INSTALLATION
-3-
Nexus Setup
This section should be thoroughly read before proceeding with any installation.
Checks to do BEFORE Installation
Check the jubilee clips on the rubber boots are tightened to prevent leaks
Check that the collars on the waste valves are tight
(This is required as some loosening may have occured in transit)
Preparation
Important:
A solid and level base/ground is required. It should be a minimum of 1.2m x
1.0m, to allow easy access to valves and for maintenance purposes. The Nexus
filter needs to be equally supported, this is to prevent possible distortion when it
is full of water. The best option for this would be a level 100 mm thick concrete
plinth. Although decking, paving slabs or well packed gravel would be sufficient
as long as the Nexus sits level and is not allowed to deflect under the weight of
the water.
The Airpump should always be situated well above water level to prevent water
siphoning back into the pump should a power failure occur.
Installation Equipment required
Pond Pump, with a maximum actual (taking into account the head loss)
1.
flowrate no more than your Nexus model allows see Appendix A on page
12 for specs.
Air Pump to power the Kaldnes K1 Moving Bed, see Appendix A on page 12
2.
for specification of pump size.
Length of hose or braided pipe (10 mm inner diameter) to connect the air
3.
pump to the Nexus
A valve should be fitted before and after the Nexus so that the Nexus can be
4.
isolated if required. On Gravity Fed systems this should be a 4 inch (110mm)
ball valve located on the inlet side of the Nexus close to your filter house
wall.
A reducer to connect the 2 inch Nexus rubber boot to your pump.
5.
It is highly recommended that a suitably sized UV unit is installed with the
6.
Nexus for removal of single celled algae. UV systems are always installed
after the pump, so on Gravity fed Nexus the UV is after the Nexus and prior
to the Nexus on Pump fed installations.
It is also highly recommended that you fit an overflow pipe/drain to your
7.
pond.
The Nexus can be installed in either of two ways Gravity Fed or Pump Fed, the
Nexus is shipped complete to be set up in either format with all the necessary
components. The following sections explain how this is done.
