8
IM05805001K
Effective November 2003
Press ACK.ALARM to view the messages, then press STEP
to scroll through them. Press ACK.ALARM at any time to
exit messages and return to the system readings.
5.
Operation of the Controller
With AC power applied and the main disconnect switch in
the ON position, the
LMR
is controlling and monitoring
the system.
The
LMR
can NOT be programmed while the pump is
running. During the programming of the unit, if the keyboard
is ignored for more than one (1) minute, the
LMR
will
automatically return to the automatic mode and will start
the pump upon receiving any start request.
5.1 Semi-Automatic or Automatic Operation
Controllers with a pressure switch, but with the Running
Period Timer (RPT) disabled, are capable of semi-automatic
operation only. Such controllers will start automatically
in response to the pressure switch but must be manually
stopped with the “STOP” pushbutton. For sprinkler or
standpipe systems where an automatically controlled
pumping unit constitutes the sole supply, the controller
shall be wired for manual shutdown (per NFPA 20).
Manual shutdown shall also be provided where required by
the authority having jurisdiction.
Provisions to convert automatic controllers to semi-
automatic operation, in affect disabling the RPT function,
is done so by ‘Enabling’ the MANUAL STOP MODE.
Refer to section 6.2 for programming of this function.
Controllers fitted with the RPT option are capable of fully
automatic operation. Such controllers will start automatically
in response to the pressure switch and stop automatically
when the pressure has been satisfied and the RPT has
timed out.
In all situations, if the water pressure is NOT above the
programmed start point, the pump will stop while the
STOP pushbutton is held closed. Upon releasing the STOP
pushbutton, the pump will restart. Note that the RPT will
reset each time the STOP pushbutton is pressed.
Furthermore, if the controller is started manually, either
by the local/remote start pushbutton or emergency handle,
then it MUST be stopped manually by depressing the
STOP pushbutton.
5.2 Run Period Timer
(Not available on Foam Pump Controllers – see section
15.2 of this manual)
The Run Period Timer (RPT) performs the automatic
stopping function in a Fire Pump Controller after a start
initiated by the pressure switch during automatic operation.
The purpose of the RPT is to ensure that the pump motor is
not subjected to frequent starts in response to the pressure.
Refer to Section 6 for programming of the RPT.
NOTE:
The RPT timer must be reset to ten (10) minutes
when the controller is placed in service.
5.3 Sequential Start Timer
The Sequential Start Timer is standard in all LMR electric
fire pump controllers.
“The controller for each unit of multiple pump units
operating in parallel shall incorporate a sequential timing
device to prevent any one motor from starting simultane-
ously with any other motor. If water requirements call for
more than one pumping unit to operate, the units shall start
at intervals of 5 to 10 seconds. Failure of a leading motor
to start shall not prevent subsequent pumping units from
starting” – NFPA, Pamphlet 20, Chapter 7.
The sequential start timer (SST) delays the starting of a fire
pump in response to the pressure switch. It does not delay a
pushbutton or emergency handle start. Refer to Section 6
for programming of the SST.
On pressure loss, if the pressure switches operate more or
less simultaneously, the starting of all but the lead pump
must be delayed. This ensures that inrush currents of all the
pump motors are not simultaneously imposed on the power
supply. With a SST in each controller, any pump may be
selected as the lead pump by appropriate setting of the
timers. If the lead pump restores the pressure in less than
the time delays applied to the lag pumps, then the lag pumps
will not start.
In addition, the provision of a sequential start timer, set
to a few seconds delay, will prevent the lead pump controller
from responding to momentary hydraulic transient pressure
loss which would otherwise start the fire pump unnecessarily.
The SST can be programmed from 0 – 300 seconds.
Typically, each pump should be delayed by 5-10 seconds
from the pump ahead of it. If hydraulic transients are a
problem, all timers can be adjusted for a few seconds
extra time delay.
5.4 Phase Failure & Phase Reversal
The
LMR
monitors all three incoming phases and can detect
both Phase Failure and Phase Reversal conditions. Each has
its own relay with a Form-C contact wired to TB1. The
additional Form-C contact is accessible to the user and
located on the relay board.
5.5 Weekly Test Timer
Each controller comes standard with the ability to test the
motor. Normally the pump is exercised once every 1-4 weeks
for a few minutes. Note that the Weekly Test Timer is a
24-hour clock.
The programmed test date can be viewed on the LCD
display by pressing the TIME/PRINT key on the membrane
faceplate. If the Weekly Test is not programmed, the display
will show ‘NO WKLY TEST’.
If programmed for a Weekly Test, the controller initiates
the starting sequence by energizing 1CR on the relay board.
Once the test is completed, and no other starting causes exist,
the controller will automatically de-energize the main
contactor, thus stopping the motor.
Refer to Section 6 for programming.
Содержание Cutler-Hammer LMR
Страница 2: ...Effective November 2003 ...
Страница 6: ......
Страница 20: ...14 IM05805001K Effective November 2003 8 FIGURE 1 MAIN TERMINAL BLOCK TB1 9 FIGURE 2 RELAY CARD ...
Страница 21: ...IM05805001K 15 Effective November 2003 10 FIGURE 3 TYPICAL SCHEMATIC ...
Страница 22: ...16 IM05805001K Effective November 2003 11 FIGURE 4 MAIN DISPLAY PANEL 12 TABLE 1 POWER WIRE CABLE REFERENCE ...
Страница 23: ...IM05805001K 17 Effective November 2003 13 FIGURE 5 LMR PROGRAMMING MENU ...
Страница 27: ...IM05805001K 21 Effective November 2003 18 FIGURE 7 FDF SCHEMATIC ...
Страница 28: ...22 IM05805001K Effective November 2003 19 FIGURE 8 FDF MAIN TERMINAL BLOCK TB1 20 FIGURE 9 FDF RELAY CARD ...
Страница 30: ...24 IM05805001K Effective November 2003 22 FIGURE 10 FDM MEDIUM VOLTAGE DIMENSIONS ...
Страница 31: ...IM05805001K 25 Effective November 2003 23 FIGURE 11 FDM SCHEMATIC ...
Страница 32: ...26 IM05805001K Effective November 2003 24 FIGURE 12 FDM MAIN TERMINAL BLOCK TB1 25 FIGURE 13 FDM RELAY CARD ...
Страница 37: ...IM05805001K 31 Effective November 2003 ...