(2)
Bunker - LOW LEVEL
(3)
Stoker hopper (one required for each hopper) - HIGH LEVEL
(4)
Stoker hopper (one required for each hopper) - LOW LEVEL
(5)
EMERGENCY SHUTDOWN (Auxiliary contacts for remote alarm)
(6)
Blank (3 required)
d.
Size panel to accommodate future addition of one stoker hopper and
associated equipment.
e.
Provide auxiliary devices required for control functions indicated
above.
f.
Provide laminated plastic name plates for devices on panel face.
2.9.19.2
Remote Controls
Provide controls for the following items in the main plant control room as
specified in VAMS Section 15901N CONTROLS AND INSTRUMENTATION BOILER PLANT:
a.
Conveyor system - EMERGENCY STOP
b.
Bunker - HIGH LEVEL ALARM
c.
Bunker - LOW LEVEL ALARM
d.
Stoker hopper (one required for each hopper) - HIGH LEVEL
e.
Stoker hopper (one required for each hopper) - LOW LEVEL
f.
Under Bunker conveyor system - START/STOP
g.
Coal scale - START/STOP
2.9.19.3
Control Sequence
To ensure that coal does not back up during system startup or shutdown,
design controls so that on startup, the last piece of equipment to handle
coal starts first and on shutdown, stops last.
2.9.19.4
Additional Controls
Provide as shown. These controls include local START and STOP pushbuttons
or three-position selector switches for the following:
a.
Belt feeders
b.
Belt conveyors (at head pulley)
c.
Flight conveyor
d.
Coal scale
e.
EMERGENCY STOP pushbuttons which stop the entire system shall be
provided where indicated.
SECTION 15501N
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