The ground (earth) lead must be 50 mm (2.0 in.) longer than the phase leads in the
junction box of the unit.
7. Make sure that the pump is correctly connected to ground (earth) .
8. Make sure that any thermal contacts incorporated in the pump are properly connected
to the terminal block/closed end splices.
9. Install the stator housing.
10.Install the entry gland screw.
4.2.3 Connect the motor cable to the starter and monitoring equipment
DANGER: Explosion/Fire Hazard
Special rules apply to installations in explosive or flammable atmospheres. Do not install
the product or any auxiliary equipment in an explosive zone unless it is rated explosion-
proof or intrinsically-safe. If the product is EN/ATEX-, MSHA- or FM-approved, then see
the specific EX information in the Safety chapter before taking any further actions.
NOTICE:
Thermal contacts are incorporated in the pump.
NOTICE:
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.
The single phase pumps must be equipped with a starter which has start and run
capacitors.
A specially Flygt designed starter is required for the operation of single phase pumps.
The connection of the motor cable to the starter is shown in the wiring diagram.
1. If thermal contacts are included in the pump installation, then connect the T1 and T2
control conductors to the monitoring equipment.
If the temperature of the pumped liquid is above 40°C (104°F), do not connect the T1
and T2 leads to thermal contacts.
NOTICE:
The thermal contacts are incorporated in the stator. Connect them to 24 V over
separate fuses to protect other automatic equipment.
2. Connect the mains leads (L1, L2, L3, and ground (earth)) to the starter equipment.
For information about the phase sequence and the color codes of the leads, see Cable
charts (page 28).
3. Applicable for permanent magnet motor; ensure that the warning label is attached to
the cable end. In case the label is missing, attach the spare label to the cable end.
The label is delivered with the pump.
4. 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.
4 Installation
Flygt 3085 Installation, Operation, and Maintenance Manual 27
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