AC•THOR
®
/ AC•THOR
®
9s Operating instructions, version a0020000 22
for temperature boost backup and not as an extension to the normal control range!
Hot water 1 min switching times
This setting can be selected when the temperature boost backup is "On" under "Hot water 1
temperatures", or when the relay output has been selected.
There are two time windows available to maintain the minimum temperature on the my-PV
temperature sensor. Start and finish can each be defined at full hours. Factory settings suggest
switching times of 5 to 11 pm and 5 to 7 am.
TIP: Restrict the times when the minimum temperature has to be maintained to
mornings and evenings, to increase your own PV consumption through the day!
Start hour and stop hour refer to the same calendar day. If a time window is defined over
midnight, hot water backup will not start!
If start-hour and stop-hour are identical, boost-backup starts one-time until the set-point
temperature is reached.
If the adjusted start-hour is after the stop-hour, hot water backup will not start!
Hot water 1 min weekdays
This setting can be selected when the temperature boost backup is "On" under "Hot water 1
temperatures", or when the relay output has been selected.
You can select the weekdays on which the minimum temperature has to be maintained. In the
factory settings, all weekdays are activated.
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!
M8: Frequency mode
AC•THOR: Hot water with a single-phase heating load
AC•THOR 9s: Hot water with a three-phase heating load
Explanation
In this operating mode, a dump-load in an AC island network is linearly supplied with excess PV
power. The output of the AC•THOR is specified to the unit by a battery inverter through alteration of
the grid frequency via power-grid connection. Wiring for intercommunication is not required!
If an immersion heating element element is used as a dump load, the AC•THOR can optionally also
take over boost backup of the hot water temperature. For this, the my-PV temperature sensor is to
be used.
In this application, the my-PV temperature sensor in the storage tank must in any event be
installed above the immersion heating element to provide a reliable reading!
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