Grundfos LC 221 Series, Installation And Operating Instructions Manual

Page: 29 / 832

English (GB)
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4. Prepare the connection for diaphragm pump (optional).
Use cup drill,
∅
43, for DN 50 connection socket. To avoid
sharp cutting edges, the hole must be deburred.
Fig. 23 Cutting or drilling of optional connection holes
5. Connect the inlet pipe to the tank.
Install an isolating valve between inlet pipe and lifting station
to avoid inflow during maintenance and service.
We recommend an easy-to-handle PVC isolating valve.
Fig. 24 Installation of isolating valve
6. Connect the discharge pipe.
Install a flexible connection between the pre-assembled
discharge pipework and the discharge pipe. A flexible
connection can be ensured if a distance of approx. 1 cm is left
between the pipe ends of the connecting piece and the
discharge pipe.
7. Connect the venting pipe.
The DN 70 venting port on top of the tank is open.
Connect the venting pipe to the venting port via a flexible
connecting piece. The venting pipe must be led out above the
roof into the open air in accordance with local regulations.
Check the use of venting valves (accessory) according to
local regulations if venting above the roof is impossible.
A flexible connection can be ensured if a distance of approx.
3 cm is left between the venting pipe end and the venting port.
8. Connect the diaphragm pump (optional).
Fit the diaphragm pump on the discharge side. To facilitate
servicing of the diaphragm pump, we recommend fitting a
1 1/2" isolating valve to the tank port.
9. Fix the tank to the floor.
Fig. 25 Fixing point for fixation of tank to the floor
8. Installation of LC 221 controller
The installation must be carried out by authorised personnel in
accordance with local regulations.
8.1 Location
LC 221 can be installed at ambient temperatures ranging from
0 °C to +40 °C.
Enclosure class: IP56.
Install the controller as close as possible to the lifting station.
When installed outdoors, LC 221 must be placed in a protective
shed or enclosure. LC 221 must not be exposed to direct sunlight.
T
M
05
12
42
25
11
T
M
05
15
03
28
11
Caution
Make sure that weight from inlet, discharge and
vent pipes does not rest on the tank. Long pipe
sections, valves, etc. must be supported.
Warning
Never step on the lifting station.
DN 50 -
∅
43
DN 100 -
∅
100
DN 150 -
∅
150
TM
05
21
58
45
11
Warning
Before making any connections in LC 221 or
working on pump, pit, etc., make sure that the
power supply has been switched off and that it
cannot be accidentally switched on.
Warning
Do not install the LC 221 controller in explosion
hazard areas.