completely terminally wired, ready for field connections, and mounted in a
[NEMA Type 2 drip-proof] [NEMA Type 4 watertight and dust tight] enclosure
arranged so that controller current carrying parts will not be less than
300 mm 12 inches above the floor. The controller shall be equipped with an
externally operable isolating switch which manually operates the motor
circuit. Means shall be provided in the controller for measuring current
for all motor circuit conductors. Controller shall cause pump to run for a
minimum of ten (10) minutes prior to automatic shutdown. Automatic
stopping shall be accomplished only after all starting causes have returned
to normal and after the minimum pump run time has elapsed. Controller
shall also cause pump to stop upon signal from low liquid level switch
installed in the AFFF concentrate tank. Controller shall monitor and
provide individually displayed audible and visual alarms on the front panel
for loss of a phase or line power, phase reversal, low AFFF concentrate
level, and pump room temperature. Each alarm lamp shall be labeled with
rigid etched plastic labels. The controller shall be equipped with the
following:
a.
Voltage surge arresters installed per NFPA 20.
b.
Bourdon tube pressure switch or a solid state pressure switch with
independent high and low adjustments, automatic starting relay
actuated from normally closed contacts, visual alarm lamps and
supervisory power light.
c.
Thermostat switch with adjustable setting to monitor the pump room
temperature and to provide an alarm when temperatures falls below
5 degrees C 40 degrees F.
d.
Terminals for remote monitoring of pump running, pump power supply
trouble (loss of power or phase and phase reversal), and pump room
trouble (pump room temperature and low reservoir level, and for
remote start.
e.
A 7-day electric pressure recorder with 24-hour spring wound
back-up. The pressure recorder shall provide a readout of the
system pressure from 0 to 2067 kPa 0 to 300 psi, time, and date.
2.17.4
Power Supply
**************************************************************************
NOTE: Verify that project drawings indicate power
supply in accordance with NFPA 20 requirements.
**************************************************************************
The source and arrangement of power supply to the pumps shall be as shown
on the drawings and in accordance with NFPA 20.
2.17.5
AFFF Pressure Maintenance Pump
**************************************************************************
NOTE: A pressure maintenance pump is required only
if AFFF concentrate piping length exceeds 15 meters
(50 ft.) or extends beyond the equipment room.
**************************************************************************
Pump shall be provided as indicated to maintain pressure on the AFFF
concentrate distribution piping. Pump construction and components shall be
similar to those provided for the primary AFFF concentrate pump. Pressure
SECTION 13955A
Page 20
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