30
13.9 Connection of temperature
sensors
Regulator works with sensors -type: CT4 and
CT2S only. Use of other sensors is not
allowed.
Sensor wires may be extended using wires of
cross-section area not less than 0.5 mm
2
.
Total length of wires of each sensor should
not exceed 15 m.
Insert boiler temperature sensor into
thermometer well fastened to boiler shell.
Fasten feeder temperature sensor to the
surface of feeder screw tube. Insert
temperature sensor of HUW container into
thermometer well welded to the container.
The best way to mount mixer temperature
sensor is to insert it into a sleeve located in
the stream of flowing water, however, it is
also allowed to fasten the sensor in a contact
manner provided that the sensor and the
pipe are properly heat-insulated.
Sensors shall be protected against
loosening from surfaces they are
mounted to.
Make sure thermal contact between the
sensors and the surface which temperature is
measured is good. Apply thermal paste to
improve the contact. Pouring sensors with oil
or water is not allowed.
Sensor wires should be separated from
power supply wires. Otherwise, temperature
indications may be erroneous. Min. distance
between these wires should be 10 cm.
Do not allow sensor wires to contact hot
parts of the boiler and heating system. Wires
of temperature sensors are heat resistant to
the temperature not exceeding 100°C.
13.10 Connection of weather sensor
Regulator works with weather sensors -type:
CT4-P only. Fasten the weather sensor on
the coldest wall of the building - usually it is
a roofed area of north wall. The sensor
should not be exposed to direct sunlight or
rainfall. Install the sensor at the height of
min. 2 m above ground level in the location
away from windows, chimneys and other
heat sources, which may interfere
temperature measurements (min.
distance:1.5 m).
Use cable of wire with cross section area of
min. 0.5 mm
2
and length of up-to 25 m to
connect the sensor. Wire polarization is
irrelevant. Connect other cable end to
regulator terminals as shown in Fig. 18.
Bolt the sensor to the wall using erection
bolts. Holes for bolts are accessible upon
removal of sensor housing lid.
Fig. 20 Connection of weather sensor CT4-P.
13.11 Testing of temperature sensors
CT4/CT4-P/CT2S temperature sensors may
be tested by measuring their resistance at
the given temperature. In case of significant
differences between the measured resistance
and the values indicated in the table below -
replace the sensor.
Regulator works with exhaust temperature
sensors - type: CT2S only. To test CT2S
sensor use very accurate multimeter –
otherwise, only very rough testing is
possible.
To Next Page
Loading...
Need help?
General
