On the 300, the level is maintained with the exit
standpipe in the outlet (Fig.16). An overflow grill
is cut out of the central chamber wall for added
protection(Fig.17). In the 200, a weir plate (Fig.18)
sets the Nexus water level and the overflow is built
into the wall between the two chambers, with a
section moulded at a lower height (Fig.19).
NB. NON UK CUSTOMERS PLEASE NOTE: if you are
pump fed, you will receive the weir (200) and stand-
pipe (300) loose and they need to be inserted as
shown. The weir is simply dropped ito place. To
insert the pipe, the top two bolts and locknuts are
removed from the stainless steel outlet plate. Gently
pull the plate forward and firmly push the standpipe
in place. Replace the nuts and washer. IF THIS PIPE
IS NOT FITTED, THE WATER LEVEL IN THE BIOLOGICAL
CHAMBER WILL BE TOO LOW FOR THE FULL USE OF
THE BIO MEDIA AND THE EAZY !
The unit can be any height above the surface water
level, allowing adequate gravity return to the pond
( subject to the maximum performance of your cho-
sen pump) However, care needs to be taken that
the top of the Nexus is at least 500 mm higher than
the discharge point of the gravity return pipe into
the pond ( assuming that the gravity return pipe dis-
charges above the surface of the pond. If the grav-
ity return pipe discharges below the surface of the
pond. Please allow 50 mm from the exit of the Nexus
to the surface of the pond).
The length of this depends on the distance
between the air pump and the Nexus,
4. Ensure that the air pump is sited well above
water level to prevent water siphoning back
from the filter into the pump due to power cuts
or maintenance shut downs.
5. Pipe work from the unit’s waste valves to the
intended discharge point. This can be rigid
pipe work to a simple flexible hose.
6. A PVC reducer to connect your circulating
pump or pipe to the rubber connector sup
plied with your Nexus ( the size of which will
depend on your choice of pipe work to and
from the pond itself)
7. Care must be taken
when connecting
the waste valves (fig.
14 for the suggested
method) to your
chosen point of dis
charge valve.
Pump Fed Installation Section 200 + 300
Important: Essential First Action
In any pump fed installation, the first step is to make
sure that the water level weir plate/standpipe is in
place (Fig. 15 or Fig.16).
THIS MUST BE DONE BEFORE ANY ADDITIONAL INSTAL-
LATION WORK IS CARRIED OUT.
Figure 12 illustrates a typical pump fed installation.
When selecting the position of your Nexus Eazy filter,
carefully consider the following factors:
Nexus Eazy Rev. 1.04 page 5
Fig. 14
Chamber A
Max. Water level
adjustable standpipe
(pump fed)
Safety overflow
Exit plate
Chamber B
Chamber C
Chamber D
Chamber A
Max. Water level
Safety overflow
Exit plate
Chamber B
Chamber C
Chamber D
Fig. 15
Fig. 16 Fig. 17
Fig. 18
Fig. 19
Fig. 20 gravity version
(10 Seiten)
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