Global 5120 - 3.2.6 Automatic Shut-Off (SO) System

GlobalPowerTechnologies  3-11
5120
3.2.6 AutomaticShut-O󰀨(SO)System
TheAutomaticShut-O󰀨Systemisdesignedtoturno󰀨thefuelsupplytotheTEGiftheburn-
ergoesout. TheSO valvecontainsanelectromagnet thatispowered by athermocouple
mountedontheburner(seeFigure15).Whenthethermocoupleisnolongerheatedbythe
ame,thecurrentwilldroptozero,causingthevalvetoclose.
IftheSOvalvefailstostayopenafterthegeneratorhaswarmedupforveminutesthenthe
SOsystemneedstobechecked.
1) MakesurethatthebuttonontheSOvalveisfullydepressedbeforereleasingit.This
isnecessarytoactivatethelatchingcoilofthevalve.
2) ChecktheThermocouple
a) RemovethethermocouplettingfromthebottomoftheSOvalve.
b) Connect one lead of an ohm meter to the end of the thermocouple tting.
Connect the other lead of the ohm meter to the casing of the thermocouple
cable.Ifanohmreadingregistersonthemeterthenthethermocoupleisokay.
Iftheresistanceisequaltoinnitythenthethermocoupleisdamagedandmust
bereplaced.
3) ChecktheShut-O󰀨Valve.
a) RemovethethermocouplettingfromthebottomoftheSOvalve.
b) ConnectoneleadofanohmmetertotheSOvalveatthepointwherethetipof
thethermocouplewasincontactwiththevalve.Connecttheotherleadofthe
ohmmetertothecasingoftheSOvalve.
c) IfanohmreadingregistersonthemeterthentheSOvalveisokay.Iftheresis-
tanceisequaltoinnitythentheSOvalveisdamagedandmustbereplaced.
SIControlModuleSpecications
Electrical:
InputVoltage:
Minimum4.0V
Maximum12.0V
InputCurrent: Maximum150MA(withTEGoperating)
OutputVoltage: 12kVMinimum
SparkRate: 1persecond(approximate)
NoiseConducted:
40mVP-P
28mVRMS
FlameFailureRe-ignitionTime: 15seconds
SparkGap:
Nominal: 3.2mm(0.13”)
Minimum: 2.5mm(0.10”)
Maximum: 6.3mm(0.25”)
ContinuousOperatingTimeWithoutCharge: 16Hourswithfullchargedbatteryat23ºC.