Area of Various Standard

10

INSTALLATION

Installing Damper Clamp Accessory for Vented Operation Installing Heater Base Assembly

INSTALLATION

Continued

INSTALLING DAMPER CLAMP ACCESSORY FOR VENTED OPERATION

Note: When used as a vented heater, 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 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 re- quirements 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 28). 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 (ins.)

Area (sq. ins.)

 

 

5"

20 sq. inches

6"

29 sq. inches

7"

39 sq. inches

8"

51 sq. inches

 

 

INSTALLING HEATER BASE ASSEMBLY

INSTALLING HEATER BASE ASSEMBLY WARNING: You must secure this heater to fire- place floor. If not, heater will move when you adjust controls. Moving heater may cause a gas leak or log misplacement.

Installation Items Needed WARNING: If installing in a sunken fireplace, spe- cial 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 and con- trols being damaged. Raise fireplace floor with noncom- bustible material. Make sure material is secure.

Manual background CAUTION: Do not pick up heater base assembly by burners. This could damage heater. Only handle base assembly by grates.

IMPORTANT: Make sure the heater burners 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 until ready to mount base to floor. See Optional Positioning Of Thermostat Sensing Bulb, page 23.

Installation Items Needed

hardware package (provided with heater)

approved flexible gas hose and fittings (not provided) (if allowed by local codes)

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

electric drill with 3/16" drill bit (metal or masonry as applicable)

flathead screwdriver

Chimney

Minimum Permanent

Height (ft.)

Flue Opening (sq. ins.)

 

 

6' to 15'

39 sq. inches

15' to 30'

29 sq. inches

 

 

Damper Clamp

Damper Clamp

DamperDamper

Damper

Masonry Fireplace

Manufactured Fireplace

Figure 10 - Attaching Damper Clamp

• pipe wrench

1.Apply pipe joint sealant lightly to male threads of gas fitting (not provided). Connect approved flexible gas hose to gas regu- lator of heater (see Figure 11). IMPORTANT: Hold gas regula- tor with wrench when connecting flexible gas hose.

2.Locate two masonry screws in hardware package.

3.Place heater base in fireplace.

4.Place logs in their proper position on heater base (see Installing Logs, pages 13 and 14).

Manual background Heater Gas Regulator

Flexible Gas Hose (if

Fitting allowed by local codes)

Figure 11 - Attaching Flexible Gas Hose to Heater Gas Regulator

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Desa LSL3124N Installing Heater Base Assembly, Area of Various Standard Round Flues, Installation Items Needed, Continued