Pipes; Precautions Against Frost; Warranty Conditions; Operating Faults And Their Possible Causes - Pratissoli LK Serie Manual De Uso Y Mantenimiento

h) Continue pumping for at least another minute. The
emulsion can be strengthened if necessary by adding Shell
Donax for example to the solution.
i) Stop the pump, remove the pipe from the suction
connection and close with a plug
j) Remove the hose from the high pressure exhaust. Clean,
grease and plug both pipe connections.
12.2

Pipes

a) Before greasing and protecting pipes according to
previously described procedure, dry connections with
compressed air.
b) Cover with polyethylene.
c) Do not wrap the pump too tightly and make sure there are
no folds.
13

PRECAUTIONS AGAINST FROST

Follow the instructions in Chapter 12 in areas and
times of the year at risk of frost (see par. 12.1).
In the presence of ice, do not start the pump
for any reason until the circuit has been fully
defrosted, otherwise there can be serious
damage to the pump.
14

WARRANTY CONDITIONS

The guarantee period and conditions are contained in the
purchase agreement.
The guarantee will in any case be invalidated if:
a) The pump is used for purposes other than the agreed
purposes.
b) The pump is driven by an electric motor or internal
combustion engine having performance values exceeding
those shown in the table.
c) The safety devices provided are uncalibrated or
disconnected.
d) The pump has been used with accessories or spare parts
not supplied by Interpump Group.
e) Damage has been caused by:
1) improper use
2) failure to follow maintenance instructions
3) any use different from that described in the operating
instructions
4) insufficient flow rate
5) defective installation
6) improper positioning or sizing of pipes
7) unauthorized design modifications
8) cavitation.
15 OPERATING FAULTS AND THEIR
POSSIBLE CAUSES
The pump does not produce any noise upon
start-up:
- The pump is not primed and is running dry.
- No suction water.
- Valves are jammed.
- Outlet line is closed and thus prevents the
release of air trapped in the pump manifold.
Pump pulsates irregularly:
- Air suction.
- Insufficient supply.
- Bends, elbow bends, fittings along the suction
line are choking the passage of liquid.
- The suction filter is dirty or too small.
- The booster pump, where installed, is supplying
insufficient pressure or flow rate.
- The pump is not primed for insufficient head or
the outlet is closed during priming.
- The pump is not primed due to valve jamming.
- Worn valves.
- Worn pressure seals.
- Imperfect functioning of the pressure control
valve.
- Problems on the transmission.
The pump does not supply the nominal flow rate/
excessive noise:
- Insufficient supply (see various causes as above).
- Rpm lower than the nominal speed;
- Excessive internal leakage of the pressure control
valve.
- Worn valves.
- Excessive leakage from the pressure seals.
- Cavitation due to:
1) Improper sizing of suction ducts/undersized
diameters.
2) Insufficient flow rate.
3) High water temperature.
The pressure supplied by the pump is insufficient:
- The user flow (nozzle) is or has become greater
than the pump capacity.
- Insufficient pump rpm.
- Excessive leakage from the pressure seals.
- Imperfect functioning of the pressure control
valve.
- Worn valves.
Pump overheats:
- The pump is working in overpressure conditions
or pump rpm is higher than the nominal value.
- Oil in the pump casing is not at level or is not the
recommended type as detailed in chapter 7 (see
par. 7.6).
- Joint alignment is incorrect.
- Excessive pump tilt during operation.
Vibrations or hammering on pipes:
- Air suction.
- Faulty operation of the pressure control valve.
- Valves malfunction.
- Irregular drive transmission.
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