37
Terminals
Sensor
Type
25X6
Output demand, external heat source
0-10 V
22X2
Variable speed control, circulation
pump for DHW heating
0-10 V
27X5
Temperature sensor, cylinder heating,
bottom
Pt 1000 (PTC)
28X6
Flow temperature sensor
Heating circuit 1
Pt 1000 (PTC)
29X6
Flow temperature sensor
Heating circuit 2
Pt 1000 (PTC)
30X6
Flow temperature sensor
Heating circuit 3
Pt 1000 (PTC)
22X4
Temperature sensor, DHW, top
Pt 1000 (PTC)
22X6
Temperature sensor, DHW, bottom
Pt 1000 (PTC)
22X8
Flow temperature sensor, DHW heat-
ing
Pt 1000 (PTC)
40X7
Temperature sensor, heat exchanger
residual heat, brine inlet
Pt 1000 (PTC)
40X8
Temperature sensor, heat exchanger
residual heat, brine outlet
Pt 1000 (PTC)
25X8
Flow temperature sensor
External heat source
Pt 1000 (PTC)
37X0
Temperature sensor, cylinder, cold wa-
ter top
Pt 1000 (PTC)
37X2
Temperature sensor, cylinder, cold wa-
ter bottom
Pt 1000 (PTC)
37X4
Flow temperature sensor, heating
Cylinder, cold water
Pt 1000 (PTC)
Danger
Incorrectly executed electrical installations can
result in injuries from electrical current and in
appliance damage.
All sensor leads and 0-10 V signal leads must
be shielded with copper braiding and have a
minimum cross-section of 0.5 mm².
Specified lead type: CV.
Power supply
Isolators for non-earthed conductors
■
The integral mains isolator must simultaneously iso-
late 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 in
appliance damage.
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
Installation sequence
Overview of electrical connections
(cont.)
5549 991 GB
Installation
Summary of Contents for 301.BS090
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