4
KS
BS
pump
BS
pump
KS
Solar thermal system
function switch in position
S+ (solar)
The pump runs when sensor
KS
has a temperature of
diff
higher than sensor
BS
and
BS
has not exceeded the threshold
max
.
Pump = KS > (BS + diff) & BS < max
Collector excess temperature:
if the collector temperature climbs above 130°C, the pump
is switched off and only released again, if the temperature falls below 110°C.
During the excess temperature shutoff, the two top LEDs of the collector display flash.
Tank load from boiler
function switch on position
L+ (feed pump)
The pump runs when
sensor KS
is greater than the threshold
max
(here used as "min") and
sensor KS
is greater than
BS
by the difference
diff
.
Pump = KS > max & KS > (BS + diff)
The difference function:
The output only switches the pump when the temperature of the collector or the boiler is
greater than the temperature of the boiler by the set difference
diff
.
The thermostat function:
Solar S: If the
tank temperature
exceeds the set
maximum threshold
, the pump is
switched off regardless of the temperature of the collector (protection from calcification).
Feed pump L
: If the
boiler temperature
falls below the minimum threshold, the pump is
switched off (protection from sooting).
