Desa Vanguard GVC50NA Owner's Operation And Installation Manual

Desa Vanguard GVC50NA Owner's Operation And Installation Manual Manual pdf 30 page image

30100749SERVICEPROCEDURESContinuedChanging Burner Orifice1. Shut off gas supply toheater.2. Remove lower frontaccess panel on heater.3. Disconnect burner tubefrom orifice holder (seeFigure 20).4. Remove orifice holderfrom burner (see Figure20).5. Use socket or open-endwrench to remove the oldorifice from the orificeholder.6. Clean and replace orifice,or replace with neworifice.7. Turn on gas to heater andcheck for gas leaks. Applya mixture of liquid soapand water to all joints.Bubbles forming show aleak. Correct all leaks atonce.8. Replace lower frontaccess panel.Figure 20 - Orifice Location (35,000 BTU/Hr Burner Shown)BurnerTubeOrificeHolderOrificeBurnerBlack BlueFan Switch(Off/On/Auto)Red FanSwitch(N.O.)BlackRedWhiteGreenWhiteOn110/115 V.A.C.BlowerMotorBlackOffAutoBLOWERWIRINGDIAGRAM(For Models WithBlower Assembly)Figure 21 - Orifice