Desa Tech RFN28TD AIR for Combustion and Ventilation, Providing Adequate Ventilation

OWNER’S MANUAL

ASSEMBLY

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Assembling and Attaching Brass Trim

1.Remove packaging from remaining three pieces of brass trim.

2.Locate four brass screws, two adjust- ing plates with set screws, and two shims in the hardware packet.

3.Align shim under adjusting plate as shown in Figure 6.

4.Slide one end of adjusting plate/shim in slot on mitered edge of top brass trim (see Figure 6).

5.Slide other end of adjusting plate/shim in slot on mitered edge of side brass trim (see Figure 6).

6.While firmly holding edges of brass trim together, tighten both set screws on the adjusting plate with slotted screwdriver.

7.Repeat steps 1 through 6 for other side.

8.Place the assembled trim on front of heater cabinet. Attach on top and sides with four brass screws included in hard- ware package (see Figure 7).

9.Reattach front panel to heater if you are going to mount the heater to the base. Do not reattach front panel at this time if you are going to mount heater to wall.

	Set Screws		Top
Side Brass
	Adjusting		Brass
Trim			Trim
	Plate
	Shim	Slot
Slot	Mitered Edge

Figure 6 - Assembling Brass Trim

Screws

Assembled

Brass Trim

Figure 7 - Attaching Brass Trim to Heater

AIR FOR COMBUSTION AND VENTILATION

WARNING: This heater shall not be installed in a confined space 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 is excerpts from National Fuel Gas Code. NFPA 54/ANSI Z223.1, Section 5.3, Air for Combustion and Venti- lation.

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 5 through 7 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 7.

If your home does not meet all of the three criteria above, proceed to Deter- mining Fresh-Air Flow for Heater Lo- cation, page 6.

Confined and Unconfined Space

The National Fuel Gas Code (ANSI Z223.1, 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 unconfining 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.

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