Regulating Modes; Regulation With Proportional Differential Pressure; Regulation With Constant Differential Pressure; Regulation With Constant Curve - DAB Evoplus Small Serie Installationsanweisung Und Wartung

9. START
All the starting operations must be performed with the cover of
the EVOPLUS SMALL control panel closed!
Start the system only when all the electrical and hydraulic con-
nections 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. 3) 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.12).
10. FUNCTIONS

10.1 Regulating Modes

EVOPLUS SMALL circulators allow the following regulating modes de-
pending on plant requirements:
- Proportional differential pressure regulation depending on the flow
present in the plant.
- Constant differential pressure regulation.

- Regulation with constant curve.

The regulating mode may be set through the EVOPLUS SMALL control
panel (see par. 12 Page 2.0).

10.1.1 Regulation with Proportional Differential Pressure

In this regulating mode the differential pressure is reduced
or increased as the demand for water decreases or in-
creases.
The Hs set point may be set from the display.
Regulation indicated for:
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- Heating and conditioning plants with high load losses.
- Two-pipe systems with thermostatic valves and head ≥ 4 m.
- Plants with secondary differential pressure regulator.
- Primary circuits with high load losses.
- Domestic water recirculating systems with thermostatic valves on the
rising columns.

10.1.2 Regulation with Constant Differential Pressure

In this regulating mode the differential pressure is kept con-
stant, irrespective of the demand for water,
The Hs set point may be set from the display.
Regulation indicated for:
- Heating and conditioning plants with low load losses.
- Two-pipe systems with thermostatic valves and head ≤ 2 m.
- Single-pipe systems with thermostatic valves.
- Plants with natural circulation.
- Primary circuits with low load losses.
- Domestic water recirculating systems with thermostatic valves on the
rising columns.
10.1.3 Regulation with constant curve
In this regulating mode the circulator works on characteristic
H
curves at a constant speed. The operating curve is selected
limite massimo
maximum limit
by setting the rotation speed through a percentage factor.
The value 100% indicates the maximum limit curve. The
actual rotation speed may depend on the power and differ-
ential pressure limits of your circulator model.
Q The rotation speed may be set from the display.
Regulation indicated for heating and conditioning plants with constant flow.

10.2 Expansion Modules

EVOPLUS SMALL circulators may be equipped with some expansion
modules that allow their functions to be increased.
For details on the procedures for installation, configuration and use of the
expansion modules, see the specific manual.
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ENGLISH
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