Lowara GLS Série Instructions Pour L'installation, L'utilisation Et L'entretien page 22

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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
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
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.
Operating, installing and maintaining the electric pump in any way improper or that is not covered by this
manual may cause personal injury and damage to property, and lead to the forfeiture of the warranty
coverage.
Pay attention to possible overpressures that may result in explosions, ruptures or damages.
2. Product description
This range of cast iron submersible electric pumps includes versions with single-channel or multi-channel impeller, with "Self-
cleaning" single-channel impeller (GLS) and with Vortex-type open impeller (GLV). The electric pumps have a motor with class
H insulation, double mechanical seal in oil bath, power cable (10-metre long, supplied as standard), plugless. The single-phase
versions are without run and start capacitors, which must be provided in the electrical control panel. All the models are equipped
with a thermal probe for motor protection ( section 5.3).
3. Applications
These electric pumps are suitable for handling sewage and wastewater and draining flooded excavations and marshy ground,
with applications in the civil and industrial sectors, in building sites and agriculture.
3.1 Working limits
3.1.1 How to read the pump's rating plate
Use the electric pump following the indications reported in the dataplate.
The drawings in section 10.1 show the essential data found on the rating plates.
3.1.2 Pumped liquids
These pumps are suitable for pumping the following liquids:
Series Liquids
GLS Clean water, water containing moderate amounts of suspended solids but no chemically aggressive substances or
sand, non-aggressive, non-abrasive wastewater and sewage, particularly when containing fibrous substances
GLV Sewage containing suspended solids and fibrous substances, or sludge with high solid content
For maximum size of suspended solids,
WARNING
The density of the fluid must not exceed 1100 kg/m
The pH of the pumped liquid must be between 5.5 and 14.
Do not use this electric pump to handle flammable, abrasive, highly corrosive and/or explosive liquids.
For special requirements, please contact our Sales and Service Department.
3.1.3 Minimum and maximum immersion depth
Make sure that the motor is totally covered by liquid (
WARNING
The maximum immersion depth must not exceed 20 metres.
3.1.4 Liquid temperature
The maximum temperature of the liquid must not exceed +40° C.
WARNING
For special requirements, please contact our Sales and Service Department.
3.1.5 Number of starts per hour
The maximum number of work cycles (starts and stops) of the electric pump is 30 per hour, evenly distributed.
3.1.6 Suction
Make sure that the level of the liquid is never lower than the motor flange to prevent the inlet of air. The
WARNING
presence of air may cause damage to the electric pump and/or have an adverse effect on its
performance.
Do not use the pump if cavitation occurs, as its internal components could be damaged.
3.1.7 Minimum nominal flow rate
Do not run the pump with the on-off valve shut on the delivery side for longer than a few seconds.
WARNING
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Information for installers and users
Information for installers and users
section 10.4.
3
( section 3.1.11).
section 10.5).
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