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Installation and operating instructions: Wilo-SC-Fire Diesel A2P
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6 Description and function
6.1 Product description
6.1.1 Function
The switchgear is used to operate a diesel motor pump in the sprinkler system in accordance with A2P (T1-1).
The manual start-up of the diesel motor is done from the HMI of the switchgear.
Contrary to automatic start-up which is generated by a lack of pressure in one of the 2 pressure switches.
Each pump has 2 pressure switches and each pressure switch has an Auto/0/Manu key switch.
The automatic start-up of the diesel motor follows a start-up sequence which allows for the generation of 6 start-
up attempts, the 2 batteries are used in the course of this sequence.
The status of the unit can be seen on the front of the support box:
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From the LED panel
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From the LCD
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From the audible warning
The operation is performed by means of the rotary knobs, key switches and screen pushbuttons also located on
the front of the box.
It is possible to perform an emergency start by means of the 2 buttons on the front of the cabinet. In this way,
the battery voltage is directly applied to the terminals of the diesel starter, without going through the control.
The water level in the start-up tank is monitored at all times. If the level in the tank goes under 2/3 of the “full
tank” level, then the diesel motor starts up to supplement the level.
Potential-free contacts are ready to transmit the collective run/malfunction signals to the BMS device.
6.1.2 Structure of the switchgear
The structure of the switchgear may vary according to the performance of the pump to be connected.
The switchgear includes the following components:
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Main switch (Fig. 1, pos. 11): Power supply of the switchgear
•
Human Machine Interface (HMI):
o
LCD screen enabling operational data to be displayed (see menus) (Fig. 1, pos. 2),
o
LED indication of the status of the system (functioning/malfunctioning) (Fig. 1, pos. 1),
o
Control button enabling menu navigation, menu selection and entering of parameters
(Fig. 1, pos. 1, 2, 3).
•
Key switch (Fig. 1, pos. 8 and 9): Operation mode (Auto/0/Manu) of pressure switches 1 and 2
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Screen display indicating the voltage and battery charging current (Fig. 1, pos. 4, 5)
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Key switch (Fig. 1, pos. 6): access to level 2
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Battery selection switch (Fig. 1, pos. 7): selection of the battery for the voltage and current displays
(Fig. 1, pos. 4, 5)
•
Audible warning: Activated in case of an alarm (Fig. 1, pos. 10)
