8
Installation
6 720 612 217 (05.03)
3.2 Installing the tempera-
ture sensors
To install immersion sensors and
:
B Insert temperature sensor in the
pocket on the solar panel flow side
and screw in place. The sensor and
lead must be inserted to a depth of
170 mm into the panel and screwed
in tightly.
B Insert temperature sensor in the
lower pocket on the hot water stor-
age tank and fix in place.
3.3 Electrical connections
For details of electrical connections,
refer to Figs. 8 to 10 on page 18.
B Sensor leads can be up to 100 m
long. 1.5 m is supplied.
B Wiring run lengths and cross-sec-
tional areas for low-voltage wiring:
B For the 230 V power supply use
general duty, 300-500 V PVC
coated, 0.75 mm
2
electrical cable.
B Route all low-voltage leads sepa-
rately from 230 V or 400 V cables in
order to avoid inductive interference
(minimum separation 100 mm).
B If there is a likelihood of external
inductive interference, e.g. from
high-power cables, tram power
lines, electricity substations, radio
and television equipment, amateur
radio transmitters, microwaves or
the like, shielded low-voltage leads
should be used.
B To ensure the programmer complies
with the IP 20 Ingress Protection rat-
ing:
– Only break open as many cable
exits as absolutely necessary.
– Only make the holes just big
enough for the cables used.
– Cable exits to underneath:
Cut a slot on each side with a suit-
able tool and break off from the
programmer casing (Fig. 8)
or
i
Use only genuine PTC-
type temperature sen-
sors (see Section 1.3).
Danger: risk of elec-
tric shock!
B Before making any
electrical connec-
tions, disconnect the
power supply (230 V
AC) to the heating
system.
Length up to 50 m 0.75 mm
2
Length up to 100 m 1.5 mm
2
Table 3
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