en
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Installation
Indications,
functions and options
Messages
Commissioning
Operation and function
If priority PRIO 0 is adjusted and the switch-on conditions for both stores are
fulfilled, the stores are loaded in parallel (Arr 6) or in store sequence control (Arr
4, 5) respectively, beginning with the store with the lowest temperature. In store
sequence control, solar loading will switch from one store to the other in steps of
5 K [10 °Ra] temperature difference between the stores.
If PRIO 1 / 2 is adjusted, store sequence control will be activated (see below) with
the corresponding store as the priority store.
Note
If the priority is set to PRIO Su 1 or Su 2, solar loading of the subordi-
nate store will be stopped at once if the temperature in the priority store
(store 1 for Su 1, store 2 for Su 2) falls below the adjusted maximum tem-
perature. If, in that case, the temperature difference between the priority
store and the collector is not sufficiently high, solar loading will be stopped
completely.
Spreaded loading temperature difference
(only available if PRIO is set to SE 1 or SE 2)
DTSE
Temperature difference spreaded loading
Adjustment range: 20 … 90 K [40 … 160 °Ra]
Factory setting: 40 K [70 °Ra]
Store sequence control (only available if priority is set to PRIO SE 1, SE 2, 1 or 2)
tLB
Loading break store sequence control
Adjustment range: 1 … 30 min
Factory setting: 2 min
tRUN
Circulation runtime store sequence control
Adjustment range: 1 … 30 min
Factory setting: 15 min
Store sequence control will be activated when PRIO is set to SE 1, SE 2, 1 or 2.
If the priority store cannot be loaded, the subordinate store will be checked. If use-
ful heat can be added to the subordinate store, it will be loaded for the circulation
time (tRUN – factory setting 15 min). After this, the loading process stops and the
controller monitors the increase in collector temperature during the loading break
time tLB. If it increases by 2 K [4° Ra], the break time timer starts again to allow
the collector to gain more heat. If the collector temperature does not increase suf-
ficiently, the subordinate store will be loaded again for the tRUN runtime as before.
As soon as the switch-on condition of the priority store is fulfilled, it will be loaded.
If the switch-on condition of the priority store is not fulfilled, loading of the subor-
dinate store will be continued. If the priority store reaches its maximum tempera-
ture, store sequence control will not be carried out.
If store sequence control is active and the system switches to load the priority
store, the parameter tLB also acts as a stabilisation time, during which the switch-
off condition DT F is ignored while the system operation is stabilising.
