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10.Open a hot water tap to fill the DHW cylinder. Close the tap when only
water is emerging.
Step 2: Filling the heating system and the micro buffer
11.Move the drain hose to the heating system drain valve VC2.
12.Open the particle filter SC1, the drain valve VC2 and the fill valve
VW2 to fill the heating system.
13.Continue filling until only water comes out of the drain hose.
14.Open the valve VC3 to fill the buffer cylinder.
15.Continue filling until only water comes out of the drain hose and there
are no more bubbles in the heating system.
16.Close the drain valve VC2 and remove the hose.
17.Open the manual air vent valves and close them when only water is
emerging.
18.Continue filling until target pressure ( table 7.4) is displayed at the
GC1 pressure gauge.
19.Close the fill valve VW2.
6
Electrical connection
6.1
Safety instructions
HDanger to life from electric shock
Means to safely disconnect the unit from supply mains must be
incorporated.
▶ Install a safety switch that disconnects all poles from supply mains.
The safety switch shall be an over voltage category III appliance.
▶ If there are several main connections, provide a safety switch of over
voltage category III for each connection.
HRisk to life due to electric shock!
Touching live parts can result in an electric shock.
▶ Before working on the electrical part, disconnect all poles of the
power supply (230 V AC and 400 V 3P) of the indoor unit (fuse,
miniature circuit breaker)
▶ Secure against unintentional reconnection
▶ Check to ensure that the power is disconnected.
HMalfunction due to electrical disturbances!
Power cable (230/400 V) close to a control and sensor cables can cause
the indoor unit to malfunction.
▶ Route the control and sensor cables at a minimum distance of
100 mm from the power cables. Control and sensor cables can be
routed together.
6.2
General notes
▶ Observe safety measures according to national and international
regulations.
▶ Do not connect any additional consumers to the mains power supply
of the device.
▶ Provide fuses as specified:
3-phase mains connection (400 V) for booster heater stage 9 kW
Section 6.9.1
1-phase mains connection (230 V) for booster heater stage 3 kW and
6 kW Section 6.9.1.
▶ Choose cable area and type that represent the fuse protection and
wire mode.
▶ Connect the indoor unit according to the wiring diagram. Never
connect any other consumables.
▶ Always connect three-phase indoor units directly to the distribution
board via three-pole miniature circuit breakers.
▶ Observe the colour coding when replacing circuit boards.
Compress 5800i AW – 6721858460 (2023/06)
It must be possible to safely interrupt the power supply to the device.
▶ 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 unit according to the chapters 6.9.3 – 6.9.5. No
additional consumers may be connected.
When extending temperature sensor cables, use the conductor
diameters given in the cable plan ( Chapter 10.3.3).
6.3
CAN-BUS
NOTICE
The system will be damaged if the 24VDC- and the CAN-BUS
connections are incorrectly connected!
The communication circuits are not designed for 24VDC constant
voltage.
▶ Check to ensure that the cables are connected to the contacts with
the corresponding markings on the modules.
NOTICE
Malfunction due to mixed up connections!
If the "High" (H) and "Low" (L) connections are mixed up, there is no
communication between the heat pump and the indoor unit.
▶ Check to ensure that the cables are connected to the connections
with the corresponding markings in both ends of the CAN-BUS cable.
A
Vcc
Vcc
H
H
L
L
GND
GND
Fig. 26 CAN-BUS heat pump - indoor unit
[A]
Heat pump
[B]
Indoor unit
[Vcc]
24V= (24VDC)
[H]
HIGH
[L]
LOW
[GND]
gnd
The heat pump and indoor unit are connected to each other by a
communication line, the CAN-BUS [24VDC, class III (SELV)].
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
can be used.
The maximum permissible cable length is 30 m.
Electrical connection
B
0010049010-001
2
21
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