Danfoss C67, User Manual

Page: 58 / 84

The grey
side of the
ECL Card
Ex
tended ser
vic
e
32l
Service parameter(s) 43
43 Priority or parallel operation
Circuit Setting range Factory setting
I / II OFF / 1 ... 99 K OFF / OFF
Choose whether the DHW should have priority or the heating
operation should be limited at DHW charging if the circuits are
operated in parallel.
OFF: Priority operation for the DHW circuit.
1 ... 99:
Parallel operation of DHW and heating
circuits. Set the limit for parallel operation.
Parallel operation is obtained as long as the
difference between T
flow.ref I
and T
flow.ref II
is
less than the set value.
When the parallel operation is active, and the charging
temperature (at S3) cannot be kept at the set level (circuit II, line C,
section 3 in the yellow part), the controller changes into priority
operation.
If the DHW charging time exceeds 35 minutes and the DHW
temperature is above the cut-in level (circuit II, line 2), the
controller changes into heating operation.
If the controller has changed to priority operation and the DHW
temperature remains below the cut-in level, the controller does
not change into heating operation. This situation can be avoided
by setting a lower value for the DHW charging temperature.
Priority operation
Temp.
T
flow.ref II
T
flow.ref I
Line 43
Time
Heating
DHW
Parallel operation
Temp.
T
flow.ref II
T
flow.ref I
Line 43
Time
Heating
DHW