Williams 3509612, 2509612, 2509622 User Manual

INSTALLATION & OPERATING

INSTRUCTION MANUAL

owners

manual

MODEL NOS.

2509612 2509622

GRAVITY WALL FURNACE

READ THIS OWNERS MANUAL

CAREFULLY BEFORE YOU INSTALL

YOUR NEW IMPROVED EFFICIENCY

!ii_I :!i_

MODEL NO_

2509611 2509621

3509611

3509621

5009611

5009621

FOR USE WITH

LIQUEFIED

PETROLEUM (L.P.)

GAS ONLY

Save This Manual For

Future Reference.

NOTE: CANADIAN MODEL NUMBERS THIRD

DIGIT FROM LEFT TO BE: 1 FOR BASIC ALTITUDES

2 FOR HIGH ALTITUDES

EXAMPLE: MODEL: 3509612 BECOMES 3519612

(0-2000 FT, BASIC ALTITUDE) OR BECOMES 3529612

(2000-4000 FT. HIGH ALTITUDE)

GAS-FIRED TOP VENT

WILLIAMS WALL FURNACE

WARNING: If the information in this|

manual is not followed exactly, a fire or ex- plosion may result causing property damage, personal injury or loss of life.

-- Do not store or use gasoline or other flammable vapors and liquids in the

vicinity of this or any other appliance.

-- WHAT TO DO IF YOU SMELL GAS

• Open all windows.

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any phone in your building.

• Extinguish any open flame.

• Immediately call your gas supplier

from a neighbor's phone. Follow the

gas supplier's instruction.

• If you cannot reach your gas supplier, call the fire department.

Installation and service must be per- formed by a qualified installer, service agency or the gas supplier.

WARNING: Improper installation, adjust-

ment, alteration, service or maintenance can cause injury or property damage.

Refer to this manual. For assistance or additional information consult a qualified

installer, service agency or the gas supplier.

WARNING: Do not install any of these fur- naces (Natural or L.R Gas) in mobile

homes, trailers, or recreational vehicles.

Williams Furnace Co., 225 Acacia St., Colton, CA 92324 U.S.A

PRINTED IN US,A. 5/97 P322085

Contents

Williams Installation Policy ...................... 2

Introduction .................................. 3

Basic Description .............................. 3

Helpful Installation Information ................... 3

Safety Rules ................................. 4

Unpack Your Furnace .......................... 5

Basic Tools Needed ............................ 5

Basic Materials ............................... 5

Optional Accessories ........................... 5

Installing Your Wall Furnace ..................... 6

Locating Wall Furnace and Thermostat ............ 6

Combustion & Ventilation Air ................... 7-9

Recessed Mount Installation .................. 10-11

Surface Mount Installation ...................... 12

Vent Installation .............................. 12

Mount The Furnace ........................... 13

Gas Supply and Piping ...................... 14-15

Thermostat Installation...................... 15-16

Start Up Procedure ......................... 17-18

Operating Your Furnace ..................... 18-23

How To Care For Your Furnace ............... 24-25

Furnace Technical Information .................. 25

TROUBLESHOOTING CHART ................ 26-27

Replacement Parts ......................... 28-35

Blower Accessory (2901) .................... 36-37

SERVICE HINTS ...................... Back Cover

How To Order Repair Parts............. Back Cover

Your Warranty

The Manufacturer, Williams Furnace Co.. warrants this wall furnace or heater to the original purchaser under the following conditions: LIMITED ONE-YEAR WARRANTY

1. Any part thereof which proves to be defective in material or workmanship within one year from date of original purchase for use will be repaired or replaced at the Manufacturer's option, FOB its factory.

2. No liability is assumed by the Manufacturer for removal or installation labor costs, nor for freight or delivery charges,

LIMITED EXTENDED WARRANTY

1. In addition to the above limited one-year warranty on the complete unit, any heat exchanger which burns out or rusts under normal installation, use and service conditions during a period of nine years following expiration of the one-year warranty period will be exchanged for a like of functionaJly similar part, FOB Manufac-

turer's factory.

2. No liability is assumed by the Manufacturer for removal or installation labor costs, nor for freight or delivery charges.

LIMITATIONS

1. THIS LIMITED WARRANTY IS THE ONLY WARRANTY MADE BY THE MANUFACTURER. IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR

ANY PARTICULAR PURPOSE ARE LIMITED TO THE SAME ONE YEAR TERM AS THIS EXPRESS WARRANTY. UNDER NO CIRCUMSTANCES SHALL THE MANUFACTURER BE LIABLE FOR INCIDENTAL, CONSEQUENTIAL, SPECIAL OR CONTINGENT DAMAGES OR EXPENSES ARISING DIRECTLY OR INDIRECT-

LY FROM ANY DEFECT IN THE PRODUCT OR ANY COMPONENT OR FROM THE USE THEREOF THE REMEDIES SET FORTH HEREIN ARE THE EXCLUSIVE REMEDIES AVAILABLE TO THE USER AND ARE IN LIEU OF ALL OTHER REMEDIES.

Some states do not allow limitations on how long an implied warranty lasts, and some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitations or exclusions may not apply to you.

2. This warranty does not include any charge for labor or installation.

3. This warranty does not extend to painted surfaces nor to damage or defects resulting from accident, alteration, misuse or abuse, or improper installation.

4. This warranty does not cover claims which do not involve defective workmanship or materials.

DUTIES OF THE CONSUMER

1. The heating equipment must be installed by a qualified installer and operated in accordance with the installation and homeowner's instructions furnished with the

equipment

2. Any travel, diagnostic costs, service labor, and labor to repair the defective unit will be the responsibility of the owner.

3. A bill of sale, cancelled check, payment record or permit should be kept to verify purchase date to establish the warranty period

4. Have the instafler enter the requested information in the space below.

GENERAL

1. The Manufacturer neither assumes nor authorizes any person to assume for it any other obligation or liability in connection with said equipment.

2. Service under this warranty should be obtained by contacting your dealer. Provide the dealer with the model number, serial number and purchase date verification.

3. If. within a reasonable time after contacting your dealer, satisfactory service has not been received, contact: Customer Service Department, 225 Acacia St.. Colton. CA 92324, for assistance,

4. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS. AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE.

INSTALLATION INFORMATION

Model No,

Orig. Purchaser Address.

Serial No.

City and State Zip Dealer

Address City and State. Zip

Installation date Signed by_ .(Dealer or authorized representative who certifies that this appliance has been installed in accordance with Manufacturer's instructions and

local codes.)

--2--

A Word From The Manufacturer

Dear Customer, Toset up our furnace assembly procedures, several hundred quafity assurance, safetyaudit and design performance tests

have been conducted according to the standards provided by the American National Standards Institute, the Department of Energy and our certification agency -- the American Gas Association Laboratories.

This was done to assure you of receiving the best value and most reliable appliance of its type available today. We are confident that your Williams furnace can provide you years of low cost, efficient, heating comfort. Thank you for purchasing a Williams furnace.

Sincerely. Employees of Williams Furnace Company

Introduction

Please read our instructions before you install and use your furnace. This will help you obtain the full value from this fur-

nace. It could help you avoid needless service costs, if the answer to the problem is found within this instruction manual.

Basic Description

Vented wall furnaces are shipped ready to install in a 2 x 4 stud wall, with studs 16 inches center to center.

Always consult your local heating or plumbing inspector, building department or gas utility company regarding regulations, codes or ordinaces which apply to the installa-

tion of a vented wall furnace. No electric power is required unless furnace is equipped

with an optional blower accessory.

The efficiency rating of this appliance is a product ther-

mal efficiency rating determined under continuous operating conditions and was determined independent of any installed system.

Single wall models described in this manual, are install- ed in a 2 x 4 stud wall between studs spaced 16 inches center to center, or may be surface mounted to a wall us-

ing free standing kit 4901. Warmed air is discharged into the room in which the fur-

nace is located. The furnace contains a single multi-slot gas burner.

Combustion air is drawn in from the room where the fur- nace is located and is vented out of the top of the furnace

vertically through vent piping in the stud space to a roof vent top. (Vent equipment is not supplied with furnace, but

may be obtained from WILLIAMS.)

Convection causes room air to circulate from the floor up- ward along the front, back, and side of the heat exchanger,

and then back to the room. The furnace heat exchanger is built of heavy gauge steel

treated for corrosion resistance. The furnace cabinet is also constructed of heavy gauge steel and has a neutral

beige color enamel paint finish. The front of the cabinet is fully Iouvered.

The furnace controls are located behind an access door on the lower front of the furnace. All models are equipped

with AGA/CGA listed gas valves and pilots. Models: 2509611, 2509612, 3509611, 3509612, 5009611,

5009612 are equipped with a built-in thermostat control. Models: 2509621, 2509622, 3509621, 3509622, 5009621,

5009622 are supplied with a wall thermostat. NOTE, ALL MODELS:

This appliance is equipped with a vent safety shutoff

system, designed to protect against improper venting of

combustion products. Operation of this wall furnace when

not connected to a properly installed and maintained ven- ting system or tampering with the vent safety shutoff system can result in carbon monoxide (CO) poisoning and

possible death.

Helpful Installation Information

The following booklets will help you in making the

installation:

ANSI/NFPA 70, or current edition "National Electrical Code." In Canada: CSA C22.1 Canadian Electrical Code.

American National Standard Z223.1 or current edition "Na- tional Fuel Gas Code."

Obtain from--American National Standards Institute, Inc., 1430 Broadway, New York, N.Y. 10018. In Canada:

CAN/CGA B149.

--3--

Safety Rules

WARNING

READ THESE RULES AND THE INSTRUCTIONS

CAREFULLY. FAILURE TO FOLLOW THESE

RULES AND INSTRUCTIONS COULD CAUSE A MALFUNCTION OF THE FURNACE. THIS COULD RESULT IN DEATH, SERIOUS BODILY INJURY,

AND/OR PROPERTY DAMAGE.

INSTALLATION MUST CONFORM TO LOCAL CODES. IN

THE ABSENCE OF LOCAL CODES, INSTALLATIONMUST CONFORM WITH THE NATIONAL FUEL GAS CODE, ANSI Z223.1. THE APPLIANCE, WHEN INSTALLED, MUST BE

ELECTRICALLY CONNECTED AND GROUNDED IN

ACCORDANCE WITH LOCAL CODES OR, IN THE ABSENCE OF LOCAL CODES, WITH THE CURRENT

NATIONAL ELECTRICAL CODE ANSI/NFPA NO. 70.

IN CANADA

1. INSTALLATION MUST CONFORM TO LOCAL CODES OR, IN THE ABSENCE OF LOCAL

CODES, THE CURRENT CAN/CGA B149 IN- STALLATION CODE.

2. THE APPLIANCE, WHEN INSTALLED,MUST BE ELECTRICALLY CONNECTED AND GROUND-

ED IN ACCORDANCE WITH LOCAL CODES OR, IN THE ABSENCE OF LOCAL CODES, WITH

THE CURRENT CSA C22.1 CANADIAN ELEC- TRICAL CODE.

3. FIELD CONVERSIONS FOR HIGH ALTITUDE ARE NOT PERMITTED IN CANADA.

4. REFERENCE IS MADE IN THIS MANUAL

REGARDING GAS TYPE AS L.RG. BE ADVISED

THAT L.P.G. IS NOT AVAILABLE IN CANADA,

REFER TO PROPANE/L.R GAS.

USE ONLY MANUFACTURER'S REPLACEMENT PARTS. USE OF ANY OTHER PARTSCOULD CAUSE

INJURY OR DEATH.

DO NOT install this furnace in an alcove.

DO NOT install these furnaces in a travel trailer, recreational vehicle or mobile home.

MAINTAIN all clearances specified in section "Locating Wail Furnace and Thermostat" and "Vent

Installation."

BE SURE furnace is for type of gas to be used. Check

the rating plate by the gas valve in the lower cabinet.

Do not change it to use other gases. Unsafe opera-

tion could result and could cause bodily injury and death.

For Natural gas, the minimum inlet gas supply

pressure for the purpose of inputadjustment is 5" col-

umn. The maximum inlet gas supply pressure is 7"

water column.

For L.F_gas, the minimum inlet gas supply pressure

for the purpose of input adjustment is 11" water col-

WARNING

DO NOT USE THIS HEATER IF ANY PART HAS BEEN UNDER WATER. IMMEDIATELY CALL A QUALIFIED SERVICE TECHNICIAN TO INSPECT THE HEATER AND TO REPLACE ANY PART OF THE CONTROL SYSTEM AND ANY GAS CONTROL WHICH HAS BEEN UNDER WATER.

umn. The maximum inlet gas supply pressure is 13"

water column.

ANY SAFETY SCREEN, GUARD OR PARTS RE-

MOVED FOR SERVICING ANAPPLIANCE MUST BE REPLACED PRIOR TO OPERATING THE AP-

PLIANCE TO AVOID PROPERTY DAMAGE, BODILY INJURY OR DEATH.

INSTALL the furnace vent directly tothe outdoors, so

that harmful gasses willnotcollect insidethe building. Follow the venting instructions for your type installa- tion exactly. Use only the type and size of vent pipe

and fittings specified.

9. BE SURE to provide for adequate combustion and ventilation air. See page 7. The flow of this air to the

furnace must not be blocked.

10. NEVER vent flue gases intoanother room, a fireplace

or any space inside a building. This could cause pro- perty damage, bodily injury or death.

11. NEVER test for gas leaks with an open flame. Use

soap suds to check all gas connections. This will avoid

the possibility of fire or explosion.

12. ALLOW furnace to cool before servicing. Always shut off electricity and gas to furnace when working on it.

This will prevent any electrical shocks or burns.

13. DUE TO HIGH TEMPERATURES, locate the furnace out of traffic and away from furniture and draperies.

14. ALERT children and adults tothe hazards ofhigh sur- face temperature and to keep away to avoid burns or

clothing ignition.

15. CAREFULLY supervise young children when they are in the same room with the furnace.

16.

DO NOT place clothing or other flammable material on or near furnace.

17.

INSTALLATION and REPAIR must be done by a quali- fied service person. The appliance should be inspected before use and at least annually by a professional serv- ice person. More frequent cleaning may be required

due to excessive lint from carpeting, bedding material,

etc. It is imperative that control compartments, burners

and circulating air passages be kept clean.

18.

BEFORE INSTALLING: Toavoid electrical shock, turn

off electrical circuits that pass through the wall where you are going to install the furnace.

19.

BE AWARE of good safety practices by wearing per-

sonal protective equipment such as gloves and safe- ty glasses toavoid being injuredby sharp metal edges

in or around furnace andwhile cuttingor drillingholes in wood and or sheet metal.

20.

CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper

and dangerous operation. Verify proper operation after

servicing.

--4w

Unpack Your Furnace

The shipping carton contains the furnace and the items

needed to install it:

The furnace isshipped assembled. The cabinet must be

removed for the furnace installation.

1. Open carton and carefully lift off cabinet face panel.

2. Remove small parts bag and header plate from lower portion of furnace.

3. Remove thermostat (wall thermostat models).

Basic Tools Needed

Hand drill or properly grounded electric drill. Expansion bit 1/2 inch to 1-5/8 inch or 1/2 inch and

1-1/2 inch blade bits

118 inch drill bit (metal) 6 foot folding rule or tape measure Screwdriver (medium blade)

Pliers (wire cutting) Hammer

Hole saw - 2 inches

4. Stand Furnace upright.

5. Properly dispose of shipping material.

NOTE

Check the burner rating plate, located in burner compart-

ment, to make sure your furnace is equipped to operate

on the type of gas available (either Natural or L.P. Gas).

DO NOT convert unit from Natural Gas to L.R Gas or from L.R Gas to Natural Gas.

Screwdriver (phillips head) Stud Locator or small finish nails

Tin Snips 8 inch adjustable wrench

12 inch adjustable wrench

Key hole saw or sabre saw 2 - 10 inch or 12 inch pipe wrenches Gloves and safety glasses

Basic Materials

Pipe and fittings to make connections to furnace. Pipe Joint Compound resistant to L.R gases. *Electrical wiring supplies as needed.

*Minimum wire size is #14 gauge copper.

*Electrical supplies only required if accessory blower is

being installed.

Optional Accessories

Free Standing Kit 4901 may be used with all single models. This kit allows the furnace to be mounted on the

surface of a wall.

Rear Outlet Register 6901 may be used with all single

models when recessed into a standard 2 inch x 4 inch in- terior stud partition. This kit directs some of the heated

air into the room opposite the one in which the furnace

is installed. Blower Accessory 2901 may be used on all models and

mounts on top of the furnace. This blower increases cir- culation of warm air through the heated space. A 115V outlet adjacent to the furnace is required.

Oval B/W Vent Kit 9901

vent kit contains 4 feet of oval double-

walled vent pipe, plate spacers and base plate or hold-

A type "BW" gas vent kit for vertical venting such as a

WILLIAMS Oval Vent Kit 9901.

Extra lengths of double-wall vent pipe may be needed,

depending on height or length of run.

down plate that starts the venting from the top of furnace. See Page 12 for some additional items you may need.

ALL MODELS: Decorator Face Panel Colors

Various Face Panel colors may be used on all models. All are constructed of heavy gauge steel with your choice of colored enamel paint finish.

4915 (Almond) 4916 (Black) 4917 (Red)

4918 (white) NOTE

Kits are identified on their carton by the manufacturing number 4901, 6901 and 2901 respectively.

--5--

Installing Your Wall Furnace

The following steps are all needed for proper installation and safe operation ofyour furnace. If you have any doubts

as to any requirements, check with local authorities.

All of CHECKS AND ADJUSTMENTS in the Start-Up Procedure on page 17 are vital to the proper and safe

operation of the furnace. Be sure they are done.

Obtain professional help where needed.

Locating Wall Furnace & Thermostat

The furnace is installed between 2 x 4 inch wall studs spaced on 16 inch centers or stud space can be framed

in to 16 inches. See page ft (Fig. 9). Consider the following points before attempting to install

the furnace.

CAUTION

Do not make cut-outs in wallorceiling before check-

ing inthe attic for ceilingjoist locations and proposed venting.

1. Place the furnace near the center of the space to be heated for good air circulation. Do not put it behind a

door or draperies. Do not install it in a closet, alcove,

hallway or other confined space where the furnace could be isolated by closing doors to the heated space. Do not locate the furnace where a door could swing

over the front panel, or where circulation could be

retarded by furniture or cabinets. For large homes or homes with spread-out floor plans,

two or more furnaces are recommended.

MINIMUM SPACE

T MIN.

CEILING

:URNACE

WALL

I 1 2-1/2 APPROX.

16" MIN,

4" MIN. TO CLOSEST SIDE WALL

NOTE: MAXIMUM

RECESS DEPTH OF SINGLE MODELS IS 41/£'

"_ L__ BARE FLOOR

2. Check the minimum spacing needs as shown in Fig. 1.

3. The top of the furnace must be at least 16 inches from the ceiling.

WARNING: DANGER OF PROPERTY DAMAGE, BODILY INJURY OR LOSS OF LIFE. DO NOT INSTALL FURNACE I

IN ANY AREA WHERE OXYGEN IS IN USE.

When furnace is properly installedwith legs restingon floor plate, it sets the dimension from the face panel

to the bare floor. (21/2inches approximately depending on the thickness of floor plate).

A protectivebarrier (metal or wood), cut to match width

and depth of furnace, should be used to cover over any floor coverings such as carpet or sheet vinyl that might

be finished off under the furnace.

NOTE

At no time should the dimension from the bottom of the face panel to the protective barrier be less than 11/2

inches.

5. The side of the furnace may be as close as 4 inches to a wall. The recessed portion may have 0 inch

clearance to combustible material.

To provide adequate clearance and service access, the front of the furnace must face the open room. Do not

place obstructive furniture closer than four feet to front

of cabinet.

After picking a location, inspect the wall, floor, attic and

roof areas. Make sure there are no pipes, wiring,

bracing, etc., that would interfere with furnace or vent installation.Ifrequiredmove them orpick a new location.

Be sure that gas piping and electrical wiring can be brought to the location. See sections covering piping

and electrical wiring for your type of furnace mounting. (Electrical wiring only required for optional blower

accessory.)

If your furnace is a wall thermostat model, locate the

thermostat about 5 feet above the floor on an inside wall where it will sense the average room temperature.

Avoid the following:

HOT SPOTS: Concealed pipes or

ducts

Fireplaces Registers

TV sets Radios

Lamps Direct sunlight

Kitchen

COLD SPOTS: Concealed pipes or

ducts

Stairwells-drafts Doors-drafts

Unheated rooms on

other side of wall

DEAD SPOTS:

Behind doors

Corners and alcoves

After picking a location that meets the requirements make sure there are no pipes, wiring, or anything else that would interfere with thermostat installation. If required, move

them or pick a new location.

--6--

Combustion & Ventilation Air

WARNING

DANGER OF ILLNESS

BODILY INJURY OR DEATH THE FURNACE AND ANY OTHER FUEL BURNING APPLIANCE MUST BE PROVIDED WITH ENOUGH

FRESH AIR FOR PROPER COMBUSTION AND VENTILATION OF FLUE GASES. MOST HOMES WILL REQUIRE THAT OUTSIDE AIR BE SUPPLIED

INTO THE FURNACE AREA.

The high cost of energy for home heating has brought

about new materials and methods used to construct or remodel most current homes. The improved construction

and additional insulation has reduced the heat loss and made these homes much tighter around windows and

doors sothat infiltrated air is minimal. This creates a prob- lem to supply combustion and ventilation airfor gas-fired or other fuel burning appliances. Any use of appliances that pullair out of the house (clothes dryers, exhaust fans,

fireplaces, etc.) increases this problem and appliances could be starving for air.

The combination of a tight energy efficient home with the use of exhaust fans, fireplaces, clothes dryers, and gas appliances results in more and more air being drawn from the house until fresh air may be sucked into the house down the furnace flue or fireplace chimney. Carbon

monoxide can be the result. Carbon monoxide or "CO" is a colorless, odorless gas produced when fuel is not

burned completely or when the flame does not receive sufficient oxygen. Automobiles, charcoal, wood fires and

improperly vented or air-starved coal, oil and gas furnaces or other appliances can produce carbon monoxide.

Be aware of these air starvation signals:

1. Headaches, nausea, dizziness

2. Excessive humidity -- heavily frosted windows, moist "clammy" sensation.

3. Fireplace smokes, won't draw

4. Furnace flue backs up

AIR REQUIREMENTS

The requirements for providing air for combustion and ven- tilation are listed in the National Fuel Gas Code NFPA

54/ANSI Z223.1 (in Canada: CAN/CGA B149). Most homes

will require that outside air be supplied to the furnace area

by means of ventilation grilles or ducts connecting direct- ly to the outside or spaces open to the outdoors such as attic or crawl space. The only exception is when the fur-

nace area meets the requirements and definitions for an unconfined space with adequate air filtration.

All air openings and connecting ducts must comply with

the following: IF THE FURNACE IS INSTALLED IN AN AREA WITH

ANOTHER GAS APPLIANCE(S), THE TOTAL INPUT

RATING OF ALL APPLIANCES MUST BE CONSIDERED

WHEN DETERMINING THE FREE AREA REQUIRE-

MENTS FOR COMBUSTION AND VENTILATION AIR

OPENINGS.

WARNING

DANGER OF PROPERTY DAMAGE,

BODILY INJURY OR DEATH

EVEN WHEN HOUSE MEETS REQUIREMENTS FOR UNCONFINED SPACE WITH ADEQUATE AIR

INFILTRATION IT IS RECOMMENDED THAT A FRESH AIR INTAKE BE INSTALLED TO LESSEN

THE POSSIBLE DANGERS FROM ANY FUTURE CHANGES ON THE HOME,

Ducts must havethe same cross-sectionalarea as the free area of the openings to which they connect.

The minimum dimension of rectangular air ducts must not

be less than 3 inches in length or 3 inches in height.

LOUVERS/GRILLES AND SCREENS COVERING FREE AREA OPENINGS

If screen is used to cover opening(s), it must not be smaller

than 1/4inch mesh. Use the free area of a louver or grille to determine the size opening required to provide the free

area specified. If the free area is not known, assume a 20% free area for wood and a 60% free area for metal

louvers or grilles.

EXAMPLE 1. FURNACE LOCATED IN UNCONFINED SPACE,"

*An unconfined space must have avolume of a minimum 50 cubic feet per 1000 Btuh of total of all appliances in area. Adjoining rooms may be included only if there are no doors between the rooms, or if special provisions are made such as ventilation grilles installed between con-

necting rooms.

Fig. 4, page 8 shows the minimum area in square feet,

based on 8 foot ceiling heights, required for different Btuh

input ratings.

A. INFILTRATION AIR

If your furnace is in an open area unconfined space*)

the air that leaks through the cracks around doors

and windows may be enough for combustion and

ventilation air. The doors should not fit tightly. The

cracks around windows should not be caulked or

weather stripped.

VENT PIPE

DRAFT HOOD

__1

,A,C.

TYPICAL

]

WATER

HEATER

WALL

FURNAC E OPENING

\DRAFT

HOOD

--7--

Combustion & Ventilation Air (Con't)

To determine if infiltration air is adequate, perform the following checks:

1. Close all doors and windows. 11you have a fire- place, start a fire and wait until flames are burning

vigorously, (or flue damper can be closed),

2. Turn on all exhausting devices, such as:

- kitchen and bathroom exhaust fans.

- water heaters (gas and electric).

3. Turn on all vented gas appliances, such as:

- heating equipment (includes any room heaters)

- water heaters.

4. Wait ten (10) minutes for drafts to settle down.

5. Check for drafthood spillage at each appliance. (Hold a lighted match 2 inches from draft opening. See Fig. 2, page 7).

B. No Spillage

Match flame pulls toward drafthood -- this indicates sufficient infiltrationair. Return exhausting devices and

appliances to the condition you found them.

C. Drafthood Spills

If there is spillage at a drafthood (match goes out or flame wavers away from drafthood):

1. Check for plugged flue connectors and chimneys. Check and repair stoppage and test again.

2. If you have a fireplace, open a window or door near the fireplace and then check for spillage.

a. If spillage stops, do not use the fireplace without

a nearby window or door open until you can supply fresh air by a permanent duct.

3. If you have kitchen and bathroom exhaust fans, turn them off and check for spillage.

a. If spillage stops, do not use exhaust fans until

you can supply fresh air by a permanent duct. Circuit breakers for fans should be turned off if

possible.

WARNING

DANGER OF ILLNESS,

BODILY INJURY OR DEATH

DRAFTHOOD SPILLAGE WITH UNOBSTRUCTED VENTS, INDICATES THAT ADDITIONAL AIR

MUST BE BROUGHT INTO THE STRUCTURE FROM THE OUTSIDE. KEEP A WINDOW OPEN

(MINIMUM 2 INCHES) NEAR THE APPLIANCE

UNTIL A PERMANENT AIR DUCT IS INSTALLED.

Provide an opening(s) having a total free area of 1 sq. inch per 4000 Btuh of the total of all appliances. The required area is shown in Fig. 7, page 9.

FRESH AIR DUCT

HOLES FROM VENTILATED ATrJc INTO STUD SPACE

SEE FrG. 8

AIR GRILLE TO STUD SPACE

I 12" MAXFROM FLOOR

HOLES FROM VENTILATED CRAWL SPACE INTO STUD SPACE

HOLE IN BOTTOM OR BACK OF FURNACE INTO OPEN STUD SPACE OR CRAWL SPACE

SEE FIG 7

1. Duct must terminate at a point not more than 1 foot above the floor.

2. Duct size must be at least I inch of free area for each 4000 Btuh of input of all appliances in area.

MINIMUM AREA IN SQUARE FEET

4000 Btuh Per

Square Inch

Opening

Round Rectangular

Duct Duct

4"DIA. 3"X3"SQ. 4"DIA. 3"X3"SQ. 4"DIA. 3"X4"SQ.

4"DIA. 3"X4"SQ. 4"DIA. 3"X5"SQ.

41!2"DIA. 3"X5"SQ.

Max. Btuh

Input

30,000

35,000

40,000

45,000

50,000 60,000

*Unconfined Space

Min. Area In Sq. Ft,

8' Ceiling Height

188 219 250 281 312 375

4. Spillage means air starvation and a fresh air duct or air intakes must be installed to provide air direct-

ly to the furnace or other gas appliance.

D. If spillage exists or when the furnace is in a building

of tight construction where the windows and doors are weatherstripped, air for combustion and ventilation must be obtained from outdoors or space open to the

outdoors.

*Can be two or more rooms joined by ventilation grilles.

EXAMPLE 2. FURNACE LOCATED IN CONFINED SPACE

If furnace is installed in a confined space, it must be pro-

vided with free air for proper combustion and ventilation

of flue gases by one of the following methods:

--8--

Combustion & Ventilation Air (Con't)

A. All Air From Inside Building: If the confined space adjoins an unconfined space as

defined in EXAMPLE 1, providetwo permanent openings, one within 12 inches of the top and one within 12 inches ofthe bottomof the room connecting directly to unconfin- ed space. Each opening must have afree area of at least 100 square inches or 1 square inch per 1000 Btuh com- bined input of appliances in one room if combined input

exceeds 100,000 Btuh.

WARNING

DANGER OF PROPERTY DAMAGE,

BODILY INJURY OR DEATH

THE ADJOINING UNCONFINED SPACE MUST

HAVE ADEQUATE AIR INFILTRATION AS DEFINED IN EXAMPLE 1.

FOR EXAMPLE: Your furnace is rated at 50,000 Btu per hour.The water heater is rated at 30,000 Btu per hour.The total is80,000 Btu per hour. Youneed two grilles, each with

100square inches of free opening. Metal grilleshave about

60% free area, so you need two metal grilles each with

160 square inches of Iouvered area.

Refer to Fig. 5, which shows grille installation. Using the previous example, the two connecting rooms

plus the closet must equal at least 500 sq. feet to handle

the combined input 50,000 plus 30,000.

outdoors or spaces open to outdoorssuch as atticor crawl

spaces. Provide two permanent openings, one within 12 inches of

top, one within 12 inches of bottom of room connecting

directly,or by using ducts,with the outdoor or areas open

to outdoors.

If opening connects directly to, or with vertical ducts, the

free area of each opening must be at least 1 square inch

per 4000 Btuh combined input of appliances in area. If horizontalductsare used, the free area ofeach opening

must be at least 1 square inch per 2000 Btuh combined input of appliances in area.

FOR EXAMPLE: Your furnace is rated at 50,000 Btu

per hour. The water heater is rated at 30,000 Btu per hour. The total is 80,000 Btu per hour. You need two

grilles, each with 20 square inches of free opening, unless connected by horizontal ducts which would re-

quire each grille or opening to have a free area of 40 square inches.

3 OR CRAWL SPACE

CH_MN[ y

OR GAS VENT

GRILLES CONNECTING ROOMS TO

MAKE UNCONFINED SPACE

VENTILATION GRILLES CONNECTING TWO ROOMS TO MEET UNCONFINED

$PAC_

I I

, I

200 SO IN

MINIMUM

BETWEEN

LARGE ROOMS

1<[ COMMENOt O

FRESH AIR DUCT rPilO CRAWL $PAC_ _N _ U_NACE AREA

OR IN CLOS[T W_IH WAIER HLA1FR

so _N

100 So

B. All Air From Outdoors: If confined space doesn't adjoin an unconfined space

(defined in EXAMPLE 1) then air must be provided from

OUTLET AIR

o-=

PNLEI AIR

*Openings for inlet or outlet air should not be made into attic area if attic is equipped with a thermostat controlled power vent.

FREE AREA IN SQ. INCHES

EACH OPENING (FURNACE ONLY)

BASED ON ONE SQ. INCH PER 4000 BTUH

Req'd Number of Holes

Furnace

Btuh/Input

30,000 35,000 40,000 45,000 50,000 60,000

Sq. Inch

of Opening

7.5

8.75

10.0

11.25

12.5

15.0

Sill or Header Plates

1V=" 2" 3"

7 4 8 5

9 5 10 6 11 6

13 8

3 3 3 4

--9--

Recessed Mount Installation

NOTE: Model Series 25096 and 35096. The maximum recess

depth, from rear of furnace forward is 41/=''.

FIND THE STUDS AND CEILING JOISTS Use astud Iocatoror smallfinishing nails. Repeatedly drive

and remove a nail into the wall inthe area of the stud until

it is located. Then find the inside edge of the stud. Leave

the nail at this location. The other stud should be about 141/2inches from the one

found. Drive finishing nails on the insideof this stud. Drew wall cut outto requiredsize as shown in Fig. 8. Ifwall studs

are not on 16 inch centers see "Close Off Stud Space." CUT WALL OPENING (See Caution on page 6)

All models: Cut wall opening 14-3/8 incheswide and 66-1/8

inches high measured from top of floor plate. See Fig. 8. All corners must be square.

INSTALLATION OF REAR OUTLET REGISTER (If Used) The optional rear outlet register 6901 can be installed

when furnace is recessed. In new construction, install the

HEADER PLATE AND GAS SUPPLY OPENINGS

rear outlet plasterground at the same time you install the header plate. For existing construction, make necessary

cutout and install the plasterground just before you install the furnace. See instructions packed with kit and Fig. 8.

Do notallow wall finish material to projectintothe furnace recess.

Do not installrear outlet registerwhere grille may be block- ed by door swing, curtains or any other obstruction.

GAS SUPPLY OPENING A hole mustbe drilled for the gas line. See Fig. 8 for alter-

nate gas line openings.

Decide whether the gas line witl come through the floor or wall.

Drill a 11/2 inch hole in wall or floor (Fig. 8) as needed. CLOSE OFF STUD SPACE (If Required)

If studs are not on 16 inch centers, cut the hole for the

furnace next to an existingstud and frame inthe other side

using a 2x4 and spacer blocks as required. See Fig. 9, page 11.

115V. OUTLET FOR

TOP

BOTTOM

HEADER NAILING

FLANGE

MODELS

2509611 2509612

2509621 2509622

AND

3509611 3509612 3509621 3509622

ALTERNATE GAS

62V4

OF HEADER PLASTERGROUND

OPTIONAL REAR REGISTER

PLASTER-

TO TOP

GROUND

NAIL

FLANGE

LOCATION

PLATE

FINtSHEO

FLOOR

--10--

Recessed Mount Installation (Con't)

CLOSE OFF STUD SPACE

PLA'flE

I_- EXISllNG STUD

I]I

NEW STUD

III

_S_NG S'PJD -_

•.-- 14--3/8"

[

FLOOR

_A_

[ I I BLOCKS

III

CUT PLATE OPENING (RECESSED VENTING) Cut away the ceiling plate between the studs where the

furnace is to be installed. Work from the top in the attic. If there is no access to the top, remove the wall covering

between the two wall studs,all the way to the ceiling. Work through this opening.

Cut out the entire plate so the plate edges will be even with the inner face of the 2x4 studs (Fig. 10).

INSTALL VENT BASE PLATE (HOLD-DOWN PLATE) Position base plate on top of header plate and fasten with

screws. Note: These items are included in Vent Kit 9901.

HEADER PLATE (VENT SUPPORT) Measure up 621/4 inches from the top offloor plate. Place

a mark on each stud at this distance. See Fig. 8, page 10. Place the header plate between the studs with the lower

edges even with marks on the studs. Make sure header

plate is level.

All models: Locate rear edge of nailing tabs at back of 2x4 stud which will center the vent collar in the wall. Nail

header plate to studs. See Fig. 8, page 10.

INSTALL CEILING PLATE SPACER (RECESSED MOUNT) Refer to Fig. 10.

Two ceiling plate spacers are in the B/W Vent Kit. They must be fastened along each long edge ofthe ceiling hole to hold the oval vent pipe in the center of the hole.

Nail the ceiling plate spacers either across or inbetween the cut out section ofceiling plate. If nailed between, end

must be bent at 90 degrees.

Ceiling plate spacers preserve structural strength and posi- tion oval vent pipe in the center of the cut out opening.

No electric power is required unless furnace is equipped

with an optional blower. Do not connect 115V service line to the gas control valve or wall thermostat.

ELECTRICAL OUTLET (Optional) If youare installingoptional bloweraccessory with the fur-

nace, rough-in a 115V electrical outlet as shownin Fig. 11.

CEILING PLATE SPACERS

RECESSED MOUNT

OPTIONAL ELECTRICAL OUTLET

BLOWER AGCT

62V4 ,

14 3/8

CEILING

PLATE SPACERS NAILED IN BE'nNEEN CEILING PLATES OR ACROSS FACE IF

ACCESSIBLE

--11 m

Surface Mount Installation

The use ofoptional Free Standing Kit No. 4901 allows fur- nace to be mounted on the surface of a wall. See detailed

instructions packed with kit.

Vent Installation

The vent installation must comply with all local codes and ordinances. If in doubt, consult your local codes or

inspector.

The furnace vent must be directed to the outdoors so that

harmful combustion gasses will not collect inside the building.

This furnace must not be connected to a chimney flue serving a separate solid-fuel burning appliance.

NOTE:

U.L. listedB/W Vent Kit9901, You must provide other items, not contained inkit, necessary tocomplete your specific venting situation through the roof. Refer to

typical venting system shown in Fig. 12.

WARNING

This product is design certified by A.G.A./C.G.A. to be in-

stalled with a U.L. listed type "B" approved vent and type "B/W" approved vent. See Fig. 12. Older styleterra-cotta,

transite, clay, concrete or masonary type vent pipe can- not be used with this appliance. This older type vent pipe

will not heat fast enough to establish a draft, which will result in improper venting of combustion products. Con-

sequently, this could cause the vent safety control system to shut down the furnace.

Vent Installation (Con't)

Type B/W gas vent shall extend from the header plate of the vented wall furnace to a point above the highest

ceiling plate within a stud space through which the vent passes, without any offsets or crossovers therein. After a type B/W gas vent passes through the highest ceiling plate within a stud space above the furnace which it serves, the vent system may be completed with a type B gas vent, of the same manufacturer (do not mix brands ofpipe), andoffsetsor breakoversshall not be greaterthan 45 degrees from vertical. Refer to (UNIFORM MECHANICAL CODE).

Install oval to round adapter. Complete the piping exten- ding it through the roof. Use a 4 inch round double wall (Type B) vent pipe, roofflashing, storm collar,and vent top as shown. The vent cap mustbe at least 2feet higherthan any pointthat is within 10feet horizontally ofthe vent cap.

There must be at least 1 inch clearance between the vent

pipe and any combustible material.

TYPICAL VENT INSTALLATION

"dYQtTCAP MUST BE MINIMUM 2 FEET HIGHER 1HAN ANY POINT WI1HIN 10 FEET

0F '4ENT CAP

HEIGHTFROMHEADER PLATETOVENTCAPTOP

MUSTBE S F£_ MINIMUM

1 INCHMIH.CLEARANCETOCOMBUSllBLES

_,= USTE_ 4." ROUNDB VISIT

$ OVALTOROUNDADAPTER

CAP

STORM

ROOF

IMPORTANT

Area above header within the stud space MUST be

kept clear of any attic insulation to allow the free cir- culation of air around oval vent piping. In some areas the building code requires the use of an attic shield.

NOTE

The B/W vent must extend through the ceiling and roof

terminating at least 12 feet above the finished floor on

which the furnace rests.

Firstvent pipe offset (if required) must not be any closer

than 2'-0" from header plate.

INSTALL FURNACE VENT (RECESSED MOUNT)

Lower a4 foot length of oval, double wall vent pipe through

the place spacers to the hold-down plate.

Push the vent pipe intothe hold-down plate until it is com- pletely seated. (Hold-down cleat will engage the groove

in the vent pipe.)

COMPLETE THE VENTING

Refer to Fig. 12.

$ OVALB/_V VENT (DOIJBLE WALL)

$ PLATESPACER-

(RECESSEDMOUNT)

2 R£Q'D

* eASE PLATE (HOLD-DOWN) OR

STARTERPLATE SCREWEDDOWN TO HEADERPLAIT-,,

NOTE

HEADER PLATE AND GASKETS PRO_/1D£D WITH FURNACE

TAKE CARE NO'r TO DISllJRB _ GLUED TO

OF HEADER. _ MA'r_41AL

MUST NOT BLOCK FLUE Ex'nsNsICH \

* CONTAINED IN OVAL B/W

(STARTER) VENT KIT NO. 9901

"° NOT PROVIDED WITH KITS

AVAILABLE

50,000 BTUH FURNACE AND HEADER NOT SHOWN.

NOTE: FLUE COLLAR GASKET, NOT REQUIRED ON MODELS 5009611,

5009612, 5009621 & 5009622

--12--

+ 28 hidden pages

Williams 3509612, 2509612, 2509622 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual