7 Operation
45 of 76
EtaLine Pro
1168.87/01-EN
Table 15:
Selecting Constant-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 Constant-pressure Control operating mode
▪
Change the control element (+) or (-) until the symbol for Constant-pressure
Control flashes.
▪
Press the control button (OK) to confirm the operating mode.
Step 3: Confirming the head setpoint
▪
Increase or decrease the flashing head setpoint using the control element
(+) or (-).
▪
Press the control button (OK) to confirm the setpoint.
– The selected setpoint lights up. It has been saved.
7.2.3 Proportional-pressure Control
Application
▪
Heating systems with radiators
The higher the flow rate, the higher the system’s resistance. This is corrected by the
pump set automatically increasing the head setpoint.
When setting the setpoint ensure that the selected control curve is suitable for the
system characteristic curve:
▪
If the system characteristic curve is known (e.g. hydraulic balancing), select a
control curve that is minimally above the characteristic curve. See type series
booklet.
– Control curve too low: undersupply
– Control curve too high: increased energy input
▪
If the system characteristic curve is unknown, dynamic control is recommended.
– The pump set automatically recognises the system characteristic curve via the
variable speed system and optimises the operating point accordingly.
Function
Within the permissible flow rate range the Proportional-pressure Control decreases
or increases the discharge head setpoint between
1
/
2
H
S
and H
S
. The setpoint can be
adjusted via the control panel.
Q
H
S
H
min
H
max
1
/
2
H
S
H
Fig. 26:
Proportional-pressure Control function
