Danfoss Nessie Plug&Spray NPS 12.5CS Instrukcja instalacji i uruchomienia - Strona 4
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Drukuj stronę8. Electrical connection
Please note: The electrical connection for the Nessie Plug&Spray
units is only to be installed by authorized and skilled personnel. Local
directions must be followed under any circumstance.
8.1 Basic unit without electrical connecting box
Constant speed version (CS)
Electric motor:
Water supply low-pressure switch:
Water temperature switch:
8.2 Basic unit without electrical connecting box
Variable speed version (VS)
FCM 300 drive motor:
MBS 3050 pressure transmitter:
4
TM
The electric motor is a standard IEC or Nema AC motor and has to be
wired and protected against overload according to local codes. See the
motor nameplate for technical data.
Connect to the motor terminals as necessary.
The motor is wound for 3 × 230/400 V in IEC version and 3 × 230/460 V
in Nema version. Special versions with single-phase motors or other
supply voltages are available on request. Check the nameplate data!
The switch protects the pump against cavitation (insufficient supply
pressure) or from running dry (no water supply). Wire the break contact
to your control system to stop the motor at insufficient supply pressure.
The contact 1-3 is made when the pressure is sufficient.
The switch is set to be activated at 1.6 bar.
Max. load: 250 V AC/24 V DC, 0.5 A
The switch protects the system against overheating. Wire the break
contact to your control system to stop the motor at high temperature.
The contact 1-2 is made when the temperature is below 50°C.
The switch is set to be activated at 50°C ±5°C.
Max. load: 250 V AC/24 V DC, 0.5 A
The Danfoss FCM 300 drive motor has to be connected to a 380-480 V
50/60 Hz 3-phase power supply as described in the operation instruction
(delivered with variable speed Plug&Spray
Please read the instruction carefully.
The MBS 3050 pressure transmitter is already wired into the FCM 300
drive motor (terminal 6 for 24 V DC power supply and terminal
1 analogue input 4-20 mA)
521B0881 DKCFN.PI.020.F1.02
TM
Units).