5.2.4 WATER LEVEL CONTROL PROBES
Level 1
2 standard level probes fitted
Level 2 and 3
1 x Vegaswing 66 vibrating level switch.
1 x Vegaflex 86 TDR sensor for continuous level and interface measurement.
1 x Vegamet 381 Ex Signal conditioning and display instrument for level sensors.
For more information see Appendix A - TI149 High Integrity Self-Monitoring Low Water
Limiters.
5.3 FILLING THE BOILER ALL MODELS
1.
The door isolator should be in the OFF position.
2.
Ensure the Boiler and Pump Switches are in the OFF position.
3.
Ensure the following valves are OPEN:
a)
Main steam stop valve.
b)
Steam pressure gauge isolating valve.
c)
All valves in the feed waterline.
d)
Water level gauge (sight glass) isolating valves.
4.
Ensure the following valves are SHUT:
a)
Main blowdown valve.
b)
Water level gauge blowdown valves.
The feed pump seals are water cooled.
The pump must never be allowed to run whilst dry, irreparable damage may result.
Ensure the pump is fully primed before energising the motor.
5.
Vent the pump.
6.
Turn the door isolator to the ON position.
7.
Turn the Pump switch to the ON position.
8.
The feedwater pump should start (check the pump direction of rotation) and fill the boiler to
the correct working level and the pump then automatically switch OFF.
Note: If the boiler water level is below its correct level, the feedwater pump will operate. When the water reaches
the correct level (two thirds up the water level gauge), the pump will stop. If the water level is above the top of the
level gauge, drain off until the level is in the middle of the water level gauge (sight glass).
Note: It may be necessary to vent the feedwater pump by bleeding air from the plug mounted in the top casting
below the pump motor to pump body connection.
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