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Commissioning (qualified contractors)
D0000116133
1 Vent plug
u Remove the cap from the connection.
u Unscrew the plug using a socket spanner (size 32).
u Install the threaded immersion heater.
5.4
Heating water connection
u NOTICE: Foreign bodies, such as welding pearls, rust or
sealing material, can impair the operational reliability of
the appliance. Flush the pipework thoroughly.
u Install the pipes carrying heating water (see chapter Dimen-
sions and connections [} 8] ).
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u Connect the hydraulic connections with flat gaskets.
5.4.1 Oxygen diffusion
Heating circuit oxygen diffusion
If oxygen gets into the heating system, steel parts may become
corroded, e.g. the indirect coil in the DHW cylinder or the buffer
cylinder. The products of corrosion (e.g. rusty sludge) can settle
in the heating system components. This may cause the pipe
cross-sections to narrow, leading to a lower output.
u Use oxygen diffusion-proof pipes and hoses (e.g. multi-
layer composite pipes).
u If you have an open vented heating system, separate the
heating circuit from the buffer cylinder. For example, you
could use a plate heat exchanger for this.
6
| STH C Plus
1
2
2 Cap
5.4.2 Fitting the drain valve
u To facilitate maintenance work on the appliance, fit a drain
valve (not included in standard delivery) in the lowest pipe
line.
5.4.3 Installing the air vent valve
u Before filling the appliance, install an air vent valve.
5.5
Sensor installation
Standard delivery of the WPM heat pump manager includes the
temperature sensor.
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u Press the spring downwards onto the sensor. The spring is
used for fixing the sensor in the sensor pocket.
u Apply heat conducting paste to the sensor.
u Push the sensor into the sensor pocket.
u Route the connecting cable to the WPM heat pump man-
ager.
u Make the electrical connection for the sensor.
6
Commissioning (qualified contract-
ors)
u If no safety valve is installed in the heat pump, install a
safety valve on site.
u Fill the appliance.
u During filling, ensure that the appliance is vented continu-
ously.
u Fit accessories as required.
u Check the functionality of the accessories and the appliance.
u Check the hydraulic connections for leaks.
u Check the safety valve for correct function.
u Check that the actual buffer temperature is correctly dis-
played on the WPM heat pump manager.
u Commission the heat generator and any installed electrical
accessories. Observe the relevant operating and installation
instructions.
7
Cleaning
u Never use abrasive or corrosive cleaning agents. A damp
cloth is sufficient for cleaning the appliance.
8
Maintenance
u Have the function of the technical safety components and
electrical safety of the fitted accessories regularly checked
by a qualified contractor.
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