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Limited Service Fire Pump Controller
Page 6 of 12
still timing, the CR relay remains energized and the motor continues to run for the duration of the
timer setting.
Pressing the STOP push button stops the motor even if TR1 is timing. If the Controller does not
have a TR1 timing relay, the pump motor runs until the STOP push button is pressed.
Manual Local Start - Pressing the START push button energizes relay LRSR. The LRSR
contacts close to latch the LRSR relay and energize the M1 contactor coil to start the motor. The
motor runs until the STOP button is pressed to de-energize the LRSR coil.
Manual Stop – Connecting the jumper wire between TB2-4 and TB2-5 bypasses the TR1
timing relay contacts. When this jumper is installed, the motor runs until the STOP button is
pressed.
Remote Start - The remote start circuit requires the closure of remote contacts to start the
motor. Closing the remote contacts energizes the LRSR relay. The LRSR contacts close and
latch the LRSR relay until the STOP button is pressed.
Deluge Valve Start – A normally closed remote switch energizes the optional deluge valve
relay (DVR). Opening the remote switch de-energizes the DVR, closing the DVR contacts in
parallel with the PS contacts, to energize the CR relay and the TR1 timing relay. When the
remote switch closes, the DVR contacts open to de-energize the CR relay and stop the motor, if
TR1 has timed out.
Lockout – (This feature is not allowed per NFPA 20 and is permitted only when acceptable to
the authority having jurisdiction.) The lockout circuit requires the closure of remote contacts to
stop the motor. Closure of the contacts energizes the LK relay. Contacts LK open to de-
energize the CR relay and stop the motor. If the remote contacts open while the pressure is low,
the motor restarts.
EMERGENCY MANUAL CONTROL - The emergency start handle should only be used if the
Controller fails to start automatically or with the START push button. The motor runs until the
handle is returned to the OFF position or the CIRCUIT BREAKER is opened. To start the
motor when control power is not available, push the T-handle in and rotate counterclockwise
(45°°) to lock in the full ON position in a fast and continuous motion.
Caution: Failure to engage the handle in a fast and continuous motion can
result in damage to the contactor and failure to start the motor.
Pump Run Contacts - The pump run contacts transfer any time the M1 contactor is closed by
either electrical or mechanical means.
Phase Loss Contacts - The phase loss contacts transfer when line or control power is lost or
the line voltage drops more than 15 percent.
Phase Reversal Contacts - The phase reversal contacts transfer when there is a phase
reversal, rotation other than A-B-C.