7 Operation
46 of 76
EtaLine Pro
1168.87/01-EN
Setting
H
H
max
H
S
H
min
Q
Fig. 27:
Proportional-pressure Control settings
Table 16:
Selecting Proportional-pressure Control and the setpoint
Step 1: Activating the setting mode
▪
Press and hold the control button (OK) for 3 seconds
– The flashing symbol indicates the active operating mode.
Step 2: Selecting the Proportional-pressure Control operating mode
▪
Change the control element (+) or (-) until the symbol for Proportional-
pressure Control flashes.
▪
Press the control button (OK) to confirm the operating mode.
Step 3: Setting the head setpoint
▪
Increase or decrease the flashing setpoint by changing the control element
(+) or (-).
▪
Press the control button (OK) to confirm the setpoint.
– The selected setpoint lights up. It has been saved.
Step 4: Changing the flow rate setpoint
▪
Increase or decrease the flashing setpoint by changing the control element
(+) or (-).
▪
Press the control button (OK) to confirm the setpoint.
– The selected setpoint lights up. It has been saved.
7.2.4 Dynamic Control
Application
▪
Heating systems with radiators
Dynamic Control is a more energy-efficient alternative to Proportional-pressure
Control. The piping losses follow a quadratic system characteristic curve. Dynamic
Control makes the pump set follow a quadratic control curve and automatically
recognises the averaged degree of opening of the thermostatic valves.
When the thermostatic valves are closed or strongly throttled, the pump set’s head
reduction exceeds that of the reduction specified by the quadratic control curve. The
thermostatic valves open and maintain the required flow rate.
If the thermostatic valves do not respond further to the decreasing head, the pump
set automatically switches back to the original control curve. This prevents any
undersupply.
