Desa Tech CGN20TA installation manual Check GAS Type, Installation Items, Locating Heater

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OWNER’S MANUAL

INSTALLATION

NOTICE: A qualified service per- son must install heater. Follow all local codes.

CHECK GAS TYPE

Use only natural gas. If your gas supply is not natural gas, do not install heater. Call dealer where you bought heater for proper type heater.

INSTALLATION ITEMS

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

piping (check local codes)

sealant (resistant to propane/LP gas)

manual shutoff valve *

ground joint union

test gauge connection * (see Figure 13, page 10)

sediment trap

tee joint

pipe wrench

WARNING: Never install the heater

in a bedroom or a bathroom

in a recreational vehicle

where curtains, furniture, clothing, or other flammable objects are less than 36 inches from the front, top, or sides of the heater

as a fireplace insert

in high traffic areas

in windy or drafty areas

CAUTION: This heater cre- ates warm air currents. These currents move heat to wall sur- faces next to heater. Installing heater next to vinyl or cloth wall coverings or operating heater where impurities in the air (such as tobacco smoke) exist, may discolor walls.

IMPORTANT: Vent-free heaters add mois- ture to the air. Although this is beneficial, installing heater in rooms without enough ventilation air may cause mildew to form from too much moisture. See Fresh Air for Com- bustion and Ventilation, pages 4 through 6.

CAUTION: If you install the heater in a home garage

heater pilot and burner must be at least 18 inches above floor

locate heater where moving ve- hicle will not hit it

For convenience and efficiency, install heater

where there is easy access for operation, inspection, and service

in coldest part of room

An optional fan kit is available from your dealer. See Accessories, page 19. If plan- ning to use fan, locate heater near an electri- cal outlet.

*An A.G.A. design-certified manual shutoff valve with 1/8" NPT tap is an acceptable alternative to test gauge connection. Pur- chase the optional A.G.A. design-certified manual shutoff valve from your dealer. See Accessories, page 19.

LOCATING HEATER

This heater is designed to be mounted on a wall.

WARNING: Maintain the mini- mum clearances shown in Figure

4.If you can, provide greater clear- ances from floor, ceiling, and join- ing wall.

You can locate heater on floor, away from a wall. An optional floor mounting stand is needed. Purchase the floor mounting stand from your dealer. See Accessories, page 19.

CEILING

36"

Minimum

6" Minimum

From Sides Of

Heater

Left

Right

Side

Side

 

3" Minimum To Top Surface

 

Of Carpeting, Tile Or Other

FLOOR

Combustible Material

Figure 4 - Mounting Clearances As Viewed From Front of Heater

Continued

104190

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Contents What to do if YOU Smell GAS Blue Flame VENT-FREE Natural GAS HeaterCGN20TA Safety InformationUnpacking Product FeaturesProduct Identification Local CodesConfined and Unconfined Space Fresh AIR for Combustion and VentilationProviding Adequate Ventilation Unusually Tight ConstructionDetermining if You Have a Confined or Unconfined Space Determining FRESH-AIR Flow for Heater LocationVentilation Air From Inside Building Ventilation AIRVentilation Air From Outdoors Locating Heater InstallationInstallation Items Check GAS TypeThermostat Sensing Bulb Installing Heater to WallAttaching Mounting Bracket To Wall Installing Bottom Mounting ScrewsPlacing Heater On Mounting Bracket Typical Inlet Pipe Diameters Connecting to GAS SupplyTest Pressures In Excess Of 1/2 Pressure Testing GAS Supply Piping SystemPressure Testing Heater GAS Connections Checking GAS ConnectionsTo Turn OFF GAS To Appliance For Your Safety Read Before LightingOperating Heater Lighting InstructionsPilot Flame Pattern Manual Lighting ProcedureInspecting Burner Thermostat Control OperationObserved Problem Possible Cause Remedy TroubleshootingMaintenance, Gas leak. See Warning statement at Service Hints Cleaning and Maintenance SpecificationsService Publications Replacement Parts Technical ServiceFBD Parts CentralsFAN Kits GA3100A and GA3200TA AccessoriesManual Shutoff CGN20TA Illustrated Parts BreakdownKEY Part Number Description QTY Parts ListCGN20TA 104190 Warranty Information