Cooling Function - Buderus Logamatic SC40 Installation And Servicing Instructions

Service level menu (for qualified heating engineers only)

7.5.22 Cooling function

Menu: Service > Settings > Cooling function
The cooling function minimises the solar thermal system stagnation periods. The solar thermal sys-
tem is run at a high temperature to maximise piping heat loss.
If the cylinder temperature is 9 K (°C) below the cylinder maximum temperature (in systems with two
heat consumers always that of the low-priority cylinder) the solar system pump is switched off. If the
collector temperature is 10 K (°C) below the collector maximum temperature, the solar system pump
starts up and runs until the collector has cooled down by 10 K (°C). The solar system pump then
switches off and the collector heats up again. When the cylinder maximum temperature is reached,
the solar system pump switches off and the cooling function is stopped.
The cooling function can not be activated if the evacuated tube collector option is ac-
tive or a configuration diagram including a swimming pool has been selected.
Systems with a domestic hot water cylinder that is charged by an external heat ex-
changer: in "hard water" areas, increased levels of limescale formation can occur in
the heat exchanger secondary system.
Setting range
Yes/No
Tab. 35
Logamatic SC40 - Technical specifications are subject to change without prior notice.
Default setting
No
7
New setting
65