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Beschikbare talen
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Max. accepted cable section [mm²]
Table 5: Characteristics of the output contacts
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.
17
2,5
If inductive load
2,5
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.
Regulation indicated for:
-
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.
8.1.2.
Regulation with Constant Differential Pressure
In this regulating mode the differential pressure is kept constant,
irrespective of the demand for water,
The Hs set point may be set from the display or by an external signal
0-10V or PWM.
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.
8.1.3.
Regulation with constant curve
In this regulating mode the circulator works on characteristic curves
at a constant speed. The operating curve is selected 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 differential pressure limits of your circulator
model.
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