International comfort products C9MVX, H9MPV, C9MPV, T9MPV, C9MPT Installation Instructions Manual

...

INSTALLATION INSTRUCTIONS

90+ Two−Stage & Two−Stage, Variable

Category IV, Gas Furnace

C9MVX, H9MVX, T9MVX, C9MPV, H9MPV,

(Upflow/Downflow/Horizontal)

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

T9MPV, C9MPT, H9MPT, T9MPT

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:

WARNING

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

CAUTION

Signal Words on Product Labeling

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

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 Sheets 3.................................

Safety considerations 5...................................

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

Installation 7...........................................

Combustion & Ventilation Air 11..............................

Vent and Combustion Air Piping 15............................

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

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

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

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

Checks and Adjustments 43.................................

Furnace Maintenance 46...................................

Sequence of Operation & Diagnostics (*9MPT) 47.................

Wiring Diagram *9MPT (Two-Stage Heating with PSC Motor) 49.......

Sequence of Operation & Diagnostics (*9MPV, *9MVX) 50...........

Wiring Diagram *9MPV, *9MVX (Variable Speed Blower Motor) 52......

Thermostat Wiring Guide 53.................................

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.

Specifications are subject to change without notice.

PERSONAL INJURY, AND/OR PROPERTY DAMAGE HAZARD

Failure to carefully read and follow this warning could result in equipment malfunction, property damage, personal injury and/or death. Installation or repairs made by unqualified persons could result in equipment malfunction, property damage, personal injury and/or death. The information contained in this manual is intended for use by a qualified service technician familiar with safety procedures and equipped with proper tools and test instruments. Installation must conform with local building codes and with the Natural Fuel Gas Code (NFCG) NFPA 54/ANSI Z223.1, and National standards of Canada CAN/CSA−B149.1 and .2 Natural Gas and Propane Installation Codes.

INSTALLER: Affix these instructions on or adjacent to the furnace. CONSUMER: Retain these instructions for future reference.

WARNING

440 01 2024 04 Dec. 2010

Required Notice for Massachusetts Installations

Important

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

5.08: Modifications to NFPA−54, Chapter 10

2) Revise 10.8.3 by adding the following additional requirements:

(a) For all side wall horizontally vented gas fueled equipment installed in every dwelling, building or structure used in whole or in part for residential

purposes, including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet above finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall be satisfied:

1. INSTALLATION OF CARBON MONOXIDE DETECTORS. At the time of installation of the side wall horizontal vented gas fueled equipment, the installing plumber or gasfitter shall observe that a hard wired carbon monoxide detector with an alarm and battery back−up is installed on the floor level where the gas equipment is to be installed. in addition, the installing plumber or gasfitter shall observe that a battery operated or hard wired carbon monoxide detector with an alarm is installed on each additional level of the dwelling, building or structure served by the side wall horizontal vented gas fueled equipment. It shall be the responsibility of the property owner to secure the services of qualified license professionals for the installation of hard wired carbon monoxide detectors.

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

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

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

of thirty (30) days to comply with the above requirement; provided, however, that during said thirty (30) day period, a battery operated carbon monoxide detector with an alarm shall be installed.

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

3. SIGNAGE. A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a minimum height of eight (8) feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment. The sign shall read, in print size no less than one−half (1/2) inch in size, “GAS VENT DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS”.

4. INSPECTION. The state of local gas inspector of the side wall horizontally vented gas fueled equipment shall not approve the installation unless, upon inspection, the inspector observes carbon monoxide detectors and signage installed in accordance with the provisions of 248 CMR 5.08(2)(a) 1 through 4.

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

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

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

(c) MANUFACTURER REQUIREMENTS − GAS EQUIPMENT VENTING SYSTEM PROVIDED. When the manufacturer of Product Approved side wall

horizontally vented gas equipment provides a venting system design or venting system components with the equipment, the instructions provided by the manufacturer for installation of the equipment and the venting system shall include:

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

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

(d) MANUFACTURER REQUIREMENTS − GAS EQUIPMENT VENTING SYSTEM NOT PROVIDED. When the manufacturer of a Product Approved

side wall horizontally vented gas fueled equipment does not provide the parts for venting the flue gases, but identifies “special venting systems”, the following requirements shall be satisfied by the manufacturer:

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

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

(e) A copy of all installation instructions for all Product Approved side wall horizontally vented gas fueled equipment, all venting instructions, all parts lists

for venting instructions, and/or all venting design instructions shall remain with the appliance or equipment at the completion of the installation.

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

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

Specifications are subject to change without notice.

440 01 2024 04

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?

Have hoses been relocated for furnace U/D/H

application?

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: 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: Supply

Return

The Blower Speed Tap used for: High Heat

Low Heat

Optional Check: CO?

CO2?

Cooling Check

Condensate Drain Connected?

Condensate Drain Trapped?

Manual Gas Shut−off Upstream of Furnace/Drip Leg

Gas Valve turned ON?

Type of Gas: Natural: Propane:

Filter Type and Size:

Shade in Heating Fan “Time OFF” Setting and Thermostat Type setting:

Temperature of Supply Air:

Temperature of Return Air:

Temperature Difference:

Static Pressure (Ducts) Cooling: Supply

Return

The Blower Speed Tap used for: Cooling

Dealer Comments:

440 01 2024 04

Specifications are subject to change without notice.

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: 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: Supply

Return

All Electrical Connections Tight?

Have hoses been relocated for furnace U/D/H

application?

Condensate Drain Connected?

Condensate Drain Trapped?

Manual Gas Shut−off Upstream of Furnace/Drip Leg

Gas Valve turned ON?

Type of Gas: Natural: Propane:

Filter Type and Size:

Shade in Final Furnace Settings Below:

Optional Check: CO?

CO2?

Cooling Check

Temperature of Supply Air:

Temperature of Return Air:

Temperature Difference:

Static Pressure (Ducts) Cooling: Supply

Return

Dealer Comments:

Specifications are subject to change without notice.

440 01 2024 04

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause death, personal injury, or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance. The qualified installer or agency must use factory−authorized kits or accessories when 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 . 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 servicing furnaces.

WARNING

CAUTION

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 in the United States and Canada. Refer to the appropriate codes, along with this manual, for proper installation.

WARNING

• 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 “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.

440 01 2024 04

Specifications are subject to change without notice.

• 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.

Frozen Water Pipe Hazard

WATER DAMAGE TO PROPERTY HAZARD

FaiIure to follow this caution may result in property damage.

Do not leave your home unattended for long periods during freezing weather without turning off water supply and draining water pipes or otherwise protecting against the risk of frozen pipes and resultant damage.

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

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

If the structure will be unattended during cold weather you should take these precautions.

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

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.

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

Winter Shutdown

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 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 the vent drain fitting. Secure with the hose clamp.

2. Disconnect 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 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.

CAUTION

−or−

/8″ (15.9mm) OD rubber hose from the vent

/8″ (15.9mm) OD rubber hose to the stub on

/4″ (19.1mm) OD rubber hose from the

/4″ (19.1mm) OD rubber

Specifications are subject to change without notice.

440 01 2024 04

Installation

WARNING

CARBON MONOXIDE POISONING HAZARD

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

This furnace can NOT be common vented or connected to any type B, BW or L vent or vent connector, nor to any portion of a factory−built or masonry chimney. If this furnace is replacing a previously common-vented furnace, it may be necessary to resize the existing vent and chimney to prevent oversizing problems for the other remaining appliance(s). See Venting and

Combustion Air Check in the Combustion & Ventilation Air section. This furnace MUST be

vented to the outside.

Installation Positions

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

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).

! 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.

WARNING

Figure 1

*8″ (203.2mm) Min. 20′ (6.1m) Max. in same atmospheric zone

Vent Pipes MUST be supported Horizontally and Vertically

* Increase minimum from 8 (203.2mm) to 18 (457.2mm) for cold climates (sus tained temperatures 0F (-17C) and below for 24 or more consecutive hours).

Typical Upflow Installation

Aluminum or non-rusting shield recommended. (See Vent Termination Shielding for dimensions).

Coupling on ends of exhaust pipe. Total

Inlet Pipe (not used on Single Pipe model)

DISCHARGE AIR

pipe & coupling out side structure = 8″

(203.2mm)

*8″ (203.2mm) Min. 20′ (6.1m) Max. in same atmospheric zone

25−23−33

Figure 2 Typical Downflow Installation

Inlet Pipe (not used on Single Pipe model)

Vent Pipes MUST be supported Horizon tally and Vertically

See Vent Termination Shielding in Vent Section.

*8″ (203.2mm) Min. 20′ (6.1m) Max. in same atmospheric zone

Coupling on inside and outside of wall to restrain vent pipe

*8″ (203.2mm) Min. 20′ (6.1m) Max. in same atmospheric zone

8″ Min.

CAUTION

FROZEN AND BURST WATER PIPE HAZARD

FaiIure to follow this caution may result in property damage.

Special precautions MUST be made if installing furnace in an area which may drop below freezing. This can cause improper operation or damage to equipment. If furnace environment has the potential of freezing, the drain trap and drainline must be protected. The use of electric heat tape or RV antifreeze is recommended for these installations. (See “Condensate Trap Freeze

Protection Section”)

440 01 2024 04

* Increase minimum from 8 (203.2mm) to 18 (457.2mm) for cold climates (sus tained temperatures 0F (-17C) and below for 24 or more consecutive hours).

Specifications are subject to change without notice.

25−23−33a

Installation Requirements

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 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.

WARNING

CARBON MONOXIDE POISONING HAZARD

FaiIure 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.

Furnace Installation Considerations

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:

Condensate Trap 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 for upflow and downflow installations or top to bottom for horizontal installations.

Vent and Combustion Air 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 S636. The special vent fittings and accessory concentric vent termination kits and accessory external drain trap have been certified to ULC S636 for use with those Royal Pipe and IPEX PVC vent components which have been certified to this standard. In Canada, the primer and cement must be of the same manufacturer as the vent system – GVS-65 Primer (Purple) for Royal Pipe or IPEX System 636, PVC/CPVC Primer, Purple Violet for Flue Gas Venting and GVS-65 PVC Solvent Cement for Royal Pipe or IPEX System 636 Cement for Flue Gas Venting, rated Class IIA, 65 deg C. must be used with this venting system - do not mix primers and cements from one manufacturer with a vent system from a different manufacturer. Follow the manufacturer’s instructions in the use of primer and cement and never use primer or cement beyond its expiration date.

The safe operation, as defined by ULC S636, of the vent system is based on following these installation instructions, the vent system manufacturer’s installation instructions, and proper use of primer and cement. All fire stop and roof flashing used with this system must be UL listed material. Acceptability under Canadian standard CSA B149 is dependent upon full compliance with all installation instructions. Under this standard, it is recommended that the vent system be checked once a year by qualified service personnel.

The authority having jurisdiction (gas inspection authority, municipal building department, fire department, etc) should be consulted before installation to determine the need to obtain a permit.

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

/4″ (6.4mm) from front to back and from side to side

t, PVC

(1)

Specifications are subject to change without notice.

440 01 2024 04

Consignes spéciales pour l’installation de ventillation au Canada

L’installation faite au Canada doit se conformer aux exigences du code CSA B149. Ce systême de ventillation doit se composer de tuyaux, raccords, ciments et apprêts conformes au ULC S636. La tuyauterie de ventillation des gaz, ses accessoires, le terminal concentrique mural ainsi que l’ensemble du drain de condensat extérieur ont été certifiés ULCS 636 pour l’application des composantes Royal Pipe, IPEX PVC qui sont certifiées à ce standard. Au Canada, l’apprêt et le ciment doivent être du même fabricant que le système d’évacuation. L’apprêt GVS-65 (Purple) et le ciment-solvant GVS-65 doivent être utilisé avec les Royal Pipe. Système IPEX 636, apprêt PVC/CPVC, Purple pour évacuation des gaz de combustion et système IPEX 636(1)t, ciment PVC pour évacuation des gaz de combustion, coté classe IIA, 65 deg C. doivent être utilisés avec le système d’évacuation IPEX 636 – Ne pas combiner l’apprêt et le ciment d’un manufacturier avec un système d’évacuation d’un manufacturier différent.

Bien suivre les indications du manufacturier lors de l’utilisation de l’apprêt et du ciment et ne pas utiliser ceux-ci si la date d’expiration est atteinte.

L’opération sécuritaire, tel que définit par ULC S636, du système de ventilation est basé sur les instructions d’installation suivantes, ainsi que l’usage approprié de l’apprêt et ciment. Tout arrët feu et solin de toit utilisés avec ce système doivent être des matériaux listés UL. L’acceptation du standard Canadien CSA B419 est directement relié à l’installation conforme aux instructions ci- haut mentionnées. Le standard Canadien recommande l’inspection par un personel qualifié et ce, une fois par année.

Les autoritées ayant juridiction (inspecteurs de gas, inspecteurs en bâtiments, département des incendies, etc) devraient être consultées avant l’installation afin de déterminer 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.

Horizontal Furnace Installation

Figure 3

Vent Pipe

NOTE: 5″ (127mm) bottom clearance required for condensate trap.

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 louvered 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.

Typical Horizontal Installation

Inlet Pipe (not used on Single Pipe model)

Condensate Trap

25−23−34

440 01 2024 04

Specifications are subject to change without notice.

Figure 4

Dimensions and Clearances

TRAP (KO) (COUNTERFLOW)

AIR INTAKE (KO) (ALTERNATE)

TRAP (KO) UPFLOW/HORIZONTAL

(57.2)

(336.6)

(47.6 )

Unit

Capacity

*9MPT050F12

*9MPT075F14

*9MPT100J16

*9MPT125L20

*9MPV050F12

*9MPV075F12

*9MPV100J20

*9MPV125L20

*9MVX040F12

*9MVX060F12

*9MVX080J20

*9MVX100L20

* Denotes Brand

AIR INTAKE

VENT

TOP

LEFT SIDE

GAS

611/

(177.5)

ELECTRICAL

11/

(318)

(27)

11/

VENT

413/

THERMOSTAT

(KO)

215/

(549.3)

(609.6)

(122.2)

(177.8)

47/

(123.8)

(34.9)

13/

283/

(730.3)

241/

(611.2)

175/

(439.7)

111/

(42.9)

Drawing is representative, but some models may vary

BOTTOM

231/

(587.4) (98.4)

37/

ALL DIMENSIONS: in (mm)

Cabinet Bottom Top

A B

191/

(485.8)

191/

(485.8)

223/

(577.9)

241/

(622.3)

191/

(485.8)

191/

(485.8)

223/

(577.9)

241/

(622.3)

191/

(485.8)

191/

(485.8)

223/

(577.9)

241/

(622.3)

175/

(477.7)

175/

(477.7)

211/

(539.8)

(584.2)

175/

(447.7)

175/

(447.7)

211/

(539.8)

(584.2)

175/

(447.7)

175/

(447.7)

211/

(539.8)

(584.2)

D E F G H

21/

(54)

21/

(54)

(49.2)

(11.1)

21/

(54)

21/

(54)

(49.2)

(11.1)

21/

(54)

21/

(54)

(49.2)

(11.1)

143/

(374.7)

143/

(374.7)

183/

(476.3)

(584.2)

143/

(374.7)

143/

(374.7)

183/

(476.3)

(584.2)

143/

(374.7)

143/

(374.7)

183/

(476.3)

(584.2)

115/

(758.8)

297/

43/

(111 .1)

43/

(111 .1)

43/

(111 .1)

43/

(111 .1)

43/

(111 .1)

43/

(111 .1)

43/

(111 .1)

43/

(111 .1)

43/

(111 .1)

43/

(111 .1)

43/

(111 .1)

43/

(111 .1)

3111/

(804.9)

1311/

(347.7)

1913/

(503.2)

41/

(114.3)

41/

(114.3)

41/

(114.3)

41/

(114.3)

41/

(114.3)

41/

(114.3)

41/

(114.3)

41/

(114.3)

41/

(114.3)

41/

(114.3)

41/

(114.3)

41/

(114.3)

MINIMUM CLEARANCES TO COMBUSTIBLE

A B

MATERIALS FOR ALL UNITS − in (mm)

REAR 0 FRONT (combustion air openings in

3″ (76.2)

furnace and in structure)

FRONT

Required For Service

ALL SIDES Of SUPPLY PLENUM 1″ (25.4)

*24″ (609.6)

SIDES 0 VENT 0 TOP OF FURNACE 1″ (25.4)

*30″ (762mm) clearance recommended for furnace removal.

Horizontal position: Line contact is permissible only between

(30.2)

21/

(63.5)

21/

(63.5)

25/

(66.7)

21/

(57.2)

21/

(63.5)

21/

(63.5)

25/

(66.7)

21/

(57.2)

21/

(63.5)

21/

(63.5)

25/

(66.7)

21/

(57.2)

91/

(241.3)

91/

913/

(249.2)

(241.3)

113/

(288.9)

121/

(311.2)

91/

(241.3)

91/

(241.3)

113/

(288.9)

121/

(311.2)

91/

(241.3)

91/

(241.3)

113/

(288.9)

121/

(311.2)

lines formed by intersections of top and two sides of furnace jacket, and building joists, studs or 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.

(31.7)

(73)

11/

GAS (KO)

297/

(758.8)

273/

(690.6)

215/

3311/

(855.7)

(549.3)

KO = KnockOut

(60.3 )

(27)

413/

(122.2)

11/

(27)

(439.7)

175/

111/

(42.9)

(109.5)

45/

(177.8)

(123.8)

281/

(723.9)

(469.9)

RIGHT SIDE

TRAP (KO) (COUNTERFLOW)

ELECTRICAL (KO)

AIR INTAKE (KO) (ALTERNATE)

VENT (KO) TRAP (KO) UPFLOW/HORIZONTAL

21/

(609.6)

215/

(549.3)

(57.2)

(336.6)

THERMOSTAT

131/

(KO)

(19.1)

TYPE

(1016)

17/

(47.6)

25−23−36b

Specifications are subject to change without notice.

440 01 2024 04

Knock Outs

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

CAUTION

Combustion & Ventilation Air

Figure 5

Hammer and Screwdriver Used for Knockout

25-40-06

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

For Single Pipe Installation (Non−Direct Vent)

CARBON MONOXIDE POISONING HAZARD

Failure to follow this warning may 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 National Fuel Gas Code, NFPA54/ANSI Z223.1, 2009 (or current edition) and applicable provisions of local building codes.

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, National Fuel Gas Code (NFGC), ANSI Z223.1/NFPA 54−2009 in the U.S.,

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

3. Applicable provisions of the local building code.

This furnace can NOT be common vented or connected to any type B, BW or L vent or vent connector, nor to any portion of a factory−built or masonry chimney. Multistory venting is NOT permitted. If this furnace is replacing a previously common-vented furnace, it may be necessary to resize the existing vent and chimney to prevent oversizing problems for the other remaining appliance(s). See “Venting and Combustion Air Check” in this section. This furnace MUST be vented to the outside.

When the installation is complete, check that all appliances have adequate combustion air and are venting properly. See Venting And Combustion Air Check in “Gas Vent Installation” Section in this manual.

WARNING

Outdoor Combustion Air 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.

Air Openings and 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

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.

/4″ (6.4mm) mesh.

Confined Space Installation

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

2. Figure 6 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).

440 01 2024 04

Specifications are subject to change without notice.

Figure 6

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

This installation NOT approved in Canada

Gable Vent

Gas Vent

Ventilated Attic

Top Above Insulation

Outlet Air (1)

Ventilated Crawl Space

Alternate Inlet Air (1)

Soffit Vent

Inlet Air (1)

Gas Vent

Ventilated Attic

Top Above Insulation

OutletAir (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 cm

/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

Gas Vent

Gable Vent

Soffit Vent

Inlet Air (2)

Outlet Air (1)

Inlet Air (1)

Minimum One Inlet and One Outlet Air Supply is Required May be in any Combination Shown

Inlet Air Opening Must be Within12″ (304.8mm) of floor

Outlet Air Opening Must be Within12″ (304.8mm) of ceiling

(1) 1 Square Inch per 4000 BTUH

(2) 1 Square Inch per 2000 BTUH

Inlet Air (2)

Outlet Air (2)

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

/kW) for combined input of all gas appliances in area

cm (see Table 1).

Table 1

BTUH (kW)

Input Rating

40,000 (11.72) 20 sq. in. (129 cm2) 13.34 sq. in. (86 cm2) 10 sq. in. (65 cm2) 4″ (101.6mm)

50,000 (14.65) 25 sq. in. (161 cm2) 16.7 sq. in. (108 cm2) 12.5 sq. in. (81 cm2) 4″ (101.6mm)

60,000 (17.58) 30 sq. in. (194 cm2) 20 sq. in. (129 cm2) 15 sq. in. (97 cm2) 5″ (127mm)

75,000 (21.98) 37.5 sq. in. (242 cm2) 25 sq. in. (161 cm2) 18.75 sq. in. (121 cm2) 5″ (127mm)

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

100,000 (29.31) 50 sq. in. (322 cm2) 33.3 sq. in. (215 cm2) 25 sq. in. (161 cm2) 6″ (152.4mm)

125,000 (36.63) 62.50 sq. in. (403 cm2) 41.7 sq. in. (269 cm2) 31.25 sq. in. (202 cm2) 7″ (177.8mm)

EXAMPLE: Determining Free Area

Furnace 100,000

29.31 Furnace 100,000

29.31

Free Area

Two Horizontal Ducts

BTUH (kW)

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

Water Heater

30,000

8.8

Water Heater

30,000

8.8

Minimum Free Area Required for Each Opening or Duct to Outdoors

Single Opening

BTUH (kW)

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

Total Input

(130,000 ÷ 4,000)

(38.11 ÷ .18)

Total Input

(130,000 ÷ 2,000)

(38.11 ÷ .09)

Specifications are subject to change without notice.

Two Vertical Ducts or Openings

= 32.5 Sq. In. Vertical = 210 cm2 Vertical

= 65 Sq. In. Horizontal = 423 cm2 Horizontal

BTUH (kW)

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

Round Duct

BTUH (kW)

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

440 01 2024 04

Indoor Combustion Air (Unconfined Space)

Standard and 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 this warning could result in personal

injury or death. Most homes will require additional air from

outdoors for combustion and ventilation. A space with at least 50 cubic feet per 1,000 BTUH (4.8 cubic meters per kW) input rating or homes with tight construction may need outdoor air, supplied through ducts, to supplement air infiltration for proper combustion and ventilation of flue gases.

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) of the maximum input ratings for all 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 is known to be less than 0.40 air changes per hour

Table 2

ACH

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

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

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

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

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

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

0.00 NP NP NP NP NP NP NP

ACH = Air Changes per Hour NP = Not Permitted

Table 2 Minimum Space Volumes were determined by using the following equations from the National Fuel Gas Code ANSI Z223.1/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 Vol ume

WARNING

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

Other Than Fan-Assisted Total Fan-assisted Total

30,000 BTU

(8,790 kW)

other



21 ft

ACH

59 m

ACH

40,000 BTU (11,720 kW)

(

other

1000 BTUH

other

.293 kW

50,000 BTU (14,650 kW)

)

(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.

WARNING

CARBON MONOXIDE POISONING HAZARD

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

An unconfined space or homes with tight construction may not have adequate air infiltration for proper combustion and ventilation of flue gases.

Most homes will require additional air.

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.

50,000 BTU (14,650 kW)

)

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

Required Vol ume

where:

= all appliances other than fan−assisted input in BTUH

other

= fan−assisted appliance input in BTUH

fan

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

exchanged per hour, expressed as a decimal)

75,000

(21,975 kW)

fan



100,000 BTU

(29,300 kW)

15 ft

ACH

.42 m

ACH

( (

1000 BTUH

.293 kW

125,000 BTU

(36,625 kW)

fan

) )

440 01 2024 04

Specifications are subject to change without notice.

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 cm 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 in

/kW) of the total input rating of all gas appliances in the

(22cm space, but not less than 100 in 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).

(645 cm2). One opening shall

/kW) of total input

/1,000 BTUH

• 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 of at 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.

Ventilation Air

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.

Venting and Combustion Air 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 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.

Figure 7

Vent Pipe

Typical Gas Water Heater

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 Propane Installation Code and these instructions. Determine

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 Check

Draft Hood

Match

WARNING

Specifications are subject to change without notice.

440 01 2024 04

For Two Pipe Installation (Direct Vent)

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

Vent and Combustion Air Piping

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.

WARNING

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.

Dual Certified (*9MPT, *9MPV, *9MVX Models) Direct or Non-Direct Vent

This furnace is certified 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.

Contaminated Combustion Air

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

The following areas or types of structures may contain or have exposure to the substances listed below. The installation must be evaluated carefully as it may be necessary to provide outside air for combustion.

• Commercial buildings.

• Buildings with indoor pools.

• Furnaces installed in laundry rooms.

• Furnaces installed in hobby or craft rooms.

• Furnaces installed near chemical storage areas.

• Permanent wave solutions for hair.

• Chlorinated waxes and cleaners.

• Chlorine based swimming pool chemicals.

• Water softening chemicals.

• De−icing salts or chemicals.

• Carbon tetrachloride.

• Halogen type refrigerants.

• Cleaning solvents (such as perchloroethylene).

• Printing inks, paint removers, varnishes, etc.

• Hydrochloric acid.

• Sulfuric Acid.

• Solvent cements and glues.

• Antistatic fabric softeners for clothes dryers.

• Masonry acid washing materials.

440 01 2024 04

Specifications are subject to change without notice.

Vent and Combustion Air Piping 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

Materials

ABS D1527 __ F628

PVC D1785 D2241 F891

CPVC F441 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.

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 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

Sch. 40

Pipe

−− −− −− −− −− 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 (304.8mm) of run is required to properly return condensate to the furnace drain system.

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

SDR Pipe

Cell

Core

Pipe

Fittings Primer

D2468

D2661

D2466

D2665

−− D2235

F656 D2564

/4″ (6.4mm) per foot

Solv.

Cement

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

(1.8m) 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 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).

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 ONLY the piping protrudes.

• The termination clearances shown in Figure 8 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.

Combustion Air and Vent Piping Insulation Guidelines

NOTE: Use closed cell, neoprene insulation or equivalent. If Fiberglass or equivalent insulation is used it must have a vapor barrier. Use R values of 7 up to 10′ (3.1m), R−11 if exposure exceeds 10′ (3.1m). 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.

Sizing Combustion Air and Vent 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.

Table 3

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° 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 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.

Table 4

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° 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 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 (meters) of pipe is whichever pipe run is the longest, either inlet or outlet side. For concentric vent pipe diameter see Concentric Termination tables in this manual.

Pipe Diameter Table

Single Piping ONLY

125,000 Btuh Furnace

″ (50.8mm) and 3″ (76.2mm)

Pipe Diameter Table

Dual Piping ONLY

125,000 Btuh Furnace

″ (50.8mm) and 3″ (76.2mm)

Vent Termination Clearances

CARBON MONOXIDE POISONING HAZARD

Failure to follow this warning could result in death 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 30. For concentric vent termination clearances, refer to Concentric Termination Kit instructions.

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 is taken 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.

WARNING

Specifications are subject to change without notice.

440 01 2024 04

Figure 8 Direct Vent Termination Clearance

Item Clearance Description Canadian Installation (1)

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

anticipated snow level

B Clearance to a window or door that may be opened 12″ (30 cm) for appliances u 10,000 Btuh (3 kW) and v

C Clearance to a permanently closed window

D Vertical clearance to a ventilated soffit located above the

terminal within a horizontal 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 3′ (91 cm)

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 6′ (1.83 m) 3′ (91 cm) above if within 10′ (3m) horizontally

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

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 other appliances direct vent intake or exhaust.

O Clearance from a plumbing vent stack 3′ (91 cm) 3′ (91 cm)

P Clearance above a paved sidewalk or paved driveway lo

cated on public property.

u greater than, w greater than or equal to, t less than, v less than or equal to (1.) In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code (2.) In accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code # 18″ (46 cm) above roof surface + 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 installation codes and

the requirements of the gas supplier and the manufacture's installation instructions.

** A vent shall not terminate directly 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 nuisance or hazard or property damage; or c. 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 conditions which 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.

12″ (30cm) # 12″ (30 cm)

100,000 Btuh (30 kW), 36″ (91 cm) for appliances u 100,000 Btuh (30 kW)

9″ (23 cm) for appliances u 10,000 Btuh (3 kW) and v 50,000 Btuh (14.7 kW), 12″ (30 cm) for appliances u 50,000 Btuh (14.7 kW)

* * * *

* * * * * *

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

12″ (30 cm) for appliances u 10,000 Btuh (3 kW) and v 100,000 Btuh (30 kW), 36″ (91 cm) for appliances u 100,000 Btuh (30 kW)

9″ (23 cm) for appliances u 10,000 Btuh (3 kW) and v 50,000 Btuh (15 kW), 12″ (30 cm) for appliances u 50,000 Btuh (14.7 kW)

12″ (30 cm) 12″ (30 cm)

3′ (91 cm) 3′ (91 cm)

7′ (2.13 m) **

U.S. Installation (2)

440 01 2024 04

Specifications are subject to change without notice.

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