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INSTALLATION
Commissioning
9.3.2 Connection
f Flush the pipework thoroughly.
f
f Observe the information in the installation instructions of the
f
safety assembly.
f Connect the DHW outlet and the cold water inlet lines with
f
the safety assembly. Please note that, depending on the stat-
ic pressure, you may also need a pressure reducing valve.
f Size the drain so that water can drain off unimpeded when
f
the safety valve is fully opened. The safety valve discharge
aperture must remain open to the atmosphere.
f Install the discharge pipe of the safety assembly with a con-
f
stant slope.
9.4
Solar and heating circuit sensors
f Fit the sensors for the control units used according to the rel-
f
evant installation instructions (for sensor wells, see chapter
"Specification / Dimensions and connections").
f Route the connecting lead to the solar or heating circuit con-
f
trol unit.
10. Commissioning
10.1 Initial start-up
f Open a downstream draw-off point until the appliance has
f
filled up and the pipes are free of air.
f Vent the internal indirect coil.
f
f Check the function of the solar thermal system.
f
f Fit the accessories and check them if necessary.
f
f Check the function of the safety valve.
f
f Check that the DHW temperature on the heat pump control
f
unit is displayed correctly.
10.1.1 Appliance handover
f Explain the appliance function to users and familiarise them
f
with its operation.
f Make users aware of potential dangers, especially the risk of
f
scalding.
f Hand over these instructions.
f
10.2 Recommissioning
See chapter "Initial start-up".
11. Shutting down the system
f If necessary, disconnect any accessories installed from the
f
mains at the MCB/fuse in the fuse box.
f Drain the appliance. See chapter "Maintenance / Draining the
f
appliance".
12. Troubleshooting
Fault
The safety valve drips when
heating is switched off.
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Cause
Remedy
The valve seat is con-
Clean the valve seat.
taminated.
13. Maintenance
WARNING Electrocution
Carry out all electrical connection and installation work
in accordance with relevant regulations.
If you need to drain the appliance, observe chapter "Draining the
appliance".
13.1 Checking the safety valve
f Regularly vent the safety valve on the safety assembly until a
f
full water jet is discharged.
13.2 Checking / replacing the protective anode
f Check the protective anode after the first 2 years of use and
f
replace if necessary. For this, observe the maximum tran-
sient resistance 0.3 Ω between the protective anode and the
cylinder.
f Afterwards determine the time intervals at which further
f
checks should be carried out.
13.3 Draining the appliance
WARNING Burns
Hot water may escape during the draining process.
f Close the shut-off valve in the cold water supply line.
f
f Open the hot water taps on all draw-off points.
f
f Drain the appliance via the drain valve.
f
13.4 Cleaning and descaling the appliance
For the torque of the flange screws, see chapter "Specification /
Dimensions and connections".
f Never use descaling pumps.
f
f Never treat the cylinder surface or the protective anode with
f
descaling agents.
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11.10.2017 07:40:33
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