Interpump WW961C Mode D'emploi Et D'entretien page 11

1.8 - High-pressure system components, particularly those of systems that run mainly outdoors, must
be adequately protected against the rain, frost and heat.
A suitably-calibrated overpressure valve must be installed, as well as the pressure
regulating valve, must be installed on the high-pressure line.
The high-pressure pipes must be correctly sized for the system's maximum working
pressure and used exclusively within the working pressure range indicated by the pipe
manufacturer and marked on the pipe itself.
The ends of the high-pressure pipes must be sheathed and secured to a solid structure,
so as to avoid the risk of whiplash if the connections burst or break.
The pump transmission systems (joints, pulleys, belts, rotary shafts), must be suitably
covered by a protective case.
If in doubt, do not hesitate to call the INTERPUMP GROUP Customer Engineering
Service.
2 - INSTALLATION
2.1 - The pump should be installed in a horizontal position using the supporting feet or coupled directly
to the motor using the original fl ange provided.
2.2 - The base must be fl at and rigid so as to avoid bending and misalignments along the pump/motor
coupling axis.
2.3 - The pump/motor assembly cannot be fi xed rigidly to the frame or base, anti-vibration elements
must be set in between.
2.4 - Avoid installing and using the pumps near heat sources and/or in environments where condensation
may form as this affects the effectiveness of the lubricant contained in the pump.
2.5 - Make sure that the pump never operates dry even for short periods by installing safety devices
on the system.
2.6 - For pumps with a built-in regulating valve or if the plant has the pressure regulating valve outlet
(BYPASS) connected directly to the feed inlet (IN) of the pump, the pump must not be operated in
BYPASS mode for more than 3 minutes, otherwise there will be a risk of damage to the seals and
valves caused by overheating.
For special applications, contact the Technical Department or the Customer Engineering Service.
3 - FEED LINE
To ensure the pump works to its full potential, the feed line must have the following
characteristics:
3.1 - An inside diameter at least as large as the (IN) inlet on the pump manifold; along the pipe avoid
fi tting 90° elbows, connections with other pipes, chokes, "T" connections, siphons, areas where air
bubbles may stagnate and cause head losses and cavitation.
3.2 - The lay-out must be such as to ensure, under all working conditions, a positive head of between
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