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8.5
Setting the anti-legionella function
Danger!
Risk of death from legionella.
Legionella multiply at temperatures below
60 °C.
▶
Ensure that the end user is familiar with
all of the Anti-legionella measures in order
to comply with the applicable regulations
regarding legionella prevention.
The anti-legionella function heats the water in the product to
a temperature between 60 °C and 70 °C. The default fact-
ory setting for the target temperature is 60 °C and the anti-le-
gionella function is not carried out.
If the target temperature is below 60 °C, you can activate the
anti-legionella function by setting the target temperature to
a value between 60 °C and maximum 70 °C. The automatic
cycle for heating the water is activated at 22:00.
If the target temperature for the cycle is not reached within
24 hours, the cycle stops and then starts again at the next
interval deadline. If an anti-legionella cycle is interrupted by
a time period in which the back-up heater is prevented from
operating (high tariff or time programming), the anti-legion-
ella function will be restarted in the next interval deadline.
▶
Observe the applicable regulations regarding legionella
prevention.
▶
Turn the rotary knob to set the time interval (in days) for
the anti-legionella function. SET TINGS → ANTI -BACT.
→ INST.MENU .
▶
Press the rotary knob.
▶
Select the time interval between two anti-legionella func-
tion charges.
Note
The time interval can be between 0 and 99
days.
▶
Press the rotary knob to confirm the selection.
▶
Press the menu button to return to the original display.
8.6
Selecting the load relief stage
Condition: Cable for low-tariff/high-tariff load relief connected
▶
Select the components that can be used during high-tariff
periods.
–
Heat pump only
–
Heat pump and immersion heater
▶
Turn the rotary knob to set the mode. INST.MENU → SET
TINGS → SHED DING.
◁
0 = No components may operate in the high-tariff
periods
◁
1 = Only the heat pump may operate in the high-tariff
periods
◁
2 = The heat pump and immersion heater may oper-
ate in the high-tariff periods
Note
When using a low-tariff connection, you should
not set any additional time-programming.
74
▶
Press the menu button to return to the original display.
▶
If you are using a high-tariff connection, inform the end
user of the optimal energy use.
8.7
Setting the minimum temperature
You can use the minimum temperature function to prevent
the domestic hot water temperature falling below 38 °C. In
doing so, the back-up heater (immersion heater) supports
the heat pump until a domestic hot water temperature of
43 °C has been reached.
Depending on the parameter selection when setting the load
relief stage, the minimum temperature function may not be
available in high-tariff periods under certain circumstances.
INST.MENU → SET TINGS → T°C MINI
▶
Press the rotary knob.
▶
Turn the rotary knob and select a hot water temperature
of 43 °C.
▶
Press the rotary knob to confirm the selection.
▶
Press the menu button to return to the original display.
8.8
Setting the fan mode
▶
Turn the rotary knob to set the mode INST.MENU SET
TINGS FAN MODE.
◁
1 = Fan operates only when the heat pump is run-
ning. The fan speed automatically adjusts to the heat
pump's requirements.
◁
2 = Fan operates only when the heat pump is run-
ning. The fan runs at maximum speed.
◁
3 = Fan operates only if the heat pump is running or if
the external control system permits this (humidistat)
8.9
Setting the maximum heating time
1.
If you switch off this function, the domestic hot water
cylinder charging time is shortened. INST.MENU →
SET TINGS → MAX. TIME.
2.
Press the rotary knob.
3.
Turn the rotary knob to set the maximum heating time
via the heat pump (Auto /number of hours).
◁
In Auto mode, the product optimises its use of
energy sources (heat pump and back-up heater)
in order to prevent the heating from starting less
than five hours after a low-tariff period has begun.
–
When in the Auto setting, the product only uses
the back-up heater during low-tariff periods and
programmed time periods. The heat pump is
used first. The back-up heater is switched on as
late as possible.
–
If the unit is not connected to the energy supply
company's high-/low-tariff contact, it may not
recognise that the five-hour time period has
started and consequently the Auto function may
not work.
◁
In "Number of hours" mode, the product optimises
its use of energy sources (heat pump and back-up
heater) in order to reach the set temperature within
n hours of the heating starting.
–
The shorter the maximum heating time is set to,
the more often the back-up heater is switched
on and the higher the energy consumption and
consequently the energy costs as a result.
Installation and maintenance instructions 8000015884_00
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