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Global Power Technologies
3-9
5120
2)
Check the air filter screen for any tears or holes. If any are found it should be replaced.
3)
Check the burner screen.
4)
Check the ceramic spacer.
3 .2 .5 Spark Ignition (SI) System
The spark ignition system consists of 3 major components.
1)
The high voltage spark electrode which ignites the gas.
2)
The pressure switch which senses gas pressure.
3)
The control module which generates the high voltage to the electrode and also has con
-
trol functions.
3 .2 .5 .1 SI Theory of Operation
When fuel is supplied to the TEG the presence of fuel pressure causes the pressure switch
to close. This, combined with the absence of heat sensed by the spark electrode, causes the
control module to generate 12 kVolt sparks. These sparks arc from the spark electrode to the
combustion chamber wall and ignite the fuel present in the burner. Once ignition begins, the
presence of heat signals the control module to stop sparking within five minutes.
The control module contains a D-size 2 volt, 2.5 amp-hour re-chargeable battery and a constant
potential battery charger. A new fully charged battery provides about 16 hours of continuous
starting capability without recharging. Twenty minutes of recharging is enough for one start
cycle. If the battery is completely discharged it will require fifteen hours to fully recharge.
3 .2 .5 .2 SI Maintenance
WARNING: To prevent high voltage shock remove the orange wire from the pres-
sure switch and make sure it can not come into contact with other electrical
connections .
1)
Check the operation of the SI system as follows:
a)
Remove the Spark Electrode by loosening the wing-nut and sliding the electrode
out .
b)
Inspect the electrode for any cracks in the ceramic rod. If any cracks are found
the electrode must be replaced.
c)
Slide the electrode back into position until it stops, then pull it back 3 to 6mm (1/8
to1/4”). The ceramic rod should extend about 25mm (1”) from the holding screw.
d)
Tighten the wing-nut only until it is snug. DO NOT over tighten or the ceramic rod
will crack.
e)
Loosen the orange and brown wire connectors from the terminals on the pressure
switch and then short the circuit between the two terminals. Arcing should occur
in the combustion chamber (making a clicking noise) at the rate of one per sec
-
ond .
f)
If arcing occurs the system is functioning well.
2)
Check the pressure switch. It should close at a pressure of 13.8 kPa (2 psig) and open
at 6.9 kPa (1 psig). Replace the pressure switch if necessary.
Summary of Contents for 5060
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Page 10: ...Global Power Technologies 1 2 5120 ...
Page 15: ...Global Power Technologies 1 7 5120 ...
Page 27: ...Global Power Technologies 2 12 5120 Figure 13 Wiring Diagram 5120 TEG ...
Page 35: ...Global Power Technologies 3 8 5120 Figure 18 Burner Assembly ...
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Page 50: ...Global Power Technologies 4 3 5120 Figure 26 220 Watt L C Connection and Adjustment Details ...
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Page 55: ...Global Power Technologies 5 4 5120 Figure 30 Cathodic Protection System Parts Identification ...
Page 57: ...Global Power Technologies 5 6 5120 ...
Page 63: ...Global Power Technologies 6 6 5120 Figure 33 Exhaust Stack Removal ...
Page 75: ...Global Power Technologies 7 2 5120 7 2 Physical Dimensions Figure 42 Physical Description ...