Connection Diagrams (Standard Version); Non-Standard Electrical Connections To Sensors And Protective Devices; Commissioning; General Safety Precautions - Zenit UNIQA Manual De Primera Instalación

better together
maintenance.
The cable is marked with a label with the letter "S" and must be connected to the corresponding terminal of the control panel. On request, the
electric pump can be equipped with single probes for the detection of water or humidity inside the oil chamber of the mechanical seals (S1), the
motor compartment (S2) and the terminal board compartment (S3) (Fig. 18).
For installations with -Ex certified models, the connection to the electric control panel must be carried out by inserting in safe
area an Intrinsic Safety barrier with galvanic isolation.
Electrical safety data for intrinsically safe circuit:
Leakage detector Ui: 30V; Ii: 120mA; Pi: 1.3W
Ci: 0.3nF; Li: ~ 0mH
Cable Cc: 200pF/m; Lc: 1µH/m; Lc/Rc= 30µH/Ω

4.6 Connection diagrams (standard version)

To set up the electrical connection of the electric pump, do the following:
1. Check which type of electrical connection is required on the identification plate (direct starting or Y/D).
2. Firstly, connect the earth wire to the relative terminal in the electrical panel, according to the connection diagram illustrated in Fig. 21-23.
3. Connect the power wires to the relative terminals in the electrical panel, according to the connection diagram illustrated in Fig. 21-23.
4. Connect the wires of the control devices to the terminals on the relative panel.

4.7 Non-standard electrical connections to sensors and protective devices

Please refer to the specific documentation supplied with the unit.
WIRING DIAGRAMS PAGE 147 - 148

5. COMMISSIONING

5.1 General safety precautions

All operations must be carried out by skilled technical staff.
•
The pump must always be used with the safety devices installed and in good working order.
•
Keep objects and people at a safe distance from the machines installed and do not allow people or animals to come into contact with the
liquid in which they are immersed.
•
Before carrying out any operation, make sure that the pump and electrical panel are disconnected from the electrical mains and cannot be
accidentally powered up.
•
Before connecting the pump to the power supply panel, check that the impeller can turn freely.
•
Check the level and the condition of the oil in oil chamber.
•
Check that the impeller turns in the correct direction using the procedure described in point 3.2 "Checking the impeller rotation direction".

5.2 Starting the electric pump

The pumps must not be started if the atmosphere in the tank is potentially explosive.
Once installation is complete, the system should be tested to ensure that it is fully operational.
Make sure that all protective equipment has been connected correctly.
Check that the required gate valves (where fitted) are open.
Switch on the power supply and let the pump run briefly and:
•
check that the input current is within the limit stated on the nameplate;
•
check whether the monitoring units are operating satisfactorily (no alarms or warnings);
•
check the setting of the level control system (minimum and maximum levels).
warning!
The maximum permitted number of starts per hour must be complied with to prevent damage to the motor (see Point 1.13).
In case of abnormal noise or vibration from the pump, other pump failure, alarms or warnings, stop the pump immediately and do not restart it
until the cause of the anomalies are found and fixed.

5.3 Acoustic pressure level

The pump's acoustic pressure level when in operation is below 70 dB.
However, in some systems and in some duty points on the performance curve this threshold may be exceeded.
Check the permitted acoustic pressure level in the environment where the product is installed to avoid breaching local legal requirements.
First installation manual – Translation of original instructions
EN
41