ICP H9MPT100J16C1, H9MVX080J20A1, H9MVX100L20A1, T9MVX060F12A1 Installation Guide

90+ GAS FURNACE DIRECT OR NON-DIRECT VENT

Category IV Furnace

*9aPT Two-Stage Heating & Supports
*9MPV 92% Variable Speed, Two-Stage Heating & Supports

Two-Stage Cooling Units

*9MVX 95% Variable Speed, Two-Stage Heating & Supports

Two-Stage Cooling Units

* Denotes Brands (C, H, T)

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.

INSTALLER: Affix these instructions

on or adjacent to the furnace.

Before puchasiag this appl{ance,
read important energy cost end

efficiency information available
from your retaJle£

International Comfort Products, LLC

Lewisburg, TN 37091 USA

1. Safe Installation Requirements .................. 5

2. Installation ................................. 6

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

4.Vent & Combustion Air Piping ................... 14

5. Concentric Vent Termination .................... 31

6. Gas Supply and Piping ........................ 34

7. Electrical Wiring ............................. 39

Table of Contents

8. DuctworkandFilter ......................... 41

9. ChecksandAdjustments ..................... 44

10. FurnaceMaintenance........................ 48

11. SequenceofOperation&Diagnostics*9MPT...... 49

12. WiringDiagram*9MPT ....................... 51

13. SequenceofOperation& Diagnostics*9MPV,*9MVX 52

14. WiringDiagram*9MPV,*9MVX ................. 54

CONSUMER: Retain these
instructions for future reference.

15. ThermostatWiringGuide ..................... 55

ELECTRIC SHOCK HAZARD
Failure to follow this warning

could result in personal injury
and/or death.

Turn Off All Power Before
Servicing.

CARBON MONOXIDE POISONING AND FIRE
HAZARD

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

age.
This furnace is not designed for use in mobile

homes, trailers or recreational vehicles.

Portions of the text and tables are reprinted from NFPA 54 / ANSi Z223,1-2006(c_, 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.

Specifications aresubject to change without notice. 44001 202401 Feb 2009

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) 1through 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 202401 Specificationsare subject to changewithoutnotice. 2

START-UP CHECK SHEET

For PSC Models *9MPT

(This sheet is optional. Keep 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.

All Electrical Connections Tight? [U

Have hoses been relocated for furnace U/D/H
application? [U

Condensate Drain Connected? [U

Condensate Drain Trapped? [U

Calculated Input (BTU) Rate: (See Checks

Adjustments Section).

Heating Check
Measured Line Pressure During High Heat:

Measured Manifold Pressure: High Heat

Low Heat

Temperature of Supply Air: High Heat

Low Heat

Temperature of Return Air:
Temperature Rise (Supply - Return)' High Heat __

Low Heat

In Rise Range (see furnace rating plate)?

Static Pressure (Ducts) High Heat:

The Blower Speed Tap used for:

Optional Check:

Cooling Check

Temperature of Supply Air:
Temperature of Return Air:

Temperature Difference:

Supply
Return

High Heat
Low Heat

CO?
CO2?

and

Manual Gas Shut-off Upstream of Furnace/Drip Leg [U

Gas Valve turned ON?

Type of Gas: Natural: [U

Filter Type and Size:
Shade in Heating Fan "Time OFF" Setting and Thermostat

Type setting:

3 Specifications are subject to change without notice, 44001 202401

Propane: [U

Static Pressure (Ducts) Cooling:

The Blower Speed Tap used for:

Dealer Comments:

Supply
Return

Cooling

START-UP CHECK SHEET

For Variable Speed Models *9MPV, *9MVX

(This sheet is optional. Keep 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 Input (BTU) Rate: (See Checks and

Adjustments Section).

Heating Check
Measured Line Pressure During High Heat:

Measured Manifold Pressure: High Heat

Low Heat

Temperature of Supply Air:

Temperature of Return Air:
Temperature Rise (Supply - Return)' High Heat __

In Rise Range (see furnace rating plate)?

Static Pressure (Ducts) High Heat: Supply

High Heat
Low Heat

Low Heat

Return

All Electrical Connections Tight? Lj

Have hoses been relocated for furnace U/D/H
application? Lj

Condensate Drain Connected? Lj

Condensate Drain Trapped? Lj

Manual Gas Shut-off Upstream of Furnace/Drip Leg Lj

Gas Valve turned ON?

Type of Gas: Natural: Lj Propane: Lj

Filter Type and Size:
Shade in Final Furnace Settings Below:

123 ] 2345 678

J2

Optional Check:

Cooling Check

Temperature of Supply Air:
Temperature of Return Air:

Temperature Difference:

Static Pressure (Ducts) Cooling:

Dealer Comments:

CO?
CO2?

Supply
Return

lu o o nI ,11 I-_ AC/HPEfficiencySLOWER ADJUST HP Comfort

HP mode

select

44001 202401 Specificationsare subject to changewithoutnotice. 4

1. Safe Installation Requirements

FIRE, EXPLOSION, AND CARBON MONOXIDE
POISONING HAZARD

Improper adjustment, alteration, service,
maintenance or installation could cause personal

injury, death and/or property damage.
Installation or repairs made by unqualified persons

could result in hazards to you and others.
Installation MUST conform with local codes or, in

the absence of local codes, with codes of all

governmental authorities having jurisdiction.

The information contained in this manual is

intended for use by a qualified service agency that
is experienced in such work, is familiar with all

precautions and safety procedures required in
such work, and is equipped with the proper tools

and test instruments.

NOTE: This furnace is design-certified by the CSA International

(formerly AGA and CGA) for installation inthe 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 infailure 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 "Combustion and Ventilation Air, Horizontal

Venting and Masonry Chimney Venting" 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 Gas Piping

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.

• 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

Requirements" 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.

Safety Rules

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

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

create hazards for you, the owner.

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

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

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

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

gas produced when fuel is not burned completely or when the
flame does not receive sufficient oxygen.

Therefore, to help alert people of potentially dangerous carbon
monoxide levels, you should have a commercially available

carbon monoxide alarm that is listed by a nationally
recognized testing agency in accordance with Underwriters
Laboratories Inc. Standard for Single and Multiple Station

Carbon Monoxide Alarms, ANSI/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 serious bodily injury,
death, and/or property damage. Therefore, in order to alert

people of potentially dangerous fire or smoke, you should have
fire extinguisher and smoke alarms listed by Underwriters
Laboratories installed and maintained in the building or
dwelling (see Note below).

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

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

C.

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

do the following:

1.

Thoroughly read this manual and labels on the unit. This

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

2.

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

Immediately call a qualified service technician to inspect the
unit and to replace any part of the control system and any gas

control which has been under water.

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

44001 202401 Specificationsare subject to changewithoutnotice. 5

FrozenWaterPipeHazard

WATER DAMAGE TO PROPERTY HAZARD

Failure to protect against the risk of freezing may
result in property damage,

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

supply and draining water pipes or otherwise

protecting against the risk of frozen pipes and
resultant damage.

Your furnace is designed solely to provide a safe and comfortable

living environment. The furnace is NOT designed to ensure that
water pipes will not freeze. It is equipped with several safety
devices that are designed to turn the furnace off and prevent it from
restarting in the event of various potentially unsafe conditions.

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

Ifthe structure will be unattended during cold weather you should

take these precautions.

1. Turn off the water supply to the structure and drain the water
lines if possible and add an antifreeze for potable water to
drain traps and toilet tanks. Open faucets in appropriate

areas.

-or-

2.

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

-or-

3.

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

WinterShutdown

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

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

2. Disconnect the 3/4" (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.

2. 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 be installed in an upflow, horizontal (either left or

right) or downflow airflow position. DO NOT install this furnace on
its back. For the upflow position, the return air ductwork can be

attached to either the left or right side panel and/or the bottom. For
horizontal and downflow positions, the return air ductwork must be

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

Location and Clearances

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).

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

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

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

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

evaluation and remedy.

FROZEN AND BURST WATER PIPE HAZARD
Failure to 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 changewithout notice. 440012024 01

Typical Upflow Installation

Aluminumornon-rustingshieldrecommended.

*8.......... (SeeVentTerminationShieldingfordimensions)

tzu_ zmm]M n _ '

20' t6imi Max....................................................................................................................................................................;,\ / Couplingonendsof

\ " J " _ i,_ / _' exhaustppe Tota

in same ,,

atmospheric ...._ (not usedon

zone I_i. . . / side structure = 8"

VentPipesMUSTbe
supported

Horizontallyand

Vertically

J._ InletPipe pipe&couplingout-

SinglePipe (203.2mm)

%

_" model) /

"8" i203.2mm)Min.
20' (6.1m)Max.

insameatmosphericzone

* Increaseminimumfrom8"(203.2mm)to18"(203.2mm)forcoldclimates(sus-
tainedtemperatures0°F(-17° C)andbelowfor24ormoreconsecutivehours).

25-23-33

Typical Downflow Installation

SeeVentTermination
ShieldinginVentSection.

\

\ .restrainvent

InletPipe ,Y?]_ ] "8"(20&2mm)Min. \, xx

(not usedon_ i 20' (6.1m) Max. in \, //
Single Pipe i_i>_,!_ same atmosphericzone / '

model)

ii"

VentPipesMUST i _ ;i
besupportedHorizon-i

tally and Vertically i i_ i i

z_i

Coupling on inside
andoutsideofwallto

pipe

8" Min.

"8" (203.2mm)Min
20';:(6.1m)Max.

in same

/?ospheric zone

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 iscontrolled by a thermostat. It may not be "hot

wired" to provide heat continuously to the structure without

thermostatic control.

• Clean outside air is provided for combustion. This is to

minimize the corrosive effects of adhesives, sealers and
other construction materials. It also prevents the

entrainment of drywall dust into combustion air, which can
cause fouling and plugging of furnace components.

• The temperature of the return air to the furnace is

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

the structure is under construction is deemed to be

intermittent operation per our installation instructions.

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

rating plate value.

• The filters used to clean the circulating air during the

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

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

HVAC system components after construction is completed.

• After construction is complete, verify furnace operating

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

:;Discharge i

_r y

* Increaseminimumfrom8"(203.2mm)to18"(203.2mm)forcoldclimates(sus-
tainedtemperatures0°F(-17°C)andbelowfor24ormoreconsecutivehours).

25-23-33a

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.

44001 202401 Specificationsare subject to changewithoutnotice. 7

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 ofthe furnace for agiven application will dictate the

position ofthe 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 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 -

IPEX System 636, PVC/CPVC Primer, Purple Violet for Flue
Gas Venting and IPEX System 636(1)TM,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.

Consignes sp6ciales pour rinstallation de ventillation au
Canada

L'installation 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 $636. 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 IPEX PVC qui

sont certifiees & ce standard. Au Canada I'appr_t et le ciment

doivent _tre du m_me manufacturier que le syst_me de
ventillation - IPEX Systeme 636, Appr_t PVC/CPVC. Mauve
Violette pour conduit en evacuation des gaz et IPEX Systeme

636(1)TM,ciment pour PVC pour conduit en evacuation des gaz,

6val'u_ CLASSE IIA, 65 deg. C. doit _tre utilise avec ce

systeeme d'evacuation - ne pas melanger I'appr_t et le ciment

d'un manufacturier avec le syst_me de ventillation d'un autre

manufacturier. Bien suivre les indications du manufacturier Iors

de I'utilisation de I'appr_t et du ciment et ne pas utiliser ceux-ci

si la date d'expiration est atteinte.

L'operation securitaire, tel que definit par ULC $636, 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.

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

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

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

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

utility room (See Figure 3). Do not install furnace on itsback 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 ironframe 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.

Ifthe furnace is to be installedin 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 installeddirectly 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 changewithout notice. 440012024 01

Dimensions and Clearances

.........F i.........

.................................................................................i i i .......A,R,NT KE

TOP ...................................I

a

LEFTSIDE +8611116,i ELECTRICAL

TRAP(COU.TE+LO ...............................

A R NTAKE(KO) S _ .................i..............................i / (347'7)

(ALTERNATE) .... 4Y£i16 _J! i . i i +,;_ 11/1L

TRAP(KO) (122.2) ' +; b _ !3::P) i '%_

UPFLOW/HORIZONTAL.... _+ +" +' t'_!8 + t_297 '

...... THERMOSTAT f" i ..........7 .......i 28314 i

21/_ _ 177,8 i (730.3) :

i J 611.2)

13114 i i (439 7) i (603.2)

(336.6) ; i 111/1 i

+; .................+++ ++ _ i+ :

, , 21618 ++ 47/8., +

t7/8 | (849,3)24 (12331i

(47,6) (609,6)

D _i

Capacity

*RMPT050F12

*RMPT075F14

*9MPT100J16

*RMPT125L20

*9MPV050F12

*9MPV075F12

*RMPVl00J20

*RMPV125L20

*9MVX040F12

*9MVX060F12

*RMVX080J20

*RMVX100L20

* Denotes Brand

j (KO) 42,9 t

Unit

A B c D

19t/8 175/8 2t/8 143/4

(485.8} (477.7) (54) (374,7)

191/8 17518 21/8 143/4

(485.8) (477.7) (54) (374,7)

223/4 21114 115/16 18314

(577.9) (539.8) (49.2) (476,3)

241/2 23 7/16 23

(522.3) (584.2) (11.1) (584,2)

191/8 17518 21/8 14314

(485.8) (447.7) (54) (374,7)

191/8 17518 21/8 143/4

(485.8) (447.7) (54) (374,7)

223/4 21114 115/16 18314

(577.9) (539.8) (49.2) (476,3)

241/2 23 7/16 23

(522.3) (584.2) (11.1) (584,2)

191/8 17518 21/8 14314

(485.8) (447.7) (54) (374,7)

191/8 17518 21/8 143/4

(485.8) (447.7) (54) (374,7)

223/4 21114 115/16 18314

(577.9) (539.8) (49.2) (476,3)

241/2 23 7/16 23

(522.3) (584.2) (11.1) (584,2)

• i

[ ii775) i 11

-_L__,_ '_/

GAS ........................i ::

VENT............. \/:' i / 1_11/

+ i i lS

i /!4 Vt6t _
i 17=/6 i 1913116

Drawing is representative,
but some models may vary

ALL DIMENSIONS: in (mm)

Cabinet Bottom

E F G H

43/8 4112 21/2 9112

(tt1,1) (tt4.3) (6&5) (241.3)

4318 4112 21/2 9112

(tt1,1) (tt4.3) (6&5) (241.3)

43/8 4t12 25/8 113/8

(tt1,1) (tt4.3) (56,7) (288.9)

43/8 4t/2 21/4 12114

(tt1,1) (tt4.3) (57,2) (311.2)

43/8 4t/2 21/2 9t/2

(tt1,1) (tt4.3) (5&5) (241.3)

43/8 4t/2 21/2 9t/2

(tt1,1) (tt4.3) (5&5) (241.3)

43/8 4t/2 25/8 113/8

(tt1,1) (tt4.3) (56,7) (288.9)

43/8 4t/2 21/4 12114

(tt1,1) (tt4.3) (57,2) (311.2)

43/8 4t/2 21/2 9t/2

(tt1,1) (tt4.3) (5&5) (241.3)

43/8 4t/2 21/2 9t/2

(tt1,1) (tt4.3) (5&5) (241.3)

43/8 4t/2 25/8 113/8

(tt1,1) (tt4.3) (56,7) (288.9)

43/8 4t/2 21/4 12114

(tt1,1) (tt4.3) (57.2) (311.2)

- A +=i

B

FRONT

Top

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

ALL SIDES Of SUPPLY PLENUM

SIDES
VENT
TOP OF FURNACE

"24" (609.6)
1" (25.4)

0
0

1" (25.4)

"30" (762mm)clearancerecommendedforfurnaceremoval.

Horizontalposition:Linecontactis permissibleonlybetween
linesformedbyintersectionsoftopandtwo sidesoffurnace

jacket,andbuildingjoists,studsorframing.

NOTE: Evaporator "A" coil drain pan dimensions may
vary from furnace duct opening size. Always consult

evaporator specifications for duct size requirements.
Furnace is designed for bottom return or side return.
Return air through back of furnace is NOT allowed.

181/2

(469,9)

/

GAS (KO)\

413116

/ RIGHT SIDE

/

/ TRAP(KO)

//_(COUNTERFLOW)

ELECTRICAL(KO)

AIRINTAKE (KO)
(ALTERNATE)

VENT (KO)

TRAP (KO)

UPFLOW/HORIZONTAL

21/41

THERMOSTAT(57.2)........................

13114

(336,6)

(609.6)

17/8
(47.6)

25-23-36b

44001 202401 Specificationsare subject to changewithoutnotice. 9

KnockOuts Hammer and Screwdriver Used

for Knockout

CUT HAZARD
Failure to follow this caution may result in

personal injury.
Sheet metal parts may have sharp edges or burrs.

Use care and wear appropriate clothing, safety
glasses and gloves when handling parts and

servicing furnaces.

Use a hammer and screwdriver to strike a sharp blow (see
Figure 5) directly to the knockout tie points or use a hammer inthe

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

25-40-06

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

3. Combustion & Ventilation Air

For Single Pipe Installation
(Non-Direct Vent)

CARBON MONOXIDE POISONING HAZARD
Failure to provide adequate combustion and

ventilation air could result in personal injury or

death.
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 National Fuel Gas Code, NFPA54/ANSI Z223.1, 2006 (or
current edition) and applicable provisions of local building codes.

Note: The Combustion & Ventilation Air Section inthis 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, National Fuel Gas Code (NFGC),

ANSI Z223.1-2006/NFPA 54-2006 in the U.S.,

2. Sections 8.2, 8.3, 8.5, 8.6, 8.7, and 8.8 of National Standard of
Canada, Natural Gas and Propane Installation Code
(NSCNGPIC), CSA B149.1-05 in Canada,

3. Applicable provisions of the local building code.

This furnace can NOT be common vented or connected to any type

B, BW or L vent or vent connector, nor to any portion of a

factory-built or masonry chimney. Multistory venting is NOT

permitted. If this furnace isreplacing a previously common-vented

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

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

section. This furnace MUST be vented to the outside.

When the installation is complete, check that all appliances have

adequate combustion air and are venting properly. See Venting

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

manual.

OutdoorCombustionAir Method

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

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

AirOpeningsand Connecting Ducts

1. Total input rating for all non direct vent gas appliances
MUST be considered when determining free area of
openings.

2. Connect ducts or openings directly to outside.

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

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

5. When sizing grille or louver, 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.

Confined SpaceInstallation

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 inthe area.

Requirements

1. Provide confined space with sufficient air for proper
combustion and ventilation of flue gases using horizontal or
vertical ducts or openings.

2. Figure6 illustrate how to provide combustion and
ventilation air. A minimum of two permanent openings, one
inlet and one outlet, are required.

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).

10 Specificationsare subject to changewithoutnotice. 440012024 01

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

ThisinstallationNOTapprovedinCanada

Ga Ven

.__Gable Vent

fVentilated Attic_

/

f

Z

i

Air (1)

AlternateInletAir (1)

3•

One opening MUST be within 12" (304.8mm) of the floor
and the second opening within 12" (304.8mm) of the ceiling•

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. Size openings and ducts per Table 1.
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

_rnacl

OutletAir(1)

GasVent

........

Air

ou:

SoffitVent

MinimumOneInlet and One OutletAirSupply is Required
May be in anyCombinationShown

InletAir Opening MustbeWithin12"(304.8mm)of floor

Inlet

OutletAir Opening MustbeWithin12"(304.8mm)of ceiling

Air (2)

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

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 1 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.

5•

Horizontal duct openings require 1 square inch of free area
per 2,000 BTUH of combined input for all gas appliances in
area (see Table 1).

6•

Vertical duct openings or openings directly to outside
require 1 square inch of free area per 4,000 BTUH (5.5
cm2/kW) for combined input of all gas appliances in area
(see Table 1).

Free Area

MinimumFreeAreaRequiredfor EachOpeningorDucttoOutdoors

BTUH(kW) TwoHorizontalDucts SingleOpening TwoVerticalDuctsorOpenings RoundDuct

InputRating BTUH(kW) BTUH(kW) BTUH(kW) BTUH(kW)

40,000(11.72) 20sq.in.(129cm2) 13.34sq.in.(86cm2) 10sq.in.(65cm2) 4" (101.6mm)
50,000(14.65) 25sq.in.(161cm2) 16.7sq.in.(108cm2) 12.5sq.in.(81cm2) 4" (101.6mm)

60,000(17.58) 30sq.in.(194cm2) 20sq.in.(129cm2) 15sq.in.(97cm2) 5" (127mm)
75,000(21.98) 37.5sq.in.(242cm2) 25sq.in.(161cm2) 18.75sq.in.(121cm2) 5" (127mm)

80,000(23.45) 40sq.in.(258cm2) 26.7sq.in.(172cm2) 20sq.in.(129cm2) 5" (127mm)

100,000(29.31) 50sq.in.(322cm2) 33.3sq.in.(215cm2) 25sq.in.(161cm2) 6"(152.4mm)
125,000(36.63) 62.50sq.in.(403cm2) 41.7sq.in.(269cm2) 31.25sq.in.(202cm2) 7" (177.8mm)

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 cm2Vertical

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 cm2Horizontal

44001202401 Specifications are subject to changewithout notice. 11

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)

IndoorCombustionAir (UnconfinedSpace)

Standardand Known-Air-Infiltration Rate Methods

© NFPA & AGA
Indoor air is permitted for combustion and ventilation, if the

Standard or Known-Air-Infiltration Rate Method is used.

CARBON MONOXIDE POISONING HAZARD
Failure to supply adequate combustion air could

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

outdoors for combustion and ventilation. A space
with at least 50 cubic feet per 1,000 BTUH (4.8 cubic
meters per kW) input rating or homes with tight
construction may need outdoor air, supplied

through ducts, to supplement air infiltration for

proper combustion and ventilation of flue gases.

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) ofthe maximum input ratings for atl gas appliances installed in

the space. The 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 isknown to be less than 0.40 air changes per hour
(ACH) and equal to or greater than 0.10 ACH. Infiltration rates

greater than 0.60 ACH shall not be used. The minimum required

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

determined per Table 2 or Equations 1 and 2. Determine the
minimum required volume for each appliance in the space, and
add the volumes together to get the total minimum required

volume for the space.

CARBON MONOXIDE POISONING HAZARD
Failure to supply additional air by means of

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.

The Known Air Infiltration Rate Method shall be used if the

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

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

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

add the volumes together to get the total minimum required

volume for the space.

CARBON MONOXIDE POISONING HAZARD.
Failure to supply additional air by means of

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.

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

OtherThanFan-AssistedTotal Fan-assistedTotal

30,000BTU

ACH

0,60 1,050 (29,7) 1,400 (39,2) 1,750 (49) 1,875 (52,5) 2,500 (70) 3,125 (87,5)
0,50 1,260 (35,3) 1,680 (47,04) 2,100 (58,8) 2,250 (63) 3,000 (84) 3,750 (105)
0,40 1,575 (44,1) 2,100 (58,8) 2,625 (73,5) 2,813 (78,8) 3,750 (105) 4,688 (131,3)

0,30 2,100 (58,8) 2,800 (78,4) 3,500 (98) 3,750 (105) 5,000 (140) 6,250 (175)
0,20 3,150 (88,2) 4,200 (117,6) 5,250 (147) 5,625 (157,5) 7,500 (210) 9,375 (262,5)
0,10 6,300 (176,4) 8,400 (235,2) 10,500 (294) 11,250 (315) 15,000 (420) 18,750 (525)

0,00 NP NP NP NP NP NP

ACH = Air Changes per Hour

NP = Not Permitted
Table 2 Minimum Space Volumes were determined by using the
following equations from the National Fuel Gas Code ANSI

Z223.1/N FPA 54-2006, 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:

RequiredVolume other _ 59 m3 _ |other )

(8,790kW)

-- ACH 1000 BTUH

-- ACH .293 kW

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

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

50,000BTU
(14,650kW)

ft3(m 3)

1,250(35)
1,500(42)

1,875(52,5)

2,500(70)
3,750(105)
7,500(210)

NP

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

RequiredVolume fan_ 15ft3 ( .fan )

ACH 1000 BTU H

! \

! \

RequiredVolume fan _ .42 m3 _, [ fan )

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)

ACH .293 kW

12 Specificationsare subject to changewithoutnotice. 440012024 01

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 closable doors between rooms.

• An attic or crawl space may be considered a space that freely
communicates with the outdoors provided there are adequate

ventilation openings directly to outdoors. Openings MUST

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

Ventilation openings to outdoors MUST be at least 1 square

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

• Combining spaces on the same floor level. Each opening
shall have a free area of at least 1 in2/1,000 BTUH
(22cm2/kW) of the total input rating of all gas appliances in the
space, but not less than 100 in2 (645 cm2). One opening shall
commence within 12" (304.8 mm) of the top and one opening
shall commence within 12" (304.8mm) of the bottom of the
enclosure. The minimum dimension of air openings shall be at

least 3" (76.2 mm).

• Combining spaces on different floor levels. The volumes of
spaces on different floor levels shall be considered
communicating spaces if connected by one or more
permanent openings in doors or floors having a free area ofat
least 2 in2/1,000 Btuh (44 cm2/kW) of total input rating of all
gas appliances.

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

ventilation and dilution of flue gases. However, in buildings

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

Outdoor Combustion Air Method:

• Unusually tight construction is defined as Construction with

1. Walls and ceilings exposed to the outdoors have a

continuous, sealed vapor barrier. Openings are
gasketed or sealed and

2. Doors and openable windows are weather stripped and

3. Other openings are caulked or sealed. These include

joints around window and door frames, between sole

plates and floors, between wall-ceiling joints, between
wall panels, at penetrations for plumbing, electrical and
gas lines, etc.

VentilationAir

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

temperature across the heat exchanger MUST not fall below 60°

so that flue gases will not condense excessively in the heat
exchanger. Excessive condensation will shorten the life of the heat
exchanger and possibly void your warranty.

VentingandCombustionAir Check

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 inthe vent and the leakage or spillage of vent gases.

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

MAKE THE FOLLOWING CHECK.

Vent Check

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

Vent Pipe----_ sDraft Hood

Typical Gas f "_
Water Heater [ _ _ j____ Match

I I v

I I

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.

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 Pro-
pane Installation Code and these instructions. Determine

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

dition.

3. As far as practical, close all building doors and windows

and all doors between the space inwhich 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 operat-
ing at maximum speed. Do not operate a summer exhaust

fan.

6. Followthe lighting instructions. Place the appliance being
inspected into operation. Adjust the thermostat so ap-

pliance is operating continuously.

7. Test for spillage from draft hood equipped appliances at

the draft hood relief opening after 5 minutes of main burn-

er operation. Use the flame of a match or candle.
(Figure 7)

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

tests, the venting system must be corrected in accor-

dance 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 con-
nected to the venting system properly vents when tested

as outlined above, return doors, windows, exhaust fans,
fireplace dampers and any other gas-fired burning ap-

pliance to their previous conditions of use.

44001 202401 Specificationsare eubject to changewithout notice. 13

For Two Pipe Installation

(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.

4. Vent and Combustion Air Piping

CARBON MONOXIDE POISONING HAZARD
Failure to properly vent this furnace could result in

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

and ventilation air.

DualCertified(*SMPT,*SMPV,*SMVXModels)
Director Non-DirectVent

This furnace iscertified as a Category IV furnace. 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 CombustionAir PipingGuidelines

This furnace is approved for venting with Schedule 40 PVC, CPVC,
ABS fittings, and Cellular Core and SDR-26 PVC pipe.

Materials Pipe Pipe Core Fittings Primer Cement

ABS to

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

conform to applicable CSA standards or to local codes having
jurisdiction.

with the specific venting material.

solvent cement that meets the requirements of ASTM D3138.

use for cementing plastic pipe and fittings.

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

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

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

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

codes of country having jurisdiction.

ApplicableASTM Standardsfor Vent Materials

Sch.40 SDR Solv.

ABS D1527 F628 & -- D2235

PVC D1785 D224t F891 & F656 D2564

CPVC F44t F442 -- F438 -- F493

PVC

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 asto 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

.......... D3138

2) Only use solvent cements that are marked for use

3) ABS to PVC transition joints REQUIRE a special

4) Refer to ASTM D2855 for general procedure to

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" (6.4mm) per foot

(304.8mm) of run is required to properly return condensate

to the furnace drain system.

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

Cell

Pipe

D2468
D2661

D2466
D2665

14 Specificationsare subject to changewithoutnotice. 440012024 01

10. All horizontal pipe runs MUST be supported at least
every five feet with galvanized strap or other rust
resistant material. NO sags or dips are permitted.

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

12. The maximum pipe length is 40' (12.2m) total in the inlet or
outlet side of the system. Up to five, 90 ° elbows can be used

on the inlet or the outlet. With the Concentric Vent

Termination Kits (NAHA001CV or NAHA002CV), the

maximum pipe length is 35' (10.7m) with four 90° elbows. If
more elbows are required, reduce the length of both the inlet
and exhaust pipes 5' (1.5m) for each additional elbow used.

(See Table 3 or Table 4).

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

14. 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 avent 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).

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

16. 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 ONLYthe piping
protrudes.

• The termination clearances shown in Figure8 are
maintained.

17. 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.

CombustionAirandVent PipingInsulation
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.

SizingCombustionAir andVent Pipe

Consult Table 3 or Table 4 to select the proper diameter exhaust
and combustion air piping. Exhaust and combustion air piping is
sized for each furnace Btuh size based on total lineal vent length
(on inlet or outlet side), and number of 90°elbows required.

1. Double Pipe Installation-If installing as a direct-vent
appliance, consult Table 4 to select the proper diameter
exhaust and combustion air piping. Exhaust and
combustion air piping is sized for each furnace Btuh size
based on total lineal vent length (on inlet or outlet side), and
number of 90° elbows required.

2. Single Pipe Installation-If installing as a non-direct vent
appliance, (single outlet pipe and no inlet pipe) refer to

Table 3. The table shows the maximum number of elbows

allowed with any given pipe diameter and length of run.

3. Use of Elbows-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.

Pipe Diameter Table

Single Piping ONLY

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

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

80,000 & 100,000 Btuh Furnace

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

125,000 Btuh Furnace

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

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

DWV Long Radius Type for 2" (50.Smm) and 3" (76.2mm)

vents.

If more than five elbows are required, reduce the length of both
the inlet and exhaust pipes 5' (1.5m) for each additional elbow
used. If less than five elbow are required, the length can be
INCREASED by 5' (1.5m) for each additional elbow NOT used.

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

Pipe Diameter Table

Dual Piping ONLY

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

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

80,000 & 100,000 Btuh Furnace

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

125,000 Btuh Furnace

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

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

DWV Long Radius Type for 2" (50.Smm) and 3" (76.2mm)

vents.

If more than five elbows are required, reduce the length of both
the inlet and exhaust pipes 5' (1.5m) for each additional elbow
used. If less than five elbow are required, the length can be
INCREASED by 5' (1.5m) for each additional elbow NOT used.

* Feet of pipe is whichever pipe run is the longest, either inlet
or outlet side.

For venting table, see"Concentric Termination Kit" in

this manual.

Vent Termination Clearances

CARBON MONOXIDE POISONING HAZARD

Failure to properly vent this furnace could result in

death and/or personal injury.
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 30.

For "Concentric Termination Kit" clearances, see Figure 32,
Figure 33, Figure 34, Figure 35 and Figure 36 in this manual.

2. This furnace is Dual Certified and can be installed as a
single pipe appliance (all combustion from inside the
structure) or as a direct vent appliance where all

combustion air istaken from outside the structure.

3. For Single Pipe installation refer to Figure 9 for vent
termination clearances.

4. For Direct Vent installation, refer to Figure 8 for vent
termination.

44001 202401 Specificationsare subject to changewithoutnotice. 1 5

Figure 8 Direct Vent Termination Clearance

D VENTTERMINAL

Item Clearance Description Canadian Inslallafion (1) U.S. Installation (2)

A Clearance above grade, veranda, porch, deck, balcony, or 12 inches(30 cm) # 12 inches (30 cm)

anticipated snow level

B Clearance to a window or door that may be opened 12 inches (30 cm) for appliances > 10,000 Btuh (3 kW) 9 inches (23 era) for appliances > 1O,0O0 Btuh (3kW) and s

C Clearance to a permanently closed window

D Vertical clearance to a ventilated soffit located above [he

terminal within a horizontal distance of 2 feet(61em) from the
centerline of the terminal

E Clearance to an unventilated soffit

F Clearance to an OL_side corner

G Clearance to an inside corner

H Clearance to each side of the centerline extended above 3 feet (91 cm) within 15 feet (4.5 m) above the meter/regulator 3 feet (9t cm) within 15 feet(4.5 m) above the

electrical meter or gas service regulator assembly assembly meter/regulator assembly

I Clearance to service regulator vent outlet 3 feet (91 cm)

J Clearance to non-mechanical air supply inlet to building or 12 inches (23 era) for appliances > 100,000 Btuh (3 kW) 9 inches (23 cm) for appliances > 10,000 Btuh (3kW) and

the combustion air inlet to any other appliance and s 100,000 Btuh (30 kW), 36 inches (30 cm) for _ 50,000 Btuh (15kW), 12 inches (30cm) for appliances

K Clearance to a mechanical air supply inlet 6 feet (1.83 m) 3 feet (91 cm) above if within 10 feet (3re)horizontally

L Clearance under a veranda, porch, deck, or balcony 12 inches(30 cm) +

M Clearance to each side of the centerline extended above or 12 inches (30 em) 12 inches (30 cm)

below vent terminal of the furnace to a dryer or water heater
vent, or other appliance's direct vent inlake or exhaust.

N Clearance to the vent terminal of a dryer vent, water heater 3 feet (91 cm) 3 feet (91 cm)

vent, or other appliances direct vent intake or exhaust.

Q Clearance from a plumbing vent stack 3 feet (91 cm) 3 feet (91 cm)

p Clearance above paved sidewalk or paved 7 feet (2.t 3m)**

driveway located on public property

(1.) In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code

(2.) In accordance with the cu trent ANSI Z223.1/NFPA 54, National Fuel Gas Code

# 18" (46 cm) above roof surface

+ Perrnitted only if veranda, porch, deck, or balcony is fully open on a mthimum of two sides beneath the floor.

For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B t49.1, clearances shall be in accordance with local inetallation codes and the requirements of the gas supplier and the
manufacturer's installation instructions

A vent shall not terminate above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.

Notes:

1,

The vent for this appliance shall not terminate

a. Over public walkways; or
b. Near soffit vents or crawl space vents or other areas where condensate or vapor could create a nusalnee or hazard or property damage; or

e. Where condensate vapor could cause damage or could be detrimental to the operation of regulators, relief valves, or other equipment.

2.

When locating vent terminations, consideration must be given to prevailing winds, location, and other conditionswhich may cause recirculation of the combustion products of adjacent vents.
Recirculation can cause poor combustion, inlet condensate problems, and accelerated corrosion of the heat exchangers.

3.

Avoid venting under a deck or large overhang. Recirculation could occur and cause performance or system problems.

\\\\x

16

_X_ AIR SUPPLY INLET

and s 100,000 Btuh(30 kW), 36 inches 50,000 Btuh 15kW), 12 inches (30cm) for appliances >

(91 cm) for appliances > 100,000 Btuh (30 kW) 50,000 Btuh (ISkW

appliances > 100,000 Btuh (3 kW) > 50,000 Btuh (15kW)

Specifications are eubject to change without notice.

E_ AREA WHERE TERMINAL IS NOT PERMITED

440012024 01

Other than Direct Vent Termination Clearance

D VENT TERMINAL \_ _X_ AIR SUPPLY INLET

Item Clearance Descriptions

A Clearance above grade, veranda, porch, deck, balcony, or

anticipated snow level

B Clearance to a window or door that may be opened

Canadian Installation (t)

12 inches (30cm) #

6 inches (15 cm) for appliances -< 10,000 Btuh (3 kW)
12 inches ( 30 cm) for appliances > 10,000 Btuh (3 kW0)
and -< 100,000 Btuh (30 kW), 36 inches (91 cm) for
appliances > 100,000 Btuh (30 kW)

E_ AREA WHERE TERMINAL IS NOT PERMITED

U.S. Installation (2)

12 inches (30 cm)

4 feet(1.2 m) below or to the side of the opening. 1foot(30 cm
above the opening.

C Clearance to a permanently closed window

D Vertical clearance to a ventilated soffit located above the

terminal within ahorizontal distance of 2"(61cm) from the
centerline of the terminal

E Clearance to an unventilated soffit

F Clearance to an outside corner

G Clearance to an inside corner

H Clearance to each side of the centerline extended above

electrical meter or gas service regulator assembly

I Clearance to service regulator vent outlet

J Clearance to non-mechanical air supply inlet to building or

the combustion air inlet to any other appliance

K

Clearance to a mechanical air supply inlet

L

Clearance under averanda, porch, deck, or balcony

M

Clearance to each side of the centerline extended above or
below vent terminal of the furnace to a dryer or water heater

vent, or other appliance's direct vent intake or exhaust.

N Clearance to the vent terminal of a dryer vent, water heater

vent, or ether appliances direct vent intake or exhaust.

O Clearance from a plumbing vent stack

p Clearance above paved sidewalk or paved 7 feel (2.13m)**

driveway located on public property

(1.) In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code

(2.) In accordance with the currant ANSI Z223.1/NFPA 54, National Fuel Gas Code
# 18'(46cm) above roof surface

3 feet (91 cm) within 15 feet(4.5 m) above the meter/regulator
assembly

3 feet (91 cm)

6 inches (15 cm) for appliances -< 10,000 Btuh (3 kW)
12 inches ( 30 cm) for appliances > 10,000 Btuh (3 kW0)

and -< 100,000 Btuh (30 kW)

36 inches (91 cm) for appliances > 100,000 Btuh (30 kW)

6 feet(1.83 m)

12 inches(30 am) +

3 feet (91 cm) Within 15feet (4.5 m) above the meter/regulatol
assembly

4 feet(1.2 m) below or to the side of opening: 1 foot (30 cm)
above opening.

3 feet(91 cm) above if within 10 feet (3 m horizontally)

7 feet (2.13m)

+ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.

For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B149.1, clearances shall be in accordance with local installationcodes and Ihe requirements of the gas supplier and the
Manufacturer's installation instructions.

** A vent shall not terminate above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.
Notes:

1. The vent for this appliance shall not terminate
a. Over publicwalkweys; or

b. Nears__itvents_rcraw_spacevents_r_therareaswherec_ndensate_rvap_rc_u_dcreateanusiance_rhazard_rpr_pertydamage;_r

c. Wherec_ndensatevap_rc_u_d_ausedamage_r_dbedetrimenta_t_t_e_perati_n_fregu_a_rs_re_iefva_ves_r_therequipment_

2. When locating vent terminations, consideration must be given to prevailing winds, location, and other c onditions which may cause recirculation of the cembustiob products of adjacent vents.
Recirculation can cause poor combustion, inlet condensate problems, and accelerated corrosion of the heat exchangers.

3 Avoid venting under a deck or large overhang. Recirculation could occur end cause performance or system problems. A05013

44001 202401 Specificationsare eubject to changewithout 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 factory installed internally

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 will 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 of

water into 1/2" (12.7mm) ID drain hose. Water will flow through the

drain hose and into the condensate drain trap. This will prime both
the vent and the transition sides of the trap. Reconnect the 1/2"

(12.7mm) ID drain hose to the original component, either the gutter

or the PVC tee trap.
The condensate drain trap supplied with the furnace MUST be

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

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

minimum inner diameter (I.D.) of 5/8"(15.gmm) may also be used,

as allowed by local codes. Alternate drain pipes and hoses may be

used as allowed by local codes.
The drain line must maintain a 1/4" (6.4mm) per foot (304.8mm)

downward slope toward the drain. 1/4" (6.4mm) per foot (304.8mm)

is recommended. Installation of an overflow line is recommended

when the 1/4"(6.4mm) per foot (304.8mm) slope tothe 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_ _ !'i'111Drain Tube Clip Location

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

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

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

the condensate and possible property damage.

1. A condensate sump pump MUST be used if required by
local codes, or if no indoor floor drain is available. The
condensate pump must be approved for use with acidic

condensate.

2.

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

ONLY.

3.

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

PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in burst

water pipes and/or 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.

CondensateDrainTrap FreezeProtection

Special precautions MUST be made if installing furnace in an area
which may drop below freezing. This can cause improper
operation or damage to the equipment. If the the furnace
environment has the potential of freezing, the drain trap and drain
line must be protected. Use 3 to 6 watt per foot at 115 volt, 40 ° F
(4°0) 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. Prime the

trap before furnace operation.

Drain Tube

Blower
Shelf Door

Representative drawing only, some models may vary in appearance.

18 Specifications are eubject to changewithoutnotice. 440012024 01

f

Switch