Calpeda META, Быстрый старт

Страница: 18 / 80

EN
Page 18 / 80 META_S_Rev6-s11 - Operating Instructions
8.4. First start-up
OFF
ATTENTION: never run the pump dry. Start the pump
after filling it completely with liquid and after adjusting
the membrane pressure (chap. 8.6).
When the pump is located above the water level
(suction lift operation chap. 14 fig. 2) or with a positive
suction head which is too low (less than 1 m) to open
the non-return valve, fill the pump through the priming
hole (chap. 14 fig. 4).
ATTENTION: the pump is equipped with a non-return
valve built into the pump suction, in order to fill the
suction pipe it is necessary to prepare a filling system
on the suction pipe (chap.14 fig.4).
When the liquid level on the suction side is above
the pump (inflow under positive suction head chap.
14 fig. 1), fill the pump by opening the suction gate
valve slowly and completely, keeping the delivery gate
valve open to release the air.
Before starting, check that the shaft turns by hand. For
this purpose use the screwdriver notch on the shaft
end on the ventilation side.
8.5. Self-priming
(Capability to clear the air in the suction pipe when
starting with the pump located above the water
level ).
Conditions for self-priming:
• suction pipe with connections perfectly airtight and
properly immersed in the water to be lifted;
• allow 0,6 m minimum of straight vertical pipe above
the discharge port, before a non-return valve or a bend
chap. 14 fig. 4.
• pump casing completely filled with clean cold
water berfore start-up.
The pump is not self-priming with liquids containing
oil, alcohol or foaming substances.
The integrated check valve prevents reverse siphoning
through the pump when the pump is stopped and
retains water in the pump for the next start-up.
ATTENTION: avoid prolonged operation
with the pump not primed, without water
delivery from the completely opened outlet.
If the pump does not prime in 5 minutes:
stop the motor, remove the filler cap and
add more water.
If necessary, repeat the priming operation after the
pump has been first emptied and then completely filled
with clean cold water.
ATTENTION: When self-priming for the first
time, once the pump has been primed, it
may be necessary to stop the pump, wait a
few seconds and then restart it with all taps
opened, in order to eliminate the air inside the
pump casing completely.
During the self-priming time, if the pump does not prime
within 2 minutes, Er07
“not primed” appears. Press the enter button for the
reset and the start button to restart the pump.
8.6. Vessel pressure
Once the new re-start pressure is entered (parameter
UP01-UP02), the membrane pre-charge pressure
must be changed to 0,5 bar lower than the re-start
pressure (i.e. 2,9 bar re-start pressure, membrane at
2.4 bar) par. 14 chap. 6.
ATTENTION: Do not pre-inflate the tank membrane
over 3,5 bar; if a higher pressure is required, install an
external tank.
If the pump works for long periods of time with a flow rate
of 2 litres/min or lower it is necessary to install a tank of
maximum 8 litres.
8.7. Gate valve adjustment
With the gate valve completely open or with an outlet
pressure lower than the minimum pressure shown on
the nameplate, the pump may be noisy. To reduce
noise adjust the delivery gate valve.
8.8. Abnormal operation
Never run the pump for more than five minutes
with a closed gate valve.
Prolonged operation without a change of water in the
pump causes dangerous increases of temperature and
pressure.
Prolunged operation with a closed delivery port
causes breakage or damage to parts of the pump.
When the water is overheated due to prolonged
operation with a closed port, stop the pump before
opening the gate valve.
Do not touch the fluid when its temperature is
higher than 60 °C.
Do not touch the pump when the surface
temperature is higher than 80 °C.
Wait until the water has cooled inside the pump before
starting again or opening the draining and filling plugs.
8.9. SWITCH-OFF
ON
The appliance must be switched off every time
there are faults. (see troubleshooting).
The product is designed for continuous operation, the
switch off is performed by disconnecting the power
supply by means of the dedicated disconnecting
devices. (see paragraph “6.5 Electrical connection”).
9. MAINTENANCE
Before any operations it is necessary to disconnect the
power supply.
If required ask an electrician or an expert technician.
All maintenance operations, cleaning or repairs
performed with the electrical system connected
could cause serious injuries to people.
If the power cable 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 removing parts, the operator
must be a qualified technician able to read diagrams
and drawings.
It is advisable to keep a record of all maintenance
operations performed.
i
During maintenance, be very careful not to
allow foreign bodies to enter the circuit, even
if very small, as the safety of the device could
be compromised.
It is forbidden to perform any operations using
your bare hands. Use water-resistant, anti-cut
gloves to disassemble and clean the filter or in
other particular cases.
i
During maintenance operations external
personnel is not allowed.