INSTALLATION AND OPERATING INSTRUCTIONS

THE GUARDIAN MODEL 102 SSD IS DESIGNED TO LIGHT THE PILOT AND SENSE THE FLAME USING A SINGLE ELECTRODE.  THIS UNIT OPERATES A SKINNER SOLENOID VALVE TO CONTROL THE PILOT GAS.  THE PILOT SENSOR RELIES ON THE PILOT FLAME TO PROVIDE AN ELECTRICAL PATH FOR THE SENSOR CURRENT.  THE FLAME COMPLETES A LOW RESISTANT DC CURRENT PATH TO THE ELECTRODE.  BY DETECTING THE PRESENCE OF DC CURRENT, THE GUARDIAN HAS PROOF OF A STABLE PILOT FLAME AND UPON LOSS OF THE DC CURRENT (PILOT FLAME), THE GUARDIAN IMMEDIATELY ATTEMPTS TO RE-LIGHT THE PILOT FLAME BY IMPRESSING HIGH DC VOLTAGE PULSES ON THE ELECTRODE.  THE IGNITION ARC IS MAINTAINED FOR APPROXIMATELY 15 SECONDS.  IF THE PILOT IS RE-ESTABLISHED, THE GUARDIAN WILL GO BACK INTO THE FLAME MONITOR MODE.  FAILURE TO RE-LIGHT THE PILOT CAUSES A SHUTDOWN OF THE SOLENOID VALVE.

NOTE:  THE VALVE DO NOT CLOSE WHEN THE BATTERY IS REMOVED OR OTHER SIMILAR REMOVAL OF POWER.  THE GUARDIAN DEPENDS ON THE BATTERY FOR OPERATION.  THE CONDITION OF THE BATTERY SHOULD BE CHECKED REGULARLY.

THE PILOT NOZZLE MUST HAVE A GOOD ELECTRICAL GROUND TO THE GUARDIAN PANEL TO ENSURE PROPER SENSING.  NORMALLY, THE GROUND PATH IS ACHIEVED THROUGH THE PILOT NOZZLE, MIXER, MIXER PIPING, FLAME ARRESTOR HOUSING, AND EXTERNAL PIPING AND CONDUIT.  IF A GOOD GROUND IS NOT ESTABLISHED THROUGH THE PIPING, ETC.  IT MAY BE NECESSARY TO INSTALL A SEPARATE GROUNDING WIRE.

THE IGNITOR / SENSOR ELECTRODE MUST BE INSTALLED IN CLOSE PROXIMITY (1/8" TO 1/4") TO THE PILOT TO PROVIDE A SHORT ARC PATH DURING IGNITION AND ALSO BE IN THE PILOT FLAME AFTER FLAME IGNITION.  TRIAL AND ERROR MAY BE REQUIRED TO ACHIEVE PROPER LOCATION OF THE ELECTRODE. 

THE ELECTRICAL CONNECTIONS BETWEEN THE GUARDIAN AND THE VALVES MUST BE CLEAN AND TIGHT.  IMPROPER CONNECTION MAY PREVENT THE SOLENOID VALVE  FROM CLOSING FOLLOWING FLAME FAILURE. 

THE SIDE PANEL COVER HAS THE RESET BUTTON TO OPEN THE SOLENOID VALVE.