17 Description of function
34
99E13331xx-mub-en - V08
2022/07
During the first commissioning of the circulation pump, you should specify the following
parameters to adapt the operation of the domestic hot water module to the current circulation
line:
•
PWM value (0 ... 100 %) for the control of the circulation pump (PWM 2)
•
Temperature sensors for hot and cold water (e.g. T-DHW and T-CW,
optional: temperature at the external circulation sensor)
The setting of the PWM value for the pump control is made at the menu item
Circulation →
Pump rotation speed
. All relevant values are displayed in a hydraulic scheme.
In this menu item, you can set the PWM signal (rotation
speed) of the circulation pump with the operating buttons
Upwards
and
Downwards.
With the setting, the flow in
the circulation line is modified, and consequently the
temperature difference between inlet and outlet.
CIRCULATION FLOW RATE
5.1 l/min
Yes No
Please confirm the current flow rate which is currently
circulated in the circulation mode (no active withdrawal)
by the confirmed setting.
This flow rate is taken into account for statistic purposes
at
Status → Measured / balanced values → Withdrawal
quantity
to calculate more exactly the real withdrawal
quantities.
NOTICE
An additional external circulation sensor can be defined. This can be useful to minimise the
runtimes of the circulation pump or to determine the temperatures of pipes with a bad
circulation.
The circulation function offers 3 operating modes which can be combined with each other.
•
Temperature control
•
Time control
•
Demand
Depending on the activated mode, additional settings are required.
Circulation