change without notice

44001 102404

iiiiii;_iiiiii!!ii_iii;;iiii_iiiiii!!iiiii1i_iiiiiii_!iii_}i_iiiiiiiii_iiiiiiiiii!iii_I_iii_i_iiii_

Combustion Blower

RubberCoupling / I Vent Pipe .

&Clamps _ ...... (Top PanelExd)

r _-:_ VentPipe _ NOTE: The 90 ° elbow is approved

f for use inside the furnace ONLY.

NOTE:Built-in channelwill be angled 5° to 10° also.

Sea,,n roce ure,or

25-24-14a

JoiningPipe andFittings

SEE VENT AND COMBUSTION AIR PIPING, Vent and

Combustion Air Piping Guidelines in this manual for applicable

ASTM Standards for vent materials.

FIRE HAZARD
Failure to follow this warning could result in

personal injury, death and/or property damage.
Observe all cautions and warnings printed on

material containers
Provide adequate ventilation and do NOT assemble

near heat source or open flame. Do NOT smoke

while using solvent cements and avoid contact with
skin or eyes.

to inside surface of socket and outside of pipe. Do NOT
allow primer to dry before applying cement.

3. Apply a thin coat of cement evenly in the socket. Quickly
apply a heavy coat of cement to the pipe end and insert pipe
into fittings with a slight twisting movement until it bottoms

out.

NOTE: Cement MUST be fluid while inserting pipe. If NOT, recoat
pipe.

4. Hold the pipe in the fitting for 30 seconds to prevent the
tapered socket from pushing the pipe out of the fitting.

5. Wipe all excess cement from the joint with a rag. Allow 15
minutes before handling. Cure time varies according to fit,
temperature and humidity.

ConnectingVentPipes andTermination

NOTE: Combustion air intake and vent MUST terminate in the

same atmospheric pressure zone. If installation is in a cold climate
(sustained temperatures 0°F (-18°C) and below for 24 or more
consecutive hours), increase the minimum distance between vent
pipe and air intake from 8" (203.2mm) to 18"(457.2mm).

CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in

personal injury or death.
Maintain a minimum of 36" (914.4mm) between

combustion air inlet and clothes dryer vent.

Terminate the combustion air intake as far as

possible from any air conditioner, heat pump,

swimming pool, swimming pool pumping,

chlorinator or filtration unit.

1. Install all couplings, nipples and elbows using proper
procedures for Joining Pipe and Fittings and maintain

spacing between vent and combustion air piping as
indicated in Figure 22 through Figure 30.

Sidewall Termination 12"

...........................................................................................................More Above Snow Level or Grade Level

8" (203.2mm)* MIN.
20' (6.1m) MAX _ "18" (457.2mm) Minimum for

_-_ c01dclimates[sustained0°F

_ >_ (-17°0) and bel0w f0r240r

_ _i more consecutivehours]

(304.8mm)

or

CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in

personal injury or death.
Do NOT use solvent cement that has become

curdled, lumpy or thickened and do NOT thin.
Observe precautions printed on containers. For

applications below 32 ° F (0°C), use only low
temperature type solvent cement. Poor joints may

lead to disconnected or leaking vent pipe joints

allowing carbon monoxide to enter the living space.

1. Cut pipe end square, remove ragged edges and burrs.
Chamfer end of pipe, then clean fitting, socket and pipe joint
of all dirt, grease, or moisture.

NOTE: Stir the solvent cement frequently while using. Use a
natural bristle brush or the dauber supplied with the cement. The
proper brush size is one inch.

2. After checking pipe and socket for proper fit, wipe socket
and pipe with cleaner-primer. Apply a liberal coat of primer

44001 102404

Specifications are subject to change without notice

//

.... zfJ_GRA_ L'_VEL

_J o_

HorizontalTermination

1. Cut two holes.21/2" (63.5mm) for 2" (50.mm) pipe, 3" (76.2mm)
for 21/2" (63.5mm) pipe, or 3_/2" (88.9mm) for 3" (76.2mm)

pipe. Do NOT make the holes oversized, or itwill be necessary
to add a sheet metal or plywood plate on the outside with the

correct size hole in it.

2. Check hole sizes bymaking sure it is smaller than the couplings
or elbows that will be installed on the outside. The couplings or
elbows MUST prevent the pipe from being pushed back
through the wall.

3. Extend vent pipe and combustion air pipe through the wall 3/4"

(19.1mm) to 1" (25.4mm) and seal area between pipe and

wall.

SNOW LEVEL 25-00-05F

29

4. Install the couplings, nipple and termination elbows as shown
and maintain spacing between vent and combustion air piping
as indicated in Figure 22, Figure 23 and Figure 24.

A metal shield is recommended 18" x 18" (457.2mm x 457.2mm)

min. or 18" (457.2mm) min. diameter around the vent termination
at the exterior wall to protect the house exterior materials from flue

)roduct or condensation (freezing) damage.

Sidewall Termination with Exterior
Risers to Get Above Snow Level or Grade
Level

8" (203.2mm)* MIN.

20' (6.1m) MAX

zl_ "18" (457.2mm)Minimumforcoldclimates [sustained 0°F

(-17°C) and belowfor24 or
more consecutivehours]

8" (203.2mm)

/ MIN.

25-00-04F

Recommended Alternate Installation

forSustainedColdWeather[0° F(-17°C)&belowfor24

hoursormoreconsecutivehours]

Using ExteriorRisers

1. Install elbows and pipe to form riser as shown in Figure 23.

2. Secure vent pipe to wall with galvanized strap or other rust
resistant material to restrain pipe from moving.

3. Insulate pipe with Armaflex or equivalent moisture resistant
closed cell foam insulation or Fiberglass insulation if boxed
in and sealed against moisture.

VerticalTermination

1. Figure 25 shows the proper installation and clearances for
vertical vent termination. The vertical roof termination

should be sealed with a plumbing roof boot or equivalent
flashing. The inlet of the intake pipe and end of the exhaust
vent must be terminated no less than 12" (304.8mm) above
the roof or snow accumulation level, and 12" (304.8mm)
away from a vertical wall or other protrusion.

2. If the vent system is installed in an existing chimney make
sure clearances shown in Figure25 are maintained.

Horizontal section before the termination elbow can be
extended on the inlet air to provide necessary clearance.

Rooftop Termination

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

BS,

FRONT Vl EW

SameJoist

Space

EXHAUST 12" (304.8mm)MIN.

\ j

SIDE VIEW

OVERHANG

12" (304.8mm)MIN, Ground
Level ORSnow Level

12"(304.8mm)MIN.

25-23-73

A = 12" (304.8mm) Above roof or snow accumulation level

B= 8" (203.2mm) Min., 20' (6.1m) Maximum, except in areas

with extreme cold temperatures [sustained 0°F(-17°C) and
below for 24 or moreconsecutive hours], the 18"(457.2mm)

Min.

VentTerminationShielding

Under certain wind conditions some building materials may be
affected by flue products expelled in close proximity to
unprotected surfaces. Sealing or shielding of the exposed
surfaces with a corrosion resistant material (such as aluminum
sheeting) may be required to prevent staining or deterioration. The
protective material should be attached and sealed (if necessary) to

the building before attaching the vent terminal.

MultiVentTerminationClearances

When two (2) or more furnaces are vented near each other, each
furnace must be individually vented.

Two (2)vent terminations may be installed as shown in Figure 26,

Figure 27, Figure 28, and Figure 29, but the next vent
termination must be at least 36" (914.4mm) away from first two
terminations. It is important that vent terminations be made as

shown to avoid recirculation of flue gases.

30

Specifications are subject to change without notice

44001 102404

Concentric Vent and Combustion-

Air Roof Termination

_2" (5t.8mm) Max

_ __ _ 36" Min -_'_1/_ ..... Exhaust

Min.Gradeor ......_ 0 ,,j 36" Min (__)

Sidewall Inlet Vent and Exhaust-Air

Termination with Exterior Risers

18"Min. for ColdClimates - - --_--_--1-- _--I--< _---

(Sustainedtemperatures0° F I-[-_r-i----[-_iiiii---'_,-_
and below for24 or morecon- __ )__r___ f --" 8" M n
secutivehours) " "_1_ _ -'-_ / / S_" _ =

--[i< _>_ _- >---%___-__L--8"Min. / /'-_._ '. , \ __-

._ ....__-_ ....... _ _ . ,_.

-J _-xnaust__ _/_ _--_f _-- _-_p_ _' 12"Mn

/ /--f_ =_ _ ,,/_ __._ i _ _ ..... Grade or

i i_ /_, _:::__/ _ >: / -_ SnowLevel

o.us.

Concentric Vent and Combustion-

Air Sidewall Termination

............. I

CombustionAir ...... Maximum ........................

.........f_!/ _" ,j_-- _.......... _._..,-

............... [ ............

...........\L __Z_:_I..... _ ......--""A"

...............---::-...._._ ":::_._'--_......

Vent 25-22-02d

Dimension "A" is touching or 2" (50.4mm) maximum separation.

11111 i i:::i

Sidewall Inlet Vent and Exhaust-

Air Termination

,,?- -__ _x

Dimension "A" is touchin_ or 2" (50.4mm) maximum separation.

N: Rooftop Inlet Vent and Exhaust-

Air Termination

18"Min. for ColdClimates .... , ._

(Sustainedtemperatures 8" (203.2MM)Min. ,,.-_.........._

_ 0o F and below for 24 or 20' (6.1) Max. _I _'i..... '\

moreconsecutivehours) n et "" -; --_-'--_"

',,',, :,_._.---,-- ._ ._ .... -,....

" " "--'-- i _ "_ ) -> _---'_-

",,",, ........',,i.......I_,!_ ....,_ -__:- ",,....

" _..... ,\F .4', ,-.... _---_-\'_--'_

12"(304.8mm)_ ',,",,....... _ -:___J--:_--_---_-''_,.[-i'__Exhaus!_

Mn Grade or ",_'_---__-%-,,.... _---_,........', z ---_---',.--'-'.......

SnowLevel -_",",- .;!_-- -- '\---_,...........',_......:'""" _..............

",.",,('"_"-_'......-"_...........18"(457:2mm)Min.forColdClimates

'_,\......... ...........[Sustained0°F(-17°C) andbelowfor

I"_ -.... 24 hoursor moreconsecutivehours]

" 25 22 43

"-r-"--J-"_Jr" .->"J---_-'s".b---"Exnaus!\ ---_' ( " --j_

';>"S-¢'_>-_1--_;_->_J...... ._:: :.4: _ / _ .......

::-:""-,nIet[ ..../_ ........>...._.)V-_ .-

\ '.' \. m', _..................20' (6.1m)Max.

_ /_ _ ...........

Iz"(_o_,_mm)_n........_ i_"(_7._mm)Mm.forColdChmates

Gradeor SnowLevel [Sustained0°F(-17°C) and belowfor

j _--- 24hours ormore consecutivehours]

........Dimension "A" is touching or 2" (50.4mm) maximum separation.

44001 102404

Specifications are subject to change without notice

31

Concentric Termination

CARBON MONOXIDE POISONING, FIRE AND

EXPLOSION HAZARD
Failure to follow this warning could result in

personal injury, death and/or property damage.
Inlet and outlet pipes may NOT be vented directly

above each other (standard vent terminals).

ConcentricVentTermination
Kit# NAHA001CV & NAHA002CV

For Concentric Vent Termination information call 931.270.4100
with the complete model and serial number of the furnace.
Refer to Special Venting Requirements for Installations in Canada

in the Vent and Combustion Air Connections Section.

These kits are for vertical or horizontal termination of the

combustion air inlet and the exhaust vent pipes on Category IV
gas-fired condensing furnaces. The NAHA001CV kit can be used

for 3" (76.2mm) diameter pipe systems. The NAHA002CV kit can

be used for 2" (50.8mm) diameter pipe system. Refer to Table 5
or Table 6 for the correct pipe size for the furnace. Both the

combustion air inlet and the exhaust vent pipes must attach to the

termination kit. The termination kit must terminate outside the

structure and must be installed per the instructions outlined below

for vertical or horizontal termination. Vertical termination is

preferred. Field supplied pipe and fittings are required to complete

the installation.

Concentric Termination Kit

NAHA001CV & NAHA002CV Venting

Table for N9MPD & *9MPD Models

40,000, 50,000, 60,000, 75,000 & 80,000 Btuh Furnaces

NAHA002CV - 35' (10.7m) & (4) 90 ° elbows

with 2" (50.8mm) PVC pipe or

NAHAO01CV - 65' (20m) & (4) 90° elbows

with 3" (76.2mm) PVC pipe

100,000 Btuh Furnace

NAHAOOIOV - 35' (10.7m) & (4) 90 ° elbows

with 3" (76.2mm)PVC pipe or

NAHAO01CV - 65' (20m) & (4) 90° elbows

with 3" (76.2mm) PVC pipe &

Long Vent Kit (see Tech. Manual).

125,000 Btuh Furnace

NAHAOOlCV - 35' (10.7m) & (4) 90 ° elbows

with 3" (76.2mm) PVC pipe

1, Do not include the field supplied 45 ° elbow in the total elbow

count.

2, If more than four elbows are required, reduce the length of

both the inlet and the exhaust pipes five feet for each
additional elbow used.

3. Elbows are DWV long radius type for 2" (50,8ram) and 3"
(76,2mm) vents,
NOTE: The minimum vent length is 5' (1.5m) of PVC. Feet of pipe
is whichever pipe run is the longest, either inlet or outlet side,

Concentric Termination Kit

NAHA001CV & NAHA002CV Venting

Table for N9MP2 Models

50,000 & 80,000 Btuh Furnaces

NAHAOO2CV - 35' (10.7m) & (4) 90 ° elbows

with 2" (50.8mm) PVC pipe or

NAHAO01CV - 65' (20m) & (4) 90 ° elbows

with 3" (76.2mm) PVC pipe

75,000 Btuh Furnaces

NAHAOO2OV - 20' (6.9m) & (2) 90 ° elbows

with 2" (50.8mm) PVC pipe or

NAHAOO2OV - 35' (10.7m) & (4) 90° elbows

with 2" (50.8mm) PVC pipe &

Long Vent Kit (See Tech. Manual) or

NAHAOOIOV - 65' (20m) & (4) 90° elbows

with 3" (76.2mm) PVC pipe

100,000 Btuh Furnace

NAHAOOlCV - 35' (10.7m) & (4) 90° elbows

with 3" (76.2mm)PVC pipe or

NAHAO01 CV - 65' (19.8m) & (4) 90 ° elbows

with 3" (76.2mm) PVC pipe &

Long Vent Kit (see Tech. Manual).

125,000 Btuh Furnace

NAHAOOlCV - 35' (t0.7m) & (4) 90 ° elbows

with 3" (76.2mm) PVC pipe

1, Do not include the field supplied 45 ° elbow in the total elbow

count.

2, If more than four elbows are required, reduce the length of

both the inlet and the exhaust pipes five feet for each
additional elbow used.

3. Elbows are DWV long radius type for 2" (50.8mm) and 3"
(76.2mm) vents,
NOTE: The minimum vent length is 5' (1.5m) of PVC. Feet of pipe
is whichever pipe run is the longest, either inlet or outlet side,

Do not use field supplied couplings to extend the pipes,

Airflow restriction will occur and the furnace pressure switch

may cause intermittent operation,

32

Specifications are subject to change without notice

44001 102404

Gas Supply and Piping

FIRE AND EXPLOSION HAZARD
Failure to follow this warning could result in

personal injury, death and/or property damage.
Models designated for Natural Gas are to be used

with Natural Gas ONLY, unless properly converted to
use with Propane gas.

NOTE: The rating plate is stamped with the model number, gas

type and gas input rating.

GasSupplyRequirements

Gas supply pressure should be within minimum and maximum values listed on rating
plate, Pressures are usually set by gas suppliers.

(See Propane Gas Conversion Kit instruction manual for furnaces converted to
Propane gas)

• Use only the Type of gas approved for this furnace. See
rating plate for approved gas type.

• A 1/8" NPT plugged tapping, accessible for a test gauge
connection,must be installed immediately upstream of the

gas supply connection to furnace.

• Gas supply pressure should be within minimum and
maximum values listed on rating plate. Pressures are

usually set by gas suppliers.

• Gas input must not exceed the rated input shown on the
rating plate. Overfiring will result infailure of heat exchanger

and cause dangerous operation.

• Do NOT allow minimum gas supply pressure to vary
downward. Doing so will decrease input to furnace. Refer to

Table 8, Table 9, Table 10, Table 11 and Table 12 for

normal gas supply and manifold pressures.

iiii ii i i!i!i!i!i!i!i!i!i!i!i!i!i!i!i!i!i!i!i!i!i!i!i!i!i!iii

GasType Supply Pressure

Recommended Max. Min.

Natural 7 in wc 14 inwc 4.5 inwc

Propane 11 in wc 14 in wc 11in wc

GasPipingRequirements

NOTE: The gas supply line must be installed by a qualified service

technician in accordance with all building codes.

NOTE: In the state of Massachusetts.

a. Gas supply connections MUST be performed by a

licensed plumber or gas fitter.

b. When flexible connectors are used, the maximum length

shall not exceed 36" (915 mm).

c. When lever handle type manual equipment shutoff

valves are used, they shall be T-handle valves.

d. The use of copper tubing for gas piping is NOT approved

by the state of Massachusetts.

Gas Pressures

(1.8kPa) (3.5 kPa) (1.1 kPa)

(2.7kPa) (3.5 kPa) (2.8 kPa)

1. Install gas piping in accordance with local codes, or in the
absence of local codes, the applicable national codes. Refer

to NFPA 54/ANSI Z223.1 for proper gas pipe size.

2. It is recommended that a manual equipment shutoff valve be
installed in the gas supply line outside the furnace. Locate

valve as close to the furnace as possible where it is readily

accessible. Refer to Figure 31,

3. Use black iron or steel pipe and fittings or other pipe approved
by local code.

4. Use pipe thread compound which is resistant to natural and
Propane gases.

5.

Use ground joint unions and install a drip leg no less than 3"
(76.2mm) long to trap dirt and moisture before it can enter gas

control valve inside furnace.

NOTE: Refer to Figure 31 or Figure 32 for the general layout at

the furnace. The rules listed apply to natural and Propane gas pipe

installations.

NOTE: Install the gas pipe grommet to the furnace side panel with
the gas pipe entry. If needed, remove the 2" (50.8mm) hole plug
from the plastic accessory bag and relocate to the open hole in the
furnace side panel.

FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in

personal injury, death and/or property damage.

A flexible corrugated metal gas connector must be

properly installed, shall not extend through the side
of the furnace,and shall not be used inside the

furnace.

Black iron pipe shall be installed at the furnace gas
control valve and extend a minimum of 2" (50.8mm)

outside furnace casing.

6. Use two pipe wrenches when making connections to
prevent gas valve from turning.

7. Install a manual shut-off valve external to furnace casing
and tighten all joints securely.

8. If local codes allow the use of flexible gas appliance
connectors, always use a new listed connector.
Do not use a connector which has previously serviced
another gas appliance.

9. Flexible corrugated metal gas connector may NOT be used
inside the furnace or be secured or supported by the

furnace or ductwork.

10. Properly size gas pipe to handle combined appliance load
or run gas pipe directly from gas meter or Propane gas

regulator.

11. Install correct pipe size for run length and furnace rating.

12. Measure pipe length from gas meter or Propane second
stage regulator to determine gas pipe size.

44001 102404

33

Specifications are subject to change without notice

_i_ _1::,, : :_l Typical Gas Piping for Upflow

iiiiiiiiiiiiiiiiiiiiiUiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

DripLegand Union,Union*shouldbeoutsidethe
cabinet.Manualshut-offvalveMUST beupstreamof
dripleg, union,andfurnace.

Useelbowsand3"(76.2mm)pipenippletocon-
nectvalvetopipingwhenusingrightsidegas"-._

pipeentry, z-........... ----.

- . /- \ __S/ pipe .
t,ropaneLowpres-\ _ . .

sureswitch ".\ .... ............._ topple

REQUIRED.

Manualshut-off

valve

VentPipeGrommet(SinglePipe)

Model may
pressl ire

2

* Union may be installed inside the cabinet when necessary

25-24-86

because of clearances.

Representative drawing only, some models may vary in appearance.

Fi_ Typical Gas Piping for Downflow

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

Use elbows and 3" (76.2mm) pipe nipple to con-

jJ -- \.\\

/

nect valve to piping when using left side gas -
pipe entry.

PropaneLowpres- "-_

s

sureswitch " ...........

REQUIRED. Manualshut-qff

valve

Drip Leg and Union, Union* should be
the cabinet. Manual shut-off valve MUST be

upstream of dripleg, union, and furnace.

Gas Pipe Grommet

*Union may be installed inside the cabinet when necessary (Single Pipe)
because of clearances. 25-25-46a

Re resentative drawin onl some models ma var in a earance.

AdditionalPropaneConnectionRequirements

1. Have a licensed Propane gas dealer make all connections
at storage tank and check all connections from tank to

furnace.

2. If copper tubing is used, it MUST comply with limitation set in
National Fuel Gas Code or CGA codes.

3. Two-stage regulation of Propane gas is recommended.

FIRE, EXPLOSION, UNIT DAMAGE HAZARD
Failure to follow this warning could result in death,

property damage and/or personal injury.

A Propane conversion accessory kit is required

when operating the furnace with Propane gas.

PropaneConversion

An accessory kit shall be used to convert to propane gas use, see
the furnace rating plate for the Propane conversion accessory kit

part number.

34

Specifications are subject to change without notice

44001 102404

AlternateBTUHInput Ratings(USAOnly)*

The input rating of these furnaces can be changed from the

standard input rating to the alternate input rating shown in Table 8,
by changing the main burner orifices. Changing of burner orifices
MUST be done by a qualified service technician. See section on
changing orifices or following page.

• In the USA, derating of these furnaces at 2% (Natural Gas)
and 4% (Propane Gas) has been tested and design-certified
by CSA.

In Canada, the input rating must be derated 5% (Natural Gas)
and 10% (Propane Gas) for altitudes of 2,000 to 4,500 (609.6

to1371 .Cm) above sea level. Use the 2001 to 3000 (609.9 to

914.4m) column in Table 9, Table 1O,Table 11 and Table 12.

iiii iii i!i!i!i!i!i!i!i!i!i!i!i!i!i!i!i!i!i!i!_

BTUH BTUH Natural Propane

Standard Alternate Gas Gas

Rating Rating Orifice* Orifice**

Alternate Input Ratings, USA ONLY.

50,000 40,000 #44 #55

75,000 60,000 #44 #55

100,000 80,000 #44 #55
125,000 100,000 #44 #55

*See Table 11for High Altitude
** See Table 12for HighAltitude

ManifoldGas PressureAdjustment

SEE CHECKS AND ADJUSTMENTS, Manifold Gas Pressure

Adjustment in this manual.

MANIFOLDPRESSUREANDORIFICESIZE FORHIGHALTITUDEAPPLICATIONS

NATURAL GAS MANIFOLD PRESSURE (in wc)25,000BTU per burner

.... MEAN ELEVATION ABOVE SEA LEVEL - ft(m)

HEATING 7001 to 8000

VALUE (2133.9to 2438,4)

at ALTITUDE Orifice Manifold

BTU/CU, FT. No. Pressure

700 4t 3.7
725 4t 3.7 4t 3.4
750 4t 3.5 42 3.6
775 4t 3.6 42 3.6 42 3.3

800 4t 3.6 42 3.7 42 3.4 42 3.1
825 4t 3.7 4t 3.4 42 3.5 42 3.2 42 2.9
850 : : = : _'::. _ ; i _ ; 4t 3.5 42 3.6 42 3.3 42 3.0 42 2.8
875 4t 3.6 42 3.6 42 3.4 42 3.1 42 2.8 42 2.6

0 to 2000 2001 to 3000* 3001 to 4000 4001 to 5000 5001 to 6000 6001 to 7000

(0to 609.6) (609.9to 914.4)* (914.7to 1219.2) (1219.5to 1524) (1524.3to 1628,6) (1629.1to 2133.6)

Orifice Manifold Orifice Manifold Orifice Manifold Orifice Manifold Orifice Manifold Orifice Manifold

No. Pressure No. Pressure No. Pressure No. Pressure No. Pressure No. Pressure

i _ i i iNN i ,--_Ni N [;1IN [

900 42 3.7 42 3.4 42 3.2 42 2.9 42 2.7 42 2.5

925 4t 3.7 42 3.5 42 3.3 42 3.0 42 2.8 42 2.5 44 3.3
950 4t 3.5 42 3.3 42 3.1 42 2.9 42 2.6 42 2.4 44 3.1
975 42 3.7 42 3.2 42 2.9 42 2.7 42 2.5 44 3.2 45 3.6

1000 42 3.5 42 3.0 42 2.8 42 2.6 42 2.4 45 3.7 45 3.4
1050 42 3.2 42 2.7 42 2.5 44 3.3 45 3.6

1100 43 3.6 42 2.5 44 3.2 45 3.6 _ [ [ i_ [ [ i_ [ [ i

conversion:1in wc=.25kPa
NOTE: Natural gas data is based on 0.60 specific gravity. For fuels with different specific gravity consult the National Fuel Gas Code ANSI Z223.1/NFPA

54-2009 or National Standard of Canada, Natural Gas And Propane Installation Code CSA B149.1-05.

* In the USA, derating of these furnaces at 2% (Natural Gas) and 4% (Propane Gas) has been tested and design-certified by CSA.

In Canada, the input rating must be derated 5% (Natural Gas) and 10% (Propane Gas) for altitudes of 2,000 to 4,500 (609.6 to
1371 .Cm) above sea level. Use the 2001 to 3000 (609.9 to 914.4m) column in Table 9, Table 10, Table 11 and Table 12.

PROPANE GAS MANIFOLD PRESSURE (in wc) 25,000 BTU per burner

HEATING VALUE MEAN ELEVATION ABOVE SEA LEVEL - ft(m)

at ALTITUDE 0 to 2000 2001 to 3000* 3001 to 4000 4001 to 5000 5001 to 6000 6001 to 7000 7001 to 8000

BTU/CU. FT. (0to 609.6) (609.9to 914.4)* (914.7to 1219.2) (1219.5to 1524) (1524.3to 1828.8) (1829.1to2133.6) (2133.9to 2438.4)

2500 10.0 10.0 9.0 10.0 9.4 8.5 10.0

Orifice Size #54 #54 #54 #55 #55 #55 i #5_ i

Conversion:1inwc=.25kPa

NOTE: Propanedata is basedon 1.53 specific gravity. Forfuels with differentspecific gravity consult the National FuelGas CodeANSI Z223.1/NFPA

54-2009 or National Standard Of Canada,Natural Gas And Propane InstallationCode CSA Bt49.t-05.

* In the USA, derating of these furnaces at 2% (Natural Gas) and 4% (Propane Gas) has been tested and design-certified by CSA.

In Canada, the input rating must be derated 5% (Natural Gas) and 10% (Propane Gas) for altitudes of 2,000 to 4,500 (609.6 to
1371 .Cm) above sea level. Use the 2001 to 3000 (609.9 to 914.4m) column in Table 9, Table 10, Table 11 and Table 12.

44001 102404 35

Specifications are subject to change without notice

iiiiiii iiii lliiiii!!lt

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

HEATING

VALUE

at ALTITUDE

BTU/CU, FT,

700 42 3.6
725 _÷. :_' 42 3.5 42 3.4
750 42 3.3 42 3.2
775 ,-:)_ _- _ : 41 2,9 43 3,7 43 3,6

NATURAL GAS MANIFOLD PRESSURE (in wc)
FOR THE 4Ok, 60k & 80k BTUH MODEL AND ALTERNATE INPUT MODELS 20,000 BTUperburner

MEAN ELEVATION ABOVE SEA LEVEL - ft(m)

0 to 2000 2001 to 3000* 3001 to 4000 4001 to 5000 5001 to 6000 6001 to 7000 7001 to 8000

(0to 609.6) (609.9to914.4)* (914.7to 1219.2) (1219.5to 1524) (1524.3to 1828,8) (1829.1to 2133.6) (2133.9to2438,4)

Orifice Manifold Orifice Manifold Orifice Manifold Orifice Manifold Orifice Manifold Orifice Manifold Orifice Manifold

No. Pressure No. Pressure No. Pressure No. Pressure No. Pressure No. Pressure No. Pressure

800 42 3,1 43 3,6 43 3,5 43 3,4

825 43 3,7 43 3,6 43 3,4 43 3,3 44 3,6

850 :;_ ._;_ ....................................................................43 3,5 43 3,4 44 3,7 44 3,6 44 3,4

875 43 3.4 43 3.3 44 3.6 44 3.5 44 3.4 44 3.2

900 _ i .... 44 3,7 44 3,6 44 3,4 44 3,3 44 3,2 44 3.1

925 44 3,7 44 3,5 44 3,4 44 3,2 44 3,1 45 3.6 45 3.5
950 44 3,5 44 3,3 44 3,2 44 3,1 45 3.6 45 3.5 45 3.3
975 44 3,3 44 3,1 45 3.7 45 3.5 45 3.4 45 3.3 45 3.2

1000 44 3.2 45 3.6 45 3.5 45 3.4 45 3.2 45 3.1 46 3.1
1050 46 3.6 45 3.3 45 3.2 45 3.1 46 3.1

1100 46 3.3 45 3.0 46 3.0 46 2.9

Conversion:1inwc=.25kPa
NOTE: Natural gas data is based on 0.60 specific gravity. For fuels with different specific gravity consult the National Fuel Gas Code ANSI Z223.1/NFPA

54-2009 or National Standard of Canada, Natural Gas And Propane Installation Code CSA B149.1-05.

* In the USA, derating of these furnaces at 2% (Natural Gas) and 4% (Propane Gas) has been tested and design-certified by CSA.

In Canada, the input rating must be derated 5% (Natural Gas) and 10% (Propane Gas) for altitudes of 2,000 to 4,500 (609.6 to
1371 .Cm) above sea level. Use the 2001 to 3000 (609.9 to 914.4m) column in Table 9, Table 10, Table 11 and Table 12.

PROPANE GAS MANIFOLD PRESSURE (in we)
FOR THE 40k, 60k & 80k BTUH MODEL AND ALTERNATE INPUT MODELS 20,0OOBTU per burner

HEATING VALUE MEAN ELEVATION ABOVE SEA LEVEL - ft(m)

at ALTITUDE 0 to 2000 2001 to 3000* 3001 to 4000 4001 to 5000 5001 to 6000 6001 to 7000 7001 to 8000

BTU/CU, FT, (0 to 609.6) (609.9to914.4)* (914.7to 1219.2) (1219.5to 1524) (1524.3to 1828.8) (1829.1to2133.6) (2133.9to2438.4)

2500 10.0 8.9 8.4 10.0 10.0 10.0 10.0

Orifice Size #55 #55 #55 #5_ #5_ #5_

Conversion:1inwc=.25kPa

NOTE: Propanedata is basedon 1.53 specific gravity. Forfuels with differentspecific gravity consult the National FuelGas CodeANSI Z223.1/NFPA

54-2009 or National Standard Of Canada,Natural Gas And Propane InstallationCode CSA B149.1-05.

* In the USA, derating of these furnaces at 2% (Natural Gas) and 4% (Propane Gas) has been tested and design-certified by CSA.

In Canada, the input rating must be derated 5% (Natural Gas) and 10% (Propane Gas) for altitudes of 2,000 to 4,500 (609.6 to
1371 .Cm) above sea level. Use the 2001 to 3000 (609.9 to 914.4m) column in Table 9, Table 10, Table 11 and Table 12.

The burner orifice part nos. are as follows:

Orifice Part #

41 1096942
43 1011377
45 1011353

47 1011378
49 1113202
55 1011354

Orifice Part#

42 1011351
44 1011352
46 1011744

48 1113201
54 1011376
56 1011355

2. For operation with natural gas at altitudes above 2,000'
(609.6m), orifice change and/or manifold pressure

adjustments may be required for the gas supplied. First
consult your local gas supplier, then refer to Table 9 for
required pressure change and/or orifice change for high

altitudes.

3. For operation with Propane gas, gas orifices MUST be

changed and manifold pressure MUST be maintained as
per Table 10. Orifices can be ordered through our
distributor. (See Figure 33)

GeneralDeratingRules

These furnaces may be used at full input rating when

installed at altitudes up to 2,000' (609.6m). When installed
above 2,000' (609.6m), the input must be decreased 2%
(natural) or 4% (Propane) for each 1000' (304.8m) above
sea level in the USA. In Canada, the input rating must be
derated 5% (natural) or 10% (Propane) for each 1000'
(304.8m) above sea level. See Table 11 or Table 12 for
required high altitude input rate.

36

Specifications are subject to change without notice

440011024 04

High Altitude Input Rate =

Nameplate Sea Level Input Rate x (Multiplier) [USA]

High Altitude MultiplierElevation

ft (m)

2001' - 3000'

(609.9 - 914.4)

3001' - 4000'

(914.7 - 1219.2)

4001' - 5000'

(1219.5 - 1524)

5001' - 6000'

(1524.3 - 1828.8)

6001' - 7000'

(1829.1 - 2133.6)

7001' - 8000'

(2133.9 - 2438.4)

Natural Gas Propane Gas

0.95 0.90

0.93 0.86

0.91 0.82

0.89 0.78

0.87 0.74

0.85 0.70

* Based on mid-range of elevation.

4. In cases where Table 9 or Table 10 is not applicable, eg.
alternate input rate application, refer to Table 11 or

Table 12 for required high altitude input rate.

HighAltitudeAir PressureSwitch

Altitudes over 4,000' (1219.2m) may require a different air

pressure switch than the one installed at the factory. Check parts
list for pressure switch and consult your distributor for part number
and availability. In Canada, provincial codes may govern
installation of switch. Check with governing authorities.

ChangingOrificesfor HighAltitude

ELECTRICAL SHOCK, FIRE OR EXPLOSION
HAZARD

Failure to follow this warning could result in
personal injury, death, and/or property damage.

Turn OFF electric power at fuse box or service

panel and gas supply at manual valve in gas valve,
lockout and tag switch with a suitable warning
label, when installing orifices. Installation of

orifices requires a qualified service technician.

NOTE: Main burner orifices can be changed for high altitudes.

1. Disconnect gas line from gas valve.

2. Remove manifold from furnace.

3. Remove the orifices from the manifold and replace them
with properly sized orifices.

4. Tighten orifices so it is seated and gas tight. (See
Figure 33)

5. Reinstall manifold. Ensure burners do NOT bind on new
orifices.

NaturalGas InputRatingCheck

SEE CHECKS AND ADJUSTMENTS, Natural Gas Input Rating
Check in this manual.

FinalGas PipingCheck

FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in

personal injury, death, and/or property damage.
Never test for gas leaks with an open flame. Use a

commercially available soap solution made
specifically for the detection of leaks to check all

connections. A fire or explosion could result
causing property damage, personal injury and/or

loss of life.

1. The furnace and the equipment shut off valve must be
disconnected from the gas supply piping system during any
pressure testing of that system at test pressures in excess
of 1/2_" PSIG. Close the manual shut-off valve before testing

at such pressures.

2. When installation is complete, test all pipe connections for
leaks with the gas pressure less than 1/2_" PSIG to the gas

valve.

3. The furnace must be isolated from the gas supply system by
closing the equipment shut off valve during any pressure
testing of the gas supply system at test pressure equal to or

less than 1/2" PSI.

4. Apply a commercial soap solution to all joints to test for
leaks. Correct any leaks indicated by bubbles.

5. Correct even the smallest leak at once.

6. Check for leaks at gas valve and orifice connections to the
burner manifold while the furnace is operating.

RISQUE D'INDENDIE OU D'EXPLOSION
Le non-respect des avertissements de securite

pourrait d'entrainer des blessures graves, la mort
ou des dommages materiels.

Ne jamais utiliser une flamme nue pot verifier la
presence des fuites de gaz. Pour la verification de

tous les joints, utiliser plut6t une solution

savonneuse commerciale fabriquee
specifiquement pur la detection des fuites de gaz.
Un incendie ou une explosion peut entrainer des
dommages materiels, des blessures ou la mort.

Changing Orifices

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

44001 102404

Measure from face of orifice

37

Specifications are subject to change without notice

Electrical Wiring

ELECTRICAL SHOCK HAZARD
Failure to follow this could result in personal injury

or death.

Turn OFF electrical power at fuse box or service

panel, lockout and tag switch with a suitable
warning label, before making any electrical
connections and ensure a proper ground
connection is made before connecting line
voltage.

PowerSupply Wiring

The furnace MUST be electrically wired and grounded in

accordance with local codes, or in the absence of local codes with

the latest edition of The National Electric Code, ANSI NFPA 70

and/or The Canadian Electric Code CSA C22.1.

The power supply to the furnace connections must be between

104 VAC and 127 VAC during furnace operation for acceptable
performance.

Field wiring connections must be made inside the furnace
connection box. A suitable strain relief should be used at the point

the wires exit the furnace casing.

Copper conductors shall be used, Line voltage wires should
conform to temperature limitation of 35° C rise and be sized for the
unit maximum amps stated on the rating plate. Add the full load

amps for potential field-installed accessories such as electronic
air cleaners and humidifiers that would receive power from the

furnace control. The furnace control is rated for a maximum of 1.0

amps combined for EAC and HUM. Consult NEC or local codes for
proper wire and circuit sizing.

NOTE: Furnace will not have normal operation if line polarity is
reversed. Check ALL field and control connections prior to
operation.

JunctionBox (J-Box) Relocation

The J-Box is installed on left side of casing. An alternate J-Box

location on right side can be used.

1. Remove bag containing two hole plugs and two self tapping
screws from loose parts bag in blower compartment.

2. Remove two screws holding J-Box to casing.

3. Move large hole plug from right to left J-Box location.

4. Clip wire tie holding J-Box wires.

5. Move J-Box to alternate location and attach using two self

tapping screws from bag.

6. Apply two hole plugs from bag at left J-Box location.

Thermostat

Thermostat location has an important effect on the operation of the

unit. Follow instructions included with thermostat for correct
mounting and wiring.

Low voltage connections to furnace must be made on terminal
board of furnace control.

Heat anticipator setting will need to be measured if 24VAC
humidifier is installed. Measure current in series from R to W atthe

thermostat. Be sure 24VAC humidifier is wired upto control. Allow
furnace to operate for two minutes before recording the AC

amperage reading. Set anticipator on thermostat to recorded

value.

OptionalEquipment

38

Specifications are subject to change without notice

All wiring from furnace to optional equipment MUST conform to

local codes or, in the absence of local codes with the latest edition
of The National Electric Code, ANSI NFPA 70 and/or The

Canadian Electric Code CSA C22.1. Install wiring in accordance
with manufacturer's instructions. The wiring MUST have a
minimum temperature rating of 105° C.

Humidifier/Electronic Air Cleaner

The furnace is wired for humidifier and/or electronic air cleaner

connection.

REDUCED FURNACE LIFE HAZARD
Failure to follow this caution may result in reduced

furnace life.
Do NOT exceed 115V/1.0 amp. maximum current

load for both the EAC terminal and the HUM

terminal combined.

HUMIDIFIER - The 24V HUM is energized when the pressure
switch closes ona call for heat. The 115V HUM (called HUM on

control) is energized when the inducer is energized.
ELECTRONIC AIR CLEANER - EAC is energized when there

is a blower speed call, except is NOT energized when blower
operates in the hard-wired continuous fan mode.

FurnaceControl

The furnace control is preset at the factory with a fixed blower ON

delay of 30 seconds in the heating mode. The blower OFF timing is
preset at 140 seconds. If desired, the fan OFF delay can be reset

to obtain the longest delay times while still maintaining comfort

levels. See "Furnace Wiring Diagram".

Electrical Connections

NOTE:Junction Box can be
mountedtoeitherthe left or right

side.

115V,60 Hz

Gr=_=_nd Box

NOTE: 115VAC/60Hz/single-phase

Operating voltage range*: 127 VAC max, 104 VAC min.

* Permissible limits of voltaqe at which unit will operate satisfactorily

tion

LT_WrrY°l_tlage

Board

.J

J 25-24-90-2

.J

f

J

J

44001 102404

FurnaceControlFuse

The 24V circuit contains a 5-amp, automotive-type fuse located

on furnace control. (See Figure 35) Any electrical shorts of 24V
wiring during installation, service, or maintenance may cause fuse

to blow. If fuse replacement is required, use only a fuse of identical

size (5 amp.)

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Control Board

Diagnostic Light

115VAC

.......-HUM

1_ "_ ..... EAC

\'_L 25-24-98

Ductwork and Filter

CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in

personal injury or death.
Do NOT draw return air from inside a closet or utility

room where furnace is located. Return air duct
MUST be sealed to furnace casing.

Installation

NOTE: Design and install the air distribution system to comply with

Air Conditioning Contractors of America manuals and/or NFPA

pamphlets 90A and 90B or other approved methods that conform

to local codes and good trade practices.

1. When furnace supply ducts carry air outside furnace area,
seal return air duct to furnace casing and terminate duct
outside furnace space.

2.

Install air conditioning cooling coil (evaporator) on outlet
side of furnace.

3.

For furnaces installed without a cooling coil it is
recommended that the outlet duct be provided with a
removable access panel. This panel should be accessible

when the furnace is installed so the exterior of the heat
exchanger can be viewed for inspections. The access panel

MUST be sealed to prevent leaks.

4.

If separate evaporator and blower units are used, install
good sealing dampers for air flow control. Chilled air going

through the furnace could cause condensation and shorten
the furnace life.

NOTE: Dampers (field supplied) can be either automatic or
manual. Manually operated dampers MUST be equipped with a
means to prevent furnace or air conditioning operation unless
damper is in the full heat or cool position.

CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in death

or personal injury.
Cool air passing over heat exchanger can cause

condensate to form resulting in heat exchanger

failure.

Connections

NOTE: On upflow installations, return air can enter through either
side, both sides, or the bottom. On horizontal or downflow
installations the return air must enter through the knockout
opening in the lower panel of the furnace. Return air can not enter

through rear of the furnace. When the furnace is located in an area

near or adjacent to the living area, the system should be carefully
designed with returns to minimize noise transmission through the
return grille. Any blower moving a high volume of air will produce
audible noise which could be objectionable to when the unit is
located very close to living areas. It is advisable to route the return
air ducts under the floor or through the attic.

1. For side connections using a 16" x 25" (406.4 x 635mm)
filter, cut out the embossed area shown in Figure 36. This

wilt provide a 141/2" x 221/2" (368.3 x 571.5mm)
approximate opening.

44001 102404

39

Specifications are subject to change without notice

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Side Return Air Cutout

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A = 141/2,,Heightof Cutout for 16"x 25" Filter
B = 221/2 ,, Width of Cutout for 16"x 25" Filter

EmbossedArea J
on Side of Furnace ";k

f

NOTE: Furnaces with 5 ton cooling rating may require both
(left and right) side return or one side and bottom return (see
notes in Circulation Air Blower Data). Side return air duet(s) is

not permitted with horizontal or downflow furnace
installation.

2. Bottom returns can be made by removing the knockout
panel in the furnace base. Do NOT remove knock-out

except for a bottom return.

3. Installation of locking-type dampers are recommended in all
branches, or in individual ducts to balance system's air flow.

4. Non-combustible, flexible duct connectors are
recommended for return and supply connections to

furnace.

5. If air return grille is located close to the fan inlet, install at
least one, 90° air turn between fan and inlet grille to reduce

noise.

NOTE: To further reduce noise, install acoustical air turning vanes
and/or line the inside of duct with acoustical material.

Sizing

Existing or new ductwork MUST be sized to handle the correct
amount of airflow for either heating only or heating and air
conditioning.

Insulation

1. Insulate ductwork installed in attics or other areas exposed

to outside temperatures with a minimum of 2" (50.8mm)

insulation and vapor barrier.

2. Insulate ductwork in indoor unconditioned areas with a
minimum of 1" (25.4mm) insulation with indoor type vapor

barrier.

Filters

A Filter must be used:

Filters are not supplied with these furnaces, but can be purchased

from the distributor.

Use either filter type:

* Washable, high velocity filters are based on a maximum

air flow rating of 600 FPM.

* Disposable, low velocity filters are based on a maximum

air flow of 300 FPM when used with filter grille.

* SeeCirculating Air Blower Data for additional data.

NOTE: Disposable, low velocity filters may be replaced with
washable, high velocity filter providing they meet the minimum
size areas. Washable, high velocity filters can be replaced ONLY
with same type and size.

Side Mounted Filter Rack

i}

li

25-20-90

FilterInstallationusingOptionalFilterRack

When installing or removing a bottom mounted filter, slide the two

side filter clips to the back of the furnace BEFORE installing or
removing. This will allow the filter to clear the front raised edge of

the furnace. Insert filter into side clips first and push filter back until

it is fully engaged into back clip. When filter is in place, slide clips
back into place midway on filter as shown in Figure 38 and

Figure 39.

Bottom Mounted Filter Rack in(mm)

Center Clip

side-to-side\\

26 Ga. Galvanized Steel

FAST part number 1008482

Refer to Figure 40 and for guidelines to install filters. Furnaces
which require larger filter media and have limited clearances on
one side of furnace, require a standoff filter rack, see Figure 40,
available from your distributor.

\ jz 1

9"_,_ 25-24-18-1

(228.6)

Slide filter clips towards back before removing

Filter Clip Construction in(mm)

3" (76.2)

1V4" (31.8)

"_\_ 11/lO"(27)

40

Specifications are subject to change without notice

44001 102404

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

UsingOptional

Standoff Filter

Rack

Standoff Filter Rack

J

REDUCED FURNACE LIFE HAZARD
Failure to follow this caution may result in reduced

furnace life.
If filters are only suitable for heating application,

advise homeowner that filter size may need to be
increased if air conditionin,cj is added.

AdditionOfAir Conditioning

When a refrigeration coil is used in conjunction with this unit, it

must be installed parallel with or on the discharge side ofthe unit to
avoid condensation on the heat exchanger. All furnaces are
designed with a break-away duct flange on the supply air side of

the furnace. This allows for installation in the horizontal right or

downflow applications. The coil installation instructions must be
consulted for proper coil location and installation procedures. With
a parallel flow arrangement, dampers must be installed to prevent
chilled air from entering the furnace. If manually operated dampers
are used, they must be equipped with a means to prevent
operation of either unit unless the damper is in full heat or full cool
position.

A 3" (76.2mm) clearance is required on the right side of the furnace

in order to run the copper or plastic condensate drain line.

DownflowFurnaceInstallation

Non-Combustible FloorInstallation

Fabricate a plenum to the dimensions given in Table 13, for the

furnace outlet. Plenum should be flanged, approximately 3/4"

(19.1mm) for support.
Note: The three (3) screws in the top panel of the furnace next to

the duct flange MUST be removed to provide serviceability of the

primary heat exchangers in the downflow installation

1. Position plenum through the floor and set the furnace over
the opening in the floor. If necessary, grout around the base

to seal air leaks between the base and the floor.

CombustibleFloorInstallation

FIRE HAZARD
Failure to follow this warning could result in

personal injury, death, and/or property damage.
Place furnace on noncombustible subbase on

downflow applications, unless installing on
non-combustible flooring.

The noncombustible subbase also must be used

on downflow applications in addition to a coil box
installation.

Subbasefor CombustibleFloor

NOTE: The three(3) screws inthe top panel of the furnace next to

the duct flange MUST be removed to provide serviceability of the

primary heat exchangers in the downflow installation
Note: When using the subbase for combustible floors, the

discharge air duct flanges on the furnace MUST be broken down to
provide proper fit up to the subbase. Use duct pliers to bend the
duct flanges flat onto the furnace casing. DO NOT bend the duct

flanges inward (toward the heat exchangers) as air flow

restrictions may occur.

Subbases for Combustible Floors Dimensions in(ram)

Sub-base for Sub-base for Combustible

Combustible Floors Floor Dimensions Opening In Floor

PartNumber H* J* K** L M

Opening In Typical Plenum

Base For Plenum Dimensions

P R S T

FurnaceOnly

NAHH001SB (398.5) (730.3) (369.9) (412.8)

NAHH002SB (490.5) (730.3) (462) (412.8)
NAHH003SB (582.6) (730.3) (554) 16(406.4) (412.8)

NAHH010SB (627.1) (730.3) (598.5) (412.8)

1511/16 283/4 149/16 16(406.4) 161/4

195/16 283/4 183/16 16(406.4) 161/4

2215/16 283/4 2113/16 161/4

2411/16 283/4 239/16 16(406.4) 161/4

145/8 15(381) 131/2 15 (381) 131/2

(371.5) (342.9) (342.9)

181/4 15(381) 171/8 15 (381) 171/8

(463.6) (435.6) (435.6)

217/8 193/4 193/4

(555.6) 15(381) (501.7) 15 (381) (501.7)

235/8 221/2 221/2

(600.1) 15(381) (571.5) 15 (381) (571.5)

Subbasefor CoilBox

NAHH004SB (25.4) (522.3) (369.9) (408) (412.8)

153/4 209/16 149/16 161/16 161/4

NAHH005SB 193/8 209/16 183/16 161/16 161/4

(181.1) (522.3) (462) (408) (412.8)

NAHH006SB 23(284.2) (522.3) (554) (408) (412.8)

NAHH009SB (628.7) (522.3) (598.5) (408) (412.8)

243/4 209/16 239/16 161/16 161/4

209/16 2113/16 161/16 161/4

145/8 131/2 131/2

(371.5) 15(381) (342.9) 15 (381) (342.9)

181/4 171/8 171/8

(463.6) (435.6) (435.6)

217/8 193/4 193/4

(555.6) 15(381) (501.7) 15 (381) (501.7)

235/8 221/2 221/2

(600.1) 15(381) (571.5) 15 (381) (571.5)

15(381) 15(381)

OutsideDimension

** BaseSpacerSideToSide
Conversion:1in=25.4mm

44001 102404 41

Specifications are subject to change without notice

The Subbase for Combustible Floors MUST be used when a

downflow furnace is set on a combustible floor, even when the

furnace is installed on a coil box.

1. Cut the opening in the floor according to Table 13. The hole
in the floor must be cut to the dimensions listed in Table 13

since the base is equipped with locating tabs that center the
base over the opening.

The opening in the base is 11/4" (31.8mm) shorter and 11/8"

(28.6mm) narrower than the recommended size of the opening in

the floor. This is done to maintain clearance between the floor and
the plenum.

2. Fabricate the plenum to the dimensions given in Table 13.
Note that the dimensions given are outside dimensions.

3. Set the base over the opening in the floor, centering it over

the opening. Fasten the base to the floor with screws or

nails. See Figure 41, Figure 42 and Figure 43.

4. Drop the plenum through the opening in the base. The

flange of the plenum should rest on top of the subbase.

5. Position furnace or coil cabinet and furnace on subbase so it
aligns between the locating tabs.

This subbase for combustible floors has been designed so that the

height of the subbase raises the downflow coil off the floor to allow
easy installation of the condensate drain. See Figure 44.

Exploded View of Sub-Base for
Furnace ONLY

T S

iiiiiiliiiiiiiiiiii,Ii!iIiilii!iiiiiiiiI iiiiiili!!iiIii ii:iii! ii

,,,_,. _r- ====, Exploded View of Base for

Downflow Cased Coil

_ s

21/2 " (63.5mm)

J2

2

1t/2"(38.1mm)

iliii'ili i ii!!i

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

. :!!i, ip

_..\_ ...Hole In Floor.//"

Setting the Subbase

Furnace/Coil

Installation of
Combustible
Floor Base

\ i

Combustible
Floor Base

I

2"

(50.8ram)

A = 4 1/4" (108mm) Minimum clearance from back of hole to wall or other
obstruction.

2" (5O.8mm)

1 t, (25.4mm)

25-20-46

Checks and Adjustments

NOTE: Verify the input rate of the furnace.

FIRE OR EXPLOSION HAZARD

Failure to follow this warning could result in
personal injury, death and/or property damage.

Turn OFF gas at shut off before connecting
manometer.

-<.< ::::: i _- _Wood Floor

Wood Screw :_/ .....

iiii;I11iiiii!ii!1iiiiiii!iiiiiiiiiiii!i!!iiiiiii!!!iiiiiiii;

i / "\ : P enum 25-20-46a

b'

ililII'ii!II!! I i iiiiliCondensate Line Raised by Base

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

25-20-52

Startup

NOTE: Refer to the start-up procedures in the "User's Information

Manual" or to the "Operating Instructions Label" on the furnace.

GasSupplyPressure

Gas supply pressure should be within minimum and maximum

values listed on rating plate. Pressures are usually set by gas

suppliers.

42

Specifications are subject to change without notice

44001 102404

FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in

personal injury, death and/or property damage.
If any sparks, odors or unusual noises occur,

immediately shut OFF power to furnace. Check for
wiring errors or obstruction to blower.

ManifoldGas PressureAdjustment

NOTE: Make adjustment to manifold pressure with burners

operating.

1. Remove the burner compartment door.

2. Remove the blower compartment door. Place a jumper
across furnace controls R to W. Replace blower
compartment door.

3. With gas OFF, connect manometer to tapped opening on
gas valve. Use manometer with a 0 to 15 inch water column

range.

4. Turn gas ON and remove adjustment screw cover on gas

valve. Turn adjusting screw counterclockwise to decrease

manifold pressure and clockwise to increase pressure.

Typical Gas Control Valve

RegulatorAdjustrnent
UnderCap \

j,

I

, "_ OUTLET

• Pressure
Tap

Outlet

1/8 NPT

Example (BTUH)

Natural Gas BTU Per
BTU Content Hour

No. of Time Per
Seconds Cubic Foot in
Per Hour Seconds

1,000 3,600 48 75,000

1,000 x 3,600 +48 = 75,000 BTUH

TO Determine the appliance kW input rate from a .05m 3 test dial
that has been clocked at 80 seconds for one complete revolution.

Example (kW)

Number of

seconds per seconds per Size of test dial kW m3/h

hour complete (.05m 3)

3,600 80 .05 2.25

Number of

rotation

3,600 + 80x .05 = 7.2 m3/h

2.25m3/h x 10.35kWh/m3 = 23.28 kW

23.28 x 3.412 = 79,431 BTU

3. Remove jumper wire from R to W.

4. Relight atl appliances and ensure atl pilots are operating.

Main BurnerFlameCheck

Allow the furnace to run approximately 10 minutes then inspect the

main burner. See Figure 46.
Check for the following (Figure 46):

• Stable and blue flames. Dust may cause orange tips or
wisps of yellow, but flames MUST NOT have solid, yellow

tips.

• Flames extending directly from burner into heat
exchanger.

• Flames do NOT touch sides of heat exchanger.

If any problems with main burner flames are noted, it may be
necessary to adjust gas pressures, or check for drafts.

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

iii i

Main Burner

NOTE: Adjustment screw cover MUST be replaced on gas control

valve before reading manifold pressure and operating furnace.

5. Set manifold pressure to value as shown in Table 9,
Table 10, Table 11 or Table 12 under GAS SUPPLY AND

PIPING section in this manual.

6. When the manifold pressure is properly set, replace the

adjustment screw cover on the gas control valve.

7. Remove blower compartment door. Remove jumper wire
from thermostat connection on furnace control board.

Remove manometer connection from manifold pressure

tap, and replace plug in manifold.

8. Check for leaks at plug.

9. Replace the burner and blower compartment doors.

NaturalGas InputRatingCheck

NOTE: The gas meter can be used to measure input to furnace.
Rating is based on a natural gas BTU content of 1,000 BTU's per
cubic foot. Check with gas supplier for actual BTU content.

1. Turn OFF gas supply to alt appliances and start furnace.

Use jumper wire on R to W for Heat.

2. Time how many seconds ittakes the smallest dial on the gas

meter to make one complete revolution. Refer to Example.
NOTE: If meter uses a 2 cubic foot dial, divide results
(seconds) by two.

10-10-78

NOTE: For Ignitor location see Figure 47.

Ignitor Location in(mm)

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

21/16(52..4)

i I

NOTE: Flame sensor has a different orientation in all 050 models.

44001 102404

43

Specifications are subject to change without notice

TemperatureRise Check

The blower speed MUST be set to give the correct air temperature

rise through the furnace as marked on the rating plate.

Temperature rise is the difference between supply and return air
temperatures.
To check temperature rise,use the following procedure:

1. Place thermometers in supply and return air registers as

close to furnace as possible, avoiding direct radiant heat

from heat exchangers.

2. Operate furnace continuously for 15 minutes with all

registers and duct dampers open.

3. Take reading and compare with range specified on rating

plate.

4. If the correct amount of temperature rise is NOT obtained, it

may be necessary to change blower speed. A higher blower
speed will lower the temperature rise. A lower blower speed
will increase the temperature rise.

ChangingBlowerSpeed

ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in

personal injury or death.
Turn OFF power, lockout and tag switch with a

suitable warning label, to furnace before changing
speed taps.

NOTE: The speed taps that the manufacturer sets from the factory

for this product are based on a nominal 400 CFM per ton cooling

and the basic mid range on the temperature rise for heating.
Since the manufacturer cannot establish the static pressure

that will be applied to the unit, it is the responsibility of the
installer dealer/contractor to select the proper speed taps for

the application when the unit is installed.

If it is necessary to change speeds, refer to steps below.

REDUCED FURNACE LIFE HAZARD
Failure to follow this caution may result in reduced

furnace life.

Use ONLY the blower motor speed taps insert
indicated in the Circulation Air Blower Data for

setting air temperature rise.

Blower Speed Chart

Wire Color

Black

Orange*

Blue

Red

* Med-High speed may not be provided on all models.

Motor Speed

High

Med-High

Medium

Low

2. Change the heat or cool blower motor speed by removing
the motor lead from the "Heat" or "Cool" terminal and

replace it with the desired motor speed lead from the
"Unused Motor Lead" location. Connect the wire

previously removed from the "Heat" or "Cool" terminal to
the vacated "Unused Motor Lead" terminal.

3. If the same speed must be used for both heating and
cooling, remove the undesired motor speed lead from the

"Heat" or "Cool" terminal and connect that lead to the open
terminal at"Unused Motor Lead" location. Attach a jumper
between the "Heat" and "Cool" terminals and the remaining
motor speed lead.

Note: For motors with (4) speed leads, it will be necessary
to tape off the terminal of the motor speed lead removed
from the "Heat" or "Cool" terminal with electrical tape since
an open terminal will not be available at the "Unused Motor

Lead" location.

Continuous-Fan Operation using "G"

Energizing the "G" terminal on the furnace control provides
continuous fan operation. This is done by connecting the G

terminal of the thermostat to the G terminal on the furnace control.
When the FAN switch is turned from auto to ON the fan will operate

continuously at "HEAT" speed. EAC will be energized in this
mode.

NOTE: In heating, the fan will turn off during furnace ignition and
warm up then restart at heating speed.

Hard Wired ContinuousFan Operation

A terminal is provided on the furnace control board located in the

circulating blower compartment for operation of the continuous fan
option. This connection is intended for the low speed motor tap,

and has a lower contact rating (8 amps) than the heat and cool
taps. When the low speed blower lead is connected to this
terminal, this wilt provide low speed blower operation whenever
the other two speeds (Heat or Cool) are not energized.

Thoroughly check the system after modification to ensure the

proper operation of the circulating air blower in all modes of

operation.

Separatespeedselectionsfor Heat, Cool,and

ContinuousFan

Connect low speed lead from circulating motor to the "Cont."
terminal at the furnace control. The appropriate motor leads

should already be connected to the "Heat" and "coor' terminals.

Heating and Continuous Blower Speed the

Same

If it is necessary to operate the heating speed and continuous

blower speed using the same blower speed, connect a jumper

between the "Heat" and "Cont." terminals on the furnace control.

Note: There should be only ONE motor lead going to the "Heat"

and "Cont." terminals.

Refer to Furnace Wiring Diagram for location of the heating
and cooling speed taps located on the furnace control as
well as location of unused blower motor speed leads. Use

the chart (Table 14) to determine the blower motor speed

settings.

44

Specifications are subject to change without notice

44001 102404

Furnace Maintenance

See "User's Information Manual".

FIRE, EXPLOSION, OR CARBON MONOXIDE
HAZARD

Failure to follow this warning could result in
personal injury or death.

It is recommended that the furnace be inspected
and serviced on an annual basis (before the heating
season) by a qualified service technician.

ELECTRICAL SHOCK, FIRE OR EXPLOSION
HAZARD

Failure to follow this warning could result
personal injury, death and/or property damage.

Before servicing, disconnect all electrical power
to furnace.

• When servicing controls, label all wires prior to
disconnecting. Reconnect wires correctly.

• Verify proper operation after servicing.

in

44001 102404

45

Specifications are subject to change without notice

Sequence of Operation & Diagnostics

The following is the normal operating sequence.

Cooling(Y) Request:

24VAC signals applied to Y & G terminals of FCB (furnace control board)

• Cool motor speed is energized after 5 second Cool Fan On Delay time.

Y & G signals removed from FCB

• Cool motor speed is de-energized after 90 second Cool Fan Off Delay time.

ContinuousCirculatingFan (G) Request:

24 VAC signal is applied to G terminal of the FCB.

• Heat motor speed is energized without delay.
G signal removed from FCB.

• Heat motor speed is de-energized after 5 second delay.
NOTE 1) Furnace de-energizes the fan during the heat exchanger warm-up period ona call for Heating that occurs during a G request

unless a blower motor lead is connected to the Cont terminal on the FOB, in which case see NOTE 2).
NOTE 2) Heating or Cooling requests received during a Fan request cause the fan speed to change to the appropriate heat or cool

speed after the Fan on Delay time expires. The fan returns to continuous circulating speed after the selected Fan Off Delay time
expires following loss of the Heating or Cooling request.

ContinuousCirculatingFanHard-Wired (Cont)Request:

Field selected low speed motor tap installed on "CONT" terminal.

• Low speed is energized when power applied to furnace. Operates at this speed continuously while there are no other
blower demands from furnace control. Fan demands from furnace control for heat, cool or "G" will override hard-wired speed tap.

NOTE 3) EAC is NOT active for hard-wired mode but IS active for fan demands from furnace control for heat, cool and "G".

Heating(W) Request:

Heating (W) Request:

• 24 VAC signal applied to W terminal of FOB.

• Inducer motor turns on and the pressure switch(es) close(s).

• Following a 15 second prepurge delay, after the pressure switches closes, the igniter begins a 17second warm-up.

• The gas valve is energized, the main burners light and flame is sensed.

• The igniter is de-energized after the main burners ignite.

• FOB will delay blower operation for the 30 seconds timed from the opening of the gas valve.

W signal removed from FCB.

• The gas valve de-energizes and the main burners go out.

• The inducer runs for a 15 second postpurge period.

• The fan stays at Heat speed.

• The fan de-energizes after the selected Heat Fan Off Delay time expires, timed from the gas valve de-energizing.
HUMIDIFIER - The 24V HUM is energized when the pressure switch closes on a call for heat. The 115V HUM (called HUM on Control)

is energized when the inducer is energized.
ELECTRONIC AIR CLEANER - EAC is energized when there is a blower speed call. It is NOT energized when blower operates inthe

hard-wired continuous fan mode.
NOTE 4) If a new Heating request arrives while the control is waiting in the Heat Fan Off Delay time, the FCB will wait for the selected

Heat Fan Off Delay then start a new heating cycle as long as the heat call remains.

46 44001 102404

Specifications are subject to change without notice

HeatingRequestwith Gas ShutOff:

24 VAC signal applied to W terminal of FCB.

The FOB will attempt 4 cycles for ignition then go to soft lockout for 3 hours then try for ignition again as long as the heat call remains.

Power reset will clear lockout.

• Inducer motor turns on

• Following a 15 second prepurge delay, the igniter begins warm up.

• The igniter glows red-hot for 22 seconds, then turns off. The FOB flashes error code 6.

• The igniter stays off for 17 seconds, then begins to warm up again.

• The igniter glows red hot for 22 seconds then turns off. The FOB continues flashing error code 6.

• The igniter stays off for 17 seconds, then begins to warm up again.

• The igniter glows red hot for 22 seconds then turns off. The FOB continues flashing error code 6.

• The igniter stays off for 17 seconds, then begins to warm up again.

• The igniter glows red hot for 22 seconds then turns off. The FOB proceeds to soft lockout and stops flashing error code 6 and begins
flashing error code 6 + 1.

• The inducer motor de-energizes after a 15 second post purge.

ControlBoard DiagnosticCodes (SeeFigure48)

OFF = 24VAC or 115VAC is off, fuse is open
Heartbeat = Normal operation or no previous Diagnostic Code

ON SOLID = Soft Lockout - Furnace Control Error (1 hr delay)

1 Flash = Not used
2 Flashes = Pressure switch(es) closed when should be open
3 Flashes = Pressure switch open when should be closed

4 Flashes = Limit or roll-out switch open (less than 2 minutes)
5 Flashes = Flame sensed out of sequence
6 Flashes = Failure to ignite or flame sense lost while running

6 + 1 Flashes = Soft Lockout - Max trials for ignition reached (3 hr delay)
7 Flashes = Soft Lockout - Limit or roll-out switch open longer than 2 minutes (1 hr delay)

8 Flashes = Permanent Lockout - Gas valve relay contact stuck closed or miswired gas valve (power reset only)
10 Flashes = Line voltage (115VAC) polarity reversed. If twinned, refer to twinning kit instructions

* If status code recall is needed, briefly (2-3 seconds) remove then reconnect one limit switch wire (main or rollout) to display last stored

status code. Do not remove power or blower door before initiating status code recall or code will be lost. Code is automatically cleared
after 72 hours or upon power reset.

If code repeats immediately following power reset then replace control

(roll-out switch requires manual reset)

* Proper flame sense microamps: 0.7 microamps D.C. minimum

Oontro, oor

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

.--. DiagnosticLight

_'q_G_i 115 VAC

_> _.,____....... HUM

25-24-98

2.0 - 4.0 microamps nominal

44001 102404 47

Specifications are subject to change without notice

Four Position Furnace

Models

Single Pipe

N9MPIO4OB08C2
N9MP1050B12C2

N9MP1060B12C2
N9MP1075B12C2

N9MP1080F16C2

N9MP1100F14C2
N9MP1100J20C2

N9MP1125J20C2

or

Dual Certified

N9MP2050B12C2
N9MP2075B12C2
N9MP2080F16C2
N9M P2100F14C2

N9M P2100J20C2
N9M P2125J20C2

* Denotes Brand

Dual Certified

N9MPD040F08A2
N9MPD050F12A2

N9MPD060F12A2
N9MPD075F12A2

N9M PD080J 16A2
N9MPD100J14A2
N9MPD100J20A2

N9MPD125L20A2

or

Dual Certified

*9MPDO50F12C2
*9MPDO75F12C2

*9M PDO80J 16C2
*9M PD100J14C2

*9MPDIOOJ20C2
*9MPD125L20C2

International Comfort Products, LLC

Lewisburg, TN 37091 U.S.A.

Save This Manual For Future Reference

48

44001 102403

Specifications are subject to change without notice

Model Specifications

ManufacturersNumber (Mfr No-See RatingPlate)ALL Models

Specifications (NgMP1)

N9MP1040B08C N9MP1050B12C N9MP1060B12C N9MP1075B12C

General

GasType
Input(Btuh)
Output(Btuh)

TransformerSize (VA)
T'statHeatAnticipator
Temp.Rise(°F/°C)

Electrical(VoIts/Hz/FLA)
RatingPlateAmps
Gas& Ignition

GasType
GasValve (Honeywell)

RegulationType
IgnitionType/Series

ManifoldPress.(inwc/Pa)
Std.MainOrifices(No/Size)

FurnaceControls
FurnaceControl(Type)

FurnaceControl On
(Timed-secs) Off

Combustion
FlueOutletSize(inches)

Std.OutletTemp° (lessthan)5' (1.5m)No Elbows(°F/°C)
BlowerPressure5' (1.5m)NoElbows(in wc/Pa)

BlowerPressure40' (12.2m)+5-90° DWVElbows(inwc/Pa)
Transition Bx Pressure 5' (1.5m)No Elbows(inwc/Pa)

TransitionBx Pressure40' +5-90° DWVElbows(inwc/Pa)

Limits&Controls
RolloutSwitch(°F/°C)

LimitControlSetting (°F/°C)
StandardPressureSw.(PartNo)

BlowerSwitchPressure(Close)(in wc/Pa)
BlowerSwitchPressure(Open)(inwc/Pa)

TransitionSwitchPressure(Close)(inwc/Pa)
TransitionSwitchPressure(Open)(inwc/Pa)

HighAltitudePressureSw. (PartNo)

BlowerSwitchPressure(CIose)(inwc/Pa)

BlowerSwitchPressure(Open)(inwc/Pa)
TransitionSwitchPressure(C]ose)(inwc/Pa)
TransitionSwitchPressure(Open)(inwc/Pa)

LongVentKit(PartNo)
PressureSwitch (PartNo)

BlowerSwitchPressure(CIose)(inwc/Pa)

BlowerSwitchPressure(Open)(inwc/Pa)
TransitionSwitchPressure(Close)(inwc/Pa)

TransitionSwitchPressure(Open)(inwc/Pa)

HighAltitudeLongVent Kit (PartNo)
PressureSwitch (PartNo)

BlowerSwitchPressure(Close)(in wc/Pa)

BlowerSwitchPressure(Open)(inwc/Pa)
TransitionSwitchPressure(Close)(inwc/Pa)
TransitionSwitchPressure(Open)(inwc/Pa)

Blower Data
BlowerSizeDx W in(mm)

MotorAmps/RPM
MotorType/H.R

Cap.Mfd/Volts
FilterType&Size in(mm)(qty.)

Permanent- notsupplied

CoolCap. (Tons)@ .5 in wc (125Pa)L, ML,MHi & Hi
GasConversion Kitsfor 50k &75k GasConversion Kits for 40k& 60k

Natto Propane NAHA001LP(1172958") NattoPropane NAHA003LP(1174906")
PropanetoNat NAHA001NG (1172960") Propaneto Nat NAHA004NG(1174907")

*Order from Service Parts *Order from Service Parts

Nat./Propane

40,000
36,000

40

.50

40-70/22-38

115/60/5.0

8.4

Nat. Propane

3.5_72 10.0_490 3.5_72 10.0_490 3.5_72 10.0_490 3.5_72 10.0_490
2_4 2._5 2_2 2_4 3_4 3_5 3_2 3_4

2

140/60

-2.0/-498

-1.85/-710

-2.05/-511

-1.75/-187

300/149
220/1O4

1175725

-0.80/-199

-0.65/-162

-0.75/-187

-0.60/-149

11 x 8(279 x 203)

5.0/960
PSC/1/4

7.5/370

16x25x1 (406x635x25)

11/2,2

Nat./Propane

50,000
45,500

40

.50

35-65/19-36

115/60/9.8

12.9

Nat.

16x25x1(406x635x25)

Propane Nat.

60,100,140,180

2

140/60

-2.6/-647

-2.3/-573

300tl 49

240/116

1013802

-2.2/-548

-2.0/-498
1013803

-2.0/-498

-1.8/-448

11x 8(279x 203)

10.0/850

PSC/1/2

7.5/370

11/2,2,21/2,3

Nat./Propane

40-70_2-38

VR8205S

SNAP

HotSurface

Integrated

3O

-1.45/-361

-1.30/-324

-2.10/-523

-1.80/-448

-0.80/-199

-0.65/-162

-0.75/-187

-0.60/-149

11x 8(279x 203)

16x25x1(406x635x25)

11/2,2,21/2,3

60,000
54,000

40

.50

115/60/7.2

10.9

Propane

2

140/60

300/149

210/99

1175725

8.0/1050
PSC/1/2

7.5/370

Nat. Propane

16x25x1(406x635x25)

Nat./Propane

75,000
68,000

40

.50

40-70_2-38

115/60/8.9

10.1

2

140/60

-2.6/-647

-2.3/-573

300/149

210/99

1013802

-2.2/-548

-2.0/-498
1013803

-2.0/-498

-1.8/-448

11x 8(279x 203)

8.0/1050

PSC/1/2

7.5/370

11/2,2,21/2,3

44001 102404 Specifications are subject to change without notice. 49

Model Specifications

ManufacturersNumber (Mfr No-See RatingPlate)ALL Models

Specifications (NgMP1)

N9MP1080F16C N9MP1100F14C N9MP1100J20C N9MP1125J20C

General

GasType
Input(Btuh)
Output(Btuh)

TransformerSize (VA)
T'statHeatAnticipator
Temp.Rise(°F/°C)

Ele_rical(Volts/Hz/FLA) 115/60/9.0 115/60/9.0 115/60/10.5 115/60/11.2
RatingPlateAmps

Gas&Ignition

GasType
GasValve (Honeywell)

RegulationType
IgnitionType/Series

ManifoldPress.(inwc/Pa)
Std.MainOrifices(No/Size)

FurnaceControls

FurnaceControl(Type)
FurnaceControl On

(Timed-secs) Off
Combustion

FlueOutletSize(Inches)
Std.OutletTemp° (lessthan)5' (1.5m)No Elbows(°F/°C)

BlowerPressure5' (1.5m)NoElbows(in wc/Pa)
BlowerPressure40' (12.2m)+5-90° DWVElbows(inwc/Pa)
Transition Bx Pressure 5' (1.5m)No Elbows(inwc/Pa)

TransitionBxPressure40'(12.2m)+5-90° DWVElbows(inwc/Pa)

Limits&Controls
RolloutSwitch(°F/°C)
UmitControlSetting (°F/°C)

StandardPressureSw.(PartNo)

BlowerSwitchPressure(Close)(in wc/Pa)
BlowerSwitchPressure(Open)(inwc/Pa)

TransitionSwitchPressure(Close)(inwc/Pa)
TransitionSwitchPressure(Open)(inwc/Pa)

HighAltitudePressureSw. (PartNo)

BlowerSwitchPressure(Ciose)0nwc/Pa)
BlowerSwitchPressure(Open)0nwc/Pa)

TransitionSwitchPressure(Ciose)0nwc/Pa)
TransitionSwitchPressure(Open)(inwc/Pa)

LongVentKit (PartNo)
PressureSwitch (PartNo)

BlowerSwitchPressure(Ciose)0nwc/Pa)

BlowerSwitchPressure(Open)(inwc/Pa)
TransitionSwitchPressure(Close)(inwc/Pa)
TransitionSwitchPressure(Open)(inwc/Pa)

HighAltitudeLongVent Kit (PartNo)
PressureSwitch (PartNo)

BlowerSwitchPressure(Close)(in wc/Pa)

BlowerSwitchPressure(Open)(inwc/Pa)
TransitionSwitchPressure(Close)(inwc/Pa)

TransitionSwitchPressure(Open)0nwc/Pa)

Blower Data
BlowerSizeDx W in(mm)
MotorAmps/RPM
MotorType/H.R
Cap.Mfd/Volts

FilterType&Sizein(mm)(qty.)Permanent- notsupplied
CoolCap. (Tons)@ .5 in wc (125Pa)L, ML,MHi & Hi

GasConversion Kitsfor 100k& 125k
Natto Propane

PropanetoNat

*Order from Service Parts

NAHA001LP(1172958")
NAHA001NG(1172960")

Nat./Propane

80,000
72,000

40

.50

35-65/19-36

12.9

Nat.

3.5/872
4/44

11x 8(279x 203)

16x25x1(406x635x25)

Propane

10.0/2490
4/55

2

140/60

-2.6/-647

-2.5/-623

300/149

230/110

1013811

-1.8/-448

-1.6/-398
1013812

-1.5/-374

-1.3/-324

10/1050
PSC/1/2

10/370

21/2,3,31/2,4

Nat./Propane

100,000

91,000

40

.50

40-70_2-38

10.1 14.4 15.0

Nat.

3.5/872
4/42

16x25x1(406x635x25)

GasConversionKitsfor 80k

NattoPropane
Propaneto Nat

*Order from Service Parts

Propane Nat.

VR8205S

SNAP

HotSurface

10.0/2490 3.5/872
4/54 4/42

Integrated

30

60,100,140,180

3

140/60

-1.8/-448

-1.7/-243

-2.6/-647

-2.5/-623

300/149

230/110

1013801

-2.3/-573

-2.1/-523

1013803

-2.0/-498

-1.8/-448

NAHA001LV

1013518

-1.0/-249

-0.8/-199

-2.0/-498

-1.8/-448
NAHA003LV

1013165

-0.7/-423

-0.6/-149

-1.4/-349

-1.2/-299

11x 8(279x 203)

10/1050
PSC/1/2

10/370

11/2,2,3,31/2,

Nat./Propane

100,000

96,500

40

.50

40-70_2-38

Propane Nat. Propane

10.0/2490 3.5/872 10.0/2490
4/54 5/42 5/54

3

140/60

-1.8/-448

-1.7/-243

-2.6/-647

-2.5/-623

300/149
220/104

1013802

-2.2/-548

-2.0/-498

1013803

-2.0/-498

-1.8/-448

NAHA001LV

1013518

-1.0/-249

-0.8/-199

-2.0/-498

-1.8/-448

11x 8(279x 203)

13/900

PSC/3/4

40/370

16x25x1(406x635x25)(2)

31/2,4,41/2,5

NAHA003LP(1174906")
NAHA004NG(1174907")

Nat./Propane

125,000
113,750

4O

.50

40-70_2-38

3

140/60

-1.8/-448

-1.7/-243

-2.6/-647

-2.5/-623

300/149

190/88

1013166

-1.3/-234

-1.1/-274

-1.8/-448

-1.6/-398
1013157

-0.9/-224

-0.7/-174

-1.7/-423

-1.5/-374

11x 8(279x 203)

13/900

PSCf3/4

40/370

16x25x1(406x635x25)(2)

31/2,4,41/2,5

50 Specifications are subject to change without notice. 44001 102404

Model Specifications

ManufacturersNumber (Mfr No-See RatingPlate)ALL Models

Specifications (NgMP2)

N9MP2050B12C N9MP2075B12C N9MP2080F16C N9MP2100F14C N9MP2100J20C N9MP2125J20C

General

GasType
Input(Btuh)
Output(Btuh)

TransformerSize (VA)
T'statHeatAnticipator
Temp.Rise(°F/°C)

Electrical(VoIts/Hz/FLA) 115/60/9.8 115/60/8.9 115/60/9.0 115/60/9.0 115/60/10.5 115/60/11.2
RatingPlateAmps

Gas &Ignition

GasType
GasValve(Honeywell)

RegulationType
IgnitionType/Series

ManifoldPress.(inwc/Pa)
Std. MainOrifices(No/Size)

FurnaceControls

FurnaceControl(Type)
FurnaceControl On

(Timed-secs) Off

Combustion
FlueOutletSize (Inches)

Std. OutletTemp° (lessthan) 5' (1.5m) No Elbows(°F/°C)
BlowerPressure5' (1.5m)NoElbows(inwc/Pa)

BlowerPressure40'(12.2m)+5-90°DWVElbows(inwc/Pa)
Transition Bx Pressure5' (1.5m)No Elbows(in wc/Pa)

TransitionBxPressure40' (12.2m)+5-90° DWVElbows

(inwc/Pa)

Limits & Controls
RolloutSwitch (°F/°C)

UmitControlSetting(°F/°C)

StandardPressureSw.(PadNo)

BlowerSwitchPressure(Close)0nwdPa)
BlowerSwitchPressure(Open)(in wc/Pa)

TransitionSwitchPressure(Close)0nwc/Pa)
TransitionSwitchPressure(Open)(inwc/Pa)

HighAltitudePressureSw.(PadNo)

BlowerSwitchPressure(Close)(inwc/Pa)
BlowerSwitchPressure(Open)(in wc/Pa)
TransitionSwitchPressure(Close)(in wc/Pa)

TransitionSwitchPressure(Open)0nwc/Pa)

LongVentKit (PadNo)

PressureSwitch (PadNo)

BlowerSwitchPressure(Close)(inwdPa)
BlowerSwitchPressure(Open)(in wc/Pa)
TransitionSwitchPressure(Close)(in wc/Pa)

TransitionSwitchPressure(Open)(inwc/Pa)

HighAltitudeLongVentKit (PadNo)
PressureSwitch (PadNo)

BlowerSwitchPressure(Close)(inwclPa))
BlowerSwitchPressure(Open)(in wc/Pa)

TransitionSwitchPressure(Close)(in wc/Pa)
TransitionSwitchPressure(Open)(inwc/Pa)

BlowerData

BlowerSize Dx W in(mm)
MotorAmps/Rpm

MotorType/H.R
Cap.Mfd/Volts
FilterType & Sizein(mm)(qty.),

Permanent- notsupplied

Cool Cap.(Tons)@.5 inwc (125Pa)L,ML, MHi& Hi
GasConversionKitsfor 50k, 75k, 100k&125k Gas ConversionKitsfor 80k

Natto Propane NAHA001LP (1172958") Natto Propane NAHA003LP(1174906")
Propaneto Nat NAHA001NG(1172960") PropanetoNat NAHA004NG(1174907")

*Order from Service Parts *Order from Service Parts

Nat./Propane

50,000
45,500

40

.50

35-65/19-36

12.9

Nat.

Propane

3.5/872

10.0/24£0

2/42

11x 8(279x 203)

2/54

2

140/60

-2.6/-647

-2.3/-573

300/149
240/116

1013802

-2.2/-548

-2.0/-498
1013803

-2.0/-498

-1.8/-448

10/850

PSC/1/2

7.5/370

16x25x1

(406x635x25)

11/2,2,21/2,3

Nat./Propane

75,000
68,000

40

.50

40-70_2-38

10.1

Nat. Propane

3.5/872 10.0_4£0 3.5/872
3_2 3_4 4_4

2

140/60

-1.8/-448

-1.3/-324

-2.6/-647

-2.3/-573

300/149

210/99

1013801

-2.3/-573

-2.1/-523

1013803

-2.0/-498

-1.8/-448

NAHA001LV

1013518

-1.0/-249

-0.8/-199

-2.0/-498

-1.8/-448

NAHA003LV

1013165

-0.7/-423

-0.6/-149

-1.4/-349

-1.2/-299

11x 8(279x 203)

8.0/1050
PSC/1/2

7.5/370

16x25x1

(406x635x25)

11/2,2,21/2,3

Nat./Propane

35-65/19-36

Nat. Propane

-2.6/-647

-2.5/-623

-1.8/-448

-1.6/-398

-1.5/-374

-1.3/-324

11x10(279x 254)

(406x635x25)

21/2,3,31/2,4

80,000
72,000

40

.50

12.9

VR8205S

SNAP

HotSurface

10.0/24£0 3.5/872
4/55 4/42

Integrated

60,100,140,180

2

140/60

300/149
230t110

1013811

1013812

10/1050
PSC/1/2

10/370

16x25x1

Nat./Propane

100,000

91,000

.50

40-70_2-38

10.1

Nat.

30

140/60

-1.8/-448

-1.7/-243

-2.6/-647

-2.5/-623

300/149
230t110

1013801

-2.3/-573

-2.1/-523

1013803

-2.0/-498

-1.8/-448

NAHA001LV

1013518

-1.0/-249

-0.8/-199

-2.0/-498

-1.8/-448

11x10(279x 254)

10/1050
PSC/1/2

10/370

16x25x1

(406x635x25)

11/2,2,3,31/2,

Nat./Propane

100,000

40

Propane Nat.

10.0/24£0 3.5/872 10.0/24£0 3.5/872 10.0/24£0
4/54 4/42 4/54 5/42 5/54

3

NAHA003LV

1013165

-0.7/-423

-0.6/-149

-1.4/-349

-1.2/-299

96,500

40
.50

40-70_2-38

14.4

Propane

3

140/60

-1.8/-448

-1.7/-243

-2.6/-647

-2.5/-623

300/149
220t104

1013802

-2.2/-548

-2.0/-498

1013803

-2.0/-498

-1.8/-448

NAHA001LV

1013518

-1.0/-249

-0.8/-199

-2.0/-498

-1.8/-448

11x10(279x 254)

13/900

PSC/3/4

40/370

16x25x1

(406x635x25)(2)

31/2,4,41/2,5

Nat./Propane

125,000

113,750

4O

.50

40-70_2-38

15.0

Nat. Propane

3

140/60

-1.8/-448

-1.7/-243

-2.6/-647

-2.5/-623

300/149

190/88

1013166

-1.3/-234

-1.1/-274

-1.8/-448

-1.6/-398
1013157

-0.9/-224

-0.7/-174

-1.7/-423

-1.5/-374

11x10(279x 254)

13/900

PSC/3/4

40/370

16x25x1

(406x635x25)(2)

31/2,4,41/2,5

44001 102404 Specifications are subject to change without notice. 51

Model Specifications

ManufacturersNumber (Mfr No-See RatingPlate)ALL Models

General

GasType
Input(Btuh)
Output(Btuh)

TransformerSize (VA)
T'statHeatAnticipator
Temp.Rise(°F/°C)

Electrical(Volts/Hz)
RatingPlateAmps
Gas& Ignition

GasType
GasValve(Honeywell)

RegulationType
IgnitionType/Series

ManifoldPress.(inwc/Pa)
Std.MainOrifices(No/Size)

FurnaceControls
FurnaceControl(Type)

FurnaceControl On
(Timed-secs) Off

Combustion
FlueOutletSize(inches)

Std.OutletTemp° (lessthan)5' NoElbows(°F/°C)
BlowerPressure5' (1.5m)NoElbows(in wc/Pa)

BlowerPressure40' (12.2m)+5-90° DWVElbows(inwc/Pa)
Transition Bx Pressure 5' (1.5m)No Elbows(inwc/Pa)

TransitionBxPressure40' (12.2m)+5-90° DWVElbows(in

wc/Pa)
Limits&Controls

RolloutSwitch(°F/°C)
UmitControlSetting (°F/°C)

StandardPressureSw.(PartNo)

BlowerSwitchPressure(Close)(in wc/Pa)
BlowerSwitchPressure(Open)(inwc/Pa)

TransitionSwitchPressure(Close)(inwc/Pa)
TransitionSwitchPressure(Open)(inwc/Pa)

HighAltitudePressureSw. (PartNo)

BlowerSwitchPressure(Close)(in wc/Pa)

BlowerSwitchPressure(Open)(inwc/Pa)
TransitionSwitchPressure(Close)(inwc/Pa)
TransitionSwitchPressure(Open)(inwc/Pa)

LongVentKit (PartNo)
PressureSwitch (PartNo)

BlowerSwitchPressure(Close)(in wc/Pa)

BlowerSwitchPressure(Open)(inwc/Pa)
TransitionSwitchPressure(Close)(inwc/Pa)

TransitionSwitchPressure(Open)(inwc/Pa)

Specifications (NgMPD)

N9MPD040F08A N9MPD050F12A N9MPD060F12A N9MPD075F12A

Nat./Propane

35-65/19-36

Nat.

3.5/872
2/44

-2.00/-249

-1.90/-473

-0.90/-224

-0.90/-224

-1.24/-309

-1.05/-261

-0.70/-174

-0.55/-137

-0.95/-237

-0.80/-199

-0.60/-149

-0.45/-112

Nat./Propane
40,000
37,000

40

.50

115/60

8.6

Propane

10.0/2490 3.5/872 10.0/2490 3.5/872 10.0/2490
2/55 2/42 2/54 3/44 3/55

2

140/60

300/149
250/121

1175818

1175819

50,000
46,000

40

.50

35-65/19-36

115/60 115/60

12.9 10.1

Nat.

Propane Nat.

VR8205S

SNAP

HotSurface

Integrated

60,100,140,180

2

140/60

-2.6/-647

-2.3/-573

300/149
260/127

1013802

-2.2/-548

-2.0/-498
1013803

-2.0/-498

-1.8/-448

Nat./Propane

60,000
55,000

40-70_2-38

30

-1.90/-473

-1.52/-379

-1.10/-274

-1.05/-398

300/149
230/110

1175726

-1.01/-252

-0.86/-214

-0.65/-162

-0.50/-125
1175819

-0.95/-237

-0.80/-199

-0.60/-149

-0.45/-112

40

.50

115/60

10.6

Propane

2

140/60

Nat./Propane

75,000
69,000

40

.50

40-70_2-38

Nat. Propane

3.5/872 10.0/2490
3/42 3/54

2

140/60

-2.6/-647

-2.3/-573

300/149
240/116

1013802

-2.2/-548

-2.0/-498
1013803

-2.0/-498

-1.8/-448

HighAltitudeLongVent Kit (PartNo)
PressureSwitch (PartNo)

BlowerSwitchPressure(Close)(in wc/Pa)
BlowerSwitchPressure(Open)(inwc/Pa)

TransitionSwitchPressure(Close)(inwc/Pa)
TransitionSwitchPressure(Open)(inwc/Pa)

Blower Data
BlowerSizeDx W in(mm)

MotorAmps/RPM
MotorType/H.R
Cap.Mfd/Volts
FilterType&Sizein(mm)(qty.)Permanent- notsupplied
CoolCap. (Tons)@ .5 in wc (125Pa)L, ML,MHi & Hi

GasConversion Kits50k& 75k
Natto Propane NAHA001LP(1172958") NAHA003LP(1174906")

PropanetoNat NAHA001NG(1172960") NAHA004NG(1174907")

*Order from Service Parts

52 Specifications are subject to change without notice. 44001 102404

11 x 8(279 x 203)

5.0_60
PSC/1/4

10.0/370

16x25x1(406x635x25)

11/2,2

11x 8(279x 203)

10.0/850
PSC/1/2

7.5/370

16x25x1(406x635x25)

11/2,2,21/2,3

GasConversion Kits for 40k &60k
Natto Propane

Propaneto Nat
*Order from Service Parts

11x 10(279x 254)

16x25x1(406x635x25)

8.0/1050
PSC/1/2

7.5/370

11/2,2,21/2,3

11x 10(279x254)

8.0/1050
PSC/1/2

7.5/370

16x25x1(406x635x25)

11/2,2,21/2,3

Model Specifications

ManufacturersNumber (Mfr No-See RatingPlate)ALL Models

Specifications (NgMPD)

N9MPD080J16A N9MPD100J14A N9MPD100J20A N9MPD125L20A

General

GasType
Input(Btuh)
Output(Btuh)

TransformerSize (VA)
T'statHeatAnticipator
Temp.Rise(°F/°C)

Eledrical(Volts/Hz) 115/60 115/60 115/60 115/60
RatingPlateAmps

Gas&Ignition

GasType
GasValve(Honeywell)

RegulationType
IgnitionType/Series

ManifoldPress.(inwc/Pa)
Std.MainOrifices(No/Size)

FurnaceControls

FurnaceControl(Type)
FurnaceControl On

(Timed-secs) Off

Combustion

FlueOutletSize(Inches)
Std.OutletTemp° (lessthan)5' (1.5m)No Elbows(°F/°C)

BlowerPressure5' (1.5m)NoElbows(in wc/Pa)
BlowerPressure40' (12.2m)+5-90° DWVElbows(inwc/Pa)

Transition Bx Pressure 5' (1.5m)No Elbows(inwc/Pa)

TransitionBxPressure40' (12.2m)+5-90° DWVElbows(in

wc/Pa)
Limits&Controls

RolloutSwitch(°F/°C)
UmitControlSetting (°F/°C)

StandardPressureSw.(PartNo)

BlowerSwitchPressure(Close)(in wc/Pa)

BlowerSwitchPressure(Open)(inwc/Pa)
TransitionSwitchPressure(Close)(inwc/Pa)
TransitionSwitchPressure(Open)(inwc/Pa)

HighAltitudePressureSw. (PartNo)

BlowerSwitchPressure(Close)(in wc/Pa)

BlowerSwitchPressure(Open)(inwc/Pa)
TransitionSwitchPressure(Close)(inwc/Pa)

TransitionSwitchPressure(Open)(inwc/Pa)

LongVentKit (PartNo)
PressureSwitch (PartNo)

BlowerSwitchPressure(Close)(in wc/Pa)

BlowerSwitchPressure(Open)(inwc/Pa)
TransitionSwitchPressure(Close)(inwc/Pa)

TransitionSwitchPressure(Open)(inwc/Pa)

HighAltitudeLongVent Kit (PartNo)
PressureSwitch (PartNo)

BlowerSwitchPressure(Close)(in wc/Pa)

BlowerSwitchPressure(Open)(inwc/Pa)
TransitionSwitchPressure(Close)(inwc/Pa)
TransitionSwitchPressure(Open)(inwc/Pa)

Blower Data
BlowerSizeDx W in(mm)

MotorAmps/Rpm
MotorType/H.R
Cap.Mfd/Volts
FilterType&Sizein(mm)(qty.)Permanent- notsupplied
CoolCap. (Tons)@ .5 in wc (125Pa)L, ML,MHi & Hi

Natto Propane
PropanetoNat

*Order from Service Parts

NAHA001LP(1172958")
NAHA001NG(1172960")

Nat./Propane

80,000
73,600

40
.50

35-65/19-36

12.9 10.1 14.4 15.0

Nat. Propane

3.5/872 10.0/2490 3.5/872
4/44 4/55 4/42

2

140/60

-2.6/-647

-2.5/-623

300/149
220/104

1013812

-1.5/-374

-1.3/-324
1013813

-1.2/-299

-1.0/-249

11x 10(279x254)

10/1050
PSC/1/2

10/370

16x25x1(406x635x25)

21/2,3,31/2,4

Nat./Propane

100,000

92,000

40
.50

40-70_2-38

Nat.

11x 10(279x254)

16x25x1(406x635x25)

GasConversionKitsfor 80kGasConversionKitsfor 100k& 125k
Natto Propane

Propaneto Nat
*Order from Service Parts

Propane Nat.

VR8205S

SNAP

HotSurface

10.0/2490 3.5/872
4/54 4/42

Integrated

30

60,100,140,180

3

140/60

-1.8/-448

-1.7/-243

-2.6/-647

-2.5/-623

300/149
220/104

1013802

-2.2/-548

-2.0/-498
1013803

-2.0/-498

-1.8/-448

NAHA002LV

1013515

-1.0/-249

-0.8/-199

-1.71-423

-1.5/-374

NAHA003LV

1013165

-0.7/-423

-0.6/-149

-1.4/-349

-1.2/-299

10/1050
PSC/1/2

10/370

11/2,2,3,31/2

Nat./Propane

100,000

92,000

40
.50

40-70_2-38

Propane Nat. Propane

10.0/2490 3.5/872 10.0/2490
4/54 5/42 5/54

3

140/60

-1.8/-448

-1.7/-243

-2.6/-647

-2.5/-623

300/149
220/104

1013802

-2.2/-548

-2.0/-498
1013803

-2.0/-498

-1.8/-448

11x 10(279x254)

13/900

PSC/3/4

40/370

16x25x1(406x635x25)(2)

31/2,4,41/2,5

NAHA003LP(1174906")
NAHA004NG(1174907")

Nat./Propane

125,000
115,000

4O
.50

40-70_2-38

140/60

-1.8/-448

-1.7/-243

-2.6/-647

-2.5/-623

300/149

190/88

1013166

-1.3/-234

-1.1/-274

-1.8/-448

-1.6/-398
1013157

-0.9/-224

-0.7/-174

-1.7/-423

-1.5/-374

11x 10(279x 254)

13/900

PSC/3/4

40/370

16x25x1(406x635x25)(2)

31/2,4,41/2,5

3

440 01 1024 04 Specifications are subject to change without notice. 53

Model Specifications

ManufacturersNumber (Mfr No-See RatingPlate)ALLModels

Specifications (*9MPD)

*9MPD050F12C *9MPD075F12C *9MPD080J16C *9MPD100J14C *9MPD100J20C *9MPD125L20C

General

GasType
Input(Btuh)
Output(Btuh)

TransformerSize (VA)
T'statHeatAnticipator
Temp.Rise(°F/°C)

Electrical(Volts/Hz) 115/60 115/60 115/60 115/60 115/60
RatingPlateAmps

Gas& Ignition

GasType
GasValve (Honeywell)

RegulationType
IgnitionType/Series

ManifoldPress.(inwc/Pa)
Std. MainOrifices(No/Size)

FurnaceControls
FurnaceControl(Type)

FurnaceControl On
(Timed-secs) Off

Combustion
FlueOutletSize(Inches)

Std.OutletTemp° (lessthan)5' (1.5m)NoBbows(°F!°C)
BlowerPressure5' (1.5m)NoElbows(inwc/Pa)

BlowerPressure40' (12.2m)+5-90° DWVElbows(in

wc/Pa)

TransitionBxPressure 5' (1.5m)NoElbows(inwc/Pa)
TransitionBxPressure40' (12.2m)+5-90° DWVElbows
(inwdPa)

Limits& Controls
RolloutSwitch(°FPC)

LimitControlSetting(°F/°C)
StandardPressureSw.(PadNo)

BlowerSwitchPressure(Close)(inwc/Pa)
BlowerSwitchPressure(Open)(in wc/Pa)
TransitionSwitchPressure(Close)(in wc/Pa)

TransitionSwitchPressure(Open)(inwc/Pa)

HighAltitudePressureSw.(PadNo)

BlowerSwitchPressure(Close)(inwc/Pa)
BlowerSwitchPressure(Open)(in wc/Pa)

TransitionSwitchPressure(Close)(in wc/Pa)
TransitionSwitchPressure(Open)(inwc/Pa)

LongVentKit (PadNo)
PressureSwitch (PadNo)

BlowerSwitchPressure(Close)(inwc/Pa)
BlowerSwitchPressure(Open)(in wc/Pa)

TransitionSwitchPressure(Close)(in wc/Pa)
TransitionSwitchPressure(Open)(inwc/Pa)

HighAltitudeLongVentKit (Pad No)
PressureSwitch (PadNo)

BlowerSwitchPressure(Close)(inwc/Pa)
BlowerSwitchPressure(Open)(in wc/Pa)
TransitionSwitchPressure(Close)(in wc/Pa)

TransitionSwitchPressure(Open)(inwc/Pa)

Blower Data
BlowerSizeD x W in(mm)

MotorAmps/RPM
MotorType/H.R
Cap.Mfd/Volts
FilterType&Size in(mm)(qty.)

Permanent- notsupplied

CoolCap. (Tons)@.5in wc (125Pa) L,ML, MHi&Hi
GasConversion Kitsfor50k,75k,100k & 125k

Natto Propane NAHA001LP(1172958")
Propaneto Nat NAHA001NG(1172960")

*Order from Service Parts

Nat./Propane

50,000
46,000

40

.50

35-65/19-36

12.9

Nat. Propane

3.5/872 10.0/2490 3.5/872 10.0/2490 3.5/872
2/42 2/54 3/42 3/54 4/44

2

140/60

-2.6/-647

-2.3/-573

300/149
260/127

1013802

-2.2/-548

-2.0/-498
1013803

-2.0/-498

-1.8/-448

11x8 (279 x 203)

10/850

PSC/1/2

7.5/370

16x25x 1

(406x635x25)

11/2,2,21/2,3

Nat./Propane

75,000
69,000

40
.50

40-70/22-38

10.1

Nat. Propane

2

140t60

-2.6/-647

-2.3/-573

300/149
240/116

1013802

-2.2/-548

-2.0/-498
1013803

-2.0/-498

-1.8/-448

11x10(279x254)

8.0/1050

PSC/1/2

7.5/370

16x25x1

(406x635x25)

11/2,2,21/2,3

Nat./Propane

35-65/19-36

Nat.

11x10(279x 254)

(406x635x25)

21/2,3,31/2,4

GasConversionKitsfor 80k
Natto Propane

Propaneto Nat

*Order from Service Parts

80,000
73,600

40
.50

12.9

Propane Nat.

VR8205S

HotSurface

10.0/2490 3.5/872
4/55 4/42

Integrated

60,100,140,180

2

140t60

-2.6/-647

-2.5/-623

300/149
220/104

1013812

-1.5/-374

-1.3/-324
1013813

-1.2/-299

-1.0/-249

10/1050
PSC/1/2

10/370

16x25x1

Nat./Propane

40-70_2-38

SNAP

30

11x10(279x254)

(406x635x25)

11/2,2,3,31/2

100,000

92,000

40

.50

10.1

Propane

10.0/2490

3

140/60

-1.8/-448

-1.7/-243

-2.6/-647

-2.5/-623

300/149
220tl O4

1013802

-2.2/-548

-2.0/-498
1013803

-2.0/-498

-1.8/-448

10/1050

PSC/1/2

10/370

16x25x1

Nat./Propane

100,000

92,000

.50

40-70_2-38

115/60

14.4

Nat.

3.5/872

4/_

4/42

NAHA002LV

1013515

-1.0!-249

-0.8/-199

-1.71-423

-1.5/-374

NAHA003LV

1013165

-0.7/-423

-0.6/-149

-1.4/-349

-1.2/-299

11xl0 (279x254)

140/60

-1.8/-448

-1.7/-243

-2.6/-647

-2.5/-623

300/149
220tl04

1013802

-2.2/-548

-2.0/-498
1013803

-2.0/-498

-1.8/-448

13/900

PSCf_/4

40/370

16x25x1

(406x635x25)(2)

31/2,4,41/2,5

NAHA003LP(1174906")
NAHA004NG(1174907")

40

Propane

I0.0/24_

4/54

3

Nat./Propane

125,000

115,000

4O
.50

40-70/22-38

15.0

Nat. Propane

3.5/872 10.0/2490
5/42 5/54

3

140/60

-1.8/-448

-1.7/-243

-2.6/-647

-2.5/-623

300!149

190/88

1013166

-1.3/-234

-1.1/-274

-1.8/-448

-1.6/-398
1013157

-0.9/-224

-0.7/-174

-1.7/-423

-1.5/-374

11x10(279x254)

13/900

PSCf_/4

40/370

16x25x1

(406x635x25)(2)

31/2,4,41/2,5

54 Specifications are subject to change without notice. 44001 102404

CIRCULATION AIR BLOWER DATA (CFM#)

N9MPIO4OB08 (1)(5)

N9MPDO4OF08 (1)(5)

Rnd_ree_ Low Med L Med H Hi

Tap

CFM Us CFM Us CFM Us CFM Us

0.10 25 655 309 825 389 1009 476

_ 0.20 50 612 289 786 371 981 463

oil

=-_ 0.30 75 5eo 2e4 744 351 944 445

_ _ 0.40 100 508 240 700 330 897 423

_- 0.50 125 841 397

E 0.60 149 785 370

w

0.70 174 719 339

0.80 199

0.90 224

1.00 249

N9MP1050B12, N9MP2050B12 (1)(5)

Speed Low Med L Med H Hi

._ Tap

" in wc Pa CFM L!s CFM L!s CFM L!s CFM L!s

0.10 25 826 390 1083 511 1301 614 1408 664

_- _ 0.20 50 804 379 1050 496 1242 586 1347 636

OIL

_ 0.30 75 770 363 1028 485 1195 564 1295 611

U_ ,- 0.40 100 735 347 985 465 1153 544 1237 584
'_ _ 0.50 125 698 329 952 449 1093 516 1183 558

F 0.60 149 657 310 909 429 1040 491 1118 528
x 0.70 174 863 407 935 441 1053 497

LU

0.80 199 812 383 865 408 976 461

0.90 224 802 378 887 419

1.00 249 720 340 787 371

Speed Low Med L Med H Hi

Tap

in wc Pa CFM Us CFM Us CFM Us CFM Us

I,.

8. _" 0.20 50 667 315
OIL

_ 0.30 75 605 286

5

uJ 0.70 174

0.10 25 728 344

,- 0.40 100 541 255

==" 0.50 125

0.60 149

0.80 199

0.90 224

1.00 249

876 413 1079 509
832 393 1032 487

781 369 985 465
725 342 933 440

658 311 878 414
593 280 802 378

527 249 719 339

634 299
545 257

N9MPDO5OF12, *9MPDO5OF12 (1)(5) * Denotes Brand

•_ Tap

(/)

_- _, 0.10 25 826 390 1083 511 1301 614 1408 664

o IL 0.20 50 804 379 1050 496 1242 586 1347 636

Rnd_,_ee_ Low Med L Med H Hi

in wc Pa CFM L!s CFM L!s CFM L!s CFM L!s

_ 0.30 75 770 363 1028 485 1195 564 1295 611

0.40 100 735 347 985 465 1153 544 1237 584

0.50 125 698 329 952 449 1093 516 1183 558

0.60 149 657 310 909 429 1040 491 1118 528

0.70 174 863 407 935 441 1053 497

0.80 199 812 383 865 408 976 461

0.90 224 802 378 887 419

1.00 249 iiiiiiiiiiiii_i_iiiiiiiiiiiiiiiii!iiiiiiiiiiiii_i_iiiiiiiiiii_ili:_i!;720 340 787 371

N9MP106OF12 (1)(5)

Speed Low Med L Med H Hi

Tap

in wc Pa CFM _s CFM Us CFM Us CFM Us

0.10 25 895 422 1158 546 1439 679

o IL 0.20 50 876 413 1137 537 1395 658

_ 0.30 75 850 401 1102 520 1345 635

c 0.40 100 820 387 1066 503 1288 608

0.50 125 786 371 1022 482 1228 580

0.60 149 743 351 967 456 1159 547

w 0.70 174 895 422 1080 510

0.80 199 813 384 993 469

0.90 224 730 345 894 422

1.00 249 iiiiiiii_ii_3_!3!_:!iiiiiiiiiiiiii_iii!62!i_!!!iiiiiiiiiiiiii_ii5_!_!_i_!!!iiiiiiiiiiiii_i;2_!6_!_!_!_!_!_!iiiiiiiiiiiii_i_6_6!!!!!!!!!!!!!_!_iiiiiiiii_ii_3_!Si_i_i_i_i_i_785

NOTE: (1) Data Based on Bottom Only or One Side return.

(2) Data Based on Both Sides or Bottom plus One Side.
(3) 100J20 Reduce airflow by 5% if Bottom Only return.

(4) 125J20 Reduce airflow by 5% if Bottom Only return.
(5) Gray area is above maximum temperature rise range.

# CFM - Cubic Feet Per Minute airflow. Filter required for each
return-air inlet.

Airflow performance includes 1" (25.4mm) washable [600 FPM (3.0
M/s) max] filter media.

N9MPDO60F12 (1)(5)

._ Tap

Speed Low Med L Med H Hi

in wc Pa CFM L!s CFM L!s CFM L!s CFM L/s

0.10 25 765 361 966 456 1247 588 1509 712

_ 0.20 50

oil

03075

,- 0.40 100

_ 0.50 125

5

0.60 149

u.I 0.70 174

0.80 199

0.90 224

1.00 249 6_ _8

MAX CFM for Factory Washable Filters

Filter Size (in/mm) CFM L/s

14" X 25" / 356 x 635 1400 661
16" X 25" / 406 x 635 1600 755
20" X 25" / 508 x 635 2000 944
24"X25"/610x635 2500 1180

Max CFM based on 600 FPM (3.0 M/s)

NOTE: Disposable filters are typically rated at 300 FPM (1.5 M/s). These filters

only allow half the airflow when compared to 600 FPM (3.0 M/s) filters.

919 434 1205 569 1453 686
877 414 1155 545 1386 654

828 391 1102 520 1313 620
780 368 1037 489 1230 580

728 344 986 465 1148 542

909 429 1050 496
835 394 953 450

749 353 860 406

748 353

44001 102404 Specifications are subject to change without notice. 55

CIRCULATION AIR BLOWER DATA (CFM#)

N9MP1075B12, N9MP2075B12 (1)(5) N9MPDO75F12, *9MPDO75F12 (1)(5) * Denotes Brand

Speed Low Med L Med H Hi Speed Low Med L Med H Hi

Tap Tap

in wc Pa CFM Us CFM Us CFM Us CFM Us _ in wc Pa CFM Us CFM Us CFM Us CFM Us

0.10 25 1163 549 1368 646 _ 0.10 25 1163 549 1368 646

0.20 50 1120 529 1319 622 • 0.20 50 1120 529 1319 622

_ 0.30 75 1076 508 1263 596 _ _ 0.30 75 1076 508 1263 596

o_ o_

_-_ 0.40 100 1031 487 1202 567 _-_ 0.40 100 1031 487 1202 567

= 0.50 125 987 466 1148 542 _ = 0.50 125 987 466 1148 542

_" 0.60 149 1077 508 _ _ 0.60 149 1077 508

5 5

w 0.80 199 w 0.80 199

N9MP1080F16, N9MP2080F16 (1)(5) N9MPDO80J16, *9MPDO80J16 (1)(5) * Denote Brand

_-_ 0.40 100 1382 652 1648 778 _-_ 0.40 100 1382 652 1648 778

5 5

• 0.70 174 1154 545 1401 661 • 0.70 174 1154 545 1401 661

w 0.80 199 1284 606 w 0.80 199 1284 606

0.70 174 989 467 • 0.70 174 989 467

0.90 224 0.90 224

1.00 249 1.00 249 __:_:_:_6_1_;_;_;_;_;__:_:_:_:_:_:_:_:_

Speed Low Med L Med H Hi Speed Low Med L Med H Hi

Tap Tap

in wc Pa CFM Us CFM Us CFM Us CFM Us _ in wc Pa CFM Us CFM Us CFM Us CFM Us

0.10 25 1109 523 1527 721 1850 873 _ 0.10 25 1527 721 1850 873

0.20 50 1087 513 1482 699 1791 845 • 0.20 50 1482 699 1791 845

_ 0.30 75 1056 498 1426 673 1720 812 _ _ 0.30 75 1426 673 1720 812

= 0.50 125 1317 622 1575 743 _ = 0.50 125 1317 622 1575 743

_" 0.60 149 1245 588 1485 701 _ _ 0.60 149 1245 588 1485 701

0.90 224 1161 548 0.90 224 1161 548

1.00 249 iiiiiiiii_ii_i_i_i_i_iiiiiiiiiiiiii_!i_i_iiiiiiiiii!_i!;!iiiiiiiiiiii_!_ii_iiiiiiiiiii!i!iiiiiiiiiiii_!i_i_iiiiiiiiii!_i!;!iliiiiiiiiii_;;_:_i:_i:_i:_i:_iiiiiiii_#B'iil;i_iiiiiiiiii_iiO_iS!i!i_ii_iiiiiiiiiiii_8_iiiiii:i!ii!ii!!1.00 249 iiiiiiiiiiiiii_i_i_iiiiiiiiii!iii!i!i!i!i!i!_!!_i!_i!i!i!i!i!i!!!iiiiiiiiiiii_i_i_iiiiiiiiiiiiii!i!i!i!i!i!_!!_i!_i!i!i!i!iiiiiiiiiiiT#_:ii:ii:ii:ii:il!i!i!i!i!_8'!i!i!iii!i1028 485

N9MP1100F14, N9MP2100F14 (1)(5) N9MPD100J14, *9MPD100J14 (1)(5) * Denotes Brand

Rnd__ee_ Low Med L Med H Hi Rnd__ee_ Low Med L Med H Hi

Tap Tap

in wc Pa CFM Us CFM Us CFM Us CFM Us _ in wc Pa CFM Us CFM Us CFM Us CFM Us

0.10 25 1550 731 _ 0.10 25 1550 731

_'°-_ 0.30 75 1434 677 _" _ 0.30 75 1434 677

o n on

E 5

X ×

W 0.80 199 W 0.80 199

NOTE:

# CFM - Cubic Feet Per Minute airflow. Filter required for each
return-air inlet.

Airflow performance includes 1" (25.4mm) washable [600 FPM (3.0
M/s) max] filter media.

0.20 50 1492 704 • 0.20 50 1492 704

_ 0.40 100 1378 650 __._" 0.40 100 1378 650

= 0.50 125 1317 622 _ _ 0.50 125 1317 622

_" 0.60 149 1247 588 _ _ 0.60 149 1247 588

0.70 174 _ 0.70 174

0.90 224 0.90 224

(1) Data Based on Bottom Only or One Side return.
(2) Data Based on Both Sides or Bottom plus One Side.
(3) 100J20 Reduce airflow by 5% if Bottom Only return.
(4) 125J20 Reduce airflow by 5% if Bottom Only return.
(5) Gray area is above maximum temperature rise range.

MAX CFM for Factory Washable Filters

Filter Size (in/mm) CFM L/s

14" X 25" / 356 x 635 1400 661
16" X 25" / 406 x 635 1600 755
20" X 25" / 508 x 635 2000 944
24"X25"/610x635 2500 1180

Max CFM based on 600 FPM (3.0 M/s)

NOTE: Disposable filters are typically rated at 300 FPM (1.5 M/s). These filters

only allow half the airflow when compared to 600 FPM (3.0 M/s) filters.

56 Specifications are subject to change without notice. 44001 102404

CIRCULATION AIR BLOWER DATA (CFM#)

N9M P1100J20, N9M P2100J20, N9M PDIOOJ20, N9M Pll 25J20, N9MP2125J20 (2)(4)(5)N9M PD125L20,
*9MPDIOOJ20 * Denotes Brand (1)(5) *9MPD125L20 (2)(5) * Denotes Brand

Speed Speed

Tap Low Med L Med H Hi Tap Low Med L Med H Hi

= in wc Pa CFM Us CFM Us CFM Us CFM Us = in wc Pa CFM Us CFM Us CFM Us CFM Us

0.10 25 1682 794 1870 882 2081 982 2263 1068 _ 0.10 25 1720 812 1910 901 2127 1004 2315 1092

_. _ 0.20 50 1654 781 1826 862 2031 958 2193 1035 _. _ 0.20 50 1686 796 1881 888 2087 985 2268 1070

oil

_- 0.30 75 1597 754 1775 838 1963 926 2165 1022 oil

0.40 100 1547 730 1719 811 1899 896 2056 970 _ _ 0.30 75 1644 776 1833 865 2024 955 2201 1039

_ _ c 0.40 100 1600 755 1777 839 1961 925 2131 1006

_- 0.50 125 1498 707 1653 780 1825 861 1978 933 _ _ 0.50 125 iiiiiiiii_ii!51_!3i_i_i_!i!1720 812 1891 892 2029 958

E 0.60 149 1428 674 1583 747 1737 820 1854 875 E 0.60 149 1647 777 1804 851 1948 919

"_ 0.70 174 1355 639 1503 709 1650 779 1757 829 "_ 0.70 174 1571 741 1708 806 1820 859

iii iii ..........................

0.80 199 1267 598 1392 657 1548 731 1644 776 0.80 199 1604 757 1730 816

0.90 224 1266 597 1428 674 1515 715 0.90 224

1.00 249 1351 638 1.00 249 _%__:_;_8_;_6_:_:_:_:_:_:_:_;6_%_

NOTE:

(1) Data Based on Bottom Only or One Side return.
(2) Data Based on Both Sides or Bottom plus One Side.
(3) 10OJ20 Reduce airflow by 5% if Bottom Only return.
(4) 125J20 Reduce airflow by 5% if Bottom Only return.
(5) Gray area is above maximum temperature rise range.

# CFM - Cubic Feet Per Minute airflow. Filter required for each
return-air inlet.

Airflow performance includes 1" (25.4mm) washable [600 FPM (3.0
M/s) max] filter media.

See Tables below for bellyband location on motor

Bellyband Location on *9MPD Motor

Model A

*9MPD mm

O5OF12C2 53.1
O75F12C2 35.1

O8OJ16C2 46

100J 14C2 35.1
1OOJ2OC2 4t .9

125L2OC2 4t .9

Bellyband Location on Motor

A

inches

21/8
13/8

17/8

13/8
15/8

15/8

MAX CFM for Factory Washable Filters

Filter Size (in/mm) CFM L/s

14" X 25" / 356 x 635 1400 661
16" X 25" / 406 x 635 1600 755
20" X 25" / 508 x 635 2000 944

24"X25"/610x635 2500 1180

Max CFM based on 600 FPM (3.0 M/s)

NOTE: Disposable filters are typically rated at 300 FPM (1.5 M/s). These filters

only allow half the airflow when compared to 600 FPM (3.0 M/s) filters.

Bellyband Location on N9MP1 & N9MP2 Motor

Model A

N9MP1/2 inches mm

040B08C2 15/8 4t .9
050 B12C2 21/8 53.1

060B12C2 13/8 35.1
075B12C2 13/8 35.1

080F16C2 17/8 46
100 F14C2 13/8 35.1

100J20C2 15/8 4t .9
125J20C2 15/8 4t .9

Bellyband Location on N9MPD Motor

Model A

N9M PD inches mm

040 F08A2 15/8 4t .9
050F12A2 21/8 53.1

060F12A2 13/8 35.1
075F12A2 13/8 35.1

080J 16A2 17/8 46
100J 14A2 13/8 35.1

100J20A2 15/8 4t .9
125L20A2 15/8 4t .9

44001 102404 Specifications are subject to change without notice. 57

_1_ I

CONNECTION DIAGRAM

ROLLOUT SWITCH 1 TO 2

INSERIESDEPENDINGONMODEL

1 NOTE #13

MAIN LIMIT

BL--

ZOM

gLUE

_g

GRN/Y "

_D

5-AMP

R--

m

pl

w

AUXLIMIT

24VAC_

RED

J1

o
mm:::c100 180

>_ 60 140

r_

NOTE: ].

1. If any of the original equipment wire is replaced use wire rated t05° C.

2. Use only copper wire between the disconnect switch and the furnace
junction box.

3. This wire must be connected to furnace sheet metal for control to

prove flame.

4. Symbols are electrical representation only.

5. Solid lines inside circuit board are printed circuit board traces and are

not depicted as shown in the legend.

6. Replace only with a 5 amp fuse.

7. Blower motor speed selections are for average conditions, see

installation instructions for details on optimum speed selection.

8. Factory connected when LP Pressure Switch and BVSS (Chimney

Adapter Accessory Kit) are not installed.

9. Blower off-delay, gas heating selections are (60, 100, 140, and 180)

seconds, cooling or heat pump 90 seconds.

10. Ignition lockout will occur after four consecutive unsuccessful trials for
ignition. Control will auto-reset after three hours.

11. Blower motor and inducer motor contain internal auto-reset thermal
overload switches.

12. Flame sensor: 0.7 NA D.C. minimum, 2.0 - 4.0 NA nominal.

13. Depending on model, P4 inducer motor leads and P5 gas valve leads may
be in a single connector or two quick connectors.

WARNING: ELECTRICAL SHOCK HAZARD

DISCONNECT BEFORE SERVICING

CAPACITOR COPPERCONDUCTORS

(SOMEMODELS) ONLY f

;PEED TAP CODE

BLACK HI BLUE BL

ORANGE MHI BROWN BR

BLUE MLO [ORANGE O
RED LO [ RED R

CONDUCTOR ON CONTROL

O UNMARKED TERMINAL

NOT GND

BLACK BK

COLOR CODE

GREEN/YELLOW GRN/Y

[WHITE W
1 YELLOW Y

LOW VOLTAG EFACTORY
LOW VOLTAGE FIELD
LINE VOLTAGE FACTORY
LINE VOLTAGE FIELD

JUNCTION

CONTROLTERMINAL

TO115VACFIELDDISCONNECT

,,_ NOTE#2 _ EQUIPMENTGROUND

INTERLOCK
SWITCH

L

[]INDUCER CAPACITOR

RELAY P (SOMEMODELS)

1 P3 1

IGNITER N

HEAT/COOL M2 []

ELA

)WER
LAY N

CONTFAN [_

XFMR N[_

ROLLOUTSWITCH1TO3

LADDER DIAGRAM

_. HUM 24VAC I 11

__ Y
,_ G -- (FIELDINSTALLED)

X, I ° >P,B

CONTROLBOARD

PI-tO

_) P1-3 SENSOR

_:_) P1=1 NOTE#12

NOTE#13

O J1

L

m

r- il 60 140

0 Jl _)
m 100 180

:'< 140SEC

333309-I01 REV.B

:32 lOO 180

60 SEC.

:2: 100 180

]OOSEC --

Jl

3m

:-4 60 140

180SEC.

J1

i©©
moo

aoo

2oo

_m_

©m ©

©

O

3

ii

i

O

O

o

..q

I--

o

INDUCED-COMBUSTION GAS FURNACE

PARTS REPLACEMENT INFORMATION GUIDE

CASING GROUP

Blower door
Front door

Door filler plate
Top panel gasket
Blower partition

INDUCER GROUP

Gasket inducer motor
Pressure switch(es)

Inducer assembly

BLOWER GROUP

Blower assembly
Blower hanger

Blower housing
Blower cutoff panel

Blower motor
Blower wheel

Capacitor
Capacitor strap

FILTER GROUP

Filter(s)

HEAT EXCHANGER GROUP

Primary heat exchanger cell

Primary heat exchanger partition
Secondary heat exchanger assembly
Transition assembly

Plate gasket

ELECTRICAL GROUP

Control box
Junction box

Limit switch(es)
Control board

Door switch
Transformer

Wiring harness
5-amp fuse

GAS CONTROL GROUP

Manifold
Burner

Orifice
Flame sensor

Hot surface ignitor
Gas valve

FIRE, EXPLOSION, ELECTRICAL

SHOCK AND CARBON MONOXIDE

POISONING HAZARD

Failure to follow this warning could result in
dangerous operation, personal injury, death
or property damage.

Improper installation, adjustment, alteration,
service, maintenance, or use can cause
carbon monoxide poisoning, explosion, fire,

electrical shock, or other conditions which
may cause personal injury or property

damage. Consult a qualified installer,
service agency, local gas supplier, or your

distributor or branch for information or
assistance. The qualified installer or agency

must use only factory-authorized and listed
kits or accessories when modifying this
product.

PRODUCT NOMENCLATURE

* 9

Brand Identifier

* = Entry Level Brand
* = Brand (C, H, T)

Model Efficiency
8 = Non-Condensing, 80+% Gas Furnace

9 = Condensing, 90+% Gas Furnace
Installation Configuration

DN = Downflow
UH = Upflow/Horizontal

MP = Multiposition, Up/Down/Horizontal
MV = Multiposition, Variable Speed, Up/Down/Horizontal

Major Design Feature

1 = One (Single) Pipe
2 = Two Pipe
D=lor2Pipe

L = Low NOx
X = High Efficiency

N = Single Stage

P = PVC Vent
T = Two Stage
V = Variable Speed

Have available the product!model number and theserial number located on the unit rating plate to ensure correct replacement parts.
TO OBTAIN INFORMATION ON PARTS: Consult your installing dealer or the classified section of your local telephone

directory under the "Heating Equipment" or "Air Conditioning Contractors and Systems" headings for dealer listing by
brand name, or contact:

MP D o 40 12 A

Engineering Rev,

Denotes minor changes

Marketing Digit

Denotes major change

Cooling Airflow

08 = 800 CFM

12 = 1200 CFM
14 = 1400 CFM
16 = 1600 CFM

20 = 2000 CFM

Cabinet Width
B = 15.5"Wide

F = 19.1"Wide
J = 22.8" Wide

L = 24.5" Wide

Input (Nominal MBTUH)

International Comfort Products, LLC

Consumer Relations Department

P.O. Box 128

Lewisburg, TN 37091, USA

931-270-4100

440 01 1024 04 59