Vanguard VYD18NRB Owner's Operation page 12

FLOOR CLEARANCES
A. If installing appliance on the floor level,
you must maintain the minimum distance
of 14" to combustibles (see Figure 8).
B. If combustible materials are less than 14"
to the fireplace, you must install appliance
at least 5" above the combustible flooring
(see Figure 9).
Figure 8 - Minimum Fireplace Clearances
If Installed at Floor Level
Figure 9 - 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 con-
structed of noncombustible material.
For Massachusetts Residents Only: Instal-
lation of this vented gas log set in the Com-
monwealth of Massachusetts requires the
damper be permanently removed or welded
in the fully open position.
If your heater is a manually-controlled model,
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 clearance
to combustibles requirements for vent-free
operation.
12
INSTALLATION
Continued
Combustible
Material
14"
Min.
Noncombustible Material
Noncombustible Material
Hearth
Combustible
Material
5"
Min.
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2. State or local codes do not permit vent-
free operation.
3. You prefer vented operation.
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
31). This will insure vented operation (see Fig-
ure 10). The damper clamp will keep damper
open. Installation instructions are included
with clamp accessory.
See chart for minimum permanent flue open-
ing you must provide. Attach damper clamp so
the minimum permanent flue opening will be
maintained at all times.
Area of Various Standard
Round Flues
Diameter
5"
6"
7"
8"
Chimney Minimum Permanent
Height
6' to 15'
15' to 30'
Damper
Clamp
Damper
Clamp
Damper
Masonry Fireplace
Figure 10 - Attaching Damper Clamp
Area
20 sq. in.
29 sq. in.
39 sq. in.
51 sq. in.
Flue Opening
39 sq. in.
29 sq. in.
Damper
Damper
Manufactured Fireplace
113093-01J