Desa MVO18VNA, MVO18VPA Installing Appliance, Connecting To Gas Supply, Installation Items Needed

INSTALLATION

Continued

INSTALLING APPLIANCE

WARNING: Special care is required if you are installing the unit into a sunken fireplace. You must raise the fireplace floor to allow access to gas log controls. This will insure adequate air flow and guard against sooting. Raise the fireplace floor using noncombustible material.

CAUTION: Do not pick up ap- pliance assembly by logs. This could damage unit. Only handle assembly by grate.

IMPORTANT: Make sure appliance is level. If unit is not level it will not work properly.

Center the appliance in the fireplace. Make certain the grate front feet sit inside the front edge of the fireplace and that there is adequate clearance around the appliance for access and operation.

Note: The installation of appliances designed for manufactured home (U.S. only) or mobile home installation must conform with the standard CAN/ CSA Z240, Mobile Housing, in Canada, or with the Manufactured Home Construction and Safety Standard, Title 24 CFR, Part 3280, in the United States, or when such a standard is not applicable, ANSI/NCSBCSA225.1/NFPA501A, Manufactured Home Installations Standard.

CONNECTING TO GAS SUPPLY

WARNING:Aqualifiedservice personmustconnectheatertogas supply. Follow all local codes.

WARNING: This appliance requiresa3/8"NPT(NationalPipe Thread) inlet connection to the control valve.

CAUTION: Never connect propane/LP unit directly to the propane/LP supply. This unit re- quires an external regulator (not supplied). Install the external regulator between the unit and the propane/LP supply.

WARNING:Neverconnectnatu- ralgasfireplacetoprivate(non-util- ity)gaswells.Thisgasiscommonly known as wellhead gas.

Installation Items Needed

Before installing heater, make sure you have the items listed below.

•approved flexible gas hose and fittings (supplied with appliance -if allowed by local codes)

•external regulator (propane/LP models only)

•piping (check local codes)

•sealant (resistant to propane/LP gas)

•equipment shutoff valve*

•test gauge connection*

•sediment trap

•tee joint

•pipe wrench

*A CSA design-certified equipment shutoff valve with 1/8" NPT tap is an acceptable alternative to test gauge connection. Purchase the optional CSA design-certified equipment shutoff valve from your dealer. See Accessories, page 17.

For propane/LP units, the installer must supply an external regulator. The external regulator will reduce incoming gas pressure. You must reduce incoming gas pressure to between 11 and 14 inches of water. If you do not reduce incoming gas pres- sure, control valve damage could occur. Install external regulator with the vent pointing down as shown in Figure 6. Pointing the vent down protects it from freezing rain or sleet.

Propane/LP	External
Supply Tank	Regulator
Vent
Pointing
Down
Figure 6 - External Regulator with Vent
	Pointing Down

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