Desa CGFP28NT installation manual Product Features, AIR for Combustion and Ventilation

CGFP28N and CGFP28NT

UNVENTED (VENT-FREE) NATURAL GAS FIREPLACE

PRODUCT

FEATURES

OPERATION

This vent-free fireplace is clean burning. It requires no outside venting. There is no heat loss out a vent or up a chimney. Heat is generated by both realistic flames and glow- ing embers. The fireplace requires no electric- ity making it ideal for emergency backup heat.

SAFETY FEATURES

This fireplace has a pilot with an Oxygen Depletion Sensor Shutoff System (ODS). The ODS/pilot is a required feature for vent- free room heaters. The ODS system protects against oxygen depletion and any interrup- tion in the fuel supply. If either occurs, the ODS shuts off gas flow to the burner, turn- ing the fireplace off. An internal regulator controls fluctuations in your gas pressure.

PIEZO IGNITION SYSTEM

This fireplace has a piezo ignitor. This sys- tem requires no matches, batteries, or other sources to light fireplace.

AIR FOR COMBUSTION AND VENTILATION

WARNING: This heater shall not be installed in a confined space or unusually tight construction unless provisions are provided for adequate combustion and ventila- tion air. Read the following instruc- tions to insure proper fresh air for this and other fuel-burning appli- ances in your home.

Today’s homes are built more energy effi- cient than ever. New materials, increased insulation, and new construction methods help reduce heat loss in homes. Home owners weather strip and caulk around windows and doors to keep the cold air out and the warm air in. During heating months, home owners 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 com- bustion and ventilation.

Unusually tight construction is de- fined as construction where:

a. walls and ceilings exposed to the outside atmosphere have a con- tinuous water vapor retarder with a rating of one perm (6x10-11kg per pa-sec-m2) or less with openings gasketed or sealed and

b. weather stripping has been added on openable windows and doors and

c.caulking or sealants are applied to areas such as joints around win- dow and door frames, between sole plates and floors, between wall-ceiling joints, between wall panels, at penetrations for plumb- ing, electrical, and gas lines, and at other openings.

If your home meets all of the three criteria above, you must provide ad- ditional fresh air. See Ventilation Air From Outdoors, page 6.

If your home does not meet all of the three criteria above, proceed to De- termining Fresh-Air Flow For Fire- place Location, page 5.

THERMOSTAT CONTROL (CGFP28NT)

These fireplaces have a thermostat sensing bulb and a control valve. The thermostat controls the heat output and flame height. This maintains a consistent room tempera- ture. Even the lowest setting provides real- istic flames and glowing embers from two burners. Selecting higher comfort settings allows the fireplace to run longer, produc- ing greater heat output. At lower comfort settings, the fireplace will run less. This results in increased heating comfort. This can also result in lower gas bills. An op- tional thermostatically (GA3650T) or manu- ally (GA3750) controlled blower is avail- able (see Accessories, page 25).

VARIABLE MANUAL

CONTROL (CGFP28N)

These fireplaces have a variable manual con- trol valve which allows the user to choose the heat setting that best suits his needs. Any setting between low and high may be selected by simply turning the control knob. An op- tional manually controlled blower (GA3750) is available (see Accessories, page 25).

Exhaust fans, fireplaces, clothes dryers, and fuel burning appliances draw air from the house to operate. You must provide ad- equate fresh air for these appliances. This will insure proper venting of vented fuel- burning appliances.

PROVIDING ADEQUATE VENTILATION

The following are excerpts from National Fuel Gas Code. NFPA 54/ANS Z223.1, Sec- tion 5.3, Air for Combustion and Ventilation.

All spaces in homes fall into one of the three following ventilation classifications:

1.Unusually Tight Construction

2.Unconfined Space

3.Confined Space

The information on pages 4 through 6 will help you classify your space and provide adequate ventilation.

Unusually Tight Construction

The air that leaks around doors and win- dows may provide enough fresh air for combustion and ventilation. However, in buildings of unusually tight construction, you must provide additional fresh air.

Confined Space and Unconfined Space

The National Fuel Gas Code ANS Z2123.1, 1992 Section 5.3) defines a confined space as a space whose volume is less than 50 cubic feet per 1,000 Btu per hour (4.8 m3 per kw) of the aggregate input rating of all appliances installed in that space and an unconfined space as a space whose volume is not less than 50 cubic feet per 1,000 Btu per hour (4.8 m3 per kw) of the aggregate input rating of all appliances installed in that space. Rooms communicating directly with the space in which the appliances are in- stalled*, through openings not furnished with doors, are considered a part of the unconfined space.

This heater shall not be installed in a con- fined space or unusually tight construction unless provisions are provided for adequate combustion and ventilation air.

*Adjoining rooms are communicating only if there are doorless passageways or ventila- tion grills between them.

4 103413