ICP C8DNL, H8DNL, T8DNL Installation Instructions Manual

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Page 1

Printed in U.S.A. 441 01 2314 06 July 2010

INSTALLATION INSTRUCTIONS

80% Single Stage, Downflow,

Category I, Gas Furnace

C8DNL, H8DNL, T8DNL

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

Safety Labeling and Signal Words

DANGER, WARNING, CAUTION, and NOTE

The signal words DANGER, WARNING, CAUTION, and NOTE are used to identify levels of

hazard seriousness. The signal word DANGER is only used on product labels to signify an immediate hazard. The signal words WARNING, CAUTION, and NOTE will be used on product labels and throughout this manual and other manual that may apply to the product.

DANGER − Immediate hazards which will result in severe personal injury or death.

WARNING − Hazards or unsafe practices which could result in severe personal injury or death.

CAUTION − Hazards or unsafe practices which may result in minor personal injury or product or property damage.

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

WARNING

Signal Words in Manuals

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.

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

Safety−alert symbol

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

TABLE OF CONTENTS

SAFETY CONSIDERATIONS 2...................

Safe Installation Requirements 3..................

INSTALLATION 4...............................

Combustion & Ventilation Air 6....................

Gas Vent Installation 9...........................

Venting (Horizonta) 10............................

Venting (Chimney Adapter) 12.....................

Gas Supply and Piping 15.........................

Electrical Wiring 17...............................

Ductwork and Filter 18............................

Checks and Adjustments 23.......................

Furnace Maintenance 27..........................

Sequence of Operation & Diagnostics (*8DNL) 28....

Wiring Diagram (*8DNL) 32.......................

International Comfort Products, LLC

Lewisburg, TN 37091 U.S.A.

WARNING

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.

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.

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441 01 2314 06

Specifications are subject to change without notice

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.

WARNING

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.

WARNING

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.

CAUTION

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441 01 2314 06

Specifications are subject to change without notice.

START−UP CHECK SHEET

For 80+ Furnace

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

Date of Start−Up:

Dealer Name:

Address:

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

Phone:

Owner Name:

Address:

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

Model Number:

Serial Number:

Setup Checks

Check the box when task is complete

Thermostat: Heat

Cooling Fan

Subbase level:

Anticipator Set: Setting of Anticipator ____

All Electrical Connections Tight:

Supply voltage: ____

Blower Motor H.P.: ____

Fan “Time ON” setting: ____ Fan “Time OFF” Setting ___

Manual Gas Shut−Off Upstream of Furnace/Drip−Leg?

Gas Valve turned ON?

Type of Gas: Natural: Propane:

Filter Type and Size:

Calculated Firing Rate:(See Checks and Adjustments Sec-

tion).

Heating Check

Measured Line Pressure when Firing Unit:

Measured Manifold Gas Pressure:

Temperature of Supply Air: (°)

Temperature of Return Air: (°)

Temperature Rise (supply−return temperature): (°)

In Rise (see furnace rating plate)? (°)

Static Pressure (Ducts): Supply Air Return

Blower speed tap used for heating

Limit Opens: (°) Limit Closes: (°)

Optional Check: CO ? CO2 ?

Cooling Check

Temperature of Supply Air: (°)

Temperature of Return Air: (°)

Temperature Difference: (°)

Static Pressure (Ducts) cooling: Supply Air Return

Blower Speed Tap used for cooling: _______

Dealer Comments:

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Specifications are subject to change without notice.

1. Safe Installation Requirements

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

maintenance or installation could cause death, personal injury, 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.

WARNING

NOTE: This furnace is design−certified by CSA International (for-

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

• Use only the Type of gas approved for this furnace (see Rat-

ing Plate on unit). Overfiring will result in failure of heat ex-

changer and cause dangerous operation. (Furnaces can be converted to Propane gas with approved kit.)

• Install this furnace only in a location and position as speci-

fied in “Installation” of these instructions.

• Provide adequate combustion and ventilation air to the fur-

nace as specified in “Combustion and Ventilation Air” of these instructions.

• Combustion products must be discharged outdoors. Con-

nect this furnace to an approved vent system only, as specified in “Gas Vent Installation, Horizontal Venting and Masonry Chimney Venting” of these instructions.

• Never test for gas leaks with an open flame. Use a commer-

cially available soap solution made specifically for the detection of leaks to check all connections, as specified in “Gas Supply and Piping, Final Check” of these instructions.

• Always install furnace to operate within the furnace’s in-

tended 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 cir-

culated by the furnace to areas outside the space containing the furnace, the return air shall also be handled by a duct(s) sealed to the furnace casing and terminating outside the space containing the furnace.

• A gas−fired furnace for installation in a residential garage

must be installed as specified in “Installation” of these instructions.

• This furnace is not to be used for temporary heating of build-

ings or structures under construction. See “ Installation”

• 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 pro-

tected 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 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 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 agency 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 Failure to follow this warning could 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.

WARNING

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441 01 2314 06

Specifications are subject to change without notice.

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

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

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

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

−or−

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

−or−

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

2. Installation

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

personal injury or death. If this furnace is replacing a previously common-

vented furnace, it may be necessary to resize the existing vent system to prevent oversizing problems for the other remaining appliances(s). See

Venting and Combustion Air Check in the Gas Vent Installation section of this instruction.

WARNING

Location and Clearances

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 1).

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

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. (See Gas Vent Installation section).

5. Do NOT install furnace directly on carpeting, tile or other combustible material. See Ductwork and Filter Sub−base for Combustible Floors.

6. Maintain clearance for fire safety and servicing. A front clearance of 24″ (609.6mm) required and 30″ (762mm) recommen-

ded for access to the burner, controls and filter. See clearance requirements in Figure 1.

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

8. Residential garage installations require:

• Burners and ignition sources installed at least 18″ above

the floor.

• Furnace must be located or physically protected from

possible damage by a vehicle.

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

10. This furnace may be used for construction heat provided that:

• The furnace is permanently installed with all electrical wir-

ing, 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 main-

tained 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 neces-

sary to remove drywall dust and construction debris from all HVAC system components after construction is completed.

• Verify proper furnace operating conditions including igni-

tion, gas input rate, air temperature rise, and venting according to these installation instructions.

Page 6

23/

37/

415/

ALL DIMENSIONS in(mm)

1 in = 25.4 mm

Drawing is representative, some models may vary in appearance

NOTE: Evaporator “A” coil drain pan dimensions may vary from furnace duct opening size. Always consult evaporator specifications for duct size requirements.

Unit is designed for top return ONLY.

Return air through back of unit is NOT allowed.

TOP

water heater

25−24−15a−1

30″

165/

81/

BOTTOM

LEFT SIDE

2415/

91/

181/

93/

213/

11/

FRONT

RIGHT SIDE

181/

37/

11/

93/

2415/

121/

33/

281/

313/

(724)

(470)

(762)

(17)

(97)

(19)

(27)

(232)

(633)

(71)

(98)

(233)

(125)

(17)

(210)

(422)

(95)

(306)

(633)

(267)

(1016)

(27)

(56)

(233)

(17)

(98)

441 01 2314 06

Specifications are subject to change without notice.

Figure 1 UNIT Dimensions and Clearances (*8DNL)DIMENSIONS

MINIMUM CLEARANCES TO COMBUSTIBLE

MATERIALS FOR ALL UNITS

REAR 0

FRONT 3″ (76 mm)

Recommended For Service 30″ (762 mm)

ALL SIDES Of SUPPLY PLENUM 1″ (25 mm)

SIDES 0

VENT

Single Wall Vent 6″ (152 mm)

Type B−1 Double Wall Vent 1″ (25 mm)

TOP OF FURNACE 1″ (25 mm)

Horizontal position: Line contact is permissible only between lines formed by intersections of top and two sides of furnace jacket, and building joists, studs or framing.

DIMENSIONAL INFORMATION

Unit

Capacity

Cabinet Top Bottom

A B C D

*8DNL050B12 *8DNL075B12

15 1/

(394)

(356)

55/

(135)

14 1/

(359)

*8DNL075F16 *8DNL100F14

19 1/

(486)

17 5/

(447)

7 3/

(197)

17 11/

(449)

*8DNL100L20 *8DNL125L20

(622)

(584)

10 7/

(265)

23 1/

(587)

* Denotes Brand

Furnace Installation

Inspect the rating plate to be certain the model number begins with “*8DNL”. This identifies the furnace as a dedicated downflow furnace that is permitted to be Installed in a Downflow position. (see Figure 2). * Denotes Brand

Downflow

The minimum clearances to combustible material MUST be maintained between the furnace and adjacent construction, as shown in Figure 1.

FIRE HAZARD Failure to follow this warning could result in

personal injury, death and/or property damage. Place furnace on noncombustible subbase on

downflow applications, unless installing on noncombustible flooring.

WARNING

In addition to clearances in Figure 1, clearance for the vent pipe must be considered.

A subbase for combustible floors MUST be used when the furnace is installed on combustible material. See “Ductwork and Filter”.

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441 01 2314 06

Specifications are subject to change without notice.

Typical Downflow Installation

Figure 2

VENT

GAS SUPPLY

SUPPLY

AIR

RETURN

AIR

25−24−38

3. Combustion & Ventilation Air

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.

WARNING

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

Combustion and ventilation air must be supplied in accordance with one of the following:

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

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

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

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

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

3. Applicable provisions of the local building code.

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.

Contaminated Combustion Air

Installations in certain areas or types of structures could cause excessive exposure to contaminated air having chemicals or halogens that will result in safety and performance related problems and may harm the furnace. These instances must use only outdoor air for combustion.

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 outdoor 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.

Outdoor Combustion Air Method

A space having less than 50 cubic feet per 1,000 BTUH (22 cm

/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 gas appliances in the space MUST be considered when determining free area of openings.

2. Connect ducts or openings directly to the outdoors.

3. When screens are used to cover openings, the openings MUST be no smaller than

/4″ (6.4mm) mesh.

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

5. When sizing a grille, louver, or screen use the free area of opening. If free area is NOT stamped or marked on grill or louver, assume a 20% free area for wood and 60% for metal. Screens shall have a mesh size not smaller than

/4″ (6.4mm)

requirements

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441 01 2314 06

Specifications are subject to change without notice.

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

2. Figure 3 illustrates how to provide combustion and ventilation air when two permanent openings, one inlet and one outlet, are used.

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

the floor and the second opening MUST commence within 12″ (304.8mm) of the ceiling.

b. Size openings and ducts per Table 1.

Furnace

Minimum One Inlet and One Outlet Air Supply is Required

May be in and Combination Shown

Inlet Air Opening Must be Within 12″ (304.8 mm) of floor

Outlet Air Opening Must be Within 12″ (304.8 mm) of ceiling

(1) 1 Square Inch per 4000 BTUH

(2) 1 Square Inch per 2000 BTUH

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

Figure 3

This installation NOT approved in Canada

Gas Vent

Gable Vent

Outlet Air (1)

Furnace

Outlet Air (2)

Optional Inlet Air (1)

Ventilated Attic

Ventilated Crawl Space

Inlet Air (1)

Inlet Air (2)

Top Above Insulation

Soffit Vent

c. Horizontal duct openings require 1 square inch of free area

per 2,000 BTUH (11 cm

/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 cm

/kW) for combined input of all gas ap-

pliances in the space (see Table 1).

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

a. 1 sq. in of free area per 3,000 BTUH (7 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″ from the front. The open-

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

4. Combination of Indoor and Outdoor Air shall have: a. Indoor openings that comply with the Indoor Combus-

tion Air Method below and

b. Outdoor openings located as required in the Outdoor

Combustion Air Method above and

c. Outdoor openings sized as follows.

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

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

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

Table 1

Free Area

BTUH (kW)

Input

Rating

Minimum Free Area Required for Each Opening or Duct to Outdoors

Two Horizontal Ducts

BTUH (kW)

sq. in./2,000(1 cm

/.09)

Single Opening

BTUH (kW)

sq. in./3,000 (1 cm

/.135)

Two Vertical Ducts or Openings

BTUH (kW)

sq. in./4,000(1 cm

/.18)

Round Duct

BTUH (kW)

sq. in./4,000(6.5cm

/.18)

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

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

150,000 (43.95) 75 sq. in. (484 cm2) 50 sq. in. (322 cm2) 37.5 sq. in. (242 cm2) 7″ (177.8mm)

EXAMPLE: Determining Free Area

Furnace 100,000

29.31 Furnace 100,000

29.31

Water Heater

30,000

8.8

Water Heater

30,000

8.8

Total Input

(130,000 ÷ 4,000)

(38.11 ÷ .18)

Total Input

(130,000 ÷ 2,000)

(38.11 ÷ .09)

= 32.5 Sq. In. Vertical = 210 c

Vertical

= 65 Sq. In. Horizontal = 423

Horizontal

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441 01 2314 06

Specifications are subject to change without notice.

Indoor Combustion Air

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

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

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

WARNING

Standard and Known-Air-Infiltration Rate Methods

 NFPA & AGA

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

The Standard Method may be used, if the space has no less volume than 50 cubic feet per 1,000 BTUH (4.8 cubic meters per kW) input rating for all gas appliances installed in the space. The stan- dard method permits indoor air to be used for combustion and ventilation air.

The Known Air Infiltration Rate Method shall be used if the in- filtration 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.

Table 2

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

Other Than Fan-Assisted Total Fan-assisted Total

ACH

30,000 BTU

(8.79 kW)

40,000 BTU

(11.72 kW)

50,000 BTU

(14.65 kW)

50,000 BTU

(14.65 kW)

75,000

(21.98 kW)

100,000 BTU

(29.30 kW)

125,000 BTU

(36.63 kW)

150,000 BTU

(43.95 kW)

(m3)

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) 3,750 (105)

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) 4,500 (126)

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) 5,625 (158)

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) 7,500 (210.6)

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) 11,250 (316)

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) 22,500 (632)

0.00 NP NP NP NP NP NP NP NP

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, 9.3.3.2:

1. For other than fan−assisted appliances such as a draft hood−equipped water heater,

1000 BTUH

21 ft

(

other

)

Vol ume

other

ACH

.293 kW

59 m

(

other

)

Required Vol ume

other



ACH

2. For fan−assisted appliances such as this furnace,

If:

other

= combined input of all other than fan−assisted

appliances in BTUH

fan

= combined input of all fan−assisted appliances in

BTUH

ACH = air changes per hour (ACH shall not exceed 0.60.)

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.

• Combining spaces on the same floor level. Each opening

shall have a free area of at least 1 in.

/1,000 BTUH (22

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

space, but not less than 100 in.

(645 cm2). Once opening shall commence within 12” (604.8mm) of the ceiling and the second opening shall commence within 12” (604.8mm) of the floor. The minimum dimension of air openings shall be at least 3 in(76.2mm).

• 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

/kW) of total input rating

for all gas appliances in the space.

• In spaces that use the Indoor Combustion Air Method, in-

filtration 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

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441 01 2314 06

Specifications are subject to change without notice.

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 replace-

ment air. Whichever method is used, the mixed return air temperature across the heat exchanger MUST not fall below 60° F(16° C) continuously, or 55° F(13° C) on an intermittent basis 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.

4. Gas Vent Installation

CARBON MONOXIDE POISONING, FIRE AND EXPLOSION HAZARD

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

Read and follow all instructions in this section.

WARNING

Install the vent in compliance with codes of the country having jurisdiction, local codes or ordinances and these instructions.

This Category I furnace is fan−assisted. A fan assisted appliance is an appliance equipped with an integral mechanical means to either draw or force products of combustion through the heat exchanger.

Category I furnace definition: A central furnace which operates with a non−positive vent static pressure and with a flue loss not less than 17 percent. These furnaces are approved for common− venting and multi−story venting with other fan−assisted or draft hood−equipped appliances in accordance with the NFGC or NSCNGPIC.

Category I Safe Venting Requirements

Category I furnace vent installations shall be in accordance with Parts 10 and 13 of the National Fuel Gas Code, ANSI Z223.1/NFPA 54−2009; and/or Section 8 and Appendix C of the CSA B149.1−05, National Standard of Canada, Natural Gas and Propane Installation Code; the local building codes; furnace and vent manufacturer’s instructions.

NOTE: The following instructions comply with the ANSI Z223.1/NFPA 54 National Fuel Gas Code and CSA B149.1 Natural Gas and Propane Installation code, based on the input rate on the furnace rating plate.

1. If a Category I vent passes through an attic, any concealed space or floor, use ONLY Type B or Type L double wall vent pipe. If vent pipe passes through interior wall, use Type B vent pipe with ventilated thimble ONLY.

2. Do NOT vent furnace into any chimney serving an open fire- place or solid fuel burning appliance.

3. Use the same diameter Category I connector or pipe as permitted by:

• the National Fuel Gas Code Code ANSI Z223.1/NFPA

54−2009 Sections 12 and 13 venting requirements in the United States,

• the National Standard of Canada Natural Gas and Pro-

pane Installation Code (NSCNGPIC) CSA B149.1−05

Section 8 and appendix C venting requirements in Canada.

4. Push the vent connector onto the furnace flue collar of the venter assembly until it touches the bead [at least

/8″ (15.9mm) overlap] and fasten with at least two field−supplied, corrosion−resistant, sheet metal screws located at least 140° apart.

5. Keep vertical Category I vent pipe or vent connector runs as short and direct as possible.

6. Vertical outdoor runs of Type−B or ANY single wall vent pipe below the roof line are NOT permitted.

7. Slope all horizontal runs up from furnace to the vent terminal a minimum of

/4″ per foot (10mm/m)

8. Rigidly support all horizontal portions of the venting system every 6′ (1.8m) or less using proper clamps and metal straps to prevent sagging and ensure there is no movement after installation.

9. Check existing gas vent or chimney to ensure they meet clearances and local codes. See Figure 1

10. The furnace MUST be connected to a factory built chimney or vent complying with a recognized standard, or a masonry or concrete chimney lined with a lining material acceptable to the authority having jurisdiction. Venting into an unlined ma-

sonry chimney or concrete chimney is prohibited. See the Masonry Chimney Venting section in these instructions.

11. Fan−assisted combustion system Category I furnaces shall not be vented into single−wall metal vents.

12. Category I furnaces must be vented vertically or nearly vertically, unless equipped with a listed mechanical venter.

13. Vent connectors serving Category I furnaces shall not be connected into any portion of mechanical draft systems operating under positive pressure.

A 4−to−3 inch (101.6−to−76.2mm) reducer is permitted at the flue collar when installing a 50,000 BTUH (14.5 kW) gas input furnace, if the installation meets all the following requirements for sizing the vent connectors and vents:

1. The National Fuel Gas Code, ANSI Z223.1/NFPA−54−2009, Sections 12.6.3.1(1),

12.7.3.1(2), 12.11.3.1, 13.1.2, 13.1 (e), and 13.2.24(1) through (3) in the U.S. or

2. The Natural Gas and Propane Installation Code CSA B149.1−05, Sections 8.13.1(b), 8.13.2(b), 8.18.5(b), and Appendix C−GVR no. 2. in Canada.

Venting and Combustion Air Check

NOTE: When an existing Category I furnace is removed or replaced, the original venting system may no longer be sized to properly vent the attached appliances, and to make sure there is adequate combustion air for all appliances, MAKE THE FOL-

LOWING CHECK.

Vent Check

Draft HoodVent Pipe

Match

Typical Gas Water Heater

Figure 4

NOTE: If flame pulls towards draft hood, this indicates

sufficient infiltration air.

Page 11

441 01 2314 06

Specifications are subject to change without notice.

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 4)

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.

WARNING

Venting to Existing Masonry Chimney

Dedicated venting of one fan assisted furnace into any masonry chimney is restricted. A chimney must first be lined with

either Type B vent sized in accordance with NFGC tables 13.1 or

13.2 or a listed metal lining system, sized in accordance with the NFGC Section 13.1.7 for a single appliance or 13.2.20 for multiple appliances, or NSCNGPIC Appendix C, Section 10. (See Masonry Chimney Venting of these instructions.)

Listed, corrugated metallic chimney liner systems in masonry chimneys shall be sized in the U.S. by using NFGC tables per

13.1.7 for dedicated venting and per 13.2.20 for common venting with the maximum capacity reduced by 20% (0.80 X maximum capacity) and the minimum capacity as shown in the applicable table. Corrugated metal vent systems installed with bends or offsets require additional reduction of 5% of the vent capacity for each bend up to 45° and 10% of the vent capacity for each bend from 45° up to 90°. In Canada, use the NSCNGPIC.

NOTE: Two(2) 45° elbows are equivalent to one (1) 90° elbow.

Combined Venting into a Masonry Chimney

Venting into a masonry or concrete chimney is only permitted as outlined in the NFGC or NSCNGPIC venting tables. Follow

all safe venting requirements.

Note: See section “Masonry Chimney Venting”.

5. Horizontal Venting

Category I Furnaces With External Power Venters

In order to maintain a Category I classification of fan−assisted furnaces when vented horizontally with sidewall termination, a power venter is REQUIRED to maintain a negative pressure in the vent- ing system.

In the U.S.: Per the NFGC, a listed power venter may be used, when approved by the authority having jurisdiction.

In Canada: Only power venters approved by the power venter manufacturer and where allowed by the authority having jurisdiction may be used.

Please consult the Fields Controls Co. or Tjernlund Products, Inc. for power venters certified for use with this furnaces.

Vent Termination

Venting Through a Non-Combustible and Combustible Wall

Consult External Power Venter manufacturer instructions.

Select the power venter to match the Btuh input of the furnace being vented. Follow all of the power venter manufacturer’s installation requirements included with the power venter for:

• venting installation,

• vent terminal location,

• preventing blockage by snow,

• protecting building materials from degradation by flue gases,

• see Figure 5 for required vent termination.

NOTE: It is the responsibility of the installer to properly terminate the vent and provide adequate shielding. This is essential in order to avoid water/ice damage to building, shrubs and walkways.

Page 12

441 01 2314 06

Specifications are subject to change without notice.

Figure 5 Other than Direct Vent Termination Clearance

Item Clearance Descriptions Canadian Installation (1)

U.S. Installation (2)

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

anticipated snow level

12″ (30cm) # 12″ (30 cm)

B Clearance to a window or door that may be opened 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)

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

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

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

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)

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

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

* *

P Clearance above a paved sidewalk or paved driveway located

on public property.

7′ (2.13 m) **

7′ (2.13 m)

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.

Page 13

441 01 2314 06

Specifications are subject to change without notice.

6. Masonry Chimney Venting

Chimney Inspection

All masonry chimney construction must conform to Standard ANSI/NFPA 211−2006 and to any state or local codes applicable. The chimney must be in good condition and a complete chimney inspection must be conducted prior to furnace installation. If the inspection reveals damage or abnormal conditions, make necessary repairs or seek expert help. See “The Chimney Inspection Chart” Figure 6. Measure inside area of tile−liner and exact height of chimney from the top of the chimney to the highest appliance flue collar or drafthood outlet.

Connector Type

To reduce flue gas heat loss and the chance of condensate problems, the vent connector must be double−wall Type B vent.

Venting Restrictions for Chimney Types

Interior Chimney − has no sides exposed to the outdoors below the roofline. All installations can be single furnace or common vented with another draft hood equipped Category I appliance.

Exterior Chimney − has one or more sides exposed to the out- doors below the roof line. All installations with a 99% Winter Design Temperature* below 17° F (−8° C) must be common vented only with a draft hood equipped Category I appliance.

* The 99% Winter Design Dry−Bulb (db) temperatures are

found in the 2005 ASHRAE Fundamentals Handbook CD and Chapter 28.

CARBON MONOXIDE POISONING, FIRE AND EXPLOSION HAZARD

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

These furnaces are CSA (formerly AGA and CGA) design−certified for venting into exterior clay tile−lined masonry chimneys with a factory accessory Chimney Adapter Kit. Refer to the furnace rating plate for correct kit usage. The Chimney Adapter Kits are for use with ONLY furnaces having a Chimney Adapter Kit number marked on the furnace rating plate.

WARNING

If a clay tile−lined masonry chimney is being used and it is exposed to the outdoors below the roof line, relining might be required. Chimneys shall conform to the Standard for Chimneys, Fireplaces, Vents, and Solid Fuel Burning Appliances ANSI/NFPA 211−2006 in the United States and to a Provincial or Territorial Building Code in Canada (in its absence, the National Building Code of Canada) and must be in good condition.

U.S.A.−Refer to Sections 13.1.9 or 13.2.20 of the NFGC or the au- thority having jurisdiction to determine whether relining is required. If relining is required, use a properly sized listed metal liner, Type−B vent, or a listed alternative venting design.

This model (*8DNL) is NOT listed for use with Chimney Adapter kits. A multi−position furnace in the downflow position that is listed for use with one of the Chimney Adapter Kits NAHA001DH or NAHA002DH may be used with a masonry chimney.

Canada (and U.S.A.)−This furnace is permitted to be vented into a clay tile−lined masonry chimney that is exposed to the outdoors below the roof line, provided:

1. Vent connector is Type−B double−wall, and

2. This furnace is common vented with at least 1 draft hood− equipped appliance, and

3. The combined appliance input rating is less than the maximum capacity given in Table A, and

4. The input rating of each space−heating appliance is greater than the minimum input rating given in Table B for Masonry Chimneys for the local 99% Winter Design Temperature. Chimneys having internal areas greater than 38 square inches (245 sq. cm) require furnace input ratings greater than the input ratings of these furnaces. See footnote at bottom of Table B, and

5. The authority having jurisdiction approves.

If all of these conditions cannot be met, an alternative venting design shall be used, such as a listed chimney−lining system, or a Type−B vent.

Page 14

441 01 2314 06

Specifications are subject to change without notice.

Exterior Masonry Chimney, FAN+NAT Installations with

Type−B Double−Wall Vent Connectors

 NFPA & AGA

Table A-

Combined Appliance

Maximum Input Rating in

Thousands of Btu per Hr

VENT

HEIGHT

FT(m)

INTERNAL AREA OF CHIMNEY

SQ IN.(mm)

12(77.4) 19(122.6) 28(180.6) 38(245.2)

6(1.8) 74 119 178 257 8(2.4) 80 130 193 279

10(3) 84 138 207 299 15(4.6) NR 152 233 334 20(6.1) NR NR 250 368 30(9.1) NR NR NR 404

Table B-

Minimum Allowable Input Rating of

Space-Heating Appliance in

Thousands of Btu per Hr

VENT

HEIGHT

FT(m)

INTERNAL AREA OF CHIMNEY

sq. in(mm)

12(77.4) 19(122.6) 28(180.6) 38(245.2)

17 to 26F (−8 to −3C)

Local 99% Winter Design Temperature:

17 to 26°F (−8 to −3°C)*

6(1.8) 0 55 99 141 8(2.4) 52 74 111 154

10(3) NR 90 125 169

15(4.6) NR NR 167 212

20(6.11) NR NR 212 258

30(9.1) NR NR NR 362

5 t o 16F (−15 to −9C)

Local 99% Winter Design Temperature:

5 to 16°F (−15 to −9°C)*

6(1.8) NR 78 121 166

8(2.4) NR 94 135 182

10(3) NR 111 149 198

15(4.6) NR NR 193 247

20(6.11) NR NR NR 293

30(9.1) NR NR NR 377

−10 to 4F (−23 to −16C)

Local 99% Winter Design Temperature:

−10 to 4°F (−23 to −16°C)*

6(1.8) NR NR 145 196

8(2.4) NR NR 159 213

10(3) NR NR 175 231

15(4.6) NR NR NR 283

20(6.11) NR NR NR 333

30(9.1) NR NR NR NR

−11 °F (−24°C) or lower

Local 99% Winter Design Temperature:

−11°F (−24°C) or lower*

Not recommended for any vent configuration

* The 99% Winter Design Dry−Bulb (db) temperatures are

found in the 2005 ASHRAE Fundamentals Handbook CD

and Chapter 28. Inspections before the sale and at the time of installation will determine the acceptability of the chimney or the need for repair and/or (re)lining. Refer to the Chimney Inspection Chart to perform a chimney inspection. If the inspection of a previously used tile−lined chimney:

a. Shows signs of vent gas condensation, the chimney should

be relined in accordance with local codes and the authority having jurisdiction. The chimney should be relined with a listed metal liner or Type−B vent to reduce condensation. If a condensate drain is required by local code, refer to the NFGC, Section 12.10 for additional information on condensate drains.

b. Indicates the chimney exceeds the maximum permissible

size in the tables, the chimney should be rebuilt or relined to conform to the requirements of the equipment being

installed and the authority having jurisdiction. A chimney without a clay tile liner, which is otherwise in good condition, shall be rebuilt to conform to ANSI/NFPA 211 or be lined with a UL listed (ULC listed in Canada) metal liner or UL listed Type−B vent. Relining with a listed metal liner or Type−B vent is considered to be a vent−in−a−chase. If a metal liner or Type−B vent is used to line a chimney, no other appliance shall be vented into the annular space between the chimney and the metal liner.

APPLIANCE APPLICATION REQUIREMENTS

Appliance operation has a significant impact on the performance of the venting system. If the appliances are sized, installed, adjusted, and operated properly, the venting system and/or the appliances should not suffer from condensation and corrosion. The venting system and all appliances shall be installed in accordance with applicable listings, standards, and codes.

The furnace should be sized to provide 100 percent of the design heating load requirement plus any margin that occurs because of furnace model size capacity increments. Heating load estimates can be made using approved methods available from Air Conditioning Contractors of America (Manual J); American Society of Heating, Refrigerating, and Air−Conditioning Engineers; or other approved engineering methods. Excessive oversizing of the furnace could cause the furnace and/or vent to fail prematurely.

When a metal vent or metal liner is used, the vent or liner must be in good condition and be installed in accordance with the vent or liner manufacturer’s instructions.

To prevent condensation in the furnace and vent system, the following precautions must be observed:

1. The return−air temperature must be at least 60°F(16°C) db except for brief periods of time during warm−up from setback at no lower than 55°F(13°C) db or during initial start− up from a standby condition.

2. Adjust the gas input rate per the installation instructions. Low gas input rate causes low vent gas temperatures, causing condensation and corrosion in the furnace and/or venting system. Derating is permitted only for altitudes above 2000′ (610m).

3. Adjust the air temperature rise to the midpoint of the rise range or slightly above. Low air temperature rise can cause low vent gas temperature and potential for condensation problems.

4. Set the thermostat heat anticipator or cycle rate to reduce short cycling.

Air for combustion must not be contaminated by halogen compounds which include chlorides, fluorides, bromides, and iodides. These compounds are found in many common home products such as detergent, paint, glue, aerosol spray, bleach, cleaning solvent, salt, and air freshener, and can cause corrosion of furnaces and vents. Avoid using such products in the combustion−air supply. Furnace use during construction of the building could cause the furnace to be exposed to halogen compounds, causing premature failure of the furnace or venting system due to corrosion.

Vent dampers on any appliance connected to the common vent can cause condensation and corrosion in the venting system. Do not use vent dampers on appliances common vented with this furnace.

Page 15

441 01 2314 06

Specifications are subject to change without notice.

Chimney is

acceptable for use

Crown

condition:

Missing mortar

or brick?

Rebuild

crown

Is Chimney properly lined with clay tile

liner?

Yes

liner and top

seal in good

condition

Debris in

cleanout? Mortar, tile,

metal vent, fuel oil

residue?

Repair

liner or top seal

or reline chimney as

necessary.

Reline

Yes Repair

Yes

Clay

tile misalignment,

missing sections,

gaps?

Is Chimney

lined with properly

sized, listed liner or

Type-B vent?

Line chimney with properly

sized, listed flexible metal

liner or Type-B vent per NFGC or

NSCNGPIC Vent Sizing Tables

and liner or vent manufacturer's

installation instructions.

CHIMNEY INSPECTION CHART

For additional requirements refer to the National Fuel Gas Code ANSI Z223.1/NFPA 54-2009 and ANSI/NFPA 211-2006 Chimneys, Fire places, Vents, and Solid Fuel Burning Appliances in the U.S.A. or to the Canadian Installation Code CSA B149.1-05 in Canada.

Yes

Mortar or

tile debris?

Yes

Remove mortar

and tile debris?

Remove metal vent or liner.

Consult

Part B of chimney

adapter venting

instructions for

application

suitability.

Chimney

exposed to outdoors

below roof line?

Is Chimney to

be dedicated to a

single furnace?

Yes

Install chimney

adapter per instructions.

Not Suitable

Suitable

Consult

Part C of chimney

adapter venting

instructions for

application

suitability.

Suitable

Install chimney

adapter per

instructions.

Condensate

drainage at bottom

of chimney?

Yes

Figure 6

Page 16

441 01 2314 06

Specifications are subject to change without notice.

7. Gas Supply and Piping

CARBON MONOXIDE POISONING, FIRE AND EXPLOSION HAZARD

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

Models designated for Natural Gas are to be used with Natural Gas ONLY, unless properly converted to use with Propane gas.

WARNING

Gas Supply Requirements

• Use only the Type of gas approved for this furnace. See rating

plate for approved gas type.

• Gas input must not exceed the rated input shown on the rating

plate. Overfiring will result in failure of heat exchanger and cause dangerous operation.

• Do not allow minimum supply pressure to vary downward. Do-

ing so will decrease input to furnace. Refer to Table 3 for gas supply. Refer to Table 5 or Table 6 for manifold pressures.

Table 3 Gas Pressures

Gas Type

Supply Pressure

Recommended Max. Min.

Natural

7 in wc

(1744 Pa)

14 in wc

(3487 Pa)

4.5 in wc

(1121 Pa)

Propane

11 in wc

(2740 Pa)

14 in wc

(3487 Pa)

11 in wc

(2740 Pa)

Gas Piping Requirements

NOTE: The gas supply line must be installed by a qualified service technician in accordance with all building codes.

NOTE: In the state of Massachusetts.

a. Gas supply connections MUST be performed by a li-

censed plumber or gas fitter).

b. When flexible connectors are used, the maximum length

shall not exceed 36″(914.4mm).

c. When lever handle type manual equipment shutoff valves

are used, they shall be T−handle valves.

d. The use of copper tubing for gas piping is NOT approved.

1. Install gas piping in accordance with local codes, or in the absence of local codes, the applicable national codes.

2. It is recommended that a manual equipment shutoff valve be installed in the gas supply line outside the furnace. Locate valve as close to the furnace as possible where it is readily accessible. Refer to Figure 7.

FIRE HAZARD Failure to follow this warning could result in

personal injury, death and/or property damage. Use wrench to hold furnace gas control valve when

turning elbows and gas line to prevent damage to the gas control valve and furnace.

WARNING

Figure 7

Typical Gas Piping (*8DNL)

Manual Gas Shutoff Valve

Elbows & short nipples

Gas control valve

union

Drip leg & pipe cap

Listed Flexible Gas Appliance Connector if allowed. See NOTE.

25−25−17

3. Use black iron or steel pipe and fittings or other pipe approved by local code.

4. Use pipe thread compound which is resistant to natural and Propane gases.

5. Use ground joint unions and install a drip leg no less than 3″ (76.2mm) long to trap dirt and moisture before it can enter gas control valve inside furnace.

6. Provide a

/8″ NPT plugged tapping for test gauge connection

immediately up stream of gas supply connection to furnace.

7. Use two pipe wrenches when making connections to prevent gas valve from turning.

NOTE: If local codes allow the use of a flexible gas appliance connector, always use a new listed connector. Do not use a connector which has previously served another gas appliance.

8. Flexible corrugated metal gas connector may NOT be used inside the furnace or be secured or supported by the furnace or ductwork.

9. Properly size gas pipe to handle combined appliance load or run gas pipe directly from gas meter or Propane gas regulator.

10. Install correct pipe size for run length and furnace rating.

11. Measure pipe length from gas meter or Propane second stage regulator to determine gas pipe size.

Left Side Gas Supply Piping

Gas line can be installed directly to the gas valve through the hole provided in the left side of the cabinet. See Figure 7

Right Side Gas Supply Piping

Two(2) 90° street elbows or two(2) 90° standard elbows and two(2) close nipples are required for right side gas supply. See

Figure 7.

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Piping with Street Elbows

1. Assemble the elbows so that the outlet of one(1) elbow is 90° from the inlet of the other. The elbows should be tight enough to be leak proof. An additional

turn will be required at the

end of step 2, see Figure 8.

2. Screw elbow assembly into gas valve far enough to be leak proof. Position elbow assembly so that the inlet of the elbow is at the bottom of the gas valve. An additional

/2 turn will be required in step 3. Turn open end of inlet elbow to face the right side of the furnace (

/4 turn), see Figure 9.

3. Turn assembly an additional

turn to position inlet near the top of the gas valve and in line with gas opening on right side of furnace, see Figure 7 and Figure 10.

Figure 8

25−23−23c

Elbows (*8DNL)

Figure 9

Gas Valve with Elbows (*8DNL)

Representative drawing only, some models may vary in appearance.

Figure 10

Gas Valve with Elbows (*8DNL)

Representative drawing only, some models may vary in appearance.

4. Gas supply line then can be run directly into opening of elbow.

Piping with Close Nipples and Standard Elbows

1. Assemble elbows and nipples similar to street elbows shown in Figure 8.

2. Follow steps 2 through 4 Piping with Street Elbows.

FIRE OR EXPLOSION HAZARD Failure to follow this warning could result in

personal injury, death and/or property damage. A flexible corrugated metal gas connector must be

properly installed, shall not extend through the side of the furnace, and shall not be used inside the furnace.

Black iron pipe shall be installed at the furnace gas control valve and extend a minimum of 2 (50.8mm) outside furnace.

WARNING

Additional Propane Piping Requirements

• Have a licensed Propane gas dealer make all connections at

storage tank and check all connections from tank to furnace.

• If copper tubing is used, it MUST comply with limitation set in

local codes, or in the absence of local codes, the gas codes of the country having jurisdiction.

• Two−stage regulation of Propane gas is recommended.

FIRE OR EXPLOSION HAZARD Failure to follow this warning could result in

personal injury, death and/or property damage. A natural gas or Propane gas leak ignited by an

open flame or spark could result in personal injury, death and/or property damage.

Natural gas is lighter than air and will rise. Propane gas is heavier than air and will settle and remain in low areas and open depressions.

Thoroughly ventilate area and dissipate gas. Do NOT use a match or open flame to test for leaks, or attempt to start up furnace before thoroughly ventilating area.

WARNING

Final Check

• Test all pipes for leaks.

• If orifices were changed, make sure they are checked for

leaks.

• During pressure testing of gas supply piping system:

a. If test pressure does not exceed

/2 psi (24 pa), isolate the furnace from the gas supply piping system by closing the equipment shutoff valve.

b. If test pressure exceeds

/2 psi (24 pa), the furnace and its

manual equipment shutoff valve must be disconnected

from the gas supply piping system.

• To check for leaks apply soap suds or a liquid detergent to

each joint. Bubbles forming indicate a leak.

• Do not use an open flame to test for gas leaks. Fire or explo-

sion could occur.

• Correct even the smallest leak at once.

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8. Electrical Wiring

ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in

personal injury or death. Turn OFF electrical power at fuse box or service

panel, lockout and tag with a suitable warning label, before making any electrical connections and ensure a proper ground connection is made before connecting line voltage.

WARNING

Power Supply Wiring

The furnace MUST be electrically wired and grounded in accor- dance with local codes, or in the absence of local codes, with the National Electrical Code (NEC), ANSI/NFPA 70−2005 in the U.S., or the Canadian Electrical Code (CEC), CSA C22.1 in Canada.

The power supply to the furnace connections must be between 104 VAC and 127 VAC during furnace operation for acceptable performance.

Field wiring connections must be made inside the furnace connection box. A suitable strain relief should be used at the point the wires exit the furnace casing.

Copper conductors shall be used. Line voltage wires should conform to temperature limitation of 35° C rise. Wire and circuit breaker sizing shall be based on the ampacity of the furnace electrical components plus the amps for all installed accessories (1.0 amps total for EAC and HUM). Ampacity can be determined by using the NEC or CEC.

NOTE: Furnace will not have normal operation is line polarity is reversed. Check ALL field and control connections prior to operation.

Furnace must be installed so the electrical components are protected from water and connected to its own separate circuit.

Junction Box (J-Box) Relocation

The J−Box is installed on left side of casing. An alternate J−Box location on right side can be used.

1. Remove bag containing two hole plugs and two self−tapping screws from loose parts bag in blower compartment.

2. Remove and discard two screws holding J−Box to casing.

3. Move large hole plug from right to left J−Box location.

4. Move J−Box to alternate location and attach using two self− tapping screws from bag.

5. A wire tie may need to be cut for additional wire length.

6. Apply two hole plugs from bag at left J−Box location.

7. Position all wires away from sharp edges and moving parts. Do not pinch J−Box or other wires when reinstalling blower compartment door.

Thermostat

Thermostat location has an important effect on the operation of the furnace. Follow instructions included with thermostat for correct mounting and wiring.

Low voltage connections to furnace must be made on terminal board of furnace control. (See Figure 11)

If cooling is used, the Y from the thermostat must be connected to the control Y to energize cooling blower speed.

When using a nonelectronic thermostat, the thermostat heat anticipator must be set to match the amp draw of the electrical components in R−W circuit. Accurate amp draw readings can be obtained at thermostat subbase terminals R and W. For an electronic thermostat, set cycle rate for 3 cycles per hour.

Measure heat anticipator current in series from R to W at the thermostat. If 24VAC humidifier is wired up to control, humidifier must be energized. Allow furnace to operate for two minutes before recording the AC amperage reading. Set anticipator on thermostat to recorded value.

Optional Equipment

All wiring from furnace to optional equipment MUST conform to local codes or, in the absence of local codes, the applicable national codes. Install wiring in accordance with manufacturer’s instructions.

Humidifier/Electronic Air Cleaner

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

REDUCED FURNACE LIFE HAZARD

Failure to follow this caution may result in reduced furnace life.

Do NOT exceed 115V/1.0 amp. maximum current load for both the EAC terminal and the HUM terminal combined.

CAUTION

HUMIDIFIER − The HUM (115VAC) is energized when the pressure switch closes on a call for heat. The HUM is energized when the inducer is energized.

ELECTRONIC AIR CLEANER − EAC is energized when there is a blower speed call, except is NOT energized when blower operates in the hard−wired continuous fan mode.

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441 01 2314 06

Specifications are subject to change without notice.

Figure 11

Electrical Connections

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

* Permissible limits of voltage at which unit will operate satisfactorily

115V. 60Hz.

HOT

NEUT.

Connection

BOX

Ground

Thermostat

25-25-13

Low Voltage Terminal Board

Furnace Control

The furnace control is preset at the factory with ON delay of 30 seconds in the heating mode. The blower OFF timing is preset at 140 seconds. If desired, the fan OFF delay can be reset to obtain the longest delay times while still maintaining comfort levels. See “Furnace Wiring Diagram”.

Furnace Control Fuse

The 24V circuit contains a 5−amp, automotive−type fuse located on furnace control. (See Figure 12) Any electrical shorts of 24V wiring during installation, service, or maintenance may cause fuse to blow. If fuse replacement is required, use only a fuse of identical size (5 amp.).

FUSE

25-24-98

Diagnostic Light

Jumper

24 VAC HUM

115 VAC HUM

Control Connections

Figure 12

9. Ductwork and Filter

CARBON MONOXIDE POISONING HAZARD

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

Do NOT draw return air from inside a closet or utility room where furnace is located. Return air duct MUST be sealed to furnace casing.

WARNING

FIRE HAZARD Failure to follow this warning could result in

personal injury, death and/or property damage. Place furnace on noncombustible subbase on

downflow applications, unless installing on non−combustible flooring.

WARNING

Duct Connections

This furnace may be installed in only a top return−air application. Return air duct connection through the side(s) or back of the furnace is NOT permitted. Supply duct connection is permitted to ONLY the bottom of the furnace.

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441 01 2314 06

Specifications are subject to change without notice.

Duct Design

Design and install the air distribution system to comply with Air Conditioning Contractors of America manuals or other approved methods that conform to local codes and good trade practices.

When the furnace is located in an area near or adjacent to the living area, the system should be carefully designed with returns to mini-

mize noise transmission through the

supply and return air grilles.

Any blower moving a high volume of air will produce audible noise

which could be objectionable when the unit is located very close to a living area. It is often advisable to route the supply air ducts under the floor and return air ducts through the attic.

• Refer to furnace Technical Support Manual (Blower Data) for

airflow information.

• Size ductwork to handle airflow for heating and air conditioning

if used.

Duct Installation Requirements

• When a furnace is installed so that supply ducts carry air circu-

lated by the furnace to areas outside of the space containing the furnace, the return air shall also be handled by duct(s) sealed to the furnace casing and terminating outside the space containing the furnace.

CARBON MONOXIDE POISONING HAZARD

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

Install cooling coil on furnace discharge. Cool air passing over heat exchanger could cause condensate to form resulting in heat exchanger failure.

WARNING

• When the furnace is used with a cooling unit, the furnace shall

be installed parallel with or on the upstream side of the cooling unit to avoid condensation in the heating element.

• With a parallel flow arrangement, the dampers or other means

used to control flow of air shall be adequate to prevent chilled air from entering the furnace. Chilled air going through the furnace could cause condensation and shorten furnace life. Dampers (purchased locally) can be either automatic or manual. Manually or automatically operated dampers MUST be equipped with a means to prevent furnace or air conditioning operation, unless damper is in the full heat or cool position

• Installation of locking−type dampers is recommended in all

branches, or in individual ducts to balance system’s air flows.

• Non−combustible, flexible duct connectors are recommended

for return and supply connections to furnace.

• If air return grille is located close to the fan inlet, install at least

one, 90° air turn between fan and inlet grille to reduce noise.

• Ductwork installed in attic, or exposed to outside temperatures

requires a minimum of 2″ (50.8mm) of insulation with outdoor type vapor barrier.

• Ductwork installed in an indoor unconditioned space requires

a minimum of 1″ (25.4mm) of insulation with indoor type vapor barrier.

Inspection Panel on Some Models

For a furnace not equipped with a cooling coil, the outlet duct shall be provided with a removable access panel. This opening shall be accessible when the furnace is installed and shall be of such a size that the heat exchanger can be viewed for possible openings using light assistance or a probe can be inserted for sampling the air stream. This access cover shall be attached in such a manner as to prevent air leaks.

Sub-Bases for Combustible Floors - Furnace Only

The Subbase for Combustible Floors MUST be used when a downflow furnace is set on a combustible floor, even when the furnace is installed on a coil box.

NOTE: Supply opening is 3

/8″ (98.4mm) from the rear of the fur-

nace. Therefore maintain a 3

/8″ (98.4mm) clearance from a wall

behind the furnace (where applicable).

1. Cut the opening in the floor according to the dimensions in Table 4 because the base is equipped with locating tabs that center the base over the opening.

The opening in the base is 1

/4″ (31.75mm) shorter and 11/8″ (28.58mm) narrower than the minimum required size of the opening in the floor. This is done to maintain a 1″ (25.4mm) clearance between the floor and the plenum.

2. Fabricate the plenum to the dimensions given in Table 4. Note that the dimensions given are outside dimensions.

3. Set the base over the opening in the floor, centering the opening in the base over the opening in the floor. Fasten the base to the floor with screws or nails. See Figure 13 and Figure 14.

4. Drop the plenum through the opening in the base. The flange of the plenum should rest on top of the combustible floor base.

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441 01 2314 06

Specifications are subject to change without notice.

Table 4 Sub−bases for Combustible Floors Dimensions − in(mm)

Sub−base for

Combustible

Floors

Part Number

Sub−base for Combustible

Floor Dimensions

Opening In Floor

Opening In

Base For Plenum

Typical Plenum

Dimensions

J* K** L M N P R S T

Subbase for Furnace Only

NAHH001SB 1511/

(398.5) 283/4 (730.3) 149/16 (369.9) 16(406.4) 161/4 (412.8) 145/8 (371.5) 15 (381) 131/2 (342.9) 15 (381) 131/2 (342.9)

NAHH002SB 195/16 (490.5) 283/4 (730.3) 183/16 (462) 16(406.4) 161/

(412.8) 181/4 (463.6) 15 (381) 171/8 (435.6) 15 (381) 171/8 (435.6)

NAHH003SB 2215/16 (582.6) 283/4 (730.3) 2113/16 (554) 16(406.4) 161/

(412.8) 217/8 (555.6) 15 (381) 193/4 (501.7) 15 (381) 193/4 (501.7)

NAHH010SB 2411/

(627) 283/

(730.3) 239/

(598.5) 16(406.4) 161/

(412.8) 235/8(600) 15 (381) 221/

(571.5) 15 (381) 221/

(571.5)

Subbase for Coil Box

NAHH004SB 153/4 (25.4) 209/16 (522.3) 149/16 (369.9)

161/

(408)

161/4 (412.8) 145/8 (371.5) 15 (381) 131/2 (342.9) 15 (381) 131/

2 (

342.9)

NAHH005SB 193/8 (181.1) 209/

(522.3) 183/16 (462)

161/

(408)

161/

(412.8) 181/

(463.6) 15 (381) 171/8 (435.6) 15 (381) 171/

(435.6)

NAHH006SB 23 (284.2) 209/

(522.3) 2113/16 (554)

161/

(408)

161/

(412.8) 217/

(555.6) 15 (381) 193/4 (501.7) 15 (381) 193/

(501.7)

NAHH009SB 243/

(628.7) 209/

(522.3) 239/

(598.5)

161/

(408)

161/4 (412.8) 235/8(600) 15 (381) 221/

(571.5) 15 (381) 221/

(571.5)

Outside Dimension

Base Spacer Side To Side

Figure 13

Exploded View of Sub−Base for Furnace ONLY

1”

P L

25−21−46

Plenum

Hole In Floor

Combustible

Floor Base

2”

4-1/4″ (108mm) MIN. DISTANCE FROM BACK EDGE OF HOLE IN FLOOR TO NEAREST OBSTRUCTION

(50.8mm)

(25.4mm)

Furnace/Coil Box

Subbase Insulation

Wood Screw

Wood Floor

Plenum

25-20-46A

Setting the Base

Figure 14

Figure 15

Exploded View of Base for Downflow Cased Coil

25-21-65n

21/

″

11/

″

Plenum

(63.5mm)

(38.1mm)

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Specifications are subject to change without notice.

Sub-base for Combustible Floors- Downflow Coil Adapter Box

The subbase for combustible floors is required when a downflow furnace, used with a downflow coil box, is set on combustible flooring.

NOTE: Supply opening is 3

/8″ (98.4mm) from the rear of the fur-

nace. Therefore maintain a 3

/8″ (98.4mm) clearance from wall

(where applicable).

1. Cut the opening in the floor according to the dimensions in Table 4 because the base is equipped with locating tabs that center the base over the opening.

The opening in the base is 1

/4″ (31.75mm) shorter and 11/8″ (28.6mm) narrower than the minimum required size of the opening in the floor. This is done to maintain a 1″ (25.4mm) clearance between the floor and the plenum.

2. Fabricate the plenum to the dimensions in Table 4. Note that the dimensions given are outside dimensions.

3. Set the base over the opening in the floor, centering the opening in the base over the opening in the floor. Fasten the base to the floor with screws or nails. See Figure 14 and Figure 15.

4. Drop the plenum through the opening in the base. The flange of the plenum should rest on top of the combustible floor base.

Consideration must be given to the height of the base to allow for easy installation of the condensate drain. See Figure 16. This subbase for combustible floors has been designed so that the height of the subbase raises the downflow coil off the floor to allow easy installation of the condensate drain.

25−20−52

Condensate Line Raised by Base

Figure 16

Non-Combustible Floor:

Set the furnace over the opening in the floor. If necessary, grout around the base to seal air leaks between the base and the floor.

Filters:

A filter MUST be used.

The 18

/4″ X 153/4″ (463.5 x 400.1mm) framed high−velocity filters supplied with the furnace may be installed in the return air plenum above the furnace. A filter rack is supplied with each furnace. See

Figure 17.

Use either filter type:

• Washable, high−velocity filters are based on a maximum air

flow rating of 600 FPM (3.0 m/s).

• Disposable, low velocity filters are based on a maximum air

flow of 300 FPM (1.5 m/s) when used with external filter grille.

• See Circulation Air Blower Data for additional information.

REDUCED FURNACE LIFE HAZARD Failure to follow this caution may result in reduced

furnace life. Use of excessively dirty and/or restrictive air filters

may increase furnace operating temperatures and shorten the life of the furnace.

Filters supplied with the furnace are rated at a maximum of 600 FPM (3.0 m/s) air velocity and sized for the furnace’s airflow rate. Replacement filters must be of equivalent type, size, and rating except as described below.

Disposable, low−velocity filters may be used to replace washable, high−velocity filters, providing they are sized for 300 FPM (1.5 m/s) or less.

CAUTION

Figure 17

Filter Rack Installation

25-25-14a

Version “A”

factory−attached to the top of the blower housing

Version “B”

factory−supplied but field installed

NOTE: The return air plenum MUST extend a sufficient height above the furnace (dimension “A” in Figure 18) to provide for the attachment of a return air duct or grille above the filters.

NOTE: Plenum must be fitted as close to the return air flange of the furnace as possible to eliminate any air bypassing the filters.

Filters can only be installed through the right hand side of the furnace blower opening. Slide filter into furnace until it is in position to be pushed up and over into place on the left hand side of furnace. See Figure 18.

Slide remaining filter into furnace and up into place on right hand side of furnace. See Figure 18.

If there is insufficient plenum height for this type of installation, filters may be installed in any accessible location in the return air system. In such a case, the filters should be of equivalent size and style as originally supplied with the furnace.

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441 01 2314 06

Specifications are subject to change without notice.

The redesigned filter bracket needs to be centered on top of the flanges spanning the depth of the flange opening. Position it so the “V” portion is between the inner sides of the flanges with the flat tabs are resting on top of the flange edges. The tabs can then be bent over the flanges on both ends by hand or by tapping lightly with a hammer to secure the bracket to the top of the furnace. (see Figure 17)

No further attachment is necessary. Once the plenum is attached to the top of the furnace the bracket will not move. The bracket will look like Figure 17 after being formed onto the flanges.

Filter Removal

1. Remove blower compartment door.

2. Reach up above right side of blower and lift dirty filters out of

rack at top of furnace.

16″

“A”

Figure 18

Filter Installation

14″

“A”

25-25-14

Version “A”

Version “B”

(355.6mm)

(406.4mm)

3. Straighten up filters and pull straight down at side of blower. Pull out through right door opening.

4. Vacuum clean or wash with warm water and dry thoroughly before replacing.

NOTE: If filters are only suitable for heating application, advise homeowner that filter size may need to be increased if air conditioning is added.

Addition Of Air Conditioning

When a refrigeration coil is used in conjunction with this furnace, it must be installed on the discharge side of the furnace to avoid condensation on the heat exchanger. All furnaces are designed with a break−away duct flange on the supply air side of the furnace. This allows for installation in the horizontal right or downflow applications. The coil installation instructions must be consulted for proper coil location and installation procedures. With a parallel flow arrangement, dampers must be installed to prevent chilled air from entering the furnace. If manually operated dampers are used, they must be equipped with a means to prevent operation of either unit unless the damper is in full heat or full cool position.

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

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10. Checks and Adjustments

Startup

NOTE: Refer to startup procedures in the Users Information Manual.

ELECTRICAL SHOCK, FIRE, OR EXPLOSION HAZARD

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

If any sparks, odors or unusual noises occur, immediately shut OFF gas and power to furnace. Check for wiring errors or obstruction to blower.

WARNING

Gas Supply Pressure

Gas supply pressure should be within minimum and maximum values listed on rating plate. Pressures are usually set by gas suppliers.

(See Propane Gas Conversion Kit instruction manual for furnaces converted to Propane gas)

Manifold Gas Pressure Adjustment

NOTE: Make adjustment to manifold pressure with burners operating.

FIRE OR EXPLOSION HAZARD Failure to follow this warning could result in personal

injury, death and/or property damage. Turn OFF gas at shut off before connecting

manometer.

WARNING

1. With gas OFF, connect manometer to manifold pressure tap on outlet of gas control valve. See Figure 19. Use a manometer with a 0 to 12 in wc (0 to 3014 Pa) range.

2. Turn gas ON. Operate the furnace by using a jumper wire on the R to W thermostat connections on the control.

3. Remove manifold pressure adjustment screw cap on furnace gas control valve. Turn adjusting screw using 3/32 hex wrench, counterclockwise to decrease manifold pressure and clockwise to increase pressure. See Figure 19.

NOTE: Adjustment screw cover MUST be replaced on gas control valve before reading manifold pressure and operating furnace.

4. Set manifold pressure to value shown in Table 5 or Table 6.

5. When the manifold pressure is properly set, replace the adjustment screw cover on the gas valve.

6. Remove jumper wire from thermostat connection on control. Remove manometer connection from manifold pressure tap, and replace plug in gas valve.

7. Check for leaks at plug.

Typical Gas Control Valve

Figure 19

Regulator Adjustment Under Cap

Inlet Pressure Ta p 1/8 NPT

INLET

OUTLET

Outlet Pressure Tap

/8 NPT

OFF

HONEYWELL

(3.2mm)

Natural Gas Input Rating Check

The gas meter can be used to measure input to furnace.

Check with gas supplier for actual BTU content.

1. Turn OFF gas supply to all appliances other than furnace and start furnace. Use jumper wire on R to W.

2. Time how many seconds it takes the smallest dial on the gas meter to make one complete revolution.

Note: If meter uses a 2 cubic foot dial, divide results (seconds) by two.

Refer to Example. The Example is based on a natural gas BTU content of 1,000 BTU’s per cubic foot.

Example (BTUH)

Natural Gas

BTU Content

per cu. foot

No. of Seconds

Per Hour

Time Per Cubic

Foot in

Seconds

BTU Per

Hour

1,000 3,600 48 75,000

1,000 x 3,600 ÷ 48 = 75,000 BTUH

To Determine the appliance kW input rate from a .05m

test dial

that has been clocked at 80 seconds for one complete revolution.

Example (kW)

Number of

seconds per

hour

Number of

seconds per

complete

rotation

Size of test dial

(.05m

)

kW m3/h

3,600 80 .05 2.25

3,600 ÷ 80 x .05 = 7.2 m3/h

2.25m3/h x 10.35 kWh/m

= 23.28 kW

23.28 x 3.412 = 79,431 BTU

3. Remove jumper wire from R to W.

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

Orifice Sizing

NOTE: Factory sized orifices for natural and Propane gas are listed in the furnace Technical Support Manual.

Ensure furnace is equipped with the correct main burner orifices. Refer to Table 5 or Table 6 for correct orifice size and manifold pressure for a given heating value and specific gravity for natural and propane gas.

Operation Above 2000′ (610m) Altitude

These furnace may be used at full input rating when installed at altitudes up to 2000′ (610m). When installed above 2000′ (610m), the input must be decreased 2% (natural gas) or 4% (Propane gas) for each 1000′ (305m) above sea level in the USA. In Canada,

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441 01 2314 06

Specifications are subject to change without notice.

the input rating must be derated 5% (natural) or 10% (Propane) for each 1000′ (305m) above sea level. This may be accomplished by a simple adjustment of manifold pressure or an orifice change, or a combination of a pressure adjustment and an orifice change. The changes required depend on the installation altitude and the heating value of the fuel. Table 5 & Table 6 show the proper furnace manifold pressure and gas orifice size to achieve proper performance based on elevation above sea level for both natural gas and propane gas.

To use the natural gas table, first consult your local gas utility for the heating value of the gas supply. Select the heating value in the first column and follow across the table until the appropriate elevation for the installation is reached. The value in the box at the intersection of the altitude and heating value provides not only the manifold pressure but also the orifice size. In the natural gas tables, the factory−shipped orifice size is in bold (42). Other sizes must be obtained from service parts.

High Altitude Input Rate =

Nameplate Sea Level Input Rate x (Multiplier) [USA]

Elevation

ft (m)

High Altitude Multiplier

Natural Gas Propane Gas

2001′ - 3000′

(610 − 914)

0.95 0.90

3001′ - 4000′

(915 − 1219)

0.93 0.86

4001′ - 5000′

(1220 − 1524)

0.91 0.82

5001′ - 6000′

(1524 − 1829)

0.89 0.78

6001′ - 7000′

(1829 − 2134)

0.87 0.74

7001′ - 8000′

(2134 − 2438)

0.85 0.70

* Based on mid−range of elevation.

FIRE, EXPLOSION, CARBON MONOXIDE POISONING HAZARD

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

This high−altitude gas−conversion shall be done by a qualified service agency in accordance with the Manufacturer’s instructions and all applicable codes and requirements, or in the absence of local codes, the applicable national codes.

WARNING

MANIFOLD PRESSURE AND ORIFICE SIZE FOR HIGH ALTITUDE APPLICATIONS

Table 5 NATURAL GAS MANIFOLD PRESSURE (in wc)

HEATING

VALUE

at ALTITUDE

BTU/CU. FT.

MEAN ELEVATION ABOVE SEA LEVEL − ft(m)

0 to 2000

(0 to 610)

2001 to 3000*

(610 to 914)*

3001 to 4000

(915 to 1219)

4001 to 5000

(1220 to 1524)

5001 to 6000

(1524 to 1829)

6001 to 7000

(1829 to 2134)

7001 to 8000

(2134 to 2438)

Orifice

No.

Manifold

Pressure

Orifice

No.

Manifold Pressure

Orifice

No.

Manifold Pressure

Orifice

No.

Manifold

Pressure

Orifice

No.

Manifold

Pressure

Orifice

No.

Manifold

Pressure

Orifice

No.

Manifold Pressure

700 −− −− −− −− −− −− −− −− −− −− −− −− 41 3.7

725 −− −− −− −− −− −− −− −− −− −− 41 3.7 41 3.4

750 −− −− −− −− −− −− −− −− −− −− 41 3.5 42 3.6

775 −− −− −− −− −− −− −− −− 41 3.6 42 3.6 42 3.3

800 −− −− −− −− −− −− −− −− 42 3.7 42 3.4 42 3.1

825 −− −− −− −− 41 3.7 41 3.6 42 3.5 42 3.2 42 2.9

850 −− −− −− −− 41 3.5 41 3.4 42 3.3 42 3.0 42 2.8

875 −− −− 41 3.6 42 3.6 42 3.4 42 3.1 42 2.8 42 2.6

900 −− −− 42 3.7 42 3.4 42 3.2 42 2.9 42 2.7 42 2.5

925 41 3.7 42 3.5 42 3.3 42 3.0 42 2.8 42 2.5 44 3.3

950 41 3.5 42 3.3 42 3.1 42 2.9 42 2.6 42 2.4 44 3.1

975 42 3.7 42 3.2 42 2.9 42 2.7 42 2.5 44 3.2 45 3.6

1000 42 3.5 42 3.0 42 2.8 42 2.6 42 2.4 45 3.7 45 3.4

1050 42 3.2 42 2.7 42 2.5 44 3.3 45 3.6 −− −− −− −−

1100 43 3.6 42 2.5 44 3.2 45 3.6 −− −− −− −− −− −−

Conversion: 1 in wc = 249 Pa

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

54−2009 or National Standard of Canada, Natural Gas And Propane Installation Code CSA B149.1−05.

* In the USA, derating of these furnaces at 2% (Natural Gas) and 4% (Propane Gas) has been tested and design−certified by CSA.

In Canada, the input rating must be derated 5% (Natural Gas) and 10% (Propane Gas) for altitudes of 2,000 to 4,500 (610 to 1372m) above sea level. Use the 2001 to 3000 (610 to 914m) column in Table 5 and Table 6.

Page 26

441 01 2314 06

Specifications are subject to change without notice.

Table 6 PROPANE GAS MANIFOLD PRESSURE (in wc)

HEATING VALUE

at ALTITUDE

BTU/CU. FT.

MEAN ELEVATION ABOVE SEA LEVEL − ft(m)

0 to 2000

(0 to 610)

2001 to 3000*

(610 to 914)*

3001 to 4000

(915 to 1219)

4001 to 5000

(1220 to 1524)

5001 to 6000

(1524 to 1829)

6001 to 7000

(1829 to 2134)

7001 to 8000

(2134 to 2438)

2500 10.0 10.0 9.0 10.0 9.4 8.5 10.0

Orifice Size #54 #54 #54 #55 #55 #55 #56

Conversion: 1 in wc = 249 Pa

NOTE: Propane data is based on 1.53 specific gravity. For fuels with different specific gravity consult the National Fuel Gas Code ANSI Z223.1/NFPA

54−2009 or National Standard Of Canada, Natural Gas And Propane Installation Code CSA B149.1−05.

* In the USA, derating of these furnaces at 2% (Natural Gas) and 4% (Propane Gas) has been tested and design−certified by CSA.

In Canada, the input rating must be derated 5% (Natural Gas) and 10% (Propane Gas) for altitudes of 2,000 to 4,500 (610 to

1372m) above sea level. Use the 2001 to 3000 (610 to 914m) column in Table 5 and Table 6. The burner orifice part nos. are as follows: Orifice #41 1096942 Orifice #42 1011351 Orifice #43 1011377 Orifice #44 1011352 Orifice #45 1011353 Orifice #54 1011376 Orifice #55 1011354 Orifice #56 1011355

High Altitude Air Pressure Switch

The factory−installed pressure switch need NOT be changed for any furnace installations from sea level up to and including 8,000′ (2438m) altitude. See service parts for use above 8,000′ (2438m) altitude.

Changing Orifices

1. After disconnecting power and gas supply to the furnace, re-

move the burner compartment door, exposing the burner compartment.

2. Disconnect gas line from gas control valve so manifold can be

removed.

3. Disconnect wiring at gas control valve. Be sure to note the

proper location of all electrical wiring before being disconnected.

4. Remove the four (4) screws holding the manifold and gas con-

trol valve to the manifold supports. Do not discard any screws. See Figure 20.

5. Carefully remove the manifold assembly.

Figure 20

Manifold

25-25-15

Representative drawing only, some models may vary in appearance.

6. Remove the orifices from the manifold and replace them with

proper sized orifices. See Figure 21.

7. Tighten orifices so they are seated and gas−tight. See

Figure 21.

Figure 21

Clearances

Measure from face of orifice to the back side of the manifold.

1.11″ (28.2mm)

1.21″ (30.7mm)

8. Reassemble all parts in reverse order as removed. Be sure to engage the main burner orifices in the proper openings in the burners.

9. After reassembling, turn gas on and check all joints for gas leaks using a soapy solution. All leaks must be repaired immediately.

Propane Conversion

An accessory kit shall be used to convert to propane gas use, see the furnace rating plate for the Propane conversion accessory kit part number.

CARBON MONOXIDE POISONING HAZARD

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

NOx inserts for use with Natural Gas units ONLY. If Propane Gas is required, NOx inserts must be removed.

WARNING

FIRE, EXPLOSION, UNIT DAMAGE HAZARD

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

A Propane conversion accessory kit is required when operating the furnace with Propane gas.

WARNING

For Propane conversion remove screws that secure the NOx insert and discard insert.

Reinstall screws. See Figure 22

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441 01 2314 06

Specifications are subject to change without notice.

NOTE: It is very important to reinstall the NOx insert mounting screws.

Figure 22

Removing NOx inserts

Representative drawing only, some models may vary in appearance.

Main Burner Flame Check

Allow the furnace to run approximately 10 minutes. Then inspect the main burner and pilot flames. See Figure 23.

Check for the following (Figure 23):

• Stable and blue flames. Dust may cause orange tips or wisps

of yellow, but flames MUST NOT have solid, yellow tips.

• Flames extending directly from burner into heat exchanger.

• Flames do NOT touch sides of heat exchanger

If any problems with main burner flames are noted, it may be necessary to adjust manifold gas pressure, or check for drafts.

Main Burner

Burner Face

10−10−78

Figure 23

NOTE: For Ignitor location see Figure 24.

Ignitor Location in (mm)

Figure 24

/16(8)

/4(6.4)

(52.4)

25-25-08

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

Air Temperature Rise Check

REDUCED FURNACE LIFE HAZARD Failure to follow this caution may result in reduced

furnace life.

Use ONLY the blower motor speed taps insert indicated in the Circulation Air Blower Data for setting air temperature rise.

CAUTION

The blower speed MUST be set to give the correct air temperature rise through the furnace as marked on the rating plate. Temperature rise is the difference between supply and return air temperatures.

To check temperature rise, use the following procedure:

1. Place thermometers in supply and return air registers as close

to furnace as possible, avoiding direct radiant heat from heat exchangers.

2. Operate furnace for 10 minutes with all the registers and duct

dampers open by using a jumper wire on R to W thermostat connections on the control board.

3. Take readings and compare with range specified on rating

plate.

4. If the air temperature rise is not in the correct range, the blow-

er speed must be changed. A higher blower speed will lower the temperature rise. A lower blower speed will increase the temperature rise.

5. Remove the jumper wire after the adjustments are complete.

Changing Blower Speed

ELECTRICAL SHOCK HAZARD

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

Turn OFF power to furnace, lockout and tag with a suitable warning label, before changing speed taps.

WARNING

NOTE: The speed taps that the manufacturer sets at the factory

for this furnace are based on a nominal 400 CFM per ton cooling and the basic mid range on the temperature rise for heating.

Since the manufacturer cannot predict the static pressure that will be applied to the furnace, it is the responsibility of the installer dealer/contractor to select the proper speed tap leads for the application when the furnace is installed.

If it is necessary to change speeds, refer to steps below.

1. Refer to Furnace Wiring Diagram for location of the heating

and cooling speed taps located on the furnace control as well as location of unused blower motor speed leads. Use the chart (Table 7) to determine the blower motor speed settings.

Table 7 Blower Speed Chart

Wire Color Motor Speed

Black High

Orange* Med−High

Blue Med−Low

Red Low

* Med−High speed may not be provided on all models.

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441 01 2314 06

Specifications are subject to change without notice.

2. Change the heat or cool blower motor speed by removing the motor speed lead from the “Heat” or “Cool” terminal and re- place it with the desired motor speed lead from the “M1” or “M2” location. Connect the wire previously removed from the “Heat” or “Cool” terminal to the vacated “M1” or “M2” terminal.

3. If the same speed must be used for both heating and cooling, remove the undesired motor speed lead from the “Heat” or

“Cool” terminal and connect that lead to the open terminal at “M1” or “M2” location or tape off. Attach a jumper between

the “Heat” and “Cool” terminals and the remaining motor speed lead.

Note: When using the same speed on motors with (4) speed leads, it will be necessary to tape off the terminal of the motor speed lead removed from the “Heat” or “Cool” terminal with electrical tape since an open terminal will not be available at the “M1” or “M2” location.

Thoroughly check the system after modification to ensure the proper operation of the circulating air blower in all modes of operation.

Continuous-Fan Operation using “G”

Energizing the “G” terminal on the furnace control provides continuous fan operation. This is done by connecting the G terminal of the thermostat to the G terminal on the furnace control. When the FAN switch is turned from auto to ON the fan will operate continuously at “HEAT” speed. EAC will be energized in this mode.

NOTE: In heating, the fan will turn off during furnace ignition and warm up then restart at heating speed.

Hard Wired Continuous-Fan Operation

A terminal is provided on the furnace control located in the circulating air blower compartment for operation of the continuous−fan option. This connection is intended for the low speed motor tap, and has a lower contact rating (8 amps) than the heat and cool taps. When the low speed blower lead is connected to this terminal, this will provide low speed blower operation whenever the other two speeds (Heat or Cool) are not energized. EAC not powered in this mode.

Thoroughly check the system after modification to ensure the proper operation of the circulating air blower in all modes of operation.

Separate speed selections for Heat, Cool, and Continuous-Fan

Connect low speed lead from circulating air motor to the “Cont” terminal at the furnace control. The appropriate motor leads should already be connected to the “Heat” and “Cool” terminals.

Heating and Continuous-Fan Speed the Same

If it is necessary to operate the heating speed and continuous−fan speed using the same blower speed, connect a jumper between the “Heat” and “Cont” terminals on the furnace control.

Note: There should be only ONE motor lead going to the “Heat” and “Cont” terminals.

11. Furnace Maintenance

FIRE, EXPLOSION, OR CARBON MONOXIDE POISONING HAZARDS

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

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

WARNING

See “User’s Information Manual”.

ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD

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

Improper servicing could result in dangerous operation, death, personal injury or property damage.

• Before servicing, disconnect all electrical power, lockout and tag the furnace with a suitable warning label.

• When servicing controls, label all wires prior to disconnecting. Reconnect wires correctly.

• Verify proper operation after servicing.

WARNING

Page 29

441 01 2314 06

Specifications are subject to change without notice.

12. Sequence of Operation & Diagnostics

The following is the normal operating sequence.

Cooling (Y) Request:

24VAC signals applied to Y & G terminals of FCB (furnace control board)

• Cool motor speed is energized after 5 second Cool Fan On Delay time.

Y & G signals removed from FCB

• Cool motor speed is de−energized after 90 second Cool Fan Off Delay time.

Continuous Circulating Fan (G) Request:

24 VAC signal is applied to G terminal of the FCB.

• Heat motor speed is energized without delay.

G signal removed from FCB.

• Heat motor speed is de−energized after 5 second delay.

NOTE 1) Furnace de−energizes the fan during the heat exchanger warm−up period on a call for Heating that occurs during a G request unless a blower motor lead is connected to the Cont terminal on the FCB, in which case see NOTE 2).

NOTE 2) Heating or Cooling requests received during a Fan request cause the fan speed to change to the appropriate heat or cool speed after the Fan on Delay time expires. The fan returns to continuous circulating speed after the selected Fan Off Delay time expires following loss of the Heating or Cooling request.

Continuous Circulating Fan Hard-Wired (Cont) Request:

Field selected low speed motor tap installed on “CONT” terminal.

• Low speed is energized when power applied to furnace. Operates at this speed continuously while there are no other

blower demands from furnace control. Fan demands from furnace control for heat, cool or “G” will override hard−wired speed tap.

NOTE 3) EAC is NOT active for hard−wired mode but IS active for fan demands from furnace control for heat, cool and “G”.

Heating (W) Request:

• 24 VAC signal applied to W terminal of FCB.

• Inducer motor turns on and the pressure switch(es) close(s).

• Following a 15 second prepurge delay after the pressure switches closes, the igniter begins a 17 second warm−up.

• The gas valve is energized, the main burners light and flame is sensed.

• The igniter is de−energized after the main burners ignite.

• FCB will delay blower operation for the 30 seconds timed from the opening of the gas valve.

W signal removed from FCB.

• The gas valve de−energizes and the main burners go out.

• The inducer runs for a 15 second postpurge period.

• The fan stays at Heat speed.

• The fan de−energizes after the selected Heat Fan Off Delay time expires, timed from the gas valve de−energizing.

HUMIDIFIER − The 24V HUM is energized when the pressure switch closes on a call for heat. The 115V HUM (called HUM on Control) is energized when the inducer is energized.

ELECTRONIC AIR CLEANER − EAC is energized when there is a blower speed call. It is NOT energized when blower operates in the hard−wired continuous fan mode.

NOTE 4) If a new Heating request arrives while the control is waiting in the Heat Fan Off Delay time, the FCB will wait for the selected Heat Fan Off Delay then start a new heating cycle as long as the heat call remains.

Page 30

441 01 2314 06

Specifications are subject to change without notice.

Heating Request with Gas Shut Off:

24 VAC signal applied to W terminal of FCB. The FCB will attempt 4 cycles for ignition then go to soft lockout for 3 hours then try for ignition again as long as the heat call remains. Power reset will clear lockout.

• Inducer motor turns on

• Following a 15 second prepurge delay, the igniter begins warm up.

• The igniter glows red−hot for 22 seconds, then turns off. The FCB flashes error code 6.

• The igniter stays off for 17 seconds, then begins to warm up again.

• The igniter glows red hot for 22 seconds then turns off. The FCB continues flashing error code 6.

• The igniter stays off for 17 seconds, then begins to warm up again.

• The igniter glows red hot for 22 seconds then turns off. The FCB continues flashing error code 6.

• The igniter stays off for 17 seconds, then begins to warm up again.

• The igniter glows red hot for 22 seconds then turns off. The FCB proceeds to soft lockout and stops flashing error code 6 and begins

flashing error code 6 + 1.

• The inducer motor de−energizes after a 15 second post purge.

Control Board Diagnostic Codes (See Figure 25)

OFF = 24VAC or 115VAC is off, fuse is open Heartbeat = Normal operation or no previous Diagnostic Code ON SOLID = Soft Lockout − Furnace Control Error (1 hr delay) If code repeats immediately following power reset then replace control 1 Flash = Not used 2 Flashes = Pressure switch(es) closed when should be open 3 Flashes = Pressure switch open when should be closed 4 Flashes = Limit or roll−out switch open 5 Flashes = Flame sensed out of sequence 6 Flashes = Failure to ignite or flame sense lost while running 6 + 1 Flashes = Soft Lockout − Max trials for ignition reached (3hr delay) 7 Flashes = Soft Lockout − Limit or roll−out switch open longer than 2 minutes (1 hr delay)

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

* If status code recall is needed, briefly (2−3 seconds) remove then reconnect one limit switch wire (main or rollout) to display last stored status code. Do not remove power or blower door before initiating status code recall or code will be lost. Code is automatically cleared after 72 hours or upon power reset.

* Proper flame sense microamps: 0.7 microamps D.C. minimum, 2.0 − 4.0 microamps nominal

Figure 25 Furnace Control Board

Diagnostic Light

115 VA C HUM

FUSE

24 VAC HUM

Page 31

441 01 2314 0630

Specifications are subject to change without notice.

Save This Manual For Future Reference

Downflow

Models

*8DNL050B12B2 *8DNL075B12B2

*8DNL075F16B2 *8DNL100F14B2 *8DNL100L20B2 *8DNL125L20B2

* Denotes Brand

International Comfort Products, LLC

Lewisburg, TN 37091 U.S.A.

Page 32

441 01 2314 06

Specifications are subject to change without notice.

Model Specifications

Manufacturers Number (Mfr No -See Rating Plate) ALL Models

Specifications

*8DNL050B12 *8DNL075B12 *8DNL075F16 *8DNL100F14 *8DNL100L20 *8DNL125L20

General

Input (Btuh) Output (Btuh) Temp. Rise (

oF/o

50,000 40,000

35-65/19-36

75,000 61,000

35-65/19-36

75,000 61,000

35-65/19-36

100,000

81,000

35-65/19-36

100,000

81,000

30-60/17-33

125,000 101,000

35-65/19-36

Electrical (Volts/Hz) 115/60 115/60 115/60 115/60 115/60 115/60

Rating Plate Amps 9.2 9.0 12.0 9.2 13.5 13.2

Gas Type Nat Propane Nat Propane Nat Propane Nat Propane Nat Propane Nat Propane

Transformer Size (VA) T'stat Heat Anticipator

.50

Gas & Ignition

Std. Main Orifices (No/Size)

2/#42 2/#54 3/#42 3/#54 3/#42 3/#54 4/#42 4/#54 4/#42 4/#54 5/#42 5/#54

Gas Valve Honeywell Regulation Type)

Manifold Press. (in wc/Pa)

VR 8205S

SNAP

3.5/872 10.0/2490 3.5/872 10.0/2490 3.5/872 10.0/2490 3.5/872 10.0/2490 3.5/872 10.0/2490 3.5/872 10.0/2490

Ignition Type/Series Hot Surface

Combustion

Flue Outlet Size (Inches) Std. Outlet Temp (less than)

480

F/264oC

480

F/264oC

480

F/264oC

480

F/264oC

480oF/264oC

480

F/264oC

Limits & Controls

Thermal Sensor (

oF/o

Limit Control

300/149

See Parts List

300/149

See Parts List

300/149

See Parts List

300/149

See Parts List

300/149

See Parts List

300/149

See Parts List

Std. Pressure Sw. (Part No)

Press - Close (in wc/Pa) Press - Open (in wc/Pa)

1013529

-0.69/-172

-0.59/-147

High Pressure Sw. (Part No) 1014051

Furnace Control (Type) Furnace Control On delay (Timed-secs) Off delay

Integrated

60,100,140,180

Blower Data

Blower Size Inches (D x W) Motor Amps/RPM Motor Type/H.P. Cap. Mfd/Volts Filter Type (600 FPM) Filter Size - in(mm) Filter Quanitity Min. Cool Cap. (Tons) Max. Cool Cap. (Tons)

11 x 8 (279 x 203)

8/1050

PSC/

7.5/370

Washable

16x18x1(406x457x25)

1.5 3

11 x 8 (279 x 203)

8/1050

PSC/

5.0/370

Washable

16x18x1(406x457x25)

1.5 3

11 x 10 (279 x 254)

10/1050 PSC/

10/370

Washable

16x18x1(406x457x25)

2 3 4

11 x 10 (279 x 254)

8/900

PSC/

7.5/370

Washable

16x18x1(406x457x25)

2 2

3.5

11 x 10 (279 x 254)

11.9/900 PSC/

40/370

Washable

16x18x1(406x457x25)

2 3 5

11 x 10 (279 x 254)

11.9/900 PSC/

40/370

Washable

16x18x1(406x457x25)

2 3 5

Gas Conversion Kits

Nat to Propane NAHA001LP (1172958*) Propane to Nat NAHA001NG (1172960*)

* Must be ordered from Service Parts

Page 33

441 01 2314 06Specifications are subject to change without notice.

Circulation Air Blower Data

*8DNL050B12 (1)

Exterrnal Static Pressure

(in wc/Pa)

Air Delivery in CFM (L/s)

Furnace Rated @0.5 in wc (125 Pa) ESP

TAP LOW MED L MED H HIGH

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

0.10 25 702 331 963 454 1260 595 1537 725

0.20 50 663 313 904 427 1222 577 1477 697

0.30 75 624 294 845 399 1183 558 1416 668

0.40 100 567 268 803 379 1136 536 1362 643

0.50 125 510 241 760 359 1088 513 1308 617

0.60 149 461 218 689 325 1003 473 1210 571

0.70 174 412 194 617 291 917 433 1111 524

0.80 199 361 170 543 256 791 373 1030 486

0.90 224 310 146 468 221 664 313 948 447

1.00 249 249 118 436 206 529 250 808 381

*8DNL075B12 (1)

External Static Pressure

(in wc/Pa)

Air Delivery in CFM (L/s)

Furnace Rated @0.5 in wc (125 Pa) ESP

TAP LOW MED L MED H HIGH

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

0.10 25 634 299 728 344 975 460 1353 639

0.20 50 588 277 696 328 963 454 1337 631

0.30 75 533 252 653 308 936 442 1307 617

0.40 100 489 231 605 286 905 427 1274 601

0.50 125 454 214 559 264 861 406 1225 578

0.60 149 420 198 513 242 810 382 1164 549

0.70 174 373 176 473 223 737 348 1087 513

0.80 199 338 160 425 201 672 317 994 469

0.90 224 255 120 392 185 605 286 884 417

1.00 249 232 109 294 139 529 250 764 361

*8DNL075F16 (1)

External Static Pressure

(in wc/Pa)

Air Delivery in CFM (L/s)

Furnace Rated @0.5 in wc (125 Pa) ESP

TAP LOW MED L MED H HIGH

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

0.10 25 648 306 900 425 1285 606 1789 844

0.20 50 636 300 913 431 1307 617 1770 835

0.30 75 628 296 916 432 1328 627 1747 824

0.40 100 621 293 897 423 1324 625 1718 811

0.50 125 611 288 889 420 1309 618 1680 793

0.60 149 585 276 869 410 1283 605 1640 774

0.70 174 557 263 843 398 1240 585 1588 749

0.80 199 522 246 809 382 1192 563 1523 719

0.90 224 485 229 748 353 1122 529 1452 685

1.00 249 441 208 680 321 1041 491 1374 648

* Denotes Brand

NOTE: (1) Gray area is above maximum temperature rise range.

# CFM − Cubic feet per minute airflow. L/s − Liters per second

Filter required for each return−air inlet. Airflow performance includes 1″ (25.4mm) washable − 600 FPM (3.0 m/s) max filter media.

*See Table for bellyband location on motor

*8DNL100F14 (1)

External Static Pressure

(in wc/Pa)

Air Delivery in CFM (L/s)

Furnace Rated @0.5 in wc (125 Pa) ESP

TAP LOW MED L MED H HIGH

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

0.10 25 756 357 1012 478 1372 647 1881 888

0.20 50 671 317 950 448 1323 624 1803 851

0.30 75 585 276 888 419 1273 601 1724 814

0.40 100 538 254 834 394 1225 578 1665 786

0.50 125 491 232 780 368 1176 555 1606 758

0.60 149 439 207 739 349 1106 522 1544 729

0.70 174 387 183 697 329 1035 488 1481 699

0.80 199 321 151 629 297 954 450 1381 652

0.90 224 255 120 561 265 873 412 1281 605

1.00 249 210 99 444 210 767 362 1132 534

*8DNL100L20 (1)

External Static Pressure

(

in w

Air Delivery in CFM (L/s)

Furnace Rated @0.5 in wc (125 Pa) ESP

TAP LOW MED L MED H HIGH

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

0.10 25 1798 849 2024 955 2212 1044 2375 1121

0.20 50 1754 828 1960 925 2147 1013 2290 1081

0.30 75 1709 807 1896 895 2081 982 2205 1041

0.40 100 1662 784 1835 866 2002 945 2116 999

0.50 125 1614 762 1774 837 1922 907 2026 956

0.60 149 1542 728 1694 799 1837 867 1943 917

0.70 174 1470 694 1614 762 1752 827 1860 878

0.80 199 1376 649 1521 718 1650 779 1753 827

0.90 224 1282 605 1428 674 1548 731 1645 776

1.00 249 1065 503 1263 596 1407 664 1508 712

*8DNL125L20 (1)

External Static Pressure

(in wc/Pa)

Air Delivery in CFM (L/s)

Furnace Rated @0.5 in wc (125 Pa) ESP

TAP LOW MED L MED H HIGH

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

0.10 25 1936 914 2165 1022 2319 1094

−−− −−−

0.20 50 1891 892 2097 990 2283 1077

−−− −−−

0.30 75 1845 871 2028 957 2246 1060 2334 1101

0.40 100 1787 843 1965 927 2154 1017 2253 1063

0.50 125 1728 815 1902 898 2061 973 2172 1025

0.60 149 1632 770 1799 849 1959 924 2062 973

0.70 174 1536 725 1695 800 1856 876 1952 921

0.80 199 1434 677 1593 752 1728 815 1820 859

0.90 224 1331 628 1490 703 1600 755 1687 796

1.00 249 1215 573 1352 638 1424 672 1537 725

Bellyband Location on Motor

A Dimension

Model *8DNL inches mm

050B12B2 13/

35.1

075B12B2 15/

41.9

075F16B2 17/

100F14B2 13/

35.1

100L20B2 15/

41.9

125L20B2 15/

41.9

Page 34

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Specifications are subject to change without notice.

Wiring Diagram *8DNL

Page 35

INDUCED−COMBUSTION GAS FURNACE

PARTS REPLACEMENT INFORMATION GUIDE

CASING GROUP

Outer door Blower door Door bracket Top filler plate Bottom encloser

INDUCER GROUP

Housing assembly Pressure switch Inducer assembly Vent elbow assembly Inducer blower gasket

BLOWER GROUP

Blower housing Blower hanger Blower partition Blower cutoff (Panel) Blower motor Blower wheel Capacitor (where used) Capacitor strap (where used)

FILTER GROUP

Filter(s) − washable (1−in.)

HEAT EXCHANGER GROUP

Heat exchanger cell Cell Panel Low NOx baffle (California models only)

ELECTRICAL GROUP

Control bracket Junction box Limit switch(es) Circuit board Door switch Transformer Wiring harness 24v Wiring harness 120v

GAS CONTROL GROUP

Manifold Burner Assembly Orifice

PRODUCT NOMENCLATURE

Flame sensor Hot surface ignitor Gas valve Manual reset limit switch Burner support assembly

WARNING

FIRE, EXPLOSION, ELECTRICAL SHOCK AND CARBON MONOXIDE POISONING HAZARD

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

Improper installation, adjustment, alteration, service, maintenance, or use can cause carbon monoxide poisoning, explosion, fire, electrical shock, or other conditions which may cause personal injury or property damage. Consult a qualified installer, service agency, local gas supplier, or your distributor or branch for information or assistance. The qualified installer or agency must use only factory-authorized and listed kits or accessories when modifying this product.

* 8 DN L 0 75 B 1 2 B #

* = Brand Specific Engineering Rev.

Brand Efficiency Denotes minor change

8 = Non−Condensing, 80+% Gas Furnace

9 = Condensing, 90+% Gas Furnace Marketing Digit

Installation Configuration Denotes major change

UP = Upflow DN = Downflow Cooling Airflow

UH = Upflow/Horizontal HZ = Horizontal 08 = 800 CFM 16 = 1600 CFM

DH = Downflow/Horizontal 12 = 1200 CFM 20 = 2000 CFM

MP = Multiposition, Upflow/Downflow/Horizontal 14 = 1400 CFM 22 = 2200 CFM

Major Design Feature

1 = One (Single) Pipe N = Single Stage Cabinet Width

2 = Two Pipe P = PVC Vent B = 15.5″ Wide J = 22.8″ Wide

D = 1 or 2 Pipe T = Two Stage F = 19.1″ Wide L = 24.5″ Wide

L = Low NOx V = Variable Speed Input (Nominal MBTUH)

* Denotes Brand (C, H, T)

Have available the product/model number and the serial number located on the unit rating plate to ensure correct replacement parts.

TO OBTAIN INFORMATION ON PARTS: Consult your installing dealer or the classified section of your local telephone directory under the “Heating Equipment“ or “Air Conditioning Contractors and Systems” headings for dealer listing by brand name, or contact:

International Comfort Products, LLC

Consumer Relations Department

P.O. Box 128

Lewisburg, TN 37091, USA

931−270−4100

Specifications are subject to change without notice.

441 01 2314 06

ICP C8DNL, H8DNL, T8DNL Installation Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual