NOTICE:
• Thermal contacts are incorporated in the pump.
• Thermal contacts must never be exposed to voltages higher than 250 V, breaking
current maximum 4 A. It is recommended that they are connected to 24 V over
separate fuses to protect other automatic equipment.
1. If thermal contacts are included in the pump installation, connect the T1 and T2 control
conductors to the monitoring equipment.
Do not connect the T1 and T2 leads to thermal contacts if the temperature of the
pumped liquid is above 40°C (104°F).
NOTICE:
Ex-approved products must always have the thermal contacts connected irrespective
of the ambient temperature.
2. Connect the mains leads (L1, L2, L3, and earth [ground]) to the starter equipment.
For information about the phase sequence and the color codes of the leads, see
3. Check the functionality of the monitoring equipment:
a) Check that the signals and the tripping function work properly.
b) Check that the relays, lamps, fuses, and connections are intact.
Replace any defective equipment.
Cable charts
Description
This topic contains general connection information. It also provides cable charts that show
connection alternatives for use with different cables and power supply.
L2
L1
L2
L3
L3
L1
WS000509B
WS000509C
L2
L3
L1
L1
L3
L2
T1 T2
Figure 6: Phase sequence
Connection locations
The figures in this section illustrate how to interpret the connection strip symbols.
Installation
22
Flygt 5520 Installation, Operation, and Maintenance Manual
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