Introduction - Williams 0656542.9 Owner's Manual

Introduction

Please read our instructions before you install and use your heater. This will help you obtain the full value from this heater. It could
help you avoid needless service costs, if the answer to the problem is found within this instruction manual. If the answer is not found,
call our Customer Service Department at (909) 825-0993 before returning the heater to your supplier.
Today's homes are built more energy efficient than ever. New materials, increased insulation and new construction methods help
reduce heat loss in homes. Homeowners weather strip and caulk around windows and doors to keep the cold air out and the warm air
in. During heating months, homeowners want their homes as airtight as possible. While it is good to make your home energy efficient,
your home needs to breathe. Fresh air must enter your home. All fuel-burning appliances need fresh air for proper combustion and
ventilation.
Basic Description
Unvented heaters are shipped ready to install. No electric power
is needed for the heater except when the optional accessory
blower is used. Then, a standard three prong receptacle
(electrical outlet) is needed near the heater.
Always consult your local heating or plumbing inspector, building
department or gas utility company regarding regulations, codes or
ordinances which apply to the installation of an unvented heater.
The heater contains a single, multi-slot gas burner.
Combustion air is drawn to the heater from the room in which it is
installed. It must receive enough air to enable it to operate
properly. See page 7 of this instruction manual for more
information.
Convection causes room air to circulate from the floor upward
along the front, back and sides of the heater, and then back to the
room.
The heater cabinet is built of heavy-gauge steel treated for
corrosion resistance and has an enamel paint finish. The heater
controls are located on the top of the cabinet. All models are
equipped with AGA/CGA listed gas valves and pilots.
Basic Materials Needed
Pipe and fittings to make connections to heater.
Black iron gas pipe and fittings - 1/2".
Pipe Joint Compound resistant to L.P. gases.
Basic Tools Needed
Pipe Wrenches
Screwdriver
6 ft. folding rule or tape
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 "National Fuel Gas Code", also known as NFPA 54. In Canada: CAN/CGAB149.
Obtain from the American National Standard Institute, Inc., 1430 Broadway, New York NY 10018.
Piezo Ignition System
This unit has a piezo igniter. This system requires no matches,
batteries, or other sources to light the heater.
Thermostatic Heat Control
Thermostat models have a thermostat sensing bulb and a control
valve. This results in the greatest heat comfort. This can also
result in lower gas bills.
Safety Device
This unit has a pilot with an Oxygen Depletion Sensor shutoff
system (ODS). The ODS/pilot is a required feature for unvented
room heaters. The ODS/pilot shuts off the heater if there is not
enough fresh air. When the normal oxygen content
(approximately 21 %) is reduced to 18%, the pilot and main
burner will turn off and cannot be relighted. When the pilot flame
is extinguished by wind or interruption of gas supply, it will also
turn off. Relighting is possible in this condition.
Electrical supplies only required if accessory blower is being
installed.
Electrical wiring supplies as needed.
Minimum wire size is #14 gauge copper.
Level
Pipe cutting and threading tools
Gloves and safety glasses
Introduction – 5
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