J OIL-E-08 2008
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3.8 EVAPORATION CHECKS
With the boiler running under normal load conditions, and the pump stopped having just completed
arellcycle:
(a) Ensure that the boiler water level is correct.
(b) Switch the pump OFF at the pump interrupt / pump run switch.
The water level in the boiler will lower through natural evaporation. When the level nears the bottom of
thewaterlevelgaugesightglass,therstlowwateralarmwillsound,thelowwateralarmlamp
will illuminate and the burner will shut down.
If it is required to check the second low water alarm, wait a further period for the LOW WATER RESET
switch to illuminate.
When the check is complete, proceed as follows:
(a) Switch the pump ON at the pump interrupt / pump run switch.
(b) Pressthelowwaterresetswitch.Thepumpwillstarttorelltheboiler.
If the pump starts to run at any time during the test then the test must be abandoned and restarted
from the beginning.
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3.7 BLOWDOWN PROCEDURES (Daily tests) - continued.
Water Gauge Blowdown
(a) Blowdown the water gauge, set 1.
1. Open the gauge glass blowdown valve A
2. Close (for approx. 3 seconds) the top gauge valve B
3. Open valve B
4. Close (for approx. 3 seconds) the bottom gauge valve C
5. Open valve C
6. Close valve A
Repeat for gauge set 2
On completion of the blowdown procedure ensure that all
isolation valves are OPEN and all blowdown valves CLOSED.
Note: Where a Boiler is operating continuously at steam
pressure, advice should be taken from a Fulton agent
as to the appropriate blowdown procedure.
WORKING
POSITION
STEAM
BLOWDOWN
WATER
BLOWDOWN
Water Level Gauge operating positions.
A
C
Water Level Gauge
Set 1
Water Level Gauge
Set 2
B
C
BB
B
C
C
A
A
A
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Fig. 15 WATER LEVEL SIGHT GAUGE BLOWDOWN