Power Supply - Viessmann BW 30 .CS Series Installation And Service Instructions Manual

Electrical connections
Terminals Analogue inputs and outputs
18X4 External set value
27X5 Temperature sensor, cylinder heating, bottom
28X6 Temperature sensor, flow, heating circuit 1
29X6 Temperature sensor, flow, heating circuit 2
30X6
Temperature sensor, flow, heating circuit 3
22X4 Temperature sensor, DHW, top
22X6 Temperature sensor, DHW, bottom
22X8 Temperature sensor, flow, DHW heating
40X7 Temperature sensor, heat exchanger residual heat, primary inlet
40X8 Temperature sensor, heat exchanger residual heat, primary outlet
25X8 Temperature sensor, flow, external heat source
37X0
Temperature sensor, coolant buffer cylinder, top
37X2 Temperature sensor, coolant buffer cylinder, bottom
37X4 Temperature sensor, flow, coolant buffer cylinder charging
Danger
Incorrectly executed electrical installations can
result in injuries from electrical current and dam-
age to the appliance.
All sensor and signal leads (0-10 V) must be
shielded with copper braiding and have a mini-
mum cross-section of 0.5 mm
Specified lead type: CV

Power supply

Isolators for non-earthed conductors
■ The integral ON/OFF switch must simultaneously
isolate all non-earthed conductors from the mains
with a minimum contact separation of 3 mm.
Danger
Incorrectly executed electrical installations can
result in injuries from electrical current and dam-
age to the appliance.
Connect the power supply and implement all
safety measures (e.g. RCD circuit) in accord-
ance with the following regulations:
■ IEC 60364-4-41
■ VDE regulations
■ Technical connection requirements specified
by the local power supply utility
Danger
The absence of component earthing can lead to
serious injury from electric current if an electrical
fault occurs.
■ Re-establish all earth connections of the heat
pump.
Heat pump and pipework must be grounded
■
to the equipotential bonding of the building.
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Danger
Incorrect core assignment can result in serious
injury and damage to the appliance.
Never interchange cores "L" and "N".
Consult your power supply utility, which may offer dif-
■
ferent supply tariffs for the power circuits.
Observe the technical connection requirements of
the power supply utility.
■ The power-OFF assignment is made via the type of
connection.
In Germany, the power supply can be cut off for up to
3 x 2 hours per day (24 h).
■ The heat pump control unit/PCB must be supplied
with power without being interrupted by the power
supply utility. Tariffs subject to possible shutdown
must not be used here.
Install the power supply of the heat pump control unit
and the cable for the power-OFF signal in accord-
ance with the separate "Connection and wiring dia-
gram".
■ Protect the power cable to the heat pump control unit
with a fuse of max. 25 A.
Installation sequence
Note
0-10 V
Pt 1000
Pt 1000
Pt 1000
Pt 1000
Pt 1000
Pt 1000
Pt 1000
Pt 1000
Pt 1000
r-U
Pt 1000
Pt 1000
Pt 1000
Pt 1000
37