7.4 Diaphragm controller (optional)
Warning
Explosion-proof pumps with diaphragm leakage detection
are fitted with a contact pressure gauge in explosion-proof
version.
The pressure gauge must be earthed.
Connecting the earth cable (4u), see figure below.
T
5u
4u
3u
2)
U
5s
3u
2u
S
6s
TM036453
Diaphragm controller
Pos.
Components
S
Contact pressure gauge
5s
Union nut
6s
Contact output
T
Ball non-return valve
U
Connection piece
2u
Deaeration screw
3u
O-rings
4u
Connection for earth cable
5u
Union nut
2)
or locking unit (instead of contact pressure gauge and its
connection)
7.5 Connecting the power supply cable
Warning
Disconnect the power supply before connecting the power
supply cable!
Before connecting the power supply cable, check that the
rated voltage stated on the pump nameplate corresponds
to the local conditions!
Do not make any changes to the power supply cable or
plug!
Caution
The assignment between the plug-and-socket connection
and the pump must be labelled clearly (e.g. by labelling
the socket outlet).
Caution
The pump can be automatically started by connecting the
power supply!
•
Do not switch on the power supply until you are ready to start
the pump.
7.5.1 Versions with mains plug
•
Insert the mains plug in the mains socket.
7.5.2 Versions without mains plug
Warning
The pump must be connected to an external clearly label-
led mains switch with a minimum contact gap of 3 mm in
all poles.
•
Connect the motor to the power supply in accordance with local
electrical installation regulations and the connection chart on the
terminal box cover.
Warning
The specified enclosure class can only be ensured if the
power supply cable is connected with the same degree of
protection.
Caution
Observe the direction of rotation!
To protect the motor, install a motor protecting switch or
motor contactor, and set the bimetal relay to the rated mo-
tor current for the available voltage and frequency.
29
English (GB)
Summary of Contents for DMH 25X
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