Desa Tech CGD3930PT, CGD3924PT installation manual Installing, Continued

INSTALLING

Continued

Minimum Non-Combustible Material Clearances (Continued)

If Using Mantel

You must have non-combustible material(s) above the fireplace opening. Non- combustible materials (such as slate, marble, tile, etc.) must be at least 1/2 inch

thick. With sheet metal, you must have non-combustible material behind it. Non- combustible material must extend at least 8" up (for all models). If non-combus- tible material is less than 12", you must install the fireplace hood accessory (24"

and 30" models only). Even if non-combustible material is more than 12", you may need the hood accessory to deflect heat away from your mantel shelf. See chart below and Figures 6 and 7 for minimum clearances.

IMPORTANT." If you cannot meet these minimum clearances, you must operate heater with chimney flue damper open. Go to Installing Damper Clamp Acces- sory for Vented Operation, page 13.

Non-Combustible

Material Distance (A)

12" or more

Between 8" and 12"

Less than 8"

Requirements for

Safe Installation

Non-combustible material okay.

24" or 30" Models: Install fireplace hood accessory (GA6050 or GA6052, see Accessories, page 33). 18" Model: Non-combustible material okay.

Non-combustible material must be extended to at least 8". See Between 8" and 12", above. If you cannot extend material, you must operate heater with flue damper open.

Mantel Clearances

In addition to meeting	non-combustible			material clearances, you must also meet
required clearances between fireplace opening and mantel shelf. If you do not
meet the clearances listed below, you will need a hood.
Determining Minimum		Mantel	Clearance
If you meet minimum clearance between mantel shelf and top of f'weplace open-
ing, a hood is not required (see Figure 6).
								Mantel Shelf
				Mantel	Shelf			Underside of
								All minimum
		j m_						distances are
								in inches
MinimumNon-	_	i	(A)
Combustiblfl		,,						Log Set
Matedal		/	12"	20"	241,2•	271,2 •
							30" _	24"/30" Models
		#
		/	8"	14"	163/4 ,	181Q" 20" _		18" Model
		/
								Top of Fireplace
			_				/	Opening
		MinimumNon.			Distancesto
		Combustible			Underside of
		MaterialHeight			Mantel				i
		I
Figure 6. Minimum Mantel Clearances Without Using Hood									_l_ I
,,,k								Continued