Options (Factory Installed); Description And Function; Description Of The Product; Function Description - Wilo Control EC-Fire Notice De Montage Et De Mise En Service

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5.4.2 Options (factory installed)

• Insulation monitoring device (CPI)

6 Description and function

6.1 Description of the product

6.1.1 Function description

The microcontroller-controlled EasyControl
switchgear is designed for control of up to 3 single
pumps with a fixed speed which can be switched
on independent of the pressure and switched off
regardless of the pressure and volume flow.
In a 2-pump system only one pump is always run-
ning, in a 3-pump system, 2 pumps can be oper-
ated as base-load pump and peak-load pump.
A pump is kept as a standby pump in the event of
failure.
Dry-running protection can be realised by the use
of an optional switch input (e.g. a float switch in
the break tank). In the event of a dry run, a visual
signal is displayed and forced switch-off of the
relevant pumps occurs.
Faults are recorded and stored in the fault
memory.
The current operating data and
operating states are indicated on the LCD display
and via LEDs on the front side. Operation is carried
out via a rotary knob on the front side.

6.1.2 Switchgear set-up

The switchgear comprises the following main
components:
• Main switch: for switching the switchgear on/off
• Control panel:
• LEDs for displaying the current operating state
(operation/fault)
• LCD display for displaying the current operating
data and individual menu items
• Operating button for menu selection and
parameter input
• Contactor combinations for switching the individ-
ual pumps
• Fuse protection of pump motors
An overview of the individual components can be
found in the following tables and the referenced
illustrations.
Fig. 1: Overview of operating components
1 Main switch
2 LCD display
3 Operating button
4 LED indicators
42
Fig. 2 – 8: Internal structure
1 Mains connection terminal
2 Converter bridge for selecting the voltage of the mains
connection
3 Earth terminal strip(s)
4 Terminal strips control/sensor
5 Contactor
6 Overcurrent relay
7 Control board
8 Potentiometer for rated motor current
9 RS485 interface for ModBus RTU
10 Jumper for setting the termination/polarisation for
the ModBus RTU
11 Main switch
12 Insulation monitoring device

6.2 Function and operation

This section contains all of the information on how
the switchgear functions as well as information on
the menu structure.
DANGER due to electrical voltage!
When performing work on the uncovered
switchgear, there is a risk of fatal electrocution!
All work on individual components must be per-
formed by a qualified electrician.
NOTICE
Following a power supply interruption, the
switchgear will automatically start up in the
last operating mode set.

6.2.1 Switchgear operating modes

How it works
In automatic mode, a connected pump is switched
on if the pressure drops below the start-up pres-
sure. In systems with 2 pumps, one of the pumps
is generally defined as a standby pump. In systems
with 3 pumps, the second pump may cut-in
depending on demand, in which case the third
pump is then the standby pump.
A visual indicator appears on the LCD display and
the green LED lights up while the pump(s) is/are in
operation. Depending on parameterisation, the
collective run signal is activated, as well as the
signal lamp and internal buzzer.
Upon reaching the deactivation point (pressure/
volume flow – see section 6.2.1 Switchgear oper-
ating modes). The pumps are switched off after
the set switch-off delays have elapsed.
To optimise pump running times, general pump
cycling is carried out every time the pump is
switched off.
In the event of one pump malfunctioning, auto-
matic changeover to a fully-functional pump
occurs. An optical alarm signal is output.
Additionally, depending on parameterisation, an
acoustic alarm signal can be output via the inter-
nal buzzer and the signal lamp activated.
WILO SE 06/2018