KM 251 en Electrical Connections
V1.0 29
To connect the temperature controller to the mains supply, please refer to the instructions
for the electric temperature controller.
6.5 Diaphragm control (optional)
!
Warning
Pumps in explosion protected version with diaphragm breakage signal are fitted
with a contact manometer in explosion protected version. It must be grounded.
Connecting the earthing cable (4u) see diagram.
6.6 Connecting the Power Supply Cable
Warning
Disconnect the mains voltage before connecting the power supply cable!
Before connecting the power supply cable, check that the mains voltage specified
on the type plate corresponds to the local conditions!
Do not make any changes to the mains cable or plug!
Caution
The pump can be automatically started by connecting the mains voltage!
!
Warning
The assignment between the plug-and-socket connection and the pump must be
labelled clearly (e.g. by labelling the socket outlet).
• Do not switch on the mains voltage until you are ready to start the pump.
6.6.1 Versions Without Mains Plug
!
Warning
A clearly labelled all-pole isolating switch with a contact opening width of at least
3 mm should be installed between the pump and the mains.
Connect the motor to the mains in accordance with local electrical installation regulations
as is shown on the terminal connection plan (on the lid of the connection box).
2e1 Sensor
2e2 Heating
2e3 Power supply
2e1
2e2
2e3
S Contact manometer
5s Union nut
6s Contact output
T Ball check
U Connection piece
2u Deaeration screw
3u O-rings
4u Connection for earthing cable
5u Union nut
*2) or locking unit
T
5u
4u
3u
2)
U
5s
3u
2u
S
6s
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