Desa CGEFP33NR installation manual Product Features, AIR for Combustion and Ventilation

UNVENTED 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 realistic flames. When used without the blower in “manual ignition” mode, the fireplace requires no electricity to operate, making it ideal for emergency backup heat.

SAFETY DEVICE

This fireplace has a pilot with an Oxygen Depletion Sensing (ODS) safety shutoff sys- tem. The ODS/pilot is a required feature for vent-free room heaters. The ODS system shuts off the fireplace if there is not enough fresh air.

PIEZO IGNITION SYSTEM

This fireplace has a piezo ignitor. This sys- tem requires no matches, batteries, or other sources to light fireplace. The piezo ignition may be used to light the pilot and burner in the event of an electrical power outage (see Operating Fireplace, pages 20 through 22).

BLOWER ASSEMBLY

(GA3750 and GA3650T Series)

This fireplace accepts an optional blower assembly. The GA3750 blower has a manual variable control. The GA3650T blower op- erates thermostatically. The blower circu- lates heated air from the fireplace into the room. Use of blower is optional. See Acces- sories, page 34.

WIRELESS REMOTE

CONTROL

This fireplace features an infra-red wireless remote control. This control system can be used to automatically light the pilot and adjust the burner flame height at the push of a button.

WIRED WALL-MOUNTED REMOTE CONTROL

This fireplace features a two-button wall switch and wall plate with glowing LED’s. The wall switch performs the same func- tions as the wireless hand-held remote con- trol with the added feature of LED’s for visual feedback of operation and status.

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 ven- tilation air. Read the following in- structions to insure proper fresh air for this and other fuel-burning appliances 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.

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.

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 (6 x 10-11kg per pa-sec-m2) or less with open- ings 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 window and door frames, be- tween sole plates and floors, be- tween wall-ceiling joints, be- tween wall panels, at penetra- tions for plumbing, 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 Deter- mining Fresh-Air Flow for Fireplace Location on page 5.

Confined Space and Unconfined Space

The National Fuel Gas Code, ANS Z223.1 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 in- stalled in that space. Rooms communicating directly with the space in which the appli- ances are installed*, 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 of 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.

For more information, visit www.desatech.com 4 107569