12
sticking. Then set again the coupling guards.
Power up the motor by briefly pressing the circuit-breaker and check
that it turns in the direction indicated by the arrow on the pump lan-
tern (head of the pump).
If not, interchange two phase wires on the motor terminal block or on
the motor protection relay.
6.4 Starting up
Depending on conveyed fluid and running of pump, surface
temperature can exceed 68°C. Take necessary means to
avoid injuries.
The pump must not be operated in a no-flow
condition (discharge valve closed) for more than
10 minutes with cold water (temperature below 40°C) or more than 5
minutes above 60°C (respectively 5 and 2 minutes if motor power
exceeds 22 kW).
We recommend establishing a minimum flow of about 10 % of the
rated capacity of the pump, to avoid the formation of a gas pocket
at the top of the pump.
- Keep the discharge valve closed.
- Start the pump.
- Open draining plug to drain air. If no water leaks within 20’,
close the
plug
and stop the pump, then wait 20’ to allow air to settle.
- Start again the pump.
- If necessary (particulary if the suction height exceeds 5 m) repeat
these operations.
- If water leaks at draining plug (it means the pump delivers its pres-
sure), slowly open the discharge valve.
- the pump has to be primed.
- Check pressure stability at discharge with a manometer, if instabili-
ty, perfect air draining.
- In case of failure, do the filling in again and start the operation
again.
- To perfect air draining, close the discharge valve and the draining
plug, then stop the pump 20’, start the pump again and open the
draining plug. Do it as long as air comes out.
- Open the discharge valve in order to have the wished working
point.
- Check that the current input does not exceed the value indicated
on the motor data plate.
7. SERVICING
Before any operation, switch off the pump(s).
For MULTI-VE pumps fitted with motor variator, see the specific
leaflet.
No special servicing in operation.
Always keep the pump and the motor perfectly clean.
For a prolonged shutdown, if there is no risk of frost, it is best not to
drain the pump.
On pumps equipped with greaser under bearing box (table below),
see greasing instructions written on sticker put on it.
TYPE
< 22 KW
22 kW
30 kW
37 kW
45 kW
18
36
•
60
•
•
80
•
•
•
•
100
•
•
•
•
If the motor assembling is done only by fitting into the bearing (no
screw for tightening of the coupling on the motor shaf), it is recom-
mended to grease the shaft end as well as the coupling boring with
a high adhering grease (type D321R Molikote or 8191 Loctite for
example) to facilitate any further diassembly.
For pumps equipped with coupling bush, check its good condition
before reassembling (
See Fig. below
).
Mechanical seal
The mechanical seal needs no servicing in operation.
MULTI-V 36C/60C and MULTI-V 80/100 are equipped with a cartridge
system in order to ease standard mechanical seal replacement
without disassembling the hydraulic parts (
See Fig. below
).
”Spacer” feature allows not to disassemble motor on MULTI-V
36C/60C and MULTI-V 80/100 when removing mechanical seal car-
tridge.
It must never be allowed to operate dry.
Assembly-Dismantling
Before any operation on the pump, please refer to technical leaflets:
- N° 4.047.569 (MULTI-V 18/36/60)
- N° 4.084.157 (MULTI-V 80/100).
CAUTION !
CAUTION !
ENGLISH
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