Maintenance - Calpeda Nmx Bedienungsanleitung

on the pump casing, otherwise disconnect electrical
power and reverse the connections of two phases.
Check that the pump works within its field of
performance, and that the absorbed current shown on
the name-plate is not exceeded.
Otherwise adjust the delivery gate valve or the setting
of any pressure switches.
Never run the pump for more than five
minutes with a closed gate valve.
Do not touch the fluid when its temperature
is higher than 50 °C.
Burn hazard. Due to high temperature of the
fluid, the pump casing and the motor may
reach temperatures higher than 50°C.
DO NOT TOUCH these parts unless with
suitable protective devices or wait and
make sure they have completely cooled.
Prolonged operation without a change of water in the
pump causes dangerous increases of temperature and
pressure.
7.3. Switch off of the pump
ON
The appliance must be switch off every time
there are faults. (see troubleshooting).
The product is designed for a continuous duty, the
switch off is performed by disconnecting the power
supply by means the expected disconnecting devices.
(see paragraph "6.5 Electrical connection").

8. MAINTENANCE

Before any operations it's necessary to disconnect the
power supply.
If required ask to an electrician or to an expert
technician.
Every maintenance operations, cleaning or
reparation executed with the electrical system
under voltage, it could cause serious injuries
to people.
If the supply cord is damaged, it must be
replaced by the manufacturer, its service agent
or similarly qualified persons in order to avoid
a hazard.
In case of extraordinary maintenance, or maintenance
operations that require part-removing, the operator
must be a qualified technician able to read schemes
and drawings.
It is suggest to register all maintenance operation
executed.
During maintenance keep particular attention in
i
order to avoid the introduction of small external
parts, that could compromise the device safety.
It is forbidden to execute any operations with
the direct use of hands. Use water-resistant,
anti-cut gloves to disassemble and clean.
NMX Rev100000286_01 - Operating Instructions
During maintenance
i
personnel is not allowed.
Maintenance operations that are not described in
this manual must be made only by special personnel
authorized by Calpeda S.p.A.
For further technical information regarding the use or
the maintenance of the device, contact Calpeda S.p.A.
8.1. Routine maintenance
(Standard construction)
OFF
Before every
disconnect the power supply and make sure
that the device could not accidentally operate.
Burn hazard. Due to high temperature of the
fluid, the pump casing and the motor may
reach temperatures higher than 50°C.
DO NOT TOUCH these parts unless with
suitable protective devices or wait and
make sure they have completely cooled.
For good measure, as in the case of temporary
operation with dirty liquids, run the pump
briefly with clean water to remove deposits.
When the pump remains inactive it must be
emptied completely if there is a risk of freezing
(par. 12.1 fig. 4).
Before restarting the unit, check that the shaft is not
jammed and fill the pump casing completely with liquid.
(Special construction)
OFF
Wear protective glasses for splashes.
8.2. Dismantling the system
Close the suction and delivery gate valves and drain
the pump casing before dismantling the pump.
8.3. Dismantling the pump
OFF
Close the suction and delivery gate valves and drain
the pump casing before dismantling the pump.
For dismantling and re-assembly see construction in
the cross section drawing.
With the NMX, pumps the motor can be taken out, by
remowing the screws (14.24), complete with impeller
without removing the pump casing and the pipes.
operations external
maintenance operations
Page 13 / 80
EN