Manuals / State Industries / Household Appliance / Electric Heater

State Industries SBD71 120 A, Pilot Valve - Ohm Test, Sbd Tank Type Heaters Service Handbook

Models: SBD85 500 SBD71 120

1 56

Download 56 pages 57.8 Kb

Page 35

Image 35

SBD TANK TYPE HEATERS

SERVICE HANDBOOK

STEP 14A

PILOT VALVE - OHM TEST

SBD 120 – 400 GAS VALVE

STEP 14A. PILOT VALVE - OHM TEST. If pilot assembly is sparking but no pilot flame is established, disconnect the pilot valve solenoid leads. Using a multimeter, (set to read ohms) test for 20* ohms resistance +/- 5 through the solenoid coil.

IF	THEN
The meter dose not read 20 ohms plus or	•	Replace gas valve
minus 5:
The meter does read 20 ohms plus or	•	Gas valve should work. Also check that
minus 5:		pilot gas is present and pilot tube or
		orifice are not blocked

Technical Training Department	34
Ashland City, TN ©2003

Page 35

Image 35

State Industries SBD71 120, SBD85 500 manual A, Pilot Valve - Ohm Test, Sbd Tank Type Heaters Service Handbook, Then

Contents

SandBlaster Part Number STC-072SERVICE HANDBOOK Also includes Parts ListSBD HANDBOOK SBD TANK TYPE HEATERS SERVICE HANDBOOKSBD TANK TYPE HEATERS SERVICE HANDBOOK Model Breakdown SBD 85 500 P E A CGA DMODEL INSTALLATIONCLEARANCES FROM COMBUSTIBLES Clearance to Combustibles TableSBD TANK TYPE HEATERS SERVICE HANDBOOK EXTERIOR CLEARANCESBD TANK TYPE HEATERS SERVICE HANDBOOK AIR FOR COMBUSTION10 CUBIC FEET OF AIR PER 1,000 BTU MinimumSBD TANK TYPE HEATERS SERVICE HANDBOOK MAKE-UPAIRDIRECT COMMUNICATION 1 Square Inch Per 4,000 BTUH MAKE-UPAIR VERTICAL DUCTSHORIZONTAL DUCTS SBD TANK TYPE HEATERS SERVICE HANDBOOKSBD TANK TYPE HEATERS SERVICE HANDBOOK INSUFFICIENT MAKE-UPAIRBACKDRAFT SBD TANK TYPE HEATERS SERVICE HANDBOOK CONTAMINATED AIRAIR FOR COMBUSTION Flammable Items Natural Gas Supply Gas Manifold Pressure Tap Dirt LegManifold Gas Port GAS PRESSURE REQUIREMENTSSee step 18 for SBD-500gas valve illustration SBD GAS VALVESBD TANK TYPE HEATERS SERVICE HANDBOOK SBD TANK TYPE HEATERS SERVICE HANDBOOK VENTING Atmospheric, Single, and Multiple HeatersCombined Vents Nine Rules for Good VentsSBD TANK TYPE HEATERS SERVICE HANDBOOK Nine Rules for Good Vents continuedNine Rules for Good Vents continued SBD TANK TYPE HEATERS SERVICE HANDBOOKSBD TANK TYPE HEATERS SERVICE HANDBOOK POWER VENT KITS FOR SIDEWALL VENTING3.Intermittent Ignition Control SBD SEQUENCE OF OPERATION1.Thermostat calls for heat 7.Thermostat satisfiesSBD TANK TYPE HEATERS SERVICE HANDBOOK SBD ELECTRICAL SEQUENCE 100 - 109 SeriesSBD TANK TYPE HEATERS SERVICE HANDBOOK SBD ELECTRICAL SEQUENCE OF OPERATION115/60/12A THEN TROUBLESHOOTING SBD WATER HEATERSSTEP TEST THE TRANSFORMERSTEP HIGH LIMIT, LEFT TERMINAL TESTGround 24VAC FM Transformer SBD TANK TYPE HEATERS SERVICE HANDBOOKAfter Push in Reset - 24 VAC is now present TemperatureReset Button Jumper WireCHECK THE PC BOARD Damper ClosedDamper Open INSPECT THE DAMPERSBD TANK TYPE HEATERS SERVICE HANDBOOK Service SwitchPC BOARD MOTOR TEST Motor LeadTHEN THERMOSTAT TESTSBD TANK TYPE HEATERS SERVICE HANDBOOK STEPAdapter ServiceSwitch EFFIKAL DAMPERHeater Harness HARNESS CHARTNORMAL OPERATION TEST FOR 24VAC BETWEEN BLACK COMMON AND BROWNSTEP 8B NORMAL OPERATION continuedSTEP 8A TEST FOR 24VAC BETWEEN BLACK AND ORANGECondition TROUBLESHOOTING THE EFFIKAL DAMPERSTEP 9A SBD TANK TYPE HEATERS SERVICE HANDBOOKSTEP 9B TROUBLESHOOTING THE EFFIKAL DAMPER continuedA1 IS CORRECT, CHECK SERVICE SWITCH POSITION Service SwitchTROUBLESHOOTING THE EFFIKAL DAMPER continued ADJUST END SWITCH TO CAM CONTACTSTEP 10A STEP 10BTHEN WIRE HARNESS TESTSBD TANK TYPE HEATERS SERVICE HANDBOOK STEPTHEN IID MODULE TESTSBD TANK TYPE HEATERS SERVICE HANDBOOK STEPSTEP Power To Module May Be Interrupted To ResetPILOT SPARK TEST SBD TANK TYPE HEATERS SERVICE HANDBOOKTHEN STEP 14APILOT VALVE - OHM TEST SBD TANK TYPE HEATERS SERVICE HANDBOOKTHEN STEP 14BPILOT VALVE TEST - SBD 500 ONLY SBD TANK TYPE HEATERS SERVICE HANDBOOKTHEN MAIN BURNER TESTSBD TANK TYPE HEATERS SERVICE HANDBOOK STEPSTEP FLAME RECTIFICATIONSTEP 16. FLAME RECTIFICATION SBD TANK TYPE HEATERS SERVICE HANDBOOKIID MODULE TEST Pilot is lit - Sparking has stoppedSBD TANK TYPE HEATERS SERVICE HANDBOOK STEPTH TR STEP 18AMAIN GAS VALVE CHECK SBD TANK TYPE HEATERS SERVICE HANDBOOKTHEN STEP 18BMAIN GAS VALVE COIL CHECK SBD TANK TYPE HEATERS SERVICE HANDBOOKSBD TANK TYPE HEATERS GENERAL SERVICE CHARTSERVICE HANDBOOK SBD TANK TYPE HEATERS GENERAL QUESTIONS AND ANSWERSSERVICE HANDBOOK EFFIKAL DAMPER DRIVE ASSEMBLY GAS VALVES SBD MODELS 120 THRU 500ASERIES 110/111 SERVICE HANDBOOKSBD TANK TYPE HEATERS SBD MODELS 120 THRU 500A continued SERIESSERVICE HANDBOOK SBD MODELS 120 THRU 500A continued SERIES SeriesSERVICE HANDBOOK CLEANOUT ASSEMBLYSBD TANK TYPE HEATERS SERVICE HANDBOOKCLEANOUT ASSEMBLY SBD MODELS 120 THRU 500A continued SERIESSBD TANK TYPE HEATERS SERVICE HANDBOOKCLEANOUT ASSEMBLY SBD MODELS 120 THRU 500A continued SERIESSBD TANK TYPE HEATERS SERVICE HANDBOOKCLEANOUT ASSEMBLY SBD MODELS 120 THRU 500A continued SERIESSBD TANK TYPE HEATERS SERVICE HANDBOOKCLEANOUT ASSEMBLY SBD MODELS 120 THRU 500A continued SERIESSBD TANK TYPE HEATERS SERVICE HANDBOOKCLEANOUT ASSEMBLY SBD MODELS 120 THRU 500A continued SERIESSTATE PART COMPONENT PART INFORMATIONSPECIFICATIONS NAMESBD SERVICE CHECKLIST V.WATER PIPING SERVICE HANDBOOKSBD TANK TYPE HEATERS SBD TANK TYPE HEATERS COMMENTSSERVICE HANDBOOK Author Terry MulderCopyright 2006 State Industries, Inc State Water HeatersCOMMERCIAL The Expert’s Choice