Evolution Aqua Nexus Series Quick guide

INSTALLATION AND INSTRUCTION MANUAL
Evolution Aqua Ltd. - Evolution House - Kellet Close - Wigan - Lancashire - United Kingdom - WN5 0LP
t [phone] - f+44 (0) 1942 418 489 - e[email protected] - wwww.evolutionaqua.com
UK
English
NEXAUTO1131216MAN
IMPORTANT PLEASE READ:
We recommend that all electrical work on your Nexus Automatic
System be done by a suitably qualified electrician.
PRIOR TO INSTALLATION - MANUALLY CLEAN YOUR FILTER

WARNING: PLEASE READ THE FOLLOWING
SAFETY INFORMATION FIRST.
IMPORTANT SAFETY INFORMATION
- All electrical work should be carried out by a suitably qualified electrician.
- Always isolate the unit from mains electricity before carrying out any
maintenance.
- Always disconnect all pond appliances from the mains supply before
putting your hands into the water.
- Use in the area of the garden pond only if the installation complies with
the relevant wiring regulations.
- Power must be supplied through a Residual Current Device (RCD) with a
residual operating current not exceeding 30mA.
- This unit must be earthed when earth wire is fitted.
- The unit must not be submerged in water.
- Always hold a component part securely. Never hold any component parts
by their wires alone.
- Young children should always be supervised near water.
Disposal Of Your Old Product
Your product is designed and manufactured with high quality material
and components, which can be recycled and reused. When this crossed-
out wheeled bin symbol is attached to a product, it means the product
is covered by the European Directive 2002/96/EC. Please contact
your local authority about correct disposal for electrical and electronic
equipment. Our WEE Registration Number is WEE/FE1471RR.
Please act according to your local rules and do not dispose of your old
products with your normal household waste. The correct disposal of your
old product will help prevent potential negative consequences for the
environment and human health.

INTRODUCING THE NEXUS AUTOMATIC SYSTEM
Thank you for purchasing an Evolution Aqua Nexus Automatic System.
Continuing our long standing reputation for innovation, the Nexus Automatic System now enables Nexus
owners to benefit from a fully automated cleaning cycle on their multi award winning Nexus filtration
systems. Physically turning ball valves and manually switching pumps on and off will now be a thing of
the past thanks to the Nexus Automatic System. All of the key processes that form the cleaning cycle
are now controlled automatically with this easy to install kit.
Please read this instruction manual carefully from start to finish before attempting to install your
Nexus Automatic System.
CONTENTS
Parts list PAGE 04
Installation diagrams PAGE 06
Advice prior to installation PAGE 08
Installing the Inlet Valve Assembly PAGE 10
Fitting the control box PAGE 12
Fitting the Air Valve Control box PAGE 14
Connecting air lines PAGE 16
Installing the Automated Waste Valve PAGE 18
Operation PAGE 20
Cleaning principles PAGE 21
Installing non-return valves PAGE 22
Guidance for electrical connections PAGE 23
Cleaning with the Nexus Automatic System PAGE 24
The cycle timer explained PAGE 25
Setting the cycle timer PAGE 26
Commissioning PAGE 27
Troubleshooting PAGE 27
Warranty PAGE 29
3

NEXUS AUTOMATIC SYSTEM PARTS LIST
Your Nexus Automatic System comes complete with the following items:
1) Inlet valve assembly + seal (not fitted)
(Only supplied for GRAVITY FED installs,
not supplied with Pump Fed models)
2) Non-return valve
(Only supplied for PUMP FED installs,
not supplied with Gravity Fed models)
(GRAVITY FED MODELS ONLY) (PUMP FED MODELS ONLY)
EA CODE: K25-50-100
3) Automated waste valve 4) Control box
4

(Located inside the cardboard box divider)
500mm of
12mm air line
NEXUS AUTOMATIC SYSTEM PARTS LIST
Your Nexus Automatic System comes complete with the following items:
TOOLS NEEDED
You will need to use the following tools to aid installation of the Nexus Automatic System:
5) Air valve control box & fittings
(Including screws & O-Rings for lid)
7) Qty x 1 - 500mm air line extension
(For connecting to bio-chamber)
8) 1 metre of flexible cable conduit
3mm 5mm 3mm 3 Core
Mains Cable
Length according to installation
6mm
3mm 5mm 3mm 3 Core
Mains Cable
Length according to installation
6mm
3mm 5mm 3mm 3 Core
Mains Cable
Length according to installation
6mm
3mm
5mm 3mm 3 Core
Mains Cable
Length according to installation
6mm
3mm
5mm
3mm 3 Core
Mains Cable
Length according to installation
6mm
3mm 5mm 3mm 3 Core
Mains Cable
Length according to installation
6mm
3mm 5mm
3mm
3 Core
Mains Cable
Length according to installation
6mm
3mm 5mm 3mm
3 Core
Mains Cable
Length according to installation
6mm
A
B C
3mm 5mm 3mm 3 Core
Mains Cable
Length according to installation
6mm
D
3mm 5mm 3mm 3 Core
Mains Cable
Length according to installation
6mm
E
3mm 5mm 3mm 3 Core
Mains Cable
Length according to installation
6mm
F
3mm 5mm 3mm 3 Core
Mains Cable
Length according to installation
6mm
G H I
5
(Located inside the cardboard box divider)
6) Fixing kit
- Qty x 1 - Control box mount bracket - A
- Qty x 5 - Fixing screw inserts - B - (Qty x 2 if PUMP FED Model)
- Qty x 5 - Pan head hex socket screws - C - (Qty x 2 if PUMP FED Model)
- Qty x 2 - Pan head self tap box / mount screws (10mm) - D
- Qty x 4 - 25mm air box fixing screws - E
- Qty x 4 - O-Rings for 25mm air box fixing screws - F
- Qty x 4 - Cable ties - G
- Qty x 1 - 3mm allen key - H
- Qty x 1 - 5mm allen key - I

NEXUS GRAVITY FED AUTOMATIC SYSTEM INSTALLATION
Illustration below shows the recommended installation of a Nexus Automatic System on a
GRAVITY FED Nexus 300, 310 or 320 and Nexus 200, 210 or 220 manufactured after 2006:
Inlet valve assembly
Air valve
control box
To mains power
To
air
pump
To circulating pump
Control box
Control box mount bracket
Automated waste valve
Depending on your installation, it is advisable to fit a non-return valve
(not supplied) on your return pipework after the circulating pump. (See page 22)
We recommend that all electric work on your Nexus Automatic System
be done by a suitably qualified electrician.
500mm of
12mm air line
6

We recommend that the pond pump is raised off the bottom of the pond. This will
prevent the pond from emptying completely in the event of pump failure.
You MUST fit the supplied non-return valve on your inlet pipework after the
circulating pump and before the filter. (See page 22 for more details)
We recommend that all electric work on your Nexus Automatic System
be done by a suitably qualified electrician.
NEXUS PUMP FED AUTOMATIC SYSTEM INSTALLATION
Illustration below shows the recommended installation of a Nexus Automatic System on a
PUMP FED Nexus 300, 310 or 320 and Nexus 200, 210 or 220 manufactured after 2006:
NOTE:
Inlet valve
assembly
is not needed
Air valve
control box
To mains power
To
air
pump
To circulating pump
Control box
Control box mount bracket
Automated waste valve
500mm of
12mm air line
7

1. Carry out a normal cleaning cycle on your Nexus
If you have an existing Nexus filter system, currently in use, clean it as you would do normally as part of
your maintenance routine prior to installing the Nexus Automatic System.
2. Disconnect your circulating pump from
mains power supply
Once the Nexus Automatic is installed, the power supply to the circulating
pump will come from the Nexus Automatic Control box rather than being
supplied directly from the mains. Turn off and disconnect the pump from
the mains supply.
If the circulating pump is connected to a plug, this will need to be cut off to
allow for direct connection into the control box.
3. Disconnect part of the air line for the Eazy and Bio-Chamber
Currently, the incoming air lines connected to the Eazy and the Bio-Chamber in your Nexus are diverted via a
T-Piece connector and are controlled by Air Valves. You will need to disconnect this T-Piece and the airline up
to the valves. We recommend that you leave the Air Valves and Air Lines to the Eazy and Bio-Chamber in place,
simply disconnect the T-Piece and leave both Air Valves in the OPEN position at all times. Discard the T-Piece
and the 2 small air lines, but keep the air line that connects your pump to the Nexus. This piece is needed for re-
installing your air pump.
New air valve assemblies can be ordered from EA:
Keep this length of air line
EA CODE PART DESCRIPTION
1000-085 3/8” Mini Ball Air Valve (F/F)
1000-080 3/8” BSP Male Stud connector
PREPARING YOUR NEXUS PRIOR TO INSTALLING
THE NEXUS AUTOMATIC SYSTEM
FOR NEXUS FILTERS ALREADY IN USE:
OFF
Disconnect the
T-Piece and
airlines after the
air valves.
Leave the
air valves in an
OPEN position.
8

INSTALLING THE NEXUS AUTOMATIC SYSTEM
9
Some component parts are pre-wired together.
Do not hold any of the component parts by the wires alone.
It is advisable for two people to carry out the installation.

The inlet valve assembly is only needed on GRAVITY FED Nexus 200, 210, 220 and Nexus 300,
310 and 320 models manufactured after 2006.
1. The inlet valve assembly should be fitted with the
wires from the actuator facing the Nexus name panel
and the location of the control box. NOTE: The inlet
valve is supplied in the “OPEN” position. The foam
seal should not be fitted at this stage.
Wires should
face the
control box.
Wires should
face the
control box.
Wires should
face the
control box.
Nexus name
plate on this
side of Nexus.
View from
inside
the Eazy.
2. In preparation for drilling 3 pilot holes, fit the inlet
valve assembly into the correct location. If required,
use a sash clamp to squeeze the Nexus inlet together
to fit the inlet valve assembly. It may be necessary to
drain part of the Nexus to enable easier fitting.
NOTE: The foam seal should not be fitted to the
valve at this stage.
3. With the assembly in position, use the 3 holes in
the top of the inlet plate assembly as a guide, and
drill 6mm holes through each hole through the body
of the Nexus.
4. Now the 3 holes have been drilled, remove the
inlet slide plate assembly. Use a knife or blade to
remove any burr or excess plastic from around the
holes you have drilled.
FITTING THE NEXUS INLET VALVE ASSEMBLY (GRAVITY FED)
10
View from
inside
the Eazy.
View from
inside
the Eazy.
Nexus name
plate on this
side of Nexus.
Nexus name
plate on this
side of Nexus.

Wires should
face the
control box.
Wires should
face the
control box.
5. Using the 5mm allen key, screw the 3 fixing
inserts into the holes you have drilled in the
body of the Nexus. Tighten inserts until flush
with the surface.
7. With the foam seal fitted, re-fit the inlet slide plate
assembly, again using a sash clamp if needed.
8. Using the 3mm allen key, screw the 3 hex socket
screws into the fixing inserts and tighten up.
6. Ensure all edges of the inlet valve assembly are
completely dry. Peel off the backing tape from the
foam seal, then proceed to fit the foam seal around
edge of the outer blade on inlet valve assembly.
The seal must be centrally aligned. Trim off any
excess length.
Seal
Edge
11
View from
inside
the Eazy.
View from
inside
the Eazy.
Nexus name
plate on this
side of Nexus.
Nexus name
plate on this
side of Nexus.
View from
inside
the Eazy.
Nexus name
plate on this
side of Nexus.

BA
1. The Nexus Automatic Control Box should be
positioned in between the inlet and outlet of the
Nexus in either position A or B as shown. We
recommend installing it in position A.
NOTE: Take care not to pull on any connector wires
during installation.
4. Move the control box away and then drill 2 holes
into the positions you have marked using a 6mm drill.
You may need to use a knife to remove any excess
plastic or burr from around the holes you have drilled.
2. Use 2 x 10mm self tapping screws to fit the
stainless steel mounting bracket onto the back
of the control box to allow the control box to be
mounted to the Nexus. (These are the 2 inner
holes on the stainless steel bracket that align
with the box mounts).
BA
3. Hold the Nexus Automatic control box in the
position you want it located on the Nexus. Now use a
marker pen to make 2 marks where the screw holes
are on the stainless steel bracket.
FITTING THE CONTROL BOX ONTO THE NEXUS
We suggest that you familiarise yourself with the inside of the control box prior to installation.
See pages 23 to 27 for more information.
12
Inlet valve
only installed
on Gravity Fed
set-ups.

5. Screw 2 fixing inserts into the holes you have
just drilled using the 5mm allen key. Tighten
inserts until flush with the surface.
6. Fix the control box onto the Nexus using the pan
head hex socket screws and the 3mm allen key.
13

1. You are now going to install the air valve control
box onto the inlet cover on your Nexus. Position this
box so the “Power” and “Air To Bio-Chamber” outlets
face the main control box, as shown.
500mm
Air line
2. Remove the lid off the Air Valve Control Box by
unscrewing the 4 screws in each corner of the box
to allow access to fixing locations. NOTE: Keep the
4 screws and O-Rings safe for re-fitting later.
3. Place the Air Valve Control Box as shown.
Make sure the air line to the Eazy sits between the
Actuator and the stainless steel plate on the inlet
valve assembly.
4. To fit the Air Valve Control Box in this position,
drill 4 pilot holes using the 3mm drill bit through the
4 plastic panels in the base of the box.
INSTALLING THE AIR VALVE CONTROL BOX
14
Inlet valve
only installed
on Gravity Fed
set-ups.

5. When all 4 pilot holes have been drilled, use the
25mm screws and O-Rings, provided, to screw the
box onto the Nexus. Use a pozi drive screwdriver to
tighten the 4 screws up.
500mm
Air line
6. Use the 4 screws and O-Rings you removed in
Step 2 to tighten up the lid on the Air Valve Control
box.
7. The Air Valve Control Box is fitted into position
ready for air line installations.
15

CONNECTING THE AIR LINE TO THE EAZY
AND BIO-CHAMBER ON THE NEXUS
1. CONNECTING PRE-FITTED AIR LINE TO THE EAZY
The piece of airline pre-connected to the Air Control Valve port labelled “Air to Eazy” needs to
be inserted into the Air Valve on the centre chamber wall of the Nexus. This then connects to
the air line that wraps around the Eazy and connect up to the 90°elbow located at the bottom
of the Eazy in the centre chamber. Please ensure this airline is fed between the actuator and
the stainless steel cover on the Inlet Valve Assembly.
2. CONNECTING AIR LINE TO THE BIO-CHAMBER
The piece of air line supplied in the box (Item 7) should be connected to the Air Control Valve
port labelled “Air to Bio-Chamber”. This needs to be fed through the hole in the Nexus inlet and
connected up to the Air Valve fitted to the outer chamber wall of the Nexus.
3. CONNECTING AIR LINE TO THE AIR PUMP
Take the existing length of air line you removed earlier (see page 8) that was connected between
the T-Piece valve on your Nexus and your Air Pump. Now connect this air line into Air Control
Valve box in the port labelled “Air Pump”. (You do not need the old T-Piece and small lengths of
air line you removed earlier on page 8.
16

CONNECTING THE AIR LINE TO THE EAZY AND
BIO-CHAMBER ON THE NEXUS
AIRLINE TO EAZY
(Factory fitted)
(Supplied in box)
(Not supplied)
AIRLINE TO
BIO-CHAMBER
AIRLINE
TO THE
AIR PUMP
**IMPORTANT:
The air pump MUST be positioned above the water level on both GRAVITY-FED and
PUMP-FED installations. This is to avoid any possibility of back siphoning.
17

100mm
1. You are now going to install the automated waste
valve on the waste return pipework from your Nexus.
You can position this anywhere that is convenient on
the waste pipe run within reach of the power cable.
2. Before installation, ensure the waste valve on the
Nexus is in a closed position.
Mark 1 Mark 2
INSTALLING THE AUTOMATED WASTE VALVE
ONTO THE WASTE PIPEWORK
3. Taking the Automated Waste Valve, unscrew both
union ends off the automated waste valve.
4. Use a pencil or pen to mark the waste pipework
in line with one end of the ball valve minus the end
cap. Then measure 100mm along the pipe and make
a second mark.
18
Inlet valve
only installed
on Gravity Fed
set-ups.

INSTALLING THE AUTOMATED WASTE VALVE
ONTO THE WASTE PIPEWORK
5. From the lines you have marked, cut through the
pipework using a saw. Clean and dry the remaining
pipe thoroughly.
7. Using the automated waste valve as a guide, fit
the valve into the glued union end, but do not glue
the other union end.
9. Remove the automated waste valve from the pipe.
11. Now fit the automated waste valve back in
between the union ends and tighten both ends up.
MARK
100mm
MARK
6. Clean and dry the pipe thoroughly. Ensure the
union nut is over pipe prior to gluing the insert
flange. Apply solvent weld glue to one of the cut
ends of the pipe and fit the flange onto the pipe.
TIP: We recommend a “wet and dry” PVC glue be
used for gluing the flanges.
8. Mark the unglued flange position on the pipe
with a pencil or marker pen.
10. Ensure the union nut is over pipe prior to gluing
the insert flange. Then, using the mark you made in
Step 8 as the guide, glue the flange onto pipe so it
is located at this mark.
19

The Nexus Automatic System will control the cleaning cycle fully automatically. During the cleaning cycle, water is
flushed to waste, this will mean that unless the water in your pond is topped up, the water level will go down. We
recommend that an automatic top up system be added to your installation to allow for this.
Cleaning is done on a timer, which is factory set at every 3 days, however, this is easily adjustable to fit in with your
pond requirements. (See “SETTING THE TIMER”)
The Nexus Automatic System will run a cleaning cycle which lasts approximately 10 minutes.
OPERATION
■Adjustable timer kicks in to start a cleaning cycle.
■Control box automatically switches circulating pump off.
■The water level in the Nexus equalises (this will take around 2 minutes)
■Inlet valve closes whilst at the same time air is diverted from
the outer bio-chamber to the Eazy to clean the media.
■After the media inside the Eazy has been cleaned, the automated waste valve opens.
■Eazy is drained to waste and inlet valve opens for a
final flush of the Eazy.
■The automated waste valve closes.
■Air is diverted back from the Eazy to the bio-chamber.
■Circulating pump is switched back on.
■Nexus returns to filtration mode.
■Adjustable timer kicks in to start a cleaning cycle.
■Control box automatically switches circulating pump off.
■The water level in the Nexus equalises (this will take around 2 minutes)
■Air is diverted from the outer bio-chamber to the Eazy to clean the media.
■After the media inside the Eazy has been cleaned, the automated waste valve opens.
■Eazy is drained to waste.
■The automated waste valve closes.
■Air is diverted back from the Eazy to the bio-chamber.
■Circulating pump is switched back on.
■Nexus returns to filtration mode.
0
2.5
5
7.5
10
0
2.5
5
7.5
10
Nexus Automatic Gravity Fed cleaning cycle:
Nexus Automatic Pump Fed cleaning cycle:
APPROX. CLEANING TIMES (Mins)APPROX. CLEANING TIMES (Mins)
20