Regulating Modes; Regulation With Proportional Differential Pressure - DAB Neotherm EVOPLUS B 120/220.32 M Installationsanweisung Und Wartung

6.2.4. Outputs
Figure 9: Pull-out 6-pole terminal board: example of output connection
With reference to Figure 9 the digital outputs available are:
Output Terminal no. Type of contact
1 NC
OUT1 2 COM
3 NO
4 NC
OUT2 5 COM
6 NO
Table 4: Outputs OUT1 and OUT2
The outputs OUT1 and OUT2 are available on the pull-out 6-pole terminal board as specified in Table 4
which also shows the type of contact (NC = Normally Closed, COM = Common, NO = Normally Open).
The electrical characteristics of the contacts are shown in Table 5. In the example shown in Figure 8
the light L1 is lit when there is an alarm in the system and it goes off when no kind of malfunction is
found, whereas the light L2 is lit when the pump is running and goes off when the pump is stopped.
Characteristics of the output contacts
Max. bearable voltage [V]
Max. bearable current [A]
Max. accepted cable section [mm²]
Table 5: Characteristics of the output contacts
Associated function
Presence/Absence of alarms in the system
Pump running/Pump stopped
250
5 If resistive load
2,5 If inductive load
2,5
6.3. Connections for Twin Systems
For correct operation of the twin system, all the external connections of the pull-
out 13-pole terminal board must be connected in parallel between the 2 EVOPLUS
respecting the numbering of the individual terminals.
7. START
All the starting operations must be performed with the cover of the EVOPLUS
control panel closed. Start the system only when all the electrical and hydraulic
connections have been completed.
Avoid running the circulator when there is no water in the system.
As well as being at a high temperature and pressure, the fluid in the system may
also be in the form of steam. DANGER OF SCALDING!
It is dangerous to touch the circulator. DANGER OF SCALDING!
Once all the electrical and hydraulic connections have been made, fill the system with water and if
necessary with glycol (for the maximum glycol percentage see par. 2) and feed the system. Once the
system has been started it is possible to modify the operating modes to adapt better to the plant
requirements (see par.10).
8. FUNCTIONS
8.1.

Regulating Modes

EVOPLUS circulators allow the following regulating modes depending on plant requirements:
- Proportional differential pressure regulation depending on the flow present in the plant.
- Proportional differential pressure regulation with set-point depending on the external signal 0-10V
or PWM.
- Proportional differential pressure regulation depending on the flow present in the plant and on the
liquid temperature.
- Constant differential pressure regulation.
- Constant differential pressure regulation with set-point depending on the external signal 0-10V or
PWM.
- Constant differential pressure regulation with variable set-point depending on the liquid
temperature.
- Regulation with constant curve.
Regulation with constant curve with rotation speed depending on the external signal 0-10V or PWM.
The regulating mode may be set through the EVOPLUS control panel (see par. 10).
8.1.1.

Regulation with proportional differential pressure

In this regulating mode the differential pressure is reduced or increased as
the demand for water decreases or increases.
The Hs set point may be set from the display or by an external signal 0-10V
or PWM.
ENGLISH- GB