11
C 2. 1 Wiring instructions:
1.
Select the necessary hydraulic variant
(B.6)
.
2. Open the controller as described in C.1
3. Strip the cable by 55 mm max., insert
and fit the cable strain relief. Strip the last
8-9 mm of all the wires (Fig. C.2.1)
4. Open the terminals using a flat
screwdriver (Fig. C.2.1.) and wire the leads
following the diagram.
5. Refit the upper housing part and fasten
with screw.
6. Switch on mains voltage and place cont-
roller in operation.
C.2.1
Installation
C.3
Installing the temperature sensors
The temperature sensor cables must be routed separately from mains voltage
cables.
The controller operates with Pt1000 temperature sensors.
Max. sensor lead length for S1 sensor is 30 m and its cross section at least
0.75 mm
2
. Max. sensor lead length for S2 and S3 is 10 m and its cross section
at least 0.75 mm
2
. Make sure there is no contact resistance in the wiring!
Select the proper location for the sensor where it feels the right temperature.
Use only immersion sensors. Pipe-mounted sensors only in exceptional
cases.
Make sure that the terminals of extension cables and sensors are properly
tightened. Use only immersion or pipe-mounted sensors.
Caution
Warning
The VFS flowmeter shall be connected via a terminal. It is highly
recommended to connect the VFS flowmeter to the solar return – this will
prevent damage by a too high temperature. Check the flow direction.
Caution
