FULTON 60J - Page 26

J OIL-E-08 2008
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3.6.5 2nd. (Overriding) Low Water Check
 (forboilersttedwithSpiraxHighIntegrityLevelControls,seeAppendix'C')
(a) Ensure the following:
  Theburnerisring.
The water level is correct in the boiler.
The water pump is not running.
(b) Switch the pump OFF at the pump override switch.
(c) OPEN the main blowdown valve.
(d) When the water level nears the bottom of the water level gauge sight glass, the LOW WATER
ALARM lamp should illuminate, the low water audible alarm should sound and the burner
  shouldstopring.
(e) Continue to blow down. As the water level falls nearer the bottom of the water level gauge sight
glass, the LOW WATER RESET switch should illuminate and the second audible low water
alarm should sound.
(f) CLOSE the main blowdown valve and switch the pump ON at the pump override switch.
  Thewaterpumpshouldnowstarttorunandrelltheboiler.Oncelledtothecorrectlevelthe
water pump should stop. The low water alarm should continue to sound, the LOW WATER RE
SET switch and LOW WATER ALARM lamp should remain illuminated and the burner should
NOT start.
(g) When the water level in the boiler is correct, the burner can be restarted by depressing the LOW
WATER RESET switch for a maximum of 2 seconds.
1. The First and Overriding low water checks can be carried out in one operation to reduce
the blowdown time and possible interruption to the steam supply.
2. Where the water level tests are to be carried out at full pressure, evaporate the water
down to 1st. low level as in 3.8, blowdown the boiler from 1st. to 2nd. low water.
The purpose of adopting this procedure is to prevent steam and water being expelled
from the blowdown vessel vent because of prolonged blowdown.
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