Overview; Product Description; Applications; Working Limits - ITT Lowara DLC Serie Installations- Und Bedienungsanleitungen

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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

This range of cast iron submersible electric pumps includes versions with single-channel or multi-channel impeller (DLC), with
"Self-cleaning" single-channel impeller (DLS), with Vortex-type open impeller (DLV), and the version with open impeller and
grinder device con (DLG). The electric pumps have a high-efficiency motor with class H insulation, double mechanical seal in oil
bath, oversized greased bearings, 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. A few models are equipped with a
thermal probe for motor protection, others feature a water sensor in the oil chamber ( section 5.1.3).
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
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
DLC Clean water, water containing moderate amounts of suspended solids but no chemically aggressive substances or
sand
DLG Moderately laden water, when suspended solids must be ground
DLS Non-aggressive, non-abrasive wastewater and sewage, particularly when containing fibrous substances
DLV 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 1000 kg/m
Do not use this electric pump to handle flammable 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 or partially covered by liquid (the minimum level of the liquid must
WARNING
cover two-thirds of the motor (
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 20 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
To prevent overheating of the internal pump components make sure that a minimum water flow, equivalent to the minimum
value shown on the rating plate, is always guaranteed when the pump is running.
For additional information section 10.1.
Information for installers and users
Information for installers and users
section 10.2.
3
( section 3.1.11).
section 10.3)).
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