Xylem MAXIBOX PLUS - Manual (Page 17)

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6.1 6.1 6.1 6.1 Installing the tank Installing the tank Installing the tank Installing the tank
The tank must be installed buried outside buildings.
Fix the tank so as to prevent it from rotating and floating.
Protect the tank from frost.
Do not walk on the cover.
Erect signs indicating the presence of the tank to avoid accidental damage.
6.1.1 6.1.1 6.1.1 6.1.1 Preparing the pit Preparing the pit Preparing the pit Preparing the pit
The pit must be 300 mm deeper than the planned installation. Allow suitable distance between the sides of the tank and the walls of
the pit. When installing in clayey, granulous or muddy ground, place a geotextile fabric around all the surfaces of the pit to prevent
the filling material from mixing with the soil (see section 12.1).
6.1.2 6.1.2 6.1.2 6.1.2 Filling the pit Filling the pit Filling the pit Filling the pit
When filling the pit, always make sure the tank is vertical.
The granulometry of the filling material must range from 2 to 36 mm. Fill the pit before the surface of the water table reaches the
level of the filling material. Consult section 12.2.
1. Place a 300 mm (A) thick layer of filling material at the bottom of the pit. Compact and level the surface. Install the tank.
2. Place a layer of filling material up to a minimum height of 700 mm (B). Place and compact the remaining filling material in
layers with a maximum thickness of 50 mm. The upper part of the pit (C) must not contain stones larger than 50 mm.
For difficult terrain (impervious, clayey) or in the presence of water tables, the bottom of the pit must comprise a 200 mm thick layer
of concrete. Also apply a concrete stabilisation layer around the tank. Consult section 12.1.
Height of tank [mm] Diameter of concrete base - Ø [metres] Approximate volume of concrete [m³]
1300 to 1650 1.8 metres 0.9
2000 to 2700 1.8 metres 1.4
6.2 6.2 6.2 6.2 Hydraulic connections Hydraulic connections Hydraulic connections Hydraulic connections
Hydraulic connections may only be performed by qualified staff in compliance with current regulations.
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 12.11.
All the pipes must be installed in such a way that they are not subject to stress. The pipes must not stress the
tank. Make sure the electric pumps are correctly installed on the descent line and that all the hydraulic
connections are tightened and watertight.
Where necessary, use suitable systems to prevent the transmission of vibrations and to protect the piping from icing up.
6.2.1 6.2.1 6.2.1 6.2.1 Connection to the inlet piping Connection to the inlet piping Connection to the inlet piping Connection to the inlet piping
Glue the template to the flat drilling area. Make a hole in the tank using a cup saw (hole Ø 167.5 mm). Install the Ø 160 mm gasket.
Smooth the 160 mm diameter external pipe. Insert the pipe in the gasket with the help of lubricant. Consult section 12.3.
6.2.2 6.2.2 6.2.2 6.2.2 Connection to the outlet piping Connection to the outlet piping Connection to the outlet piping Connection to the outlet piping
Connect the outlet piping of the tank to the piping connected to the sewage duct using the threaded/smooth PVC sleeve for gluing
(consult section 12.4). Fit a flexible union between the tank and the piping connected to the sewage duct to prevent breakages
caused by ground settlement. Fit a non-return valve on the piping connection to the public/private sewer. This will prevent
backwash. Always refer to current local and/or national regulations, laws and standards.
6.2.3 6.2.3 6.2.3 6.2.3 Connection to the vent piping Connection to the vent piping Connection to the vent piping Connection to the vent piping
Make a hole of the same size as the vent pipe in the upper part of one of the two flat surfaces. Connect the vent pipe to the tank
with a joint (not supplied). Consult section 12.5. The vent pipe and the electrical connections must use two separate ducts.
6.3 6.3 6.3 6.3 Hooks for electric pump lifting chains Hooks for electric pump lifting chains Hooks for electric pump lifting chains Hooks for electric pump lifting chains
The hooks are located on the stainless steel crosspiece. There are 2 small bent feet on the crosspiece what are used to hang the
pump chains (consult section 12.6).
6.4 6.4 6.4 6.4 Cable paths Cable paths Cable paths Cable paths
Install the grommets for the electric pumps in the upper part of the area used to make holes in the inlet piping. Pass the cables
through these grommets. Make sure the cables are long enough to allow further work to be performed on the electric pumps.
Separate the earth cable from the electric pump power cables.
Install the cable grommets in the flat area above the hooks for the float switches. Pass the cables through these grommets. Makes
sure the cable is long enough. Adjust the length of the cables and fix them to the hooks. Consult section 12.7.