39742.892 | 11.50
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9.3.8 Interval
Periodically switches the solar circuit pump on and off in order to meas-
ure the actual collector temperature. The delay between 2 switch-on
operations and the switch-on duration can be set. Applications:
• Collector types where the mechanical construction prevents the
temperature from being measured at a suitable place
• Unsuitable position of the temperature sensor on the collector
The function can be time restricted to prevent unnecessary periodic
operation at night.
Display Characteristic min. max.
Factory
setting
Activation on, oFF
oFF
Time window start/end 00:00 23:59 08:00/19:00
Wait time 1 min 999 min 15 min
Switch-on duration 3 s 999 s 5 s
9.3.9 Stagnation reduction
Delays the end of the storage tank's loading phase in order to reduce, or
even to avoid, the system standstill (stagnation) times at high tem-
peratures. To do this, the pump is stopped repeatedly, and only briefly
switched on again at high collector temperatures. Since the efficiency
drops heavily at high collector temperatures, the loading takes longer
and possible stagnation occurs later.
Note
This function cannot be activated in systems with swimming
pools.
Display Characteristic min. max.
Factory
setting
Activation on, oFF
oFF
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