Connections For Twin Systems; Regulating Modes - Saci pumps EVOPLUS B 120/220.32 SAN M Serie Instrucciones Para La Instalación Y El Mantenimiento

8.3

Connections for Twin Systems

To make a twin system it is sufficient to connect 2 EVOPLUS circulators using the cable supplied, inserting it
in the connector provided (see Table 2).
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.
For the possible operating modes of twin systems see par. 12 Page 8.0 of the EVOPLUS menu.
9. 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. 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 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. 12 Page 2.0).
ENGLISH