Installing The Float Switch Control System; Permitted Installation Types - Zenit UNIQA M08S Manuel De Première Installation

www.motralec.com / service-commercial@motralec.com / 01.39.97.65.10
All of the following operations should be carried out in a secure place, in absence of potentially explosive atmospheres; if this is
not possible, you must carry out the testing with a device which controls the sequence phases installed inside the electric panel.
Proceed as follows:
1. Take the precautions detailed in the "Safety Precautions" manual.
2. Place the pump vertical on its feet or base.
3. Secure the pump by tying a suitably sized chain or sling to the handle on the top to prevent it from falling over after the kickback.
!
warning The kickback may be very strong. Do not stand close to the pump during the procedure.
4. Temporarily connect the yellow-green wire to the system ground connector and then connect the power supply wires to the contactor.
5. Make sure there are no people or objects within a distance of at least 2 metres of the pump.
6. Operate the start switch, power up the pump for a few seconds and then shut off the power by flicking the stop switch.
7. Check that the rotation direction is correct.
If the pump is rotating in the wrong direction, invert two of the pump's three power supply phases and try again, repeating the procedure described.
Once the connection which provides the correct rotation direction has been obtained, MARK the precise order in which the wires have been con-
nected to the system, DISCONNECT the power supply wires from the pump and proceed with definitive installation.
!
If more than one pump is connected to a single control panel, the rotation direction must be checked individually for each
warning
unit installed.
3.3 Installing the float switch control system (Fig. 7 page 69)
Float switches allow one or more pumps to be started and stopped in response to the level of liquid in the tank.
They can also be connected to alarm devices to prevent operational problems (overflow or dry running).
They must be installed well away from turbulence or inflows of water.
In the event of strong turbulence, float switches should be installed on a rigid rod mounted inside the pit.
Make sure that there are no items which may obstruct movement of the floats and that the wires do not interfere with each other, and cannot
become tangled or trapped on projections inside the tank.
Float switches must be installed in such a way that the correct minimum liquid level is guaranteed (see point 1.8.1).
In the case where installation of an ATEX pump provide a level control system through float switches, there needs to be at least
2 (start-up and shutdown) and, if installed in a hazardous area, they must be certified for potentially explosive atmospheres. In
this instance, the connection to the electric control panel must be carried out using an Intrinsic Safety interface 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 8 page 69.
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 9 page 69.
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.

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)
WET version electric pumps are built to operate in immersed S1 service. Contact Zenit for periodic, intermittent use with a DRY version.
DRY version electric pumps are designed to operate in dry S1 service.
Models M08S and M08L are built without cooling jackets, and with cold motors.
All the other pumps are fitted with a PATENTED jacket, with a closed circuit cooling system.
Discharge flange
Zenit accessory
DAC-V / DAC-H
KBS
KBC
KBS-H
-
First installation manual – Translation of original instructions
Suction flange
*
EN
Standard
Optional
19