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Antifreeze function
The antifreeze function activates the loading circuit between the collector and
the store when the collector temperature falls below the adjusted temperature
CFRO. This will protect the uid against freezing or coagulating. If CFRF is ex-
ceeded, the solar pump will be switched off again.
The antifreeze function will be suppressed if the store temperature of the selected
store falls below 5 °C. In 2-store systems, the function will switch to the second
store, in systems with store loading in layers, it will switch to the upper store zone.
If the temperature of the second store (or of the upper store zone respectively)
also falls below 5 °C, the system will be switched off.
Note:
In systems with east- / west collectors, the antifreeze function will work
on both collector elds.
Note:
Since this function uses the limited heat quantity of the store, the anti-
freeze function should be used in regions with few days of temperatures
around the freezing point.
OCFR
Antifreeze function
Selection: ON / OFF
Factory setting: OFF
CFRO
Antifreeze temperature on
Adjustment range: -40 … +8 °C
Factory setting: 4 °C
CFRF
Antifreeze temperature off
Adjustment range: -39 … +9 °C
Factory setting: 5 °C
FRPST
Store selection
Selection: 1, 2
Factory setting: 1
in 2-store systems only
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PRIO
Priority logic
Adjustment range: 0, 1, 2, Su1, Su2
Factory setting: 1
Factory setting: 2 (Store loading
in layers)
LLOGI 6
PUSH
6
Priority logic
Priority logic can be used in 2-store systems or systems with store loading in layers
only and determines how the heat is divided between the stores.
Different types of priority logic are adjustable:
• store sequence control (1 and 2)
• successive loading (Su 1 and Su 2)
• parallel loading (0)
1. If PRIO 1 or 2 is adjusted, the corresponding store (1 = store 1 / store top;
2 = store 2 / store base) will be loaded with priority if its switch-on conditions
are fullled and if it is not blocked. If the priority store is not blocked but its
switch-on conditions are not fullled, the store sequence control starts provided
that the switch-on conditions of the subordinate store are fullled. If a subordi-
nate store can be loaded, it will be loaded for the oscillating loading time tRUN.
After the loading time has ended, the pump is switched off for the loading break
tLB. If during this time the priority store can be loaded, it will be loaded. If the
priority store has reached its maximum temperature, the subordinate store will
be loaded up to its maximum temperature without store sequence control.
tRUN
Circulation runtime
Adjustment range: 1 … 30 min
Factory setting: 15 min
tLB
Loading break time
Adjustment range: 1 … 30 min
Factory setting: 2 min
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