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 24). 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.

Chimney

Minimum Permanent

Height (ft.)

Flue Opening (sq. ins.)

 

 

6' to 15'

39 sq. inches

15' to 30'

29 sq. inches

 

 

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

Damper

Damper

Clamp

 

 

Damper

Damper

Clamp

Masonry Fireplace

Manufactured Fireplace

Figure 10 - Attaching Damper Clamp

INSTALLING HEATER BASE ASSEMBLY

WARNING: Do not remove the data plates at- tached to the heater base assembly. The data plates contain important warranty and safety information.

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.

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 and con- trols being damaged. Raise fireplace floor with non- combustible material. Make sure material is secure.

CAUTION: Do not pick up heater base assembly by the burner. This could damage heater. Only handle base assembly by grates.

IMPORTANT: Make sure the heater burner is level. If heater is not level, heater will not work properly.

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" drill bit (metal or masonry as applicable)

•flathead screwdriver

1.Apply pipe joint sealant lightly to male NPT threads of the fitting to be threaded into gas control. Connect approved flex- ible gas hose to gas control fitting in heater (see Figure 11). IMPORTANT: Hold gas fitting with wrench when connect- ing flexible gas hose.

2.Locate two masonry screws in hardware package.

3.Place heater base in fireplace.

 

Flexible Gas

Fitting

Hose (if allowed

by local codes)

 

Figure 11 - Attaching Flexible Gas Hose to Heater

For..com

110398-01A

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Desa VYM27NRPR installation manual Installing Damper Clamp Accessory for Vented Operation, Installing Heater Base Assembly
Page 9 Page 11

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