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16 HIU2-IM-DE-W-UK-04-2021-Rev7 | Part no. 10078860
EN ENGLISH
7. Mount the flow temperature sensor to the pipeline.
For HIU2 HKM: the pre-installed temperature sensor of
the actuator must be installed below the heating pump
of the flow heating circuit. The enclosed bracket, spring
and thermally conductive paste should be used herewith.
For more information, see the instructions for the actuator
including controller.
8. Change of target temperature.
In order to change the target flow temperature, press the
joystick to the right or to the left (A).
Press the joystick down to confirm new target tempera-
ture (B).
For additional information see the included manual of the
controller.
The presetting of flow temperature sensor of the actuator
with controller is 40 °C.
9. Temperature limiter.
When an underfloor heating is used a temperature limiter
must be installed see DIN EN 1264.
7 Maintenance
Electricity!
Only perform maintenance work on the
HIU 2 if the voltage supply has been
disconnected.
Hot water!
Severe scalding possible.
Do not reach into the hot water when
emptying the HIU2.
Ensure that the HIU 2 has cooled down
before carrying out maintenance, clean-
ing and repair work.
Hot surfaces!
Serious burns possible.
Do not touch the tubings/pipings or com-
ponents during operation.
Ensure that the HIU 2 has cooled down
before carrying out maintenance, clean-
ing and repair work.
Wear heat-resistant safety gloves if it
is necessary to carry out work on hot
components.
The maintenance of the HIU 2 must only be
carried out by trained personnel who have
been authorized by the manufacturer.
16


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