Installation
Compress 3000 AWES – 6720892204 (2020/06)
12
5.7
Electrical connection
DANGER:
Electrical shock!
The heat pump components conduct electricity.
▶ Before working on the electrical system, disconnect the components
from the power supply.
NOTICE:
The system will be damaged if it is turned on without water.
If the system is turned on before it is filled with heating system water, the
heating system components can overheat.
▶ Fill, vent and establish the correct operating pressure in the DHW
cylinder and heating system
before
turning on the heating system.
The electrical connection for the indoor unit must be safely
interruptable.
▶ Install a separate safety switch that completely de-energizes the
indoor unit. When the power supply is separate, a separate safety
switch is needed for each supply line.
▶ Select the appropriate conductor cross-sections and cable types for
the respective fuse protection and routing method.
▶ Connect the heat pump according to the wiring diagram. No
additional consumers may be connected.
▶ When changing the PCB, note the colour coding.
▶ Ensure to install residual current device based on normative
requirements in each country. We recommend to use residual current
device type B.
5.7.1
EMS BUS
NOTICE:
Malfunction due to faults!
High-voltage lines (230/400 V) in the vicinity of communication lines
can cause the heat pump to malfunction.
▶ Route the EMS-BUS cable separately to the power cables. Maintain a
minimum distance of 100 mm. Routing alongside sensor cables is
permitted.
EMS-BUS and CAN-BUS are not compatible.
▶ Do not connect EMS-BUS units to CAN-BUS units.
The control unit is connected via the EMS BUS to the installation module
in the indoor unit.
The control unit is supplied with power via the BUS cable. The polarity of
the two EMS BUS cables is irrelevant.
The following applies for accessories that are connected to the EMS BUS
(see also the installation instructions for the respective accessories):
▶ If several BUS units are installed, there must be a minimum spacing of
100 mm between them.
▶ If several BUS units are installed, connect them in parallel or in a star
configuration.
▶ Use cable with a minimum cross-section of 0.75 mm
2
.
▶ In case of external inductive interferences (e.g. from PV systems),
use screened cables. Only earth the shielding to the casing on one
side.
5.7.2
CAN-BUS
NOTICE:
Malfunction due to faults!
High-voltage lines (230/400 V) near communication lines can cause the
indoor unit to malfunction.
▶ Run the screened CAN-BUS cable separate from the power cables.
Maintain a minimum distance of 100 mm. Routing alongside sensor
cables is permitted.
CAN-BUS: do not connect 12 V direct voltage output "Out 12 V DC" on
the installation module.
NOTICE:
Mixing up the 12 V and CAN-BUS connections will result in a system
fault!
The communication circuits are not designed for a constant voltage of
12 V.
▶ Make sure that both cables are connected to the correspondingly
marked connections on the printed circuit board (CAN high / CAN
low).
The outdoor unit and indoor unit are connected via a communication
cable, the CAN-BUS.
A LIYCY cable (TP) 2 x 2 x 0.75 (or equivalent) is suitable
as an
extension cable outside of the unit
. Alternatively, twisted pair cables
approved for outdoor use with a minimum cross-section of 0.75 mm
2
can be used. The shield should be earthed at both ends:
▶ At casing of the indoor unit
▶ To the earth terminal of the outdoor unit.
The connection between the printed circuit boards is by two wires
because the 12 V supply from the installer module must not be
connected.
The
Term
switch marks the start and end of the CAN-BUS connection.
Make sure that the right boards are terminated and that all other boards
within the CAN-BUS connection are not terminated.
Содержание Compress 3000 AWES 2-6
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