9
Program 7
S1 S3
min min 2
diff diff 2
S2
max
Required settings :
max … limit TK S2
min … switch-on temp. energy generator 1 S1
min2 … switch-on temp. energy generator 2 S3
diff … energy generator 1 S1 – TK S2
diff2 … energy generator 2 S3 – TK S2
The loading pump function has an additional threshold min2 via sensor S3 and tempera-
ture difference diff2 between S3 and S2. Hence, the system can be switched off via two
energy generators (S1 and/or S3).
Program 8, 9 - Air flap control for an earth collector
Program 8
A = ON
S1 max
A = OFF
S1 min
A = ON
Required settings :
max … upper switch-on threshold S1
min … lower switch-on threshold S1
The output switches when S1 > max or < min. An air/water heat pump thus has a flap for
the airflow from the earth collector above the outside ambient temperature max (regenera-
tion) and below the outside ambient temperature min (heating). S2 and S3 have no function.
Program 9
A = OFF
S1 max
A = ON
S1 min
A = OFF
Required settings :
max … upper limit S1
min … lower limit S1
The output switches when S1 < max and > min. Hence, while program 8 switches above
and below a temperature window, program 9 switches within a temperature window.
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