Desa H18NA Owner's Operation And Installation Manual page 11

Unvented (vent-free) gas log heater
Table of Contents

Advertisement

FLOOR CLEARANCES
A. If installing appliance on floor level, you
must maintain the minimum distance of
14" to combustibles (see Figure 7).
B. If combustible materials are less than 14"
to fireplace, you must install appliance at
least 5" above combustible flooring (see
Figure 8).
Figure 7 - Minimum Fireplace Clearances
If Installed at Floor Level
Figure 8 - Minimum Fireplace Clearances
Above Combustible Flooring
INSTALLING DAMPER CLAMP
ACCESSORY FOR VENTED
OPERATION
Note: When used as a vented heater, ap-
pliance must be installed only in a solid-fuel
burning fireplace with a working flue and
constructed of noncombustible material.
You may use this heater as a vented product.
There are three reasons for operating your
heater in the vented mode.
1. The fireplace does not meet the clear-
ance to combustibles requirements for
vent-free operation.
2. State or local codes do not permit vent-
free operation.
3. You prefer vented operation.
122859-01D
INSTALLATION
Continued
Combustible
Material
14"
Min.
Noncombustible Material
Hearth
Combustible
Material
5"
Min.
www.desatech.com
If reasons number 1 or 2 apply to you, you
must permanently open chimney flue damper.
You must install the damper clamp accessory
(to order, see Accessories, page 25). This
will insure vented operation (see Figure 9).
The damper clamp will keep damper open.
Installation instructions are included with
clamp accessory.
See chart below for minimum permanent flue
opening you must provide. Attach damper
clamp so the minimum permanent flue open-
ing will be maintained at all times.
Chimney
Height
6' to 15'
15' to 30'
Area of Various Standard Round Flues
Diameter
5"
6"
7"
8"
Damper
Damper
Clamp
Damper
Masonry Fireplace
Figure 9 - Attaching Damper Clamp
Minimum Permanent
Flue Opening
39 sq. inches
29 sq. inches
Area
20 sq. inches
29 sq. inches
39 sq. inches
51 sq. inches
Damper
Manufactured
Fireplace
11

Advertisement

Table of Contents
loading

This manual is also suitable for:

H18paVsb18naVsb18paVsb24naVsb24pa

Table of Contents