Operation Manual

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1. Overview
The purpose of this manual is to provide the necessary information for proper installation, operation and maintenance of the pumps/electric pumps. The
instructions and warnings provided below concern the standard version, as described in the sale documents. Special versions may be supplied with
supplementary instructions leaflets. Please refer to the sale contract for any modifications or special version characteristics. Always specify the exact
pump/electric pump type and identification code when requesting technical information or spare parts from our Sales and Service department. For
instructions, situations or events not considered in this manual or in the sale documents, please contact our Service Center nearest you.
Read this manual before installing and using the product.
Improper use may cause personal injury and damage to property, and lead to the forfeiture of the warranty coverage.
2. Product Description
Information for installers and users
The VS range features vertical multistage non-self priming pumps which can be coupled to standard electric motors.
In the VS series, all the metal parts that are in contact with the water are made of stainless steel.
3. Applications
Information for installers and users
These pumps are suitable for civil and industrial water distribution systems, irrigation (agriculture, sporting facilities), water treatment, boiler feed, parts
washing, cooling - air conditioning - refrigeration and firefighting applications.
3.1 Working Limits
3.1.1 Pumped Liquids, Pressures, Temperatures
This pump can be used to pump cold water, hot water, water with glycol (25% maximum volume). The rating plate provides information
regarding the gasket and mechanical seal materials
Do not use this electric pump to handle flammable and/or explosive liquids.
WARNING
Do not use this pump to handle liquids containing abrasive, solid or fibrous substances.
For special requirements, please contact our Sales and Service Department.
Liquid temperature
Minimum Maximum
- for household and similar purposes 0 °C + 110 °C
3.1.2 Suction
In case of negative suction head (negative pressure on suction side) make sure that the flow resistance in the suction pipe added to the suction lift
(height difference between the water source and the pump suction port) does not exceed the pump’s suction capacity, as this could cause cavitation.
WARNING
Do not use the pump if cavitation occurs, as its internal components could be damaged.
A
WARNING
Make sure that the sum of the pressure on the suction side (water system, gravity tank) and the maximum pressure delivered by
the pump does not exceed the maximum working pressure allowed (nominal pressure PN) for the pump.
R
WARNING
If you pump hot water, you must guarantee a minimum pressure on the suction side to prevent the generation of stems
3.1.3 Minimum nominal flow rate
To prevent overheating of the internal pump components, make sure that a minimum water flow is always guaranteed when the pump is running.
WARNING
Do not run the pump with the on-off valve shut on the delivery side for longer than a few seconds
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