English
6
WILO SE 12/2020
5.4 Accessories
Accessories must be ordered separately:
(see also Wilo-Select)
6 Description and function
6.1 Description of the product (Fig. 1)
6.1.1 Function description
The Comfort switchgear, controlled by a program
-
mable logic controller (PLC), is used to control
pressure-boosting systems with up to 6 single
pumps. The pressure of a system is controlled as a
function of the load with appropriate signal trans
-
mitters. The controller acts on a frequency con
-
verter (CC-FC version), which in turn influences
the speed of the base-load pump. A modification
of the speed changes the volume flow and thus
the rated power of the pressure-boosting system.
Only the base-load pump is speed-controlled.
Uncontrolled peak-load pumps are switched on
and off automatically according to load require
-
ments, while the base-load pump handles
fine-tuning to the pre-set setpoint.
In the CCe version, each pump has an (integrated)
frequency converter.
6.1.2 Set-up of the switchgear
The set-up of the switchgear is dependent on the
performance of the pumps that are to be con
-
nected, and the version (CC, CC-FC, CCe) (see:
Fig. 1a CC direct starting; Fig. 1b CC star-delta
starting, Fig. 1c CC-FC direct starting; Fig. 1d
CC-FC star-delta starting, Fig. 1e CCe). It consists
of the following main components:
• Main switch: Switches the switchgear on/off
(item 1).
• Touch display: Display of operating data (see
menus) and the operating status. Menu selection
and parameter input possible via touch sensitive
surface (item 2).
• Programmable logic controller: Modular design
PLC with power supply unit. The configuration
depends on the system (item 3).
• Frequency converter: Frequency converter for
load-sensitive speed control of base-load pump -
only available for CC-FC version (item 4).
• Motor filter: Filter for ensuring a sinusoidal motor
voltage and for suppressing voltage peaks - only
in the CC-FC version (item 5).
• Fuse protection for drives and frequency con
-
verter: Fuse protection for the pump motors and
the frequency converter. For devices with
P
2
≤ 4.0 kW: Motor protection switch. On the CCe
version: Circuit breaker for the fuse for the pump
mains supply cable (item 6).
• Contactors/contactor combinations: Contactors
for switching on the pumps. In devices with
P
2
≥ 5.5 kW, including the thermal tripping
devices for excess current protection (default
value: 0.58 * IN) and the time relay for the star-
delta switchover (item 7).
• Manual-0-Automatic switch: Switch for selecting
the pump operating modes "manual" (emergency/
test operation on the mains; motor protection
available), "0" (pump switched off – no activation
possible via PLC) and "auto" (automatic mode
enabled via PLC) (item 8).
The speed of every pump (0 – 100 %) can be set
in manual mode with the manual control in the
CCe version.
6.2 Function and operation
DANGER! Risk of fatal injury!
When working on the open switchgear, there is
a danger of electric shock from touching the live
components.
The work must only be carried out by qualified
personnel!
Option
Description
Signal module
Relay output module for outputting individual operation
signals and fault signals
DDC and control module
Input terminal assembly for switching potential-free control
contacts
GSM module
Mobile radio module for dialling into GSM networks
GPRS module
Mobile radio module for dialling into GPRS networks
WebServer
Controller module for connection to Internet or Ethernet data
transmission
Communication module "ProfiBus DP"
Bus communication module for "Profibus DP" networks
Communication module "CanOpen"
Bus communication module for "CanOpen" networks
Communication module "LON"
Bus communication module for "LON" networks
Communication module "ModBus RTU"
Bus communication module for "ModBus" networks
Communication module "BACnet"
Bus communication module for "BACnet" networks
Mains switching
External auxiliary device for switching to redundant supply
network
Other options on request
