Switchgear For Diesel Pump - Functions - Wilo SiFire Easy Série Notice De Montage Et De Mise En Service

10.9 Switchgear for diesel pump - Functions

AUTOMATIC MODE SWITCHING
AUTOMATIC MODE
MANUAL START
AUTOMATIC START
DETECTION OF DIESEL ENGINE RUNNING The diesel pump running is monitored by a magnetic sender installed on the crown
STOP
PARTIAL COUNTER
BATTERY CHARGING
BATTERIES CHECK
Installation and operating instructions Wilo-SiFire Easy
To switch on/off the automatic mode use selector SA1 on Fig. 14.
It is possible only to remove the key from the switchgear, if the automatic mode is
switched on. If the automatic mode is switched off, a flashing warning light 6 on
Fig. 15 appears.
When the switchgear detects the opening of the starting call contact from the pres-
sure switches, the pump unit starts. The control unit checks (without commanding
the stopping of the motor of the pump unit) for possible engine faults during its
operation. When the engine is started light 8 on Fig. 15 is turned on.
This can be done in three different ways:
- by means of the emergency start buttons on the switchgear
- by means of the buttons START A or START B
- by means of the test button with consent of the associated warning light 5 on
Fig. 15
The test button receives the consent after the automatic start of the engine (acti-
vated by the call of the pressure switches) followed by a turning off or after a start
failure. In both conditions the respective warning light 5 on Fig. 15 turns on. The cir-
cuit used for this function is automatically not ready for operation any more and the
warning light 5 turns off when the test button is pushed and the motor is running.
It take place when the CALL pressure switch contacts are open which is indicated by
a permanent light 9 on Fig. 15.
When the pressure switches contact will be closed (pressure is replaced) the light 9
on Fig. 15 starts to flash. From this moment you can stop the engine only manually
by pushing the button 7 on Fig. 15.
The automatic start also takes place when the pump's priming float contact is
closed, which is indicated by a permanent light 10 on Fig. 15. When the contact
opens, the indicator starts flashing.
Flashing lights stay on for the whole time the motor is running.
In order to facilitate the start, a specific circuit makes a sequence of 6 impulses
automatically alternating on batteries A and B with 15 seconds cycles (5 secs. start,
10 secs. break, both adjustable).
Engine starting is interrupted if the starter motor pinion does not succeed in engag-
ing with the crown gear of the handwheel.
After the first engaging error, the starter motor makes five more engagement
attempts.
At the sixth failure to engage the starter motor continues to run for 5 seconds.
If a battery is found not fail during start-up, it is automatically suspended and the
starting cycle proceeds on the other battery. If both batteries are in faulty, the start-
ing continues all the same until the starting failure alarm and the light 23 on Fig. 15
turn on.
gear of the engine. This function disconnects the starter motor of the engine and
turns on light 8 on Fig. 15
It is possible to switch off the engine ONLY manually pushing the button 7 on Fig. 15.
Warning: It is not possible to stop the motor when the call from the pressure
switches is present and the automatic mode is switched on. In this case it is possible
to stop the motor only by switching off the automatic mode and pushing the
button 7 on Fig. 15.
Push button 18 on Fig. 15 to select the partial counter which indicates the operating
hours and minutes of the last run of the diesel engine. The indicated value will be
zero for the next start of the engine.
The automatic battery charging is managed by checking the current value for the
fast charge and checking the voltage value for the maintenance charge.
The following failures:
• Battery A and/or broken fuse
• Battery B and/or broken fuse
• Short-circuit on A/B battery cables
• Mains failure on battery charges A/B
are indicated by the warning lights 17 and 15 on Fig. 15.
A special circuit checks the efficiency of the batteries, especially during the engine
starting phase. In case of failure on the batteries A or B the light 22 on Fig. 15 turns on.
English
61