Modbus Rtu" Field Bus Connection; Commissioning; Factory Setting; Checking The Motor Direction Of Rotation - Wilo Control SC-Booster Instrucciones De Instalación Y Funcionamiento

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Do not connect any external voltage to the
terminals!

7.2.11 "ModBus RTU" field bus connection

An RS485 interface is available for connecting a
building management system via ModBus RTU.
Insert the cable into the threaded cable gland
and secure it. Connect the wires to the terminals
according to the connection diagram.
CAUTION!
No external voltage may be applied.
NOTICE
• To be able to use the function, the values in the
menus 5.5.1.0 to 5.5.1.4 must be set.
• If the switchgear is at the end of the bus cable, this
cable must be terminated in the switchgear. Set
the DIP switches to the "ON" position for this pur -
pose (Fig. 8, item 1).

8 Commissioning

WARNING! Risk of fatal injury!
Commissioning by qualified personnel only!
Improper commissioning poses a
risk of fatal injury. Have commissioning per -
formed by qualified personnel only.
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!
We recommend that the commissioning of the
switchgear is performed by Wilo customer service.
Before switching on for the first time, the on-site
wiring must be checked to ensure it is correct, in
particular the earthing.
Tighten all connection terminals prior to
commissioning!
In addition to the activities described in these
installation and operating instructions, it is neces -
sary to perform the commissioning measures in
accordance with the installation and operating
instructions of the overall system (pressure-
boosting system).

8.1 Factory setting

The control system is preset in the factory.
The factory settings can be restored by Wilo
customer service.

8.2 Checking the motor direction of rotation

By briefly switching on each pump in "Manual
mode" operating mode (menu 3.2.1.1, 3.2.2.1,
3.2.3.1 and 3.2.4.1), check whether the direction
of rotation of the pump in mains operation corre -
sponds to the arrow on the pump housing.
If the direction of rotation of all pumps in mains
operation is incorrect, swap over any 2 live wires in
the main mains cable.
38
SC switchgears without frequency converter:
• If the direction of rotation of only one pump in
mains operation is wrong, swap over any 2 live
wires on motors in direct starting (DOL) in the
motor terminal box.
• If the direction of rotation of only one pump in
mains operation is wrong, swap over 4 connec -
tions on motors in star-delta starting (SD) in the
motor terminal box. In this case, swap the winding
start and winding end of 2 live wires (e.g. V
and W for W ).
1 2
SC switchgears with frequency converter (FC):
• Mains operation: see above (SC switchgears with -
out frequency converter)
• Frequency converter operation: Set all pumps to
the "Off" operating mode (menu 3.2.1.1, 3.2.2.1,
3.2.3.1 and 3.2.4.1) and then set each pump indi -
vidually to "Automatic". Briefly switch on the indi -
vidual pump to check the direction of rotation in
frequency converter operation. If the direction of
rotation of all pumps is wrong, swap over any 2 live
wires on the frequency converter output.

8.3 Adjusting the motor protection

• WSK/PTC: No adjustment is required for the
excess temperature protection.
• Excess current: See section 6.2.2.

8.4 Pressure transmitters and optional modules

Comply with the installation and operating
instructions for pressure transmitters and optional
additional modules.

9 Maintenance

Have maintenance and repair work carried out
by qualified personnel only!
DANGER! Risk of fatal injury!
There is a risk of fatal injury from electric shock
when working on electrical devices.
• The switchgear should be voltage-free and
secured against unauthorised switch-on during
any maintenance or repair work.
• Any damage to the connection cable should only
ever be rectified by a qualified electrician.
• The switch cabinet must be kept clean.
• Clean the switch cabinet and fan if they are dirty.
The filter mats in the fans must be checked,
cleaned and replaced if necessary.
• If the motor power is 5.5 kW or more, check the
contactors for loss of contact material from time
to time and replace them if there is significant loss
of contact material.
for V
1 2
WILO SE 09/2018