6
Hydraulic unit WHSH HE 24V (0-10 V) L
Installation and Operating Instructions
EN
3 .4 Flow and return line conversion
With regard to the hydraulic unit, the flow line is on the right side when delivered.
Depending on the setup of the heating system, it is necessary to switch the flow and return line.
In order to switch the flow and return lines, the following three steps must be taken:
− Conversion of both lines
− Conversion of actuator
− Conversion of the 3-way mixing valve
These steps are described in detail in the following three sections .
3 .4 .1 Flow and return line conversion
Remove fitting group from the thermal insulation and remove the wall bracket.
Loosen union nuts on the 3-way mixing valve with a spanner SW66 and remove the mixer tap. Switch pump line and
flange pipe line (Fig. 8, Fig. 9).
Remove clamping part (9) from the lower shell, turn 180° and replace in the lower shell (Fig. 10).
3 .5 Actuator conversion
Actuator for mechanical operation of the
3-way mixing valve
1. Operating switch automatic/manual operation
2. Connection cable Power supply
3. Adapter for fixing to mixer plug
4. Flat-head screw
5. Serrated washer
6. Rotary handle with display function
7. Viewing panel red/blue
8. Hollow shaft
9. Rotation lock
Fig .8
Fig .10
Fig .9
9
