ICP C9MPX100L20A2, H9MPX060F12A2, T9MPX080J16A2 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

Start-up Check Sheet ......................... 3

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 ......................... 32

Electrical Wiring ............................... 37

Ductwork and Filter ............................ 38

Checks and Adjustments ....................... 41

Furnace Maintenance .......................... 43

Sequence of Operation & Diagnostics ............ 44

Wiring Diagram (*9MPX) ....................... 46

Technical Support ............................. 47

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.

Printed in U.S.A. Specifications are subject to change without notice. 440 01 1051 03 Dec. 2010

PERSONAL INJURY, AND/OR PROPERTY
DAMAGE HAZARD

Failure to carefully read and follow this warning could
result in equipment malfunction, property damage,

3ersonal injury and/or death.

Installation or repairs made by unqualified persons could
result in equipment malfunction, property damage,

3ersonal injury and/or death.

The information contained in this manual is intended for

use by a qualified service technician familiar with safety

3rocedures 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.

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

44001 1051 03

Specifications are subject to change without notice.

Printed in U.S.A.

START-UP CHECK SHEET

For 95% 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: (o)__

Temperature of Return Air: (o)__

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: (o)__

Adjustments

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?

Type of Gas: Natural: Lj

Filter Type and Size:

440 01 1051 03 Specifications are subject to change without notice. 3

Propane: Lj

Temperature of Return Air: (o)__

Temperature Difference: (o)__

Static Pressure (Ducts) cooling: Supply Air Return

Blower Speed Tap used for cooling:

Dealer Comments:

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 modifying this product. Refer to the individual
instructions packaged with the kits or accessories when

installing.
Follow all safety codes. Wear safety glasses, protective

clothing, and work gloves. 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.

ELECTRICAL SHOCK 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
servicin 9 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 to 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.

4 Specifications are subject to change without notice. 440 01 1051 03

• 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 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.

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

or dwelling. Fire or smoke can cause 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.

FrozenWaterPipeHazard

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 result
in 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 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 through Figure 20)

1. Disconnect the5/8"(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" (19.1mm) 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.

440 01 1051 03 Specifications are subject to change without notice. 5

Installation

CARBON MONOXIDE POISONING HAZARD
Failure to properly vent this furnace or other

appliances 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

Combustion Air Check in the Combustion &

Ventilation Air section. This furnace MUST be

vented to the outside.

InstallationPositions

This furnace can beinstalledin an upflow,horizontal (eitherleftor

right) or downflowairflow position. DONOT installthis furnace on
its back. For the upflow position, the return air ductwork can be
attachedto eitherthe left or rightside paneland/orthe bottom.For
horizontal and downflowpositions,the returnair ductworkmust be

attached to the bottom. The return air ductwork must never be
attachedto the back ofthefurnace.

Locationand Clearances

1. Refer to Figure 1 or Figure 2 for typical installation and
basic connecting parts required. Refer to Figure 3 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 4).

Typical Upflow Installation

• .... _H:_ (SeeVentTerminationShieldingfor dimensions)

8 (203 2...) iv,.

.... ,, ; _, ,, _ :__ Couplingon endsof

zU (b / m) tvlax '

in same ' _1 I_ _' exhaust pipe. Total

atmospheric _ (notusedon /' side structure = 8"
zone _Ii SinglePipe / (203.2mm)

Vent PipesMUST

supported
Horizontallyand

Vertically

* Increaseminimumfrom8" (203.2mm)to18" (457.2mm)forcoldclimates(sus-
tainedtemperatures0°F (-17°C)and belowfor24 or moreconsecutivehours),

Aluminumornon-rusting shieldrecommended.

_ InletPipe pipe& couplingout-

"_ : - model)

Max.

zone

25-2,!-,!3

Typical Downflow Installation

See VentTermination
Shieldingin VentSection.

_1 I_ '\_

InletPipe _ _ *8" (203.2mm) Min.

\

(notusedon_ _ 20' (6.1m) Max.in

Single Pipe _J_ sameatmosphericzone

model)

\

\

Coupling on inside
andoutsideofwallto

restrainyen!pipe

\ 8" Min.

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

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

VentPipesMUST

besupportedHorizon-

tally andVertically _.

(203.2mm) air

(6.1m)Max.

same
osphericzone

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.

* Increaseminimumfrom8" (203.2mm)to18" (457.2mm)for coldclimates(sus-
tainedtemperatures0°F (-17°C)andbelowfor 24 or moreconsecutivehours),

25-23-33a

FROZEN AND BURST WATER PIPE HAZARD
Failure to protect against the risk of freezing 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"_

6 Specifications are subject to change without notice. 440 01 1051 03

InstallationRequirements

1. Install furnace level.

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

3. Install furnace as centralized as practical with respect to the
heat distribution system.

4. Install the vent pipes as short as practical, and in
accordance to these instructions. (See Vent and

Combustion Air Piping section).

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 4.

6. Use a raised base for upflow furnace if the floor is damp or
wet at times.

7. For downflow installations, non combustible subbase must
be used under the furnace unless installation is on a non

combustible floor surface. This requirement applies even
when a coil box or cabinet is used.

8. For horizontal installations, line contact is permissible only
between lines formed by intersection of back and two sides
of furnace jacket, and building joists, studs or framing.

9. Residential garage installations require:

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

• Located or physically protected from possible damage by
a vehicle.

10. 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 orthoroughly
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.

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.

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:

CondensateTrap and Drain Lines

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
for upflow and downflow installations or top to bottom for horizontal

installations.

Vent and CombustionAir Connections

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 $636. The special vent fittings
and accessory concentric vent termination kits and accessory
external drain trap have been certified to ULC $636 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 $636, 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.

440 01 1051 03 Specifications are subject to change without notice. 7

Consignes sp6ciales pour rinstallation de ventillation au
Canada

Uinstallation faite au Canada dolt se conformer aux exigences du

code CSA B149. Ce syst_me de ventillation dolt 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, cots classe

IIA, 65 deg C. doivent _tre utitises 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 ladate 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. L'acceptation du standard Canadien CSA B419 est

directement relie & I'installation 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 Dual Certified 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 Direct Vent 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

Typical Horizontal Installation

Inlet Pipe (notusedonSinglePipemodel)

Vent

Pipe

_'] Condensate

__ Trap

\h --4:

25-23-34

NOTE:5" (127mm) bottom clearance required for condensatetrap.

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 3). 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 suspended from the floor joists in a crawl
space or the rafters in an attic, it is necessary to use steel pipe
straps or an angle iron frame to rigidly attach the furnace to prevent
movement. These straps should be attached to the furnace bottom
side 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.

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) inches 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].

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 3.
This furnace MUST NOT be installed directly on carpeting or tile 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.

8 Specifications are subject to change without notice. 440 01 1051 03

iiiiii;_iiiiiiiii!iiiiiiiiii_i_Xi:iiiiii!i!_iiiii_ii;¸;iiiiiii/!ii_;_;iiiiii!iiiiiiiiiiii;;i;;i;;iiiiii;iiiii/iiiiiiiiiiiii111i/ilil

_!_i_:! I Dimensions & Clearances

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

---1 F --
_AIRINTAKE

J

J

FVENT

/

TOP

/

G
T

r n

LEFTSIDE 611/1__

TRAP (KO) (COUNTERFLOW)- (177.5t

r

ELECTRICAL

11/4

(318)

11/16(27) t

AIRINTAKE(KO) F _

TRAP (KO) (122.2) .... ,_)

UPFLOW/HORIZONTAL....._ _

21/4 (57.2)

• THERMOSTAT"j _.... 7....

• (177.8)

i'

131/4

(336.6)

1 IKOl

17/6

(47.6

I

I

I BOTTOM

D I

I
I
I
L

_ 231/8

VENT......... \_ ./

..... 4i3116"_'\__ )(ALTERNATE)

./ /

215/8 _ 47/8

(549.3) (123.8)

24

(609.6)

(587.4)

_(34.9) (804.9)_

o_ 13/8 297/8

175/16 1913/16

(439.7) (503.2)

111/16

(42.9)

/

I i ;

]

i

I

I
I

I
I

1311/16

/

(347.7)

3111/1J

283/a

(730.3

Drawing is representative, _-1T//4---_

but some models may vary // ,(31.7!: _, ............ ii191/ " (7239

ALLO,MENS,ONS,°=

' IN = 25.4MM - ( ) 1_:/68((6_ '3 )_= _ ,/'

Unit Cabinet Bottom Top

Capacity A B C D E F G H

*9MPX060F12 191/8 175/6 21/6 143/4 43/8 41/2 21/2 91/2

*9MPX080J12 223/4 211/4 115/16 183/4 43/8 41/2 25/8 113/8

*9MPX080J16 223/4 211/4 115/16 183/4 43/8 41/2 25/8 113/8

*RMPXl00L20 241/2 23 7/16 23 43/6 41/2 21/4 121/4

(485,8) (447,7) (54) (374,7) (111,1) (1143) (63,5) (2413)

(577.9) (539.8) (49.2) (476.3) (111.1) (114.3) (66.7) (266.9)

(577,9) (539,8) (49,2) (4763) (111,1) (1143) (6&7) (28&9)

(6223} (584,2) (11,1} (5842) (111,1} (1143} (57,2) (311,2)

MINIMUM CLEARANCES TO COMBUSTIBLE

MATERIALS FOR ALL UNITS - in (mm)

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

furnace and in structure)

Required For Service

A

ALL SIDES Of SUPPLY PLENUM

SIDES
VENT
TOP OF FURNACE

FRONT

*30" (762mm)clearancerecommendedforfurnaceremoval.

Horizontalposition:Linecontactis permissibleonly between
linesformedbyintersectionsoftop and twosidesoffurnace

acket,and buildingjoists, studsor framing.

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.

/ _ _-_. --- 281/2

46/16 ,

GAS(KO)\

13/16

(30.2) (122,2)

297/.8

(758.6)

273/6

(690.61215/_
913/16 (549.3
(249.2)

3311h. (439.7)

(855._1' 1111/_e

Y v v _

KO= KnockOut (123.8)

\

.... ' TRAP(KO)

,_/ (COUNTERFLOW)

b_ _ / /

__, _ ELECTRICAL(KO)

/ \ _AIRINTAKE(KO)

413/16

"\J iS_-_ (ALTERNATE)
/ _. _.----VENT(KO)

<_ TRAPIKOI

_/6 _-

..... 7 _,I \_ 21/4 _

(177.8) THEXRMOSTAT(57.2)_

175/16

/14291

_- 47/8

/ RIGHTSIDE

UPFLOW/HORIZONTAL

131/4

336.6

215/8

(549.3) 17/8

24 (47.6)

(609.6)

*24" (609.6)

1" (25.4)

0
0

1" (25.4)

3/4 (19.1
TYPE

L

4O

(lO16)

* Denotes Brand

25-23-36b

440 01 1051 03 Specifications are subject to change without notice. 9

Knockouts

.........................................................................................................................................................for Knockout

Hammer and Screwdriver used

CUTHAZARD

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 5) 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.

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 inthe

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.

I

i0 \
i / 'i

i f_ / ;;

/ /

\i

'\'9'!

i

25-40-06

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

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.

OutdoorCombustionAirMethod

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).

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).

/'

/

10 Specifications are subject to change without notice. 440 01 1051 03

GasVent

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

This installation NOT approved in Canada GasVent

Above Insulati,alternateInletAir (1) _ _1 _ 1_- _- _- _- _- _- _- _- _- _- _-=_

_ GasVent _ Outlet _ _ II II JILL[-- ou

OutletAir (1) SoffitVent I1_11 _ I II 3| II II (2)

_ n _Vventilated Attic_ Air (,) I II Airtlet

._../ GableVent _ ;::1i lr _-

/,IFI1 p bovelnsulation IrU-1 II II

I II I10utletAir(1) SoffitVentI."leL,_Fu'_cd Iw_;I ___-[_LL Inlet

I LL_ -,rt,, ]_._ I p,°rl L,_IFI._ Air (2)

I I I _ MinimumOneInlet and OneOutletAir Supply is Required
I I I I I Inlet May be in anyCombinationShown

Inlet _ ...... IU _ InletAir OpeningMustbeWithin12"(304.8mm)°f fl°°r

alternatelnletAir (1) Air(l) _ I I_1 _1_ OutletAir OpeningMustbe Withinl2,, (304.8mm)of ceiling

ConfinedSpaceInstallation

NOTE: A confined space is defined as an area with less than 50

cubic feet per 1,000 BTUH (4.8 cubic meters per kW) input rating

for all gas appliances installed in the area.

Requirements

1.

Provide the space with sufficient air for proper combustion and

ventilation of flue gases using horizontal or vertical ducts or

openings.

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.
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:

Air (2)

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

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
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

STUB(kW)

MinimumFreeAreaRequiredfor EachOpeningorDuctto Outdoors

Input TwoHorizontalDucts SingleOpening TwoVerticalDuctsorOpenings RoundDuct

Rating BTUH(kW) BTUH(kW) BTUH(kW) BTUH(kW)

sq.in./2,000(1cm2/,09) sq.in./3,000(1cm2/,135) sq.in./4,000(1cm2/,18) sq. in./4,000(6,5cm2/,18)

60,000(17.58) 30sq.in.(194cm2) 20sq.in.(129cm2) 15sq.in.(97cm2) 5" (127mm)
80,000(23.45) 40sq.in.(258cm2) 26.7sq.in.(172.3cm2) 20sq.in.(129cm2) 5" (127mm)

100,000(29.31) 50sq.in.(322cm2) 33.3sq.in.(214.8cm2) 25sq.in.(161cm2) 6" (152.4mm)

EXAMPLE: Determining Free Area

Furnace Water Heater Total Input
100,000 + 30,000 = (130,000 + 4,000) 32.5 Sq. In. Vertical

29.31 8.8 (38.11 + .18) 210 cm_ Vertical

Furnace Water Heater Total Input
100,000 + 30,000 = (130,000 + 2,000) 65 Sq. In. Horizontal

29.31 8.8 (38.11 + .09) 423 cm2 Horizontal

440 01 1051 03 Specifications are subject to change without notice. 11

IndoorCombustionAir(UnconfinedSpace)

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

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.

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

through ducts, to supplement air infiltration for

CARBON MONOXIDE POISONING HAZARD

proper combustion and ventilation of flue gases.

Failure to supply additional air by means of

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 alt 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 75,000 100,000BTU 125,000BTU

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

0.60 1,050(29.7)

0.50 1,260(35.3)

0.40 1,575(44.1)

0.30 2,100(58.8)

0.20 3,150(88.2)

0.10 6,300 (176.4)

0.00 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/NFPA 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 BTUH

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

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

2,100(58.8) 2,625(73.5) 1,875(52.5) 2,813(78.8) 3,750(105) 4,688(131.3)
2,800(78.4) 3,500(98) 2,500(70) 3,750(105) 5,000(140) 6,250(175)

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

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

NP NP NP NP NP NP

/ \

Required Volume other _ 59 m3 _k [ other )

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

RequiredVolume fan_ 15ft3 ( !fen )

-- ACH .293 kW

ACH 1000 BTUH

/ \

RequiredVolume fan _ .42 m3 _k ! fan )

ACH .293 kW

ventilation grilles or ducts 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:

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

! fan = fan-assisted appliance input in BTUH

ACH= 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 in different stories. The volumes of spaces
on different stories shall be considered as communicating

spaces where such spaces are connected by one or more

12 Specifications are subject to change without notice. 440 01 1051 03

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 (5.5cm2/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 walt-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.

VentingandCombustionAirCheck

NOTE: If this installation replaces an existing furnace from a

commonly vented system, the original venting system may no
longer be sized to properly vent the attached appliances. An

improperly sized venting system may cause the formation of
condensate in the vent and the leakage or spillage of vent gases.

To make sure there is adequate combustion air for all appliances,

MAKE THE FOLLOWING CHECK.

1111111111111111111111111111111111!]iili111iiiiililiiiliiliii!]Iiiliiliiii!iiiililliiiii

I I ontO.o°=

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

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 burner

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.

Vent Pipe "--'_1 I / Draft Hood

wTyPtieCra/eGatSr [ I I/ V,<.__" Match

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

The following information is supplied to allow the installer to make

adjustments to the setup of existing appliances, IF REQUIRED,
based on good trade practices, local codes, and good judgement
of the installer. Manufacturer does NOT take responsibility for

modifications made to existing equipment.

440 01 1051 03 Specifications are subject to change without notice. 13

ForTwo PipeInstallation(DirectVent)

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.

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.

DualCertified(*9MPXModels)

This furnace is certified as a category iV 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.

ContaminatedCombustionAir

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 CombustionAirPiping Guidelines

This furnace is approved for venting with Schedule 40 PVC,

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

Applicable ASTM 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 it joins 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

11. All vertical pipe runs MUST be supported every six feet

.......... 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 Instructions For Horizontal

Vents).

is allowed to rest on the combustion blower.

be reduced.

MUST slope upwards. A minimum of 1/4" per foot (6.4mm
per 304.8 mm) 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 misatigned to

provide the correct slope.

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

(1.8m) where accessible.

Pipe

D2468

D2661

D2466
D2665

14 Specifications are subject to change without notice. 440 01 1051 03

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 if the vent diameter is increased prior to

having an elbow turned upward. This could cause nuisance

tripping of the pressure switch.

CombustionAirandVentPiping 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' (3.1m). 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" (76.2mm), 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 Armaflex or other
equivalent type of insulation.

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

SizingCombustionAirandVentPipe

Consult Table3 select the proper diameter exhaust and
combustion air piping. Exhaust and combustion air piping is sized

for each furnace BTUH size based on total lineal 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 *9MPX IS NOT
included in the count.

Pipe Diameter Table

*9MPX Model

60,000 BTUH Furnaces

10' (3m)& (2) 90° elbows with 1.5" (38.1mm) PVC pipeor

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

70' (21.3m)& (5) 90° elbows with 3" (76.2mm)PVCpipe

80,000 BTUH Furnace

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

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

100,000 BTUH Furnace

10' (3m) & (2) 90° elbows with 2" (50.8mm) PVCpipe or
40' (12.2m)& (5) 90° elbows with 3" (76.2mm)PVCpipe

The minimum vent length is 5' (1.5m) of PVC. Elbows are DWV
Long Radius Type for 2" (50.8ram) 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,

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 refer to Figure 9 for vent
termination clearances.

3. For Direct Vent Installation refer to Figure 8 for vent
termination clearances.

440 01 1051 03 Specifications are subject to change without notice. 15

Direct Vent Termination Clearance

/'

/

/

I_1 VENTTERMINAL \\\\\

(y AIR SUPPLY INLET

E_ AREAWHERE TERMINAL IS NOT PERMITED

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

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

anticipatedsnowlevel

B Clearanceto awindowordoorthat maybe opened 12" (30cm) forappliances> 10,000Btuh (3kW) and < 9" (23cm) for appliances > 10,000Btuh(3 kW)and < 50,000

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

C Clearanceto apermanentlyclosed window * *

D Verticalclearanceto a ventilatedsoffit locatedabovethe * *

terminalwithin a horizontaldistanceof 2' (61cm)from the
centedineofthe terminal

E Clearanceto an unventilatedsoffit * *
F Clearanceto an outsidecorner * *

G Clearanceto an insidecorner * *

H Clearanceto each side of the centedineextendedabove 3' (91cm) within 15' (4.5 m)abovethe meter/regulator *

electricalmeteror gasserviceregulatorassembly assembly

I Clearanceto seMce regulatorvent outlet 3' (91cm) *

J Clearanceto non-mechanicalair supplyinlet to buildingor 12" (30cm) for appliances > 10,000Btuh(3kW) and< 9" (23 cm)forappliances> 10,000Btuh(3 kW)and <

thecombustionair inlet to any otherappliance 100,000Btuh (30kW), 36" (91cm)forappliances > 50,000Btuh(15 kW),12" (30cm) for appliances> 50,000

100,000Btuh (30kW) Btuh(14.7 kW)
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 of the centedineextendedaboveor 12" (30 cm) 12" (30cm)

belowventterminal ofthefurnace to a dryer or water heater
vent,orotherappliance'sdirectvent intake orexhaust.

N Clearanceto thevent terminalof a dryervent, water heater 3' (91cm) 3'(91 cm)

O Clearancefroma plumbing ventstack 3' (91cm) 3'(91 cm)

P Clearanceabovea pavedsidewalkor paveddrivewaylocated 7' (2.13m) ** *

onpublicproperty.

> greaterthan, _>greaterthan orequalto, < lessthan, _ lessthanor equalto

(1.) Inaccordancewith the currentCSAB149.1, NaturalGasandPropaneInstallationCode
(2.) Inaccordancewith the currentANSI Z223.1/NFPA54,NationalFuelGasCode
# 18" (46cm)aboveroof surface

+ Permittedonlyif veranda,porch,deck,or balconyis fully openon a minimumoftwo sides beneaththefloor.

Forclearancesnotspecifiedin ANSI Z223.1/NFPA54 or CSAB149.1,clearancesshall bein accordancewith local installationcodesand

the requirementsofthe gas supplierandthe manufacture'sinstallationinstructions.

** A ventshall notterminatedirectlyabovea sidewalkor paveddrivewaythat is locatedbetweentwo singlefamily dwellingsand servesboth dwellings.

Notes:

1. The ventfor this applianceshallnotterminate
a. Overpublicwalkways;or

b. Nearsoffitvents orcrawlspaceventsor other areas wherecondensateorvaporcouldcreate a nuisanceor hazardor propertydamage;or
c. Wherecondensatevapor could causedamage orcouldbe detrimentaltothe operationof regulators,relief valves, or other equipment.

2. When locatingventterminations,considerationmustbe givento prevailingwinds,location,and other conditionswhichmay causeredrcolation ofthe combustionproductsof adjacentvents.
Recirculationcan cause poor combustion,inletcondensateproblems,andacceleratedcorrosionofthe heatexchangers.

3. Avoidventingundera deck orlargeoverhang.Recirculationcouldoccur and cause performanceor system problems.

16 Specifications are subject to change without notice. 440 01 1051 03

Other than Direct Vent Termination Clearance

H

I_l VENT TERMINAL /')'_

\\

\X!" AIR SUPPLY INLET _ AREAWHERE TERMINAL IS NOT PERMITED

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

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

anticipatedsnowlevel

B Clearanceto awindowordoorthat maybe opened 12" (30cm) forappliances> 10,000Btuh (3kW) and < 4'(1.2 m) belowor to the side ofthe opening.1'(30 cm)above

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

C Clearanceto apermanentlyclosed window * *

D Verticalclearanceto a ventilatedsoffit locatedabovethe * *

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

E Clearanceto an unventilatedsoffit * *
F Clearanceto an outsidecorner * *

G Clearanceto an insidecorner *

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

electricalmeteror gasserviceregulatorassembly assembly assembly

I Clearanceto sewiceregulatorvent outlet 3' (91cm) *

J Clearanceto non=mechanicalairsupplyinlettobuildingor 12" (30cm)forappliances > 10,000Btuh (3kW) and < 4' (1.2 m) belowor to the side of opening: 1' (30 cm) above

thecombustionair inlet to any otherappliance 100,000Btuh (30kW), 36" (91cm)forappliances > opening.

100,000Btuh (30kW)

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 of the centerlineextendedaboveor * *

belowventterminal ofthefurnace to a dryer or water heater
vent,orotherappliance'sdirectvent intake orexhaust.

N Clearanceto thevent terminalof a dryervent, water heater * *

O Clearancefroma plumbing ventstack * *

Clearanceabovea pavedsidewalkor paveddrivewaylocated

P 7' (2.13m)** 7' (2.13m)

on punic property.

> greaterthan, _>greaterthan orequalto, < lessthan, _ lessthanor equalto
(1.) Inaccordancewith the currentCSAB149.1, NaturalGasandPropaneInstallationCode
(2.) Inaccordancewith the currentANSI Z223.1/NFPA54,NationalFuelGasCode

# 18" (46cm)aboveroof surface
+ Permittedonlyif veranda,porch,deck,or balconyis fully openon a minimumoftwo sides beneaththefloor.

ForclearancesnotspecifiedinANSIZ223.1/NFPA54orCSAB149.1,dearancesshallbe inaccordancewith localinstallationcodesandthe requirementsofthegas supplierandthemanufacture'sinstallation
instructions.

A ventshall notterminatedirectlyabovea sidewalkor paveddrivewaythatis locatedbetweentwo singlefamily dwellingsand servesboth dwellings.

Notes:

1. The ventforthis applianceshallnotterminate
a. Overpublicwalkways;or
b. Nearsoffitvents orcrawlspaceventsor other areas wherecondensateorvaporcouldcreate a nuisanceor hazardor propertydamage;or
c. Wherecondensatevapor could causedamage orcouldbe detrimentaltothe operationof regulators,relief valves, or other equipment.

2. When locatingventterminations,considerationmustbe givento prevailingwinds,location,and other conditionswhichmay causerecircolationofthe combustionproductsofadjacentvents.
Recirculationcan cause poor combustion,inletcondensateproblems,andacoeleratedcorrosionofthe heatexchangers.

3. Avoidventingundera deck orlargeoverhang.Recirculationcouldoccur and cause performanceor system problems.

440 O1 1051 03 Specifications are subject to change without notice. 17

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 (257

ml) of water into 1/2" 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" PVC or CPVC pipe, however alternate 1/2" CPVC [nominal

5/8" (15.9mm) 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" (19.1 mm) per foot downward

slope toward the drain. 1/4" (19.1mm) per foot (304.8mm) is

recommended. Installation of an overflow line is recommended

when the 1/4" (19.1mm) per foot (304.8mm) slope to the

condensate drain cannot be maintained. A drain tube clip is

included in the furnace to prevent kinking/buckling of the drain
tube. The 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.

Fi_} _0 !,i,iI ] Drain Tube Clip Location

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 itmay 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" Installation Section of 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
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

Blower

Shelf

Representativedrawing only,some models may vary in appearance.

Door
Switch

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

18 Specifications are subject to change without notice. 440 01 1051 03

Upflow Installations Top Vent

-_ s ¸

VentDrain
& Clamps

Dual Pressure Switch Detail

DrainConnectorBlack PVC

3/4" (18,1mm)PVCX 1/2"

(12,7mm)CPVC (Loose
partsbag)

CasingGrommet //
BlackRubber /

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

Coupling&Clamps
(Optional)

DrainTee....

DrainTube
BlackRubber

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

Clamps

DrainTube

Corrugated5/8"ID....

&Clamps

...............ONLY

......On

_ ==,,,,D % i

..... _r_ --, l_--_ _

\ <_, ,,7

. j-----

', i o o

SomeModels

ReliefTube

..............Black Rubber3/16"

(4.8mm)ID

Single Pressure
Switch

Street Elbow

......... 1/2" (12.7mm) CPVC

.j-

(Loose parts bag)

DrainLineVentTee3/4" " ",,
(18.1mm)PVCor1/2"(12.7mm) DrainTubeBlackRubber/8 (15.9mm)ID &

CPVC(Fieldsupplied) Clamps,Cutlengthtofit (Loosepartsbag)

25-24-80

Representativedrawingonly_somemodelsmayvaryinappearance.

Upflow Installations Top Vent (SeeFigure11)

Remove knockout from the side of the furnace casing where drain

tube will exit.

Install casing grommet [black rubber 518" (15.9mm) ID grommet-
in loose parts bag]

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

(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.

440 01 1051 03 Specifications are subject to change without notice. 19

Upflow Installations Vent through Left Side

Plastic Cap

Yelloworblack

J

Coupling&Clamps
(Optional).

Either:ThePVC

VentDrain
& Clamps

essure Switch Detail

DrainConnectorBlackPVC

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

(12,7mm)CPVC

(Loosepartsbag),,\.....

CasingGrommet / \,

DrainTeeorafield
supplied2"

(50.8mm)PVCTee

\

TeeTrapWhite PVC
(loosepartsbag)

DrainTube
BlackRubber

1/2"(12,7mm)ID

& Clamps
DrainTube
Corrugated

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

,_\\ _\\

BlackRubber --. // \,\ .__- ',
5/8"(15,9mm)ID _ / '_ _ _-"

(Loosepartsbag) _ _ "_\_"_',,,,,

.... ,,

2" (50,8mm)PVC
Coupling

/

• q r

\

..... ---

.....OnSomeModels

i i

/;\

. ]_J.' -.

0 o j

ONLY

ReliefTube

.....Black Rubber3/16"

(4.8mm)ID

Single Pressure
Switch

SIDE VIEW

Rotatedownward
5° to 100

]uilt-in channelwill

be angled5° to 10° also.

DrainLineVentTee3/4" (18,1mm)PVCor1/2""
(12.7mm)CPVC(Fieldsupplied)

Representativedrawingonly_somemodelsmayvaryinappearance.

25-24-81

Upflow Installations Vent through Left Side (SeeFigure12)

Remove drain tee from inducer discharge and remove black drain Cut the black drain tube [5/8" (15.9mm) ID - in loose parts bag] to

tube 1/2" (12.7mm) ID from bottom of drain tee. length to fit between trap and tube connector through grommet.

Install Vent Pipe grommet in side of casing. Clamp both ends of the drain tube using clamps provided.
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, or

• A 2" (50.8mm) PVC coupling fastened onto the drain tee.
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
Install the black PVC drain connector [3/4" (19.1mm) PVC x 1/2"

CPVC from loose parts bag] as shown in the illustration above.

20 Specifications are subject to change without notice. 440 01 1051 03

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.

Downflow Left-Side Vent and Trap

j Plastic Cap

J Yellow or black

Coupling&Clamps
(Optional)\

VentDrain

&Clamps Either:The PVC

Single Pressure Switch Detail \\

DrainTeeora field
supplied2"

(50.8mm)PV_Tee

PartsBag)

WARNING
MoveCapsto

topoftrap

2" (50.8mm)PVC

Coupling

/ DrainTube

/ / BlackRubber1/2"

// (12.7mm)ID&Clamps

/

/

Dual PressureSwitch

SIDE VIEW

__[ Rotatedownward

.L 5°to10°

,//% .....

NOT_B. uilt-in channel will
be angled 5°to 10° also.

ReliefTubeBlackRub-

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

\

.....OnSomeModels

,,Ljjj ONLY

INLET _,.

Flexible TubingConnector,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
CorrugatedCutatstraightsection {_i _ _-_ /_-_/._ _

I

i.......

...............A_,_,_,,_ _,............ BarbedCoupling1/2"(12.7mm)

Leaveroomforclamp _CutHere

Representativedrawing only_some modelsmay vary in appearance.

Downflow Left-Side Vent and Trap (SeeFigure13)

Remove the inducer mounting screws, rotate the inducer 180 °
and retighten the inducer screws to 20" pounds (2.26 newton

meter) 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(2) 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. Insome 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 inthe picture. In some

OD(loosepartsbag)

\ J

Preassemble&
insertinto furnace

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

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

of extra 3/16" (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 2" (50.8mm) PVC coupling fastened onto the drain tee
Install tee trap into bottom section of tee and glue pipe.
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.

25-24-69

440 01 1051 03 Specifications are subject to change without notice. 21

Downflow Right-Side Vent and Trap

f- ".... _ J Yellowor black

VentDrain
& Clamps

j Plastic Cap

SIDE VIEW

"-I-_ Rotatedownward

_J_ 5° to10°

i, :¢_ _ /,

NOT_J n_e_

be angled5°to 10" also.

Single Pressure Switch Detail

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

(LoosePartsBag)

Dual Pressure'Switch

Dr

]ir

TubeCorrugatedBlack,

5/8

' i

15.9mm)ID & Clamps

TrapConnection

ReliefTube
BlackRubber

BarbedCoupling
1/2"(12.7mm)OD

(LoosePartsBag)

,\

/16"(4.8mm)ID

/

DrainHose /- _
BlackRubber| |

1/2" (12.7mm)I_

Preassemble &

insert intofurnace

"Clampears"
PointedOUT

Coupling&Clamps

.(Optional)

,/

Cutto Fit&

Clamps

OnSome

Models

//////

ONLYJ

/ 2"(50.8mm)PVC

Coupling

Either:ThePVC
DrainTeeorafield

supplied2"

(50.8mm)PVCTee

TeeTrapWhitePVC

.c

(loosepartsbag)

DrainConnectorBla(
PVC3/4"(19.1mm)

WARNING

PVCX 1/?. (12.7mm)

CPVC(Looseparts

bag)

Representativedrawing only_some models may vary in appearance.

Downflow Right-Side Vent and Trap (SeeFigure14)

Remove the drain tee if installed.
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 right side of the unit using the two(2) screws provided.

Connect the corrugated drain tube from the transition box to the

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 all 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 all connections

with clamps.

\\

\

_ DrainTube)BlackRubber,5/8"

(15.9mm)IDCuttofit &Clamps

(loosepartsbag)

25-24-69b

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 2" (50.8mm) PVC coupling fastened onto the drain tee
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. 440 01 1051 03

Plastic Cap
Yelloworblack

J

All Models Vent through Right Side

OnSomeModels
ONLY

\

VentDrain
& Clamps

Dual
Pressure Switch

DrainTube
Corrugated 1.

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

/'-_ _ Rotate downward _12_o_'_r_L_0i_ "-"_

/_ __ 5°to10° :; U/;

SIDEVIEW _ i_,;_;D6_i,_771:_, - /

be angled 5° to 10° also.

Representativedrawingonly,somemodelsmayvaryinappearance.

K_J _-!o; @g f

ReliefTube
BlackRubber

3/16" <4,8mm)ID

Teeorafieldsupplied
2"(50.8mm)PVCTee

/

/

i'

/iSingle Pressure Switch Detail

Either:ThePVCDrain

/

F

H

k'X

I

TeeTrapWhitePVC
(loosepartsbag)

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

(loosepartsbag)

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

...... . (18,1mm)PVCor 112"

DrainLineVentTee3/4"

/_ .... _\.. (12.7mm)CPVC(Fieldsup-

/ "y plied)

: DrainConnectorBlackPVC

3/4"(19.1mm)PVCX 1/2"

t (12.Vmm)CPVC

(Loosepartsbag)

/

_._ CasingGrommet

........ BlackRubber5/8"(15.9mm)CPVC

(Loosepartsbag)

25-24-82

All Models Vent through Right Side (SeeFigure15)

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 (2.26 newton meter) torque.
Using the 1/2" (12.7mm) OD barbed coupling in the loose parts bag

connect together with the 2 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" (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, or

• A 2" (50.8mm) PVC coupling fastened onto the drain tee.
Install tee trap into bottom section of tee.
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]

440 01 1051 03 Specifications are subject to change without notice. 23

Install the 1/2" (12.7mm) CPVC street elbow on discharge of trap
Install the black PVC tube connector [3/4" (19.1mm) PVC x 1/2"

(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.

Horizontal Left through Top

VentDrain
& Clamps

t_

Plastic Caps
Yellowor black

Alternate Orientation

Dual PressureSwitch

Single Pressure Switch Detail

_ ReliefTubeBlackRubber

3/16"(4.8mm)ID

oj JoJ

Flexibletubingconnector

3/16"(4,8mm)OD (Loose

PartsBag)

TrapConnection

[ / i _D ;_ ZZ" PontedOUT

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

"_ _,-_3J ,¢7\?,'/

/' i' "z "Clampears"

--_ .

Preassemble&
insertinto furnace

Field

SuppliedTee

TeeTrapWhitePVC

Coupling &Clamps /' DrainTube

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

Cap andClamp &Clamps
OpenEnd [_

BlackRubber

(loosepartsbag)

Representativedrawingonly,somemodelsmayvaryinappearance.

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 1/2" (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.

ReliefTubeExtension

.......... Black Rubber3116" (4.8ram)ID

.... Cutto Fit(LoosePartsBag)

RemoveKObefore
mountingTrap

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

Leaveroomforclamp

I

25-24-84

Connect the 3/16" (4.8mm) ID relief tube to the middle port on the
trap. Ifan 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. 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, or

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

24 Specifications are subject to change without notice. 440 01 1051 03

_i_i{{_;iii]i_i{!_iii1_i_ii}{{{{i_;i_;7_i_i_Hi{7_i_{{{iij;{{_iii_!iii;t_i!iii_ii_i{i_}!_jiii1_{ii_i¸

......L iii"°r'z°nt°l,o vont

Alternate Orientation

Field
Supplied Tee._\

TeeTrapWhitePVCj
(loosepartsbag)

OnSome / -
ModelsONLY

Single Pressure Switch Detail

TrapConnection

...... _,_

Yelloworblack

Plastic Cap

i

l-

-i-

x
ILl

Level or Sloped towards Tee

i'

/

/'

/

/

\

/ \

Ii

_R ji

Z

]

/

-. _'_._'_._d_ ii

Dual Pressure Switch

ReliefTubeBlack Rub-

\

F _

...... ElbowTubeBlackRubber1/2"(12,7r

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

,/

/

& Clamps

Preassemble&
insertinto furnace

ID&Clamps(LoosePartsBag)

(LoosePartsBag)

DrainTubeBlackRubber

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

Im)

FlexibleTubeConnector3/16"
(4.8mm)OD(LoosePartsBag/)/X

ReliefTubingExtension/
BlackRubber3/16" (4,8mm)ID
Cutto Fit(LoosePartsBag)

Representativedrawingonly,somemodelsmayvaryinappearance.

Horizontal Left-Side Vent (SeeFigure17)

Remove the drain tee from the Vent Drain if installed.
Rotate the inducer 180° for a side vent after loosening the 4

inducer attachment screws. Reinstall and retighten the inducer
screws to 20" pounds (2.26 newton meter) 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. Ifan extension is required, use the black 1/2" (12.7mm)

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.

\.

/ /

/

/

\

\ ..... DrainTubeCorrugated/8 (15.9mm)

ID&Clamps

Cutatlstraightsection

C

Leaveroomforclamp _CutHere

Connect the 3/16" (4.8mm) ID relief tube to the middle port on the
trap. Ifan 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, or

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

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.

25-24-88

440 01 1051 03 Specifications are subject to change without notice. 25

Horizontal Right through Top

TrapConnection

Preassemble&
insertinto furnace

"Clampears"

PointedOUT

Single Pressure Switch Detail

WARNING \,

AddCapand \,

Clamp "

\

3/16"(4,8mm)ID
RubberTube

Coupling&Clamps
(Optional)_

\\\\\\

,\

,\

'\ L

Plastic Cap
Yelloworblack

II

/

/

VentDrain
& Clamps

Alternate
Orientation

Field

_</ SiuppliedTee

_u-I,"/TeeTrap

\ _" WhitePVC

oosepartsbag)

Elbow Tube Black Rubber 1/2"
ID& Clamps (Loose Parts Bag)

iNLET

OnSomeModels
ONLY

Dual PressureSwitch/_X

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

I

Leaveroomforclamp "CutHere

Representativedrawingonly_somemodelsmayvaryinappearance.

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.

/

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

BarbedCoupling 1/2" (12,7mm)
OD (LoosePartsBag)

25-24-89

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. 440 01 1051 03

Horizontal Right-Side Vent

Plastic Cap

Yelloworblack

Coupling&Clamps

Optional)

//

Single Pressure Switch Detail

ReliefTubeBlackRub-
ber3/16"(4.8mm)lD _-_

FlexibleTubingConnector

3/16(4.8mm)OD(Loose...............

PartsBag)

J-- o ; " /

ReliefTubeExtension ......-....

BlackRubber3/16" (4.8mm)ID
CuttoFit(LoosePartsBag)

Dual PressureSwitch/1_',!,_

DrainTubeCorrugated,5/8" ID & Clamps

Cutat straightsection

Leaveroomfor clamp Cut Here Clamps

Representative drawing only_some models may vary in appearance.

i DrainTubeBlack

Horizontal Right Side Vent (SeeFigure19)

Disconnect drain tee if installed
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

VentDrain
& Clamps

Field

_ SuppliedTee

/

TeeTrap

]q WhitePVC

_ ___-(loosepartsbag)

,4

/' /

Level or Sloped

f

/

towards Tee

-ElbowTube

BlackRubber

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

OnSomeModels

ONLY

INLET _/"

?

Alternate
Orientation

J

BarbedCoupling1/2" (12,7mm)

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

OD (LooseParts Bag)

25-24-84c

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, or

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

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.

440 01 1051 03 Specifications are subject to change without notice. 27

iiiiiMMii;iiii_iiiiiiiiii_;_;_;iiiiii@i¸iii_iiiii_?i£iix_iiiii/iiii;iiii/iiiiiii};iiii;ii!iMiiiiiiiiiiiiii¸I¸

.........................................................................................................................................................Trap and Main Drain Line

Connecting Tee Trap to Condensate

s

LU -4

t

I__ ........... _i

© /

OpenTee f

Evaporator _--_

Coil

DrainLine

(Optional)

/

/

,/

Condensate

Trap 25-24-85

Representativedrawin.qonly,somemodelsmayvaryinappearance.

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 rigid pipe or flexible tube.
Tube ID should NOT be less than 1/2, (12.7mm).

Connecting Vent and CombustionAir Piping

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.

Preassemble 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, or 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
furnace accessory bag and relocate to the open hole in the furnace
panel. Use four screws to seal the four mounting holes in the top
panel next to the hole plug. Drill four 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 Pipe Connection

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 on 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 loose parts bag 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. 440 01 1051 03

_i_i_i!iiiiiii_;_i1i_iii;_i_i_i;ii_i;;;i_i_i_i_i_i_;_i_

Proper Sealing Procedure for
Combustion Blower

RubberCoupling J . VentPipe

&Clamps- =_,_ _ .... (TopPanelExit)

/_, ..... _% NOTE: The 90 ° elbow is approved

- vent _'lpe _'"_ , ,

/

z for use Inslde the furnace ONLY.

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

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.

ConnectingVentPipesandTermination
(DirectVent)

NOTE: For direct vent applications, combustion air intake and vent
MUST terminate in the same atmospheric pressure zone. If

installation is in a cold climate (sustained temperatures 0°F and
belowfor 24ormoreconsecutivehours), increase the minimum distance
between vent pipe and air intake from 8" to 18".

NOTE:Built-in channelwill beangled5°to 10° also.

25-24-14a

Joining Pipe and Fittings

SEE VENT AND COMBUSTION AIR PIPING, vent and
Combustion Air Piping Guidelines inthis 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.

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 tempera-
ture type solvent cement. Poor joints may lead to

disconnected or leaking vent pipe joints allowing

carbon monoxide to enter the living space.

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, chlori-

nator 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 24.

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

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

8" 203=2mm*MIN. _ "18"(457.2mm)Minimumfor

20'(6.1 m) MAX / _.._ cold climates (sustained tem-

// / '% EXHAUS'r "_>_,---------_S_

f:::f INLET _k. / 12"

Sidewall Termination 12" (304.8mm)or

_ _ peratures0°F(-17°0) and below

_ _ for 24 or moreconsecutive

_ _F_F hours)

(304.8mm)

._J" MIN.

//'_\ W

._ "GRADE LEVEL

OR

SNOW LEVEL 25-00-05F

1. Cut pipe end square, remove ragged edges and burrs.

HorizontalTermination

Chamfer end of pipe, then clean fitting, socket and pipe joint

1.

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.

440 01 1051 03 Specifications are subject to change without notice. 29

Cut two holes. 21/2" (63.5mm) for 2" (50.mm) pipe, 3"

(76.2mm) for 21/2" (63.5mm) pipe, or 31/2 ,, (88.9mm) for 3"
(76.2mm) pipe. Do NOT make the holes oversized, or it will

be necessary to add a sheet metal or plywood plate on the
outside with the correct size hole in it.

2. Check hole sizes by making sure it is smaller than the
couplings or elbows that wilt 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" (19.1 mm) to 1" (25.4mm) and seat area between pipe

and wall.

4. Install the couplings, nipple and termination elbows as
shown and maintain spacing between vent and combustion
air piping as indicated in Figure 22 and Figure 23.

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 walt to protect the house exterior materials from flue
product or condensation (freezing) damage.

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.

Recommended Alternate Installation

i!_i _i forSustainedColdWeather[0°F(-17°C)&belowfor24

hoursormoreconsecutivehours]

EXHAUST

.. ................................... "--. _evel OR Snow Level

FRONT Vl EW

/

_,1_/ J2" (304.8mm)MIN.

OVERHANG

INLET

/

JL

..........12" (304.8mm) MIN. Ground

SIDE VIEW

¢.,. "S,°ewa,,toTerm,n°.,onw,t.Ex.er,Oror

Risers Get Above Snow Level

Grade Level

8" (203.2mm)* MIN. _ "18" (457.2mm) Minimum for

20' (6.1m) MAX z jz,-_ _ coldclimates[sustained0°F

._ _ z_y. (-17°C) and belowfor24 or

j_z _ - moreconsecutivehours]

iii/iiiiii__iiiili!ii;iiiiiJi Rooftop_rmination

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

/ ..... i

/!:::::::_ _ -" i 12 " (304.8mm)

/(:::_ _ MIN.

," j INLET3J /

EXHAUST J/_

.-J ',, GRADE LEVEL

/;;} .J ' OR

-q'_-/ SNOW LEVEL 25-00-04F

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" (307.8mm) above
the roof or snow accumulation level, and 12" (307.8mm)

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.

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 be-

low for 24 or more consecutive 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.

SameJoist

J

Space

12"

_./ 104"8mm)

25-23-73

30 Specifications are subject to change without notice. 440 01 1051 03

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, Figure 29, Figure 30 and Figure 24, 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.

;:;ii _(

Concentric Vent and Combustion-

Air Roof Termination

_i_i;:iii_i_ii_i1_!!_i_i¢_i_ii_ii1_i_!i_i!_i_i_i;i_iiii_:

Sidewall Inlet Vent and Exhaust-Air
Termination with Exterior Risers

- 7_L_ 8" (203.2mm)Min. D- /j _1_ 4ii7--
_--_---_- >_ 20' (6lm) Max [_ _ __----_8" (203,2mm)Mm.

:>_ ::_M-_-- .t, I ..... __-_ / / _-_

:_%_W-< 7k-_;;;----i Z ' { ( _L :\ '__---i

:---.:_:-m:::W---_-_-_- F---4 _ '., L f "

1:::__-Exhaust_-,_ i/ +/-- ]_--_ _:-_ -T"_I_ /_ 12" (457.2mm1

/" / /-" _ _ _ _---J -i Jk. j_ Inlet Min.Gradeor

, i_ _:_ _, _,_ / SnowLeve

_---__ UI -- 7"_ ,' ' -

_2" (50.8mm) Max 36" Min

'in. Grade or t _-- /_ - _ --J36"Min-_

i[i}[ J Ji] }

Concentric Vent and Combustion-

Air Sidewall Termination

_ - .... J- ...... jj .....

JJJ "_ll "---J ....

................ _-... 1" (25.4mm) .......

/J J- .....

CombustionAir ....... Maximum _.__----.............

.................... ..................................

........... \r ,_ '__._.xj_.<,-r L ........

.......... ----_--r-\_F?:;:_-_--.i........'

), L [ .......i .... I_-m!:A......

1/ f_'_ _ .-J ....................18"(457.2mm)lin. for Cold Climates

\- _--_' / ,,A,;........ [Sustained 0°F(-17°C) and below for

. J _J- 24 hours ormore consecutivehours]

Dimension "A" is touching or 2" (503.8mm) maximum separation.

iiiiiiiiliiiiiilJiiiiiil;;iiiillIliiiiiiiiiiii!ii!iiiii{iiiii:iliiI!!Iii11iliiiii!ii¢illi!i

iliiiii I III!IilI!Rooftop inlet Vent and Exhaust-

Air Termination

_1_',, 8" (203.2mm)Min. ".... ,,____,_ts_

_",,",, 20' (6.1m1 Max. _1 ' ' ..... "

,,,, ...... ,, !-4/_. _ ..........,, _ , .:__

", ",, ]__"-_, "*,:-t-- ._,--'<,," ",__Exhaust

12" (304.8mm1 ", 'L --_"7-- -. '_--- _,.-;'----}'-, ............;'--"7 .................

Min.Gradeor ',,,, _;.- -'_ X .......... _.......

SnowLeve ',,',,, ....;_...... .--- 18" (457.2mm)Min.for ColdClimates

,,]..... ............ [Sustained0°F(-17°0) andbelowfor

/"4........... 24 hoursor moreconsecutivehours]

...............j /_l ...._, .....

Vent 25-22-02d

Dimension "A" is touching or 2" (503.8mm) maximum separation.

Sidewall Inlet Vent and Exhaust-

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii Air Termination

i-::t-_::-_zt_LJ--Lt--iC]_-:_>_::<-tiJ----l::<-XL_--Lt_-C_-;....

z .j--j_%.<-S_zl_.._--- j Jj..j_ Exnaust.... W/" -.__

S:_--?:b--_-vW->iJ---L_.- ..........._/" _.___ /2+_......

......:>-[;<.-_j>---.,,^,,- ........ ,, : l-_7:-_-_,t/ _\\

...... Inlet _<..-- //_ ......... J {._._ .-

........ Dimension "A" is touching or 2" (50.8mm) maximum separatior

440 01 1051 03 Specifications are subject to change without notice. 31

"ili_' i':_- _ \' ........... J8" (203.2mm] Min. -.........

1\ f ' I-jjZ _....... 20' (6.1m)Max.

_ ,, __ __ ,i.- --j j-

12"(304.8mm)Min. - [Sustained 0°F(-17°C) and below for

Grade orSnowLevel 24 hours ormoreconsecutivehours]

j.jJJ_

..... .---/ 18" (457.2mm)lin. for Cold Climates

Concentric Termination

ConcentricVentTermination- Kit#

NAHAO01CV& NAHAO02CV

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 4
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.

t;;' : Concentric Termination Kit

_ NAHA001CV & NAHA002CV Venting

Table for *9MPX Models

60,000 Btuh Furnaces

NAHAOO2CV- 35' (10.7m) & (4) 90°elbows

with 2" (50.8mm)PVC pipe or

NAHAOOICV- 65' (20m)& (4) 90° elbows

with 3" (76.2mm) PVC pipe

80,000 Btuh Furnace

NAHAOO2CV- 35' (10.7m) &(4) 90° elbows

with 2" (50.8mm)PVC pipe or

NAHAOOICV- 35' (10.7m) & (4) 90°elbows

NAHAOOICV- 35' (10.7m) & (4) 90°elbows

1. Do not include the field supplied 45° elbow in the total elbow
count.

2, If more elbows are required, reduce the length of both the inlet

and the exhaust pipes five feet (1,5m) for each additional
elbow used.

3, Elbows are DWV long radius type for 2" and 3" (50,8mm and

76,2mm) vents,

NOTE: The minimum vent length is 5' (1.5m) of PVC. Feet (mm) of
pipe is whichever pipe length is the longest, either inlet or outlet

side.

with 3" (76.2mm) PVC pipe

100,000Btuh Furnace

NAHAOO2CV- 5' (7.6m) & (2)90° elbows

with 2" (50.8mm)PVC pipe or

with 3" (76.2mm) PVC pipe

Do not use field supplied couplings to extend the pipes.
Airflow restriction will occur and the furnace pressure switch
may cause intermittent operation.

Gas Supply and Piping

Do not allow minimum supply pressure to vary downward.
Doing so wilt decrease input to furnace. Refer to Table 5for

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.

GasSupply Requirements

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 in failure of heat exchanger
and cause dangerous operation.

32 Specifications are subject to change without notice. 440 01 1051 03

Gas supply. Refer to Table 6 or Table 7 for manifold
pressures.

GasPressures

Gas Type Supply Pressure

Recommended Min.

Natural 7 in wc 4.5 in wc

(1.8 kPa) (1.1 kPa)

Propane 11 in wc 11 in wc

(2.8 kPa) (2.8 kPa)

GasPiping Requirements

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.

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.

Max.

14 in wc

(3.5 kPa)

14 in wc

(3.5 kPa)

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 and 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.

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.

iiiiii_iiiiii_ii!iiiIi_iiiiii}_iiii_i_.i_!_iiiii!_iii_i.`.iiii!iiiii_i?_.i_i_i_iiiiiiijii!i!!!iiii_ii1!!jii_iiii_ji!iii

Typical Gas Piping for Upflow

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.

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.

DripLegandUnion,Union*shouldbeoutsidethe

VentPipeGrommet(SinglePipe)

cabinet.Manualshut-offvalveMUSTbeupstreamof Manualshut-off

dripleg,union,andfurnace. -......... valve

Useelbowsand3"(76.2rnrn)pipenippletoconnectvalveto ................

pipingwhenusing..............rightsidegaspipeentry. __'_._" _- i_X_:_

, , _ _._ ] Q _ -- \ /

PropaneLowpres-_ _>> 3" (762mm) _ ._

sureswitch _. J/ pipe " _" ............

REQUIRED. nipple

_" "-. press_

* Union may be installed inside the cabinet when necessary

because of clearances. _\ _

Representativedrawingonly,somemodelsmayvaryinappearance. _/_

have 1

switch

•Alternative

installation

may

or 2
re

8S

25-24-86

440 01 1051 03 Specifications are subject to change without notice• 33

iiii/_iiiii!ii__J__//ii;liMiii!iiiiiiiiiii/ii/!!Iii:i:i:ii/iiiiiiiiiM7iiii/iiiiiii//ii!!!iiiiii{iiiii///!liiiiiiii!{i

_ _iU _i_ _, Typical Gas Piping forDownflow

Use elbows and 3" (76.2mm) pipe nipple to connect ........

valve to piping when using left side gas pipe entry. _"- "--_

_W _ _s_#7 ! 7 Propane Low pressure _" "_.; " /

\_ '(('_ _2,/ switch. Optional \_

_ _ Propane conversion. _" .................

" ............. Manualshut-off

Drip Leg and Union, Union* should be outside the cabinet.
Manual shut-off valve MUST be upstream of dripleg, unio ,r_i_

and furnace. /

*Union may be installed inside the cabinet when necessary (Single Pipe)

because of clearances.

Representative drawing only_some models may vary in appearance,

valve _

Vent Pipe Grommet

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.

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.

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.

SupplyPressure

FIRE HAZARD
Failure to follow this warning could result in

personal injury, death, and/or property damage.
Do NOT set input rating above that shown on rating

plate.

1. A 118" NPT plugged tapping, accessible for a test gauge
connection, must be installed immediately upstream of the
gas supply connection to the furnace.

2. Gas input to burners MUST NOT exceed the rated input
shown on rating plate.

3. Do NOT allow minimum gas supply pressure to vary
downward. Doing so will decrease inputto furnace. Refer to
Table 6 and Table 7 for normal gas supply and manifold

pressures.

ManifoldGasPressureAdjustment

SEE CHECKS AND ADJUSTMENTS, Manifold Gas Pressure
Adjustment inthis manual.

34 Specifications are subject to change without notice. 440 01 1051 03

NATURAL GAS MANIFOLD PRESSURE (in wc) 20,000 BTU per burner*

i!j

MEANELEVATIONFEETABOVESEALEVELft (m)

HEATING

VALUE

BTU/CU.

FT.

700
725

750
775

800
825

850
875

900
925

950
975

1000
1050

1100

* When installing the 100,000 BTU furnace in downflow or horizontal positions, firing rate is reduced to 19,500 BTU/celI. Subtract

0.2" w.c from the manifold pressures listed in table above for the correct manifold pressure.

Conversion:1inwc=.25kPa
Bold- indicates factory orificesize.

NOTE: Natural gas data is based on 0.60 specific gravity. Forfuels with different specific gravity consult the National Fuel Gas Code ANSI
Z223.1/N FPA 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.

1- 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

1371.6m) above sea level. Use the 2001 to 3000 (609.9 to 914.4m) column in Table 6 and Table 7.

0to 2000 2001to 30001 3001to 4000 4001to5000 5001to 6000 6001to7000
(0to 610) (610.1to 914)1" (914.1to 1219) (1219.1to 1524) (1524.1to 1829) (1829.1to 2134)

Orifice Orifice Orifice Orifice Orifice Orifice

Mnfld Mnfld Mnfld Mnfld Mnfld Mnfld
Press Press Press Press Press Press

, , . 44 3.7 44 3.4
. . , 44 3.5 44 3.2

44 3.5 44 3.2 44 3.0

44 3.6 44 3.3 44 3.0 44 2.8

44 3.7 44 3.4 44 3.1 44 2.9 44 2.6
44 3.5 44 3.2 44 2.9 44 2.7 44 2.5

44 3.5 44 3.3 44 3.0 44 2.8 44 2.5 47 3.4

44 3.7 44 3.2 44 2.9 44 2.7 44 2.5 48 3.7 48 3.4
44 3.5 44 3.0 44 2.8 44 2.6 47 3.4 48 3.5 48 3.3

44 3.3 44 2.8 44 2.6 47 3.5 48 3.7 48 3.4 49 3.6
44 3.2 44 2.7 44 2.5 47 3.3 48 3.5 48 3.2 49 3.4

44 2.9 44 2.5 48 3.7 48 3.4 49 3.7 ........

46 3.3 48 3.7 48 3.4 49 3.7 ............

44 3.3 44 3.1 44 2.8 44 2.6 47 3.5 48 3.6

7001to 8000

(2134.1to 2438)
Orifice

Mnfld

Press

44 3.7

LPG or PROPANE GAS MANIFOLD PRESSURE (in wc)

HEATING FURNACE MEANELEVATIONFEETABOVESEALEVELft (m)

VALUE

BTU/CU.

FT. BURNER (0 to610) (610.1to914)1" (914.1to1219) (1219.1to 1524) (1524.1to 1829) (1829.1to2134) (2134.1to 2438)

2500 10.0 8.9 8.4 10.0 10.0 10.0 10.0

OrificeSize 20000 #55 #55 # 55

2500 9.9 8.4 8.0 10.0 10.0 10.0 9.6

OrificeSize 19500:1: #55 #55 # 55

Applies to 100,000 BTU models when installed in the downflow or horizontal applications

Conversion:1inwc=.25kPa
NOTE: Propane data is based on 1.53 specific gravity. For fuels with different specific gravity consult the National Fuel Gas Code ANSI

Z223.1/N FPA 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.

1- 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

1371.6m) above sea level. Use the 2001 to 3000 (609.9 to 914.4m) column in Table 6 and Table 7.

The burner orifice part nos. are as follows: General Berating Rules

Orifice Part # Orifice Part #

INPUTBTU/ 0to 2000 2001to 30001" 3001to 4000 4001to5000 5001to6000 6001to 7000 7001to 8000

1. These furnaces may be used at full input rating when

41 1096942 42 1011351
43 1011377 44 1011352

45 1011353 46 1011744
47 1011378 48 1113201
49 1113202 54 1011376

55 1011354 56 1011355

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' 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 6 orTable 7 for required high altitude

input rate.

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 6 for

required pressure change and/or orifice change for high
altitudes.

440 01 1051 03 Specifications are subject to change without notice. 35

3.

For operation with Propane gas, gas orifices MUST be
changed and manifold pressure MUST be maintained as

per Table 7. Orifices can be ordered through our distributor.
(See Figure 33)

Nameplate Sea Level Input Rate x (Multiplier) "1"

Elevation

2001' - 3000'1"

(609.9 - 914.4)1" 0.95 0.90

3001' - 4000'

(914.7 - 1219.2) 0.93 0.86

4001' - 5000'

(1219.5 - 1524) 0.91 0.82

5001' - 6000'

(1524.3 - 1828.8) 0.89 0.78

6001' - 7000'

(1829.1 - 2133.6) 0.87 0.74

7001' - 8000'

(2133.9 - 2438.4) 0.85 0.70

* Based on mid-range of elevation.

High Altitude Input Rate =

High Altitude Multiplier

Natural Gas Propane Gas

NaturalGas InputRatingCheck

SEE CHECKS AND ADJUSTMENTS, Natural Gas Input Rating
Check in this manual.

Changing Orifices

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

Measure from face of orifice

FinalGasPipingCheck

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.

* In the USA, derating of these furnaces at 2% (Natural Gas)

and 4% (Propane Gas) has been tested and design-certified
by CSA.

1- 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

to1371.6m) above sea level. Use the 2001 to 3000 (609.9 to

914.4m) column in Table 6 and Table 7.

Changing Orifices for 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.

36 Specifications are subject to change without notice. 440 01 1051 03

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 1/2z" PSIG. Close the manual shut-off valve before testing
at such pressures.

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 por 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.

2. When installation is complete, test all pipe connections for
leaks with the gas pressure less than /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 /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.

1

1

Electrical Wiring

with manufacturer's instructions. The wiring MUST have a
minimum temperature rating of 105 ° C.

ELECTRICAL SHOCK HAZARD
Failure to follow this warning 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 connec-

tion is made before connectin£1 line volta£1e.

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 63° F (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 amp 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 importanteffect 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.

When using a nonelectronic thermostat, the thermostat heat

anticipator must be set to match the amp draw of the electrical
components in R-W circuit. Accurate amp draw readings can be

obtained at thermostat subbase terminals R and W. For an
electronic thermostat, set cycle rate for 3 cycles per hour.
Measure heat anticipator current in series from R to W at the

thermostat. If 24VAC humidifier is wired up to control, humidifier

must be energized. Allow furnace to operate for two minutes
before recording the AC amperage reading. Set anticipator on

thermostat to recorded value.

OptionalEquipment

All wiring from furnace to optional equipment MUST conform to

local codes or, inthe 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

440 01 1051 03 Specifications are subject to change without notice. 37

Humidifier/ElectronicAir Cleaner

The furnace is wired for humidifier and/or electronic air cleaner
connection.

REDUCED FURNACE LIFE HAZARD
Failure to follow 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 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, except is NOT energized when blower
operates inthe hard-wired continuous fan mode.

FurnaceControl

The furnace control is preset at the factory with a fixed blower ON
delay of 30 seconds inthe heating mode. The blower OFF timing is
preset at 140 seconds. Ifdesired, 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 Boxcan be
mountedto eithertheleftorright

side.

115V.60Hz

Models may
have 1 or 2

Box

Gr=_nd

LowVoltage

TerminaIBoard

NOTE: 115VAC/60Hz/single-phase
Operating voltage range*: 127 VAC max, 104VAC min.

* Permissible limits of voltage at which unit will operate satisfactorily

somemodelsma

pressure

/

_25-24-90-2

./

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.)

Ductwork and Filter

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

Control Board

BlowerOff _
DelayJumper_ _,

24VAC _d._

HUM........._-_

FU

Connections

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.

NOTE: On upflow installations, return air can enter through either
side, both sides, or the bottom. On horizontal 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 inan 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.

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.

iiiiiii_iiiiii_iiiiiiiii_i;;iiiiiIII_ii;i;_iiii11ii_iii_i!!iiiii!_iiiiiiiii!ii:i_iiiiiiiii!iiii!!iiiiii_Iiiiiiii;iiiiiiii!iiiiiii;i

SideReturnAirCutout

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

1

A= 14/2" (368,3mm)HeightofCutoutfor16"x25"(406,4x635mm)Filter

1

B=22/2" (571.5mm)Widthof Cutoutfor16"x25"(406.4x635mmFilter

CARBON MONOXIDE POISONING HAZARD

EmbossedArea J
on Side of Furnace _

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

Cool air passing over heat exchanger can cause
condensate to form resulting in heat exchanger

failure.

38 Specifications are subject to change without notice. 440 01 1051 03

Furttace

NOTE: Furnaces with 5 ton cooling rating may require both
(left and right) side return or one side and bottom return.
Side return air duct(s) is not permitted with horizontal furnace

installation.

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.

* See Circulating 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

Bottom Mounted Filter Rack

9" (152.4mm) _._J 25-24-18-1

Slide filter clips towards back before removing

Filter Clip Construction

11_,, \\ _-,\

/2 j-_.. _-_.

-4_(381) _/ \\ \\-

26 Ga. Galvanized Steel -\ ).
FASTpart number 1008482 "_'_ 11/16"(27)

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.

Standoff Filter Rack

UsingOptional
StandoffFilter
Rack

25-20-90

FilterInstallationusing OptionalFilterRack

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,

440 01 1051 03 Specifications are subject to change without notice. 39

AdditionOfAir Conditioning

When a refrigeration coil is used in conjunction with this unit, it must
be installed parallel with or on the discharge side of the 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,

t_25-21-45a

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" clearance is required on the right side of the furnace in order to

run the condensate drain line. Copper or plastic tubing may be
used for the condensate drain line.

DownflowFurnaceInstallation
Non-CombustibleFloorInstallation

Fabricate a plenum to the dimensions given in Figure 4, for the

furnace outlet. Plenum should be flanged, approximately 3/4"

(19.1 mm)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 application sin addition to a coil box
installation.

Subbase for Combustible Floor

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

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.
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 8. The hole in
the floor must be cut to the dimensions listed in Table 8

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 8.
Note that the dimensions given are outside dimensions.

3. Set the base over the opening inthe 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.

Sub-base for

Combustible Floors

Part Number

FurnaceOnly

NAHH001SB (398.5) (730.3) (369.9)

NAHH002SB (490.5) (730.3) (462)

NAHH003SB (582.6) (730.3) (554)

NAHH010SB (627.1) (730.3) (598.5) 16(406.4)

Subbasefor CoilBox

NAHH004SB (25.4) (522.3) (369.9) (408)
NAHH005SB 19_/8 20_/16 18_/16 161/16

NAHH006SB 23 (284.2) (522.3) (554) (408)

NAHH009SB (628.7) (522.3) (598.5) (408)

OutsideDimension

** BaseSpacerSideToSide
Conversion:1 in=25.4 mm

Subbases for Combustible Floors Dimensions - in(mm)

Sub-base for Combustible

Floor Dimensions OpeningIn Floor

H* J* K** L M N

1511/16 28_/4 14u/16 16(406.4)

19_/16 28_/4 18_/16 16(406,4)

221=/16 28_/4 211_/16 16(406,4)

241t/16 28_/4 23u/16

15_/4 20u/16 14u/16 16_/16

(181.1) (522.3) (462) (408)

20u/16 211"_/16 161/16

24_/4 20_/16 23_/16 161/16

16_/4 14=/8 13_/2

(412.8) (371.5) 15 (381) (342.9)

16_!4 18_!4 15 (381) 17'!8

(412.8) (463.6) (435.6)

16_/4 21t/8 19_/4

(412.8) (555.6) 15 (381) (501.7)

16 _/4 23=/8 22 _/2

(412.8) (600.1) 15 (381) (571.5)

16_/4 14=/8 13_/2

(412.8) (371.5) 15 (381) (342.9)

16_!4 18_!4 17V8

(412.8) (463.6) (435.6)

16_/4 21_/8 19"_/4

(412.8) (555.6) 15 (381) (501.7)

16_/4 23=/8 22 '/2

(412.8) (600.1) 15 (381) (571.5)

Opening In

Base For Plenum

P R

15(381)

Typical Plenum

Dimensions

S

15(381) 13V2

15(381) (435.6)

15(381) (501.7)

15(381) (571.5)

15(381) (342.9)
15(381)

15(381) (501.7)

15(381) (571.5)

(342.9)

17'/8

19_/4

221/2

131!2

17V8

(435.6)

19_/4

22'/2

40 Specifications are subject to change without notice. 440 01 1051 03

///il///i!!iiii/i;iiiiii!_iiii/ii!li}i¸i_iiiiii¸ii_i/iiiii/iiiiiiii///iii_ii_!ii_lii!ilii/i

iiiii_iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii Furnace ON LY

jl_r_ s

_;_ Plenum _#_

•.1, H_ I_ 2" (50.Smm)

A = 4 1/4" (108mm) Minimum
clearance from back of hole
to wall or other obstruction.

i i:: t: iii

Exploded View of Base for
Downflow Cased Coil

%..

_.. _

21/2" (63.5mm)

(50.8mm) L _

5. Position furnace or coil cabinet and furnace on subbase so it
aligns between the locating tabs.

Fig_43': Setting the Subbase

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J

Furnac_' \/_\

Installation of _ _IL
Combustible

Floor Base

_-_._:@::/::::: i I \._._._ Wood Floor

Plenum

25-20-46a

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.

11/2" (38.1mm)

iliiiiiI! i iiCondensate Line Raised by Base

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

I
I

I
I

25-20-5;

A 3" (76.2mm) clearance is required on the right side of the furnace
in order to run the copper or plastic tubing for the condensate drain

line.

Checks and Adjustments

NOTE: Verify the input rate of the furnace.

FIRE OR EXPLOSION HAZARD

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.

Failure to follow this warning
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.

GasSupply Pressure

Startup

NOTE: Refer to the start-up procedures in the "User's Information

Manual" or to the "Operating Instructions Label" on the furnace.

Gas supply pressure should be within minimum and maximum
values listed on rating plate (minimum and maximum pressures,
refer to Table 5). Pressures are usually set by gas suppliers.

ManifoldGasPressureAdjustment

NOTE: Make adjustment to manifold pressure with burners

operating.

440 01 1051 03 Specifications are subject to change without notice. 4t

could result in

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 inches of water
column range.

4. Turn gas ON and remove adjustment screw cap on gas

valve. Turn adjusting screw using 3/32 hex wrench,

counterclockwise to decrease manifold pressure and
clockwise to increase pressure.

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 6 or

Table 7 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.

Fi_ _ _ii,ii_1Typical Gas Control Valve

RegulatorAdjustment
UnderCap

INLET

Inlet
Pressure

Tap 1/8 NPT z

Outlet
Pressure

Tap

1/8NPT

j_---

OUTLET

Example (kW)

Number of

seconds per seconds per Size of test dial

hour complete (.05m3) kW m3/h

3,600 80 .05 2.25

3. Remove jumper wire from R to W.

4. Relight all appliances and ensure all pilots are operating.

Number of

rotation

3,600+ 80 x .05= 7.2 m3/h

2.25m3/hx 10.35kWh/m 3= 23.28 kW

23.28 x 3.412 =79,431 BTU

MainBurnerFlameCheck

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.

o,n..rner

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

r Face

NaturalGasInput RatingCheck

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 all appliances and start furnace.
Use jumper wire on R to W for Heat.

2. Time how many seconds it takes 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.

Example (BTUH)

Natural Gas BTU Per
BTU Content Hour

1,000 3,600 48 75,000

TO Determine the appliance kW input rate from a .05m3 test dial
that has been clocked at 80 seconds for one complete revolution.

No. of Time Per

Seconds Cubic Foot in
Per Hour Seconds

1,000 x 3,600+ 48 = 75,000 BTUH

10-10-78

NOTE: For Ignitor location see Figure 47.

, n,,or,oco,,on

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

21/16(52.4)

5/16(8)_ F

NOTE: Flame sensor has a different orientation in all 050 models.

TemperatureRiseCheck

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.

42 Specifications are subject to change without notice. 440 01 1051 03

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 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.

REDUCEDFURNACELIFEHAZARD
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.

1. 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 9) to determine the blower motor speed

settings.

Motor Speed

High

Med-High

Medium

Low

Furnace Maintenance

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 "coor' 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 Continuous Fan 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 will 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 Speedthe

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.

FIRE, EXPLOSION, OR CARBON MONOXIDE
HAZARD

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

It is recommended that the furnace be inspected
and serviced on an annual basis (before the heating
season) by a qualified service technician.

See "User's Information Manual':

ELECTRICAL SHOCK, FIRE OR EXPLOSION
HAZARD

Failure to follow this warning could result in
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.

440 01 1051 03 Specifications are subject to change without notice. 43

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 on a 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 17 second 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 isa blower speed call. It is NOT energized when blower operates in the

hard-wired continuous fan mode.
NOTE 4) Ifa 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.

44 Specifications are subject to change without notice. 440 01 1051 03

HeatingRequestwith GasShutOff:

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.

ControlBoardDiagnosticCodes (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)

If code repeats immediately following power reset then replace control

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 (3hr delay)
7 Flashes = Soft Lockout - Limit or roll-out switch open longer than 2 minutes (1 hr delay)

(roll-out switch requires manual reset)
8 Flashes = Permanent Lockout - Gas valve relay contact stuck closed or miswired gas valve (power reset only)
10 Flashes = Line voltage (115VAC) polarity reversed. Iftwinned, 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.

* Proper flame sense microamps: 0.7 microamps D.C. minimum

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

DiagnosticLight

115VAC

L< 25-24 -98

2.0 - 4.0 microamps nominal

440 01 1051 03 Specifications are subject to change without notice. 45

CONNECTION DIAGRAM 1 WARNING:ELECTRICAL SHOCK HAZARD l LADDER DIAGRAM zoo

ROLLOUT SWITCH 1 TO 2 TO 115VAC FIELD DISCONNECT

IN SERIES DEPENDING ON MODEL COPPER CONDUCTORS

R m 0 + Z_Iz

_0 m m c0c_ F-mr-

DEPENDINGONMODEL \ MOIOR J _ rlUUI BK | --z mOO

DISCONNECT BEFORE SERVICING m o o

( O o-nu /

GND _. i m C] m /

:::,L. ±

GRNHI NOTE,,2

--_F------W_SENSORE3:_P4 / _ M"

mml 100 180 60SEC

-H 60 140

ROLLOUT SWITCH ] TO 3

HEAT COOL

- :': _,

_W

1. If any of the original equipment wire is replaced use wire rated 1050 C. SPEED TAP CODE

fanyoftheo _

Jse only cop_ 140SEC

2. Use only copper wire between the disconnect switch and the furnace BK

3. This wire must be connected to furnace sheet metal for control to

4. Symbols are electrical representation only. GREEN!YELLOW

5. Solid lines inside circuit board are printed circuit board traces and are
not depicted as shown in the legend.

Thisjunctionprovewireflame,box.mu: ORANGEREDBLUEBLACK_ MLO _MHILOHI,...,..,..j._LOW_1_1E_uA_KWHITEGREENG!_GREEN!YREDBROWN YW0RGRN/YBRBK _"__ 1ooJl 180

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 LOW VOLTAGE FACTORY

Adapter Accessory Kit) are not installed.

9. Blower off-delay, gas heating selections are (60, 100, 140, and 160)
seconds, cooling or heat pump 90 seconds. _ LINE VOLTAGE FACTORY

lO. Ignition lockeut will occur after four consecutive unsuccessful trials for _ _ . LINEVOLTAGEFELD

ignition. Control will auto-reset after three hours.

11. Blower motor and inducer motor contain internal auto-reset thermal CONDUCTOR ON CONTROL

overload switches.

12. Flame sensor: 0.7 pA D.C. minimum, 2.0 -4.0 pA nominal. UNMARKEDTERMINAL

13. Depending on model, P4 inducer motor leads and P5 gas valve leads may CONTROLTERMINAL

be in asingle connector or two quick connectors.

-- LOW VOLT/ 80

..... LOW VOLTAGE FIELD

.... LOW VOLTP

LINEVOLTA

_ LINEVOLT,_

JUNCTION

0

CONDUCT( _D

[ CONTROLBOA

I P1-10 LPPRESSSWITCH

TRANSFORMER

333309-10I REV. B

Q

_>oo

x

100SEC. _l_

95% Furnace

Up flo w/Ho rizo ntal/D own flo w

Models

Dual Certified

*9M PX060F 12A2

*9M PX080J 12A2
*9M PX080J 16A2

*9M PX100L20A2

* Denotes Brand

\

\

International Comfort Products, LLC
Lewisburg, TN 37091 U.S.A.

Save This Manual For Future Reference

44001 105103 Specifications are subject to change without notice 47

Model Specifications (*9MPX)

TECHNICAL SUPPORT

Manufacturers Number (Mfr No-See Rating Plate)

ALL Models

General

GasType
Input(Btuh)

Output(Btuh)

TransformerSize (VA)
Tstat Heat Anticipator

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 On
(Timed-secs) Off

Combustion
Flue Outlet Size (Inches)
Std. Outlet Temp (less than) °5' No Elbows (°FPC)

BlowerPressure5' No Elbows (in wc/Pa)
BlowerPressure40' +5-90 ° DWV Elbows (in wc/Pa)

Transition Bx Pressure 5' No Elbows (in wc/Pa)

TransitionBxPressure40' +5-90 ° DWV Elbows (in wc/Pa)

Limits &Controls
RolloutSwitch (°F/°C)

LimitControlSetting (°FPC)

AuxilliarySwitchSetting (°F/°C)

Standard Pressure Sw. (Part No)

Blower Switch Pressure (Close) (in wc/Pa)

Blower Switch Pressure (Open) (in wc/Pa)
Transition Switch Pressure (Close) (in wc/Pa)
Transition Switch Pressure (Open) (in wc/Pa)

High Altitude Pressure Sw. (Part No)

Blower Switch Press (Close) (in wc/Pa)

Blower Switch Pressure (Open) (in wc/Pa)
Transition Switch Press (Close) (in wc/Pa)

Transition Switch Pressure (Open) (in wc/Pa)

Blower Data
BlowerSizeInchesDx W - in(mm)

MotorAmps/RPM
MotorType/H,E

Cap,Mfd/Volts
FilterType&Size (mm)(qty.)Permanent- notsupplied

CoolCap. (Tons)@ .5 inwc (125Pa)- L,ML,MHi & Hi

GasConversionKits

Natto Propane
PropanetoNat

**Order from Service Parts

Upflow
Downflow/Horizontal

Upflow
Downflow/Horizontal

NAHA00701LP(1178473'_)
NAHA00701NG (1178474**)

Specifications (*9MPX)

*9MPX060F12A *9MPX080J12A *9MPX080J16A *9MPX100L20A

Nat./Propane

60,000
60,000

58,000
58,000

40

.50

30-60/17-33

115!60

10

Nat, Propane

3.5/872 10.0!2490
3/44 3/55

140/60

-1.8/-448

-1.7/-423

-3.2/-797

-2.9/-722

300/148
250/121

1177767
0,58/144
0,43/107

1,73/431

1.70/423
1177767

0,58/144
0,43/107
1,73/431

1.70/423

11x10(279x254)

7.2/1020
PSC!I_

7,5/370

16x25xl

(406x635x25)

11/2through3

Nat./Propane

80,000
80,000

77,000
77,000

4O

.50

35-65/19-36

115!60

10.5

Nat. Propane Nat.

VR8205S

SNAP

HotSurface

3.5/872 10.0/2490
4/44 4/55

30

60,100,140,180

140/60

-1.9/-473

-2.0/-498

-3.2/-797

-2.9/-722

300/148
250/121

160/71

1177764

0.95/237

0.80/199

1.89/471

1.55/386
1177768

0.95/237

0.80/199

1.61/401

1.43/356

11x10(279x254)

5.7/1075
PSC/1/3

10/370

16x25xl

(406x635x25)

11/2through3

Nat./Propane

80,000
80,000

77,000
77,000

4O

.50

30-60/17-33

115!60

13.6

Propane

3.5/872 10.0/2490 3.5/872 10.0/2490
4/44 4/55 5/44 5/55

140/60

-1.9/-473

-2.0/-498

-3.2/-797

-2.9/-722

300/148
220/104

1177764

0.95/237

0.80/199

1.89/471

1.55/386

1177768

0,95/237

0.80/199
1,61/401

1.43/356

11x10(279x254)

10/1050
PSC!I_

10/370

16x25xl

(406x635x25)

21/2through4

Nat./Propane

100,000

97,500
96,000
94,000

40

.50

30-60/17-33

115!60

14.8

Nat,

Propane

140/60

-2.3/-573

-2.4/-598

-3.2/-797

-2.9/-722

350/177

190/88

1174465

1.56/396
1,38/344

2,32/578

1.66/413
1177769

1.30/324

1.14/384

1.97/491

1.78/443

11x10(279x254)

11,5/935

PSCf3/4

40/370

16x25xl

(406x635x25) (2)

31/2through 5

48 Specifications are subject to change without notice. 440 01 1051 03

CIRCULATION AIR BLOWER DATA (CFM & L/s)

*9MPXO60F12 (1)(2) * Denotes Brand *9MPXO80J16 (1)(2) * Denote Brand

Rnrl_,_ee_ HI MED H MED L LO

Tap

in wc Pa CFM L/s CFM L/s CFM L/s CFM L/s

"_ 0.1 25 1478 697 1204 568 901 425
mm 0.2 50 1418 669 1154 545

_. _" 0.3 75 1350 637 1103 521

O n

'_ 0.4 100 1280 604 1053 497

,- 0.5 125 1201 567 993 469

"_" 0.6 149 1116 527 924 436

-_ 0.7 174 1023 483

LLI

0.8 199 931 439

0.9 224
1 249

*9MPXO80J12 (1)(2) * Denotes Brand

Speed HI MED H MED L LO

Tap

in wc Pa CFM L/s CFM L/s CFM L/s CFM L/s

•_ 0.1 25 1456 687 1326 626

0.2 50 1440 680 1312 619

_. _" 0.3 75 1420 670 1280 604

08.

_ 0.4 100 1379 651 1241 586

,- 0.5 125 1325 625 1209 571

_ 0.6 149 1261 595

0.7 174 1208 570

LLI

0.8 199

0.9 224
1 249

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.

(1) Data Based on Bottom Only or One Side return.
(2) Gray area is above maximum temperature rise range.

Speed HI MED H MED L LO

Tap

in wc Pa CFM Us CFM L/s CFM Us CFM L/s

0.1 25 2032 959 1690 798 1246 588

0.2 50 1952 921 1650 779 1250 590

_. _" 0.3 75 1874 884 1601 756 1226 579

o8-

_ 0.4 100 1785 842 1533 723 1187 560

c 0.5 125 1688 797 1462 690

_ 0.6 149 1593 752 1381 652

LLI

0.7 174 1482 699 1287 607

0.8 199 1360 642 1182 558

0.9 224 1231 581
1 249 iiiiiiiiiiiiii!ii_i_iiiiiiiiiiiiiili!iiiiiiiiiii_ii!_i!_i_i;i;i;iiiiiiiiiiiiiiiii;!_ii_iiiiiiiiiiiiiiiii iiiiiiiiiiiii_i_i_!ii!ii!ii!iiii!iliiiiiiiiiii_!iiiiiiiiiiiii

*9MPXIOOL20 (1)(2) * Denotes Brand

Rnd__ee_ HI MED H MED L LO

Tap

in wc Pa CFM L/s CFM Us CFM L/s CFM L/s

0.1 25 2240 1057 2137 1008 1993 941 1820 859

0.2 50 2163 1021 2062 973 1934 913 1768 834

_" 0.3 75 2083 983 1992 940 1872 883 1722 813

o8-

_ 0.4 100 2002 945 1916 904 1801 850 1656 782

_ 0.5 125 1912 902 1833 865 1723 813 1590 750

_ 0.6 149 1821 859 1745 824 1636 772 1513 714

0.7 174 1727 815 1654 781 1547 730

w

0.8 199 1618 764 1551 732

0.9 224 1502 709
1 249 iiiiiiii;_i!ii;ii_!_i!i_ii!i:!i!i!iiiiiiiiiiii_ii;ii;ii;ii;ii;ii;ii;ii;iiiliiiiiiiiii;_i!iiiiii_i!_ilililil;!iiiiiiiii_iiiiii_!i_ii!ii!ii!ii!iiiiiiiii_!_i!ii!ii!ii!ii!iiiiiiiiii;ii!ii!i_!_i!ii!ii:ii!iiiiiiiiiii_i_:!i:!i:!i:!i:!i:!i!!i

MAX CFM'sfor Factory Washable Filters

Filter Size (in/mm) CFM Ws

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" X 25"/610 x 635 2500 1180

Max CFM based on 600 FPM (3.0 m/s)

NOTE: Dis _osable 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 Motor - A Dimension

E

....

44001 105103 Specifications are subject to change without notice. 49

Model

*9M PX

inches mm

060 F 12 13/8 35.1

080J 12 17/8 46

080J20 17/8 46

100L20 15/8 41.9

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

* = 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 the serial 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 X 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=1600CFM

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

50 Specifications are subject to change without notice. 44001 105103