Desa VF-24N-BTB, VF-18P-PDG installation manual Connecting to GAS Supply

Page 11

INSTALLATION

Installing Heater Assembly (Cont.) Connecting to Gas Supply

11

INSTALLATION

Continued

CONNECTING TO GAS SUPPLY

WARNING: This appliance requires a 3/8" NPT (National Pipe Thread) inlet connection to the pres- sure regulator.

WARNING: A qualified service person must con- nect heater to gas supply. Follow all local codes.

CAUTION: Never connect propane/LP fireplace directly to the propane/LP supply.This heater requires an external regulator (not supplied). Install the ex- ternal regulator between the heater and propane/LP supply.

WARNING: Never connect natural gas fireplace to private (non-utility) gas wells. This gas is commonly known as wellhead gas.

Installation Items Needed

Before installing heater, make sure you have the items listed be- low.

external regulator (supplied by installer)

piping (check local codes)

sealant (resistant to propane/LP gas)

equipment shutoff valve *

test gauge connection *

sediment trap

tee joint

pipe wrench

approved flexible gas line with gas connector (if allowed by local codes) (provided)

*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 27.

For propane/LP units, the installer must supply an external regu- lator. 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 pressure, heater regulator damage could occur. Install external regulator with the vent point- ing down as shown in Figure 12. Pointing the vent down protects it from freezing rain or sleet.

CAUTION: Use only new, black iron or steel pipe. Internally-tinned copper tubing may be used in cer- tain areas. Check your local codes. Use pipe of 1/2" diameter or greater to allow proper gas volume to heater. If pipe is too small, undue loss of volume will occur.

Installation must include an equipment shutoff valve, union, and plugged 1/8" NPT tap. Locate NPT tap within reach for test gauge hook up. NPT tap must be upstream from heater (see Figure 13 page 12, depending on your model).

IMPORTANT: Install equipment shutoff valve in an accessible location. The equipment shutoff valve is for turning on or shutting off the gas to the appliance.

Apply pipe joint sealant lightly to male NPT threads. This will prevent excess sealant from going into pipe. Excess sealant in pipe could result in clogged heater valves.

WARNING: Use pipe joint sealant that is resistant to liquid petroleum (LP) gas.

We recommend that you install a sediment trap in supply line as shown in Figure 13 page 12, depending on your model. Locate sediment trap where it is within reach for cleaning. Install in pip- ing system between fuel supply and heater. Locate sediment trap where trapped matter is not likely to freeze. A sediment trap traps moisture and contaminants. This keeps them from going into heater controls. If sediment trap is not installed or is installed wrong, heater may not run properly.

CAUTION: Avoid damage to gas control. Hold gas control with wrench when connecting it to gas piping and/or fittings.

External Regulator

Propane/LP

Supply Tank

Vent Pointing Down

Figure 12 - External Regulator With Vent Pointing Down

For more information, visit www.desatech.com

111826-01F

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Contents What to do if YOU Smell GAS Unvented VENT-FREE GAS LOG HeaterSafety Information Table of ContentsRemote Ready Models Product IdentificationUnpacking Optional Remote Control AccessoriesProduct Features Local CodesDetermining if You Have a Confined or Unconfined Space Determining FRESH-AIR Flow for Heater LocationConfined and Unconfined Space Ventilation Air From Outdoors Ventilation AIRVentilation Air From Inside Building Check GAS Type InstallationInstallation and Clearances for VENT-FREE Operation Minimum Noncombustible Material Clearances If Not Using MantelDetermining Minimum Mantel Clearance Using a HoodMantel Clearances Floor ClearancesArea of Various Standard Round Flues Installing Damper Clamp Accessory for Vented OperationInstalling Heater Assembly Installation Items NeededConnecting to GAS Supply Checking GAS Connections Pressure Testing gas Supply Piping systemPressure Testing Heater Gas Connections Checking Gas Joints propane/LP only Lighting Instructions For Your Safety Read Before LightingOperating Heater To Turn OFF GAS to Appliance Manual Lighting ProcedureRemote Control Operation Ghrctb Series Operation Thermostat Control OperationBurner Flame Pattern Inspecting BurnersPilot Flame Pattern Logs Cleaning and MaintenanceCleaning Burner Injector Holder and Pilot AIR Inlet Hole Observed Problem Possible Cause Remedy TroubleshootingRefer to Air for Combustion and Venti Observed Problem Possible Cause VF-18N-PDG/VF-18N-BTB SpecificationsReplacement Parts Wiring DiagramService Hints Technical ServiceIllustrated Parts Breakdown Log sets and mounting plates are ordered as an assemblyVF-24N-PDG, VF-24P-PDG, VF-24N-BTB, VF-24P-BTB Parts List Parts ListAccessories This page Intentionally Left Blank Owners Registration Form Postage Required 111826-01F Warranty Information