Assessments - 4, GPA: 4 ( )

Fabricante : Lennox Hearth Arquivo Tamanho: 3.72 mb Arquivo Nome : Língua de Ensino:

3. Pilot burning, no gas to burner, Valve knob “ON,” Wall Switch “ON.” A. Wall switch or wires defective. Check wall switch and wires for proper connections. Jumper wire across terminals at wall switch, if burner comes on, replace defective wall switch. If okay, jumper wires across wall switch wires at valve, if burner comes on, wires are faulty or connections are bad. B. Thermopile may not be generating sufficient millivoltage. Check thermopile with millivolt meter. Take reading at thermopile terminals of gas valve. Should read 325 millivolts minimum with optional wall switch “OFF.” Replace faulty thermopile if reading is below specified minimum. C. Plugged burner orifice. Check burner orifice for stoppage and remove. 4. Frequent pilot/burner outage problem. A. Pilot flame may be too low or blowing (high) causing the pilot/ valve safety to drop out. Clean and/or adjust pilot flame for maximum flame impingement on thermocouple (Figure 9 on page 8). TROUBLESHOOTING THE ELECTRONIC IGNITION SYSTEM Note: Before troubleshooting, be sure that the appliance main line gas shut-off valve, the gas control valve and the wall switch are in the“ON”position. Important:Valve system troubleshooting should only be accomplished by a qualified service technician. SYMPTOM POSSIBLE CAUSES CORRECTIVE ACTION 1. Burner will not light. A. Faulty Valve System. See Below. B. “OFF/ON” or wall switch defective. Disconnect the two black wires from the wire nuts. Test switch(s) for continuity with a multimeter. If continuity is not indicated, switch(s) is defective and must be replaced. Note:Before replacing“OFF/ON”switch, be sure to check wiring for loose connections or broken wires and repair as needed. 2. Burners come “ON” but go “OFF.” A. Burner orifice plugged. Check main burner orifice(s) for stoppage. Clean or replace. B. Obstructed vent system. Check vent system for obstructions. START • Turn Off Gas Supply • Assure Valve Switch Is In ON Position • Disconnect Control Harness • Set Thermostat To Call For Heat Insert A End View Of Control Harness Connector 24 Volt Hot 24 Volt Common 24 Volt Switched Check For Damaged Or Missing Terminals In Connector Igniter Terminals Insert B • Check For Proper Voltage At Control Harness (See Insert A). Voltage Should Be 24VNO Between Thermostat Or Pressure Switch And 24V Common And 24V Hot. 2 YES • Plug Control Harness Into Valve. Wait For Internal Check Delay. • Igniter Warms Up And Glows Red. NO • Replace Igniter/Flame Rod Assembly. YES YES1 • Turn On Gas Supply. • Pilot Burner Lights. NO YES CHECK • Line Voltage Power • Low Voltage Transformer • Limit Controller • Thermostat • Wiring • With Pilot Burner Cable Connected, Measure NO Voltage At Valve HSI Element Output. 24V Nominal. (See Insert B) 1 2 YES • Replace Valve. • Measure Voltage Between 24V Hot And 24V Common Leads To Valve Control. Must Measure At Least 19.5 VAC With Igniter Powered (See Insert A). To Identify Proper Lead, This Check Must Be Done With The Valve Control Connected And Igniter Powered. NO • Check Transformer And Line Volt Supply. YES • Replace Pilot Assembly. • Check That Pilot Flame Makes Good Contact With Pilot Burner Flame Rod. • Check For Good Electrical Connection Through The Pilot Tubing. • If Both Of The Above Are Good, Replace Igniter/Flame Rod Assembly. YES • Main Valve Opens And Main Burner Lights. NO YES • System Is Okay. NO Assure Plot Gas Tubing Is Purged. Recycle Call For Heat If Necessary. YES • Check That Pilot Gas Is Flowing. Wait To • Replace Valve. • Cycle Thermostat Off And Back On. • Main Burner Lights. NO • Replace Valve. 1 Igniter Will Cycle Off And Back On Once During The 90 Second Ignition Trial. All Voltage Measurements Must Be Taken While The Igniter When Measured Voltage At Connections, Use Care To Assure Terminals Are Not Damaged. Is Powered. 2 REPLACEMENT PARTS LIST GAS CONTROLS — SIT MILLIVOLT No. DESCRIPTION Natural Propane Part No. Qty. Part No. Qty. 30. Gas Valve -SIT 43K07 1 88J53 1 31. Piezo Igniter 10K86 1 10K86 1 32. Pilot Assembly 69L17 1 69L18 1 33. Pilot Generator 60J79 1 60J79 1 34. Thermocouple 74L57 1 74L57 1 35. Pilot Tube 74L56 1 74L56 1 36. Electrode And Cable 74L58 1 74L58 1 GAS CONTROLS — HONEYWELL ELECTRONIC No. DESCRIPTION Natural Part No. Qty. 40. Gas Valve -Honeywell 62L18 1 41. Pilot Assembly 62L14 1 42. Transformer 42J32 1 43. Ignitor Assembly (Kit) 87L54 1 No. DESCRIPTION EDV3530 EDV4035 EDV4540 Part No. Qty. Part No. Qty. Part No. Qty. Gas Fireplace Assembly – – – – – – 1. Hood H3895 1 H3896 1 H3897 1 2. Louver Assembly, Top H3726 1 H2727 1 H3728 1 3. Louver Assembly, Bottom H3734 1 H3735 1 H3736 1 4. Enclosure, Glass Front (Complete) 91L18 1 H3724 1 91L16 1 5. Bustle, Top H4964 1 H3741 1 H3742 1 6. Bustle, Bottom 91L25 1 H3729 1 H3730 1 7. Nameplate (Brand) 12L15 1 12L15 1 12L15 1 8. Latch 69L21 2 69L21 2 69L21 2 9. Catch, Door, Magnetic 69L31 1 69L31 1 69L31 1 10. Log Set (Complete) 55M02 1 55M03 1 55M03 1 11. Burner Assembly 55M29 1 55M30 1 55M30 1 12. Grate Ass...

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