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8.3.3 Fitting the water connection and the safety assembly
Damage to the appliance and environment
Carry out all water connection and installation work in
accordance with regulations.
f Flush the line thoroughly.
f Observe the information in the installation instructions of the
safety assembly.
f Connect the DHW outlet and the cold water inlet lines with
the safety assembly. Bear in mind that, depending on the
static pressure, you may also need a pressure reducing valve.
f Size the drain so that water can drain off unimpeded when
the safety valve is fully opened. The blow-off aperture of the
safety valve must remain open towards the atmosphere.
f Fit the blow-off line of the safety assembly with a constant
slope.
8.3.4 Inserting the temperature sensors
f Apply heat conducting paste to the temperature sensors.
f Insert the temperature sensors as far as they will go into the
connections for HP return sensor and HP DHW sensor (see
chapter „Specification / Dimensions and connections").
9.
Commissioning
f Open a downstream draw-off point until the appliance has
filled up and the pipes are free of air.
f Vent the indirect coils after filling the heat pump system.
f Fit the accessories and check them if necessary.
f Check the function of the safety valve.
10. Taking the appliance out of use
f Disconnect the appliance from the mains at the MCB/fuse in
the fuse box.
f Drain the appliance. See chapter "Maintenance / Draining the
appliance".
11. Recommissioning
See chapter "Commissioning".
12. 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.
13. Troubleshooting
13.1 Fault table
The safety valve drips
The valve seat is conta-
when the heating is swit-
minated.
ched off.
14. 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".
14.1 Checking the safety valve
f Regularly vent the safety valve on the safety assembly until a
full water jet is discharged.
14.2 Draining the appliance
DANGER Scalding
Hot water may escape during the draining process.
If the heating system is not in operation and the installation lo-
cation is not protected against frost, the appliance and connected
system must be emptied.
f For draining the appliance, remove the thermal insulation
around the drain connector.
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 of the safety
assembly.
f
Clean the valve seat.
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