EATON Diesel Plus
O & M Manual IM05805019K-002
Diesel Engine Fire Pump Controller
Effective April 2015
EATON INDUSTRIES CANADA COMPANY
www.chfire.com
9
4.2.3 Run Period Timer
The RPT is only active when active when the auto stop is set
to "On". The Run Period Timer (RPT) performs the automatic
stopping function in the controller. After a start initiated by the
pressure sensor or via the “Pump Start” input the controller will
start and run for the duration of the RPT.
The purpose of the RPT is to ensure that the engine is not
subjected to frequent starts in response to the pressure. Refer
to Appendix D for programming of the RPT.
4.2.4 Sequential Start Timer
The Sequential Start Timer is standard in all Diesel Plus fire
pump controllers.
The controller for each unit of multiple pump units shall
incorporate a sequential timing device to prevent any one
driver from starting simultaneously with any other driver.
Each pump supplying suction pressure to another pump shall
be arranged to start within 10 seconds before the pump it
supplies. The controllers for pumps arranged in series shall
be interlocked to ensure the correct pump starting sequence.
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 driver to start shall not prevent subsequent
drivers from starting.
The sequential start timer (SST) delays the starting of a fire
pump in response to the pressure sensor or “Pump start” input.
It does not delay a “Remote start”.
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 10 seconds from the pump
ahead of it.
4.3 Program Descriptions
Refer to Appendix A attached.
4.3.1 Control Inputs
The Diesel Plus has six (6) individual input control signals and
nine (9) programmable inputs.
CAUTION
SEVERE DAMAGE COULD BE CAUSED TO THE MICROPROCESSOR BOARDS
IF A VOLTAGE IS APPLIED TO THESE INPUTS. THEY ARE INTERNALLY
POWERED.
4.3.2 Control Input Descriptions
The Control Input state definitions are as follows.
Connected -
When the input is shorted by an external contact or
connection.
Unconnected -
When the input is NOT shorted by an external
contact or connection.
The Control Input operations are defined as follows.
NOTE
Terminal 11 is common to all of the inputs outlined below.
Remote Start (Terminal 34)
When this input is in the “Connected” state, the Diesel 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 “Unconnected” state, the Diesel Plus
controller will initiate a manual start sequence. This input is
typically wired to remote water control equipment that starts
the controller before the pressure sensor 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 Diesel Plus
controller will initiate an automatic start sequence. This input is
typically wired to a separate pressure switch when the use of a
pressure sensor is not desired.
NOTE
When the controller is programmed for foam operation, the pump start
input will 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 Diesel Plus
controller will signal a visual indication on the main display
board for Low Suction. If the controller is programmed for Low
Suction Shutdown it will initiate the shutdown sequence. Refer
to Appendix D to program Low Suction Shutdown. When the
controller is setup for a foam system, all references to Low
Suction Shutdown will be changed to Low Foam Level.
Low Fuel (Terminal 38)
When this input is in the “Connected” state, the Diesel Plus
controller will signal an audible and visual indication on the
main display board for Low Fuel Level. The Common Alarm
relay will also de-energize for remote monitoring of this alarm.
Interlock On (Terminal 39)
When this input is in the “Connected” state, the Diesel Plus
controller will not permit a start of the motor except in manual
mode. This input is typically used in backup style systems. For
example, the Engine Running contacts from the backup Diesel
Engine Controller are wired into this input. When the Diesel
Engine is running, it will lock out the Diesel Plus panel and
prevent it from starting.
Inputs (1-10)
These are programmable inputs and will function based on
how they are programmed. Refer to Appendix E(a) for
programming details.
