6 720 820 872 (2016/12)
CR 400 | CW 400 | CW 800
42 | Service menu
DHW reduced
e.g. 15 ...
45
... 60 °C (80 °C)
The required DHW temperature for DHW reduced operating mode is only available if a
DHW cylinder is installed. The adjustment range depends on the installed heat source.
Start temp.
differential
e.g. – 20 ...
– 5
... – 3 K
If the temperature in the DHW cylinder is lower than the required DHW temperature
and differs by the start temperature differential, the DHW cylinder is heated up. The
adjustment range depends on the installed heat source.
Switch-off temp.
diff.
e.g. – 20 ...
– 5
... – 3 K
If the DHW temperature at the lower temperature sensor of the stratification cylinder
is lower than the desired DHW temperature and differs by the stop temperature
differential, the DHW cylinder is not heated further (only if MS 200 is used as a
stratification cylinder primary module).
Flow temp. increase 0 ... 40 K
Excess flow temperature required by the heat exchanger for heating up the DHW
cylinder. The default setting depends on the installed heat source.
DHW start delay
0 ... 50 s
The start of the burner for DHW heating is delayed by the set duration, since water
preheated by the solar system is supplied to the heat exchanger (“solar heat”) and the
heat requirement can possibly be met without burner operation.
Start cyl. primary
pump
Only available with DHW heating via a MM 100/MM 200 module
temp.-
compensated
Only if the temperature in the low loss header is higher than the temperature in the
DHW cylinder, is the cylinder primary pump switched on in case of a cylinder load (no
withdrawal of residual heat from the cylinder).
immed.
In case of a cylinder load the cylinder primary pump is switched on immediately
independent of the flow temperature.
Min. temp.
difference
0 ...
6
... 10 K
Temperature differential between low loss header and cylinder at the start of the
cylinder primary pump (only available if Start cyl. primary pump temp.-compensated
is selected in the menu).
DHW circ. pump
installed
Yes
DHW circulation lines and a DHW circulation pump are installed in the DHW system
(system I or II).
No
No circulation for DHW installed.
DHW circulation
pump
On
If the DHW circulation pump is to be controlled by the heat source, the DHW
circulation pump must be activated here as well. The default setting depends on the
installed heat source.
Off
The DHW circulation pump cannot be controlled by the heat source.
DHW circ. pump
mode
Off
Circulation off
On
Circulation permanently on (by taking the start frequency into account)
As DHW system I
(As DHW system II)
Activate the same time program for circulation as for DHW heating. Further
information and settings of the customised time program (
Æ
user interface operating
instructions).
Own time program Activate customised time program for circulation. Further information and settings of
the customised time program (
Æ
user interface operating instructions).
Start frequency
DHW circ.
If the DHW circulation pump is active via the time program for the DHW circulation
pump or if it is permanently switched on (DHW circulation pump operating mode: On),
this affects the settings for the DHW circulation pump operation.
1 x 3 minutes/h ...
6 x 3 minutes/h
The DHW circulation pump goes into operation once ... 6 times per hour for
3 minutes. The default setting depends on the installed heat source.
Permanently
The DHW circulation pump is in permanent operation.
Menu item
Adjustment range Description
Table 19 Settings in the DHW system I ... II
Summary of Contents for CR 400
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