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Safety, Installation and Operations Manual – Translation of original instructions
4.4 Checking the impeller rotation direction
When three phase pumps are being commissioned for the first time, and also when used on a new site, the direction of rotation of the impeller
must be checked by a qualified technician.
The pump carries a decal which indicates the correct impeller rotation direction (green arrow) and the relative kickback direction (red arrow).
When the pump is viewed from above (motor cover), the impeller must rotate CLOCKWISE. (Fig. 3C).
All of the following operations should be carried out in a secure place, in absence of potentially explosive atmospheres
Proceed as follows:
1. Take the safety precautions detailed in the 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.
caution
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.
EN
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.
caution
If more than one pump is connected to a single control panel, the rotation direction must be checked individually for each
unit installed.
4.5 Permitted installation types
Type of
Zenit accessory
installation
P
S
T
Z
X
* Possible holes for non Zenit accessories
(For the mounting holes required, refer to the product technical sheet)
DAC
40
Discharge flange
DAC-V / DAC-H
KBS
KBC
KBS-H
-
KBS
Suction flange
*
KBC
KBS-H
better together
Standard
Optional
FLX
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