16
3) All the guards are in position and, if not, for
whatever reason, any rotating parts will be free
and clear without restriction.
4) Battery covers are in place and there is nothing
on top of or touching the engine, which is not
part of the original supply specification.
5) The raw water supply for cooling is available
without restriction. Typically, restriction
occurs from a plugged cooling loop strainer.
When engine is running make sure that the coolant
temperature, oil pressure and raw cooling water flow
are within the limits specified on the relevant
Installation & Operation Data Sheet (see Page 5).
If the coolant temperature is excessive, check:
a) Cooling loop strainers
b) Proper functioning of thermostat
c) Condition of heat exchanger tube bundle
2.6 STARTING/STOPPING THE ENGINE
2.6.1 To Start Engine
Use main pump controller for starting. Follow
instructions provided by controller manufacturer.
On UL/FM engines, use main pump controller for
starting and stopping the engine. Should the main
pump controller become inoperable, the engine can be
manually started and stopped from the engine gauge
panel. For manual starting and stopping of an engine
with a gauge panel: Position MODE SELECTOR to
MANUAL RUN. (Refer to Figure #8). Lift and hold
MANUAL CRANK #1, until engine starts, or release
after 15 seconds. If unit fails to start, wait for 15
seconds, use MANUAL CRANK #2 and repeat step.
If RAW COOLING WATER is not flowing or
engine COOLANT
TEMPERATURE is too HIGH, open cooling system
manual by-pass valves.
Note: On C32H Engines you can also start engines
using manual starting contactors.
IMPORTANT: Main pump controller selector should
be in the OFF position when starting from engine
gauge panel. Be sure to return selector on main pump
controller and engine gauge panel to AUTOMATIC
after completing manual run.
2.6.1.1 Start Engine for Test Purposes (“Soft Start”)
During installation of the sprinkler system or initial
commissioning, it may be desirable to start the engine
at a reduced speed. Reducing the speed reduces the
pressure of the pump discharge. This allows leak
detection to be performed at reduced system pressure
and reduces the likelihood of water hammer at start.
The process is simple with a mechanical engine, as it
has a mechanical linkage that can be removed. No
provision exists on most electronic engines.
C32H models from Clarke are equipped with a “Soft
Start” feature to allow operation at a reduced speed.
To use the feature, the engine should be started
manually from the engine gauge panel. To use the
feature:
1) Switch the main fire pump controller to the
OFF position.
2) Switch the MODE SELECTOR to
MANUAL RUN. (Refer to Figure #8).
3) Press the “menu key” on the PV380 display
gauge.
4) Toggle down the list of menu options and
highlight “Soft Start”, then press the “Enter”
key.
5) The next screen will display one choice,
“Request Soft Start”. Press the “Enter” key.
6) The next screen will allow initiation of Soft
Start or the choice to cancel the process. To
proceed with the Soft Start, crank and start the
engine with one of the Manual Crank switches
on the front of the panel.
7) The engine will start and run at 1100 rpm until
the “Confirm” key is pressed. Once the
“Confirm” key is pressed, the engine will
increase speed at the rate of 10 rpms per
second until it reaches rated speed.
2.6.2 To Stop Engine
If engine is started from main pump controller use
main pump controller to stop the engine.
If engine is started from engine gauge panel: Lift and
hold MANUAL STOP SWITCH, until engine stops.
Close cooling system manual by-pass valve if opened.
Note: This is NOT the switch to use during cycle-
crank testing. This switch will allow the engine to
briefly start, before stopping the engine.
IMPORTANT: DO NOT leave the MODE
SELECTOR switch in the MANUAL RUN position
during AUTOMATIC operation. (The controller will
be unable to stop the engine and DAMAGE MAY
RESULT).
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