Page 1
Original installation and operating instructions.
Caution
Note
CONTENTS
Page
1. Symbols used in this document 8
2. General description 8
2.1 Applications 10
3. Operating conditions 10
3.1 Installation depth 10
3.2 Operating pressure 10
3.3 Operation 10
3.4 pH value 10
3.5 Liquid temperature 10
3.6 Density of pumped liquid 10
4. Approvals 11
4.1 Approval standards 11
4.2 Explanation to Ex approval 11
5. Identification 12
5.1 Nameplate 12
5.2 Type key 13
6. Safety 14
7. Transportation and storage 14
8. Installation 14
8.1 Installation on auto coupling 15
8.2 Free-standing submerged installation 16
9. Electrical connection 16
9.1 CIU unit (communication interface) 17
9.2 Electrical connection – single-phase
pumps 17
9.3 Electrical connection – three-phase
pumps 17
9.4 Alarm relay/communication connection 17
10. Configuration 18
10.1 Default settings 18
10.2 Pump alternation 18
10.3 Start level set 18
10.4 Thermal switches 19
11. Start-up 19
11.1 Before start-up 19
11.2 Operating modes 20
11.3 Direction of rotation 20
11.4 Resetting the pump 20
12. Maintenance and service 20
12.1 Recommended cleaning intervals
for sensors in standard pumps 21
12.2 Required cleaning intervals for
sensors in explosion-proof pumps 21
12.3 Inspection intervals 21
12.4 Adjustment of impeller clearance 22
12.5 Cleaning the pump housing 22
12.6 Cleaning the sensors 22
12.7 Checking/replacing the shaft seal 22
12.8 Oil change 23
12.9 Service kits 24
12.10 Built-in protection 25
12.11 Contaminated pumps 25
13. Fault finding chart 26
13.1 Megging 26
14. Technical data 27
14.1 Supply voltage 27
14.2 Enclosure class 27
14.3 Ex protection 27
14.4 Insulation class 27
14.5 Pump curves 27
14.6 Sound pressure level 27
15. Disposal 27
Warning
Prior to installation, read these
installation and operating instructions.
Installation and operation must comply
with local regulations and accepted
codes of good practice.
1. Symbols used in this document
Warning
If these safety instructions are not
observed, it may result in personal
injury!
Warning
If these instructions are not observed,
it may lead to electric shock with
consequent risk of serious personal
injury or death.
Warning
These instructions must be observed
for explosion-proof pumps. It is
advisable also to follow these
instructions for standard pumps.
If these safety instructions are not
observed, it may result in malfunction
or damage to the equipment!
Notes or instructions that make the job
easier and ensure safe operation.
2. General description
The electronic Grundfos DP and EF pumps
incorporate a controller and motor-protective
functions. They only need to be connected to the
mains supply.
The controller offers the following benefits:
• Built-in level and dry-running sensors.
• Built-in motor protection.
• Pump alternation.
If several pumps are installed in the same tank,
the control logic incorporated in the pump will
ensure that the load is distributed evenly among
the pumps over time.
8
Page 2
• Alarm relay output.
The pump incorporates an alarm relay output.
NC and NO are available and can be used as
required, for example for acoustic or visual
alarms.
• Anti-seizing system.
The anti-seizing system starts the pump at
programmed intervals to prevent the impeller
from seizing up.
• Random start delay.
This function ensures an even mains load when
several pumps are started at the same time after
an unintentional power cut.
The DP and EF pumps are portable and designed for
pumping domestic and industrial wastewater.
Two types of pumps are available:
• DP 10.50 and DP 10.65 drainage pumps
• EF 30.50 effluent pumps.
The pumps are designed for free-standing
installation.
DP 10.65.26 pumps can be installed on an autocoupling system.
Warning
Special conditions for safe use of
DP and EF explosion-proof pumps:
• Bolts used for replacement must be
class A2-70 or better according to
EN/ISO 3506-1.
• The thermal switch in the stator
windings with a nominal switch
temperature of 150 °C shall
guarantee the disconnection of the
supply; the resetting of the supply
shall be manually.
Fig. 1 DP 10.50 pump
Fig. 2 DP 10.65 pump
Fig. 3 EF 30.50 pump
Explanation to figures 1, 2 and 3:
Pos. Description
1 Cable plug
2Unit
3 Discharge port
4 Discharge flange DN 65, PN 10
5 Lifting bracket
6 Stator housing
7 Level sensor
8 Oil screw
9Clamp
10 Dry-running sensors
11 Pump foot
TM04 4857 2109
12 Pump housing
TM04 4858 2109TM04 4859 2109
9
Page 3
2.1 Applications
DP 10 pumps are designed for pumping
• drainage and surface water
• groundwater
• industrial process water without solids or fibres.
EF 30 pumps are designed for pumping
• drainage and surface water with sm all impur ities
• wastewater with fibres, e.g. from laundries
• wastewater without discharge from toilets
• wastewater from commercial buildings without
discharge from toilets.
The compact design makes the pumps suitable for
both temporary and permanent installation.
The pumps are designed for free-standing
installation.
DP 10.65.26 pumps can be installed on an autocoupling system.
2.1.1 Potentially explosive environments
Use explosion-proof pumps for applications in
potentially explosive environments.
Warning
The explosion protection classification
of the pump is CE II 2 G, Ex bcd IIB
T4 Gb.
The classification of the installation
site must in each individual case be
approved by the local fire-fighting
authorities.
Warning
The pumps must under no
circumstances pump combustible
liquids.
3. Operating conditions
The pumps are designed for intermittent operation
(S3). When completely submerged, the pumps can
also operate continuously (S1). See section
11.2 Operating modes.
The EF pumps are suitable for pumping effluent and
other liquids with solids up to 30 mm.
3.1 Installation depth
Maximum 10 metres below liquid level.
3.2 Operating pressure
Maximum 6 bar.
3.3 Operation
Maximum number of starts per hour, see WebCAPS
on www.grundfos.com.
3.4 pH value
Pumps in permanent installations can be used for
pumping liquids with a pH value between 4 and 10.
3.5 Liquid temperature
0 °C to +40 °C.
For short periods (maximum 15 minutes) a
temperature of up to +60 °C is allowed (standard
versions only).
Warning
Explosion-proof pumps must never
pump liquids with a temperature higher
than 40 °C.
3.6 Density of pumped liquid
Maximum 1000 kg/m3.
In the case of higher values, see WebCAPS on
www.grundfos.com, or contact Grundfos.
10
Page 4
4. Approvals
The standard versions of the DP and EF pumps have
been tested by VDE.
The explosion-proof versions have been approved
by KEMA according to the ATEX directive.
4.1 Approval standards
All versions have been approved by LGA (notified
body under the Construction Products directive)
according to EN 12050-1 and EN 12050-2.
4.2 Explanation to Ex approval
The explosion protection classification of the pump is Europe CE 0344 II 2 G Ex bcd IIB T4 Gb.
Directive/
standard
ATEX
Harmonised
European
standard
IEC countries (Australia and others) Ex d IIB T4 Gb.
Directive/
standard
IEC 60079-0
and
IEC 60079-1
Code Description
CE
0344
Gb Equipment protection leve l (IEC).
Code Description
IP68 = Enclosure class according to IEC 60529.
CE mark of conformity according to the ATEX directive 94/9/EC, Annex X.
=
0344 is the number of the notified body which has certified the quality system
for ATEX.
= Explosion protection mark.
Equipment group according to the ATEX directive, Annex II, point 2.2, defining
II =
the requirements applicable to the equipment in this group.
Equipment category according to the ATEX directive, Annex II, point 2.2,
2=
defining the requirements applicable to the equipment in this category.
G = Explo sive atmospheres caused by gases, vapours or mists.
Ex = The equipment conforms to the harmonised European standard.
b Control of ignition sources according to EN 13463-6: 2005.
c Constructional safety according to EN 13463-5: 2003 and EN 13463-1: 2009.
d = Flame-proof enclosure according to EN 60079-1: 2007.
II = Suitable for use in explosive atmospheres (not mines).
Classification of gases according to EN 60079-0: 2006, Annex A.
B=
Gas group B includes gas group A.
T4 = Maximum surface temperature is 135 °C according to EN 60079-0: 2006.
The equipment is subject to special conditions for safe use. The conditions are
X=
mentioned in the certificate and these installation and operating instructions.
Ex = The equipment conforms to the harmonised European standard.
d = Flame-proof enclosure according to IEC 60079-1: 2007.
II = Suitable for use in explosive atmospheres (not mines).
Classification of gases according to IEC 60079-0: 2006, Annex A.
B=
Gas group B includes gas group A.
T4 = Maximum surface temperature is 135 °C according to IEC 60079-0: 2006.
The equipment is subject to special conditions for safe use. The conditions are
X
mentioned in the certificate and these installation and operating instructions.
11
Page 5
5. Identification
Type:
AUTO
ADAPT
Model:
P.c. IP68 m
Hmax: m
Motor:
~
P1: kW kW
n:
VA
Hz
Qmax: l/s
Tmax: °C
P2:
&RVij
opr.: μ FWeight: kg
Insul. class:
min
-1
Made in Hungary
96770195
2
3
4
5
6
7
8
9
10
11
12
13
14
15
17
18
19
20
21
22
23
24
25
1
16
26
5.1 Nameplate
The nameplate states the operating data and
approvals applying to the pump. The nameplate is
fixed to the side of the stator housing opposite the
unit.
The additional nameplate supplied with the pump
can be fixed close to the tank.
Fig. 4 Name plate
Pos. Description Pos. Description Pos. Description
1 Version 10 Number of phases 19 Maximum liq uid temperature
2 Type designation 11 Rated input power 20 Output power
3 Product number 12 Rated speed 21 Power factor
4 Ex mark 13 Rated voltage 22 Rated current
5 ATEX certificate 14 Weight (without cable) 23 Operating capacitor
6 IEC Ex mark 15 Pump approval 24 Frequency
7 IEC Ex certificate 16 Enclosure class 25 Insulation class
8 Production code 17 Maximum installation depth 26 Country of origin
9 Maximum head 18 Maximum flow
12
TM04 4459 1309
Page 6
5.2 Type key
Example DP10.50.15.E.Ex.2.1.502 DP 10 .50 .15 .E .Ex .2 .1 .5 02
Type range
Grundfos sewage pumps
Material
Standard, cast iron
Maximum spherical impeller clearance [mm]
Pump discharge
Nominal diameter of pump discharge port [mm]
Output power, P2
P2 = Code from type designation/10 kW
Equipment in pump
E=version
Pump version
Blank = Standard version of submersible wastewater pumps
Ex = The pump is designed according to the ATEX standard stated or Australian
standard, AS 2430.1.
Number of poles
2 poles, n = 3000 min
Number of phases
1 = Single-phase motor
Blank = Three-phase motor
Mains frequency
5 = 50 Hz
Voltage and starting method
02 = 230 V, direct-on-line starting
0B = 400-415 V, direct-on-line starting
Generation
Blank = 1st generation
A = 2nd generation
B = 3rd generation, etc.
The pumps belonging to the individual generations differ in design, but are similar in terms of power rating.
Material in pump
Blank = Standard material in pump
-1
, 50 Hz
13
Page 7
6. Safety
Note
Caution
Warning
The use of this product requires
experience with and knowledge of the
product.
Persons with reduced physical,
sensory or mental capabilities must not
use this product, unless they are und er
supervision or have been instructed in
the use of the product by a person
responsible for their safety.
Children must not use or play with this
For safety reasons, all work in tanks must be
supervised by a person outside the pump tank.
Tanks for submersible wastewater pumps contain
wastewater with toxic and/or disease-causing
substances. Therefore, all persons involved must
wear appropriate personal protective equipment and
clothing and all work on and near the pump must be
carried out under strict observance of the hygiene
regulations in force.
product.
Warning
Pump installation in tanks must be
carried out by specially trained
persons.
Work in or near wastewater collecting
tanks must be carried out according to
local regulations.
Warning
It must be possible to lock the mains
switch in position 0. Type and
requirements as specified in
EN 60204-1, 5.3.2.
Warning
Persons must not enter the installation
area when the atmosphere is explosive.
It is advisable to carry out all
maintenance and service work when
the pump is placed outside the tank.
Warning
Make sure that the lifting bracket is
tightened before attempting to lift the
pump. Tighten if necessary.
Carelessness during lifting or
transportation may cause injury to
personnel or damage to the pump.
7. Transportation and storage
The pump may be transported and stored in a
vertical or horizontal position. Make sure that the
pump cannot roll or fall over.
Check that the protective cap for the level sensor
has not been damaged during transportation.
See fig. 1, 2 or 3 (pos. 7). If the protective cap is
defective, contact your nearest Grundfos company.
All lifting equipment must be rated for the purpose
and checked for damage before any attempts to lift
the pump. The lifting equipment rating must under no
circumstances be exceeded. The pump weight is
stated on the pump nameplate.
Warning
Always lift the pump by its lifting
bracket or by means of a fork-lift truck
if the pump is fixed to a pallet. Never lift
the pump by means of the motor cable
or the hose/pipe.
The polyurethane-embedded plug prevents water
from penetrating into the motor via the motor cable.
For long periods of storage, the pump must be
protected against moisture and heat.
After a long period of storage, the pump should be
inspected before it is put into operation. Make sure
that the impeller can rotate freely. Pay special
attention to the shaft seal, cable entry and sensors.
8. Installation
Warning
Before beginning the installation,
switch off the power supply, and lock
the mains switch in position 0.
Any external voltage connected to the
pump must be switched off before
working on the pump.
Warning
Before installation and the first start-up
of the pump, check the cable for visible
defects to avoid short-circuits.
Before beginning the installation, make
sure the tank floor is even.
The additional nameplate supplied with the pump
can be fixed close to the tank.
All safety regulations must be observed at the
installation site, for instance the use of blowers for
fresh-air supply to the tank.
Prior to installation, check the oil level in the oil
chamber. See section 12. Maintenance and service.
The pumps are suitable for different installation types
which are described in sections 8.1 and 8.2.
The pump housings have an Rp 2 discharge port or
a DN 65, PN 10 flange.
14
Page 8
Note
Note
Caution
Caution
Note
Warning
Do not put your hands or any tool into
the pump suction or discharge port
after the pump has been connected to
the power supply, unless the pump has
been switched off by removing the
fuses or switching off the mains switch.
It must be ensured that the power
supply cannot be accidentally switched
on.
Warning
Only use the lifting bracket for lifting
the pump. Do not use it to hold the
pump when in operation.
We recommend always to use Grundfos
accessories to avoid malfunction due
to incorrect installation.
The pumps are designed for
intermittent operation.
When completely submerged in t he
pumped liquid, the pumps can also
operate continuously.
See section 11.2 Operating modes.
8.1 Installation on auto coupling
DP 10.65.26 pumps for permanent installation can
be mounted on a stationary auto-coupling guide rail
system or a "hookup" auto-coupling system.
Both auto-coupling systems facilitate maintenance
and service as the pump can easily be lifted out of
the tank.
DP 10.65.26 pumps have a cast DN 65, PN 10
discharge flange.
Warning
Before beginning installation
procedures, make sure that the
atmosphere in the tank is not
potentially explosive.
Make sure that the pipework is installed
without the use of undue force. No
loads from the pipework weight must
be carried by the pump. We recommend
the use of loose flanges to ease the
installation and to avoid pipe tens ion at
flanges and bolts.
Auto-coupling guide rail system, see fig. B,
page 533.
Proceed as follows:
1. Drill mounting holes for the guide rail bracket on
the inside of the tank, and fasten the guide rail
bracket provisionally with two screws.
2. Place the auto-coupling base unit on the bottom
of the tank. Use a plumb line to establish the
correct positioning. Fasten the auto coupling with
heavy-duty expansion bolts. If the bottom of the
tank is uneven, the auto-coupling base unit must
be supported so that it is level when being
fastened.
3. Assemble the discharge line in accordance with
the generally accepted procedures and without
exposing the line to distortion or tension.
4. Insert the guide rails in the auto-coupling base
unit, and adjust the length of the rails accurately
to the guide rail bracket.
5. Unscrew the provisionally fastened guide rail
bracket, fit it on top of the guide rails, and finally
fasten it firmly to the tank wall.
The guide rails must not have any axial
play as this would cause noise during
pump operation.
6. Clean out debris from the tank before lowering
the pump into the tank.
7. Fit the guide claw to the discharge port of the
pump. Then slide the guide claw down the guide
rails, and lower the pump into the tank by means
of a chain secured to the pump lifting bracket.
When the pump reaches the auto-coupling base
unit, the pump will automatically connect tightly.
8. Hang up the end of the chain on a suitable hook
at the top of the tank and in such a way that the
chain cannot come into contact with the pump
housing.
9. Adjust the length of the motor cable by coiling it
up on a relief fitting to ensure that the cable is not
damaged during operation. Fasten the relief
fitting to a suitable hook at the top of the tank.
Make sure that the cables are not sharply bent or
pinched.
10.Connect the motor cable and the monitoring
cable, if any.
Do not use elastic elements or bellows
in the pipework. Never use these
elements as a means to align the
pipework.
15
Page 9
Hookup auto-coupling system, see fig. C,
Note
Caution
page 534.
Proceed as follows:
1. Fit the crossbar in the tank.
2. Fit the adapted piece of pipe for the movable p art
of the hookup auto coupling to the pump
discharge port.
3. Fasten a shackle and a chain to the movable part
of the hookup auto coupling.
4. Clean out debris from the tank before lowering
the pump.
5. Lower the pump into the tank by means of the
chain secured to the pump lifting bracket.
6. Hang up the end of the chain on a suitable hook
at the top of the tank and in such a way that the
chain cannot come into contact with the pump
housing.
7. Adjust the length of the motor cable by coiling it
up on a relief fitting to ensure that the cable is not
damaged during operation. Fasten the relief
fitting to a suitable hook at the top of the tank.
Make sure that the cables are not sharply bent or
pinched.
8. Connect the motor cable and the monitoring
cable, if any.
8.2 Free-standing submerged installation
Pumps for free-standing submerged installation can
stand freely on the bottom of the tank or similar
location. See fig. D, page 535, and fig. E, page 536.
In order to facilitate service on the pump, fit a flexible
union or coupling to the discharge line for easy
separation.
If a hose is used, make sure that the hose does not
buckle and that the inside diameter of the hose
matches that of the discharge port.
If a rigid pipe is used, the union or coupling, nonreturn valve and isolating valve should be fitted in
the order mentioned, when viewed from the pump.
If the pump is installed in muddy conditions or on
uneven ground, it is recommended to support the
pump on bricks or a similar support.
Proceed as follows:
1. Fit a 90 ° elbow to the pump discharge port,
and connect the discharge pipe or hose.
2. Lower the pump into the liquid by means of a
chain secured to the lifting bracket of the pump.
It is recommended to place the pump on a plane,
solid foundation. Make sure that the pump is
hanging from the chain and not the cable.
3. Hang up the end of the chain on a suitable hook
at the top of the tank and in such a way that the
chain cannot come into contact with the pump
housing.
4. Adjust the length of the motor cable by coiling it
up on a relief fitting to ensure that the cable is not
damaged during operation. Fasten the relief
fitting to a suitable hook. Make sure that the
cables are not sharply bent or pinched.
5. Connect the motor cable and the monitoring
cable, if any.
If several pumps are installed in the
same tank, the pumps must be installed
at the same level in order to allow
optimum pump alternation.
9. Electrical connection
The pump must not be used with
a frequency converter.
The electrical connection should be carried out in
accordance with local regulations.
Warning
The pump must be connected to an
electrical panel in accordance with
local regulations. The electrical panel
typically includes fuses, main switch
and earth leakage circuit breaker with
a contact separation according to
EN 60204-1, 5.3.2.
It must be possible to lock the mains
switch in position 0. Type and
requirements as specified in
EN 60204-1, 5.3.2.
The pump incorporates a motorprotective circuit breaker and
all control logic.
Warning
If the pump has an Ex mark on the
nameplate, make sure that the pump
is connected in accordance with the
instructions given in this booklet.
Warning
The explosion protection classification
of the pump is CE II 2 G, Ex bcd IIB
T4 Gb. See section 4.2.
The classification of the installation
site must in each individual case be
approved by the local authorities.
The CIU unit, if used, (see section 9.1)
must not be installed in pote ntial ly
explosive environments.
Warning
On explosion-proof pumps, make sure
that an external earth conductor is
connected to the external earth
terminal on the pump using a
conductor with a secure cable clamp.
Clean the surface for external earth
connection, and fit the cable clamp.
The cross section of the earth
conductor must be at least 4 mm
type H07 V2-K (PVT 90 °) yellow/green.
Make sure that the earth connection is
protected from corrosion.
2
, e.g.
16
Page 10
Warning
Caution
2 A 230 VAC
2 A 230 VAC
Note
2 A 230 VAC
Before installation and the first start-up
of the pump, check the cable for visible
defects to avoid short-circuits.
Warning
The pump must not run dry.
The supply voltage and frequency are marked on the
pump nameplate. For voltage tolerance, see section
14.1 Supply voltage. Make sure that the motor is
suitable for the power supply available at the
installation site.
All pumps are supplied with 10 metres of cable and
a free cable end.
A possible replacement of the cable
must be carried out by Grundfos or
an authorised service workshop .
9.1 CIU unit (communication interface)
The Grundfos CIU unit (CIU = Communication
Interface Unit) is used as a communication interface
between a DP or EF pump and a main network.
The CIU unit is optional. See separate installation
and operating instructions supplied with the unit.
9.2 Electrical connection –
single-phase pumps
The pump has a patented start function which
eliminates the need of a starting capacitor. The
operating capacitor is incorporated in the pump.
9.3 Electrical connection –
three-phase pumps
The pump motor is designed so that the phase
sequence in the electrical panel is clockwise (can be
determined with a phase sequence detector).
The pump does not start unless the phase sequence
is correct.
If the dry-running sensors are covered by liquid, and
the pump does not start, the cause may be a wrong
phase sequence. Interchange L1 and L2.
Fig. 6 Wiri ng diagram for three-phase pumps
9.4 Alarm relay/communication connection
The pump incorporates an alarm relay output.
NC and NO are available and can be used as
required, for example for acoustic or visual alarms.
Alternatively, the wires 4 and 6 can be used for
external communication via a CIU unit
(communication interface).
If a CIU unit is connected, the relay
must not be used. The CIU unit
incorporates a relay which takes over
the alarm function.
See example of wiring diagram in the documentation
supplied with the CIU unit.
TM04 4298 1209
TM04 4297 1209
Fig. 5 Wiri ng diagram for si ngle-phase pumps
17
Page 11
10. Configuration
Note
Alarm
Start
Stop
Barometric pressure
Pump running
Pump running
Pump running
Start level set
Stop level
Barometric pressure
Pump running
Pump running
Pump running
Start level set
Stop le vel
10.1 Default settings
The pump is supplied from the factory with the
following default settings.
EF DP
Parameter
Start delay
(random)
Start level 25 cm – –
High-level alarm + 10 cm – –
Anti-seizing:
Interval 3 days – –
Duration 2 sec. – –
If one or more of the above parameters are to be
changed, use the optional CIU unit together with
an R100 remote control.
The CIU unit can be connected temporarily for
configuration.
For further information, see installation and
operating instructions for the CIU unit.
0.6 - 1.5 kW0.9 - 1.5
Off – –
kW
2.6 kW
10.3 Start level set
The pump start level may be affected by the
barometric pressure. In the case of long intervals
between start and stop, the start level may differ
from the set level. See examples below.
Example 1: Constant barometric pressure
The pump will start when the liquid level in the tank
has reached the set start level. Then the pump w ill
run until the liquid level reaches the stop level. When
it stops, the pump will calibrate itself in relation to the
actual barometric pressure. See fig. 8.
Fig. 8 Exam ple 1: Constant barometric pressure
Example 2: Rising barometric pressure
If the barometric pressure rises after the pump has
stopped, the pump will register this rise as a rise in
liquid level. The result may be that the pump starts
before the set start level is reached. See fig. 9.
TM04 4337 1209TM04 4338 1209
Fig. 7 Start and stop levels
10.2 Pump alternation
If several pumps (up to four) are installed in the
same tank, the control logic incorporated in the pump
will ensure that the load is distributed evenly among
the pumps over time.
Alternation is carried out according to a patented
method based on measurement of the liquid level in
the tank.
The barometric pressure may affect the
alternating sequence.
18
TM04 4862 2109
Fig. 9 Exam ple 2: Rising barometric pressure
Page 12
Example 3: Falling barometric pressure
Note
Barometric pressure
Pump running
Pump running
Pump running
Star t le v el s et
Stop level
Caution
Note
If the barometric pressure falls after the pump has
stopped, the pump will register this fall as a fall in
liquid level. The result may be that the pump starts
after the set start level was reached. See fig. 10.
Therefore, the distance between the pump stop level
and the inlet to the tank should be at least 50 cm.
See fig. 7.
Fig. 10 Example 3: Falling barometric pressure
Warning
The pump incorporates dry-running
protection based on two dry-running
sensors placed on either side of the
unit. If a dry-running sensor detects
water shortage, the pump will stop
immediately and cannot restart until the
sensors are fully submerged again.
The sensors must be cleaned at regular
intervals, depending on the deposits of
sludge on the sensors in the tank.
10.4 Thermal switches
All pumps have two sets of thermal switches
incorporated in the stator windings.
When a thermal switch is activated,
the pump will stop immediately and will
not restart until the motor windings
have cooled sufficiently.
If the pump does not restart
automatically, the pump must be reset
and restarted manually. See section
11.4 Resetting the pump.
If the pump has to be restarted
manually repeatedly, contact Grundfos
or an authorised service workshop.
11. Start-up
Warning
Before starting work on the pump,
make sure that the fuses have been
removed or the mains switch has been
switched off. It must be ensured that
the power supply cannot be
accidentally switched on.
Make sure that all protective equipment
has been connected correctly.
The pump must not run dry.
Warning
Opening the clamp when the pump is
started can lead to personal injury or
death.
Warning
The pump must not be started if a
TM04 4339 1209
After one week of operation after replacement of the
the shaft seal, the condition of the oil in the oil
chamber should be checked. See section
12. Maintenance and service for procedure.
11.1 Before start-up
Proceed as follows:
1. Remove the fuses. Check that the impeller can
2. Check the condition of the oil in the oil chamber.
3. Check that the level sensor is clean, and that the
4. Check that the dry-running sensors are clean.
5. Open the isolating valves, if fitted.
6. Lower the pump into the liquid, and insert the
7. Check that the system has been filled with liquid
8. Switch on the power supply to the pump.
When powered, the pump will start and pump down
to the dry-running level. This function can be used to
check the pump.
potentially explosive atmosphere is
present in the tank.
In case of abnormal noise or vibrations
from the pump or other pump or supply
failure, stop the pump immediately.
Do not attempt to restart the pump until
the cause of the fault has been found
and the fault corrected.
rotate freely. Turn the impeller by hand.
See also section 12.8 Oil change.
protective cap is intact.
fuses.
and vented. The pump is self-venting.
If the dry-running sensors are not
covered by liquid, the pump cannot
start.
19
Page 13
11.2 Operating modes
S1
S3
Operation
Stop
6 min.4 min.
10 min.
P
t
P
t
Note
The pumps are designed for intermittent operation
(S3). When completely submerged, the pumps can
also operate continuously (S1).
Fig. 11 Operation levels
• S3, intermittent operation:
The electronics of the pump will in due time s top
the pump automatically. The operating mode S3
means that within 10 minutes the pump must run
for 4 minutes and be stopped for 6 minutes.
See fig. 12.
In this operating mode, the pump is partly
submerged in the pumped liquid, i.e. the liquid
level reaches at minimum the middle of the motor.
See fig. 11.
11.3 Direction of rotation
All single-phase pumps are factory-wired for the
correct direction of rotation.
The electronics incorporated in three-phase pumps
ensures that the pump does not start with a wrong
phase sequence, and consequently wrong direction
of rotation.
If the pump does not run, and the liquid level is
above the dry-running sensors, interchange L1 and
L2.
The pump rotates clockwise when
viewed from above. When started, the
pump will jerk in the opposite direction
of the direction of rotation.
TM04 4861 2109TM04 4527 1509TM04 4528 1509
Fig. 14 Jerk direction
11.4 Resetting the pump
To reset the pump, switch off the power supply to the
pump for 1 minute, and switch it on again.
TM04 4863 2109
Fig. 12 S3 operation
• S1, continuous op eration :
In this operating mode, the pump can operate
continuously without having to be stopped for
cooling. See fig. 13. Being completely submerged,
the pump is sufficiently cooled by the surrounding
liquid. See fig. 11.
Fig. 13 S1 operation
20
12. Maintenance and service
Warning
Before starting work on the pump,
make sure that the fuses have been
removed or the mains switch has been
switched off. It must be ensured that
the power supply cannot be
accidentally switched on.
All rotating parts must have st opped
moving.
Warning
Except for service on the hydraulic
part, all other service work must be
carried out by Grundfos or an
authorised service workshop approved
for servicing Ex products.
Before carrying out maintenance and service, it must
be ensured that the pump has been thoroughly
flushed with clean water. Rinse the pump parts in
water after dismantling.
Page 14
Warning
Note
Note
Note
When slackening the screws of the oil
chamber, note that pressure may have
built up in the chamber. Do not remove
the screws until the pressure has been
fully relieved.
The cleaning intervals in section 12.1
are stated as guidelines and should be
matched to the specific tank.
For explosion-proof pumps, the
cleaning intervals in section 12.2 must
be observed.
During long periods of inactivity, it is
recommended to check the function of
the pump.
12.1 Recommended cleaning intervals for
sensors in standard pumps
For cleaning of sensors, see section 12.6.
Wastewater
Wastewater
containing
grease
3 months 6 months 12 months
containing
dry solid
matter or
fibres
Wastewater
without
grease, dry
solid matter or
fibres
12.2 Required cleaning intervals for
sensors in explosion-proof pumps
For cleaning of sensors, see section 12.6.
Wastewater
containing
grease
3 months 6 months 6 months
Wastewater
containing
dry solid
matter or
fibres
Wastewater
without
grease, dry
solid matter or
fibres
12.3 Inspection in ter vals
Warning
Except for service on the hydraulic
part, all other service work must be
carried out by Grundfos or an
authorised service workshop approved
for servicing Ex products.
Pumps running normal operation should be
inspected every 3000 operating hours or at least
once a year. If the dry-solid content of the pumped
liquid is very high or sandy, check the pump at
shorter intervals.
Check the following points:
• Power consumption
See pump nameplate.
• Oil level and oil condition
When the pump is new or after replacement of the
shaft seal, check the oil level after one week of
operation.
If the oil contains more than 20 % water, the shaft
seal may be defective. The oil should be changed
every 3000 operating hours or at least once a
year.
Use Shell Ondina 917 oil or similar type.
See sections 12.8 Oil change and 12.9 Service
kits.
• For cleaning of sensors, see section 12.6.
Used oil must be disposed of in
accordance with local regulations.
The table states how much oil the pumps must have
in the oil chamber:
Pump type
DP and EF pumps
up to 1.5 kW
DP pumps, 2.6 kW 0.42
• Cable entry
Make sure that the cable entry is watertight and
that the cables are not sharply bent and/or
pinched.
See section 12.9 Service kits.
• Pump parts
Check the impeller, pump housing, etc. for
possible wear. Replace defective parts.
See section 12.9 Service kits.
• Ball bearings
Check the shaft for noisy or heavy operation
(turn the shaft by hand). Replace defective ball
bearings.
A general overhaul of the pump is usually required
in case of defective ball bearings or poor motor
function. This work must be carried out by
Grundfos or an authorised service workshop.
Quantity of oil
in oil chamber [l]
0.17
21
Page 15
12.4 Adjustment of impeller clearance
Caution
Caution
Note
For position numbers, see page 552, 553 or 554.
Proceed as follows:
1. DP pumps only: Slacken and remove the screws
(pos. 188c) holding the suction strainer (pos. 84).
Remove the strainer.
2. Slacken the locking screws (pos. 188b).
3. Slacken the adjusting screws (pos. 189), and
push the wear plate until it touches the impeller.
4. Tighten the adjusting screws so that the wear
plate still touches the impeller. Then slacken all
the adjusting screws about half a turn.
The impeller must be able to rotate
freely without touching the wear plate.
5. Tighten the locking screws.
6. Rotate the impeller by hand to check that it is not
touching the wear plate.
7. DP pumps only: Fit the suction strainer. Fit and
tighten the screws (pos. 188c).
See also section 12.5 Cleaning the pump housing .
Fig. 15 Pump viewed from suction port
12.5 Cleaning the pump housing
For position numbers, see page 552, 553 or 554.
To clean the pump housing, proceed as follows:
Dismantling
1. Loosen and remove the clamp (pos. 92) holding
the pump housing and motor together.
2. Lift the motor part out of the pump housing
(pos. 50). The impeller is removed together with
the motor part.
3. Clean the pump housing and the impeller.
Assembly
1. Place the motor part with impeller in the pump
housing.
2. Fit and tighten the clamp.
See also section 12.7 Checking/replacing the shaft
seal.
12.6 Cleaning the sensors
Fig. 16 Position of level and dry-running sensors
Proceed as follows:
See fig. 16.
1. Level sensor (pos. 7):
Flush the sensor with clean water.
Dry-running sensors (pos. 10):
Flush the dry-running sensors with clean water
and clean using a soft brush.
2. Switch on the power supply to the pump.
3. Check that the pump starts and pumps down to
the dry-running level.
To avoid damaging the sensors, do not
use other cleaning aid than those
mentioned above.
If the dry-running sensors are not
TM04 4795 2109
covered by liquid, the pump cannot
start.
12.7 Checking/replacing the shaft seal
To make sure that the shaft seal is intact, the oil
should be checked.
If the oil contains more than 20 % water, the shaft
seal may be defective and must be replaced. If the
shaft seal is nevertheless used, the motor w ill be
damaged.
If the oil is clean, it can be reused. See also section
12. Maintenance and service.
For position numbers, see page 552, 553 or 554.
TM04 4860 2109
22
Page 16
To check the shaft seal, proceed as follows:
Note
Note
Oil filling
Oil level
1. Loosen and remove the clamp (pos. 92) holding
the pump housing and motor together.
2. Lift the motor part out of the pump housing
(pos. 50). The impeller is removed together with
the motor part.
3. Remove the screw (pos. 188a) from the shaft
end.
4. Remove the impeller (pos. 49) from the shaft.
5. Drain the oil from the oil chamber.
See section 12.8 Oil change.
Used oil must be disposed of in
accordance with local regulations.
Warning
When slackening the screws of the oil
chamber, note that pressure may have
built up in the chamber. Do not remove
the screws until the pressure has been
fully relieved.
The shaft seal is a complete unit for all pumps.
6. Remove the screws (pos. 188a) securing the
shaft seal (pos. 105).
7. Lift the shaft seal (pos. 105) out of the oil
chamber according to the lever principle using
the two dismounting holes in the shaft seal
carrier (pos. 58) and two screwdrivers.
8. Check the condition of the shaft where the
secondary seal of the shaft seal touches the
shaft. The bush (pos. 103) fitted to the shaft must
be intact. If it is worn and must be replaced,
the pump must be checked by Grundfos or
an authorised service workshop.
If the shaft is intact, proceed as follows:
1. Check/clean the oil chamber.
2. Lubricate the faces in contact with the shaft seal
with oil (pos. 105a) (O-rings and shaft).
3. Insert the new shaft seal (pos. 105) using the
plastic bush included in the kit.
4. T ighten the screws (pos. 188a) securing the shaft
seal to 16 Nm.
5. Fit the impeller. Make sure that the key (pos. 9a)
is fitted correctly.
6. Fit and tighten the screw (pos. 188a) securing
the impeller to 22 Nm.
7. Fit the pump housing (pos. 50).
8. Fit and tighten the clamp (pos. 92).
9. Fill the oil chamber with oil. See section 12.8 Oil
change.
For adjustment of impeller clearance, see section
12.4 Adjustment of impeller clearance.
12.8 Oil change
Every 3000 operating hours or at least once a year,
change the oil in the oil chamber as described below.
If the shaft seal has been changed, the oil must be
changed as well. See section 12.7 Checking/
replacing the shaft seal.
Draining of oil:
Warning
When slackening the screws of the oil
chamber, note that pressure may have
built up in the chamber. Do not remove
the screws until the pressure has been
fully relieved.
1. Slacken and remove both oil screws to allow all
the oil to drain from the chamber.
2. Check the oil for water and impurities. If the shaft
seal has been removed, the oil will give a goo d
indication of the condition of the shaft seal.
Used oil must be disposed of in
accordance with local regulations.
Oil filling, pump lying down:
See fig. 17.
1. Place the pump in such a position that it is lying
on the stator housing and the discharge flange
and that the oil screws are pointing upwards.
2. Fill oil into the oil chamber through the upper hole
until it starts running out of the lower hole. The oil
level is now correct.
For oil quantity, see section 12.3 Inspection
intervals.
3. Fit both oil screws using the packing material
included in the kit.
See section 12.9 Service kits.
Oil filling, pump in upright position:
1. Place the pump on a plane, horizontal surface.
2. Fill oil into the oil chamber through one of the
holes until it starts running out of the other hole.
For oil quantity, see section 12.3 Inspection
intervals.
3. Fit both oil screws using the packing material
included in the kit.
See section 12.9 Service kits.
TM04 4796 2109
Fig. 17 Oil filling holes
23
Page 17
12.9 Service kits
Warning
Before starting work on the pump, make sure that the fuses have been removed or the mains
switch has been switched off. It must be ensured that the power supply cannot be
accidentally switched on.
All rotating parts must have stopped moving.
The service kits in the table below are available for all pumps.
The kits can be ordered as required.
Service kit Contents Pump type Material Prod uct number
0.6 - 1.5 kW
Shaft seal kit Shaft seal complete
2.6 kW
0.6 - 1.5 kW
O-ring kit O-rings and gaskets for oil screws
2.6 kW
EF 30.50.06 96115101
EF 30.50.09 96115109
Impeller
Oil
Lifting bracket Lifting bracket and screw
Power plug
Protective cap
for level sensor
Level sensor
Dry-running
sensor
unit
Single-phase
unit
Three-phase
Pt1000 sensor Pt1000 sensor and bracket All types 96984143
Impeller complete with adjusting
screw, shaft screw and key
1 litre of oil, type Shell Ondina 917.
See section 12. Maintenance and
service for required quantity in oil
chamber.
Plug for power supply and O-rings for
cover
Protective cap and O-rings for cover
and sensor
Level sensor, protective cap and
O-rings for cover and sensor
Dry-running sensor and O-rings for
cover and sensor
Cover with electronics and O-rings for
cover
Cover with electronics and O-rings for
cover
EF 30.50.11 96115102
EF 30.50.15 96115103
DP 10.50.09 96115104
DP 10.50.15 96115105
DP 10.65.26 96115106
All types 96076171
0.6 - 1.5 kW 96984147
2.6 kW 96984148
All types 96984144
All types 96898081
Standard pumps 96898082
Ex pumps 96984130
Standard pumps 96898083
Ex pumps 96984131
Single-phase
pumps
Single-phase
Ex pumps
Three-phase
pumps
Three-phase
Ex pumps
BQQP 96106536
BQQV 96645161
BQQP 96076123
BQQV 96645275
NBR 96115107
FKM 96646049
NBR 96115108
FKM 96646060
96898085
96984145
96898086
96984146
24
Page 18
Service kit Contents Pump type Material Product number
Caution
Operating
capacitor
Operating capacitor, Pt1000 sensor,
bracket and O-rings for cover
A possible replacement of the cable must be carried out by Grundfos or an authorised service
workshop.
All single-phase
pumps
96984142
12.10 Built-in protection
The motor incorporates an unit which protects the
motor in various situations.
In case of overload, the built-in overload protection
will stop the pump for 5 minutes. After that period,
the pump is ready to restart if the start conditions are
fulfilled.
To reset the pump, switch off the power supply for
1 minute.
The motor is protected in case of:
• Dry running.
• Voltage surges (up to 6000 V) in areas with high
lightning intensity. External lightning protection is
required.
• Overvoltage.
• Undervoltage.
• Overload.
• Overtemperature.
12.11 Contaminated pumps
Warning
If a pump has been used for a liquid
which is injurious to health or toxic, the
pump will be classified as
contaminated.
If Grundfos is requested to service the pump,
Grundfos must be contacted with details about the
pumped liquid, etc. before the pump is returned for
service. Otherwise Grundfos can refuse to accept
the pump for service.
Possible costs of returning the pump are paid by the
customer.
However, any application for service (no matter to
whom it may be made) must include details about
the pumped liquid if the pump has been used for
liquids which are injurious to health or toxic.
Before a pump is returned, it must be cleaned in the
best possible way.
25
Page 19
13. Fault finding chart
Warning
Before attempting to diagnose any fault, make sure that the fuses have been removed or the
mains switch has been switched off. It must be ensured that the power supply cannot be
accidentally switched on.
All rotating parts must have st opped mo ving .
Warning
All regulations applying to pumps installed in potentially explosive environments must be
observed.
It must be ensured that no work is carried out in potentially explosive atmosphere.
Fault Cause Remedy
1. The pump does not run. a) The dry-running sensors are not
2. The pump operates, but
the motor stops after a
short while.
3. The pump operates at
below-standard
performance and power
consumption.
4. The pump operates, but
delivers no liquid.
covered by liquid.
b) Three-ph ase pumps only :
The pump is connected to the
power supply with a wrong phase
sequence.
c) Fuses in electric installation
blown.
d) Supply failure; short-circuit; fault
in cable or motor winding.
e) Fault in motor electronics. Have the motor checked and repaired
f) Deposits on level or dry-running
sensors.
a) Impeller blocked by impurities.
Increased current consumption in
all three phases.
b) Increased current consumption
due to large voltage drop.
c) Too high liquid temperature. Reduce the liquid temperature.
d) Too high liquid visc osity. Dilute the liquid.
a) Discharge pipe partly blocked by
impurities.
b) Valves in the discharge pipe
partly closed or blocked.
a) Discharge valve closed or
blocked.
b) Non-return valve b locked. Clean the non-return valve.
After power-on: Allow the liquid level
to rise until the dry-running sensors
are covered with liquid.
Interchange L1 and L2.
Replace blown fuses. If the new ones
blow too, check the electric
installation and the submersible drop
cable.
Have the cable and motor checked
and repaired by a qualified
electrician.
by a Grundfos service engineer.
Clean the sensor(s).
Clean the impeller.
Check that the supply voltage is
within the range.
Clean the discharge port.
Check and clean or replace the
valves, if necessary.
Check the discharge valve, and
possibly open and/or clean it.
Vent the pump.c) Air in pump.
13.1 Megging
Megging of DP and EF pumps is not allowed, as the
built-in electronics may be damaged.
26
Page 20
14. Technical data
Subject to alterations.
14.1 Supply voltage
• 1 x 230 V – 10 %/+ 6 %, 50 Hz.
• 3 x 400 V – 10 %/+ 10 %, 50 Hz.
14.2 Enclosure class
IP68. According to IEC 60529.
14.3 Ex protection
CE II 2 G, Ex bcd IIB T4 Gb according to
EN 60079-0: 2006 and Ex d IIB T4 Gb according to
IEC 60079-0: 2006.
14.4 Insulation class
F (155 °C).
14.5 Pump curves
Pump curves are available via internet
www.grundfos.com.
The curves are to be considered as a guide.
They must not be used as guarantee curves.
Test curves for the supplied pump are available on
request.
14.6 Sound pressure level
The sound pressure level of the pumps is lower than
the limiting values stated in the EC Council Directive
98/37/EC relating to machinery.
15. Disposal
This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest
Grundfos company or service workshop.
27
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