Williams 4003532 User Manual

3

201842

Install and use furnace with care. Follow all
local codes. In the absence of local codes, use
the latest edition of the following:

• National Fuel Gas Code ANS Z223.1,

also known as NFPA 54 * (USA)

• CAN/CGA-B149[.1 or .2] Installation

Codes** (Canada).

*Available from:

American National Standards Institute, Inc.

1430 Broadway

New York, NY  10018

National Fire Protection Association, Inc.

Batterymarch Park

Quincy, MA  02269

**Available from:

Standards Council of Canada

350 Sparks Street

Ottawa, Ontario  K1R 7S8

This furnace must be grounded when in-
stalled. Follow all local codes. In the ab-
sence of local codes, refer to the National
Electrical Code ANS/NFPA No. 70 (U.S.A.)
or  CSA C22.1 Canadian Electrical Code,
Part I (Canada).

The installation must conform with local
codes, in the absence of local codes, with the
National Fuel Gas Code, ANS Z223.1/Ca-
nadian Installation Code, CAN/CGA B149.

When installing furnace in a manufactured
(mobile) home, follow the Manufactured
Home Construction and Safety Standard,
Title 24CFR, Part 3280 (formerly the Fed-
eral Standard for Mobile Home Construc-
tion and Safety, Title 24, part 280; 1975).
When such a standard is not applicable,
follow the Standard for Manufactured Home
Installations, 1982 (Manufactured Home
Sites, Communities, and Set-Ups), ANS
A225.1/NFPA 501A.

In Canada, install furnace in accordance with
Standard CSA Z240.4 - Gas Equipped Recre-
ational Vehicles and Mobile Housing and
any applicable local codes and regulations.

Appliance input ratings are based on sea
level operation and need not be changed for
operation up to 2,000 feet elevation. For
operation at elevations above 2,000 feet,
manufactured to specified deration condi-
tions for Canada and the United States.

1.

Remove furnace from carton.

2.

Remove all protective packaging ap-
plied to furnace for shipment.

3.

Remove the following items from carton:
• Hardware package containing four

large screws, two small screws, and
thermostat mounting plate

• Hardware package (thermostat and

two screws)

• Equipment shutoff valve

If any of these items are missing,
promptly inform dealer where you
bought furnace.

4.

Check furnace for any shipping damage.
If furnace is damaged, promptly inform
dealer where you bought furnace.

This furnace has an electronic ignitor. There
is no standing pilot. No matches or batteries
are required.

The thermostat is temperature sensitive. It
automatically turns the furnace on and off.
This results in the greatest heating comfort.
This can also result in lower gas bills.

The limit switch shuts off the gas to the main
burner if the furnace becomes too hot to
operate safely.

*Rated Heating Input (BTU/Hr)

25,000

40,000

Thermal Output Capacity

(average loss calculation)

18,750 Btu/Hr

30,000 Btu/Hr

Type Gas

Natural Only

Natural Only

Ignition

Hot Surface Ignitor

Hot Surface Ignitor

Operating Amps

1.5

2

Volts/Cycles

120/60

120/60

Main Burner

1

2

Pressure Regulator Setting

3.5" W.C.

3.5" W.C.

Inlet Connection

3/8 NPT

3/8 NPT

Inlet Gas Pressure (in. of water)*

Maximum

7"

7"

Minimum

5"

5"

Dimensions, Inches (H x W x D)

Furnace

15 

3

/

32

 x 16 

1

/

8

 x 23 

5

/

8

15 

3

/

32

 x 21 

3

/

4

 x 23 

5

/

8

Weight (pounds)

Furnace

53

71

Shipping

65

98

* For purposes of input adjustment.