18
WARNING
The float must be installed in the tank and connected thanks to two wires to the special terminals on the control board.
The three probes should be specially placed in the first collection deposit and should be then connected to terminals inside the
board. The COMMON probe must be installed at the lowest level in the tank and anyway always at a level lower than the minimum
level probe (LOW) that prevents from the working of the pilot pump when water descends below this level. The maximum level probe
(HIGH) allows again the working of the pilot pump when the water reaches this level.
In the case where the group is fed by a water duct under pressure (for example municipal water system), it is necessary to install a
minimal pressure sensor which prevents from the working of the group if the pressure in the duct descends below the preset value.
On the switchboard it is possible to connect a device for control of the level into the tank. (Our groups are delivered with jumped
terminals 4-5-6)
1. FLOAT SWITCH
2. ELECTRONIC CONTROL WITH PROBES
3. INVERTED MINIMAL PRESSURE SENSOR
PROTECTION AGAINST THE DRYOPERATION OF THE MOTOR PUMPS SEE FIG.6
In this case the group is not protected against dry-operation. It is therefore necessary to remove the electric jumpers
and to connect them to the control device chosen as follows.
GB
STARTING UP
CHAPTER 6
See fig.3-4-5-6-7-8 and diagrams in the distribution board.
CONTROL OF THE DIRECTION OF ROTATION OF THE PUMP WITH INVERTER DRIVE
Once all the hydraulic and electric connections have been done for the hydraulic priming of the pumps and collectors,
proceed as follows:
The following message (1) will be displayed
Warning: from this moment any operations on pump ducts, pressure transducer, pressure sensor, etc. must
be done after having cut the voltage off from the distribution board.
DANGER ELECTRIC SHOCK RISK
NOCCHI PUMPS
Bar 05.0
• Close all the valves of the distribution
system
• Open all the valves of the group,
included those of the membrane ways
• Control the closing of the distribution
board hatch
• Place the power supply disconnector
on I (ON)
A small bell will give out a set of beeps. The green LED (2) will lit
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