CONTENTS
Page
1. General description 16
1.1 Applications 17
2. Safety 17
3. Transportation and storage 17
4. Installation 17
4.1 Installation on auto-coupling 17
4.2 Free-standing submerged installation 18
5. Electrical connection 18
5.1 CU 100 control box 19
5.2 Pump controllers 19
5.3 Thermal switches 20
6. Start-up 20
6.1 Operating modes 20
6.2 Direction of rotation 21
7. Maintenance and service 21
7.1 Inspection intervals 22
7.2 Adjustment of impeller clearance 22
7.3 Cleaning the pump housing 22
7.4 Checking/replacing the shaft seal 22
7.5 Oil change 23
7.6 Service kits 24
7.7 Contaminated pumps 24
8. Fault finding chart 25
9. Disposal 25
10. Technical data and operating conditions 26
Before beginning installation procedures,
these installation and operating instructions should be studied carefully. The installation and operation should also be in
accordance with local regulations and accepted codes of good practice.
1. General description
Grundfos DP and EF wastewater 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 pump.
The pumps are designed for free-standing installa-
tion.
DP 10.65.26 pumps can be installed on an auto-cou-
pling system.
The pumps can be controlled via the Grundfos
LC/D 107, LC/D 108, LC/D 110 pump controllers or
the Grundfos CU 100 control box, see installation
and operating instructions for the selected unit.
1
2
3
Fig. 1 DP 10.50 pump
1
2
4
Fig. 2 DP 10.65 pump
1
2
3
Fig. 3 EF 30.50 pump
Explanation to figures 1, 2 and 3:
Pos. Description
1 Cable plug
2 Nameplate
3 Discharge port Rp 2
4 Discharge flange DN 65, PN 10
5 Lifting bracket
6 Stator housing
7 Oil screw
8 Clamp
9 Pump housing
10 Suction strainer (DP pumps only)
5
6
7
8
9
10
5
6
7
8
9
10
5
6
7
8
9
TM02 7339 3203TM02 7340 3203TM02 7341 3203
16
1.1 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 small impurities
• 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 auto-coupling system.
1.1.1 Potentially explosive environments
Use explosion-proof pumps for applications in potentially explosive environments.
The explosion protection classification of
the pump is CE II 2 G, EEx d IIB T4.
The classification of the installation site
must in each individual case be approved
by the local fire-fighting authorities.
2. Safety
Pump installation in pits must be carried
out by specially trained persons.
For safety reasons, all work in pits must be supervised by a person outside the pump pit.
Pits 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.
3. Transportation and storage
The pump may be transported and stored in a vertical or horizontal position. Make sure that it cannot
roll or fall over.
Always lift the pump by its lifting bracket, never by
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 seals and the cable entry.
4. Installation
The loose nameplate supplied with the pump should
be fixed at the installation site or kept in the cover of
this booklet.
All safety regulations must be observed at the installation site, e.g. the use of blowers for fresh-air supply
to the pit.
Prior to installation, check the oil level in the oil
chamber, see section 7. Maintenance and service.
The pumps are suitable for different installation
types which are described in sections 4.1 and 4.2.
The pump housings have an Rp 2 discharge port or a
DN 65, PN 10 flange.
Note: The pumps are designed for intermittent operation. When completely submerged in the pumped
liquid, the pumps can also operate continuously.
See section 10. Technical data and operating condi-
tions.
4.1 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 pit.
DP 10.65.26 pumps have a cast DN 65, PN 10 discharge flange.
Before beginning installation procedures,
make sure that the atmosphere in the pit is
not potentially explosive.
Auto-coupling guide rail system, see fig. A,
page 289.
Proceed as follows:
1. Drill mounting holes for the guide rail bracket on
the inside of the pit and fasten the guide rail
bracket provisionally with two screws.
2. Place the auto-coupling base unit on the bottom
of the pit. Use a plumb line to establish the correct positioning. Fasten with heavy-duty expansion bolts. If the bottom of the pit 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 pit wall.
Note: The guide rails must not have any axial
play as this would cause noise during pump operation.
6. Clean out debris from the pit before lowering the
pump into the pit.
17
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 pit by means of
a chain fastened to the 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 pit 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 pit.
Make sure that the cables are not sharply bent
or pinched.
10. Connect the motor cable and the monitoring cable, if any.
Hookup auto-coupling system, see fig. B,
page 290.
Proceed as follows:
1. Fit the crossbar in the pit.
2. Fit the adapted piece of pipe for the movable part
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 pit before lowering the
pump.
5. Lower the pump into the pit by means of the
chain fastened to the lifting bracket.
6. Hang up the end of the chain on a suitable hook
at the top of the pit 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 pit. Make
sure that the cables are not sharply bent or
pinched.
8. Connect the motor cable and the monitoring ca-
ble, if any.
4.2 Free-standing submerged installation
Pumps for free-standing submerged installation can
stand freely on the bottom of the pit or the like, see
fig. C, page 291, and fig. D, page 292.
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/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 pit 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.
5. Electrical connection
The electrical connection should be carried out in accordance with local regulations.
The pump must be connected to an external mains switch with a minimum contact
gap of 3 mm in all poles.
If the pump is protected by means of a motor starter, this starter must be set to the
current consumption of the pump. The current consumption is stated on the pump
nameplate.
The explosion protection classification of
the pump is CE II 2 G, EEx d IIB T4.
The classification of the installation site
must in each individual case be approved
by the local fire-fighting authorities.
Control boxes and pump controllers must
not be installed in potentially explosive environments.
Make sure that all protective equipment
has been connected correctly.
Float switches used in explosive environments must be approved for this application. They must be connected to the
Grundfos LC/D 108 pump controller via the
intrinsically safe LC-Ex4 barrier to ensure
a safe circuit.
The supply voltage and frequency are marked on the
pump nameplate. The voltage tolerance must be
within –10%/+6% of the rated voltage. Make sure
that the motor is suitable for the electricity supply
available at the installation site.
All pumps are supplied with 10 metres of cable and a
free cable end.
The pump must be connected to
• a control box with motor starter, e.g. Grundfos
CU 100 control box, or
• a Grundfos LC/D 107, LC/D 108 or LC/D 110
pump controller.
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See fig. 4 or 5 and the installation and operating instructions for the selected control box or pump controller.
LN
PE
PE
123 645
T3T2 T1
150˚C160˚C
1
Fig. 4 Wiring diagram for single-phase pumps
L1PEL2 L3
PE
123 645
T3T2 T1
150˚C170˚C
3
Fig. 5 Wiring diagram for three-phase pumps
5.1 CU 100 control box
The CU 100 control box incorporates a motor starter
and is available with level switch and cable.
Single-phase pumps: An operating capacitor must
be connected to the control box.
For capacitor size, see the table:
Pump type
DP and EF 30 450
The difference in level between start and stop can be
adjusted by changing the free cable length.
Large difference in level: Long free cable.
Small difference in level: Short free cable.
• To prevent air intake and vibrations, the stop
level switch must be fitted in such a way that the
pump is stopped before the liquid level is lowered
below the upper edge of the clamp on the pump.
The CU 100 control box must not be used
for Ex applications.
See section 5.2 Pump controllers.
Cd, operating capacitor
[µF] [V]
•The start level switch should be installed in such
a way that the pump is started at the required
level; however, the pump must always be started
before the liquid level reaches the bottom inlet
pipe to the pit.
Note: Both points must be observed.
TM02 5587 4302TM02 5588 3602
Fig. 6 Start and stop levels
5.2 Pump controllers
The following LC and LCD pump controllers are
available:
LC controllers are for one-pump-installations and
LCD controllers are for two-pump-installations.
• LC 107 and LCD 107 with level pickups.
• LC 108 and LCD 108 with float switches.
• LC 110 and LCD 110 with electrodes.
In the following description, “level switches” can be
level pickups, float switches or electrodes, depending on the pump controller selected.
Controllers for single-phase pumps incorporate capacitors.
The LC controller is fitted with two or three level
switches: One for start and the other for stop of
pump. The third level switch, which is optional, is for
high-level alarm.
The LCD controller is fitted with three or four level
switches: One for common stop and two for start of
the pumps. The fourth level switch, which is optional,
is for high-level alarm.
When installing the level switches, the following
points should be observed:
• To prevent air intake and vibrations, the stop
level switch must be fitted in such a way that the
pump is stopped before the liquid level is lowered
below the upper edge of the clamp on the pump.
•The start level switch should be installed in such
a way that the pump is started at the required
level; however, the pump must always be started
before the liquid level reaches the bottom inlet
pipe to the pit.
Max.
Min.
TM02 7429 3403
19
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