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Watson-Marlow 620DuN and 620Du User Manual 16
The voltage selector is mounted in the switchplate at
the rear of the pump, protected from water by the
620N module (620DuN). The module must be
removed to allow access to the switchplate. See 22.1
620N module removal and replacement. Set the
voltage selector to 115V for 100-120V 50/60Hz
supplies or 230V for 200-240V 50/60Hz supplies.
Always check the voltage selector switch before con-
necting the mains supply. Make suitable connection
to an earthed, single-phase mains electricity supply.
We recommend using commer-
cially available supply voltage
surge suppression where there
is excessive electrical noise.
DuN
Power cable: The pump is supplied fitted with either of two cable glands and
approximately 2.8m of power cable. The European cable is to Harmonised code
H05RN-F3G0.75, used with our gland part number SL0128 which is suitable for an
outside cable sheath diameter of 4-7mm. The north American cable is to type
SJTOW 105C 3-18AWG VW-1 used with our gland part number SL0123 which is suit-
able for an outside cable sheath diameter of 7-9mm.
Power cables of NEMA 4X specification pumps are fitted with a standard US mains
power plug. IP66 specification pumps are supplied with no plug. Wiring a mains plug
must only be undertaken by suitably skilled, qualified personnel.
DuN, Du 10 Connecting this product
to a power supply
A well regulated electrical mains supply is required along with cable connections
conforming to the best practice of noise immunity. It is not recommended to site
these drives alongside “dirty” electrical mains supplies such as 3-phase
contactors and inductive heaters without special attention being paid to
unacceptable mains-borne noise.
If the mains power cable is inappropriate for your installation, it can be changed.
Please contact your local Watson-Marlow Bredel service centre.
The voltage selector switch is not visible while the
620N module is in place. Do not switch the pump on
unless you have checked that it is set to suit your
power supply by removing the module and inspecting
the switch, and then refitting the module. See 22.1 620N
module removal and replacement.
DuN
DuN, Du
European North American
line brown black
neutral blue white
ground green/yellow green
Conductor coding