INSTALLATION
Continued
If Using Mantel
You must have noncombustible material(s) above the fireplace opening. Noncombustible 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. Noncombustible material must extend at least 8 inches up (for all models). If noncombustible material is less than 12", you must install the fireplace hood accessory (24" model only). Even if noncombustible material is more than 12", you may need the hood accessory to deflect heat away from your mantel shelf. See Figure 5 (see page 9), Figure 6 and Figure 7 (see page 11) for minimum clearances.
IMPORTANT: If you cannot meet these minimum clearances, you must operate heater with chim- ney flue damper open. Go to Installing Damper Clamp Accessory for Vented Operation, page 12.
MANTEL CLEARANCES
In addition to meeting noncombustible 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 fireplace opening, a hood is not required (see Figure 6).
Determining Minimum Mantel Clearance when Using a Hood
If minimum clearances in Figure 6 are not met, you must have a hood. When using a hood there are still certain minimum mantel clearances re- quired. Follow minimum clearances shown in Fig- ure 7, page 11, when using a hood.
NOTICE: Surface temperatures of adjacent walls and mantels become hot during operation. Walls and mantels above the fire- boxmaybecomehottothetouch. If installed properly, these tem- peratures meet the requirement of the national product standard. Follow all minimum clearances shown in this manual.
NOTICE: If your installation does not meet the minimum clear- ances shown, you must do one of the following:
•operate the logs only with the flue damper open
•raise the mantel to an accept- able height
•remove the mantel
10"
8"
6"
2 1/2"
Minimum Non- |
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| (A) | |
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Combustible | ||||
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Material | 12" | |||
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| 8" | |
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Mantel Shelf
18" |
| 20" | 22" |
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8" |
| 14" | 17" |
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Underside of
Mantel Shelf
All minimum distances are in inches
Log Set
24" 
24" Model
20" 
18" Model
Top of Fireplace
Opening
Minimum Non- | Distances to |
Combustible | Underside of |
Material Height | Mantel |
Figure 6 - Minimum Mantel Clearances Without Using Hood
10 | www.desatech.com |
