37
742.110 | 14.50
EN
Display Characteristic min. max.
Factory
setting
Activation on, oFF
oFF
Pump type AC, HE
1)
AC
Pump characteristics (only HE) bA, bb, C (see p. 14)
–
Sensor input 1 ... 5 –
Switch-on temperature T
on
32 °F 350 °F 70 °F
Switch-off temperature T
off
32 °F 350 °F 70 °F
Time restriction on, oFF
oFF
Time window 1 start/end
Time window 2 start/end
Time window 3 start/end
0:00
0:00
0:00
23:59
23:59
23:59
00:00/00:00
00:00/00:00
00:00/00:00
1)
Notice
Standard pump: Set AC!
High-efficiency pump: Set HE!
External consumer (e.g. 115 V relay): Set AC pump type!
10.3.14 Differential thermostat
T
T
F
unc
SET
off
Switches output R1 on and off as follows – time restricted and depend-
ing on the set temperature difference between 2 selectable sensors:
When the temperature difference exceeds T
diff on
, the output is switched
on until the temperature difference drops below T
diff off
. In addition to
this, the discharging of the heating source can be limited to a particular
temperature range (T
src min.
/T
src max.
) and the loading of the heating target
can be limited to a maximum value(T
sink max.
).
Time restriction: The function is executed when the current time lies
within one of 3 configurable time windows.
Speed control of the pump can be activated as required. The loading
strategy of the speed control system attempts to regulate the tempera-
ture difference to match the switch-on temperature difference that has
been set.
Display Characteristic min. max.
Factory
setting
Activation on, oFF
oFF
Pump type AC, HE
1) 2)
AC
Pump characteristics (only HE) bA, bb, C (see p. 14)
–
Speed control on, oFF
2)
oFF
Minimum speed (only AC) 30 % 100 % 50 %
Minimum speed (only HE + bA) 0 % 100 % 25 %
Minimum speed (only HE + bb) 0 % 100 % 75 %
Heat source sensor input 1 ... 5 –
Heat sink sensor input 1 ... 5 –
Switch-on temperature difference
T
diff on
T
diff off
+ 4 F 160 F 12 F
Switch-off temperature difference
T
diff off
0 F T
diff on
– 4 F 6 F
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