Grundfos Multilift M Series, Installation And Operating Instructions Manual

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English (GB)
12
5. Product description
The Multilift M lifting stations are described in the following
sections:
• section
5.1 Lifting station describing the lifting station with
collecting tank, pump, non-return valve and level sensor.
• section 5.2 LC 221 controller describing the controller as well
as the functions and operation of the controller.
In section 7. Installation of lifting station and the following
sections, the above components are described as one unit.
5.1 Lifting station
The Grundfos Multilift M lifting stations are supplied complete with
single- or three-phase submersible pumps connected to the
LC 221 controller incorporating a level sensor.
Type key, lifting station
Nameplate, lifting station
Fig. 2 Nameplate, lifting station
5.1.1 Collecting tank
The gas-, odour- and pressure-tight collecting tank is made of
wastewater resistant polyethylene (PE) and has all necessary
ports for the connection of inlet pipes, discharge pipe, vent pipe
and a manually operated diaphragm pump, which is available as
an accessory.
The collecting tank has a turnable, eccentric disk in the back
allowing adjustment of the inlet to any height between 180 and
315 mm above the floor. The most common heights are marked
beside the inlet. See section
7.3 Procedure for installation of
lifting station . Furthermore, the collecting tank offers three
horizontal inlets in the sides (2 x DN 100 and 1 x DN 50), and two
vertical inlets at the top of the tank (1 x DN 150 and 1 x DN 50).
The centre of the horizontal inlets are 180 mm and 250 mm above
the floor.
The side and back inlets 180 and 250 mm above the floor are for
direct connection of a wall-hung or floor-standing toilet according
to EN 33 and EN 37. Further sanitary appliances can be
connected to the other ports.
The tank volume and effective volume (volume between start and
stop) of the collecting tank appear from the following table:
Setting to the relevant start inlet level must be made during the
start-up phase via the setup menu. See section
6.2 Setup menu .
The first step after power supply connection is a start-up phase
with level setting.
To minimise sedimentation, the tank bottom is chamfered to lead
the wastewater to the pump.
5.1.2 Pump
The pump impeller is designed as a free-flow vortex impeller,
ensuring almost unchanged performance throughout the entire
life of the pump. See the pump curves in section
12.3 Performance curves . The stator housing of the motor is
made of cast iron. The pump has a mechanical shaft seal.
See more technical data in section
12. Technical data .
Single-phase motors are protected by a thermal switch in the
windings and run via a capacitor inside the controller cabinet.
Three-phase motors are protected by a thermal switch in the
windings and an additional thermal circuit breaker in the
controller cabinet of Multilift M22, M24, M32 and M38 to cut out
the motor in case of overload.
If the phase sequence for three-phase pumps is wrong, the
controller will indicate fault and prevent the pump from starting.
For correction of phase sequence, see fig. 14. For direction of
rotation, see section
10.2 Motor .
5.1.3 Shaft seal
The pump has three shaft seals, the oil chambers in between are
filled for life and therefore require no maintenance.
For replacement in case of service, please see service
instructions.
Example M .22 .3 .4
Multilift lifting station
Output power, P
2
/ 100 [W]
1 = single-phase motor
3 = three-phase motor
2 = 2-pole motor
4 = 4-pole motor
TM
04
76
39
22
10
Pos. Description
1 Type designation
2 Product number
3 Production code (year/week)
4 Frequency [Hz]
5 Number of voltage [V]
6 Voltage [V]
7 Full-load current [A]
8 Motor input power P1 [kW]
9 CE mark
10 Duty type
11 Serial number
12 Maximum flow rate [m
3
/h]
13 Minimum head [m]
14 Maximum head [m]
15 Maximum liquid temperature [°C]
16 Maximum ambient temperature [°C]
17 Weight [kg]
18 Blank
Inlet level [mm] 180 250 315
Total tank volume [l] 92
Effective tank volume [l] 34 49 62
Note
If the motor is overloaded, it will stop
automatically.
When it has cooled to normal operating
temperature, it will restart automatically.