Vanguard VYD18NRB, Owner'S Operation, Page: 12 / 36

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113093-01J 12
INSTALLATION
Continued
14"
Min.
Combustible
Material
Noncombustible Material
Figure 8 - Minimum Fireplace Clearances
If Installed at Floor Level
Figure 9 - Minimum Fireplace Clearances
Above Combustible Flooring
Noncombustible Material
Hearth
5"
Min.
Combustible
Material
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).
Chimney
Height
Minimum Permanent
Flue Opening
6' to 15' 39 sq. in.
15' to 30' 29 sq. in.
Figure 10 - Attaching Damper Clamp
Damper
Clamp
Manufactured Fireplace
Masonry Fireplace
Damper
Clamp
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.
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 Area
5" 20 sq. in.
6" 29 sq. in.
7" 39 sq. in.
8" 51 sq. in.
Damper
Damper
Damper