DAB Evoplus Small 40/180 M Installationsanweisung Und Wartung Seite 22

GB
ENGLISH
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 sy-
stem.
in the system may also be in the form of steam. DANGER OF
SCALDING!
It is dangerous to touch the circulator. DANGER OF SCALDING!
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:
-
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).
20
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 incre-
ases.
The Hs set point may be set from the display.
Regulation indicated for:
- Heating and conditioning plants with high load
losses.
-
- 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.
-
- 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
curves at a constant speed. The operating curve is selected
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 diffe-
rential pressure limits of your circulator model.
The rotation speed may be set from the display.