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Troubleshooting
6-44
Algas-SDI Operations & Maintenance Manual P/N 52632
Solenoid Valve Leak Test
Shut the outlet hand valve. The inlet hand valve should be open. Start the
vaporizer and allow it to heat up until the heaters shut off. This allows any
accumulated liquid in the vaporizer to be forced back toward the supply tank.
Turn the vaporizer off. Shut off power at the Main disconnect. Shut the inlet
hand valve. Cautiously bleed off or use up any gas pressure in the vaporizer and
outlet supply piping. When the pressure is at 0 psi on the vaporizer pressure
gauge shut the outlet hand valve off. Open the inlet hand valve. The solenoid
valve is closed and you should not have any pressure build up in the vaporizer.
If pressure increases, the solenoid valve is leaking and needs to be repaired or
replaced. If it is not leaking in this condition, turn power back on at the Main
disconnect.
DO NOT
start the vaporizer. Check again for a leaking solenoid
valve. Pressure should remain at zero. If pressure does not remain at zero,
change the control board.
Figure 21 - Solenoid Valve Leak Test
Solenoid Valve Leak Test.wmf