AC•THOR
®
/ AC•THOR
®
9s Operating instructions, version a0020806 16
Legionella program
For ensuring drinking water hygiene, a period can be specified by the end of which a set minimum
temperature must again be reached after the last time it was reached. The number of days in this
period can be set between 1 and 14. A time at which the legionella program is to start can also be
specified. Factory settings are number of days 7, starting time 8 pm, temperature is 60 °C, the
legionella program is "Off".
The upper immersion heating element is here supplied with maximum power.
Boost output (only with AC•THOR 9s)
If boost backup is activated for AC•THOR 9s, it is possible to specify which load outputs are to be
used for this purpose. All three outputs are activated at the factory.
TIP: If not all three outputs of a three-phase heating element are used for boosting,
control power is still available in case of excess energy!
AC•THOR: Hot water 6kW
AC•THOR 9s: Hot water 18kW
The AC•THOR 9s assumes two three-phase loads, three single-phase loads are not
permitted in this operating mode!
TIP: In this operating mode, it is strongly recommended that both the AC•THOR
control and the power measurement at the switched load are carried out with a my-
PV Meter!
In this operating mode, two heating elements are supplied with excess PV power in a water storage
tank. One of them be regulated continuously variable, the other cuts in as soon as sufficient surplus
PV is available. When this occurs, the first heater starts again from 0 with the power regulation. The
total range of regulation is thus extended.
Both heaters have to be fitted with a bimetal thermostat to cut out when the set temperature is
reached. The my-PV temperature sensor is to be used.
There are two operating modes:
A fixed threshold value can be set from which the second load is switched on. This threshold value is
set in the web interface. See chapter "Special setting options in the web interface".
Alternatively, a my-PV Meter can be used to measure the power of the switched load. See chapter
"Load measurement at relays with my-PV Meter (recommended)".
The power switched at the relay must not be greater than the power that can be controlled by
the AC•THOR. Otherwise, unstable control behavior would be expected. Error 106 is displayed!
Third party control types may not be able to command the power up to 6kW / 18 kW!
If no my-PV Meter is used for power measurement at the switched load, the power display of
the AC•THOR and the energy recording of the data logger cannot take this consumption into
account!
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