Fulton FB-S Horizontal Firetube Boiler - Manual (Page 48)

The Fulton Companies*FB-S Series Manual*Version 2010-0820 rev. 3/5/13
Page 48
These cracks would not be there after manufacture but can develop in
service, they are caused by stress due to a combination of pressure loads,
differential expansion, local temperature gradients, oxygen impurities in the
boiler water/steam and inadequate PH (water chemistry) control.
Differential thermal expansion and local temperature gradients all result
from continuous pressure/temperature cycling and heating from cold too
quickly. Water treatment and in particular
oxygen corrosion are covered in Section 3. The importance of correct
water treatment cannot be over emphasized.
To Achieve Long Trouble-Free Boiler Life:
i. Maintain the boiler at working pressure as long as possible, minimize
cycling.
ii. When heating from cold do so slowly.
iii. Maintain water treatment within the prescribed limits at all times, blowdown
frequently.
3. Daily Operating Tests
Caution
If any of the following tests fail to function as described, shut down the boiler
immediately and consult the factory.
With the burner firing, carry out the following tests:
Note
Ensure the correct water level is maintained during pressure build up. If
any part of the equipment is not operating correctly, the fault should be
investigated before the boiler is used. Ensure all blowdown piping is safe and
discharged to a blowdown receptacle.
a) Flame Sensor (UV Photo Cell) Check
i. Remove the burner UV photocell from its plug-in connection (on the side of
the burner) and cover the detection window to exclude all light. The
burner control should immediately (2-3 seconds gas, 5 seconds oil) go
to a lockout/flame failure condition and will require manual resetting.
Clean the UV photocell with soft cloth before replacing it.