www.desatech.com111245-01C 33OBSERVED PROBLEMGas odor during combustionDark residue on logs or insideof fireplaceNote: After removing all causesof residue deposits, completelyclean fireplace and appliancesof all residue before reusingappliance.White powder residue formingwithin burner box or on adjacentwalls or furniturePOSSIBLE CAUSE1. Foreign matter between con-trol valve and burner2. Gas leak. See Warningstatement on top ofpage 321. Improper log placement2. Drafts or other air currentsaffecting flame pattern3. Air holes at burner inletblocked4. Burner flame holes blocked1. When heated, vapors fromfurniture polish, wax, carpetcleaners, etc. may turn intowhite powder residueREMEDY1. Take apart gas tubing andremove foreign matter2. Locate and correct all leaks(see Checking Gas Connec-tions, page 19)1. Properly locate logs (see In-stalling Logs, page 24)2. Eliminate source of draftsaround heater3. Clean out air holes at burnerinlet. Periodically repeat asneeded4. Remove blockage1. Turn heater off when usingfurniture polish, wax, carpetcleaners or similar productsTROUBLEShOOTINGContinuedSERVICE hINTSWhen Gas Pressure Is Too Low• pilot will not stay lit• burners will have delayed ignition• heater will not produce specified heat• for propane/LP units, propane/LP gas supplymay be lowYou may feel your gas pressure is too low. If so, con-tact your local natural or propane/LP gas supplier.TEChNICAL SERVICEYou may have further questions about installation,operation or troubleshooting. If so, contact DESAHeating Products’ Technical Service Departmentat 1-866-672-6040. When calling please have yourmodel and serial numbers of your heater ready.You can also visit DESA Heating Products’ techni-cal service web site at www.desatech.com.SPECIFICATIONSCGEFP33NRB• Rating (Variable): 20,000/33,000 Btu/Hr• Gas Type: Natural• Ignition: Electronic (Automatic),Piezo (Manual)• Manifold Pressure: 3.5" W.C.• Inlet Gas Pressure (in. of water):Maximum - 10.5", Minimum* - 5"• Shipping Weight: 122 lbs.CGEFP33PRB• Rating (Variable): 20,000/33,000 Btu/Hr• Gas Type: Propane/LP• Ignition: Electronic (Automatic),Piezo (Manual)• Manifold Pressure: 8.0" W.C.• Inlet Gas Pressure (in. of water):Maximum - 14", Minimum* - 11"• Shipping Weight: 122 lbs.* For input adjustments