O & M Manual IM05805020K
EATON LMR Plus
Effective September 2013
Electric Fire Pump Controllers
a defeater screw located on the side of the operator
handle.
Note:
The isolation switch is not required on Limited
Service controllers. A circuit breaker with a thermal
magnetic trip setting between 150 and 250 percent will
be used.
3.6 Contactor(s)
The contactor(s) (M, in full voltage and soft start
controllers; 1M and 2M, in part winding; M and A, in
primary resistor; R, S and Y, in autotransformer; 1M, 2M,
1S and 2S, in wye-delta) connect the pump motor to the
supply, under control of the pressure switch, start
pushbutton, or emergency handle.
The contactor coil(s) are connected to the supply voltage
of the controller. If a replacement coil is ever required,
the correct voltage must be ordered.
3.7 External Pushbuttons
Start
The start pushbutton is used to initiate a local manual
start of the pump motor.
Stop
The stop pushbutton will initiate the stopping sequence
of the fire pump motor. Pressing the stop button will put
the controller back into the automatic mode. If a starting
condition exists, the pump motor will start again once the
stop button is released.
4. OPERATION
4.1 General
This section specifically describes the operation and
functional use of the LMR Plus controller. The practical
use of and operation within each category will be
discussed. In this section, it is assumed that prior
sections of this manual were reviewed and that the
operator has a basic understanding of the hardware.
4.2 Automatic Start / Stop
The LMR Plus controller will automatically start and stop
the fire pump motor as dictated by the features supplied
and their programmed set-point values. A summary of
the controller intelligence and supervisory circuits that
constantly monitor the condition of the system pressure,
inputs, and system alarm points is provided.
4.2.1 Manual Start Sequence
Manual start is defined as a local start, remote start, or
emergency start. Whenever the motor is running via a
manual start, the motor needs to be manually stopped
via the stop pushbutton located on the enclosure flange.
4.2.2 Automatic Start Sequence
Automatic start is defined as a low-pressure condition,
deluge valve start or a pump start. Whenever the motor
is running via an automatic start, the motor can
automatically stop once all starting conditions have
returned to normal and the RPT has finished its timing
cycle. If the controller is programmed for manual stop,
the motor needs to be manually stopped via the local
stop pushbutton located on the enclosure flange.
4.3 Control Inputs
The LMR Plus has six (6) pre-defined input control
signals and nine (9) programmable inputs.
4.3.1 Control Input Descriptions
The Control Input state definitions are as follows.
Connected -
When the input is shorted by an external
contact or connection.
Disconnected -
When the input is NOT shorted by an
external contact or connection.
The Control Input operations are defined as follows.
Note:
Terminal 49 is common to all of the inputs outlined
below.
Remote Start (Terminal 34)
When this input is in the "Connected" state, the LMR
Plus controller will initiate a manual start sequence. This
input is typically wired to a remote pushbutton to allow
for remote manual starting of the controller.
Deluge Valve (Terminal 35)
When this input is in the "Disconnected" state, the LMR
Plus controller will initiate an automatic start sequence.
This input is typically wired to remote water control
equipment that starts the controller before the pressure
transducer does. As this input requires a normally closed
contact to open to initiate the start, a jumper is factory
installed. The jumper must be removed in order to utilize
this optional input.
Pump Start (Terminal 36)
When this input is in the "Connected" state, the LMR
Plus controller will initiate an automatic start sequence.
This input is typically wired to a separate pressure switch
when the use of a pressure transducer is not desired.
Note:
When the controller is programmed for foam
operation, the pump start input be a normally closed
input that will open to initiate a start.
Low Suction/Low Foam Level (Terminal 37)
When this input is in the "Connected" state, the LMR
Plus controller will signal a visual indication on the main
display board for Low Suction. If the controller is
CAUTION
SEVERE DAMAGE COULD BE CAUSED TO THE
MICROPROCESSOR BOARDS IF A VOLTAGE IS
APPLIED TO THESE INPUTS. THEY ARE
INTERNALLY POWERED.
