First installation manual – Translation of original instructions
The user must ensure that the pump operates always with the minimum level of pumped liquid
controlled by two level sensors (in redondancy) to shut down the power supply when the liquid
to be pumped belows the minimum level.
Only use level sensor according with the -Ex classification of the installation site.
The connection to the electric control panel must be carried out using an Intrinsic Safe Circuit
such as a Zener safety barrier or a galvanic isolation barrier.
Ensure that the switch from shut down to start-up occurs only and exclusively if both of the floats find
themselves in the position shown in Fig 10 A - B - C.
Ensure that the switch from start-up to shut down occurs only and exclusively if both of the floats find
themselves in the position shown in Fig 11 A - B - C.
The electric connection of the floats must be carried out in such a way that ensures the shutdown of the pump
in cases of a malfunctioning float.
Make sure that effective volume of the tank does not become so low that the number of starts per hour
exceeds the maximum admitted.
EN
ON
OFF
3.4 Permitted installation types
Type of
installation
P
S
T
Z
X
* Possible holes for non Zenit accessories
(For the mounting holes required, refer to the product technical sheet)
36
ON
10 A
OFF
11 A
Discharge flange
Zenit accessory
DAC-V / DAC-H
KBS
KBC
KBS-H
-
ON
10 B
OFF
11 B
Suction flange
*
better together
ON
OFF
9
10 C
11 C
Standard
Optional