Xylem MIDIBOX SINGLEBOX PLUS DOUBLEBOX PLUS - Manual (Page 19)

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The Midibox / Singlebox Plus / Doublebox Plus series of lifting stations are fitted with several piping access points. Depending on the
type of installation and current local regulations, it may be necessary to fit a trap, check valve and/or tap on the pipe connecting the
system to the public/private sewer or on other pipes. Always refer to current local and/or national regulations, laws and standards. It
is always best to fit a check valve and an on/off valve upline and downline from the station. An installation example is shown in
section 11.6.
All the pipes must be installed in such a way that they are not subject to stress. The pipes must not stress the
station. Make sure the electric pump is firmly attached to the pipes and that all the hydraulic connections are
watertight.
Where necessary, use suitable systems to prevent the transmission of vibrations and to protect the piping from icing up.
6.1.1 6.1.1 6.1.1 6.1.1 Opening and preparing duct connections Opening and preparing duct connections Opening and preparing duct connections Opening and preparing duct connections
6.1.1.1 6.1.1.1 6.1.1.1 6.1.1.1 Midibox Midibox Midibox Midibox
Identify the connection for the duct you wish to open. Saw approximately 20 mm off the end of the duct and remove any burrs and
residue material.
6.1.1.2 6.1.1.2 6.1.1.2 6.1.1.2 Singlebox Plus / Doublebo Singlebox Plus / Doublebo Singlebox Plus / Doublebo Singlebox Plus / Doublebox Plus x Plus x Plus x Plus
Identify the connection for the duct you wish to open. Remove the bottom of the connection and remove any burrs. Fit the relative
gasket until the collar lies on the outer wall of the tank.
6.1.2 6.1.2 6.1.2 6.1.2 Connection to the inlet piping Connection to the inlet piping Connection to the inlet piping Connection to the inlet piping
On the station, identify the location of the inlet duct, marked with the symbol . Open the duct and connect the inlet pipe so that
it can drain on its own and so that incoming liquid does not affect operation of the float switches. Make sure the connection is
watertight.
Singlebox Plus / Doublebox Plus: there are several inlet ducts.
6.1.3 6.1.3 6.1.3 6.1.3 Connection to the outlet piping Connection to the outlet piping Connection to the outlet piping Connection to the outlet piping
The stations are supplied with the outlet piping already connected to the pump. The outlet is marked by the symbol .
Check that the unions are correctly tightened and airtight. Connect the outlet piping to the unions on the outer wall of the station.
Make sure the connection is watertight. Consult table 11.1 for information on the outlet pipe union. Attach the outlet pipe to the
connection with the public/private sewer. Make sure the outlet line is fitted with a check valve compliant with EN 12056-4.
6.1.4 6.1.4 6.1.4 6.1.4 Connection to the vent piping Connection to the vent piping Connection to the vent piping Connection to the vent piping
Remember to fit a vent pipe to prevent the build-up of flammable, explosive or toxic gases.
On the station, identify the location of the vent duct, marked with the symbol
. Open the duct and connect the vent pipe so that
it can evacuate any condensation in the station. Make sure the connection is watertight.
Depending on local regulations, different ratios between the outlet pipe and vent pipe diameters may apply.
Make sure the vent outlet is outdoors (for example, above the ridge of the roof if the station is installed inside a building) and that
the discharged gases cannot penetrate inside other buildings, rooms and the like.
6.1.5 6.1.5 6.1.5 6.1.5 Connection to the eme Connection to the eme Connection to the eme Connection to the emergency drain piping rgency drain piping rgency drain piping rgency drain piping
The bottom of the station is fitted with a connection for an emergency drain system, marked by the symbol . This connection can
be used to connect a secondary pump (for example, a manual diaphragm pump) whose drain outlet must be independent from that
of the electric pump inside the station. The manual pump is available as an optional kit.
Identify the location of the duct at the bottom of the station, open the duct and connect the emergency drain pipe. Make sure the
connection is watertight.
6.1.6 6.1.6 6.1.6 6.1.6 Non Non Non Non----return valve return valve return valve return valve
Fit a non-return valve in the piping connection to the public/private sewer. This will prevent backwash. If you choose a ball valve,
check whether it is of the “sinking ball (heavy)” or “floating ball (lightweight)” type, as the installation and operating conditions
change.
Install the valve at a distance of at least 1 metre from the lifting station to allow the liquid moved by the pump to open the valve
shutter (unless otherwise indicated by the manufacturer).
Always refer to current local and/or national regulations, laws and standards.
6.1.7 6.1.7 6.1.7 6.1.7 Check valve Check valve Check valve Check valve
Install a check valve in both the inlet and outlet pipes (connection to the public/private sewer). This will enable maintenance
operations to be carried out without having to drain the entire system. Either gate valves or ball valves can be used.
6.1.8 6.1.8 6.1.8 6.1.8 Mounting the pump Mounting the pump Mounting the pump Mounting the pump
The electric pump is supplied assembled in the station. Make sure it is not damaged. Before start-up, remove any packaging clamps.