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10.3.11 Holiday – recooling
Attempts to reduce, or even to avoid, the system standstill (stagnation)
times at high temperatures. To do this, at night the storage tank – or the
second-priority storage tank if 2 storage tanks are present – is charged
as far as possible to the set minimum temperature, if the storage tank
temperature during the day was 20 F below the set maximum tempera-
ture.
Stagnation occurs when not enough hot water is removed from the
system during an absence (holiday).
Notes
The following applies to this function:
• Only activate if you intend to be absent for an extended period.
• Deactivate this after returning from a holiday in order to avoid an
unnecessary waste of energy via the collector circuit.
• This function cannot be activated in systems with swimming pools.
• This function cannot be active at the same time as the drainback
function.
Display Characteristic min. max.
Factory
setting
Activation on, oFF
oFF
Minimum storage tank tempera-
ture:
32 °F 200 °F 95 °F
10.3.12 Active cooling
Switches an additional cooler into the solar circuit when one of the fol-
lowing conditions is satisfied:
• The temperature of the storage tank – or of the second-priority
storage tank in the case of 2 storage tanks – lies 20 F below the set
maximum temperature.
• Holiday recooling is performed at night.
Application examples: areas with strong solar irradiation, avoidance of
stagnation.
Note
This function cannot be active at the same time as the drainback func-
tion.
Display Characteristic min. max.
Factory
setting
Activation on, oFF
oFF
Output (switching-in of additional
cooler)
free output R1/R2/R
S
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