Unvented natural gas log heater, Installation, Continued – Desa CGG2618N User Manual

Page 10

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10

UNVENTED NATURAL GAS LOG HEATER

103424

INSTALLING HEATER BASE
ASSEMBLY

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 burn-
ers. This could damage heater.
Only handle base assembly by
grates.

IMPORTANT:

Make sure the heater burn-

ers are level. If heater is not level, heater will
not work properly. For thermostat models,
avoid damage to thermostat bulb. Avoid
nicks or sharp bends in thermostat bulb
wire. Keep thermostat bulb in mounting
bracket.

Installation Items Needed

• hardware package (provided with heater)

• approved flexible gas hose (not provided)

(if allowed by local codes)

• sealant (resistant to propane/LP gas, not

provided)

• electric drill with 3/16" masonry drill bit

1.

Apply pipe joint sealant lightly to male
threads of gas connector. Install into
regulator. Connect approved flexible
gas hose to gas regulator of heater (see
Figure 11, page 11).

IMPORTANT:

Hold gas regulator with

wrench when connecting gas fittings.

2.

Position heater base assembly in fire-
place.

3.

Mark screw locations through holes in
front of base. If installing in a brick-
bottom fireplace, mark screw locations
in mortar joint of bricks.

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.

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 noncombustible material.

If your heater is a manually-controlled
model, you may use this heater as a vented
product. There are three reasons for operat-
ing 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
22). This will insure vented operation (see
Figure 10). The damper clamp will keep
damper open. Installation instructions are
included with clamp accessory.

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 (in.)

Area (sq. in.)

5"

20 sq. inches

6"

29 sq. inches

7"

39 sq. inches

8"

51 sq. inches

Chimney

Minimum Permanent

Height (ft.)

Flue Opening (sq. in.)

6' to 15'

39 sq. inches

15' to 30'

29 sq.inches

Damper

Damper
Clamp

Damper
Clamp

Damper

Damper

Manufactured Fireplace

Masonry Fireplace

Figure 10 - Attaching Damper Clamp

INSTALLATION

Continued

CAUTION: Do not remove the

metal data plates attached to the
heater base assembly. The data
plates contain important warranty
information.

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