AURATON S03 RT, User Manual

Page: 3 / 24

3
APPLICATION
AURATON S03 RT is intended for automatically switching on and off circula -
tion pumps depending on the temperature. The controller-pump assembly
forces the water to circulate in the central heating system with a coal-fired
boiler or a gas boiler. The controller’s sensor measures the temperature of the
water on the supply side of the CH system. In a CH system with a coal-fired
boiler, the controller switches off the circulation pump after the flame in the
boiler is extinguished. Pumping of water is not recommended when the flame
is extinguished because the air draft into the chimney causes faster cooling of
the water in the boiler faster than in the radiators. The optimum temperature
can be set on the controller’s scale (most often 40 °C).
In a CH system with a gas boiler, the temperature set on the controller must
be lower than the temperature set on the CH boiler. If the temperature is set
on the controller above the dew point, it prevents condensation in the boiler
during the heating of the water in the CH system.
AntyStop system
The AntyStop (AS) system installed in the Auraton S03 RT controller prevents
seizure of the rotor of an unused pump. Also, a built in processor starts the
pump every 14 days for 30 seconds after the heating season is over. In order
for the system to work after the heating season, the controller must be
switched on with the AS function active at all times.