COMMISSIONING
Connecting external components
6 | WPM www.stiebel-eltron.com
5. Connecting external components
WARNING Electrocution
Carry out all electrical connection and installation work
in accordance with national and regional regulations.
WARNING Electrocution
Isolate the heat pump from the power supply when
carrying out any work.
WARNING Electrocution
Only components that operate with safety extra low
voltage (SELV) and that ensure secure separation from
the mains voltage supply may be connected to the low
voltage terminals of the appliance.
Connecting other components can make parts of the ap-
pliance and connected components live.
Only use components which have been approved by
us.
Note
In conjunction with the WPM heat pump manager, use
the HSM mixer servomotor.
5.1 Sensor installation
Connect all of the required sensors before commissioning the
appliance.
5.1.1 AF PT outside temperature sensor
The temperature sensors have a significant influence on the func-
tion of your heating system. Therefore ensure sensors are correctly
positioned and well insulated.
Install the outside temperature sensor on a north or north-eastern
wall. Minimum clearances: 2.5 m above the ground, and 1 m to
the side of windows and doors. The outside temperature sensor
should be freely exposed to the elements but not placed in direct
sunlight. Never mount the outside temperature sensor above win-
dows, doors or air ducts.
Installation:
Pierce the cable grommet at the appropriate place using a
pointed object.
Insert the cable grommet into the recess on the sensor
retainer.
Pass a lead through the cable grommet.
Connect the lead to the terminal.
Tighten the screws on the terminal.
Connect the connecting cable to sensor terminal X1.3.
Press the sensor retainer into the sensor enclosure until it
clicks audibly into place.
Secure the sensor enclosure to the wall using a screw and
rawl plug.
5.1.2 TAF PT immersion/contact sensor
Installation as contact sensor
D0000070237
Clean the pipe.
Note
The recesses on the retaining clip are of different sizes.
Press the smaller recess on the retaining clip into one of the
notches on the sensor.
Press the larger recess of the retaining clip onto the sensor.
Apply heat conducting paste to the sensor.
Secure the sensor with the retaining clip and the cable tie.
Installation as an immersion sensor
D0000071342
The immersion sensor is required for the sensor well in the buffer
cylinder.
Press the spring downwards. The spring is used for fixing the
sensor in the sensor well.
Apply heat conducting paste to the sensor.
Push the sensor into the sensor well.
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