Desa CGP20 Owner's Operation And Installation Manual

Contents

Desa CGP20 Owner's Operation And Installation Manual Manual pdf 8 page image

8103569VENT-FREE PROPANE/LP GAS HEATERBLUE-FLAME CGP20, CGP20L AND RP30DContinuedCONNECTING TOGAS SUPPLYThe installer must supply an external regu-lator. The external regulator will reduceincoming gas pressure. You must reduceincoming gas pressure to between 11 and 14inches of water. If you do not reduce incom-ing gas pressure, heater regulator damagecould occur. Install external regulator withthe vent pointing down as shown in Figure12. Pointing the vent down protects it fromfreezing rain or sleet.NOTICE: A qualified service per-son must connect heater to gassupply. Follow all local codes.CAUTION: Never connectheater directly to the propane/LPsupply. This heater requires anexternal regulator (not supplied).Install the external regulator be-tween the heater and propane/LPsupply.CAUTION: Use only new,black iron or steel pipe. Inter-nally-tinned copper tubing maybe used in certain areas. Checkyour local codes. Use pipe of 1/2"diameter or greater to allowproper gas volume to heater. Ifpipe is too small, undue loss ofpressure will occur.Install sediment trap in supply line as shownin Figure 13, page 9. Locate sediment trapwhere it is within reach for cleaning. Locatesediment trap where trapped matter is notlikely to freeze. A sediment trap traps mois-ture and contaminants. This keeps themfrom going into heater controls. If sedimenttrap is not installed or is installed wrong,heater may not run properly.CAUTION: Use pipe joint seal-ant that is resistant to liquid pe-troleum (LP) gas.Installation must include a manual shutoffvalve, union, and plugged 1/8" NPT tap.Locate NPT tap within reach for test gaugehook up. NPT tap must be upstream fromheater (see Figure 13, page 9).Apply pipe joint sealant lightly to malethreads. This will prevent excess sealantfrom going into pipe. Excess sealant in pipecould result in clogged heater valves.Typical Inlet Pipe Diameters20,000 Btu/Hr models 3/8" or greater30,000 Btu/Hr models 1/2" or greaterPlacing Heater On MountingBracket1. Locate two horizontal slots on backpanel of heater.2. Place heater onto mounting bracket.Slide horizontal slots onto stand-outtabs on mounting bracket.Installing Bottom MountingScrews1. Locate two bottom mounting holes.These holes are near bottom on backpanel of heater (see Figure 11).Figure 10 - Mounting Heater OntoMounting Bracket2. Mark screw locations on wall.3. Remove heater from mounting bracket.4. If installing bottom mounting screwsinto hollow or solid wall, install wallanchors. Follow steps 1 through 4 un-der Attaching To Wall Anchor Method,page 7.If installing bottom mounting screwinto wall stud, drill holes at marked lo-cations using 9/64" drill bit.5. Replace heater onto mounting bracket.6. Place spacers between bottom mount-ing holes and wall anchor or drilledhole.Figure 11 - Installing Bottom MountingScrewsINSTALLING TOWALLContinuedStand-Out Tab Mounting Bracket(attached to wall)HorizontalSlots7. Hold spacer in place with one hand.With other hand, insert mounting screwthrough bottom mounting hole andspacer. Place tip of screw in openingof wall anchor or drilled hole.8. Tighten both screws until heater isfirmly secured to wall. Do not overtighten.Note: Do not replace front panel at thistime. Replace front panel after makinggas connections and checking for leaks(see pages 8-9).Propane/LPSupply TankVentPointingDownExternalRegulatorFigure 12 - External Regulator with VentPointing Down