(4)
Ash Silo - LOW LEVEL
(red)
(5)
Silo Vent Filter - ON
(green)
b.
Provide momentary contact pushbuttons or selector switches for the
following:
(1) System - START
(3 required)
Bucket elevator
Chain drag conveyor
Screw conveyors
(2)
System - STOP (red head)
c.
Provide sensors such that the following items can be alarmed on an
ash handling system control panel annunciator.
(1)
Ash silo - HIGH LEVEL
(2)
Bucket elevator - EMERGENCY SHUTDOWN
(3)
Screw conveyor - EMERGENCY SHUTDOWN
(4)
Chain drag conveyor - EMERGENCY SHUTDOWN
(5)
Silo vent filter - OFF
(6)
Plugged Hopper
d.
Provide auxiliary devices required for the control functions above
and laminated plastic name plates for devices on the panel front.
e.
Provide local control panel for operating and indication of the
rotary ash conditioner with the following functions:
(1)
Power - ON (red)
(2)
Water - ON/OFF
(3)
Ash feeder - ON/OFF
(4)
Rotary ash conditioner - START/STOP/JOG
(5)
Normal Stop
(6)
Wash out - START/STOP
(7) Emergency Stop: Provide control panel mounted at grade level
for remote operation of the rotary ash conditioner with the
following functions:
(a)
Rotary ash conditioner - START/STOP
(b)
Normal stop
(c)
Emergency stop
SECTION 15501N
Page 118
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