E-Tech Series EGT EGF - Manual (Page 13)

Page 13 / 80 ED, EG Rev. 2 - Operating Instructions
GB
Construction without float switch: start the pump
only if fully immersed in the liquid to be raised.
The Single-phase motor will stop if operation is
prolonged with water at a temperature above 35 °C.
When the windings cool down, the thermal protector
enables restarting.
Relief valve for EGN, EGT, EGF: the pump is fitted
to a relief valve for air release around the impeller
granting a proper pump priming also after long
standstill periods.
7.3 Switch off of the pump
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 devi-
ces. (see paragraph "6.8 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 techni-
cian.
Every maintenance operations, cleaning or
reparation executed with the electrical system
under voltage, it could cause serious injuries
to people.
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 ope-
ration 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 Vertical S.r.l..
For further technical information regarding the use or
the maintenance of the device, contact Vertical S.r.l..
8.1 Routine maintenance
Before every maintenance operations
disconnect the power supply and make
sure that the device could not accidentally
operate.
The pump may have been immersed in
hazardous
substances or products
emanating toxic gases, or may be located
in an environment which is toxic due to
other reasons; make sure all necessary
precautionary measures are taken to avoid
accidents.
Any pumps that require inspection/repair must be
drained and carefully cleaned inside and outside
before dispatch/submission.
Hose down all accessible parts with a jet of water.
If there is a risk of freezing, take the pump out of the
water and leave in a dry place.
When used with muddy liquids, run the pump briefly
with clean water to remove all deposits immediately
after use or before a period of inactivity.
Check periodically that the relief valve item 14.80 is
not clogged by impurities. If required, remove the
screws 14.24 and the fixing ring 14.22.
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
For disassembly and reassembly, refer to the cross-
section drawing (paragraph 12.2 Annexes).
The pump function can be impaired by erroneous
procedure or tampering with internal parts.
For EGN, EGT, EGF
To inspect the impeller (28.00), to clean the internal
parts and to check whether the impeller turns freely
when moved by hand, remove the screws (15.70
EGN) or strainer (15.50 EGN), the screws (14.24)
pump casing (14.00).
To dismantle the impeller remove the nut (28.04).
Others parts should not be dismantled.
For ED, EDV.
To inspect the impeller (28.00), to clean the internal
parts and to check whether the impeller turns freely
when moved by hand, remove the nuts or the screws
(12.20) and casing cover (12.00).
To dismantle the impeller remove the nut (28.04).
8.4. Mechanical seal inspection
If the mechanical seal (36.00) and the oil chamber
are to be inspected, follow these instructions.
CAUTION: there may be slight pressure in
the oil chamber.
Care must be taken to avoid a sudden spur-
ting of oil.
Once the plug (34.08) with washer have been remo-
ved, adjust the hole to the downward position and
empty the chamber completely.
Do not dispose of the waste oil in the enviroment.
The mechanical seal (36.00) can be inspected by
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IST ED_ED_04_2015:MXS 11_03con gall 14/04/15 17:45 Pagina 13