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9.3 Temperature
sensor
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Fit the sensors for the control units used according to the re-
levant installation instructions (for sensor wells, see chapter
"Specification / Dimensions and connections").
f
Route the connecting cable/lead to the heat pump control
unit.
10. Commissioning
10.1 Commissioning
f
Open a downstream draw-off point until the appliance has
filled up and the pipes are free of air.
f
Vent the internal indirect coil.
f
Fit the accessories and check them if necessary.
f
Check the function of the safety valve.
f
Check that the DHW temperature on the heat pump control
unit is displayed correctly.
10.1.1 Appliance handover
f
Explain the appliance function to users and familiarise them
with its operation.
f
Make users aware of potential dangers, especially the risk of
scalding.
f
Hand over these instructions.
10.2 Returning into use
See chapter "Commissioning".
11. Taking the appliance out of use
f
If necessary, disconnect any accessories installed from the
mains at the MCB/fuse in the fuse box.
f
Drain the appliance. See chapter "Maintenance / Draining the
appliance".
12. Troubleshooting
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The safety valve drips when
the heating is switched off.
The valve seat is conta-
minated.
Clean the valve seat.
13. Maintenance
DANGER 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
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
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
checks should be carried out.
13.3 Draining the appliance
DANGER Scalding
Hot water may escape during the draining process.
f
Close the shut-off valve in the cold water line.
f
Open the hot water taps on all draw-off points.
f
Drain the appliance via the drain valve.
13.4 Cleaning and descaling the appliance
26
_0
3
_0
1
_0
8
47
1
1
1 Threaded lift-off holes
f
Use the threaded lift-off holes to release the flange plate
from the flange connector.
For the torque of the flange screws, see chapter "Specification /
Dimensions and connections".
f
Never use descaling pumps.
f
Never treat the cylinder surface or the protective anode with
descaling agents.