ERPN-M USER INSTRUCTIONS ENGLISH 02-08
Page 8 of 37
Avoid mechanical, hydraulic or electrical overload by
using motor overload trips or a Power Monitor and
make routine vibration monitoring.
In dirty or dusty environments, regular checks must
be made and dirt removed from areas around close
clearances, bearing housings and motors.
1.6.4.4 Additional requirements for pumps with
magnetic drive
It is recommended for users to fit a temperature
monitor in the magnetic drive bearing/shell area when
pumping liquids with solids content or liquids that can
polymerize or freeze.
In unmanned locations where a magnetic drive is
used it is advisable to fit a vibration monitor.
1.6.4.5 Preventing the build up of explosive
mixtures
ENSURE THE PUMP IS PROPERLY FILLED
AND VENTED AND DOES NOT RUN DRY
Ensure the pump and relevant suction and discharge
pipeline system is totally filled with liquid at all times
during the pump operation, so that an explosive
atmosphere is prevented. In addition it is essential to
make sure that seal chambers, auxiliary shaft seal
systems and any heating and cooling systems are
properly filled.
If the operation of the system cannot avoid this
condition the fitting of an appropriate Dry Run
protection device is recommended (eg liquid
detection or a Power Monitor).
To avoid potential hazards from fugitive emissions of
vapour or gas to atmosphere the surrounding area
must be well ventilated.
1.6.4.6 Preventing sparks
To prevent a potential hazard from mechanical
contact the coupling guard must be non-sparking and
anti-static.
To avoid the potential hazard from random induced
current generating a spark the earth contact on the
baseplate must be used.
Avoid electrostatic charge: do not rub non-
metallic surfaces with a dry cloth
;
ensure cloth is
damp.
The coupling must be selected to comply with
94/9/EC and correct alignment must be maintained.
1.6.4.7 Preventing leakage
The pump must only be used to handle liquids
for which it has been approved to have the correct
corrosion resistance.
Avoid entrapment of liquid in the pump and
associated piping due to closing of suction and
discharge valves, which could cause dangerous
excessive pressures to occur if there is heat input to
the liquid. This can occur if the pump is stationary or
running.
Bursting of liquid containing parts due to freezing
must be avoided by draining or protecting the pump
and ancillary systems.
If leakage of liquid to atmosphere can result in a
hazard, the installation of a liquid detection device is
recommended.
1.6.4.8 Additional requirements for pumps with
magnetic drive
If protection greater than Categories 2 and M2 is
required, then liquid detection should be provided in
the bearing housing/support head.
1.6.4.9 Maintenance to the centrifugal pump to
avoid the hazard
CORRECT MAINTENANCE IS REQUIRED
TO AVOID POTENTIAL HAZARDS WHICH GIVE A
RISK OF EXPLOSION
The responsibility for compliance with
maintenance instructions is with the plant
operator.
To avoid potential explosion hazards during
maintenance, the tools, cleaning and painting
materials used must not give rise to sparking or
adversely affect the ambient conditions. Where there
is a risk from such tools or materials, maintenance
must be conducted in a safe area.
It is recommended that a maintenance plan and
schedule is adopted (see section 6,
Maintenance
).to
include the following.
a) Any auxiliary systems installed must be
monitored, if necessary, to ensure they function
correctly.
b) Check for any leaks from gaskets and seals. The
correct functioning of the magnetic coupling must
be checked regularly
c) Check bearing lubricant level, and if the hours run
show a lubricant change is required.
d) Check that the duty condition is in the safe
operating range for the pump.
