Fulton FB-S Horizontal Firetube Boiler - Manual (Page 50)

The Fulton Companies*FB-S Series Manual*Version 2010-0820 rev. 3/5/13
Page 50
b. The 1
st
Low Water alarm cancels
c. The 1
st
Low Water indicator lamp extinguishes but the
burner does not start
d. The 2
nd
Low Water alarm continues to sound
e. The 2
nd
Low Water Alarm/Reset Switch remains
illuminated
v. Press the 2
nd
Low Water Level Alarm/Reset Switch.
vi. Check that:
a. The 2
nd
Low Water alarm cancels
b. The 2
nd
Low Water Alarm/Reset Switch extinguishes
c. The automatic burner firing sequence commences
The Low Water Cutoff tests can be accomplished by isolating the feed pump using the
pump ON/OFF switch on the boiler control panel while the boiler is operating. Allow the
water level to fall by evaporating steam to the system.
Once the 1
st
Low Water Level Alarm is activated the water level can be lowered to the 2
nd
Low Water Level by using the main blowdown valve.
When the 2
nd
Low Water Alarm sounds CLOSE the blowdown valve, turn the feed water
Pump On/Off switch to PUMP ON.
Once the 1
st
Low Water Level cancels the burner should remain off, but the 2
nd
Low Water
Alarm should continue to sound, reset the 2
nd
Low Water Alarm. The burner should start
and the pump restores the water level to normal and stop.
4. Blowdown Procedure
In order to keep the boiler and water level gauge pipe work clear and free from sludge and
scale build-up, regular blowdown should be carried out.
Boiler Blowdown
a) Fully OPEN the fast opening blowdown valve, for a minimum of 5-10 seconds, see
note.
b) Regulate the blowdown flow using the common slow opening Y-type valve.