Installing Damper Clamp Accessory For Vented Operation; Installing Heater Base Assembly - Vanguard UNVENTED (VENT-FREE) NATURAL GAS LOG HEATER Operating And Installation Manual

VANGUARD FLAME MAX
UNVENTED NATURAL GAS LOG HEATER
INSTALLATION
Continued
INSTALLING DAMPER
CLAMP ACCESSORY FOR
VENTED OPERATION
Note: When used as a vented heater, appli-
ance must be installed only in a solid-fuel
burning fireplace with a working flue and
constructed of non combustible material.
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 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
If reasons number 1 or 2 above 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 10). The damper clamp will keep
damper open. Installation instructions are
included with clamp accessory.
Damper
Clamp
Damper
Masonry Fireplace
Figure 10 - Attaching Damper Clamp
See chart below for minimum permanent
flue opening you must provide. Attach
damper clamp so the minimum permanent
flue opening will be maintained at all times.
Chimney
Height (ft.) Flue Opening (sq. ins.)
6' to 15'
15' to 30'
Area of Various Standard
Diameter (ins.)
Damper
Damper
Clamp
Manufactured Fireplace
®
Minimum Permanent
39 sq. inches
29 sq. inches
Round Flues
Area (sq. ins.)
5" 20 sq. inches
6" 29 sq. inches
7" 39 sq. inches
8" 51 sq. inches
Damper
10
INSTALLING HEATER BASE
ASSEMBLY
CAUTION: Do not remove the
metal Data Plates attached to the
heater base assembly. The Data
Plates contain important warranty
information.
WARNING: You must secure
this heater to fireplace floor. If
not, heater will move when you
adjust controls. Moving heater
may cause a gas leak.
WARNING: If installing in a
sunken fireplace, special care is
needed. You must raise the fire-
place floor to allow access to
heater control panel. This will in-
sure adequate air flow and guard
against sooting. Raise fireplace
floor with noncombustible mate-
rial. Make sure material is secure.
CAUTION: Do not pick up
heater base assembly by the
burner. This could damage
heater. Only handle base assem-
bly by grates.
IMPORTANT: Make sure the heater burner
is level. If heater is not level, heater will not
work properly.
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