Algas SDI VAPORAIRE M-Series, Operation & Maintenance Manual

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Algas-SDI Operations & Maintenance Manual – P/N - 54264
3-19
3. Startup
WARNING
Some of the adjustments require the control enclosure to be open
while the circuits are tested. No LPG vapor must be present around
the enclosure when it is open. The electrical arcing that occurs
when various switches and relays within the enclosure operate is a
possible source of explosive ignition.
NOTE
The heating value adjustment procedure must be done on initial
start-up to assure proper mixed gas heating value. (See Section 4
in the Operations Section, Adjusting the Heating Value of the Mixed
Gas, for instructions on making the heating value adjustment.)
Follow this procedure to start operation of a venturi type of mixer:
1. The vaporizing equipment should be warmed up and standing by ready to
provide LPG vapor. The main vaporizer outlet valve is closed.
2. Drain the surge/accumulator tank and re-close the drain valve.
3. Close the mixed gas outlet valve on the surge/accumulator tank.
4. Open the venturi shutoff valves on each venturi train.
5. Slowly open the main vaporizer outlet valve.
6. Push the
Start
switch. The vapor inlet solenoid valve should open, and the
venturis should start to cycle on. The pressure in the surge/accumulator tank
should build up to the Mixed Gas Pressure setpoint
.
See the pressure adjustment instruction in Section 4, Operation.
7. It is suggested that a flare stack be set up so that the system can be operated
for a short initial period to permit setting the mixed gas (delivery) pressure and
to confirm that the set pressure does not drift. Set the pressure according to
the pressure adjustment instructions in
Section 4, Operation.
8. After pressure adjustments have been made, perform the heating value
adjustment procedure in Section 4, Operation.
9. The system is now ready for operation.
10. When the
SEQUENCER
has exhibited control by shutting off all venturis,
open the mixed gas discharge valve on the surge/accumulator tank and allow
mixed gas to enter the system.
11. Refer to the Troubleshooting Guide in Section 6 if any problems occur.