Fields Of Application - Zenit GRS Manuel De Première Installation

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First installation manual – Translation of original instructions
Carefully read this manual and keep it in a clean and easily accessible
place for future reference.
An extended version of the manual relating to the installation, use and
maintenance of each model is contained in the Download area of the web-
site www.zenit.com
EN

1. FIELDS OF APPLICATION

These products are intended for use in residential, industrial and municipal sew-
age treatment plants and lifting stations.
They are designed to lift and pump slurries, faecal material, clean water, waste
water or water soiled with solid or fibrous materials.
They may not be used with liquids for human consumption or in potentially ex-
plosive atmospheres.
DGE: slightly soiled biological wastewaters and sewage containing solid bodies
from 40 to 50mm. Suitable for domestic and residential use.
DGO/DGI: heavy-duty applications with soiled biological wastewaters, sewage,
rainwater and seepage containing solid bodies from 40 to 80mm
DGN: wastewater, containing solid bodies from 65 to 150mm, in treatment
plants, sewer systems, livestock farms, industry and agriculture.
DGP: heavy-duty applications with wastewater containing solid bodies from 60
to 102mm, in treatment plants, sewer systems, livestock farms, industry and
agriculture.
DGX: strongly corrosive or aggressive strained liquids containing solid bodies
from 20 to 60mm, especially in the chemical industry.
DGB: chemically aggressive soiled liquids, dyes and seawater containing solid
bodies up to 38mm. These units are therefore ideal for applications in the
tanning industry, the paper industry and the shipping sector.
DGG: biological liquids and wastewater containing solid bodies from 40 to
150mm in civil and industrial lifting, wastewater treatment plants and live-
stock farms.
DRE: clear or slightly soiled wastewaters containing solid bodies up to 15mm,
strained water, rainwater, seepage and water pumped from underground.
Suitable for specifically domestic use.
DRO: clear or slightly soiled wastewaters containing solid bodies up to 15mm,
strained water, rainwater, seepage and water pumped from underground.
Suitable for heavy-duty domestic and professional applications.
DRN: sewage systems and livestock farms, it is particularly suitable for the treat-
ment of liquids containing suspended solids from 40 to 100mm or filaments,
and low or medium density activated sludges.
DRP: heavily soiled wastewater, activated sludges and solid bodies from 35 to
125 mm. Particularly suitable for wastewater treatment plants, sewer sys-
tems, civil lifting systems and the paper, tanning and leather industries.
DRX: strongly corrosive or chemically aggressive liquids containing solid bod-
ies up to 15mm, especially in the chemical industry, this unit is for a specific
industrial application.
DRB: chemically aggressive strained liquids, dyes and seawater containing solid
bodies up to 15mm. Can be used for applications in the tanning industry and
the shipping sector.
DRY: strongly corrosive or chemically aggressive liquids containing solid bodies
from 43 to 80mm, especially in the chemical industry, this unit is for a specific
industrial application.
DRG: industrial and process waters, civil lifting, drainage and lifting of wastewa-
ter containing solid bodies from 15 to 120mm.
GRS/GRE: soiled wastewaters containing filaments or fibres, and unstrained
household sewage in general. Equipped with grinding system.
GRI: soiled wastewaters containing filaments or fibres, and heavy-duty applica-
tions with unstrained civil wastewaters in general. Equipped with grinding
system.
GRN: liquids containing suspended solids or fibres, and low or medium density
activated sludges. Equipped with grinding system.
GRP: liquids containing suspended solids or fibres, and low or medium density
activated sludges. Equipped with grinding system.
GRG: liquids containing fibres and filaments, professional and industrial applica-
tions, livestock farms. Equipped with grinding system.
APS/APE: clear wastewater, rainwater and seepage containing small amounts
of sand and solid bodies up to 7mm.
APN/APP/APG: clear and sandy wastewater, rainwater and seepage containing
solid bodies up to10mm. Suitable for use in agriculture, irrigation and the fish
processing sector.
SME: wastewater containing solid bodies up to 50mm in small sewer systems,
livestock farms, the food industry, agriculture and irrigation.
SMI: wastewater containing solid bodies up to 50mm from public establish-
ments, small sewer systems, livestock farms, the food industry, agriculture
and for irrigation.
SMN: civil and industrial wastewater treatment plants, for lifting in sewer sys-
tems and for pumping industrial sludges. Transporting rainwater and recy-
cling raw or activated sludges and biological liquids containing solid bodies
up to 100mm.
SMP: wastewater treatment, residential and sewer plants and for the treatment
of wastewater from public establishments. Suitable for pumping industrial
sludges containing solid bodies from 53 to 130mm.
MAI: wastewater containing solid bodies up to 50 mm from public establish-
ments, small sewer systems, livestock farms, the food industry and agricul-
ture.
MAN: unstrained soiled biological wastewaters and sewage containing solid
bodies from 40 to 100mm for civil lifting applications, wastewater treatment
6
plants, sewer systems, livestock farms, industry and agriculture.
SBN/SBP: lifting sewage, pumping industrial sludges, rainwater and recycling
raw or activated sludges and biological liquids containing solid bodies from
90 to 140mm for SBN and from 36 to 140mm for SBP.
2. HANDLING AND SHIPPING
NEVER use the power cable or the float switch cable to lift or move the
pump.
Always use the appropriate handle or lifting hook.
For models weighing 25kg or less lifting and moving may be performed manually
using the handle fitted on the upper part of the pump.
For models weighing more than 25kg and in all cases where it is not possible
to maintain a correct and natural posture, lifting and moving must be carried out
using a rope or chain attached to lifting hook or handle fitted on the upper part of
the pump, and an appropriate mechanical device.
Check that there is no visible damage to the packaging and its contents If there
is any sign of significant damage, contact Zenit immediately.
Check that the characteristics recorded on the metal plaque correspond to the
product purchased
3. CHECKING IMPELLER ROTATION
(DRE-DGE-DRO-DGO models only)
Before installing and/or starting the pump after a long period out of use, check that
the impeller turns freely by proceeding as follows (Fig. 1 a-b-c-d-e-f page 74):
- take the precautions detailed in the "Safety warnings" manual;
- make sure that the pump is disconnected from the electricity supply;
- lie the pump on a flat surface;
- (for DR models only) unscrew the intake strainer retainer screw using a 3 mm
Allen key;
- insert a socket wrench into the intake and engage it with the impeller fixing
screw; for DRE and DGE50 and 75 models a 17 mm spanner is required. For
DRE and DGE100, 150 and 200 models and all DRO and DGO models a 13 mm
spanner is required.
- turn the wrench clockwise and anti-clockwise 3-4 times to ensure that the im-
peller rotates freely;
- (for DR models only) replace the strainer.
4. DETERMINING THE ROTATION DIRECTION OF THE IMPELLER (only for
three-phase models)
Before proceeding to definitively connecting the three-phase models, the correct
rotation direction of the impeller must be determined.
An adhesive label is applied to the electric pump which indicates the correct
rotation direction of the impeller (green arrow) and the direction of the relevant
fluid hammer (red arrow).
Proceed as follows:
Models up to 1.5 kW
1. apply the precautions outlined in the "Safety Warnings" manual;
2. lay the electric pump on one side horizontally and leave it free; if necessary,
use the wooden wedges to limit its movement.
3. temporarily connect the yellow-green conductor to the ground socket on the
plant and subsequently connect the power supply cables to the contactor;
4. move people and objects from the electricpump at a distance of at least 1
metre;
5. activate the gear switch for a few short instances;
6. check rotation is anti-clockwise by looking at the impeller when stopped via
the suction inlet or grid.
Models over 1.5 kW
1. apply the precautions outlined in the "Safety Warnings" manual
2. position the electric pump by resting it at the feet of the support or at the base;
3. secure the electric pump with an adequately sized chain or rope by hooking
it to the upper handle to avoid accidental falls which could affect the fluid
hammer.
WARNING the fluid hammer can be very strong. Keep your distance from the
electric pump during the procedure.
4. temporarily connect the yellow-green conductor to the ground socket on the
plant and subsequently connect the power supply cables to the plant;
5. move people and objects from the electric pump at a distance of at least 1
metre;
6. activate the gear switch for a few short instances;
7. check rotation is anti-clockwise by looking at the impeller when stopped via
the suction inlet or grid when possible or by verifying the direction of the fluid
hammer is according to the direction indicated by the red arrow indicated on
the label applied to the electric pump.
In the event the rotation direction is the opposite, invert the connection of two
of the three power supply conductors and try again, repeating the operations
described.
Having established the connection corresponding to the correct rotation direc-
tion, MARK the exact connection sequence of the cables to the plant, DEAC-
TIVATE the temporary electrical connection and install the electric pump in the
planned position.
Proceed to the definitive electrical connection by firstly connecting the yellow-
green conductor to the ground, then the other conductors.
water solutions