Bard 403293A User Manual

IMPORTANT

Installers' Information Manual, Users' Information Manual, Wiring Diagram, Parts List and Warranty are inside or attached and should be read before the Installation is started or before service is attempted.

After factory final assembly, this furnace has been dielectrically tested. Operation tests have

been performed on the burners, fan control and blower motor.

- TO THE INSTALLER -

AFFIX THIS PACKET ADJACENT TO

THE FURNACE.

- TO THE OWNER -

RETAIN THIS PACKET AND ITS CONTENTS FOR

FURTHER REFERENCE.

TABLE OF CONTENTS:

INSTALLERS' MANUAL

INSTALLERS' INFORMATION MANUAL GAMA VENTING TABLES ADDENDUM SIDEWALL VENTING ADDENDUM

USER'S MANUAL

(PRINTED IN RED AND BLACK AND INSERTED IN THE CENTER OF THIS PACKET.)

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408320 A

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MANUAL PACKET 403293 A

INSTRUCTION ASSEMBLY 408310 B

COVER ASSEMBLY 406303 A

PARTS

FUNCTIONAL PARTS LIST

The format of this parts list allows you to get the part number quickly. It allows you to easily identify the part and the part number. Propane Conversion Kit and Filter Frames are also listed in the parts list.

If you do not know the part number, find the part illustra

tion to the left and note the illustration number. Locate the

illustration number in the Parts List on the back foldout of this packet Read across the list to locate the part number for the appropriate size furnace.

EXAMPLE: You need an inducer motor relay for a

60,000 BTUH input 1/3 H.P. furnace:

1. Find the inducer motor relay in the illustration and get the illustration number (In this case 13).

2. Go to the table and read down to illustration number 13.

3. Read across the row to find the part number for the 60,000 BTUH input

1/3 H.P.furnace.

Read part number 9043-316.

408360 A

INSTALLERS' MANUAL

To assure both sate and proper operation, please caretully toliow the instructions in this manual to correctly install this new turnace.

ATTENTION, INSTALLER! After installing turnace, give the user:

—Users’ Information Manual —Parts List —Installers’ Information Manual —Warranty Information

ATTENTION, USER! Your furnace installer should give you the above four important documents relating

to your furnace. Keep these as long as you keep your furnace. Pass these documents on to later furnace purchasers or Users'. If any of the four documents is missing or damaged, contact your installer or furnace manufacturer for replacement. For efficient service, please give your furnace model and serial number, listed in Section 1 of your Users’ Information Manual or from your furnace rating plate. Throughout this Installers' Information Manual, we frequently use the word "you" when referring to the person responsible for application, installation and service of your furnace. Please remember to have only qualified service technicians perform these services.

WARNING', Individuals who install this furnace, must have the training and experience necessary to Install gas furnaces. They must also have training and experience necessary to Install related comfort air conditioning appliances. Improper installation could create a hazard, resulting In damage, injury or death.

While we have written these instructions as accurately and thoroughly as possible, they may not cover every system variation or contingency. Also, questions of interpretation may arise. For more information, solutions to particular problems or clarification, contact your focal distributor or the manufacturer. See the furnace rating plate for who to contact.

Furnace installation must follow all applicable NATIONAL, STATE and LOCAL CODES.

UPFLOW

ELECTRONIC IGNITION INDUCED DRAFT FURNACE

WARNING: FOR YOUR SAFETY, WHAT TO DO IF YOU SMELL GAS: — DO NOT TRY TO LIGHT ANY APPLIANCE; — DO NOT TOUCH ANY ELECTRICAL SWITCH; DO NOT USE ANY PHONE IN THE BUILDING; — IMMEDIATELY CALL YOUR GAS SUPPLIER FROM A NEIGHBOR'S PHONE; FOLLOW GAS

SUPPLIER'S INSTRUCTIONS;

— IF YOU CANNOT REACH GAS SUPPLIER, CALL FIRE DEPARTMENT.

HORIZONTAL

DOWNFLOW

IMPORTANT SAFETY NOTE: After installing the furnace, show the user how to turn off gas and

electricity to furnace. Point out control and switch locations for turning off gas and electricity. Go over Sections 4 and 6 of Users' Information Manual and Section 29 in this manual with user. Make sure user understands the importance of following all safety precautions.

920101

404200 A

SECTION

_________________________

TABiE Of CONTENTS

____________________________________

PAPE

SECTION 1 SECTION SECTION 3 SECTION 4 SECTION 5 SECTION 6 SECTION

SECTION 8 SECTION 9 SECTION

10 SECTION 11 SECTION 12 SECTION SECTION

14 SECTION 15 SECTION SECTION

SECTION

18 SECTION 19

SECTION 20

SECTION 21

SECTION 22 SECTION

SECTION 24 SECTION 25 SECTION 26 SECTION 27 SECTION

SECTION 29 SECTION 30

PREPARING TO INSTALL FURNACE..............................................................................................................................2

IMPORTANT SAFETY RULES..........................................................................................................................................3

MEETING CODES.............................................................................................................................................................3

DETERMINING BEST FURNACE LOCATION..................................................................................................................3

IDENTIFYING FURNACE DIMENSIONS. SPECIFICATIONS, AND POSITION..............................................................4

ALLOWING FOR CLEARANCES.......................................................................................................................................7

SUSPENDING FURNACE.................................................................................................................................................8

PROVIDING FOR COMBUSTION AND VENTILATION AIR........................................................................................... 9

PROVIDING FOR PROPER VENTING

......

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

-........................................13

TOOLS NEEDED FOR INSTALLATION..........................................................................................................................17

INSTALLING GAS PIPING.............................................................................................................................................. 18

INSTALLING ELECTRICAL WIRING.............................................................................................................................. 19

FOLLOWING FIELD WIRING DIAGRAMS......................................................................................................................19

ADJUSTING ROOM THERMOSTAT HEAT ANTICIPATOR...........................................................................................19

SEQUENCE OF OPERATION.........................................................................................................................................20

INSTALLING DUCTWORK..............................................................................................................................................20

SELECTING AND INSTALLING FILTER FRAMES.........................................................................................................23

CHECKING BEFORE STARTING FURNACE.................................................................................................................25

ADJUSTING PILOT..........................................................................................................................................................25

ADJUSTING MANIFOLD PRESSURE.............................................................................................................................26

CHECKING GAS INPUT..................................................................................................................................................27

ORIFICE SIZE..................................................................................................................................................................29

DERATING FOR HIGH ALTITUDES...............................................................................................................................29

ADJUSTING BLOWER SPEED.......................................................................................................................................30

MEASURING DUCT WORK STATIC PRESSURE.........................................................................................................31

MEASURING AIR TEMPERATURE RISE.......................................................................................................................32

CHECKING CONTROLS.................................................................................................................................................33

BLOWER TIMINGS..........................................................................................................................................................33

MAINTAINING FURNACE IN GOOD WORKING ORDER............................................................................................. 34

GETTING OTHER INFORMATION AND PUBLICATIONS.............................................................................................34

SICTION 1 -

PREPARING TO INSTALL TURNACB.

A. Literature.

Review this manual. Users’ Information Manual and Parts List. In particular, see User's Information Manual and Parts List for location and identification of furnace com ponents.

After installing furnace, give this Installers' Information Manual, Users' Information Manual, Warranty and Parts List to user. You may have questions as you install the furnace. If you need help on any of the installation in structions or other matters relating to the furnace, contact the office where you bought the furnace. You may also refer to the furnace rating plate for a contact name.

B, Installation Positions.

1. You may install furnace as-shipped in an upflow or horizontal configuration in one of three positions shown in Figure 1.

VENT

OUTLET

VENT

OUTLET

HORiZONTAL

LEFT SIDE DOWN

TVPE 1

UPftOW

TVPE 2

HORIZONTAL

RIGHT SIDE OOWN

TVPE 3

FIGURE 1

2. You may convert furnace quickly and easily from its as-shipped configuration. After conversion, you can install it as a downflow or horizontal furnace In one of three positions shown in Figure 2.

VENT OUTLET

VENT

OUTLET

G. Provide adequate combustion and ventilation air to space

where furnace is being installed. See Section 8 for more information. Connect this furnace to an approved vent system, venting combustion products outdoors. See Sec

tion 9 for more information.

H. Never test for gas leaks with an open flame. Use a com

mercial soap made specifically for leak detection to check

all connections. See Section 11 for more information.

VENT OUTLET

TYPE 4

TYPE 5

TYPE 6

FIGURE 2

SECTION 2 — IMPORTANT SAFETY RULES* WARNING: Read and exactly follow these rules. Fail

ure to do so could cause Improper furnace operation, resulting In damage, injury or death.

A. Signal words.

To alert you to potential hazards, we use the signal words

"WARNING" and "CAUTION" throughout this

manual. "WARNING" alerts you to situations that could cause serious injury or death. "CAUTION” alerts you to situations that could cause minor or moderate injury or property damage. To help you, we use the words "must" and "should" in this manual. "Must" is mandatory, "Should" is advisory.

6. Use only the type of gas approved for this furnace; refer to furnace rating plate.

WARNING: Only use natural gas In furnaces de

signed for natural gas. Only use Propane (LP) gas for furnaces designed for Propane (L.P) gas. Make sure furnace will operate properly on gas type avail able to user. Do not use this furnace with butane. Using wrong gas could create a hazard, resulting In

damage, injury, or death.

C. DO NOT install this furnace outdoors or in a mobile home,

trailer or recreational vehicle. It is not A.G.A. designcertified for these installations. This furnace is suitable for a home built on site or manufactured home completed

at final site.

D. Carefully choose furnace installation site. DO NOT di

rectly expose furnace to drafts, wind or other outdoor conditions. See Section 8 for more information.

E. DO NOT install furnace in a corrosive or contaminated

atmosphere. Make sure all combustion and ventilation

air requirements are adhered to in addition to local codes

and ordinances. See Section 8 for more information.

F. DO NOT use this furnace during construction when ad

hesives, sealers, and/or new carpets are being installed.

If the furnace must be used during construction, provide

clean outdoor air for combustion and ventilation to ^rnace space. See Section 8 for more information.

I. Always install duct system with furnace. Be sure duct

system has external static pressure within allowable fur nace range. See Sections 16 and 25 for more information.

J. Completely seal supply and return air ducts to furnace

casing. Duct work must run to an area outside furnace air space. Seal duct work wherever it runs through walls, ceilings or floors. See Section 16 for more information.

SECTION 3 — MEETING CODES.

Before installing furnace, make sure you know all applicable codes, National, state and local codes may take precedence over any instructions in this manual. Be sure to consult:

— Authorities having jurisdiction over furnaces; — Local code authorities for information on electrical

wiring, gas piping and vent pipe;

— Current National Fuel Gas Code ANSI Z223.1/NFPA

54:

— Current National Electrical Code ANSI/NFPA 70.

See Section 30 for information on getting copies of these codes.

SECTION 4 — DETERMINING BEST FURNACE LOCATION.

You may install this furnace as an upflow or downflow fur nace in an alcove, attic, basement, closet, garage, or utility room. Install furnace so all electrical components are pro tected from water.

You may install it as a horizontal furnace in an alcove, garage, attic, basement or crawl space.

Select furnace location to meet all requirements in this manual, making sure to refer to;

— Section 2 for safety rules; — Section 6 for minimum clearances; — Section 7 for furnace suspension; — Section 8 for combustion and ventilation air; — Section 9 for venting: — Section 11 for gas piping;

— Section 12 for electrical wiring; — Section 16 and 25 for duct work; — Section 17 for filters.

Consult local code authorities for additional location require ments.

Locate the furnace close to the chimney/vent and as near the center of the air distribution system as possible. Install furnace as level as possible.

Provide ample space for servicing and cleaning. Location

must allow 30 inches minimum front clearance for service. Always comply with minimum clearances shown on inside of front door. Do not install furnace directly on carpeting, tile or any combustible material other than wood flooring.

NOTE: A combustible floor base, available from manu

facturer, is required for downflow furnace installation on

wood flooring. HAZARDOUS LOCATIONS. When furnace is in a residential garage, it must be installed

so that burners and ignition source are located no less than fS'inches above the floor. Also, furnace should be protected

from physical damage by vehicles. When furnace is in public garages, airplane hangers, or other

buildings having hazardous atmospheres, install unit in ac cordance with recommended good practice requirements of the National Fire Protection Association, Inc. See Section 30.

SECTION 5 — IDENTIFYING FURNACE DI

MENSIONS, SPECIFICATIONS, AND POSITION.

2, Furnace as-shipped position may be converted to a

downflow furnace by following instructions in B. be low. Once conversion is complete, furnace may be installed as a downflow furnace. Furnace may also then be installed as a horizontal on its right or left side. See Figure 2.

WARNING: Do not install furnace on its back. Doing so could cause a fire, resulting In damage, injury or death.

See Figure 3 for dimensional drawings and specification table. B. Converting furnace from as-shipped configuration.

READ ALL INSTRUCTIONS THOROUGHLY BEFORE STARTING CONVERSION.

NOTE: Start conversion with furnace on its back.

A. A unique feature of this furnace is that it may be installed

as an upflow furnace, horizontal furnace, or downflow

furnace (minor conversion required).

1. Furnace as-shipped is an upflow furnace. Furnace may be installed in this position or may be installed as a horizontal on its right or left side without any conversion. See Figure 1.

BTUH* INPUT

40,000 40,000 1/3 3" 60,000 1/4 4"

60.000 1/3 4" 60,000 80,000 80,000 60,000

80,000 3/4 4" 100,000 1/3 4" 100,000 100,000 3/4 4" 120,000 1/2 5" 120,000 140,000 3/4 5" 140,000 3/4

'See Furnace rating plate located on blower door.

MOTOR*

H.P.

1/4

1/2 4“ 1/4 1/3 1/2

1/2

3/4

VENT

DIAMETER

4" 4" 4"

5' 5'

FURNACE

WIDTH

14-1/2 14-1/2 14-1/2 14-1/2 12-7/8" 17-1/2 14-1/2 14-1/2 17-1/2 20-1/2 13-7/8" 18-15/16" (2) 10-4 17-1/2 15-7/8" 15-15/16" 17-1/2 20-1/2 20-1/2 18-7/8" 18-15/16" 20-1/2 23-1/2 21-7/8" 21-15/16" 23-1/2

RETURN AIR SIZE

13- 23 /3 2" X B

WARNING: When servicing controls, all wires must be labeled prior to disconnection. Mlswlring can cause improper operation resulting In damage, Injury, or death.

1. Remove front door. Study components described in conversion. See Figure 4.

SUPPLY AIR SIZE

78-1S/16'* X C

12-7/8" 12-15/16" 10-4 50-80 12-7/8* 12-15/16" 10-6

12-7/8" 12-15/16" 15-7/8" 15-15/16" 10-8

12-7/8" 12-15/16* 12-7/8" 12-15/16" 10-6 15-7/8" 15-15/16*

15-7/8" 15-15/16* 10-8 18-7/8"

18-7/8" 18-15/16" (2) 10-4 21-7/8"

12-15/16" 10-6 45-75

18-15/16"

21-15/16*

BLOWER

WHEEL

SIZE

10-4 45-75

10-4

10-8 50-80 10-6 55-85 1245

(2) 10-4

10-8

(2} 10-4 (2) 10-6

TEMP

RISE “F

30-60 1265

35-65 1635 50-80 915 40-70 1235

40-70 1930 50-80 1585

40-70 45-75 1660 45-75 45-75 I860 50-80 2235

CFM

at 0.50“ W.C.

805 850

1260

1645

1950 1965

FURNACE AND DIMENSIONS SPECIRCATIONS

FIGURE 3

AS-SHIPPED CONFIGURATION

FIGURE 4

CONVERTED CONFIGURATION

FIGURE 5

2. Remove two junction box mounting screws from top

plate. Remove four top plate mounting screws. Save all screws. Remove top plate and front duct flange.

3. Disconnect pressure switch wires and inducer motor connector wires.

4. Remove ten screws from the inducer pan; save screws. DO NOT drop screws into heat exchanger openings.

5. Lift inducer pan (with inducer motor and pressure switch stilt in place) about 1/4 inch and tilt left side up to clear casing flanges. Use care not to damage inducer gasket.

NOTE: If possible, decide on direction of gas entry now. Screws to inlet gas valve fitting are accessible. See Section 11.

6. Rotate inducer pan 180 degrees, line up mounting holes and place inducer pan in furnace. Use care not to damage gasket. Replace ten screws in in ducer pan. See Figure 5.

7. Pressure switch wires will no longer reach pressure switch. Remove cable tie around excess length of red/yellow piggyback, blue and purple pressure switch wires.

8. Connect pressure switch wires as follows. Wires are numbered on insulation near terminals.

a. #1 Purple wire to pressure switch, terminal 'C

(Common).

b. #2 Blue wire to pressure switch, terminal 'NC

(Normally Closed).

c. #7 and #8 Red/Yellow piggyback wire to pres

sure switch, terminal 'NO' (Normally Open).

d. Route all pressure switch wires over inducer

motor. e. Reconnect inducer motor connector. f. Replace wire tie in area that prevents wires from

touching hot surfaces.

9. Rgmove four screws that secure bottom plate to cas ing sides. Remove bottom plate; save screws,

10. Install top plate, removed in step 2, where bottom plate was. Secure with four screws. Inducer outlet is now lined up with vent outlet in top plate.

11. Stand up furnace with top plate down. Line front duct

flange up with holes. Place bottom plate on top of duct flange and secure both to casing with four screws.

12. Install junction box on bottom plate using two #6B

screws removed in Step 2. Junction box cover and screw of junction box must face front of furnace.

13. Gasket around flue collar must be in place. If gasket is loose, glue It. If gasket is damaged, replace it.

14. Install a single wall vent pipe section (minimum length 30 inches) (Field-Supplied) to inducer outlet with three

equally spaced screws. This pipe serves as an in ducer outlet extension to which an appropriate vent can be attached. Due to minor variations in vent pipe, available from different manufacturers in the field, and to assure the tightest seal possible, inducer out

let extension is not supplied with furnace. Additional vent pipe sections or Type B1 adapter may then be

added when installing the furnace.

WARNINGS If Inducer outlet extension Is shorter than 30 Inches and chimney or vent becomes blocked, com bustion products may be drawn Into furnace. This could cause nausea or asphyxiation, resulting In Injury or death.

15. Conversion from as-shipped configuration is now complete.

SECTION 6 — ALLOWING FOR CLEARANCES.

WARNING: Do not Install furnace on Its back, doing so could cause a fire, resulting In damage. Injury or death.

Establishing clearances from combustible material.

Locate clearance label on inside of front door. See Figure 6.

WARNINGS Furnace Installation must meet all minimum clearances from combustible material specified In this manual and all applicable codes. Failure to provide re quired clearance between furnace and combustible mate rials could cause a fire, resulting In damage, injury, or death.

WARNINGS This furnace Is A.G.A. design certified for direct Installation on wood flooring for upflow and hori zontal positions.

• Do not install furnace on carpeting, tile or other

combustible material.

• Do not Install furnace In a closet In horizontal

position.

• Do not Install furnace on wood flooring without

special base In downflow position.

MINIMUM INCHES CLEARANCE

CLOSET.

UPFLOW POSITION

• FOR CASING WIDTHS 17 INCHES OR LARGER 0 CLEARANCE MAY BE USED. 18 INCH FRONT CLEARANCE REQUIRED FOR ALCOVE. FOR INSTALLATION ON COMBUSTIBLE FLOORING.

MINIMUM INCHES CLEARANCE CLOSET.

DOWNFLOW POSITJON

• FOR CASING WIDTHS 17 INCHES OR LARGER 0 CLEARANCE MAY BE USED. 18 INCH FRONT CLEARANCE REOUIRED FOR ALCOVE. FOR INSTALLATION ON COMBUSTIBLE FLOORING ONLY WHEN INSTALLED ON SPECIAL BASE PART N0. 4-024400.

MINIMUM INCHES CLEARANCE

• CLEARANCE SHOWN IS FOR AIR INLET AND AIR OUTLET ENDS. VENT MUST MAINTAIN CLEARANCE LISTED ABOVE. FOR INSTALLATION ON COMBUSTIBLE FLOORING.

FOR HORIZONTAL POSITION LINE CONTACT IS ONLY PERMISSIBLE BETWEEN LINES FORMED BY INTERSECTIONS OF TOP AND TWO SIDES OF FURNACE JACKET AND BUILDING JOISTS. STUDS OR FRAMING.

ALL POSITIONS RLOUIRE 30 INCHES FRONT CLEARANCE FOR SERVICE*

TOP SIDES BACK

1 1* 0

1 0 0 2

TOP SIDES BACK

1 1* 0 6 1 0

HORiZONTAL POSmON

TOP SIDES* BACK 1 2* 1

0 COMBUSTIBLE MATERIAL IN ALCOVE OR

FRONT VENT

0 COMBUSTIBLE MATERIAL IN ALCOVE OR

FRONT VENT

0 2

rO COMBUSTIBLE MATERIAL IN ALCOVE.

FRONT VENT 0 18 0 18

6 WHEN USING SINGLE WALL

1 WHEN USING B1

6 WHEN USING SINGLE WALL

1 WHEN USING B1

6 WHEN USING SINGLE WALL

1 WHEN USING B1

40ZB№

MINIMUM CLEARANCES

FROM COMBUSTIBLE MATERIALS

FIGURE 6

1. Upflow Installation. Upflow position is approved for installation on

wood flooring. Typical upflow furnace installa tions are an alcove, attic, basement, closet, ga rage, or utility room. See Figure 6 or furnace clearance plate for minimum clearances to com bustible materials.

2. Horizontal Installation

a. Horizontal position is approved for installa

tion on wood flooring. Typical horizontal fur

nace installations are an alcove, garage, at

tic, or crawl space. See Figure 6 or furnace

clearance plate for minimum clearances to combustible materials.

b. Attic Installation.

Line contact is permissible for furnaces installed in horizontal positions. The in

tersection of furnace top and sides forms

a line. This line may be in contact with

combustible material. However, maintain

a 6" clearance to vent connection unless

Type B1 vent is used. See Figure 7.

Doing any of the above could cause a fire resulting in damage, injury, or death.

TYPICAL ATTIC INSTALLATION

FIGURE 7

When using single wall vent pipe in horizon tal installations, horizontal furnaces with

14.50" high casings must be raised 1" to have 6” clearance to combustible material. See Figure 7.

Furnace installation on combustible flooring is permitted with combustible floor base available from manufacturer. Read installation instructions packaged with combustible floor base to correctly install. See Figure 8.

c. Install a platform under furnace that extends

a minimum 30" in front of furnace. This pro vides a work area and keeps insulating ma terials away from combustion air openings.

Secure platform to ioists.

WARNINOs When a furnace Is installed

In an attic or other Insulated space, keep all insulating materials at least 12" away from furnace and all burner combustion air openings. Failure to do so could cause

nausea, asphyxiation or fire, resulting In damage. Injury, or death.

d. Crawl Space Installation.

Furnace can be hung from floor joists or in

stalled on suitable blocks or pad. Pad or

blocks should provide enough height to re duce potential for water damage. See Sec tion 7.

3. Downflow Installation. You must convert furnace from as-shipped con

figuration for downflow furnace installation. See

Section 5.

DOWNFLOW FLOOR OPENING

FIGURE 8

See Figure 9 for installation diagram on com bustible floor.

4. Service Clearance. Allow minimum front clearance of 30 inches for service.

See Figure 6 or inside of front door for minimum service clearance.

SECTION 7 — SUSPENDING FURNACE.

Some installations will require that furnace be suspended from rafters or floor joists.

A common way to do this using threaded rods is shown in

Figure 10. Consider this means when people may walk un derneath furnace. Figure 11 shows another common suspen sion means using pipe strap. Other means that provide ad equate support may be used.

When furnace is not suspended in a crawl space, elevate furnace off ground to avoid water damage and allow for air conditioning coil drain.

Downflow position is approved for installation on non-combustible flooring. Typical downflow fur nace installations are an alcove, attic, closet, basement, garage, or utility room. See Figure 6

or furnace clearance plate for minimum clear

ances to combustible materials.

NOTE: Level furnace from front to back and from left to right within 1M" per four feet.

FURNACE, PLENUM, AND BASE INSTALLED ON A

COMBUSTIBLE FLOOR

FIGURE 9

SICTION S PROVIDING FOR COMBUSTION AND ViNTILATION AIR.

Before you begin installing furnace, pian to provide enough combustion and ventiiation air following:

— Current National Fuel Gas Code ANSI Z223.1/NFPA

54, Section 5;

— Local Code authorities. Refer to Section 31 of this

manual for these codes.

Ventilation is the process of replacing air which is required for furnace operation. The total amount of ventilation air pro vided within structure must equal all requirements of gas ap pliances in the building, plus any air quantities removed by range hoods, exhaust fans, etc.

Another reason to supply fresh outdoor air for combustion and ventilation is that it dilutes contaminants found in indoor air. These contaminants include bleaches, adhesives, clean ing solutions, detergents, solvents, cat litter, spray can pro pellants and most refrigerants.

WARNINDi Furnace and any other fuel-burning appli ances must have enough fresh air for propsr combus tion and ventilation. Lack of adequate combustion and ventilation air could cause nausea or asphyxiation, re

sulting in injury or death.

WARNINOi During construction, do not use air from

inside structure for combustion and ventilation. Vapors

from soma construction adhesives and materials can be come corrosive in the presence of a flame. This could cause failure of heat exchanger or vent system, result

ing in damage. Injury or death.

WARNINO: Combustion and vsntllatlon air that contains

chlorine, fluorine, bromine and Iodine could cause heat exchanger or vent system failure, resulting In damage, Injury or death,

WARNINO: When installing a furnace In an attic or other

insulated space, keep furnace free and clear of all lnsu> lating materials. Make surs all Insulation Is at least 12" away from burner combustion air openings and well away from openings into furnace space that supply air for combustion and ventilation. Failure to do this could causa nausea, asphyxiation or fire, resulting In damage, injury or death.

WARNINGS When Installing furnace in an alcove, attic,

basement, closet, garage, or utility room do not store items in front of furnace or In front of closet or utility door which would block combustion air openings to fur* nace. Failure to do this could cause nausea, asphyxia tion or fire, resulting In damags, Injury or death.

DO NOT install furnace where any combustion or ventilation air openings will allow outside air to blow directly against furnace.

WARNINGS Drafts blowing directly against furnace could

cause improper combustion which could cause heat ex changer failure or fire, resulting In damage, Injury or death.

Sufficient air MUST be provided to insure there wilt not be a negative pressure in furnace room or space. In addition, there MUST be a positive seal between furnace and return air duct to avoid pulling air from burner area.

Provide adequate combustion and ventilation air by consider' ing volume of furnace installation space. Use these instruc tions and current National Fuel Gas Code ANSI Z223.1/NFPA 54 to determine whether furnace is in an unoonfined or con fined space.

If ratio is less than 50, installation space is a con

fined space. If ratio is 50 or greater, installation space

is an unconfined space.

B. Installing furnace In confined space.

WARNING: You must provide permanent air open

ings to a conflned furnace installation space from another area as described below. Failure to do ao could result In Inadéquat# combustion and vsntllatlon air. Thsae could cause nausea, asphyxiation or fire, resulting In damage, injury or death.

1. Combustion and ventilation air openings. a. All combustion and ventilation air from inside the

structure.

1. The furnace space must be provided with two permanent openings to an additional

room(s) of sufficient volume so that the combined volume of all spaces meet the cri

teria above for an unconfined space.

The total input of all gas appliances within

the combined space must be considered in

making this determination. See Figure 12.

2. a. Each opening must have minimum free area of one square Inch per 1,000 Btuh per hour of the total combined input rat

ing of all gas appliances within the con

fined furnace space, but not less than

100 square inches. One opening must be within 12 inches of the top and an other opening within 12 inches of the

bottom of the furnace space. See Fig

ure 12.

A. Determining If your space Is confined or unconflned.

Two factors determine whether a furnace installation space is confined or unconfined:

— Volume of installation space; — Total gas input of appliances to be installed in that

space.

To determine which your space is:

1. First calculate furnace installation space volume in cubic feet.

2. Determine combined input rating (BTUH) of all gas appliances in furnace installation space, including furnace input. This is the total combined input rating.

3. Divide total combined input rating by 1,000. Then divide this number into installation space volume.

Here's the formula:

Space Volume

Ratio

Total lnput/1,000

For example:

Total Input

Btuh (square Inches)

40,000-100,000 100

120,000 120 140,000

b. If building is of unusually tight construc

tion, provide a permanent opening di rectly communicating with the outdoors. Opening shall have a minimum free area of one square inch per 4000 Btuh of total input rating for all equipment in the enclosure.

If return air is taken directly from hall way or space next to furnace that com municates with furnace spaces, all air for combustion must come from out doors.

b. All combustion and ventilation air from outdoors.

1. The furnace space must be provided with two permanent air openings directly to the outdoors, or by ducts to the outdoors or spaces (attic or crawl spaces) that freely ac cess the outdoors. These combustion and ventilation openings will give fresh air free access to furnace space for combustion and ventilation. You must also provide air suffi cient for all other gas appliances within fur nace space.

Free Area Per Opening

140

Ducts must freely access outdoors or spaces (attic or crawl spaces) which freely access the outdoors. Well ventilated attics or crawl spaces usually satisfy this requirement.

2. Locate one combustion and ventilation air

operîing within 12" of top of furnace space. Locate another within 12" of bottom of fur nace space.

3. When directly accessing the outdoors, each opening must have a minimum free area of

one square inch per 4,000 Btuh of total combined input rating of all gas appliances within furnace space. See Figure 13A.

4. If combustion air ducts will run vertically, ducts and each opening must have a mini mum free area of one square inch per 4,000 Btuh total combined input rating. You must allow for all gas appliances within the fur nace space. See Figure 13B.

For example:

Required

Total Input

Btuh

40,000 10.0 4

60,000 15.0 5

80,000 100,000 120,000 30.0 7 140,000 35.0

Free Area per Opening

(square inches)

20.0 6

25.0 6

Suggested

Round Pipe

(inches dia.)

5. if combustion air ducts will run horizontally, ducts and each opening must have a minimum free area of one square inch per 2,000 Btuh total combined input rating. You must allow for all gas appliances within the furnace space. See Figure 14.

CHIMNEY OR CAS vent

NOTE: EACH AIR DUCT OPENINO SHALL HAVE A FREE AREA OF NOT LESS THAN ONE SQUARE INCH PER 2.000 BTU PER HOUR OF THE TOTAL INPUT RATInC OF ALL EQUIPMENT IN THE ENCLOSURE

to 25% free area. Assume metal louvers and grilles have 60 to 75% free area. Refer to current National

Fuel Gas Code ANSI Z223.1/NFPA 54.

Example: Furnace is 100,000 Btuh input and is to be installed in a confined space that contains no other gas appliances. Rectangular combustion and ventilation air ducts will run horizontally from outdoors to furnace space.

a. Calculate free area required.

Because combustion and ventilation air ducts run horizontally, allow 2,000 Btuh. See 2b. above.

Furnace Input

Btuh

Free Area Required

2,Q0Q Btuh

per square inch

IF THE EQUIPMENT ROOM IS LOCATED AGAINST AND OUTSIDE WALL ANO THE AIR OPENINGS

COMMUNICATE OIRECTLY WITH THE OUTDOORS. EACH OPENING SHALL HAVE A FREE AfffiA

OF NOT less than one SQUARE INCH PER 4,000 BTU PER HOUR OF THE TOTAL INPUT

RATING OF ALL EQUIPMENT IN THE ENCLOSURE.

EQUIPMENT LOCATED IN CONFINED SPACES; ALL AIR FROM OUTDOORS.

FIGURE 14

For example:

Total input

Btuh

Free Area per Opening

(square Inches)

Round Pipe

(Inches dia.)

40,000 20 6 60,000 30 80,000 40

100,000

50 8 120,000 60 9 140,000 70

6. Ducts which introduce combustion and ventila tion air from outside structure into furnace space,

must have the same cross sectional area as the free area of openings to which they connect. The minimum dimension of rectangular air ducts

shall not be less than 3 inches.

2. Louvers, grilles, and screens. Sometimes, louvers, grilles, or screens cover com

bustion and ventilation air openings. If so, you must provide larger openings than those calculated above. This is necessary because louvers, grilles and screens block and reduce an opening's free area.

Louver, grille and screen manufacturers supply tech nical data on their products, which usually includes

the Tree area." Sizing the openings with louvers,

grille or screen in place will provide minimum free area to furnace space as calculated above. Do not use screen smaller than 1/4" mesh. If you do not know free area, assume that wood louvers have 20

7 8

100,000

50 square inches

2,000

Each opening must have a free area of 50 square inches.

Calculate overall area of openings to give needed

free area once you cover them to keep out rain and other outside elements.

Example: If you will use wood louvers to cover combustion and ventilation air openings and you do not know free area of wood louvers, use 20%, as suggested in ANSI Z223.1/NFPA 54.

100 x Free area

from a) above)

Louver free area

openings expressed

overall area of openings with wood louvers installed

as a percentage

100 x 50

250 square inches

Each of the two combustion and ventilation air openings must have a total area of 250 square inches. This is when wood louvers cover openings

for a 100,000 Btuh input furnace and combustion

and ventilation air ducts run horizontally.

c. Calculate minimum rectangular duct size needed.

If you choose a rectangular duct with the mini mum allowed dimension of 3", the other duct dimension must be at least 16-2/3". This is cal culated by dividing the 50 square inches of free area from a) by 3", with equals 16-2/3".

WARNINGi You must fix combustion and ventila

tion air louvers and grilles In open position or Inter

lock them with furnace operation. Furnace operation

with louvvrs or grilles closed could cause Inadequate combustion or ventilation air, resulting In Injury or death.

C. Installing furnace in unconfIned space.

Refer to current National Fuel Gas Code ANSI 2223.1/ NFPA 54 for more information. This code does not re

quire that you make special provisions for combustion

and ventilation when furnace is in an unconfined space. However, it is always prudent to arrange for combustion and ventilation air as if installation space is confined space.

In the past, infiltration through loose construction pro

vided enough air for combustion and ventilation when

furnace was in an unconfined space. Current construction

methods may now prevent infiltration of air into unconfined space. These current methods include increased insula tion, vapor barriers, tight fitting doors and windows, and weather-stripping.

D. Allowing for exhauet fan operation.

1, When furnace is in a ventilated attic, crawl space,

residertce garage, or outside the heated space, ex haust fan drafts can adversely affect its operation. These drafts can come from kitchens, bathrooms, clothes dryers or anywhere within the heated space.

WARNING: Exhaust fans that blow against fur

nace could cause heat exchanger failure or fire, resulting In damage, Injury, or death.

2. When furnace is in a repair garage or inside the heated space, exhaust fans can adversely affect its

operation. Exhaust fans in kitchens, bathrooms, clothes dryers or anywhere within heated space in crease combustion and ventilation air requirements. This is because exhaust fans reduce the amount of combustion and ventilation air available to the fur nace. A fireplace also reduces amount of combus tion and ventilation air. You must allow for these reductions.

WARNING: You must allow for reduction of air

available for combustion and ventilation by ex haust fans and fireplaces. Failure to do so could result In Inadequate combustion and ventilation sir. This could cause nausea, asphyxiation, or firs, resulting In damage, Injury, or death.

3. Exhaust fan air may contain compounds of chlorine, fluorine, bromine, and iodine. If used for combus tion, this contaminated air will adversely affect fur nace operation.

WARNING: If used for combustion and ventila

tion, contaminated exhaust fan air could cause heat exchanger or vent system failure resulting In damage, Injury, or death.

SICTION 9 —

PROVIDING P

Vent furnace using these instructions and Venting Adden dum. Also, meet requirements of local utilities and other local code authorities. You must connect furnace to a vent or fac tory-built chimney or a suitably sized, constructed and lined

masonry chimney. Vent or factory-built chimney must meet a

recognized standard. Chimney lining method and material

must comply with local requirements. Use corrosion-resistant

material meeting nationally recognized standards for vent construction.

INTING.

WARNING: Inadequate vent or chimney could allow

combustion products to collect In structure, resulting In

Injury or death.

WARNING: Vent this furnace separately from any appli

ance designed to burn solid fuel, particularly wood-burn-

Ing or coal burning appliances. Improper venting could

allow combustion products to collect In structure, result

ing In injury or death. A. Venting category.

The furnaces covered by this manual are design-certified as CATEGORY 1 for venting, CATEGORY 1 furnaces

have non-positive vent static pressure and rely on the beat content of combustion products to vent. You may common vent CATEGORY 1 furnaces.

The furnaces covered in this manual are also designcertified as CATEGORY 3 for venting, only when they are installed with manufacturer specified vent system components and installation practices.

Category 3 gas appliances rely on the heat content of combustion products and mechanical or other means to vent. You may not common vent CATEGORY 3 gas ap pliances.

B. Types of vent systems.

These definitions will help you understand the terms we use.

1. "Vent" and "chimney" refer to open passageways.

These passageways convey vent gases from vent connectors to the outside. Gases begin their final ascent at the vent or chimney. Vents and chimneys usually run vertically or nearly vertical. When they serve only one gas appliance, they are called "dedi cated" vents or chimneys. Whan they serve multiple gas appliances, they are called "common" vents or chimneys.

2. A "vent connector" connects a gas appliance to a

vent or chimney. Vent connectors usually run directly from the furnace draft inducer collar to vent or chim ney. Vent connectors may have vertical and horizon tal runs.

3. A "venting system" is a continuous open passage

way from the draft inducer collar to the outside. Venting systems usually have vent connector(s) and a vent or chimney. Venting systems commonly serve

a single furnace or a single furnace and a water

heater. Other multiple-appliance venting systems are

less common.

C. Design considerations.

1. General considerations. Avoid oversizing furnace for your application. Se

lect a furnace model with a rated heating output close to the calculated heating toad. This extends

the firing period, decreasing the potential for con densate formation in the vent.

a. Too small a vent cannot carry all combustion

products outdoors. Too large a vent will not vent combustion products rapidly enough to avoid potential for condensation. Refer to Venting Ad dendum for correct size vent.

b. Vent height must be a minimum of five feet.

Minimize vent connector horizontal runs to the extent possible for best performance.

c. The designer must consider the building's ori

entation, answering these questions. Will the vent terminate outside the building where its op

eration could be adversely affected by winds? Could any adjacent buildings adversely affect vent operation? Allowing for these factors can

reduce the possibility of downdraft conditions.

b. Use Type B1 vent connectors in or through at

tics, crawl spaces, or other cold areas. Install thimbles that meet local codes when vent con

nectors pass through walls or partitions of com bustible material.

c. Keep vent connectors as short as possible by

locating furnace as dose as practical to vent or chimney. Avoid unnecessary turns or bends which create resistance to

Adding an elbow adds resistance. For example, adding a 6" 90-degree elbow would be the equivalent of adding 20 feet of horizontal 6" pipe. 45-degree elbows have lower resistance than 90degree elbows, and can work for most vent runs.

d. You may increase vent connector diameter to

overcome installation limitations and obtain con

nector capacity equal to furnace input. Make this

increase as close as possible to draft inducer collar, allowing for necessary adapters and fit tings.

e. If you join two or more vent connectors before

they enter the vertical vent or chimney, use cau tion. See Venting Addendum.

flow of vent gases.

d. If your local experience indicates possible con

densation problems, provide for draining and disposal of venting system condensate.

2. Vent sizing. a. Sometimes the horizontal distance from the fur

nace to the vent or chimney is already given;

this is known as the horizontal vent connector

run. The vent or chimney height is also usually

given as is the Btuh input of the gas appliances

served by the vent.

Check these parameters to be sure the venting system will work. Use approved engineering practices, Venting Addendum, these instructions, and Part 7 of current National Fuel Gas Code ANSI Z223.1/NFPA 54. Use vent capacity tables in Venting Addendum to check existing or new vent sizes for CATEGORY 1 furnaces.

b. See Venting Addendum for single appliance

venting and multiple appliance (common) vent

ing. For multi-story installations, refer to current

National Fuel Gas Code ANSI Z223.1/NFPA 54.

c. Minimum vent connector diameter from furnace

to vent or chimney is same as draft inducer col lar.

3. Vent connector. a. Vent connectors must be made of noncombus

tible, corrosion resistant material capable of withstanding vent gas temperatures. They must be thick enough to withstand physical damage

and be accessible for inspection, cleaning and replacement.

f. Do not connect this furnace to any portion of a

vent system which operates under positive pres sure. Positive pressure would result with CAT

EGORY 3 and 4 appliances connected to the

vent.

g. Do not connect vent connector to a chimney flue

serving a fireplace unless you permanently seal

fireplace flue opening.

4. Vertical vent or chimney. a. Vents and chimneys usually extend vertically with

offsets not exceeding 45-degrees. Consider vent pipe runs more than 45'degrees as horizontal runs. Include their length in the total horizontal run.

b. Designer and installer must provide an appropri

ately sized common vent for all appliances con nected to it. See Venting Addendum.

c. Connect this CATEGORY 1 furnace only to vent

systems with other CATEGORY 1 appliances.

WARNING: Do not connect this Category 1

furnace to a vent system used by Category 3 and 4 appliances. Do not connect It to vents with mechanical draft systems operating at positive pressure. Improper venting could al

low combustion products to collect in struc

ture during use, resulting In damage, Injury or death.

5. Chimney. Furnace is suitable for venting into a properly sized

and lined masonry chimney. Consult National Fuel

Gas Code ANSI Z223.1/NFPA 54 for construction details. If chimney is oversized, liner is inadequate

OT evidence of condensate exists, consider using chimney as a pathway for suitably sized Type B1 vent liner. See Figure 15.

FIGURE 15

WARNIN9I Support Type B1 vent liner in ma

sonry chimney. Maintain at least a 1" clearance on all sides to reduce possibility of condensate in vent. Condensate may cause vent to deterio rate allowing combustion products to collect In structure, which could result In injury or death. See Figure 16.

NOTE; For more information on proper chimney in spection and relining procedures, Gas Research In stitute (GRI) has a topical report entitled "Masonry Chimney Inspection and Reiintng". Obtain copies

through American Gas Association (A.G.A.) at

1-800-841-8400.

6. Vent termination. a. Terminate ail verticai vents with a iisted vent

cap or roof assembly unless local codes require otherwise. See vent cap or roof assembly

manufacturer's instructions. Locate vent termi nation (vent cap or roof assembly) in an area

without positive wind pressures or eddy currents.

Eddy currents occur when air swirls over roof peaks. They can cause down-drafts and ad versely affect vent operation. See Figure 17.

FIGURE 16

WAKNINOi Vent liner muet not block opening

where other epplicncee' vent connector* enter chimney. Blocked opening* could cau»* com bustion products to collact In atructur*, r*sutt-

Ing In damag*, Injury or dssth.

WARNINOt Do not uaa unllnad masonry chlm-

naya. Thasa Incraasa risk of condansats forma tion, which may causa chlmnay to datariorata, allowing combustion products to collact In structura, raaulting In damaga. Injury or death.

Some vent terminations or caps protect against eddy currents and down-drafts, Consult their

manufacturer's instructions. Vent terminations or caps should usually be at least the same size as

the vent. They may be larger if the installation

warrants.

b. Vent systems must end at least five feet above

the highest gas appliance connection. Vent pipe must extend at least three feet above the point where it passes through the roof. Vent termina

tion must be at least two feet higher than any

portion of building within ten feet horizontal and vent termination must be at least two feet higher

than roof peaks within ten feet horizontal. See

Figures 18 and 19. Some vent cap manufactur ers offer vent caps that allow reduced clearances.

Consult their Instructions.

D. Installation.

1. Vent connectors. Attach vent connector at draft inducer collar. Make

sure flue gasket is in place providing a seat. Use a minimum of three equally spaced screws around connection. Connect all other vent pipes using three equally spaced screws at each joint. Exception is only when you use Type B1 vent pipe with self locking connections or high temperature plastic pipe.

WARNINGS Unsecured vent pips connections

may loosen. This can allow combustion products

to collact In structura, resulting In Injury or death.

Install vent connectors without any dips or sags. Slope them upward from furnace at least f/4” per foot. To prevent sagging, at each joint support vent connectors and horizontal portions using hinges, straps or equivalent. Seal all connections where vent connectors enter chimney. See Figure 15.

TERMINATION MORE THAN 10 FEET FROM RIDGE

FIGURE 18

TERMINATION 10 FEET OR LESS FROM RIDGE

FIGURE 19

WAftNINGt Failure to properly terminate

vent chimney systems could allow combus tion products to collect In structure, result ing In Injury or death.

c. Terminate venting system at least three feet

above any forced-air building inlet within ten feet. Consider doors, windows and gravity air building inlets. Locate vent termination at least four feet below, four horizontal feet from or one foot above any of these openings.

To avoid blockage, attach vent connector to a ma sonry chimney above the extreme bottom. For in spection ease, use thimble or slip joint to make vent connector removal easy. Firmly attach connector.

Insert all vent connectors into, but not beyond, inside chimney wall.

2. Vertical vent or chimney systems. Install vent materials following their listing terms,

manufacturer's instructions, these instructions and local codes.

A gas vent passing through a roof must extend through roof flashing, jack or thimble. It must termi

nate above roof surface.

E. Existing vent considerations.

Masonry chimneys previously used for venting solid fuel or oil burning equipment should be lined with suitable metal liner. Also provide an accessible clean out per cur rent National Fuel Gas Code ANSI Z223.1/NFPA 54.1.

1. Inspection of vents (chimneys). a. Make sure existing vent or chimney is proper

size and construction for appliances that will use it. The best way to do this is to size as if it were

a new installation. Compare the existing vent to your calculations and make necessary correc tions.

b. Examine vent or chimney cleanouts to make sure

they remain tightly closed when not in use. Make sure vent or chimney passageway is clear and free of obstructions. Look for evidence of con densate or deterioration in vent or chimney. Ei ther of these means an inadequate vent.

c. If you find an inadequate vent or chimney, do

not leave it as is. Repair or replace it. A new vent must meet these instructions and current

National Fuel Gas Code ANSI Z223.1/NFPA 54.

Rabuild a chimney to meet national standards.

MCriON 10 —

TOOLS NIIDID rOR INSTALLATION.

WARNINOi An Inadequate vent or chimney

could allow combuatlon products to collect

In structure, resulting In Injury or death.

d. Sometimes you wiii repiace a common vented

appliance. Make sure common vent size is cor rect for aJl appliances connected to it. If you re move a furnace from a common vent without replacing it, the vent will likely be too large for

remaining appliances. See Venting Addendum.

e. The following steps shall be followed with each

appliance remaining connected to common vent ing system placed in operation, while other ap pliances remaining connected to common venting system are not in operation.

1. Seal any unused openings in common vent ing system.

2. Visually inspect venting system for proper size and horizontal pitch and determine there is no blockage or restriction, leakage, corro sion and other deficiencies which could cause an unsafe condition.

3. Insofar as is practical, close all building doors and windows and all doors between space in which appliances remaining connected to common venting systems are located and other spaces of building. Turn on clothes dryers and any appliances not connected to common venting system. Turn on any ex haust fans, such as range hoods and bath room exhausts so they will operate at maxi mum speed. Do not operate a summer ex haust fan. Close fireplace dampers.

4. Follow Operating Instructions. Place appli ance being inspected in operation. Adjust

thermostat so appliance will operate con tinuously.

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

6. If improper venting is observed during any of the above tests, common venting systems must be corrected.

NOTE: Follow current National Fuel Gas Code ANSI 2223.1/NFPA 54 to correct im proper common vent operation. Any common vent resizing must approach minimum size

determined by using Venting Addendum.

ITEM

TOOL DESCRIPTION

HAND TOOLS

1. Carton KnHe

1/4" nut driver

5/16" nut driver

4. 3/8” nut driver

1/4" X 8" straight-

5. blade screwdriver

#2 X 8" Phillips

6. screwdriver

7/16" open end or

7. tubing wrench

2-8" to 14" pipe

wrenches

4" adjustable

9. wrench

10. 8” Channel-lock ptiei^

3/16" Allen

11. wrench

12.

9/64" Allen wrench

SUPPLIES

13. Pipe thread sealant suitable for use with

propane (LP) gas

14.

Bottle of soap solutbn

15.

2-1/8” pipe, manual shutoff valves

TEST INSTRUMENTS

16.

Volt meter with 50 and 150 volt ranges

17. Clamp around ammeter with 10 amp and higher ranges

USED FOR

Furnace removal from carton

Control box cover

Casing and blower

Blower and motor mounts

Wire terminals and manifold pressure adjustment

Components in control box

Main burner orifices

Gas pipe installatbn

Blower wheel set screw tightening

Strain reliefs

Inlet and outlet pressure tap plug removal from gas control

Honeywell gas inlet fitting

Gas pipe and controls

Gas leak checking

Gas control inlet and pressure checking

Electrbal chedt of controls and power supply

Amp draw of motors and control check

18. 10-turn coil of wire to fit on ammeter

19. "U" Tube Water

Manometer with O.V resolution 0“to 15" W.C. range

20. Slope gauge with

0.01” pressure

measurement taps

and tubing, Oto 1"

W.C. range

Room thermostat heat anticipator setting

Gas pressure

measurement

Duct work static pressure

furnace. A convenient way to do this when you have

reduced bottom clearance, is to make drip leg by using a 1/2" to Г NPT Tee, Then install a 1-1/2" long.l” NPT nipple in Tee with a Г NPT pipe cap to complete drip leg.

3. When using black iron gas pipe, install an A.G.A. listed ground joint union between drip leg (sediment

trap) and furnace gas control. Locate ground joint

union to allow easy servicing of burner assembly and gas control.

4. Install gas pipe to inlet side of furnace gas control.

21. 2 thermometers with 1 -degree

Fahrenheit

resolution, 50

degrees F to 175

degrees F range

22. Stop watch

23. Torque wrench (100 inch-pounds)

Temperature rise measured

through lurnace

Gas input meter timing

Proper screw installation

SICTION 11 — INSTALLING GAS PIPING.

Equipment needed: Save time by getting these tools before you start: Item number(s) 8,12.13 and 14 listed in Section

10.

A. Preparation.

Gas piping must meet requirements of current National

Fuel Gas Code ANSI Z223.1/NFPA 54 and local codes.

Size of pipe running to furnace depends on:

• Length of pipe;

• Number of fittings;

• Specific gravity of gas;

• Input requirements fBtuh) of all gas-fired appli ances attached to same main supply line.

Refer to current National Fuel Gas Code ANSI Z223.1/

NFPA 54 for correct gas pipe sizing information.

Plan furnace gas supply piping so it will not interfere with removal of burner assembly, front door or blower door for servicing.

Always use a pipe thread sealant which is resistant to propane (LP) gas solvent action. Sparingly apply sealant to all joints on male threads only, starting two threads back from end.

B. Installation.

1. Install A.G.A. listed manual shut-off valve in gas supply line immediately upstream of furnace. Install

1/8" NPT plugged tapping accessible for test gauge connection. Omit separate, plugged tapping if local area accepts plugged tapping in gas control inlet.

2. After in-line manual shut-off valve, install a drip leg (sediment trap) at gas supply line inlet connection to

WARNINGS Do not thread gas pipe too far. Do

ing so may cause gas control to split or crack

which could cause a gas leak or distortion or

malfunction of gas control. Thasa could causa a firs or explosion resulting in damage, Injury or death.

5. Isolate gas control from gas supply line pressure during leak check. Gas supply line test pressure de

termines how you isolate gas control.

WARNINGS At gas supply line, test pressure

equal to or less than 14 Inches W.C. (1/2 PSI). Isolate gas control from gas supply line by turning furnace gas control knob clockwise > to off posi

tion. Unexpected surges could damage gas con trol causing gas to leak, resulting In firs or ex plosion.

WARNINGS When test pressure la above 14

Inches W.C. (1/2 PSI), completely disconnect gas

control from gas supply line. Failure to Isolate

gas control from test pressure could damage H,

causing gas to leak, resulting in firs or explosion.

6. Use a commercial soap solution made to detect leaks and check all gas piping connections. Bubbles indi

cate gas leakage. Seat all leaks before proceeding.

WARNINGi Never use an open flams to check

for gas leaks. If a leak doss exist, a firs or explo sion could occur, resulting In damage. Injury or

death.

Furnace Gas Entry Piping.

1. See below for gas entry holes and knockouts.

a. A 1-1/4* X 2-3/4" knockout in top plate.

b. A 1-1/2" diameter hole and a 1-1/4" x 1-15/16"

knockout in right side of casing.

c. Two 1-5/8" diameter knockouts in left side of

casing.

2. Changing Gas Control Inlet. You may want to change direction of gas inlet elbow

on gas control. Gas control is shipped for right side gas entry. If you need top entry, remove the fitting. If you need left side gas entry, rotate the fitting 180 degrees.

a. Use 9/64" Hex Allen wrench to remove tour

screws. Check that O-ring is in bottom of gas inlet elbow. Rotate elbow to desired position.

WARNINGi Provide furnace with ita own separate elec

trical circuit, means of circuit protection and electrical disconnect switch. Follow current National Electrical Code ANSI/NFPA 70 and state and local codes. Failure to pro vide these shut-off means could cause electrical shock or fire, resulting In damage, Injury or death.

install proper electrical grounding by attaching grounding source to green wire conductor in furnace junction box. Fol low current National Electrical Code ANSI/NFPA 70 and local codes.

WARNINGS Furnace must have proper electrical ground.

Failure to provide a proper electrical ground could cause electrical shock or fire, resulting In damage. Injury or death.

fICTION 13 — FOLLOWING FIELD WIRING DIAGRAM

HEATING COOUNG

THERMOSTAT MODEL

b. Alternately tighten tour screws to 45 inch pounds

to form a gas tight seal.

c. Use a commercial soap solution made to detect

leaks and check all gas piping connections. Bubbles indicate gas leakage. Seal all leaks be

fore proceeding.

WARNINOi Never use an open flame to

check for gas leaks. If a leak does exist, a

fire or explosion could occur, resulting In

damage, Injury or death.

3. Allowing tor Electronic Air Cleaners.

Some large electronic air cleaners will interfere with incoming gas line. Install air cleaner on opposite fur nace side from gas entry or route gas pipe over top of air cleaner through one of alternate knockouts.

SICTION 12 —

INSTALLING ILICTRICAL WIRING.

Equipment Needed: Save time by getting these tools before

you start: Item number(s) 2 listed in Section 10.

Select a location for room thermostat that is away from sup

ply and return air registers, on draft-free interior wall, and not

near lights, television, direct sunlight, or other heat sources. Install thermostat following field wiring diagram in Section

13. Use electrical wiring that meets current National Electrical Code ANSI/NFPA 70 and local codes. Use Type T (63 de grees C rise) wire or equivalent. See Section 30 for code information.

TO 115V 1 PH 60 H2

POWR SUPPLY PER

LOCAL CODES

FIELD WIRING DIAGRAM

FIGURE 21

NOTE: When replacing original wire, use same type, color, or equivalent wire. Remember to renumber wire ends.

SECTION 14 — ADJUSTING ROOM THERMOSTAT HEAT ANTICIPATOR

Equipment Needed: Save time by getting these tools before you start: Item number(s)5,17 and 18 listed in Section 10.

Wire system using field wiring diagram in Section 13.

A. Exact haat anticipator setting.

SECTION 1 5 — SEQUENCE OF OPERATION.

Exactly setting heat anticipator helps avoid potential call backs. If you have any of the following factors, set heat anticipator to match actual current draw in circuit.

• The system contains controls other than those specified on wiring diagram;

• The system contains nonstandard (18 AWG) size thermostat wire;

• The system has longer than a 30-foot distance between thermostat and furnace.

Follow these steps to exactly set heat anticipator:

1. Use 2-foot piece of 24-guage thermostat wire, stripped on both ends.

2. Use ammeter capable of reading exact amperage in 0-10 amp range. If it is adjustable, set on 0-10 scale.

3. Wind the 2-foot piece of 24-guage thermostat wire ten times around one open arm of ammeter. Close ammeter arms. This will act as a ten times multiplier.

4. Make sure 115-volt power to furnace is on. Connect ends of wire on ammeter across terminals "R" and "W" of thermostat sub-base. Follow Figure 22.

■Riermostat Sub-Base Terminals

Ten (10) Turns

>^24 Ga. Wire

See Figure 23 for furnace wiring diagram. Thermostat calls for heat, energizing electronic ignition lock

out module. Electronic ignition lockout module provides power to gas control and igniter to light pilot. After proving pilot flame, inducer relay (IDR) closes, energizing inducer motor. Inducer motor starts and pressure switch closes, energizing gas control and time delay relay (TDR). Time delay relay energizes main blower within 20 to 30 seconds.

NOTE: If system locks out, set room thermostat below room

temperature for at least 10 seconds, then return to desired setting. To purge gas lines, it may be necessary to operate furnace through more than one lockout cycle at start-up.

After room thermostat is satisfied, gas control and inducer relay are de-energized simultaneously. Inducer motor de-en ergizes and returns pressure switch to normally closed (N.C.) position. Main blower remains energized through time delay relay for up to 180 seconds.

SECTION 16 — INSTALLING DUCT WORK,

CAUTION: Install all duct work to meet current standards:

• ASHRAE/NFPA 90, Standard for Installation of

Warm Air Heating and Air Systems;

• State and local codes.

Failure to follow these standards could reduce air flow or increase air leakage, resulting In reduced system per formance or furnace damage.

Amprobe ^

FIGURE 22

Read amp draw of furnace circuit on ammeter and divide by 10. This gives you an exact heat anticipator setting.

Example:

Meter reading - 9 amos

Divide by 10 turns - 10

Heat anticipator setting « .9 amps

6. Set room thermostat's heat anticipator to this amp

setting. Follow instructions provided with thermostat.

B. Approximate heat anticipator setting.

Find heat anticipator under room thermostat cover. Set heat anticipator at 0.6 amps. Follow instructions provided with thermostat.

Properly size duct work based on heat loss and heat gain calculations. Doing so assures:

• Good heating and cooling installations;

• Potentially fewer callbacks;

• Delivery of required circulating air.

For all furnaces, design duct systems for minimum and maxi mum external static pressures detailed in Figure 24. See Section 25 on measuring duct work static pressure.

NOTE: When furnace is installed in an upflow position, air

delivery above 1800 CFM requires both sides of furnace be used for return air, or a combination of one side and bottom or bottom only.

Downflow installations use top return or top and side return. Horizontal installations use end return or end and top return.

FIGURE 23

EXTERNAL STATIC PRESSURE

(Inches of Water Column)

"INPUT

MINIMUM

MAXIMUM

(BTU/HR)

40,000 60,000

80,000 100,000 120,000 140,000

0.10

0.12

0.15

0.50

0.20 0.50

0.20

0.50

‘Input is on furnace rating plate on blower door.

FIGURE 24

A. Supply air duct work.

NOTE: Supply air duct (plenum) connection must be the same size as the furnace supply air opening. Attach to furnace duct flanges.

If you install furnace in horizontal position with an air conditioner, design a minimum 18" long transition that allows free air flow through furnace and cooling coil. Make sure furnace temperature rise is within range noted on furnace rating plate. Also, consult air conditioner's duct work installation Instructions.

Seal supply air duct work to furnace casing, walls, ceilings or fioors it passes through. End duct work outside furnace space.

B, Return air duct work.

1. In upflow position, return air duct must be a mini mum depth of 23-31/32". See Figure 25.

2. In downflow position, return air duct must be a mini mum 19-7/8" inside depth. See Figure 26.

CASING WIDTH

14.50

20.50

23.50

BTU/HR"

INPUT

40,000 40,000 60,000 60,000

60,000 80,000

80,000 80,000

80,000

100,000

100,000 100,000

120,000 120,000

NOTE: In upflow position, if bottom return air is not

used, you must attach a solid bottom closure panel

to bottom return air opening. Bottom closure panel is

available from manufacturer as follows:

MOTOR*

H.P.

1/4 1/3 1/4 1/3

1/2 1/4

1/3 1/2 3/4 1/3

1/2 3/4

1/2

BOTTOM CLOSURE PART NUMBER

4045900

4045901 4045900

4045901

4045902

4045901

4045902

3/4

FIGURE 25

140,000 140,000

3/4 3/4

"See furnace rating plate on blower door.

4045903

WARNINOt Failure to install bottom closure

panel could allow combustion products to enter

circulating air stream, resulting In injury or death.

When furnace is installed so that supply air ducts carry air to areas outside the space containing the furnace,

return air must also be handled by a duct(s) sealed to

furnace casing and terminating outside the space con

taining furnace. Avoid vent system reverse pressure by running return

air duct work outside furnace space. Seal return air duct work to furnace casing, walls, ceilings or floors It passes through. End duct work outside furnace space.

WARNINOt Failure to seal return air duct work could

allow combustion products to enter circulating air

stream through air stream leaks, resulting in Injury or death.

C. Duct dampers.

You may balance air flow with dampers installed in each

branch run duct and adjust for even temperature throughout the heated space. For proper furnace opera tion, make sure:

• Supply air registers and return air grilles are open;

- Rugs, carpets, drapes or furniture are clear of

registers and grilles;

• Size and shape of supply air plenum is correct;

excess static pressure, adversely affecting furnace and cool

ing system operation.

Follow minimum sizing and quantity recommendations in Fig ure 27, as well as the air filter manufacturer's.

*GAS INPUT ‘MOTOR FILTERS

BTU/HR H.P. (FIELD SUPPLIED)

40,000 40,000 60,000 60,000 60,000 80,000 80,000 80,000 80,000

100,000

120,000

120,000 140,000 140,000

•GAS INPUT and MOTOR H.P. can be found on furnace rating plate.

1/4 1/3 1/4 1/3 1/2 1/4 1/3 1/2

3/4

1/3 1/2

3/4

1/2

3/4

3/4 3/4

DISPOSABLE AIR

(Two Required)

SIZE

14X25X 1 14X25X 1 14X25X 1 14X25X1 16X25X 1 14X25X 1 14X25X 1 16X25X 1

20 X 25 X t

16X25X1

16X25X 1 20 X 25 X 1 20 X 25 X 1 20 X 25 X 1 20 X 25 X 1 20 X 25 X 1

FIGURE 27

CLEANABLE AIR

FILTERS

(FIELD SUPPLIED)

(One Required)

SIZE

14X2SX 1 14X25X 1 14X25X 1 14X25X1 16X25X 1 14X25X 1 14X25X 1 16X25X 1

20 X 25 X 1

16X25X1

16X25X 1 20 X 25 X 1 20 X 25 X 1 20 X 25 X 1 20 X 25 X 1 20 X 25 X 1

• Number of supply air ducts is correct;

• You consider your own experience and seek as sistance if needed.

D. Common duct work.

If furnace will share common duct work with a separate cooling unit, install furnace parallel to or upstream of cooling unit. This avoids condensation in heating ele

ment. Do not install cooling coil in return air duct work. With parallel flow, dampers or other means must prevent

chilled air from entering furnace. If dampers or other means are not in full heat or cool position, furnace or cooling unit must not operate.

SECTION 17 — SELECTING AND INSTALLING FILTER CABINETS.

CAUTIONS You must Install air filters to keep these

components clean: blower motor, blower wheel and air

conditioning coll, If there le one. Dirty equipment may

reduce system efficiency or cause erratic control perfor

mance, resulting in damage to blower motor or heat ex

changer and air conditioner (if installed).

Do not install air filters inside furnace casing.

There are no air filters shipped with this furnace. Obtain and install correct size filters and proper filter frames. Air velocity

must not exceed 300-teet per minute through low velocity

disposable filters.

Air velocity must not exceed 650-feet per minute through high velocity cleanable filters. Too small a filter could cause

FIGURE 28

■ВАСЖ OF nLTER CABINET AND FURNACE CASING

SIDE OF niTER CABINET AND FURNACE CASING-

UPFLOW SIDE FILTER CABINET

FIGURE 29

1. Upflow Positions. a. Upflow position uses a bottom filter cabinet, side fitter

cabinet or return air filter grille (field supplied).

Manufacturer available bottom and side filter cabi nets provide correct fitter spacing to assure designed airflow. Field fabricated filter cabinets should allow 1” spacing between filter and furnace.

b. 1. For upflow side return, use a 16x25 filter,

2. For upflow air delivery above 1800 CFM use the following combinations of return air openings;

1. Bottom only or

2. 1 Side and Bottom or

3. Both sides. Use appropriate filter cabinets with combinations

listed above.

c. See figures 30A and ЗОВ for floor cut out and filter

size of bottom filter cabinet available from manufac

turer.

FILTIR ОШ1МЕТ

13-1/16" 15-1/16" 19-1/16" 19-1/16"

в c

23/32" 14-1/2"

1- 7^52’ 17-.1/2"

23/32" 20-1/2"

2- 7/32" 23-1/2"

UPFLOW FLOOR CUT OUT FOR

BOTTOM FILTER CABINET

FIGURE 30A

Bottom Return Filter Sizes

GAS INPUT

*BTU/HR

40,000

MOTOR

*H.P.

1/4

40,000 1/3

60.000

60,000

1/4

1/3 60,000 1/2 80,000 1/4 80,000 1/3

80,000 1/2 80,000 3/4

100,000 1/3

100,000 1/2 100,000 3/4

120,000 1/2

120,000

140,000

140.000

3/4 3/4 3/4

‘See furnace rating plate located on blower door.

FILTER

SIZE

14 X 25 14x 25 14x 25 14x 25 16 X 25 14x 25 14x 25 16x25

20 X 25 16x 25 16 X 25 20x 25 20x 25 20x 25 20 X 25 20 X 25

FIGURE ЗОВ

NOTE: Bottom and side filter cabinets available from manufacturer have a 1 inch space between furnace casing and filter for increased filter area. Placing fitter (field-supplied) directly against furnace bottom or side will decrease airflow and adversely affect furnace operation. Allow 1 inch clearance from furnace filter (field-suf^tied) to furnace.

2. Horizontal Position.

Horizontal position should use an appropriately sized and installed return air filter grille or duct work air fitter.

3. Downflow Position.

1. Is furnace properly equipped to operate with available fuel? See Section 2.

2. Is furnace level? See Section 4.

3. Have you cleared away all loose construction and insu lation materials? See Section 6.

4. Is furnace installed with proper clearances to combus

tible materials? See Section 6.

5. И furnace is in crawl space, is it sufficiently elevated

above the ground? See section 6. Downflow position furnaces use (2) 16 x 20 filters. For downflow position, install filter support in return air

plenum Of use return air filter grille. Downflow filter sup port and filter kit is available from manufacturer.

6. Does furnace have sufficient combustion and ventilation air? See Section 8.

7. Does vent system meet current National Fuel Gas Code ANSI Z223.1/NFPA 54 and local codes? See Section 9.

8. Is vent connection securely fastened to draft inducer collar? See Section 9.

9. Did you completely check gas pipe and controls for gas leaks? See Section 11.

10. Does electrical wiring follow current National Electrical Code ANSl/NFPA 70 as well as local codes? See Section

12.

11. Is furnace electrically grounded? See Section 12.

12. Is room thermostat properly installed and heat anticipa

tor set correctly? See Section 14.

13. Is duct work system correctly sized and sealed? See Section 16.

14. Are air filters in place and correctly sized? See Section

17.

15. Are proper fitter frames or fitter supports installed? See Section 17.

DOWNFLOW FILTER ARRANGEMENT

FIGURE 31

To inspect, replace or clean air filters, follow Users' Informa

tion Manual instructions.

SECTION 18 CHECKS BEFORE STARTING FURNACE.

Before starting furnace for the first time, be sure you can answer "Yes” to each of these questions:

16. On furnace installations above a 2000-foot elevation, Is

furnace derated properly? See Section 23.

SECTION 18 ^ ADJUSTING PILOT.

Equipment needed: Save time by getting these tools before you start: item number(s) 9,10,14,15,19 and 23 listed in Sec tion 10.

NOTE; To purge gas lines, it may be necessary to operate furnace through more than one lockout cycle at start-up.

WARNINGS You must have correct gas supply line and

pilot gas pressures. Correct pressures give proper pilot Ignition and burner operation. Use e "U" tube water ma> nometer to measure actual gas pressure. Failure to accu rately adjust pressure could cause a fire or explosion resulting in damage, injury or death.

A. Gas supply line pressure.

1. Turn off gas at manual shut-off valve in gas supply line just ahead of furnace.

2. Remove inlet pressure plug from gas control.

3. Make sure valve is in off position, then install 1/8”* pipe manual shut-off valve in hole vacated by plug.

4. Attach "U" tube water manometer to 1/0"-pipe manual shut-off valve just installed,

5. Open manual shut-off valve in gas supply line just ahead of furnace.

6. Open 1/8"-pipe manual shut-off valve leading to "U"

tube water manometer.

7. Turn on all gas appliances attached to gas supply tine.

8. Whh furnace operating, read gas supply line pres

sure on manometer.

a. Gas supply line pressure must not exceed

10,5 inches W.C. for natural gas.

b. Gas supply line pressure must not exceed

13 inches W.C. for propane (LP) gas.

9. If gas supply line pressure is not within these limits,

call gas supplier.

10. Turn off all gas appliances attached to gas supply line.

B. Pilot flame adjustment.

Before adjusting pilot flame, confirm that gas supply line pressure is correct, as explained in paragraph A) above,

then proceed;

3. Disconnect pressure switch, red/yeltow, #7/#8 piggy back wire from pressure switch, terminal ”N.0.”.

4. Start furnace following Operating Instructions on front door. Pilot will light; after delay, inducer blower will come on, but main burners will not light.

5. Pilot flame should cover 1/2” of tip of flame sensor

as shown in Figure 32.

6. If you need to adjust pilot flame, remove pilot adjust ment cover screw on gas control. Save screw for reinstallation. Turn inner adjustment screw clockwise

-> to decrease pilot flame; counter-clockwise <- to increase pilot flame. Install cover screw and tighten to torque of 5 inch-pounds to prevent gas leakage.

7. Shut off furnace. Connect pressure switch, red/yellow, #7/#8 piggyback wire to pressure switch, terminal

-N.O.".

8. If you will not be checking gas input now, turn off gas. Use manual shut-off valve in gas supply line just ahead of furnace, Remove shut-off valve from gas control inlet pressure tap. Install pressure tap plug. Turn on gas.

9. Check pilot adjustment cover screw and gas control inlet pressure tap plug for gas leaks. Use a commer cial soap solution made for leak detection.

WARNINOi Never use an open flame to check

for gaa leaks. A gas leak could cause a firs or explosion, resulting In damags, Injury or death.

1. Open manual shut-off valve located in gas supply line just ahead of furnace.

2. If necessary, adjust spark gap to 3/18" as shown in Figure 32. Pilot flame should cover 1/2" of tip of flame sensor.

3/16 INCH

SICTION 20 — ADJUSTING MANIFOLD PRiSSURI.

Equipment Needed: Save time by getting these tools before you start: Item number(s) 9,10,11,15,19 and 23 listed in Sec

tion 10.

WARNINOi Correct manifold pressure Is necessary for

proper ignition and burner operation. Use a "U" tube water manometer to measure actual gaa pressures. Failure to accurately adjust pressure could cause heat exchanger failure, asphyxiation, firs or explosion, resulting In dam* age, Injury or death.

A. Normal manifold pressures (gas control outlet pres

sures).

<3as. Supply

Natural gas Propane (LP) gas

Normal

3.5 inches W.C.

10.0 inches W.C.

CAUTIONi Many Installers* sat Propane (LP) manifold

pressure at 11.0 Inches W.C. Do not do this. It could

cause heat exchanger failure or nuisance callbacks.

Check gas supply line pressure first, following instruc

tions in Section 19A.

Connect a "U" tube water manometer to measure manifold pressure:

FIGURE 32

1. Turn off gas at manual shut-off valve located in gas supply line just ahead of furnace.

2. Remova outlet pressure tap plug from gas control.

3. Make sure shut-otf valve is in off position, then install 1/8”-pipe manual shut-off valve In hole vacated by plug.

4. Attach "U" tube water manometer to 1/8"-pipe manual shut-off valve just installed.

5. Turn on all gas appliances attached to gas supply line.

cause lighting or burning problems on any of the appliances.

2. Make sure gas control inlet pressure does not ex ceed 10.5 inches W.C. Use method in Section 19A to check gas supply line pressure.

3. Make sura all other gas appliances are off. You may leave pilots on. Start furnace following Operating In structions on front door or in Users' Information Manual.

6. Open manual shut-off valve in gas supply line just ahead of furnace. Start furnace following Operating Instructions on front door,

7. Open 1/8"-pipe manual shut-off valve leading to ma nometer.

8. Read manifold pressure on manometer.

9. Make small changes in manifold pressure within al lowable range (3.2 inches W.C. to 3.8 inches W.C.) by turning gas control regulator adjusting screw clock wise -> to increase pressure; turn counter-clockwise <- to decrease pressure. Make major changes in flow rate by changing main burner orifice size. See Sec

tion 23.

10. Turn off gas at manual shut-off valve in gas supply line just ahead of furnace. Install outlet pressure tap plug in gas control. Turn on gas.

11. Check regulator adjustment cover screw and gas

control plug for gas leaks. Use a commercial soap

solution made for leak detection.

WARNINOs Never use an open flame to check

for gas leaks. A gas leak could cause a fire or explosion resulting In damage, Injury or death.

4. As furnace warms up, watch gas supply line (gas control inlet) pressure using "U" tube water manom eter installed in gas control inlet pressure tap. Natu ral gas supply line pressure must still not exceed

10.5 inches W.C.

5. After verifying correct gas control inlet pressure, close shut-off valve in gas control inlet pressure tap. Move manometer connection to gas control outlet pressure tap. See Section 20. Open shut-off valve in outlet pressure tap. Let furnace warm up for 6 minutes.

6. Manifold pressure should be 3.5 inches W.C. Adjust by removing regulator cover screw on gas control. Save screw for reinstallation. Turn inner adjustment screw counter-clockwise <- to decrease manifold pressure; turn clockwise -> to increase manifold pres sure. Set correct manifold pressure. Install cover screw and tighten to torque of 5 inch-pounds to pre vent gas leakage.

7. Locate gas meter. Determine which dial has the least cubic feet of gas and how many cubic feet per revo lution it represents. This is usually one-half, one or

two cubic feet per revolution.

8. With stopwatch, measure time it takes to consume two cubic feet of gas.

SECTION 21 — CHECKING GAS INPUT.

Equipment Needed; Save time by getting these tools before

you start: Item number(s) 11,14,15,19 and 22 listed in Sectbn 10.

WARNING! Natural gas heating value (BTU/cu.ft.) can

vary significantly, therefore, it Is the installers* responsi bility to see that BTU Input to furnace Is adjusted prop erly. Failure to do so could cause heat exchanger failure, asphyxiation, fire or explosion, resulting in damage, in jury or death.

Underfiring could cause inadequate heat, excessive conden

sation or ignition problems. Overfiring could cause sooting,

flame impingement or overheating of heat exchanger.

A. Natural Gas. NOTE; For operations above 2,000 feet elevation, follow in

structions in Section 23. Before starting natural gas input check, obtain gas heat value

at standard conditions from local supplier.

1. Make sure gas piping is large enough for all appli ances connected to it to operate at once without

lowering main line pressure. Failure to do so could

a. If dial is one-half-cubic foot per revolution,

measure time for four revolutions.

b. If dial is one-cubic foot per revolution, mea

sure for two revolutions.

c. If dial is two-cubic feet per revolution, mea

sure for one revolution.

d. After determining the number of seconds for

two cubic feet of gas to flow through meter, divide this time by two. This gives average time for one cubic foot of gas to flow through meter.

Example: If it took 58 seconds for two-cubic feet to flow, it

would take 29 seconds for one-cubic foot to flow.

9. a. Use this formula to calculate gas input: Gas BTU/CU.FT. x 3,600

seconds per/hour

Gas Input =

Seconds for one cubic foot of gas

Btuh

Example:

Gas Input -

Assume it took 29 seconds for one cubic foot of gas to flow and heating value of 1,000 BTU/ CU.FT.

1,000 x 3,600

124,138 Btuh

If you left no other pilots on, this is the furnace

gas input.

If you left water heater, dryer or range pitots on,

allow for them in calculating correct furnace gas input. A quick way is to allow 1,000 Btuh for a water heater. Allow 500 Btuh for dryer and 500

Btuh for each range burner pilot.

Example:

If you left gas water heater, dryer, four range burner pilots and one oven pilot on, allow:

Water heater pilot

Dryer pilot 4 range burner pitot

1 range oven pilot

1.000 Btuh 500 Btuh

2.000 Btuh 500 Btuh

1. Make sure you have correct pilot orifics and main burner orifices. Be sure that gas piping is large

enough for all appliances connected to it to operate

at once without lowering the main line pressure.

Failure to do so could causa lighting or burning

problems on any of the appliances.

2. Gas control inlet pressure must be between 11 inches and 13 inches for propane (LP) gas. See

Section 19A to check gas supply line pressure.

3. Turn off all other gas appliances. Pilots may be left

on. Start furnace following Operating Instructions on front door or in Users' Information Manual.

4. As furnace warms up, watch gas supply line (gas

control inlet pressure) using "U" tube water manom

eter in gas control inlet pressure tap. See Section 19A. Supply line pressure must stili be between 11 inches and 13 inches W.C. for propane (LP) gas.

5. After verifying correct gas control inlet pressure,

close shut-off valve tn gas control inlet pressure tap. Move manometer to gas control outlet pressure tap. See Section 20. Open shut-off valve in gas control outlet pressure tap. Let furnace warm up for

6 minutes,

4.000 Btuh

Subtracting 4,000 Btuh from 124,138 Btuh

measured above equals 120,138 Btuh. This would be the correct furnace gas input after allowing for pilots left on.

10.

Manifold pressure may be adjusted within the range

of 3.2 inches W.C. to 3.8 inches W.C. to get rated

input. If you cannot get rated input with manifold pressure within the allowable range, you will need to change orifices. See Section 23.

11.

Turn off gas. Remove 1/8"-pjpe manual shut-off valves you used. Install 1/8”-pipe plugs In gas con trol inlet and outlet pressure taps. Tighten to torque of 50 inch-pounds. Turn on gas. Check both pipe plugs for gas leaks. Use a commercial soap solution

made for leak detection.

WARNINOi Never use an open flame to check

for gas leaks. A gas leak could cause a fire or explosion, resulting In damage, Injury or death.

B. Propane (LP) Gas.

WARNING t Propane (LP) gas Installations do not

have gas meters to double check Input rate. Measure manifold pressure adjustment with an accurate "U" tube water manometer. Failure to accurately adjust pressure could cause heat exchanger failure, as phyxiation, fire or explosion, resulting In damage,

injury or death.

6. Manifold pressure should be 10.0 inches W.C. +/-

0.3 inches W.C. Adjust by removing regulator cover screw on gas control. Save screw for re installation.

Turn inner adjustment screw counter-clockwise <to decrease manifold pressure; turn clockwise -> to

increase manifold pressure. Set correct manifold

pressure. Install cover screw and tighten to torque of 5 inch-pounds to prevent gas leakage.

CAUTIONi Many Installers' set propane (LP)

manifold pressure at 11.0 Inches W.C. Do not do this. It could cause heat exchanger failure or nuisance callbacks.

WARNINGS Propane (LP) gas Installsttons do

not have gas meters to double check Input rats.

You must measure manifold pressure adjustment

with an accurate "U" tubs water manometer.

Failure to accurately adjust pressure could cause hast exchanger failure, asphyxiation, fire or ex plosion, resulting In damage. Injury or death.

7. Turn off gas before removing the 1/8"-pipe manual shut-off valves. Install 1/8*-ptpe plugs In gas control inlet and outlet pressure taps. Tighten to torque of 50 inch-pounds. Turn on gas. Check both pipe plugs

for gas leaks. Use a commercial soap solution made for leak detection.

WARNINGS Never use an open flame to chock

for gas leaks. A gee leak could ceuee a fire or explosion resulting In damage, Injury or death.

NOTE: For operation at elevations above 2,000 feet, follow instructions in Section 23.

sicTiON aa — orifici sizi.

See Figure 33 for initial gas orifice sizes as shipped from factory.

sity of air is reduced, therefore, the furnace should be derated at the rate of four percent (4%) for aactl 1 >000 feet above sea level. It is the Installers' responsibility to see that the input is adjusted properly.

Initial Orifice Size

Mnput Natural Gas

BTU/HR ^Orifice Size

All size units

*See furnace rating plate located on blower door.

Check with your local gas supplier to determine heat value (BTU/CU.FT.) of gas in your area. Depending on your local heat value and elevation, you may need to adjust manifold pressure or change orifices to get proper gas input rate. See Section 23.

2.15mm

FIGURE 33

Propane

Orifice Size

1.30mm

SICTION as — DERATINO FOR HIGH AiTirUDES.

Equipment Needed: Save time by getting these tools before you start: ttem number(s) 3,7 and 23 listed in Section 10.

A. Installer responsibility.

For operation at elevations above 2,000 feet the den-

NATURAL GAS-ORIFICE SIZE CHART

if the gas supplier has not already derated the gas

BTU value, derating must be achieved by reducing the size of the main burner orifices. See Table 34 and 35 for proper sizing. Contact gas supplier for more infor

mation.

Adjustment of the manifold pressure to a lower pres

sure reading than what is specified in Section 20, Manifold Pressure Adjustment of this manual is con sidered to be an improper derate procedure. With a

lower density of air and a lower manifold pressure at the burner orifice, the orifice will not aspirate the proper

amount of primary air into the burner. Insufficient pri

mary air can cause incomplete combustion, yellow tip ping and quite possibly carbon build-up.

B. New orifice size.

See appropriate chart below to determine new orifice

size. To accomplish altitude derate, a natural gas orifice kit

containing the natural gas orifices indicated in Figure

34 is available through your supplier. A similar propane

(LP) gas orifice kit is available. Individual orifices are

also available in a convenient lot size. Use only these

orifices to assure proper performance.

Elevation

Gas Up to

Heat^

Value 2000

BTU/CU.FT. Feet

2001 3001

3000

4000

Feet Feet 800-849 850-899 900-949 950-999

1000-1049 1050-1100

NOTE: Shaded orifices above are not included in natural gas orifice kit. They are available separately.

2.25mm

2.20mm

2.15mm

2.10mm

2.20mm

2.15mm

2.10mm

2.05mm

*At standard conditions: 30:0 inches Mercury, 60*’F, Saturated.

2.20mm

2.15mm

2.10mm

2.05mm

2.00mm

4001

to to to

5000 6000

Feet Feet

2.20mm

2.15mm

2.05mm

2.15mm

2.10mm

2.05mm

FIGURE 34

5001

2.20

6001

7000 8000 9000

Feet Feet

2.20mm

2.10mm

2.05mm

2.00mm

1.90mm

PROPANE (LP) GAS—ORIFICE SIZE CHART

Elevation

Gas Up to

Heat*

Value 2000

BTU/CU.FT.

Feet

40,000-140,000 1.30mm

NOTE; All orifices above are included in propane (LP) gas orifice kit,

2001 3001

3000 4000

Feet Feet

1.25mm 1.25mm

4001 5001 6001

to to

5000 6000

Feet Feet

1.20mm 1.20mm

FIGURE 35

7000

Feet

1.20mm 1.15mm

7001

2.15mm

2.10mm

2.05mm

7001 8001

to to

8000 9000

Feet Feet

1.15mm

8001

Feet

9001

10000

Feet

2.05mm

185mm

9001

10000

Feet

1.10mm

C. Changing orifices.

WARNINOz Before changing orifices, turn off

electrical power and gas. Failure to do so could result In electrical shock or gas leak, resulting In damage, injury or death.

WARNING! Never use an open flame to check

for gas leaks. A gas leak could cause a fire or explosion resulting in damage, Injury or death.

15. Check gas input following Section 21.

SECTION 24 — ADJUSTING BLOWER SPEED..

1. Set room thermostat to its lowest or off setting.

2. Turn off electricity at electrical disconnect switch next to furnace.

3. Turn off manual shut*off valve in gas supply line just ahead of furnace.

4. Turn gas control knob clockwise -> to OFF posi tion.

5. Starting with burner farthest from gas control, re move burner screws and burners. Burners overlap. Burner farthest from gas control is on top. See Fig ure 36.

6. Remove original gas orifices.

7. First, hand thread new orifices into manifold. Do not cross-thread; then tighten to torque of 50 inchpounds.

CAUTION: Heating speed tap should not be reduced

below initial factory setting. Reducing speed tap setting may result in Inadequate air circulation, and could cause excessive air temperature rise through furnace. This could cause high-temperature limit switch to cycle burn ers on and off. This could reduce furnace efficiency and shorten life of heat exchanger and blower motor.

1. All models have four blower speeds available for use.

Motor speed designations are:

#1. High Speed (HI) #2. Medium High Speed (MH) #3. Medium Low Speed (ML) #4. Low Speed (LOW)

2. Determine initial heating and cooling speeds in sys

tem design stage. See Product Data sheet for air flow data. Depending on test results performed ir'

Sections 25 and 26, you may need to change blower motor speed.

3. Turn off electricity at electrical disconnect switch next to furnace.

WARNING: Failure to turn off electrical power

to furnace before changing blower motor speed could cause electrical shock resulting In dam

age, Injury or death.

8. Replace burners in reverse order from instructions

FIGURE 36

in Step 5,

9. Check burner carryover alignment. They should be touching but not overlap adjacent burner. Replace screws.

to. Turn gas control knob counter-clockwise <- to ON

position.

11. Open manual shut-off valve in gas supply line just ahead of furnace.

12. Set room thermostat to its highest setting.

13. Turn on electricity at electrical disconnect switch located next to furnace.

14. Check for gas leaks using commercial soap solu

tion made for leak detection.

4. Make blower speed changes at connector block lo cated at side of blower door. See Figure 37A.

FIGURE 37A

5. Never change the "C" common (WHT) wire.

6. To change cooling speed, black wire is moved to desired speed. Cooling speed is controlled through blower motor relay (BMR).

7. To change heating speed, brown wire is moved to desired speed. Heating speed is controlled through time delay relay (TDR). Heating speed should not be reduced below initial factory setting.

8. Turn on electricity at electrical disconnect switch located next to furnace.

SECTION 25 — MEASURING DUCT WORK STATIC PRESSURE.

Equipment Needed: Save time by getting these tools before

you start: Hern number(s) 20 listed in Section 10.

CAUTIONS High duct work static pressure may cause

low airflow resulting In poor heating performance and reduced heat exchanger life. Low airflow may also cause poor cooling performance.

Heating.

Measure duct work static pressure with cir

culating air blower on heating speed. Fol low instructions below.

Measure air temperature rise with circulat

ing air blower on heating speed. See Sec

tion 26.

Air Conditioning.

1. Measure duct work static pressure with cir culating air blower on air conditioning speed. Follow instructions below.

A. Preparing to measure duct work static pressure.

1. Open supply air registers and return air grilles. Make sure the registers and grilles are free of obstruction from rugs, carpets, drapes or furniture.

2. Set balancing dampers in supply duct system.

3. Check duct work for obstructions or leaks.

4. Make sure fitters are clean and in place. See Section 17 for filter information,

5. Make sure that blower speed taps are set for proper heating ar^d cooling. Рог heating operation, initial speed tap should be set in accordance with Figure 37B. For cooling operation, initial speed tap should be set in accordance with Figure 38. Refer to Sec

tion 24 for adjusting blower speed.

Air Temperature Rise Range

and Heating Operation Speed Taps

-BTU/HR/Motor

Input/ HP

Air Temperature

Rise Range (*’F)

40,000 / 1/4 50-80 40,000 / 1/3 60,000 / 1/4

60,000 / 1/3 60,000 / 1/2

80.000 / 1/4

80,000 / 1/3 80,000 / 1/2

80,000 / 3/4

100.000 / 1/3

30-60 LO 45-75 ML 45-75 LO 35-65 LO 50-80 MH 40-70 MH 50-80 LO 40-70 LO

55-85 MH 100,000 / 1/2 50-80 100,000 / 3/4 120,000 / 1/2 120,000 / 3/4 140,000 / 3/4 140,000 / 3/4

40-70 ML

45-75

50-80

Heating Operation

‘Speed Tap

MH MH MH MH

” These are initial Factory Settings. — See Furnace Rating Plate for BTU/HR input and

Motor H.P.

FIGURE 37B

2. Measure air temperature rise with circulat ing air blower on heating speed. See Sec

tion 26.

Air Conditioning Operation Speed Tap Settings

with 0.5" W.C. Ductwork Static Pressure

Air

input /

40,000 40,000 60,000 / 1/4 MH HI 60,000 / 1/3 60,000 / 1/2 — 60,000 80,000 / 1/3 LO ML

80,000 / 1/2

80,000 100,000 / 1/3 LO ML HI HI 100,000 / 1/2 — LO 100,000 / 3/4

120,000 / 1/2

120,000 / 3/4 140,000 140,000 / 3/4

1—1/2 2 2—1/2

/ 1/4 MH HI — —

/ 1/3

/ 1/4 H) HI

/ 3/4

—

— — — —

—

— — — — —

—

— — —

See furnace rating plate for BTU/HR input and motor H.P.

This table only gives initial speed tap settings for installations with ductwork static pressure of 0.5” W.C. figuring 400 CFM per ton of air conditioning. Ductwork with higher than 0.5" W.C. static pressure will cause reduced airflow and these speed tap set

tings will not be correct. To determine correct speed tap settings at ductwork static pressures above 0.5” W.C., see Product Data Sheet.

FIGURE 38

B. Measuring duct work static pressure.

1. Place slope gauge near furnace where level and adjust scale to read 0.00 inches W.C.

2. Insert one static pressure tap into supply air transi tion duct between furnace and cooling coil or in the supply air plenum for heating only systems. Insert other static pressure tap in return air plenum. See Figure 39.

3 3—1/2 4

—

MH HI

— — — — —

MH HI

—

— — — —

—

ML MH HI

— — —

ML MH HI

— ML

MH HI — —

LO ML HI LO ML ML HI LO

MH HI

— —

MH MH HI

HI — HI HI HI

ML HI HI

—

FIGURE 39

A, Preparing to measure air temperature rise.

Follow Steps 1 through 5 in Section 25A of this Manual.

B. Measuring air temperature rise.

Air temperature rise (warm air supply temperature mi

nus cold air return temperature) must be within allow

able air temperature rise range specified on furnace

rating plate and in Figure 37B.

Figure 37B shows heating operation speed tap. Fur nace is set on this speed tap when shipped from fac tory.

1. Place thermometer in supply air plenum approxi

mately 2 feet from furnace. Locate thermometer tip

in center of plenum to insure proper temperature measurement.

2. Place thermometer in return air duct approximately 2 feet from furnace. Locate thermometer tip in cen ter of duct to insure proper temperature measure ment.

3. Set room thermostat on highest temperature setting. Operate furnace 6 minutes. Record supply air and return air temperatures.

Connect pressure tap attached to supply air transi tion duct (warm air supply plenum) to positive pres sure side of slope gauge (bottom of scale). See Figure 39.

Connect pressure tap attached to return air plenum to negative pressure side of slope gauge (top of scale). See Figure 39,

Start blower on cooling speed by jumping terminals "R" and "G" on 24 volt terminal strip located on

furnace control box.

With blower running, read duct work static pressure from slope gauge.

NOTE: If air filter location is upstream of return air pressure tap, duct work static pressure must be adjusted by subtracting 0.08 inches W.C. to get ac tual duct work static pressure.

Duct Work Static Pressure

Duct work static pressure should not exceed 0.5 inches W.C. in order to insure proper volume of air flow.

Remove jumper wire between terminals "R" and "G" on 24 volt terminal strip. Remove pressure taps and seal holes in duct work. Failure to seal holes could result in reduced system performance.

= Measured Pressure -

0.08 inches W.C.

SECTION 26 — MEASURING AIR TEMPERATURE RISE.

Equipment Needed: Save time by getting these tools before you start; Item number(s) 21 listed in Section 10.

4. Calculate air temperature rise by subtracting return air temperature from supply air temperature.

5. a. If air temperature rise is below maximum tem

perature rise, heating system has sufficient air flow.

b. If air temperature rise is above maximum tem

perature rise specified in Figure 37B, more heating air flow ts needed. Change blower heating speed to a higher setting. Follow in structions in Section 24 to adjust blower speed.

CAUTIONS Operating furnace above maxi

mum air temperature rise may cause poor heating performance and decreased heat exchanger life.

6. Heating speed tap should not normally be reduced below initial factory setting. Some duct system con figurations and supply register locations may result in "cold blow". Setting heating speed tap to next lower speed may resolve this issue.

7. After making heating airflow adjustments, you must check air temperature rise following Steps 3 and 4 above to verify that resulting air temperature is within allowable range.

8. H air temperature rise is still above that specified on furnace rating plate and in Figure 37B, check duct work design with a qualified heating engineer. It may be necessary to resize the duct work. Recheck air temperature rise after revising duct system.

9. Set room thermostat to desired setting.

10. Remove thermometers and seal duct work holes. Failure to seal holes could result in reduced system performance.

SICTIOM 27 » CHICKING CONTROLS.

Equipment Needed: Save time by getting these tools betöre you start: Item number(s) 3 and 1fi listed in Section 10.

Before leaving the work site, check to see that all controls are functioning properly.

Follow these steps:

13. Turn off electricity at electrical disconnect switch located next to furnace. Remove jumper from termi nal strip, termirwils "R" and "G". Reconnect all room thermostat wires to original terminal strip, terminals. See Section 13.

14. Remove "U” tube water manometer from gas control and replace outlet pressure tap. Turn gas control knob counter-clockwise <- to ON position.

1. Turn off electricity at electrical disconnect switch next to furnace.

2. Turn gas control knob clockwise -> to OFF position.

3. Connect a "U" tube water manometer to gas control outlet (manifold) pressure tap.

4. Set room thermostat to its highest temperature.

5. Turn on electricity at electrical disconnect switch located next to furnace. Electronic ignition lockout module should start to spark pilot ignitor, but pilot burner should not light. Manifold pressure should remain at zero.

6. Electronic ignition lockout module should spark pi lot ignitor for given lockout time of module and go into lockout mode. Lockout time for Honeywell S8600H is 90 seconds maximum.

NOTE: Honeywell electronic ignition lockout mod ule will stop sparking whan module locks out.

7. Turn off electricity at electrical disconnect switch located next to furnace. Turn gas control knob counter-clockwise <- to ON position. Wait 10 sec onds for electronic ignition lockout module to reset.

15. Turn on electricity at electrical disconnect switch next to furnace. With main burners and blower op

erating, block off all return air grilles to restrict return air. Wait for primary limit control to cycle burners off.

16. Remove all restrictions from return air grilles. When

primary limit cools, burners should automatically reignite.

17. Set room thermostat to desired setting.

SRCTION 20 BLOWER TIMINGS.

Equipment Needed: Save lime by getting these tools before

you start; Item number(s) 5 listed in Section 10.

1. Blower on-time setting of heating relay is fixed at 20 to 30 seconds and is not field adjustable.

2. Blower off-time setting is adjustable through a range of 60 to 180 seconds. Blower off-time is factory set at 180 seconds.

3. If a shorter blower off-time is desired:

a. Turn off electricity at electrical disconnect switch

located next to furnace.

8. Turn on electricity at electrical disconnect switch located next to furnace. Pilot should light from spadt and ignite burners. Wait for main blower to start.

NOTE: To purge gas tines, it may be necessary to operate furnace through more than one lockout cycle at start-up.

9. Cycle electrical disconnect switch next to furnace on and off. Watch at least three ignition cycles. Pilot should light from spark and light main burners within 10 seconds.

10. Burner flames should look the same with circulation blower on and off. If not, turn gas control knob

clockwise -> to OFF position.

11. Turn off electricity at electrical disconnect switch located next to furnace. Disconnect all room ther mostat wires at control box terminal strip. To start blower on cooling speed, jump terminal strip, termi nals "R" and "G". Turn on electricity at electrical

disconnect switch next to furnace.

12. Using a match flame check for air leaks between bulkhead and blower deck, under burners and up each side where bulkhead mounts to casing. Tighten screws until air teaks stop.

b. Remove control box cover and locate heating

relay in control box. Turn the dial counter

clockwise <- to desired setting.

FIGURE 40

4. Install control box cover.

5. Turn on electricity at electrical disconnect switch next to furnace.

SECTION ao — MAINTAINING FURNACE IN GOOD WORKING ORDER.

WARNINOx Follow these procedures before Inspect

ing furnace.

• Turn room thermostat to its lowest or off set ting.

* Turn off manual gas shut-off valve. * Wait at least five minutes for furnace to cool If It

was recently operating.

• Turn off furnace electrical power; failure to do

so could result In injury or death.

WARNING! Use replacement parts listed In parts list.

Failure to do so could cause Improper furnace opera tion, resulting In damage, Injury or death.

Perform periodic preventive maintenance once before heating season begins and once during heating season. Inspect, clean, and repair as needed following items:

1. All combustion and ventilation air openings into fur nace space.

2. All burner combustion air openings.

3. All burners, pilot, collector box, draft inducer as sembly and complete vent system.

4. All gas pipes leading to furnace.

5. All electrical wiring and connections, including elec trical ground.

6. All supply air and return air ducts for obstructions, air leaks and loose Insulation.

7. Blower housing, motor and wheel, air filters, air conditioning and draft inducer motor. Blower motor and inducer motor do not require oiling.

A qualified service technician should follow these steps to remove blower assembly.

a. On downflow furnaces, remove vent pipe inside

furnace.

b. Disconnect wires from low voltage terminal strip

on control box.

c. Remove two screws holding control box to the

side brackets. d. Remove blower door. e. Locate connector block beside blower door on

control box side. Remove it by squeezing lock

ing ears of connector block. See Figure 41.

f. Disconnect wires to limit switches on blower

housing.

g. On dual blower wheel models, disconnect wires

to door switch.

h. Remove screws holding blower assembly to

blower deck.

(. 1. Blower assembly will now slide out. DO

NOT damage limit switches on bottom of blower housing.

2. After cleaning blower assembly, reassemble in reverse order making sure speed selec tions are in original positions.

8. Assure the furnace is operating properly and safely.

SECTION 30 — GETTING OTHER INFORMA TION AND PUBLICATIONS.

These pubiications can help you install the furnace. You can usually find these at your local library or buy them directly from the publisher. Be sure to consult current edition of

each standard.

National Fuel Gas Code

National Electrical

Standard for the

installation of Warm Air

Heating and Air

Conditioning Systems

Fireplaces, Vents, and

Solid Fuel Burning

Appliances

For more information, contact these publishers:

ANSI: AMERICAN NATIONAL STANDARDS

INSTITUTE 1430 Broadway New York, NY 10018 (212) 354-3300

ASHRAE: AMERICAN SOCIETY OF HEATING

REFRIGERATING AND AIR CONDITIONING ENGINEERS, INC.

1791 Tullie Circle N.E. Atlanta. GA 30329 (404) 636-8400

NFPA: NATIONAL FIRE PROTECTION

ASSOCIATION Batterymarch Park Quincey, MA 02269 (617) 770-3000

ANSI Z223.1/NFPA 54

ANSI/NFPA Code 70

ASHRAE/NFPA 90

NFPA211Standard for Chimneys,

INSTALLERS’ MANUAL

NOTES:

VENTING TABLES CATEGORY 1 CENTRAL FURNACES

ACiA

American Gas Association gama

GAS APPLIANCE MANUFACTURERS ASSOCIATION

REVISED; JULY,1991

920101

7507-183

405740 A

GAMA VENTING TABLES

FOR

CATEGORY I CENTRAL FURNACES

This booklet contains new venting tables designed specifically for use with Category I central furnaces. These tables are unique, in that, industry wide venting tables now exist for fan-assisted combustion system central furnaces. Venting tables for these types of appliances are not contained in the National Fuel Gas Code (NFPA 54/ANSI Z223.1-1988).

All requirements contained in this booklet apply to both Category 1 drafthood equipped central furnaces as well as fan-assisted combustion system central furnaces. At no time should a venting system for a listed Category 11, 111, or iV central furnace be sized with these tables. The National Fuel Gas Code (NFPA 54/ANSI Z223.1-1988) may also be used to size venting systems for drafthood equipped central furnaces. However, at this time, the National Fuel Gas Code does not include alternate sizing methods for fan-assisted combustion systems. Therefore, until engineering data is developed to allow alternate sizing methods

for Category I fan-assisted central furnaces, the enclosed venting tables must be used

for fan-assisted combustion system central furnaces. These tables apply to venting single appliances and common venting multiple appliances in both metal and masonry chimneys.

The new venting tables were developed by Battelle under contract (GRÎ-5088-245-1728) to the Gas Research Institute (GRI). The computer program (VENT-11) developed by Battelle Columbus generated the venting tables in this booklet and this procedure has been accepted by the American Gas Association Laboratories as an appropriate engineering methodology for determining venting requirements of Category I central furnaces,

For your information, the general venting requirements listed in this booklet are not intended to be used as complete installation instructions and represent only a partial list of venting considerations.

For venting applications that fall outside the parameters of the new venting tables, refer to the furnace manufacturer's complete installation instructions, the specific vent manufacturer's complete installation instructions, and state and local codes.

GRI DISCLAIMER

LEGAL NOTICE: This information is, in part, a result of work performed by Battelle under the

sponsorship of the Gas Research Institute (GRI). Neither GRI, members of GRI, nor any person acting on behalf of either:

a. Makes any warranty or representation, express or implied, with respect to the accuracy,

completeness, or usefulness of this information, or that the use of any apparatus, method, or process disclosed may not infringe privately owned rights; or

b. Assumes any liability with respect to the use of, or for damages resulting from the use of,

any information, apparatus, method, of process disclosed.

VENTING REQUIREMENTS FOR CATEGORY I APPLIANCES

INTRODUCTION

This booklet contains the current definitions, instructions, and tables necessary to vent todays modern Category I Gas Fired Appliance. A variety of definitions of new terms describing today's gas appliances are included to supplement the actual venting tables which have been generated to correctly vent various combinations of Category I Appliances using Type B or single*wall metal vent connectors attached to Type B vents or masonry chimneys. Tables are also included covering similar venting material combinations when applied to common venting arrangements of two or more appliances.

Finally, a series of examples are presented demonstrating how the vent tables are used to size the vent connector and the vertical vent for a variety of typical applications.

I I. DEFINITION OF TERMS

Tan Assisted

Combustion System"

An appliance equipped with an integral mechanical means to either draw or force products of combustion through the combustion chamber and/or heat exchanger.

"FAN Min"

refers to the minimum appliance input rating of a Category I appliance with a fanassisted combustion system that could be attached to the vent.

"FAN Max"

refers to the maximum appliance input rating of a Category I appliance with a fanassisted combustion system that could be attached to the vent.

"NAT Max"

refers to the maximum

appliance input rating of a

Category I appliance equipped with a drafthood that could be

attached to the vent. There are

no minimum appliance input

ratings for drafthood-equipped

appliances.

"FAN+FAN"

refers to the maximum

combined input rating of two or

more fan-assisted appliances

attached to the common vent.

"FAN+NAT" refers to the maximum

combined input rating of one or more fan-assisted appliance and one or more drafthoodequipped appliance attached to the common vent.

"NAT+NAT" refers to the maximum

combined input rating of two or more drafthood-equipped appliances attached to the common vent.

"NR" means not recommended due

to potential for condensate formation and/or pressurization of the venting system.

"NA" means not applicable due to

physical or geometric constraints.

DraftHood A device built into an appliance,

or made a part of the vent connector from an appliance, which is designed to (1) provide for the ready escape of the flue gases from the appliance in the event of no draft, backdraft, or stoppage beyond the drafthood, (2) prevent a backdraft from entering the appliance, and (3) neutralize the effect of stack action of the chimney or gas vent upon the operation of the appliance.

Vent

A passageway used to convey flue gases from gas utilization equipment, or their vent connectors, to the outside atmosphere.

Vent Connector The pipe or duct which

connects a fuel-gas burning

appliance to a vent or chimney.

Flue Collar

That portion of an appliance

designed for the attachment of

a drafthood, vent connector, or venting system.

Categorized Vent Diameter

The minimum vent diameter permissible for Category t appliances to maintain a nonpositive vent static pressure when tested in accordance with

nationally recognized standards.

) ) I. GENERAL VENTING REQUIREMENTS

All requirements contained in this document apply to both Category 1 draft hood equipped and fan-

assisted combustion appliances. At no time should a venting system for a listed Category 11, 111, or IV appliance be sized with these Tables. The alternate sizing methods described in the National Fuel Gas Code (NFPA54;aNS1 Z223.V1988) may also be used to size the venting system for a drafthood equipped appliance. At this time, alternate sizing methods have not been developed for tan-assisted appliances. Therefore, until engineering data is developed to allow alternate sizing methods for Category I fanassisted appliances, the vent tables must be used.

1) The venting tables included in this instaiction apply to vents and chimneys internal to the

structure below the roof tine. Exterior chimneys or vents not enclosed by the structure or a chase below the roof line may experience continuous condensation depending on locality. Consult local gas utility, appliance manufacturer and/or local codes. A chimney with one or more sides exposed to the outside of the structure is considered to be an exterior chimney. A Type B or listed chimney lining system passing through an unused masonry chimney flue is not considered to be exposed to the outdoors

2) If the vent or connector size determined from the tables is smaller than the appliance drafthood outlet or flue collar, the smaller size may be used provided:

^ The total vent height "FT is at least 10 FT.

3) Single appliance venting configurations with zero lateral lengths, Tables 1 & 2, are assumed to have no elbows in the vent system. For all other vent configurations, the vent system is assumed to have two 90® elbows. For each additional 90® elbow, or equivalenr beyond two, the maximum capacity listed in the venting table should be reduced by 10 percent (0.90 x maximum listed capacity).

* Two 45® elbows are equivalent to one 90® elblow.

4) The common venting Tables 3, 4, 7, & 8 were generated using a maximum horizontal vent connector length of 1 1/2 feet (18 inches) for each inch of connector diameter as follows:

CONNECTOR DIAMETER

MAXIMUM HORIZONTAL

CONNECTOR LENGTH

(INCHES) (FEET)

3 4 5 6

4 1/2 6 7 1/2 9

7 10 1/2

8 9

13 1/2 10 15 12 18 14 16

24 18 27

22 33 24

b) Vents or connectors for appliance

drafthood outlets or flue collars 12

inches in diameter or smaller are not reduced more than one table size (e.g. 12 inches to 10 inches is a one size reduction).

c) Vents or connectors for appliance

drafthood or flue collars above 12

inches in diameter are not reduced more than two table sizes (e.g. 24 inches to 20 inches is a two size reduction).

d) The maximum capacity listed in the

tables for a fan-assisted appliance is

reduced by 10% (0.90 x maximum

capacity).

e) The drafthood outlet is greater than 4

inches in diameter. Do not connect a 3

inch diameter vent or connector to a 4

inch diameter drafthood outlet. This provision does not apply to fan-assisted appliances.

The vent connector should be routed to the vent utilizing the shortest possible route. Connectors with longer horizontal lengths than those listed above are possible under the following conditions:

a. The maximum capacity (Fan Max. or Nat

Max.)of the vent connector shall be reduced 10% for each additional multiple of the length listed above. For example, the maximum length listed above for a 4 inch connector is 6 feet. With a connector length greater than 6 feet but not exceeding 12 feet, the maximum capacity must be reduced by 10% (0.90 x maximum vent connector capacity). With a connector length greater than 12 feet but not exceeding 18 feet, the maximum capacity must be reduced by 20% (0.80 x maximum vent capacity).

b. The minimum capacity (Fan Min.) shaH be

determined by referring to the corresponding single appliance table (Tables 1 and 2). In this case, for each appliance the entire vent connector and common vent from the appliance to the vent termination would be treated as a single appliance vent, as if the other appliances were not present.

5) If vent connectors are combined prior to entering the common vent, the maximum

common vent capacity listed in the common venting tables must be reduced by 10%. the equivalent of 1 (one) 90® elbow (0.90 x maximum common vent capacity). See Figure

11 The horizontal length of the common vent

connect or manifold (L) should not exceed

1-1/2 feet (18 inches) for each inch of

common vent connector manifold diameter.

6) If the common vertical vent is offset as shown in Figure 8. the maximum common vent

capacity listed in the common venting tables

should be reduced by 20%, the equivalent of 2 (two) 90® elbows (0.80 x maximum common vent capacity). The horizontal length of the offset shall not exceed 1 1/2 feet for each inch of common vent diameter.

GAS VENT TERMINATION TABLE

ROOF PITCH FLAT TO 7/12 OVER 7/12 TO 8/12 OVER 8/12 TO 9/12 OVER 9/12 TO 10/12 OVER 10/12 TO 11/12 3.25 FEET

OVER 11/12 TO 12/12 OVER 12/12 TO 14/12 OVER 14/12 TO 16/12 OVER 16/12 TO 18/12 OVER 18/12 TO 20/12 7.5 FEET OVER 20/12 TO 21/12

* THIS REQUIREMENT COVERS MOST INSTALLATIONS

MINIMUM HEIGHT

1.0 FEET *

1.5 FEET

2.0 FEET

2.5 FEET

4.0 FEET

5.0 FEET

6.0 FEET

7.0 FEET

8.0 FEET

7) The common vent diameter must always be at least as large as the largest vent connector diameter. All interconnection fittings must

also be the same size as the common vent.

8) Type 6 gas vents shall terminate above the roof surface with a listed cap or a listed roof assembly in accordance with the terms of their

respective listings and the vent manufacturer's instructions.

VENT CAPS 12" AND SMALLER Listed gas venting systems using listed vent caps 12" and smaller in size may terminate in accordance with the VENT TERMINATION

TABLE. (SEE FIGURE 1)

VENT CAPS LARGER THAN 12" Listed ve/it caps larger than 12" must be

located at least 2 feet above the highest point and at least 2 feet higher than any portion of a building within a horizontal distance of 10

Feet. (SEE FIGURE 2)

9) Use sea level input rating when determining maximum capacity for high attitude installation. Use actual input rating for determining minimum capacity for high attitude installation.

10) No portion of the venting system can extend into, or pass through any circulating air duct or plenum.

11) All vent pipe passing through floors, walls, and ceilings must be installed with the listed clearance to combustible materials and be fire stopped according to local codes. In the absence of local codes, refer to NFGC (2223.1)

12) Vent connectors serving Category 1 appliances shall not be connected to any portion of mechanical draft systems operating under positive pressure such as Category 111 or IV Venting Systems.

13) A Category I appliance must never be connected to a chimney that is servicing a solid fuel appliance. If a fireplace chimney flue is used to vent this appliance, the fireplace opening must be permanently sealed.

14) A vent connector shall be supported without any dips or sags and shall slope a minimum of

1/4 inch per lineal foot of connector, back

towards the appliance.

15) Vent connectors shall be firmly attached to drafthood outlets or flue collars by sheetmetal screws or other approved means, except vent connectors of listed Type B vent material which shall be assembled in accordance with the manufacturer's instructions. Joints between sections of single wall connector piping shall be fastened by sheet-metal screws or other approved means,

13) For single appliance vents: a) If the vertical vent or tile lined chimney has a

larger diameter or flow area than the vent connector, use the vertical vent diameter to determine the minimum vent capacity and the vent connector diameter to determine the maximum vent capacity. The flow area of the vertical vent, however, shall not exceed 7 times the flow area of the listed appliance categorized vent area, drafthood outlet area or flue collar area unless designed in accordance with approved engineering methods. See Table 9 for calculated areas.

b) For multiple appliance vents:

The flow area of the largest section of vertical vent or chimney shall not exceed 7 times the smallest listed appliance categorized vent

area, flue collar area, or draft hood outlet area unless designed In accordance with approved engineering methods. See Table for calculated areas.

Maximum vent or tile lined chimney flow area = TTfD*)^ x 7

* Drafthood outlet diameter, flue collar diameter, or listed

appliar^ce categorized vent diameter.

c) In no case, shall the vent connector be

upsized more than 2 consecutive table size

diameters over the size of the drafthood outlet, flue collar outlet, or listed apppliance categorized vent. Example: An appliance

with a 4 inch diameter flue outlet collar or

drafthood outlet cannot be vented with a connector diameter larger than 6 inches.

16) When the vent connector used for Category 1 appliances must be located in or pass through a crawl space or other area which may be cold,

that portion of the vent connector shall be of

listed double-wall Type B vent material or material having equivalent insulation qualities.

17) The entire length of sirigie wall metal vent

connector shall be readily accessible for

inspection, cleaning, and replacement.

18) For appliances with more than one input rate, the minimum vent or connector (Fan Min) capacity determined from the tables shall be less than the lowest appliance input rating and the maximum vent or connector (Fan or Nat Max.) capacity determined from the tables shall be greater than the highest appliance

input rating.

20) Masonry chimneys used to vent Category I central furnaces must be either tile-lined or

lined with a listed metal lining system or

dedicated gas vent. Unlined masonry chimneys are prohibited. (See Note 1).

21) A fan assisted furnace may be common vented into an existing masonry chimney provided:

a. The chimney is currently serving at least

one drafthood equipped appliance.

b. The vent connectors and chimney are

sized in accordance with Tables 7 & 8.

SINGLE APPLIANCE VENTING OF A FAN ASSISTED FURNACE INTO A TILE LINED, MASONRY CHIMNEY IS PROHIBITED, THE CHIMNEY MUST FIRST BE LINED WITH EITHER TYPE B VENT SIZED IN ACCORDANCE WITH TABLES 1 OR 2 OR A LISTED, SINGLE WALL, METAL LINING SYSTEM, SIZED IN ACCORDANCE WITH NOTE 22.

22) Listed, corrugated metallic chimney liner systems in masonry chimneys shall be sized by using Tables 1 or 2 tor dedicated venting and Tables 3 or 4 for common venting with the maximum capacity reduced by 0.20%

(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 the vent maximum capacity (See Note 6).

27) Numbers followed by an asterisk (*) in Table 6, indicate the possibility of continuous condensation, depending on locality. Consult appliance manufacturer, local serving gas supplier, and/or authority having jurisdiction.

28) In a single run of vent or vent connector, more than one diameter and type of pipe are permitted to be used, provided that all the size are permitted by the tables.

23) For multiple units of gas utilization equipment all located on one floor, available total height

"H" is measured from the highest drafthood outlet or flue collar up to the level of the cap or terminal. Connector rise "R" is measured from the drafthood outlet or flue collar to the level where the vent gas streams come together. (Not applicable to multi-story).

24) For multi-story installations, available total height for each segment of the system *'H" is

the vertical distance between the highest drafthood outlet or flue collar entering that

segment and the centerline of the next

higher interconnection tee (See Figure 13).

25) The size of the lowest connector and of the

vertical vent leading to the lowest

interconnection of a multi-story system must be in accordance with Table 1 OR 2, for available total height "H" up to the lowest interconnection (See Figure 14).

26) Common vents in multi-story systems shall be

type B when used in multi-story systems and have no offsets.

TYPICAL VENTING APPLICATIONS

29) If the desired vent height and connector rise and/or lateral are between the table entries, linear interpolation is permitted for calculation of the permissible appliance input ratrings.

Extrapolation beyond the table entries is not

recommended. (See Example 7)

30) All combinations of pipe sizes, single-wall, and double-wall metal pipe are allowed within any connector rur\(s) or within the common vent

provided ALL of the appropriate tables permit

ALL of the desired sizes and types of pipe, as

if they were used for the entire length of the

subject connector or vent. I! single-wall and Type B double-wall metal pipe are used lor vent connectors, the comnrion vent must be

sized using Table 4.

31) Locate draft hood outlet or flue collar of smallest input appliance closest to or under common vent.

32) When vent table permits more than one diameter of pipe to be used for a connector or vent, the smallest permitted diameter should be preferred.

Table 1 should be used when Type B vent is

used for both the vent connector and the vertical vent.

Table 2 should be used when a single-wall

metal vent connector is attached to Type B

vertical vent.

Tabi* 3 should be used when Type 6 vent connectors are attached to a Type В common vent.

Table 4 should be used when single-wall metal vent connectors are attached to a Type В common vent.

TabI« 5 shall be used when a Type 6, doublewait venl tx>nnector is attached to a tile lined masonry chimney.

Table 6 shat) be used when a single-wait metal vent connector is attached to a tile lined

masonry chimney.

FIGURE 9

FIGURE 10

VENT TABLES

Capacity of Type B Double-Wall Vents with Type B Double-Wall Connectors

TABLE 1

3”

Height Laterai

H L FAN

(ft)

6 0 0 78 46 0 152 86 0

10 0

20 0

30 0

100 0 NR

Min

(ft)

2 13 51 4 21 6 25 46 32 36 91 61 47

0 0 84 50 0 165 94 0 2 12 57 40 5 23 53 38

8 28

23 57 40

0 2

11 69 48 15 136 93 20

29 59 41 40

10 75 51

5 21 71 10 28 15 34 58 40 46

20 48 52

21 27

10 15 33 64 NR

20 56 58 NR 53

30 NR

2 8 86 61 11 183 122

5 20

10 15 59 70 NR 42 158

20 NR 30 NR

5 NR 10 NR 15 NR NR

NR NR

NAT FAN NAT FAN

Max

Max Min Max

36 34 30 94

35 39 98

88 53 0 175 61 42 17 118 81 23 194 129 26 289

51 36

94 58

45 30

37 48 112 76

0 100 64 0 9

0 101

61 0 202

48 29

44 38 133

81 56 13 166 77 54 28 160 108

50 37

67 0 216

82 76 NR 35 168 114 45

NR 50

NR 69 131

NR NR NR

NR NR NR NR

NR NR

Appliance Input Rating in Thousands of Btu Per Hour

Max

18 97 67

64 39 153 103 50

16 109 75

103

32 113 77

41 104

0 191 112 0

55 116 78

71 42 171 115 53 66

100 0 295 166 0

70 54 176 115

130

87 39 219 142 49

121 82

119

100

149 143

96 89

124

213

128 0

150 102 48

44 141

73 113 NR

0 10 194 NR 26 33 182 NR 40 174 47 166

NR NR

96 90 66 237 154 80

132

134

177 319 35

149 NR

218 NR

189 NR

NR NR

Sen/ing a Single Category I Appliance

Vent and Connector Diameter - D (inches)

Min

51 164

41 187

51 206 61

18 250 166 20 38 50 229

59 217 142 73 337 217 94 481 308 69 206 134 84

36 275 176 45 421 273 58 600 385

54 287 180 66 63 84

12 33 347 43 50 59 311

78 290

NR NR NR 147 428

NAT

Max MaxMax

Max

141

251

157 105

100 59 223 149 78

149

276 155 0 415 235 178 120 28 263 180

109

124 52

327 187 226

150 22 339 225 38

135

195 128 76 301 198 98 429 275 115

0 349 202 0 540 307 0

242 160 47 367 241 62 519 337 73 697

150 62 351 228 81 499 321 95

374 220 0 587 336 0 283 185 18 432 280

171

262

163 70

249

214 NR 104

0 397 232 0

320 206 15 497 314

200 43 487 308

312

190 56 471

299

275 169 76 440 278 250 NR 99 410 259

0 407

354

NR 335 NR 53 321 NR

6" 7" 8"

FAN NAT

375 205

32 232

64 247

67 267

0 502 285 0

64 315

59 405

0 665 400 0 997

62 71 92

157

227

153

255

173

165

447

255

195

280

188 68

175 88

330 217 64 463

208

377

249

206 107

322

261 77 580 371

389 249

237

374 346 219 131

633

455

566 557 369 52 542 528 353 80 513

483 NR 115

102 542 343 119 743 473 139 977 628

363 0

298 288

123 605

375

361

344

180 651 405 197 944

FAN NAT FAN NAT FAN NAT

Max

0 524 285 0 698 370 44 66 316

42 365

70 84

40 402

84 445

33 531 346 41

27 613

90 560 357 105

22 715 55 702 73 681 426 86 85 662 413 97

217

321

211

310 205 93 413 583

320 0 780 415 0 1006 537

247 356 237 347 227

0 631 345 0

273 392

263 376

245 716

390 475

316

300

288 99

776

430 0 1057 575

464

295

853

475 0

394

507

321 149 702

518 0 1297 708 0

932

445 26

438

642 401 113 888 556 131 1176 722

376 141 844

560

831 510 21 1155

820 504 60 1141

801 493 80 1118 679 94 1492 910

782 482 93 1095

471

763 726

449 131 1029 627

Max

Min

53 79 419 279

50 483 83 473 99 463

48 533

81 522

104 504 330 122.651

45 633 414

76 620

111 654

125 634 410 145 830

33 69

65 960 605

100

105 1073

Max Min

285

425

273 110

322 60 313 99

303

847

450 0 355 346

0 970 525 0 1253 682

403

600 386 116

373 134 755

580

470

711

460 86 902 599 443

675

427

650 0

1173

826 535

811 524

788 507 107

490 124

765

444 17!

615

975

935 589 101 1230 773 911 572

522

0 1411

770 700 692

666 653 122 1438 880

575

Mix ftax

897

470

63 543 370

536

117 596 396

57 95

53 90 800

50 917 612

112 877 576 129 853

42 82 1055

33 1276 813 77

117

161

25 1536 935

109

149 217

362

530

354

619 418 607 407

1096

585

684

457

671

446

427

815 544

529

777

507

491

0 1384 752

557 537

855

1548

700

1072

688 668

1028

648

1002

594

929

1730 952

1259 798

747

1203

670

1125

1040

1908

926

1519

895

1465 1387 849

787

1288

VENT TABLES

Capacity of Тура В Doubla-Walt Vants whh Тура В Doub(a-Wall Connectors

TABLE 1 <Conrd)

1<T 12"

Heigtu Lami Í

(ft)

100

___

(ft)

110 661

6 m 661 435 0 0 1261 660 0 1838 970 0

г 71

5 113 738 503

137

112

10 142

<3 1019 675 86 1493 985

S 103 1003 660 140 10 135 IS

153

0 0 1756 930 0 2637 1350 0 2 59

3 101 1133 738

iO 130 1103 710 172

ISO

167

0 0 2 54 1351

5 96 10 125 13 143 1272 807

160

193 1189 745 246

0 0

41 1620 1010

5 90 10

IIS

136 20 ISl 1505 924 19S 30 183

0 2

82 10 108 1923 1142 142 2961 1775 180 IS 126 1892

141

20 30 170

241 16»» 1000 292 2657 15S0 350

NAT PAN NAT FAN

PAJ* -

№

1121 570 0 1643 850 0

675 455 103

770 515 9« 1124 745 13Q 746

1377

832 560 93 1244 850 839

»17

1596 »40

977 635 177 953 610 202 1418 905

1130

107»

1032 1977 1060

1332 1301

1143

2231 1193

1600 1567 1536 94» 177 2327 1437

1446

2491 1973

1935

1861 1802

Min

Mtt

147

445

171

134

490 180 1097

• m

547

149 1«7

525

753

135

6»»

195 1609

663 217 1371

865 »51 127 1981

164 1944 12S4

129

187 1908 1220

207 1873

784

996 US

154

972

■76 232

1310 0 3923 2050 0

1170

107 3002 1803 136

1159 1124

Ш 2920 1747 206 1107 181 1071 213 2803 1663 265

Mm Mn

9»2 650 973 640 191 967

630 219

ino 733 199

720 231

2036 1060

829

1229 1204 795 23»

2380 1240

967 182

1476 1446 936 227

1694 noo 107 1674

1079

1641 1045 220

1018 24»

990 273

3004 1550 0

2004 1310

1U9

1185

1807 1130 3441

1825

2431

1513

2406

1495

2366

1466

22U

1408

2214

1349 287

302? 1820 72

2880

1719 226

Serving a Single Category I Appliance

V«nt ind Connector Diameter - D (tnchct)

I*- 16"

Appliance Inpnt Ballni In Tliantanda of Bln Per Hoar

NAT FAN NAT

Mn Mm

2267

138

124 192

114

257

174

164 209 237

260

305

151 196

222

244

1170 0

1346

»90 П8 1769 mo 223

1338

880 242 1761 1160

1330 870 276 1733 П50 2571 1320

1543 lOZQ 168 2030 1340 212 1328

1010 231 2013 13» 311

1514

1000

2825 1430 0 3742 1923 0 4712 2450 1713 П30 161 2236

nos

1696 1669 10»0 298

3323 1720 0

1350

2062 2041 1327

2009 1289 283 1976 1230 318

3701 1900

1320

2343

2320 1498 219 3071 1978 270

1460 273

2282 2245 1425 306 2988 1910 2210 1390 335 2948 1880

4232 2170 0 5725 2920 0 7420

2786 1800 127 3696 2380 159 2759 ms 206 3666

2716 1733 259 3617 2300 316 4647 2970

2674

1692 292 3570 22»

2633 1650 319

1585

2555

4934

2550 3409 2125 3380

2102 191 3332

206* 243 3285 2026 3239 1987 3150 1910

5729 2950 0

4313 2350 4282 2531 4231 2500 223

4182

2*69 252

4133

2438.

4037

2375 3856

2250 415 S2B9

Mu Mu Mb

2983 13» 0 3802 I960

0 3399 1740 0 4333 2220

2000 1320

289

2238 1461 300 2849

24Э

2209

2270

4423

147

2719

229

2696 2659 2623 1675

4941

139 3097 2000

2520 0 6376 3250

3029

2350 252 4701 3020

2200

3523

369 3433

113

274 300 347

172

277 3619 3331 330

319

2130 440 4442 2785

0 6711

3440 4354 2840 141 3864 4520 тъ 4464

2767 295 4409 4356 2675 361 4253 2631 412 3523

7914 4050 0 10483 5834 3500 120 5797 3737 3434

567»

5503

FAN NAT

300 2242 1473

341 2235 1470

354

1480 202 2168

364

1430

1770 186 1748 1712 346 3402

0 5678 283 383 3363 2150 479

175 334

1940

372 3835

404

354 4394 2920 384

0 8Л4 4460

234

3»

2721

3475 208

268 30* 7409

3392 3267

378

3100 486 6956 4050

2250 1480

2384

1700

2363

1683

2532 1670

1890 1871 1840

2818

2900

3467

2260 2235

3442

2193

2370

3953

2544

3926

2500

3880

2465 2430

3791

3770

4734

3050

2870

4342

3670

5826 3639

3585

5763 5701 3534 5641

3481

3431 5300 0 13434

4600

7591

4366

7548 7478 4509

4451

7341 4394 7209 4279

- PAN_

296 390 437

278 398 3180 2090 476 3863

264 3536

382 459

239 355 4278 2777 432

220 337 413

459 495

199

312

386 5803 3739 456 431

467

NAT

Mu Mb

4721 2430 0 3737

2782

1850 360

2774

1835

2767

1820

5387 27»

3196

2110 336

4»

3163 2070 537 38» 25» 630 4602 5«5 3050 0

2340 319 4322 2840

3536

2318 458

3504

2280

0 7099 3620 0 8665 4410

4304

2800

4234

2739 2700

4192

7988

4060 0 9785 4980 011733 3200 269

4916

3174 403

4885

3130 489 5896 3830

4835

3C90

4786 4737 3030 585 3792 3760

0 9341 4750

5900 3810 241

3783

5863 5744 3695

5686 36» 548

22"

- FAN

469 323 3363

546

290 5232 Я10 346 6251 426

SIO 5159 3343

564

341 5844

373 7155 4622 307 7026 4527

NAT FAN

Mu Mu

29»

337?

2220 426 4030

3370 221S 535 4023

2210 618 4017

0 6533 3360

3882 2560

2545

7254

3710 0 8682

430)

2818

4268 7П80

5204

3385

5115 3300 663 6129

3983

3910 3880 475 7119

59»

3795

011483

5850

7194

4650

7090 4574

6964

4480

540 5574 3365 635 6842 4375

on 129 5635

171 7339 4630 209 8980 5695

7295 4597 336 8933

7224

335

396 7135 4511 433 7086 494

138

243 9528 3769 293 11748

318 9447

358 9367 5665 41811569

387

446 9136

572

4»2 419 8855 5385 4479

6933 4421

6700 016817

9577 5800

3717 5613 452 11482

9289

5309

8841

S300 65^ icfm

013767 6940

5654

463 306 8704 5506 386 10488

577

16911803

374 11638

514 11310

, ,,

5Я6 542 10570

8779

5444

8557

1600 7200 7162 7100 436 14103 7037 487 140008610

6975 323 13910

68» 6600

24-

NAT

Mn Mu

0 6853

3520 2670 2660 2630

0 7838 4010

401 46Я

562 4612

378 3153

340 3132 337) 641 5099

301 6222

599 6175

321 7154 4700 573 7063

631 7000 4575 689 6953

283 8617 439 8574 533 8305

590 8437

639 8370

739 8239

251 10788 394 10737 6818 491 10632

672 10328

0 20578 10300 204 14264 341 14204

592 13720 752 133548100

010393

013848

016694

3030 30*0 3030

44» 3390

3340 5300

4080 4057 4019 3980

6000

4662

4600 4350

7060

5600 5552 5471 5391 5310 3223

84» 6860

6749

6710

6670

6603

8800 8736 8683

8337 8391

VENT TABLES

Capacity of Type B Double-Wall Vents with Single-Wail Metal Connectors

TABLE 2

Height LaienI

H L FAN

(ft)

6 0 38 77 45 59 151 85

2 39 51 36 60 96 66 85 156 104

4 NR NR 33 74 6 NR

8 0 37

2 39 5 NR NR 37 77 8 NR NR 33

10 0

2 39 61 5 52 56 39 76 111 76 105 185 122 148 277 186 190 388 261

10 NT! NR

15 0

5 10 15 NR NR NR NR

20 0 35 96 60

2 37 74 SO 56 148 99

5 50 68 47 73 140 10 NTi NR 15 NR NR NR

30 0

5 49 74 52 10

20 NR NR NR NR NR NR 181 223 30

50 0 33

2 36 84 61 53 181 121

5 48 80 NR 10 15 SR NR

30 NR NR NR NR

100 0

5 NTI NR NR 10 15 NTI NR NR

20 NTt NR 30 50

NAT FAN NAT FAN NAT FAN NAT FAN

Mix

Max Min Max

NR 31

83 56 39 59 108 75

37 87

36 93 57 56 38

,NR

NR 39

NR NR

99 63

80 56 55 164 111 76 281 183

NR NR NR

NR NR 115 131 NR

NR NR NR NR NR NR NR

NR NR 89 160 NR 118 292 186

NR NR NR

NR NR 49 214 NR

NR NR

NR N"R NR NR

NR NR

NR NR NR NR NR

50 58 164 93 83 273 1S4

102 69

57 174

53 41

59 117 80 82 193 128

34 97

47 57 44 75

NR 112 NR

100 68 190

136 93 80 225 149 128

116 79 NR 72 158

200 118 78 346 201 114 537

129 NR 80 155 208 136 216 325 210 264 469

NR NR 186

N*R

211

72 157 106

144

213 133

51 70 174

148 NR NR

NR NR NR NR

192 NR 70 351 NR 98 563 373 125 828 508

51 67

186 NR 90 342 NR 125 551

85 175

132

162 NR 138 310 NR 188

NR N-R NR 168 295 NR 224

NR NR

NR NR NR NR NR NR NR

Serving a Single Category I Appliance

Vcot i&d Coonector Diameter • D (Inches)

4" 6"

Appliance Input Rating In Thousands of Btu Per Hour

Max Min

63 102

92 89 60

64 99

111 80 325 186

86 102 216 140 144

94 86

127 76

in NR

NR 113

Max Max

249 140 126 373 204 165 522

102

152

114 147

107

122 161

132 171

128

78 100 239 158 141 363 239 125 223 146 177 344

98 122 151 239

73 73 94

145 176

231

99 163 220

176 119 121 261 179 155

114

168

107

293 165 120

112 188 261 171 237 369

201 131

124

186

248 165

192 126 254 306 196 309 372 219 no

271

173 136 417 271 171 595 168

255

157 NR 246 KR

394 230 318 205 104 495 312 133 712 308 198 131 482 305 164 696 435 204 953 602

275 174

257

NR 236 420 Ml 315

403

324

NR 153 532

264 NR 301 448

Mix Max Min Max

Min

123 231 146 225 152

123 412 151 252

175 243

444 254 287 194

119

116 499

337

115

326 308

182

220 290 192

113 375

584 334

109 429 279 139

171 397

377

208

357 228

NR NR NR 389

629

105

461 292

162

441

199

376

100 659 395 131 991

511 487

7' 8"

NAT FAN NAT FAN Max Min Max

156

159 187

148 207

234

161 580 319 206

171

193 352

163

223 158 628

153 400 272 193

283 153 713 388 195 966 523 224

148

2)7

182

203

228 438 272

306 149 772 428

248 144 528 344

178

224

222 491 316

144 849 472

257

213 570 361 265

242 255

298

361 138

203 244 646 405 299

280 267

285

NR 373

366

156 813 501

354

191 789 486

343 230

270 739 458 325 1046 639

355 685 NR 418 988 NR

540

284

320 213 201

208

313 307

203 263 409

363 246 197 482 321

235 245 470 311

342 225 280 458 300

344

241

473 314 187 631 459 298 231 616 4a 287 795

284 284 592

418

269

334 224

514

301 325

448

285

610

392 175 823 533 382 215

547

349 312

524

333

477

305

928

515 443

671

420

622

389 345

573

NR 442

555

764

473

584

Max Mh Max

695

211 237 416

202 241 518 344 299 667 443

334

1901053

182 277 666 437 339 866 570 374

1841168

360 723 461 670 426

1761292 168

253 923

1661404 1581152

1941J34 2381104 281 1075

617 866

369

423 284 251 541

277 271 327 526

777 414

844

449

531 354 242 681

497

325

413 381

568

367 573

708

468

692 457 279 896 596 3811126 734 640

419

616

400

647 229 1542 852 31219711056

806 521 777

501

750

481 461

701

971

613 209 1273 811 28016151007 401 24261509

583

894

562 363 1183 866 543 415 U50 708 5441473 906 809

502

765 20719001033

698

688

672

656

10"

NAT FAN NAT

Min Max Max Mh Max Max

Max 267 894

295 533

2581002 536

246 617 305 604 344 591

253 1093 584 3511373 718 507 2031 1057

363 643

244 1259 232 812

349 768

404 742

2381379 750

227 914

393 838

448 810

2191069 269 1049 327 1017 379 985 433 955

541 895

2201724

2571252

3131217

521 1086

1961532 2401511 921 32219451153 46029901796 2931477 342 1443 391 1410

491 1343

711 1205

371 U18 569

469

347 673 453

368

409 664 443

360 352

449 656 433

3601257 658

339 768 513 4861120 743

417

418 754 500 5981104 730

404

392 470 740 486

332 849 559

456

409 834 544

492 808 520 6881194 788

423

681 3361591 838

3191015 673

543

392 997 657

526 501

470 966 628

540 937 601

484

3261751 927 473 2631 1346

611 3091146 754

4571092 702 5261060 677

549

5921028 651

526

2961346 863

698

684 3661324 846 524 1971 1283

4401287 821

662

5071251 794 702 1884 1205

638

5701216 768

615

574

7041147 720

948 29522231189

795

3471591 991

765

4181551 963

4811512 934

736

674 1399 848 892 21591318

649

273 2479 1300

25919701168

933

902 38919051133

44718651110

884

50718251087 6902838 1696

864 824 63117471041 NR 895 1591 NR

12"

FAN Nat

5371639 849

498 979 648

584 971 638 638 962 627

521 1852 967

6651089 715

4751242 848

584 1224 825

488 2374 1237

457 1491 983

5621469 963

664 1433 928

7501399 894

443 1689 1098

547 1665 1074

64616261037

730 1587 1005

808 1550 973

454 29961545

424 1999 1308

6201927 1243

7801841 1166

937 17591101

428 3432 1818

49623961490

589 23471455

668 2299 1421

7412251 1387

395 3912 2042

371 30211817

547 2938 1763 618 2888 1730

834 27391627

1138 2547 1489

VENT TABLES

TABLE 3

Vent Connector Cepedif

Vent

Height

Connecior

(ft)

Rise

R PAN

(ft)

6 1

2 23 3

8 1

2 23 3 24

1 22 2 23 3

1 21 2 22 3

1 21 2 22 3 23

1 20 2 21 3 22

1 2 21 3

100 1 18

2 19

3 20

NAT

Min

22 24

24 50

24 55

Mu №n Mu Mu

31 37 75 55 48 121 86 60 183 124 79 253

40 27 35 72 48 44

32 36

36 37

33 36

30 33

35 35

40 36

31 33

37 34 105

42 35

33 31

39 33

66 44 34 123

19 22

36 30 133 64

73 43 32

75 48 33 82

37 28 83 44 84

Capacity of Type 6 Double-Wall Vents with Type 8 Double-Wail Connectors

Serving Two or more Category I Appliances

Vent Connector Diameter - D (Inches)

NAT PAN NAT

FAN

35 38

46 46

62 49 132 96 62 199

80 57 51 128 87

64 53 139 101

34 78

37 92 67

63 49

102 71 51

99 56 46

66 48

110 74

113

59 45

118

70 47

79 48

137

76 45

141

86 46 229 134 61 366

158

66 40 262 104 53 442 150 73 611

161

30 31

163

79 89

Appliance Input Rating Limits in Thousands of Btu Per Hour

Min

Mm Min Max

106

114

76 90

123 78 65 169

136

146 104

47 142

83 64 220 120 88

153

99 66

163 111 68 157

167

104

50 176 116 66

181

93 60 288 134

190

198 124 64

216

101 57 349 145

223

119

267

123 55

272 138 57 452 200

6”

NAT

FAN

58 164

64 66 195 67

67 69 220 ISO

62 64

104

139

176

109 129

210

145 113

134

206

235

142

248

160

246

125

259

149

271

168

299 158

178 88 423 242

309

358

172 194

447

178 75 619 242

NAT

FAN

Min Mu

77 225

Max

142 168

82 275 189

243 148

269 175

290 198 257 154 106

282

182

303 205 298 163

91 320

193

339 218 334

17]

354

202

91 371 228 113

391 182

85 408

215

NAT

FAN

Min Mu Mu Min

92 296 95 333 220 112 424 282 131 526 345 97 363

100 103 356 230 121 454

185 248

320 194

105 384 258

341

200 125

374

109 111 402

112 419 115 445

107

no 463

103 512 238 105 108

238 128 268

389 214

253 286

436 224 131 552 285 486

300

535 555 317 132 706 405

78 477 197 97 627 257 120 797

81 490

83 502

234 100 263 103 661 343

204

627

272

645 306

810

91 94

822 316

97 834

FAN

Max

109 376 114

463

118

408 248 138 507 303

123 492 330 143

436 479

131 515 134

493 273 162 609 333

137

532 323

140 565 365

134 587

265

137 618 125

649 305

129 679 360

282

123 820 126

842

266 112 1038

355

115

118

1054 1069 455

NAT

237

317

294

FAN NAT

\Cn 128 466 289

134

141 554

257 146 305 149 596

152

342

165

167 158

161

339

164

518

151 155 158 874

144

330

148 1014

392 441 151

341 135

405 139

142 1327

10"

575

612 402 542

642

658

700 68]

725 764 466

802 372 840 439

984 403

1043

1285

1306

386

358

314 372

417

394 444

347

414

494

47g 538

417 494

555

Common Vent Capacity

Vent

Height

H FAN

(ft)

6 92

FAN NAT

+FAN+NAT+NAT+FAN+NAT4NAT+FAN+NAT+NAT

65 140

FAN

Combi

FAN NAT

116

103 204

8 101 90 73 155 129 J14 224 178

10 no

79 169

15 125 112 91 195

20 136 123

152

102

138 118

50 167 153 134

100 175

163

NR 311

141

124

164 144 215 183 160 314 255 244 210 279

ISS 361

244

214

277

NR 489 421 NR 751

Common Vent Diameter - D (laches)

6- 1 rj 8- 9" 10"

ned Appliance In

FAN FAN NAT

put Rating in The

FAN FAN NAT

+FAN+NAT+NAT

243

161 147

163 339

194

178 367 299

248 200 404

309

275 223 444 348 290 602

242

283 228 206 427 352 280 556

394 459

641 547

310 360 720 585

423

421

229 475

297

266 547

353 310

658 479 1025

msands of Btu Pi

FAN FAN NAT

+FAN+NAT+NATi-FAN+NAT+NAT

314 260

477 377

444

621 499 405

706 550

854

873

!r Hour

FAN FAN

547

434 480 378 740

649 522 405 800

315 365 753 612 465

688

842

470 979

808 605 1209

1164 977

625 1408 1215 800

FAN FAN

Nat

+FAN+NAT+NAT

672

335

924 733 565

523 1035

1451 1188 860

705

1784 1502

NAT

520 410 577

465

627

495

826

640

975

740

975

VENT TABLES

TABLE 3 (cont'd)

Vent Cotmector Ctpicltj

12"

Comector

Vent

Height

H R

(ft) (ft)

6 2 174 764 496 223

8 2 186

10 2 196

15 2 214 967 568

20 2 223

100

Rise

4 6

4 6 198

6 207

6 228

4 6 237

2 216

6 2 206

4 6 221 1631 1031 290 2242 1575

2 192 1923 712 254

4 6 208

FAN

Min

180 897 616 230 1231 827 287 1617 NA NA NA NA NA NA

192

201 997 664 256

221

230

223 1316 792 294 1802 1160 231 1400 952 303 1920

213 1561

200 1984 888 263 2731

NAT

Max Max

822 952

1050 772 252

870

1095 792 263 1509 1118 325 1989 1455 395 2556 1865 494

1085 712 279 1181

1051 1162 1253

1217

1479

1064

2035

Capacity of Type B Double-Wall Vents wKh Type B Double-Wall Connectors

Serving two or more Category I Appliances

Vent Connector Diameter • D (inches)

14"

Appliance Input Rating Limits in Thousands oTBtu Per Hour

FAN

Min

516

238

644 244

536

249

272

856 286 596

291 748 298 900 307

632 286 1664 910 367 2183 1190

689 273

860

281 2139

272

NAT

Max

1046

653

1126

696 298 1478 910 365 1920 1150 NA

1307

884

1445

1072

1195 730 311 1570 1371

924

1334

790 336 1760

1499

1006 344 1978 1320 416

1632 1222 351

1443

840

1597

1064

1726 1288 373

1410

1007

2023

1291 359

2644

1050 326 1346 336 3606 1760

2811

1642 346

16" I 1«" I 20"

NAT

FAN

Max

Min

281

305 1719 U50 372 2211 313

318

357 365

376 384

350 2659 1315

369

Max

1371 853 346

lost 352 2069 1370 NA NA

1902

1390

1804

1205

1030

2157

1610

1911 1095 430 2533 1385 NA NA

2116

1395

2287

1695 450 2984 2145 567

2366

1510

2524

1830 485

2814

1685

2951

2055

3490

1370 402 4707

3714

2150 426 4968 2700 539

FAN

Min

380 2434 1770 478 3018 2180 379 2049

955

387

408 2317 1305 NA 424

438 2778 1765 554

461 474

435

447 461

414

NAT

Max

Max Min Max

1080

1772

NA NA

1460 471 2737

1205 NA

2332 1535 486 2887 1890

1665 523

2579 2796 2025 533 3470 2510 634 4216 3090

2891 1540 NA NA NA NA NA

1920

3110

2340 632 4080 2875 741

3299

1665

3548

2135 580

3730

2605 594

3893

1740

2220 523

4842

FAN

NA NA

619 3840

NA NA NA NA NA NA NA NA

NA NA NA NA NA NA

NAT

Max

NA NA NA NA

1800

NA NA NA NA

2290

3169

3197

2060

2180

3447

2650 671 4511 3190

3708

2365

2633

4601

3208 724 5826

4808

5982 2750 639

3350 654 7453

6143

FAN

Max

Min

NA NA NA NA NA

NA NA

560 3319 2180 662

3665

568

3502

581 589 3849 2760

624

3881 2490

4190

661

4681

728

4976

709 5569 3185

7254

22"

NAT

Max Min

NA NA

2640 669 4373 3130

2280

2630

2860

3480

3885

3330 769 8650 4070 786 8892 4810

NA NA

FAN

NA NA NA NA NA

NA NA NA

686

694

NA NA

734

743

772 785

NA NA 847 860

851 867

24"

NAT

Max

NA NA

3957

2590

2710

4175

3270

4593

NA 4631 2960 5035 3600

5005 3130

5392

3790

5606 3410 5961 4150

NA 6633 3790 6943

4620

3950

Common Vent Capadtf

12"

Vent

Height

FAN

FAN NAT FAN FAN NAT fan FAN NAT

+FAN +NAT +NAT +FAN+NAT +NAT +FAN +NAT +NAT +FAN +NAT +NAT

(ft)

6 900

8 10 15 1247 20 1405 1116 916 2006

30 1658 1327 1025 2373 50 2024

100 2569 2131

696 588

994

773 652 1423

1076 841 712 1542 1200 995 2093 1625 1300

825 1794

986

1640 1280 2911 2347 1863 3964 3183 2430

1670

Common Vent Diameter - D (inches)

14"

1284

990 815 1735 1336 1065 2253 1732

1103 912

1410 1588

1892

3732 3076

L _

___

Combined Appliance Input Rating in Thousands of Btu Per Hour

1158 1290 2722

1525

2450

16"

1927

1491 1190

2440 1910 1510

2147

1690 3561 2798

2558 1990

3220

5125 4202 3200 6749 5509 4050

18"

FAN

NAT

1345

2507

1936 1510 3162

2727

2113 1645

3184

2484 1910 4026 3133 2360

2140

4197

3326 2520

5184

4149 3075

20"

FAN FAN NAT FAN FAN

+FAN +NAT +NAT+FAN +NAT +NAT

2838 2180 1660 3488

1860 3890 2998 2200

2439

3444

2665 2030 4241 3278 2400

4548 5303 6567 8597

2640

3552

3110

4193

3800

5240 6986 5000 10681 8648

22"

NAT

2677

1970

3862 2790 6016 4670 3400

4971

4352 3120

5573

5157 3680

6539

6458

8116

4500 9837 5920 13004 10499

FAN FAN

+FAN

+NAT +NAT

3226

4206

3616 2680

4695

3957 2920

5123

5261 3800

6749

6247

7940

7813

24"

NAT

2390

4480 5475 7200

VENT TABLES

TABLE 4

Vent Connector Capicity

Connector

Vent

Height

H R

(ft) (ft)

Rise

1 NR 2 NR

3 1 NR NTi

2 NR NR

1 47 60 31 77 no 57

2 50 62 37 81 115 3 54

Min

46 69 33 75 49 53

Mu N£n

26 NR NR 46

31 NR

NR 34

29 79 34

42 85 119 76

45 83

NAT

FAN

Capacity of Type B Double-Wall Vent with Single-Wall Connectors

Serving Two or more Category I Alliances

Vent Connector Diameter - D (Inches)

Appliance Input Rating Limits in Thousands oT Btu Per Hour

FAN NAT FAN NAT

55 NR NR 85

«3

87 100

62 121 131

87 52 116 138 81 177 214 94

62 121 150 97 70

128 60 132

136

82 119

Mu Mu Mu Mu Min

ACn

NR 71

127 160

175

113 117 185

193

122

207

109 114 215

221 128

I 6" I r I

NAT

FAN

NR NR 102 207 223 140 262

182 123

168 174 198 138 222

116 238 291 158 312

230 138

185

109 193

89 106 177 290 152 236 120 185 300 172 244 412

96 162 113

243 157 278 129 226

169

336 137 217 460 188 284 170 345 164 226 473 223 294 623 293 376 178 353 186 235

FAN

251

215

273 188

314

246

333 215 331

255

380 175 296

397

486

NAT

Mu Min

167 271

279

321

189

307

208

235 316 542 309 400 690

304 640 331

252

r 10"

NAT

FAN

Mu Mn

293 183 325 373 234 447 331 219 361

380 208 397 482 266 556 411 438 281

497 521

604 245 364 768 314 507

Mki Mu Mu

334

247

344 462 316 468

407 522

248

418

230 378

274

389

387

NAT

FAN

422 281 458

317

557 360 630 294

662 349

394

793

375 520 983 458

816 424 535 1013 518

NAT

FAN

Min Mu

568 579

528 779 358 541 555

463 286

344

524 574

385

596 324 646 387 690

437

819 425 855

482 384

951

Common Vent Capacity

Vent

H FAN FAN NAT FAN

+FAN+NAT+NAT*FAN+NAT+NAT+FAN+NAT+NAT+-FAN+NAT+NAT

(ft)

8 98 10 15 121 20 30 50

78 64 136 113 100

87 71 94

106

108 88 118 98 208

131

132 113 236 202 179 350

145

145 128 268 233 204 406

159

Common Vent Diameter • D (inches)

Combined Appliance Input Rating In Thousands of Btu Per Hour

FAN

NAT FAN FAN

126

151

163 189

112 218 173

137

120 237 189 174 357 292 236 159 140 177

155 305

200

275

158 144 304

221 200 247 286 257 337

6" 7"

NAT FAN

159 331

223 463 383 302

296

FAN NAT FAN

244 269 218 436

343 274 544

416

446

533

529 410 833

622

FAN

+FAN+NAT+NATfFAN+NAT+NAT+FAN+NAT+NAT

398

196

467

606 703

349

NAT FAN

310 257 541 429 342 285 592

369 309 434 357 738 599 456 905 487

395

570

459

686 535

FAN NAT FAN FAN NAT

332

473

373 730

638 512 398

824 673 958

1139

790 954

512 1013 593 1183 689 1418

ID"

407

515

665

569 460

787 617 487

718

553 808 626 952 723

1157 838

VENT TABLES

TABLE 5

Height

Lateral

(ft)

6 2 NR NR

15 2 NR NR

50 2 NR

Minbnuin Intemal Aiea of Chimney Square Inches

Maximum Internal Area of Chimney Square Inches

(ft)

5 NR 2 NR NR:

5 NR

10 NR NR

5 NR 10 NR NR 15 NR NR;

5 10 NR NR 15 NR 20

2 NR NR

5 NR NR

10 NR 15 NR NR:

20 NR

30 NR

5 NR NR

10 NR NR

15 NR 20 NR NR

30 NR NR

FAN

Min Max

NR NR

Capacity of Masonry Chimney with Type B Doubld'WaU Vent Connectors

3“

NAT :

Max

NR;

25* NR NR; NR NR ;;82 NR NR

; n*

NR^

3«* NR NR 74 NR NR 124 NR NR

NR NR

,NR

nr; NR NR

12 19

FAN ^

Min Max

NR NR

NR NR" NR NR NR NR NR NR NR NR NR NR

NR NR^ NR NR NR NR NR NR NR NR;

NR NR 08* NR NR U6 NR NR NR

NR INR NR NR

NR;

NR NR NR NR 70*

NR: «7*

NR NR NR NR NR NR

NR NR NR NR

NR NR NR NR NR NR NR

88 137

KAT

Max

tn'

60*

NK NR NR 83* NR

; i82*

NR NR NR NR NR NR NR

im-

S'*

NAT ■

FAN

Max

Min

NR NR

NR NR NR NR 107 NR NR

NR NR 89* NR NR

NR NR

NR NR 128* NR NR

NR NR

NR NR NR

NR NR 127* NR NR NR NR

Max

NR: ;103

■iu

NR 137 NR NR;

NR 115* NR 107* NR

NR 138* NR NR

Serving a Single Category I Appliance

To be used wltii chimney areas wtOiln the dze limits at bottom

Appliance

FAN

Min Max Mhi Max

87 NR

107*

97*

: 91*

NR l6l *

I5l*

NR NR

NR NR NR NR NR NR

NR '.148* NR NR

NR 184* NR NR NR 171* NR

NR NR NR

NR 199* NR NR^ 282* NR NR: NR NR NR NR

Connector INameter • D (inches)

1 1 7" 1 8" 1

Input)

Uling in Ttai

na¥

Max

130

117:

;I62 NR

148 NR

;;139

m 164 NR

153

141 NR

201 NR

184

159

216 NR

19« NR

159*

251*

230* 215*

185*

;:iNR

38 50 63 78

198 269 352 445

FAN

NR NR

NR NR 254

NR NR

NR NR NR NR NR

NR NR ::264*

NR NR

>usand

NAT

Met-:.

180

\22l-- NR nr;

204

iM--

231

216 NR NR 296 NR NR

201 NR NR 281 NR 274 NR

237

soTBtn Per

Mia Max

NR NR

NR NR NR NR NR

NR NR NR NR

NR NR NR NR;

NR NR NR NR

Hour

FAN .

NAT FAN ;

Min Max Min

nr: 231 NR nr;

NR 277 NR NR

NR 314

247

298

313

375 350 332

NR NR

NR NR NR NR NR NR NR

m NR NR ;421 NR NR

NR NR

28) NR

263

243* NR NR;

NR nr;

227*

188*

'351* ;,323*

NR NRi NR NR NR NR NR NR

;304*

NR NR NR NR

I0t

NRi;

::353

r'332^-

NR;

:ms

NR NR

373

NR NR NR NR NR NR

NR nr;

445 NR NR

NR NR

400* 376* NR NR

327*

Nat

hbx

'320 '■

298

388 365 NR 347 NR NR 444

'441'

416 394 NR NR

NR 375 NR NR

491

463 440

418 397

FAN 14AT

Max Min Max

NR NR NR

NR NR

NR NR NR

NR NR NR NR NR NR

\5S$ NR

NR NR

;iS67

326 500 ;476 NR

NR NR NR NR

NR NR NR

NR NR NR NR NR

5^* NR NR

NR NR;

5tl*

468*

10"

404

376 NR NR 561

!491 NR

466 NR

NR NR NR

562

NR NR

;5i3 NR

NR 717

NR NR

550

NR NR

533 567 NR NR 485 NR

627 597

NR NR NR

566

541 i NR NR

NR NR

683 NR NR

648 621 NR NR 592 NR 5» NR NR

NR NR

812

774 NR

733 NR NR 702 NR 669*

NR NR NR

623*

12"

FAN .NAT.;:;

Max

5» '

NR " 734 NR

668

828

'"M:;

742

NR 953

993

Wk'

109«

Ws^

132

792

VENT TABLES

TABLE 6

Hei^t Lateral

(ft)

6 2 NR

10 2 NR NR

15 2 NR

20 2 NR NR NR NR

oi ro

30 2

50 2 NR NR

Minimum Internal Area of Chimney Square Inches

Maximum Internal Area of Chinmey Square Inches

(ft)

5 NR

5 10 15

20 30

5 10 15

20 NR NR 30

FAN

Min

NR NR NR NR 24* NR NR

NR NR NR NR 27* NR NR NR NR NR NR 46* NR NR NR NR

NR NR 35* NR NR 6)* NR NR NR NR NR NR NR NR

NR NR NR NR NR NR HR NR NR 66* NR NR NR NR NR NR

NR NR NR

NR NR NR NR NR HR NR NR NR

NR NR NR

Nat

Max

NR 28 NR NR NR NR NR 48 NR NR

NR 35* NR NR 67 NR NR

: HR

. NR :■

PAN

Min

Max M«

NR NR

28*

NR NR

32*

NR NR

NR NR HR NR NR

NR NR

41* NR NR

NR NR

NR NR NR NR

NR NR NR NR NR NR

NR NR

NÄ

NR NR NR

NAt

: 52

::HR-

-HR HR

•:91*

m m

Capacity of Masonry Chimney with Single-Wall Vent Connectors

Sen/ing a Single Category I Appliance

To be used wf№ chimney areas within the size limits at bottom

AppUancc Input Rating in Thousands of Btu Per Hour

HAT ^

FAN

Min Max

NR NR

49*

NR NR

54*

59*

NR NR 105* NR NR

NR NR NR NR

NR NR: 136

81* 7$*

NR NR

NR NR 105* NR NR 168* NR NR 240* NR NR NR NR

:Ma»'

86 81

iÖ2. NR

U3 ,

106 NR

NR :-96;

115;

93*

127*

113*

«8* NR NR 155* NR NR

NR NR NR NR NR NR NR NR NR

160*

NR 149* NR NR 228* NR NR

136*

124* NR

NR NR

28 38

137 198

FAN

Min Max:

NR NR 130 NR NR NR NR|

NR NR, NR NR 178 ^ NR NR

NR NR 151 NR NR 214 NR NR 294 NR

NR NR NR 183 NR NR

NR NR 156 NR NR 217 NR NR

NR NR NR NR NR NR 182* NR NR

NR NR NR NR

NR NR NR NR NR 180* NR NR

Connector EHameter - D (Inches)

NAT

Max

NR 161 NR

NR 163

Min Max

116 NR NR

NR NR NR

147 137 NR

NR NR

138 ^

NR NR

200

170

144*

NR NR

215

NR NR 302 NR NR

NR NR

196

NR NR

250*

212* NR

195* NR

r 8"

NAT

FAN

Max

180 164 NR NR

220 NR NR 203

189 249

230 NR NR 312 NR NR 414 NR NR 531

198 273

252

235 NR NR 330 NR NR 437 NR NR 562 NR NR 875

202

279 260 NR NR '370 NR NR 496 NR NR 644 ■ NR NR t020

223* 182* NR NR

350* NR NR 475 NR NR

321*

NR 301* NR NR 420* NR

278* 258*1

NR NR NR NR 318* NR NR 458* NR

50 63

269

HAT

FAN i

Min Max

NR NR 247 NR NR

NR NR 276

NR NR NR NR 335 NR NR

NR NR NR

NR NR

NR NR 327 NR NR

NR NR 442 NR NR

NR NR NR NR

Max

230 297

261

348

3U 292

420 391

349 NR

281 * NR NR

395*

370*

352

FAN

Min Max

NR NR 297 NR NR 375 NR NR 387 NR NR

NR NR NR NR

NR NR 556 NR NR 715 .■ NR NR DtO NR NR

NR NR NR NR

445 550 792

HAT

Max

319

364

345 NR NR 440

NR 392 NR NR

372

^-490

: 461

414 392

524 NR NR

471 NR NR 443 NR NR 585 NR 408 NR NR S44 NR

631 593 NR NR 770

562 NR 533* 504*

78 95 132

10" 12"

NAT

FAN

Min Max

NR NR 400 NR NR 580

NR NR

NR NR 560 NR NR

NR NR NR NR

NR NR 594

NR NR NR NR

NR NR 810 NR NR 1240

NR NR NR NR 660* NR

Max Min Max Mux

490

465 441

504 NR NR

481

62$

536 NR

510

680

625

728 NR NR 1140

695

610*

FAN

NR NR NR

NR NR NR NR

NR NR

NR NR NR NR

NR NR

HAT

NR 560

722

710

665 840

823

: 774

738 950

930

NR 835

800

NR 2090

975

932

865

NR 1220

NR 1090 NR

1040

NR 970

* SEE NOTE 27

VENT TABLES

TABLE 7

Vent CcamcctM' C«p*dty

Cotmectnr

Vcm

Height

(ft)

Rile

(ft)

1 2 3 27

1 24 4S 2 25 55

3 26

1 24 54;: 2 25

3 26 64

1 2

3 26 64

Common Vent Capedty

Capacity of Masonry Chimney with Type B Double*Wall Connectors

FAN FAN MU'

Mia Mu Hnt:.:

24 NR 26

23 52 24

Mia

39 62 40 52

42 92 ; 38 93

39 105 ;

■.■35-'i 37 111 48 52 192

38 40

36';,

;

39 135 66

Serving two or more Category I Appliances

Vent ronnertor PlametM' • D Qndwi)

I 6" I 7" I

AppUence btput Piling Limit* In ThaiMiKU oTBbi Ber Hour

NAT FAN

Mu;

115

122 131

116^ 127

79;:

Man

"-n-:

«I

5«

«6

FAN

hCa Mu

53 133 55 155

54 56 174 57 189

54 56

51 53 225

55 237

Mu Mia

106

85 97

154

»9

«a

82 69 357

95 72 376

208

107 74

221 209

96 70 421

108 72 435 170 98

194

65 67

230

69 262

72 277

299

76 319

392 163 : 101

405

Nat..

UmO;

lot

124

143 91

lU. 134

153 127

14ÍS 99

133

152

FAN NAT FAN KaT;:

274 324 107

369; 20S 109 491 384^

100

419

103

lOS

448: 131 597

504 531 554

582:

604

624 247

Ato

141

■mi

: l8T:í

:mi

198

■■■m

№a

104

37o!

436

125 511 128 558:

119

680. ^5:' 122 715 125

746

115

798 118 827 121 854

PAN

Min

;é#|

20t

■mC.

270:

317

334

Mu Min Mu

124

479

127 562;

633: 3*9 151 795

129

658

153 156 718^ 187 900

760

159

883

145

928: ;378

149

968

152

1049^

140

1085:

143 147 1118 176 1421

FAN

253 145 599

148

330

184 824

297

190 960

::'S82'

175

:337

179 182 1220

418

168

172 1379

■;4i»'

Iff*

694

1115 1171

1334

NAt

319 378 439

375 *32

486

432 *84

535

462

510 558

Vent

Height

(ft)

10 15 20

30 NR NR NR 50 NR NR NR'.'

FAN FAN KÁT

+FAN+NATrt4AT

NR 74,,.:2S::' NR 80-;-l-!-;:^'::: NR 130 33,

NR 84 31

NR 90 ■ '36

NR 92 41

Mlnlmim Intcmal Am oT CblmMy, Square Incbce

Com

Uned Appliance Ii

FAN FAN NAT

-^AN+NAT:^T ;

NR 119 46 NR I78.>71

NR 138 36

NR 152: : 1ST;'

NR 159 75 NR NR NR NR NR im NR NR NR

FAN FAN NAT

+FAN+NAT4«AT'

NR 193 32 NR 207 90

NR 233 106 NR 250 122 NR 270 137

12 1 19 1 28 1 38 1 50 1 63 1 78 1 113

■put RaUng in Tha

FAN FAN NAT

+FAN+NATe4AT

NR 257 K»

NR 279 119

NR 299 131

NR 334 152

NR 368 m

NR 404 198 NR 564-^3^.-:

NR NR NR;

iwandi oTBtu Per

FAN FAN NAT

♦FAN+NAT-rtíAT

NR 351 t<3 NR 384 163

NR 409 177 : NR 538 p6 NR 686 302 NR 1010 454

NR in NR 611 2*3 . :

NR 508 2*3

NR 620 328

flour

FAN FAN NAT

+FAN+NAT+NAT

NR 458:.;;^ttt;^; NR 501 "2WJ

NR 668 325

NR 747 381:

NR 831 461 NR 1089 606

FAN FAN NAT

^AN-^NAT4NAT

NR 582. 246 NR 853 NR

NR 636 2»

NR 781 3& NR 858 419 NR 1286 648 NR 969 496

FAN FAN NAT

+FAN+NAT4NAT

NR 937 408

NR 1136 3*6

NR 1473 749

NR 1692 922

VENT TABLES

TABLE 8

VcDl Cccoecutr

Vent Connector

H R PAN

(ft)

6 1

15 1

30 I NR

Riic

(ft)

2 NR NR NR NR; NR NR" 3

3 NR NR

2 NR NR 91 119

3 NR NR 1 NR NR 85 113 48

2 NR NR

Commoii Vent C^dtj

Capacity of Masonry Chimney with Single-Wall Connectors

NAT

Mu bfitt №n Mu.;

Min

NR NR NR:-

NR ■

■■S4,

NR NR NR NR

30 34 96

PAN JMt PAN NAT'' FAN NAt

m,-

NR NR-^ NR NR

103 135 170: 207

112

NR 86 108

■,:Sr-

127

123

NR NR- 3S 94 131 65

Serving two or more Category I Appliances

Vent Conneclar IXunct«' - D №cbM)

Anplbiicc Input Rating lináU Id TIuniMfid* of Bbt Per Hour

Min

6Í ■]

134 129 151

^4S'

141 185:

«3 47 126

132 138 216

124 204

130 136 23V

Mu Mu Min Mu-

NR 179 191 100 231 271 140 292 366 200 362

■:■■R4■;186 227

153

"■■97::

■:>73'

toi

187

«0

203

iOS

218 94 196

106

258

193 199 271

295

215

315

193 347 324: 259 492 183 338 665 250 430 201 366 209

381

188

392 408 149 262

205

422

L _

123

■urn

112 132

151

142

160 130

167

Min

Mu.:

239 321:

247

365

268 376-'

277 411

286 439

518

269 277 540

567

252

588

271 607

172:

30®--:

PAN

KQn

301 309 491

NAT

171 349

359 548

189

368 586

213

348 699

20Í

358

2»:

328 778

194

218 339 243 349 831

Sái . FAN NAT

Mu Min

432

502

729

806

373

381

225 445

456

250

466 755 37«

389

442

312 452

417

298- 429 1058:

440 1090 43l 610 1386

328

Mtt

474

252

557

399

634

3^ '

646

291

706:

33*

864 330 600

908

372

946

412

1022

355 393

10"

PAN

Min Mu

499 594 509 696 519 793

623 808 634

884

646

94S 437

1089 455

613

1145 490

626

1193

582 1302 596

1346

NAT

283 331

375 360

402

521 537

567 595

Vent

H FAN FAN NAT

+FAN+NAT«lAr;

(ft)

6 NR

10 NR 15 NR

20 30 NR

so NR

NR NR NR NR NR NR NR NR NR NR NR NR NR NK NR 612 325 j

73 35 79 38 83 88 36 90 40

Minlnaitn intertul Area of Chimney, Square inebe«

19 28

CombtuMi Appliance Input Rating in Thousandi of Btu Per Hour

FAN

FAN NAlT FAN FAN NAT FAN FAN NAT

+FAN-»-NAT«MAT +FAN+NAT*NAT

NR 118 45 NR

128 52

136 56 NR 205 89

149 66 157 74

NR NR

176 71 NR

NR 190 81 NR

NR 230 1« NR 335 NR

247 120 NR

NR NR 266 135

♦FAN-rflATMÍAT

255 103 276 JM

295 t» NR

362 170

398 195

50 63 78 113

FAN

FAN NAT

4^FAN4NAT^T

348 142

380

405 175 : 460 3¿

503 240 : NR 661

558 ¿5

KAN FAN NAT FAN FAN NAT

4FAN+NAT4NA7 4FAN+NAT4KAT

NR 455 187:

497 317. NR 532 234 NR 602 »0

739 377

NR NR 821 456

NR 579 245 NR 846 NR

633 277 NR 680 300 NR lOOO 450 NR 772 360 NR

849 415 NR

957 490 NR 1076 600 NR 1672

FAN FAN

+FAN+NAT+NAT

NR 928

NR 1139 NR 1264 640 NR 1447 740

NAT

"nr

405

540

910

TABLE 9

MASONRY CHIMNEY UNER DIMENSIONS

WITH CIRCULAR EQUIVALENTS

NOMINAL INSIDE UNER SIZE DIMENSIONS IN

INCHES

UNER INCHES

INSIDE DIA.

OR EQUIVALENT

DIA INCHES

EQUIVALENT AREA SO. INCHES

4x8

8x8

8x 12

12x 12 12x 16 9 1/2 X 13" \/2 11.8

16x 16 13 1/4 X 13 1/4 14.5

16x20 20x20 20x24 24x24 24x28

28x28 30x30 30x36

36x36 31 1/2x31 1\2 34.4

When liner sizes differ dimensionally from those sfK^wn in Table 9 equivalent diameters may be determined from published tables for square and rectangular

ducts of equivalent carrying capacity or by other engineering methods.

21/2x61/2

6 3/4x6 3/4

6 1\2x 10 1/2

9 3/4x9 3/4 10.4

13x 17 16 3/4 X 16 3/4 16 1/2x20 1/2

20 1/4 x 20 1/4

20 1/2x241/4

241/4 x 24 1/4 25 1/2x25 1/2 25 1/2 X 31 1/2

4 5 6 7

7.4 8

10 11 12

16.2 18

18.2

20.1 22

22.1 24

24.1

26.4 27

27.9 30

30.9 33

12.2

19.6

28.3

38.3

42.7

50.3

63.6

78.5

83.3 95

107.5 113

153.9

162.9

176.7

206.1

254.4

260.2

314.1

314.2

380.1

452.3

456.2

543.3

572.5 607

706.8

749.9

855.3

929.4

1017.9

EXAMPLES USING SINGLE

APPLIANCE VENTING TABLES

Example 1; Single Draft-Hood-Equipped Appliance Suppose that an installer has a 120,000 8tu/hr input

apptiafx:e with a 5 inch diameter draft hood outlet that needs to be vented into a 10 foot high Type В vent system. What size vent should be used assuming (a) a 5Ft lateral single-wall metal vent connector is used with two 90° elbows, (b) a 5-Ft lateral single-wall metal vent connector is used with three 90° elbows in the vent system?

Solution Table 2 should be used to solve this problem because

single-wall metal vent connectors are being used with a Type В vent: Refer to Figure 4 of Typical Applications.

(a) Read down the first column in Table 2 until the row

associated with a 10-Ft height and 5-Ft lateral is found. Read across this row until a vent capacity greater than 120,000 Btu/hr is located in the

shaded columns labeled "NAT Max" tor dratt-hoodequipped appliances. In this case, a 5 inch diameter vent has a capacity of 122,000 Btu/hr and may be used for this ai^lication.

(b) If three 90° elbows are used in the vent system,

then the maximum vent capacity listed in the tables rTMJst be reduced by 10 percent (see Note 3). This implies that the 5 inch diameter vent has an adjusted capacity of only 110,000 Btu/hr. in this case, the vent system must be increased to 6 inches in diameter. See calcutations below:

122,000 X .90 * 110,000 for 5" Vent From Table 2 - Select 6" Vent

186,000 X .90 =! 167,000; This is greater than the required 120,000, therefore use a 6" Vent and

connector when three elbows are used.

Example 2: Single Fan-Assisted Appliance Suppose an installer has an 80,000 Btu/hr input fan-

assisted ai:^liance that must be installed using 10 feet of

lateral connector attached to a 30-Ft high Type В vent. Two 90° elbows are needed for the installation. Can a single-wall metal vent connector be used for this application?

Solution Table 2 refers to the use of single-wall metal vent

connectors with Type 8 vent. In the first column find the row associated with a 30-Ft height and a 10-Ft lateral.

Read across this row, looking at the "FAN Min" and "FAN

Max" columns, to find that a 3 inch diameter single-wall metal connector vent is not recommended. Moving to the next larger size sii^le wall connector (4") we find that a 4 inch diameter single-wall metal connector has a recommended minimum vent capacity of 91,000 Btu/hr and a recommended maximum vent capacity of 144,000 Btu/hr. The 80,000 Btu/hr fan-assisted appliance is outside this range, so we conclude that a single-wall metal vent connector cannot be used to vent this appliance using 10 feet of lateral for the connector.

However, we see that if the 80,000 Btu/hr input

appliance could be moved to within 5 feet of the vertical vent, then a 4 inch single-wall metal connector could be used to vent the appliance. Table 2 shows the acceptable range of vent capacities for a 4 inch vent with 5 feet of lateral to be between 72,000 Btu/hr and

157.000 Btu/hr.

If the appliance cannot be moved closer to the vertical vent, then Type В vent could be used as the connector

material. In this case .Table 1 shows that (or a 30-Ft high vent with 10 feet of lateral, the acceptable range of vent capacities for a 4 inch diameter vent attached to a fan-

assisted appliance are between 37,000 Btu/hr and

150.000 Btu/hr.

EXAMPLE 2

10’ Lateral ■

Fan Assisted Appriance 00,000 BTUH Input

EXAMPLES USING COMMON

VENTING TABLES

Example 3: Common Venting Two Draft-Hood

Appliances

Suppose a 35,000 Btu/hr water heater is to be сотгтюп vented with a 150,000 Btu/hr furnace using a common

vent with a total height of 30 feet. The connector rise is 2

feet for the water heater and 3 feet for the furnace. Assume single-wall metal connectors will be used with Type В vent. What size connectors and combined vent should be used in this installation?

Solution - (Table 4 applies in this example) Table 4 should be used to size single-wall metal vent

connectors attached to Type В vertical vert. In the vent connector capacity Table 4, find the row associated with

a 30-Ft vent height. For a 2-Ft rise on the vent connector

for the water heater, read the shaded columns for draft-

hood-equipped appliances to find that a 3 inch diameter

vent connector has a capacity o1 37,000 Btu/hr. Therefore, a 3 inch single-wall metal vent connector may

be used with the water heater. For a draft-hood-

equipped furnace with a 3-Ft rise, read across the appropriate row to find that a 5 inch diameter vent

connector has a maximum capacity of 120.000 Btu/hr

(which is too small for the furnace) and a 6 inch diameter

vent connector has a maximum vert capacity of 172,000

Btu/hr. Therefore, a 6 inch diameter vent connector should be used with the 150,000 Btu/hr furnace.

For the capacity of the combined vent, the lower portion of Table 4 should be used. The combined vert capacity required is 185,000 Btu/hr. Table 4 shows that the combined vent capacity of a 6 inch diameter vent with a 30-Ft vent height is 257,000 Btu/hr. This is more than adequate to handle the 35,000 Btu/hr input water heater and the 150,000 Btu/hr input furnace.

Example 4; Common Verting a Draft Hood Water

Heater with a Fan-Assisted Furnace

In this case, a 35,000 Btu/hr input draft-hood-equipped water heater with a 2 loot connector rise is to be common vented with a 100,000 Btu/hr fan-assisted furnace with a 3-Ft connector rise. The common vent consists of a 30-

Ft rise of Type В vert. What are the recommended vent diameters for each connector and the common vent?

Solution - (Table 4) Water Heater vent Connector Diameter. Let us

assume the installer would like to use a single-wall metal

vent connector. Using Table 4, Vent Connector Capacity, read down the Total Vert Height "H" column to 30 feet and read across the 2-Ft Connector Rise "R" row to the first Btu/hr rating in the "NAT Max" column that is equal to or greater than the water heater Input rating. The table shows that a 3 inch vent connector has a maximum input rating of 37,000 Btu/hr. Since this is greater than the water heater input rating, a 3 inch vent connector is adequate. Furthermore, since the water heater is equipped with a draft hood, there are no minimum input rating restrictions.

Furnace Vent Connector Diameter. Again, let us

assume the installer would like to use a single-wall metal vent connector. Using Table 4, Vent Connector Capacity, read down the Total Vent Height "H" column to 30 feet and across the 3-ft Connector Rise "R" row. Since the furnace has a fan-assisted combustion system, find the first "FAN Max" column with a Btu/hr rating greater than the furnace input rating. The 4 inch vent connector has a maximum input rating of 119,000 Btu/hr and a minimum input rating of 85,000 Btu/hr. The 100,000 Btu/hr furnace in this example falls within this range, so a 4 inch connector is adequate. If the furnace would have had an input rating of 80,000 Btu/hr, than a

Example 4; (cont'd)

EXAMPLES USING COMMON

VENTING TABLES

Common Vent Diameter. The total input to the

common vent is 135,000 Btu/hr. Using Table 4, Common Vent Capacity, read down the Total Vent

Height "H** column to 30 feet and across this row to find the smallest vent diameter in the "FAN+NAT column that has a Btu/hr rating equal to or greater thani 35,000

Btu/hr. The 4 inch common vent has a capacity of

132,000 Btu/hr and the 5 inch common vent has a

capacity of 202,000 Btu/hr. Therefore, the 5 inch common vent should be used in this example.

Summary. In this example, the installer may use a 3

inch diameter, single-wall metal vent connector for the water heater and a 4 inch diameter, single-wall metal vent connector for the furnace. The common vent should be a 5 inch diameter Type 8 vent.

Example 5: Single Draft Hood Equipped Furnace

Vented into A Masonry Chimney

A 135,000 Btu/hr draft hood equipped furnace is to be vented into a 15' high tile lined masonry chimney. The chimney is not exposed to the outside except above the

roof line. The furnace has a 6" diameter draft hood outlet

and requires a 10* lateral vent connector with 3 elbows. The chimney is constructed using a 8" x 8*‘ liner. What size single wall vent connector is required?

Solution: Table 6 should be used. Refer to the figure for Example

To determine the required vent connector diameter,

read down the height column in Table 6 until 15' is found. Find the row for a 10' long lateral. The table shows that a 6" diameter connector will allow a maximum capacity of 151,000 Btu/hr for "Nat Max." (draft-hood

equipped) furnace. Because 3 elbows are required,

however, the maximum capacity must be reduced by

10% (See Note 3). Allowing for the additional elbow the corrected maximum capacity is 135,900 Btu/hr. A 6"

diameter connector is large enough and should be

used. The internal area of the chimney is 8" x 8" = 64 sq. in. and is within the acceptable range (38 sq. in to 198 sq. in.) for a 6" vent connector as shown in Table 6.

Example 6: Common venting into a Masonry Chimney

In this case, a 35,000 Btu/hr input 4 inch diameter outlet draft hood-equipped water heater with 2 feet of connector rise and 4 feet of horizontal length is to be common vented with a 100,000 Btu/hr fan-assisted furnace with a 4 inch diameter flue collar, 3 feet of

connector rise and 6 feet of horizontal length. The common vent is an 8 x 12 tile lined chimeny that is 30 feet tall. What are the recommended vent diameters for

each connector? Is this an acceptable installation?

Solution

Table 8 is used to size common venting installations

involving single wall connectors into masonry chimneys.

Water Heater Vent Connector Diameter. Using

Table 8, Vent Connector Capacity, read down the Total

Vent Height "H" column to 30 feet and read across the 2 ft Connector Rise "R" row to the first Btu/hr rating in the

"NAT MAX" column tehat is equal to or greater than the water heater input rating. The Table shows that a 3 inch

vent connector has a maximum input of only 31,000

Btu/hr while a 4 inch vent connector has a maximum

input of 57,000 Btu/hr. A 4 inch vent connector must therefore be used.

Furnace Vent Connector Diameter. Using Table 8

Vent Connector Capacity, read down the Total Vent

Height "H" column to 30 feet and across the 3 ft

Connector Rise "R" row. Since the furnace has a fan-

assisted combustion system, find the first "FAN MAX"

column with a Btu/hr rating greater than the furnace input

rating. The 4 inch vent connector has a maximum input

rating of 127,000 Btu/hr and a minimum input rating of

95,000 Btu/hr. The 100,000 Btu/hr furnace in this

example falls within this range, so a 4 inch connector is

adequate.

EXAMPLE 6: (cont'd)

Example 7: Interpolating Between Table Values

Masonry Chimney. From Table 9, the Equivalent Area for a Nominal Liner size of 8 irxihes x 12 inches is

63.6 square inches. Using Table 8, Common Vent Capacity, read down the "Fan + Nat" column under the Minimum internal Area of Chimney value of 63 to the row

for 30'ft height, to find a capacity value of 739,000

Btu/hr. The combined input rating of the furnace and water heater 135,000 Btuh/hr, is less than the Table value, so this is an acceptable installation.

Note 19 requires the common verrt area to be no greater

than seven times the flow area of the smallest appliance

outlet area. Both appliances in this installation use 4 inch diameter outlets. From Table 9, the Equivalent Area for

an Inside Diameter of 4 inches is 12.2 square inches.

Seven times 12.2 is 85.4, which is greater than 63.6, so this configuration is acceptable.

Note 1 specifies that the Table values are for vents or chimneys which are not exposed to the outdoors below the roofline. If the masonry chimney in this case were

exposed below the roofline, then the appliance

manufacturer, local gas utility, and/or authority having jurisdiction must be consulted.

An installer has an 80,000 Btu/hr input appliance with a 4 inch diameter draft hood outlet that needs to be vented into a 12-ft high Type В vent. The vent connector has a 5

ft lateral length and is also Type B. Can this appliance be

vented using a 4 inch diameter vent? Solution

Table 1 is used in the case of an all Type В vent system.

However, since there is no entry in Table 1 for height of 12 feel, interpolation must be used. Head down the 4

inch diameter "NAT Max" column to the row associated with 10 ft. height and 5 ft. laterial to find the capacity value of 77,000 Btu/hr. Go down further to the 15 ft. height, 5 ft. lateral row to find the capacity value of

87.000 Btu/hr. The difference between the 15 ft. height capacity value and the 10 ft. height capacity value is

10.000 Btu/hr. The capacity for a vent system with a 12 ft. height is equal to the capacity for a 10 ft. height plus 2/5 of the difference between the 10 ft. and 15 ft. height values, or 77,000 + 2/5 x 10,000 = 81,000 Btu/hr. Therefore, a 4 inch diameter vent may be used in the installation.

Multi-Story Gas Vent Design Procedure

for Each Segment of System

Figure 13

Vent Connector Size Depends On:

• Input

• Rise

• Available Total Height “H”

• Table 3 Connectors

Common Vent Size Depends On:

• Combined Inputs

• Available Total Heght

• Table 3 Common Vent

• Vertical Common Vent With No Offsets

Mufti-Story Vent Systems

Use Individual Vent for Top Floor Appliance if Connector Requirement for Rise or Total Height Cannot be Met

Use Vent Connector

Table

Top Floor Appliance

Use Vent Connector

Table

Third Floor Appliance

Avaitabte Total

Height for Top Floor Appliance

t Rise

1 Rise

r-i—=

r—

P—

r I -]

Available Total

Height for Third

Floor Appliance

-f-~= up

Available Total

Height for Second

Roor Appliance

Listed Cap

Use Available Total Height for Top Floor Appliance and Combined InpiAof All Appliances on Common Vent

Third Connection Tee *

Available Total Height for Third Floor Appliance and Combined Input of Three Appliances (If Top Floor Appliance is Not Connected, Measure Total Height to Vent Top)

Second Connection Tee

Use Available Total Height for Second Floor Appliance and Combined Heat Input of Two Appliances

Use Vent Connector

Table

Second Root Appliance

Rrst Roor Appliance

Figure 14

—" 1

* Rise

Tee With Cap Optional

* Each Interconnection Tee is Same Size as

Segment of Common Vent Directly Above

Principles of Design of Multi-story Vents Using

Vent Connector and Common Vent Design Tables

First Connection Tee *

Design Vent Connector for First Floor Appliance as an Individual Vent of This Total Height for Input of Rrst Floor Appliance

VENTING TABLES

NOTES:

SIDEWALL VENTING

To assure both safe and proper operation, please carefully follow the instructions in this Addendum and the basic Installers' Information Manual, number 404200, supplied with this furnace, to install this new furnace.

ATTENTION, INSTALLER! After installing furnace, give the user;

—Users' Information Manual;

—Installers' Information Manual and this Addendum;

ATTENTION, USER! Your furnace installer should give you four important documents relating to your

furnace. Keep these as long as you keep your furnace. Pass these documents on to later furnace purchasers or users. If any of the four documents is missing or damaged, contact your installer or furnace manufac turer for replacement. For efficient service, please give your furnace model and serial number, listed in Section 1 of your Users' Information Manual. Throughout this Installers' Information Manual Addendum, we

frequently use the word "you" when referring to the person responsible for application, installation and

service of your furnace. Please remember to have only qualified service technicians perform these services.

WARNING: INDIVIDUALS WHO INSTALL THIS FURNACE, MUST HAVE THE TRAINING AND EXPERIENCE NECESSARY TO INSTALL HORIZONTAL GAS FURNACES. THEY MUST ALSO HAVE TRAINING AND EXPERIENCE NECESSARY TO INSTALL RELATED COMFORT AIR CONDITIONING APPLIANCES. IMPROPER INSTALLATION COULD CREATE A HAZARD, RESULTING IN DAMAGE, INJURY OR DEATH.

—Parts List — Warranty Information

While we have written these instructions as accurately and thoroughly as possible, they may not cover every system variation or contingency. Also, questions or interpretation may arise. For more information, solutions

to particular problems or clarification contact your local distributor. See the furnace rating plate for who to

contact.

Furnace installation must follow all applicable NATIONAL, STATE and LOCAL CODES.

WARNING: FOR YOUR SAFETY, WHAT TO DO IF YOU SMELL GAS. — DO NOT TRY TO LIGHT ANY APPLIANCE; — DO NOT TOUCH ANY ELECTRICAL SWITCH; DO NOT USE ANY PHONE IN

THE BUILDING;

— IMMEDIATELY CALL YOUR GAS SUPPLIER FROM A NEIGHBOR'S PHONE;

FOLLOW GAS SUPPLIERS INSTRUCTIONS;

— IF YOU CANNOT REACH GAS SUPPLIER, CALL FIRE DEPARTMENT.

IMPORTANT SAFETY NOTE: After installing the furnace, show the user how to turn off gas and electric

ity to furnace. Point out control and switch locations for turning off gas and electricity. Go over Section 6 of Users’ Information Manual and Section 31 of the Installers' Information Manual with user. Warn user to keep insulating materials away from furnace and combustion and ventilation air openings into furnace space. Explain to user that these openings provide fresh air to furnace, that is necessary for proper operation. Make sure user understands the importance of following all safety precautions.

920101

404810 A

1. HORIZONTAL VENTINO

В* Planning Tha Installation

NOTE: This induced Draft furnaces can be horizontally

vented through an outside wall without the addition

of an accessory power venter. Horizontally vented

Induced Draft furnaces must not be common

vented with any other appliance.

WARNINGt COMMON VENTING COULD ALLOW

PRODUCTS OF COMBUSTION TO ESCAPE THROUGH OTHER APPUANCE CONNECTED TO SAME VENT. THIS COULD RESULT IN COMBUSTION PRODUCTS COLLECTING IN STRUCTURE DURING USE, RESULTING IN INJURY OR DEATH.

A. Vantlng Motarlals

Use otily high temperature plastic pipe for horizontal venting of induced draft furnaces. Allowable materi als are Hart & Cooley's "U(travent” or Plexco’s "Plexvent". Install using these instructions and vent

manufacturers' instructions.

WARNINGt DO NOT USE DOUBLE WALL B-VENT,

SINGLE WALL C-VENT, PVC OR ANY OTHER PLAS TIC VENTING MATERIALS OTHER THAN THOSE LISTED BELOW. IMPROPER VENTING MATERIALS COULD DETERIORATE ALLOWING COMBUSTION PRODUCTS TO COLLECT IN STRUCTURE DURING USE, RESULTING IN INJURY OR DEATH.

AIR SPACE CLEARANCES

TO COMBUSTIBLE MATERIAL

Pipe Diameter

3" 4“

* Clearances to combustible material may be reduced when

combustible material is protected as described in current National Fuel Gas Code ANSI Z223.1/NFPA54, part 6 en titled "Installation of Specific Equipment”, subsection en titled "Clearances for Indoor Installation”.

NOTE; When high temperature plastic pipe is used on a

furnace converted to downflow position, be aware

that plastic pipe must be disconnected each time service or certain replacement parts are needed. When replacing plastic pipe after servicing or repair,

follow pipe joining instructions to assure a proper

seal.

NOTE: Do not insulate high temperature plastic pipe or

fittings.

1. Maintain clearances listed above to all sections of pipe, except at wai) thimble when horizontally vent ing.

2. Tools needed for installation are: Hacksaw - 24 teeth per inch, Level, Foil Tape, Hammer and Nails, Ma sonry Saw, Support Strapping and Tape Measure.

Clearance

5'*

9"*

VENT COMPONENTS

Hart/Cooley

Hem Description

5 ft. Pipe Length

3” Pipe

3UP5 90-Degree Sweep Elbow 3UES90 902299 45-Degree Elbow 3UE45 903958 Tee

3UT

Debris Screen 3U0S

Tee With Screen

—

Condensate Drain 3UDP 906646 Coupling

3UC 905630 4* Reducer 4UR3 905744 Sealant

DOW736RTV DOW736RTV Drain Tee-Lateral 3UT 901761 903929 Drain Tee-Vertical 3UT Wall Thimble Roof Flashing

Note (1) Note(1)

3UF

Vent Outlet Kit —

(1) Use 905295,905662, or 906972 (2) Use 906979,907084,907094 or 907103 (3) Use 905650,906971,905337 (4) Use 907078,908983,907089 or 907105

* This kit is supplied by manufacturer and is only required on models with

inputs of 120,000 or 140,000 BTUH.

Plexco

3" Pipe

Plexco

4” Pipe

901220 903851

905772

905773

905268

—

901971

903854

—

906882

903855

905807 905744

OOW736RTV

901467 903917

Note (2)

Note (3)

—

Note (4)

4059400*

3. a. Before installing vent system, be sure you have enough space to attain the required 1/4 inch rise

per foot of vent run. This rise is necessary for proper vent operation and condensate drainage.

b. Support vent every 5 feet horizontally and at all

elbows or couplings.

4. Locate vent wail penetration so that it allows a mini

mum of 1/4 inch rise per foot of vent run.

5. a. Locate vent termination so prevailing winds will

not affect its operation. When this is not possible,

consider using protection from strong winds such

as a fence.

b. Locale vent termination following the minimum

clearances listed below and see Figure 1.

1. At least 12 Inches above grade lave) or above normal snow accumulation level.

2. At least 4 feet below, 4 feet horizontally from or 1 foot above any door, window or gravity

air inlet to the building.

3. At least 4 feet horizontally from and not above any public walkways, regulators, re

lief valves or gas and electric meters.

4. At (east 6 feet from any inside corner formed by two exterior wails. 10 feet is desirable.

5. At least 4 feet horizontally and vertically from any soffit or under save vent.

6. At least 3 feet above or 10 feet from any forced air inlet to the building.

7. At lezist 10 feet from any adjacent building.

8. At least 4 feet from plants or shrubbery.

6. See below for allowable vent lengths and vent pipe sizes.

Furnace

Input

BTUH

40,000 60,000 80,000

100,000

120,000

140,l,"0

Vent

Pipe Size

3 inch 4 inch 4 inch 4 inch 4 inch 4 inch

Maximum

Lengths & Elbows

40 ft. & 4 elbows

40 ft. & 4 elbows 40 ft. & 4 elbows 40 ft. & 4 elbows 40 ft. & 4 elbows 40 ft. & 4 elbows

COMBUSTION PRODUCTS TO COLLECT IN STRUCTURE DURING USE, RESULTING IN INJURY OR DEATH.

WARNING« DO NOT DRILL HOLES IN

PLASTIC PIPE OR FITTINGS. DO NOT USE SHEET METAL SCREWS. RIVETS OR LOCK ING CLIPS IN PIPE OR FITTINGS. DRILLING, USING SCREWS OR RIVETS MAY CAUSE

PIPE OR FITTINGS TO CRACK, ALLOWING COMBUSTION PRODUCTS TO COLLECT IN STRUCTURE DURING USE, RESULTING IN INJURY OR DEATH.

NOTE: Do not cut pipe with a power saw. Cub

ting pipe with a power saw may cause cracking or shattering of pipe. Cracking or shattering pipe may prevent a com plete sea) when joining pipe,

2. Joining and Sealant

Use only approved sealant, Dow-Corning RTV-

736.

WARNING« USE ONLY APPROVED SEAL

ANT, DO NOT USE PVC CEMENT. FAILURE TO SEAL VENT SYSTEM WITH PROPER SEALANT AND PROCEDURE COULD ALLOW COMBUSTION PRODUCTS TO COLLECT IN STRUCTURE DURING USE, RESULTING IN INJURY OR DEATH.

NOTE: Be sure pipe and fitting surfaces are

clean and free of any oils, greases or dirt that could adversely affect the pipe seal.

a. Apply a 1/4 inch thick bead of eqaproved

sealant within 1/8 Inch of male pipe end. Apply entirely around outside of male pipe.

b. Push pipe and fitting completely together in

a twisting motion to help spread sealant.

c. When pipe seats in the fitting, check that a

complete ring of sealant is visible. A complete ring of sealant assures seal is gas-tight. Sealant cures in 24 hours. Use foil tape to hold joints together until cured, remove tape after sealant cures.

NOTE: A minimum vent length of 48 inches is necessary

for furnace service access.

C. V*nl Pipe Inslallatlon

1. Cutting

Cut pipe with a handsaw containing at least 24 teeth per inch. Cut pipe squarely.

WARNING« FAILURE TO CUT PIPE

SQUARELY COULD RESULT IN PIPE NOT SEAUNG PROPERLY, THIS COULD ALLOW

NOTE: Vent system can be used before sealant

cures.

3. Vent Outlet Kit (4059400) You must use vent outlet kit part number 4059400

when using high temperature plastic pipe on models with inputs of 120,000 and 140,000 Btuh. Vent outlet Kit 4059400 is only required on models with inputs of 120,000 and 140,000 Btuh.

Vent outlet kit is required to convert oval vent collar to round vent collar. Round vent collar will make furnace compatible for use with 4 inch diameter, high temperature plastic pipe.

4. Condensate Disposal

Vent system must contain a tee with drain plug

and means of disposing of condensate. The drain tee must be within the first 18 inches of vent run to prevent furnace condensate and rain from draining back into furnace.

•5" FOR 3" OIA. PIPE *9" FOR 4.' DlA. PIPE

TO coMsusTieiE

material

NOTE: tf flexible vinyl drain tube is in an area

that may expose condensate to below freezing temperatures, use heat tapes. Use heat tapes that will not melt conden sate tubing materia).

5. Wall Penetration a. When penetrating a non-combustible wall,

make the hole just large enough for vent pipe. Use approved sealant material to sea) vent pipe to the non-combustible wait. See Figure 4,

HIGH TEMPERATURE

*SEE SECTION B. "PLANNING THE INSTALLATION’

DRAIN TEC

Figure 2

Attach correct size flexible vinyl drain tubing to

drain plug. Fill the drain tube trap with a water

seal. This will prevent combustion products from escaping through the flexible vinyl drain tube. See Figure 3.

WARNINGt FAILURE TO FILL FLEXIBLE

VINYL DRAIN TUBE TRAP WITH A WATER SEAL COULD ALLOW COMBUSTION PROD UCTS TO COLLECT IN STRUCTURE DURING USE, RESULTING IN INJURY OR DEATH.

b, When penetrating a combustible wall, you

must use a listed wall thimble. All thimbles are adjustable to fit variable wall thicknesses and are listed in the parts list on page 2.

WARNINGS FAILURE TO USE A WALL

THIMBLE COULD CAUSE COMBUSTIBLE WALL MATERIAL TO IGNITE RESULTING IN DAMAGE, INJURY OR DEATH.

NOTE: Use Figure 5 In conjunction with

instructions below to properly install wall thimble.

1. Cut an 8 1/2 inch diameter round hole in

wall. Locate it where you can maintain the necessary 1 /4 inch per foot rise in the vent system.

2. Hold thimble in place by a):^lying ap

proved sealant to male half before as sembling. Insert thimble into wall.

3. After inserting thimble, secure to outside

and inside wails with nails or screws. Seal thimble to inner and outer walls with approved sealant material.

4. Insert a section of vent pipe through

thimble that leaves at least 14 inches of vent pipe protruding from thimble.

5. To prevent vent pipe from moving in

thimble, attach stainless steel hose clamp to both pipe ends extending from thimble. See Figure 5.

D* V*nl Tarmlncrtlon T«* Installfillon

Use only a termination tee with debris screen for vent termination. See below for allowable termination tees.

Hart/Coolsy

Plezco Plexco

Item Description Snnpe ~3““Pip0

Termination Tee Debris Screen

3UT

3UDS

—

Termination Tee with

Debris Screen

—

901971

Caiitlom Do not locate the vent termination closer

than 4 feet to plants or shrubbery as combustion products may stunt or kill them. Also see section B for proper vent termination tee clearances.

Cautions In some Instances, excessive conden>

sate at the termination tee can cause staining or damage to the outside wall. Sealing or shielding of outside wall with a corrosion resistant material (such as aluminum sheet) may be necessary.

1. Installing Termination Tee a. Use approved sealant to join termination tee

to section of vent pipe protruding from thimble. Termination tee must be in vertical position. See Figure 5.

b. Make sure debris screens are in place.

ÏTTpe“

—

906882

Caution: Do not step on, sit or place any weight on

termination tee. If termination tee Is dis

lodged, furnace may not operate.

WARNlNOt DO NOT STEP ON, HIT OR PLACE ANY

WEIGHT ON TERMINATION TEE. IF TERMINATION

TEE IS MISHANDLED, VENT SYSTEM MAY BECOME

DISCONNECTED AT FURNACE ALLOWING FLUE PRODUCTS TO COLLECT IN STRUCTURE DURING USE, RESULTING IN INJURY OR DEATH.

2. VKRTICAL VENTING

When using high temperature plastic pipe, vent system must be dedicated and is not to be common vented with any other appliance.

WARNINGS COMMON VENTING COULD ALLOW

PRODUCTS OF COMBUSTION TO ESCAPE THROUGH OTHER APPLIANCE CONNECTED TO SAME VENT. THIS COULD RESULT IN COMBUSTION PRODUCTS COLLECTING IN STRUCTURE DURING USE, RESULTING IN INJURY OR DEATH.

A. Starting Vant System

You may use high temperature plastic pipe to verti cally vent this induced-draft furnace. Use instructions in horizontal venting section for proper air space clearances to combustible materials, pipe sizing, allowable runs,joining,cutting, condensate disposal, inducer transition, and plaustic vent transition kit. See Figures 6 and 7 for correctly started vertical vent systems.

c. The inside of the termination tee must be a

minimum of 14 inches from outside wall. See Figure 5 for a correctly completed in* stallation.

3" and 4'* Thimble

Figure 6

B* V*nt Termination

Only a termination tee with debris screen is allowed for vent termination. See Section

D., Vent Termination Tee Instailation for allowable termination tee.

NOTE: Terminating vent system with other

than terminating tee can cause im proper furnace operation. See Fig ure 8 for proper vertical vent termi nation.

Vent this furnace using these instructions,

Installers' Information Manual and Part 7 of Current National Fuel Gas Code ANSI

2223.1/NFPA 54. Also, meet requirements of local utilities and other local code authori ties.

PIPE STORM COLLAR

PUSHING

SIZE OF OPENING VARIES ACCORDING TO THE PITCH OF THE ROOF.

NEED 5" MIN. AIR SPACE FOR 3“ PIPE NEED 9“ MIN. AIR SPACE FOR 4" PIPE

FIRESTOP

CHASE: •5" AIR SPACE REQ'D. BETVi/EEN 3" PIPE AND COMBUSTIBLE MATERIAL.

4" PIPE AND COMBUSTIBLE MATERIAL.

*SEE SECTION B. "PLANNING THE INSTALLATION'

*9" AIR SPACE REQ’D. BETINEEN

Figure 8

Bard 403293A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual