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HEARTH EXTENSION
A hearth extension projecting a minimum of 20" in front of and a
minimum of 12" beyond each side of the fireplace opening is
required to protect combustible floor construction in front of the
fireplace. Use a layer of noncombustible inorganic material having
a thermal conductivity of K=0.64 BTU IN/FT. SQ. HR F (or less) at
1" thick. Example of determining hearth extension equivalent. If the
material selected has a K Factor of 0.25, such as glass fiber, then the
following formula would apply 0.25/0.64 x 1"=. 39" thick. This must
be covered by any noncombustible material such as tile, slate, brick,
concrete, metal, glass, marble, stone, etc. Fasten the hearth extension
to the floor to prevent shifting and seal the gap between the fireplace
frame and hearth extension with a noncombustible material (see
Figures 15 and 16).
WARNING: HEARTH EXTENSION IS TO BE IN-
STALLED ONLY AS ILLUSTRATED.
H
HEARTH
SIONS
EXTENSIONS
STANDARD
MODEL
HEARTH
V42EC
RAISED
NO
HEARTH
f i r e - p a r t s . c o m
ELEVATED
FIREPLACE
Figure 15
HEARTH
STANDARD
EXTENSIONS
HEARTH
MODEL
V42E
RAISED
HEARTH
ELEVATED
FIREPLACE
Figure 16
DAMPER OPERATION
The damper handle to open and close the damper blade is located inside
the firebox at the center towards the back wall. Pushing the handle back
into the keyway slot will free the damper blade to automatically open.
To close, reach in and push the handle back into the keyhole slot then pull
down and forward to lock it in place (see Figure 17).
DAMPER
WEIGHT
TO CLOSE
DAMPER
Figure 17
55510
SEAL GAP
EMBER PROTECTOR
DO NOT BLOCK
INTAKE GRILL
SEAL GAP
EMBER PROTECTOR
SEAL GAP
EMBER PROTECTOR
DO NOT BLOCK
INTAKE GRILL
SEAL GAP
EMBER PROTECTOR
TO OPEN
DAMPER
COMBUSTIBLE AIR KIT (MODEL VAK4E)
An air kit is available for use as an optional accessory. The outside
air vent can be installed through an outside wall or a ventilated crawl
space. Attach flex tube (CLASS 1) to air vent and air inlet tube. Seal
with duct tape (see Figure 18). For air inlet tube installation see
Figure 19.
WARNING: AIR INLET DUCTS ARE NOT TO TERMI-
NATE IN ATTIC SPACE.
Avoid installing outside air eyebrow in areas where inlet opening
may be blocked by snow, bushes or other obstacles. Maximum
height of air inlet above platform of fireplace is within 3 feet below
the termination flue gas outlet.
SEAL WITH
DUCT TAPE
AIR INLET
TUBE
0" MIN.
AIR VENT
FLEX DUCT
OUTSIDE WALL
Figure 18
SHEET METAL SCREW
REMOVE KNOCKOUT
FIREPLACE
TAB IN NOTCH
Figure 19
AIR KIT OPERATION
The damper rod for the air kit is located inside the face opening,
above the upper left top of the rear firebrick. Push the rod up to open
the air intake, and down to close it (see Figure 20).
REAR FIREBRICK
Figure 20
7
0" MIN.
AIR VENT
FLEX TUBE
OUTSIDE WALL
SEAL WITH
DUCT TAPE
AIR INLET
TUBE
AIR INLET TUBE
AIR KIT DAMPER ROD
OPEN POSITION
CLOSED POSITION
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