Inputs for flow-rate measurement
Flow rate and return-temperature limitation
Min. and max. limitation of flow rate
SERV setting value
No.
Function
28
–1
Configuration of the controller for measuring the primary flow rate.
flow rate
–1
=
not measured by the controller
+0
=
measured via auxiliary contact(s)
+1
=
measured by means of counting pulses in the unit litres/pulse
+2
=
measured by means of counting pulses in the unit pulses/litre
+3
=
measured by means of a DC signal 0...20 mA
+4
=
measured by means of a DC signal 4...20 mA
If a flow rate limiter is actuated, the controller will always respond in the same way, regardless of the
method of flow-rate measurement.
29
1.00
Value of the flow-meter pulses. The unit depends on the meter type. The unit (I/pulse or pulses/I is
determined by the configuration under SERV 28
(0.01...99.99)
30
10.00
Flow-rate corresponding to a maximum current signal of 20 mA.
(0.10...99.99) (m
3
/h)
-1
+0
+1
+2
+3
+4
B02641
l /
/ l
0...20
4...20
mA
SERV 28 = . . .
Mark the required function and enter the
value into the configuration sheet.
M
HK HK
SERV setting value
No.
Function
31
0.00
Lower flow-rate threshold at which the controller intervenes.
(0.00...99.99) (m
3
/h)
32
10.00
Upper flow-rate threshold (with simultaneous energy consumption for heating and domestic hot water) at
which the controller intervenes.
(0.00...99.99) (m
3
/h)
33
10.00
Upper flow-rate threshold (with energy consumption only for heating) at which the controller intervenes.
(0.00...99.99) (m
3
/h)
34
10.00
Upper flow-rate threshold (with energy consumption only for domestic hot water) at which the controller
intervenes.
(0.00...99.99) (m
3
/h)
R
–
36
–
7 000458 003