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INSTALLATION
Commissioning
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 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
Cause
The safety valve drips when
The valve seat is con-
heating is switched off.
taminated.
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13. Maintenance
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
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
Remedy
For the torque of the flange screws, see chapter "Specification /
Clean the valve seat.
Dimensions and connections".
f Never use descaling pumps.
f
f Never treat the cylinder surface or the protective anode with
f
descaling agents.
WARNING Electrocution
Carry out all electrical connection and installation work
in accordance with relevant regulations.
WARNING Burns
Hot water may escape during the draining process.
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