Sensor Types - Sonnenkraft SKSC2HE Manual Del Usuario

1.3. Sensor types

High-precision platin sensors type PT1000 are
used for the controller.
The arrangement of the sensors is of great im-
portance to the total efficiency of the regulator.
The collector temperature should be measured
in the middle part of the collector. In stores with
integral heat exchanger, the sensor must be di-
rectly mounted in the middle part of the heat
exchanger. When using external heat exchang-
ers, the sensor must be fixed at the bottom of
the store. The sensor types SKSPT1000KL and
SKSPT1000S have the same electrical features
and are available in the same models, they only
differ in the connecting cable:
SKSPT1000KL : collector sensor
SKSPT1000S : reference sensor (store sensor)
36
SKSPT1000KL: 1,5 m weather- and temper-
ature resistant silicone cable for temperatures
between -50 °C ... +180 °C, mostly used for col-
lectors.
SKSPT1000S: 2,5 m PVC cable for tempertures
between -5 °C ... +80 °C, mostly used for stores.
For vacuum collectors SKSPT1000V sensors
have to be used!
Make sure that all electrical works are carried
out according to the relevant local and IEE-reg-
ulations. The sensor cables carry low voltages
and they must not run together in a cable con-
duit with cables carrying higher voltages than
50 Volts. When using longer cables or cable con-
duits, please use shielded cables. The sensor
cables can be lengthened up to 100 m, but the
cross section must be 1,5 mm² (or 0,75 mm²
up to a cable length of 50m); screened cables
should be used preferably. The sensors must not
be in direct contact with water, please always
use immersion sleeves.
Note:
In order to avoid overvoltage damage at the col-
lector (e.g. by lightening), it is highly recommen-
dend to use the overvoltage protection SKSRÜS.
GB