Desa VFRMV18PA, VFRMV18NA, VFRMV24NA, VFRMV24PA installation manual Area of Various Standard

INSTALLATION

Continued

INSTALLING DAMPER CLAMP ACCESSORY FOR VENTED OPERATION

Note: When used as a vented decorative, appliance must be installed only in a solid-fuel burning fireplace with a working flue and constructed of noncombustible material.

If your heater is a non-thermostatically-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 above apply to you, you must permanently open chimney flue damper. You must install the damper clamp accessory (to order, see Accessories, page 26). This will insure vented operation (see Figure 10). The damper clamp will keep damper open. Installation instructions are included with clamp accessory.

Damper	Damper
Clamp

Damper

Damper

Clamp

Damper

Masonry Manufactured

FireplaceFireplace

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.
Area of Various Standard
Round Flues
Diameter (ins.)	Area (sq. ins.)
5"	20 sq. inches
6"	29 sq. inches
7"	39 sq. inches
8"	51 sq. inches

Chimney	Minimum Permanent
Height (ft.)	Flue Opening (sq. ins.)
6' to 15'	39 sq. inches
15' to 30'	29 sq. inches
INSTALLING HEATER ASSEMBLY
WARNING: If installing in a
sunken fireplace, special care
is needed. You must raise the
fireplace floor to allow access
to heater control panel. This
will insure adequate air flow and
guard against sooting. Raise
fireplace floor with noncombus-
tible material. Make sure material
is secure.
CAUTION: Do not pick up
heater assembly by logs. This
could damage unit. Only handle
assembly by grates.
IMPORTANT: Make sure the heater burners are
level. If heater is not level, heater will not work
properly.
Installation Items Needed

•control cover kit (provided with heater)

•approved flexible gas hose and fittings (pro- vided with heater) (if allowed by local codes)

•sealant (resistant to propane/LP gas, not provided)

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