Grundfos Multilift MSS Instrucciones De Instalación Y Funcionamiento página 12

5. Product description
The MSS Multilift lifting stations are described in the following
sections:
• section 5.1 Lifting station describing lifting station, collecting
tank, pump, non-return valve and level sensor
• section 5.2 LC 220 controller describing the controller as well
as the functions of the controller.
In section 6. Installation of lifting station and the following
sections, the above components are described as one unit.
5.1 Lifting station
The Grundfos Multilift MSS lifting stations are supplied complete
with single- or three-phase submersible pumps connected to the
LC 220 controller incorporating a level sensor.
Type key, lifting station
Example
Multilift lifting station
SS = one pump
Output power, P / 100 [W]
2
1 = single-phase motor
3 = three-phase motor
2 = 2-pole motor
4 = 4-pole motor
Nameplate, lifting station
Fig. 2 Nameplate, lifting station
Pos. Description
1 Type designation
2 Product number
3 Production code (year/week)
4 Frequency [Hz]
5 Number of phases + 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
3
12 Maximum flow rate [m
13 Minimum head [m]
14 Maximum head [m]
15 Maximum liquid temperature [°C]
16 Maximum ambient temperature [°C]
17 Weight [kg]
18 Blank
12
M SS .11 .3 .2
/h]
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, venting
pipe and a manually operated diaphragm pump, which is
available as an accessory.
Thus the collecting tank offers five horizontal inlets from the back
and the sides of the tank (4 x DN 100, 1 x DN 50) and two vertical
inlet connections at the top of the tank (1 x DN 100, 1 x DN 50).
The side and back inlets are 180 and 250 mm above the floor for
connection to direct 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:
Inlet level [mm]
Total tank volume [l]
Effective tank volume [l]
Setting to the relevant inlet level can be made via a DIP switch on
the control panel of the controller.
See section 7.4 Setting of LC 220.
The factory-set inlet level is 250 mm above the floor.
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 11.3 Performance curves. All parts in contact with the
pumped liquid are made of stainless steel. The pump has a
mechanical shaft seal.
See more technical data in section 11. Technical data.
Single-phase motors have run capacitors.
Single- and three-phase motors are protected by a thermal switch
in the windings and an additional thermal circuit breaker to cut out
the motor in case of overload.
Three-phase motors:
If the phase sequence is wrong, the controller indicates fault and
prevents the pump from starting. For correction of phase
sequence, see section 5.2.2 Control elements and indicator lights
and fig. 8.
If the motor is overloaded, it will stop
automatically.
Note
When it has cooled to normal operating
temperature, it will restart automatically.
180 250
44 44
20 28