Page 17 / 88
N, N4 Rev. 13 - Operating Instructions
GB
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 maintenan-
ce operations that require part-removing, the opera-
tor must be a qualified technician able to read sche-
mes and drawings.
It is suggest to register all maintenance operation
executed.
During maintenance keep particular attention
in 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 the
filter or in other particular cases.
During maintenance operations external
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)
Before
every
maintenance
operations
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.
When the pump remains inactive it must be emptied
completely if there is a risk of freezing
Fig. 9
.
Before restarting the unit, check that the shaft is not
jammed and fill the pump casing completely with liquid.
8.1.1 Routine maintenance (Special construction)
Before
every
maintenance
operations
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.
When the pump remains inactive it must be emptied
completely if there is a risk of freezing
Fig. 9
.
Before restarting the unit, check that the shaft is not
jammed and fill the pump casing completely with liquid.
8.2. Pumps with mechanical seal
Mechanical seals do not require maintenance.
Except for possible initial leakage after the first start-
up, the mechanical seal on the shaft must function
without any loss of liquid.
Do not run the pump when dry.
8.3. Maintenance Pumps with packing seal
First loosen the gland slightly so that the seal is decom-
pressed. Then adjust the gland, leaving a regular leaka-
ge-drip, which indicates proper lubrification.
The packed gland must be replaced when its sealing
properties have considerably decreased. A compres-
sed, hardened and dry packing causes the shaft to
wear.
8.4. Ball bearings and lubrication
For the motor see separate instructions (if supplied).
Pump bearings are lubricated with high quality lithium
soap grease.
Initial lubrication at the factory will be sufficient for 5,000
hours operation. After this period, the shaft and bearings
should be dismantled for checking, cleaning (bearings,
covers and support have to be washed with diluent) and
re-lubrication with fresh grease.
In heavy working conditions (over 8 hours/day, in
dusty or humid environments or with high ambient
i
i
OFF
OFF
4.93.142
Fig. 9 Draining.
4.93.142
Fig. 9 Draining.
IST N_N4 09_2018_Rev13_MXS 11_03con gall 10/09/18 10:52 Pagina 17
