SATK20 & SATK30
10
Operating Cycles SATK20 Low and Medium Temperature
Domestic water generation: This cycle always takes priority
over the heating cycle.
When a tap or shower is turned on (detected by the domestic
water flow meter) the DHW cycle is activated, the controller
pilots the modulating valve opening so as to adjust the
temperature detected by the domestic water probe to the
selected set point value.
When the tap or shower is turned off, the modulating valve is
fully closed.
The active domestic water cycle is signalled by the yellow DHW
LED which comes on.
The domestic water temperature set point can be set using
trimmer P1 and shown on the display.
Heating cycle: Set point regulation
When space heating is requested by the room thermostat, the
circulation pump is powered while the modulating valve is
opened gradually until the set point temperature is reached.
At the end of the heating cycle, the circulation pump comes to
a stop and the modulating valve is closed.
The active heating cycle is signalled by the yellow CH LED
which comes on.
The heating cycle temperature set point can be set using
trimmer P2 and shown on the display.
Under floor heating function: SATK20103 - LOW temperature
This cycle aids the drying of the underfloor heating screed at
low temperatures. This function can only be activated and
executed if there are no faults
It can be activated by pressing and holding the RESET button
for 8 seconds.
The yellow CH LED blinks while the under floor heating drying
function is in operation.
The function has a duration of 240 hours, and is carried out by
simulating a request to run in heating mode starting from a set
point of 25°˚C and rising in regular intervals to a temperature
of 45˚C.
Once the maximum set point has been reached, the function is
executed, following the same procedures, in reverse (from the
maximum set point to the minimum set point).
This function has priority over heating and hot water cycles,
and can be suspended at any time by pressing and holding the
RESET button for 8 seconds.
Optional functions
- to activate/deactivate the optional
functions the electric power supply must always be turned off.
Domestic water generation: DHW preheating function
The function is enabled by setting dip switch 5 to the ON
position.
During periods when the domestic water cycle is not used, if
the DHW probe detects a temperature 10°C below the SET
value, the controller partially opens the domestic water
modulating valve for the time required (max. 5 mins) to bring
the temperature detected up to a value 5˚C below the set point
value.
Operating Cycles SATK20
5
ON
48
25
8 seconds
48
P2
P1
60
P2
P1
