Desa VYM27NRPR Owner's Operation And Installation Manual

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Desa VYM27NRPR Owner's Operation And Installation Manual Manual pdf 11 page image

110398-01AFor more information, visit www.desatech.comFor more information, visit www.desatech.com11114. Place logs in their proper position on heater base. See Install-ing Logs, page 13.5. Center heater base and logs front-to-back and side-to-side infireplace.6. Carefully remove logs without moving heater base.7. Mark screw locations through one hole on each side of themounting bracket (see Figure 12). If installing in a brick-bot-tom fireplace, mark screw locations in mortar joint of bricks.8. Remove heater base from fireplace. If installing optional con-trol accessories, do so at this time. Follow all directions pro-vided with accessory.9. Drill holes at marked locations using 3/16" drill bit.10. Attach base assembly to fireplace floor using two masonryscrews (in hardware package).INSTALLATIONContinuedOFFPILOTONHILOFigure 12 - Attaching Base Assembly to Fireplace FloorMasonry ScrewMounting FlangesCONNECTING TO GAS SUPPLYWARNING: A qualified service person must con-nect heater to gas supply. Follow all local codes.WARNING: Never connect propane/LP heater di-rectly to the propane/LP supply. This heater requires anexternal regulator (not supplied). Install the externalregulator between the heater and propane/LP supply.Installation Items NeededBefore installing heater, make sure you have the items listed below.• external regulator (for propane/LP units only, supplied by installer)• piping (check local codes) • sediment trap• sealant (resistant to propane/LP gas) • tee joint• equipment shutoff valve * • pipe wrench• test gauge connection *WARNING: Never connect natural gas heater toprivate (non-utility) gas wells. This gas is commonlyknown as wellhead gas.INSTALLATIONInstalling Heater Base Assembly (Cont.)Connecting To Gas Supply* A CSA design-certified equipment shutoff valve with 1/8" NPTtap is an acceptable alternative to test gauge connection. Purchasethe optional CSA design-certified equipment shutoff valve fromyour dealer. See Accessories, page 24.For propane/LP units, the installer must supply an external regula-tor. The external regulator will reduce incoming gas pressure. Youmust reduce incoming gas pressure to between 11 and 14 inches ofwater. If you do not reduce incoming gas pressure, heater regulatordamage could occur. Install external regulator with the vent point-ing down as shown in Figure 13. Pointing the vent down protects itfrom freezing rain or sleet.Installation must include an equipment shutoff valve, union, andplugged 1/8" NPT tap. Locate NPT tap within reach for test gauge hookup. NPT tap must be upstream from heater (see Figure 14, page 12).IMPORTANT: Install equipment shutoff valve in an accessiblelocation. The equipment shutoff valve is for turning on or shuttingoff the gas to the appliance.Check your building codes for any special requirements for locatingequipment shutoff valve to fireplaces.Apply pipe joint sealant lightly to male NPT threads. This willprevent excess sealant from going into pipe. Excess sealant in pipecould result in clogged heater valves.CAUTION: Use only new, black iron or steel pipe.Internally-tinned copper tubing may be used in certainareas. Check your local codes. Use pipe of 1/2" diam-eter or greater to allow proper gas volume to heater. Ifpipe is too small, undue loss of volume will occur.WARNING: Use pipe joint sealant that is resistantto liquid petroleum (LP) gas.Figure 13 - External Regulator With Vent Pointing Down(propane/LP gas only)Propane/LPSupply TankExternalRegulatorVentPointingDown