Diagram 16
10
Program 17:
Pump-valve system between
TK1
und
TK2
.
TK1
and
TK2
are fed by a com-
mon pump
A1
and a three-way valve
A2
. The speed control (if activated) only operated when
filling tank 1.
A1
... common pump
A2
... valve (A2/S receives power when filling tank
TK2
)
Program 18:
Pump-valve system between
TK1
und
TK3
.
A1
... common pump
A3
... valve (A3/S receives power when filling tank
TK3
)
Program 19:
A common pump feeds all
three
tanks. Valve
A3
switches between
TK2
and
TK3
and – in series – valve
A2
between
TK1
and
TK2
. I.e. if both valves are free from ten-
sion,
TK1
will be fed. The speed control (if activated) only operated when filling tank 1.
A1
... common pump
A2
... valve (A2/S receives power when filling tank
TK2
)
A3
... valve (A3/S receives power when filling tank
TK3
)
If there is an active priority allocation
, the two valves
A2
and
A3
are never switched on
simultaneously: when filling into tank 2, only pump
A1
and valve
A2
are switched on, when
filling into tank 3, only pump
A1
and valve
A3
are switched on.
All pr4:
A4
is only a signal contact which shows, that all tanks have reached their
max
-thresholds.
All pr8:
If all tanks have reached their maximum temperature due to the solar
power system, tank
TK2
will be fed regardless of
max2
.