Tank sequence control:
Solar/Expert/t-circ.
adjustment range: 1 ... 60 min
factory setting: 15 min
The controller checks whether the tanks can be loaded
(switch-on difference).
When the priority tank cannot be loaded, the subordinate
tanks are checked. If a subordinate tank can be loaded, it
will be loaded for the “oscillating loading time” (“t-circ.”).
After this period of time, the loading process stops. The
controller monitors the increase in collector temperature.
If it increases by the “collector rise temperature” (
D
T-col)
within the loading break time “t-st”, the elapsed break time
is set to 0. The break time starts again.
As soon as the switch-on condition of the priority tank is
fulfilled, it will be loaded. If the switch-on condition of the
priority tank is not fulfilled, loading of the subordinate tanks
will be continued. If the priority tank reaches its maximum
temperature, oscillating loading will not be carried out.
Loading break time:
Solar/Expert/t-st
adjustment range: 1 ... 60 min
factory setting: 2 min
Collector rise temperature:
Solar/Expert/
D
T-col
adjustment range: 2 ... 20 °Ra
factory setting: 4 °Ra
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Priority logic is used in multi-tank systems only.
If St1, St2, St 3, St4 are set to 1, the tanks with a temperature
difference with respect to the collector are loaded in parallel
as long as their switch-on conditions are fulfilled.
If St1 is set to 1, St2 to 2, St 3 to 3, and St4 to 4 (factory set-
ting) the first tank will be loaded first as long as its switch-
on conditions are fulfilled. When the selected priority tank
reaches its adjusted maximum temperature, the subordinate
tanks will be loaded in numerical order via oscillating loa-
ding: tank 1, then tank 2, then tank 3, then tank 4.
Priority logic and tank sequence control:
Solar/adj. values/priority St1 (...St4)
adjustment range: 1 ... 4
factory setting: 1; 2; 3; 4
Balancing functions:
Solar/Balance values
The controller has integrated registers which record the
following values:
• maximum temperatures
• operating hours of the relays
• operating days since commissioning of the controller
The values can be reset, except for “operating days”.
4.2 Menu: Arrangement
HSE (protection against legionnaires‘ disease):
Arrangement/Options/HSE
selection: “Yes”, “No”
factory setting: “No”
Arrangement/adj. values/t-start
adjustment range: 00:00 ... 00:00
factory setting: 17:00
Arrangement/Expert/Sen-hse
adjustment range: 1 ... 10
factory setting: 2
The HSE-function checks whether the temperature at the
given sensor (Sen-HSE) exceeds 140 °F at certain times for
legionella control.
If 140 °F has not been achieved by the HSE start time, the
HSE relay is energised in order to activate e.g. back-up he-
ating. The HSE start time (t-start) is adjustable.
The relay is switched off once 140 °F is reached at the re-
levant sensor (factory setting 2 - selectable) or at midnight
(reset point).
If the relevant sensor is defective, this function is suspended.
