Algas-SDI Operation and Maintenance Manual – P/N – 54000
5-26
Troubleshooting
5
1. PILOT -
TROUBLESH
O
OTING TREES #1 & #2
The pilot flame is adjusted at the factory to provide a non-blowing blue flame.
If the flame is not adequate or the pilot does not stay lit, check the pilot
burner to see if it is clear of any obstructions.
Flame should envelope 3/8” to 1/2" (9 to 13 mm) of the thermocouple tip. If
the pilot flame is too low, the thermocouple will not generate sufficient
voltage to hold the main burner’s valve open. If the pilot flame is too small,
clean the pilot burner orifice, or replace the pilot. Each 160H pilot uses #23
pilot orifices.
2. I
GNITER
W
ILL NO
T SPARK
–
TROUBLESHOOTING TREE #3
Check the reigniter battery and replace if necessary.
Verify that the spark electrode is not in contact with the pilot hood and that
spacing from the hood is not greater than 1/8” (3 mm).
Check if the spark electrode is saturated with moisture/water. Wipe any
moisture/water or light the vaporizer manually with a torch to dry it.
Check the rocker switch by removing the leads and touching them together.
If the reigniter spark is established, then the rocker switch is faulty.
3.
MAIN BURNER WILL NOT
IGNITE
-
TROUBLESHOOTING TREE #
4
Check the pilot burner as per 1. above.
Check burner regulator. Disconnect tube from outlet side of regulator and
check output pressure.
If pilot burner and burner regulator check out OK, the problem is in the
thermostat. Replace thermostat (the main burner will not come on unless the
temperature in the heat exchanger drops).
4. I
F VAPOR
PRESSURE DROPS -
TROUBLESHOOTING TREE #
5
Check burner; check pilot as per 1. and 2. above.
If vapor pressure drops, but main burner(s) is working, vapor demand
exceeds vaporizer capacity.
Check liquid excess flow valve and shut off valve; make sure they are open.
Close liquid inlet valve upstream of strainer. Bleed down system and clean
strainer filter.
Summary of Contents for 160H
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Page 42: ...Algas SDI Operation and Maintenance Manual P N 54000 5 32 APPENDIX A TECHNICAL INFORMATION...
Page 43: ...Figure 11 160H Vaporizer Replacement Parts 3 11 13 5 6 1 2 7 4 14 10 12 8 9...
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