Algas SDI Direct Fired F6-ASME, Operation & Maintenance Manual

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Operation
Algas-SDI Operation and Maintenance Manual – P/N – 54000 11
Operation
3
Direct Fired Vaporizer start up procedure
1. Before starting the vaporizer, close the outlet valve in the vapor service
line.
2. Fill the vaporizer with LP gas liquid by slowly opening the liquid supply
line valve between the storage tank and the vaporizer. If this valve is
opened too quickly, the excess flow valve in the tank may close. If this
occurs, close the liquid supply line valve and allow the excess flow valve
to equalize and re-open.
3. If the vaporizer is installed with a separate burner supply line not
connected to the vaporizer (
see page 7
), open the valve supplying gas to
the Thermostat Supply Regulator.
4. Turn the temperature control dial on the thermostat counter-clockwise to
the "RUN" position (“PILOT” on first version). “RUN” position (“PILOT”
on first version) indicates that the pilot and main burner can start
operating.
Figure 6
–
Temperature control dial in “RUN” position
5. Turn the igniter switch to “ON”. Press the pilot button. Continue to hold
the pilot button for 30 to 60 seconds and release. Pilot should remain lit.
NOTE:
If the ambient temperature is below 10°F (-12°C) when the pilot
button is released it is likely that the main burner will immediately cycle on.
As soon as the LP gas inside the heat exchanger heats up above this
temperature the main burner will cycle off. This is normal operation for the
new Algas-SDI thermostat and is different than previous gas valves used.