INSTALLATION
Commissioning
EN
GL
ISH
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PHB |
11
11. Commissioning
WARNING Electrocution
Commissioning must only be carried out by a qualified
contractor in accordance with safety regulations.
11.1 Initial start-up
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Open and close all connected draw-off valves several times,
until all air has been purged from the pipework and the
appliance.
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Carry out a tightness check.
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Activate the safety pressure limiter by firmly pressing the
reset button (the appliance is delivered with the safety pres-
sure limiter deactivated).
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Fit the appliance cover, ensuring it clicks into place. Check
that the appliance cover is seated correctly.
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Switch the power supply ON.
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Check the appliance function.
Appliance handover
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Explain the appliance function to users and familiarise them
with how it works.
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Make the user aware of potential dangers, especially the risk
of scalding.
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Hand over these instructions.
11.2 Recommissioning
Vent the appliance and the cold water inlet line (see chapter "Set-
tings").
See chapter "Initial start-up".
12. Appliance shutdown
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Isolate all poles of the appliance from the power supply.
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Drain the appliance (see chapter "Maintenance").
13. Troubleshooting
Fault
Cause
Remedy
The flow rate is too low. The strainer in the appli-
ance is dirty.
Clean the strainer.
Flow meter will not start
despite tap being fully
opened.
The start-up volume
required to start up the
heating output has not
been reached.
Clean the strainer.
The appliance is not
generating hot water de-
spite audible start-up of
the differential pressure
switch.
Safety pressure limiter
(AP 3) has switched the
appliance off for safety
reasons.
Remove the cause of the
fault (e.g. faulty pressure
flush).
Protect the heating sys-
tem against overheating
by opening a draw-off
valve downstream of the
appliance for one minute.
This depressurises and
cools down the heating
system.
Activate the safety
pressure limiter at flow
pressure by pressing the
reset button (see chapter
"Commissioning").
The heating system is
faulty.
Check the heating system
resistor and replace if
required.