GL0052-03
– Envireau Mono-Tech Rainwater – Installation & Operation Guidelines
Page 8
NO-MAINS SYSTEM INSTALLATION
Please refer to the
NO-MAINS SYSTEM Guide Sheet (at end of this section)
throughout these
instructions. Dispose of the instructions for other systems. As you are installing a
NO-MAINS
system it is
assumed that you have
no
MAINS WATER SUPPLY available, or you do not wish to use MAINS water in
this scheme. In all cases, this equipment should be installed by competent, qualified personnel and should
comply fully with all the relevant regulations, particularly the current Water Regulations and the current
edition of the IEE regulations concerning the safe installation of such equipment. BE SAFE.
It is assumed that you have read and understood the tank Installation Instructions, the Tank is IN SITU but
not backfilled, and you must now consider the installation of the pipework and cable runs. Please be aware
that there are connections to the pump and depth sensor, located in the tank, which must exit via the turret. If
you intend using extension rings on the tank turret please bear this in mind. If there is any doubt regarding
the ability to carry out these connections due to such extensions, you may need to consider an access
chamber. Consult with a qualified civil engineer in this circumstance, particularly regarding the surface
loading.
Study the NO-MAINS Guide Sheet and decide on the following:
1) The route by which you will take the surface drain pipes back to the tank from the gullies and whether you
are fitting a rainwater filter or not.
2) The route of your tank overflow pipe If you are not using the overflow it MUST be blanked off with a good
seal. (NOTE. IF YOU ARE FITTING A “PUMPED OVERFLOW” you should refer to the document on NON-
STANDARD SYSTEMS before proceeding.)
3) The route and inverts for pipework from any manifold chamber collection points or Rain Water Filters.
4) The Location of the Control Panel. Note that this unit should be mounted under cover, protected from frost,
and be located at a convenient height of between 1.5 metres and 2.4 metres above GROUND level. If you
wish to mount the unit in any other location please contact ENVIREAU for further advice.
The following instructions, up to and including Item (9) involve essentially Civil and Plumbing work.
The ELECTRICAL INSTALLATION begins at Item (10)
Once you are confident in your choice of locations you should begin by laying in the pipework and electrical
ducts as shown on the Guide Sheet. The collection pipes should be a minimum of 110mm and should be
connected to the roof drainpipes via sealed gullies, which prevent the ingress of surface water.
WARNING. Surface water can contain many contaminants and the system will not function correctly
with contaminated water. Keep your installation clean, particularly the tank, to avoid blocked filters
and valves etc.
You may be forced by site conditions to install pipework in a different order to that suggested below, but for
the sake of clarity the instructions follow the Guide Sheet sequence. The first stage is to install the pump
plumbing pipework.
NOTE. You are strongly advised to leave the INSTALLATION of the pump itself until you are ready to
electrically
connect it in to the CONTROL PANEL. See step (13) following.
5)
Refer to the Guide Sheet DIAGRAM A.
The
pump outlet
source is the
tank connector
supplied with the
tank. Make certain that it is securely tightened in to the tank turret. Cut the MDPE 25mm (black) pipe
squarely and clean off rough edges. Use an insert in the end of the pipe if recommended by the supplier.
Make sure that the pipe and tank connector are clean and free from grit and soil etc. Do not insert the pipe if
the portion to be inserted is badly scratched or striated. With the collet loose on the tank connector, insert the
pipe fully home then tighten the collet. Once tightened, check the fitting nut, tank side, for tightness. (Do not
over tighten.)
6)
Refer to the Guide Sheet DIAGRAM A
. Lay in the
MDPE pump outlet pipe
according to your chosen route
and ensure that bending radii are kept as large as possible to avoid kinking. Before terminating the pipe in
the building, wash it through to void any grit or small stones. Fix and secure to a stop-cock or isolating valve
close to, or convenient for connection to, the Control Panel. The next stage is the fitting of the Electrical Duct.
7)
Refer to the Guide Sheet DIAGRAM A.
The
Electrical Duct
should be 40mm PVC and should be suitable
for the purpose. The duct should enter the tank turret through the pre-drilled hole. If this hole is not
