Watson-Marlow 720UN and 720SN User Manual
19
The voltage selector switch is not visible while the
720N 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 19.1
720N
module removal and replacement
.
If the mains power cable is inappropriate for your installation, it can be changed.
Please contact your local Watson-Marlow Bredel service centre.
Input line fusing
: type T5A H 250V
20mm time-delayed cartridge fuse, lo-
cated in a fuseholder in the centre of the
switchplate at the rear of the pump.
Power interruption
: This pump has an
auto-restart feature which, when active,
will restore the pump to the operating
state it was in when power was lost. See
16.6
Auto-restart
.
Stop / start power cycles
: Do not
power up/power down for more than
100 starts per hour, whether manually
or by means of the auto-restart facility.
We recommend remote control where a
high number of starts is required.
UN, SN
11 Start-up check list
Note: See also 26,
Tube loading
.
Ensure that proper connections are achieved between the pump tube and
suction and discharge piping.
Ensure proper connection has been made to a suitable power supply.
Ensure that the recommendations in section 9 Good pump installation practice
are followed.
