Nexus SOLO User manual

SOLO
POWER REGULATOR CONTROL FOR ELECTRIC DRYER
INSTALLATION, OPERATING AND USER MANUAL
THE WORK MUST ONLY BE CARRIED OUT BY QUALIFIED STAFF
Prior to installing and using the temperature controller, please carefully read this
manual and keep it for future reference

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TABLE OF CONTENTS
1General warnings ......................................................................................................................... 4
1.1 Disclaimer ............................................................................................................................ 4
1.2 Warranty............................................................................................................................... 4
1.3 Product compliance............................................................................................................ 4
1.4 General Warnings............................................................................................................... 4
1.5 Safety Warnings ...................................................................................................... 5
2Product presentation ............................................................................................................................... 6
3Symbols And Glossary............................................................................................................................ 6
4Technical Specification Tables.............................................................................................................. 8
5Installation – Qualified technicians only ............................................................................................... 9
5.1 Before you start................................................................................................................... 9
5.2 Towel Rail Warnings ............................................................................................ 10
5.3 Power supply Warnings ....................................................................................... 10
5.4 SOLO position................................................................................................................... 11
5.4.1 TOWEL RAIL POSITION.....................................................................................................................................11
5.4.2 SUPPLY CORD POSITION ................................................................................................................................12
5.4.3 SOLO REGULATING BOX POSITION .............................................................................................................12
5.5 SOLO installation.............................................................................................................. 13
5.6 Cleaning ............................................................................................................................. 15
5.7 Uninstalling SOLO............................................................................................................ 15
5.8 Notes for disposal of SOLO valid for the European Union ........................................ 15
6Use and functioning............................................................................................................................... 15
7Controller Functions .............................................................................................................................. 17
7.1 Basic Operating modes and statuses............................................................................ 17
7.2 Advanced operating modes ............................................................................................ 18
7.2.1 12h TIMER functioning ........................................................................................................................................18
7.2.2 24h TIMER functioning ........................................................................................................................................19
7.3 Settings and other functions ........................................................................................... 20
7.3.1 Power range setting..............................................................................................................................................20
7.3.2 Default timer duration in 12h-24h timer .............................................................................................................21
7.3.3 Lock screen ...........................................................................................................................................................22
7.3.4 Factory reset..........................................................................................................................................................22
8Maintenance ........................................................................................................................................... 23
9Diagnostics ............................................................................................................................................. 23

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10 Supplied accessories, consumables and spare parts...................................................................... 24
11 Power cable size reduction .................................................................................................................. 24

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1 GENERAL WARNINGS
1.1 Disclaimer
The manufacturer declines all responsibility for any inaccuracies in this document due to printing
or transcription errors. It reserves the right to make any alterations to its products deemed
necessary or useful. The manufacturer will not be held responsible for faults due to incorrect
installation.
1.2 Warranty
SOLO is guaranteed against defects in materials and/or workmanship for a period of twenty-four
(24) months from the date of purchase.
The guarantee will not be effective if the faults found are ascribable to the Buyer’s carelessness
and/or if the Products have not been used according to their technical specifications and in the
event of wrong maintenance by non-authorized engineers, cleaning with unsuitable procedures or
materials, improper storage, handling and transport, or any other circumstances that cannot be
ascribed to manufacturing defects for which manufacturer is responsible.
The guarantee of SOLO is not valid in case of improper use or wrong installation.
1.3 Product compliance
APPLICABLE EUROPEAN DIRECTIVES AND STANDARDS
Applicable Directives
2014/35/EU Low Voltage Directive (LVD)
2014/30/EU Electromagnetic Compatibility Directive (EMC)
2011/65/EU RoHS II Directive, Regulation REACH (EC 1907/2006)
2012/19/EU WEEE Directive
Electric dryer operation is in full compliance with EN 60335-2-43
1.4 General Warnings
•Read the instructions carefully before installing and using the electronic control (hereinafter
referred to as SOLO or appliance) and retain the instructions for future reference.
•Installation of SOLO must be performed only by qualified technicians which assume
complete responsibility for the definitive installation and consequent good functioning of the
product installed.
•Installation must be compliant with all applicable safety regulations and laws, national,
regional, provincial and town council Standards present in force in the Country in which the
final product has been installed, as well as the instructions contained in this manual. The
Manufacturer cannot be held responsible for the failure to comply with such precautions.

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1.5 Safety Warnings
• Children of less than 3 years must be kept away unless continuously supervised.
• This appliance can be used by children aged from 8 years or over and by persons with
reduced physical, sensory or mental capabilities or lack of experience and knowledge if
they have been given supervision or instruction concerning use of the appliance in a safe
way and they understand the hazards involved. Children shall not play with the appliance.
• Cleaning and user maintenance shall not be made by children without supervision.
• Children aged from 3 years and less than 8 years shall only switch on/off the appliance
provided that it has been placed or installed in its intended normal operating position and
they have been given supervision or instruction concerning use of the appliance in a safe
way and understand the hazards involved. Children aged from 3 years and less than 8
years shall not plug in, regulate and clean the appliance or perform user maintenance.
• CAUTION — Some parts of this appliance can become hot and may cause burns.
Precautions should be taken to ensure that prolonged contact with the el. dryer cannot
occur. Particular care should be taken in confined areas where accidental prolonged
contact with the el. dryer could be more likely to occur. Particular attention has to be given
where children and vulnerable people are present.
• WARNING: In order to avoid a hazard for very young children, this appliance must be
installed so that the lowest heated rail is at least 600 mm above the floor (see Figure 3).
• IMPORTANT: In order to disconnect the incoming supply for the purpose of isolation during
installation and maintenance it is recommended for the distributor’s service fuse to be
withdrawn or the circuit breaker at the distribution board to be switched off whilst work is in
progress.
• Do not install SOLO with an electric heating element not equipped with pre-set protection
devices designed to prevent over-heating of the el. dryer in abnormal conditions.
• Do not power SOLO on before it has been completely installed in a properly filled towel rail
with the electric heating element recommended by the manufacturer
• Check that the electricity supply system is connected through an MCB (Magnetothermic
Circuit Breaker) and a high sensitivity current differential and overcurrent relay of 30 mA
RCCB (Residual Current Circuit Breaker) connected directly to the socket or connection
box in use.
• If SOLO is not fitted with a supply cord with a plug, an omni-pole disconnection from the
supply is required, incorporated in the fixed wiring, in accordance with the wiring rules.
Switches intended to ensure all-pole disconnection must be directly connected with the
supply terminals and must have a contacts distance of at least 3 mm in each pole. The
switch intended to ensure all-pole disconnection must be dedicated exclusively to the
appliance.
• SOLO is suitable for use on an A.C.~ electrical supply. Before installation check that the
supply voltage corresponds with that marked on the electronic control.
• Do not insert metal objects or fingers or any other objects, even temporarily, into the
connection areas where SOLO is connected to the towel rail.

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• This appliance should only be used to dry fabrics washed in water using commonly
available detergents. Avoid direct contact of SOLO with any chemical product or alcohol,
including the liquid contained in the towel rail.
2 PRODUCT PRESENTATION
This product is an electrical / electronic component designed to be assembled, used and possibly
replaced in case of failure uniquely in the specific equipment for which it is intended.
SOLO is an electronic power regulator designed for regulating the thermal power of an electric
heating element installed in the el. dryer configured for drying towels washed in water.
Any other use is strictly forbidden. The type of regulation consists of an ON-OFF electronic open-
loop controller.
SOLO can be connected to a fully electric towel dryer or a hybrid electric-hot water heater (dual
fuel, central heating dryer).
3 SYMBOLS AND GLOSSARY
Figure 1: Components of SOLO regulating box (front and back view)

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Component
Description
Touchscreen interface
Capacitive touchscreen interface displaying current system status (in
black or white)
Grub screw seat
Position of the grub screw in order to fix SOLO to the Electric heating
element connection
Power supply cable
230 V power supply cable with plug
Figure 2: Electric heating element components
Electric Heating Element
Component
Description
Cartridge
Heating part of the electric heating element
Thread
Connection part to be fitted into the towel rail
Fixing part
Necessary part to tighten the electric heating element
into the towel rail with a 25 mm wrench
Gasket
O-ring gasket designed to be compressed between
the electric heating element connection and the upper
plastic part of the SOLO in order to prevent water
leakage
Electric heating element
connection – Nexus connector
part necessary for coupling with SOLO (and other
compatible controllers with Nexus Easy Connect)

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STANDARD PROVIDED KIT
Element
Description
O-Ring gasket
Grub screw
Allen key
22mm x 1mm gasket
designed to allow SOLO
coupling with the electric
heating element connection
part
A headless screw having a
socket for a hexagon Allen
key used to secure the plastic
housings of the SOLO onto
the electric heating element
connection, into the grub
screw seat (Figure 1)
4 TECHNICAL SPECIFICATION TABLES
SOLO and the electric heating element power must be carefully selected in proportion to
towel rail size and thermal output. To select SOLO and the heating element electrical
power, please refer to the el. dryer manufacturer instructions, when a certification related
to the complete system (according to EN 60335-2-43) issued by an European recognized
institute (like SEMKO, VDE, IMQ…) is available. The installer shall verify that SOLO
System operates in conformity with Table 2.
Electric heating element
Power (W)
200
400
600
800
1000
1200
Length (mm)
320
480
680
820
980
1150
Table 1
SOLO
Power supply
230 V / 50 Hz
Electric Heating element power
200 ÷ 1200 W
Insulation class
Class I
Colours and finishing
White or Chrome
Touch interface display
White or black
Dimensions
61.5 x 70 x 50 mm

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Water protection rating
IPX4
Maximum altitude above sea level
2000m
Operating ambient temperature
0°C ÷ 40°C
Storage temperature
-20°C ÷ 70°C
Max Humidity Level
RH 85% at 25°C (without
condensation)
Power regulation range
5 levels adjustable by settings based
on electric heating element power
capacity
Level 1: 20% of maximum power
Level 2: 40% of maximum power
Level 3: 60% of maximum power
Level 4: 80% of maximum power
Level 5: 100% of maximum power
Table 2
5 INSTALLATION –QUALIFIED TECHNICIANS ONLY
ALL ELECTRICAL INSTALLATION WORK MUST BE CARRIED
OUT BY A QUALIFIED ELECTRICIAN
Read the general warnings and safety warnings before installation.
IMPORTANT: Always disconnect the electricity supply from the mains during installation
and maintenance. It is recommended that the fuse is withdrawn, or circuit breaker
switched off at the distribution board while work is in progress (turning off the switch is not
sufficient).
During installation, de-installation and maintenance, ensure working place safety until the
operation is completed.
5.1 Before you start
•Avoid collisions during the handling. Do not deform SOLO.
•Avoid the contact of cables and of parts of the SOLO with sharping corners and do not
cause squashing.
•Do not subject the cables to traction. Do not apply concentrated pressures on the
SOLO surface.
•Any contact between plastic parts of SOLO and chemical products or alcohol (including
the water or the mixture water+ glycol inside the el. dryer) must be avoided.

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•Check the pack to ensure you have all of the parts listed at paragraph 3with no visible
signs of damage. Make sure that SOLO parts are completely dry and have no defects.
If any of the part is missing or appears damaged, you should return the device to the
point of purchase.
•When you are ready to start, make sure that you have the right tools at hand, plenty of
space and a clean dry area for assembly.
•Installation must be carried out in accordance with current standards and laws in force
in the country in which the system is installed.
•Before installation, never switch the SOLO on to verify functioning effectiveness.
•Don’t use the SOLO regulating box to lean the electrical towel rail on the floor as you
can damage the plastic housing and water can penetrate inside with a risk of electrical
shock.
5.2 Towel Rail Warnings
•The electrical dryer use is intended only for drying towels washed in water. Any other
use is forbidden.
•The heating element must be fitted in the towel rail before mounting the rail to the wall.
•The towel rail has to be mounted parallel to the wall using the brackets recommended
by the towel rail manufacturer. In order to avoid a hazard for younger children, the
electrical towel rail should be installed so that its bottom part is at least 600mm above
the floor according to EN 60335-2-43/A1.
•In Electric SOLO installation, fill the towel rail with certain percentage of water
according to the towel rail manufacturer instructions. In case of missing instructions, we
recommend to fill the towel rail with approximately 90% pure water and glycol mixture.
•In Electric SOLO installation the towel rail must have a sufficient air gap to allow for
water expansion.
•Making sure that the SOLO heating element is completely immersed in water.
•All metallic parts of the electrical dryer fitted with SOLO and powered must not exceed
the temperature limits according to the applicable standard also in case of SOLO
continuously powering the electric heating element.
For all other aspects, refer to EN 60335-1, EN 60335-2-43.
5.3 Power supply Warnings
•Do not connect SOLO to the power supply until the installation into a properly filled el.
dryer is completed.
•Make sure that the power lines are appropriate for the load required according to
technical specification tables (see part 4).

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•Class I SOLO (with yellow-green wire or earthed plug) must ONLY be connected to
sockets or connector blocks with earthed contacts according to national standards and
wiring regulations in force
•Protect the electricity supply with an RCCB (Residual Current Circuit Breaker) device.
•The electrical heating element must be connected to a suitable electricity supply by
way of the cable provided. This should be via a fused spur in accordance with the IEE
Wiring Regulations. If sited in the bathroom, the Fused Connection Unit must be
located out of reach of persons using the basin, shower or bath. If in doubt, consult a
qualified electrician.
SOLO supply cord
WITH plug
The socket and electricity supply must be appropriate for the required power. Do not
use extensions.
The socket must be compatible with the SOLO supply cord plug. Do not use adapters.
5.4 SOLO position
SOLO must be fitted into the towel rail BEFORE mounting the towel rail to the wall.
5.4.1 TOWEL RAIL POSITION
WARNING: In order to avoid a hazard for very young children, this appliance should be
installed so that the lowest heated rail is at least 600 mm above the floor (Figure 3).
•Do not install SOLO into a towel rail fitted in ZONE 0 or ZONE 1 (Zone definition IEC
60364-7-701 in Figure 3).
•The towel rail must be installed in a completely vertical wall.
•The el. dryer has to be mounted parallel to the wall using the brackets recommended
by the towel rail manufacturer.
•SOLO is protected against water ingress according to its IPX4 degree of protection.
The el. dryer where SOLO is fitted must be mounted inside the zone of the bathroom
according to its IP degree of protection and electrical legislation in force. In case of
doubt about the correct installation zone, refer to the relevant public institution.

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•SOLO must not be within reach of people using the basin, shower or bath.
Figure 3
5.4.2 SUPPLY CORD POSITION
The supply cord must be connected to a proper
socket or to a non-switched fused spur (without
an intermediate plug for SOLO supplied without
plug) which must be at least 25 cm from the
floor according to the wiring regulations in force
in the country where the installation is carried
out. Figure 4 shows examples of positioning of
the system.
Figure 4 SOLO positioning
5.4.3 SOLO REGULATING BOX POSITION
•SOLO must only be fitted vertically in the bottom part of the towel rail.
•Electrical dryer must NOT be installed with the SOLO regulating box located at the top.
This can seriously damage the control box and create a dangerous situation with a risk
of fire.
•SOLO must be installed at distance of 40 mm (minimum) and 80 mm (maximum) from
the wall. Figure 5 shows the optimal positions for the SOLO.

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Figure 5 SOLO positioning
5.5 SOLO installation
ATTENTION! Be careful when handling the regulator, especially when putting it on!
1. SOLO’S CONNECTION AND COUPLING
a. Insert SOLO into the electric heating element connection, applying slight pressure
until SOLO is fully inserted.
b. Keep SOLO pressed against the heating element in the towel rail and insert the
provided grub screw into its spot; make sure there is no room between the device
and the electric heating element fixing part (see part 3).

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2. GRUB SCREW INSERTION
a. Keeping SOLO pressed against the heating element in the towel rail, make sure the
grub screw is in its right positioning spot (grub screw seat) as shown in figure below.
b. Using the provided Allen key tighten the grub screw until it comes into contact and it is
fully inserted in its spot, so that the SOLO is securely fixed to the electric heating
element and the O-ring gasket is well in contact with both surfaces
c. Make sure the grub screw is NOT in other wrong positions by checking the alignment
with the back of SOLO, as shown in figure below.
3. TOWEL RAIL INSTALLATION
If the display is facing the wall after tightening the heater, always
adjust the heating element by turning it anti-clockwise with the
25mm spanner. The seal is designed to adjust to a certain amount
of releasing without starting to leak.
•Install properly the el. dryer with the SOLO into the wall
according to towel rail manufacturer instructions (See part 5.2).
4. CONNECTION TO THE MAINS
a. Connect the SOLO cable to the mains power according to current wiring regulations
in force in the country where the product is installed. Make sure that the power lines
are appropriate for the load required.
b. Check electric strength on the appliance after fitting SOLO to the towel rail
according to the instructions in Appendix A of EN60335-1: “Routine tests”.
c. In case of Class I controls, check earthing continuity on the appliance after fitting
SOLO to the towel rail according to the instructions in Appendix A of EN60335-1:
“Routine tests”.

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5.6 Cleaning
To clean SOLO, use only a dry and clean soft cloth.
Make small locally round movements.
Apply a light pressure especially to the chrome plastic surfaces to avoid potential
scratches.
Do not clean SOLO with aggressive products.
Do not wet SOLO in an attempt to clean it. Do not immerse in water.
When cleaning SOLO, it must be disconnected from the power supply.
5.7 Uninstalling SOLO
ALL ELECTRICAL WORK SHOULD BE CARRIED OUT BY A QUALIFIED ELECTRICIAN.
Do not touch the metallic parts of SOLO if it is powered; before maintenance and de-
installation operation wait the necessary time to ensure it is cold after it is switched off.
During installation, de-installation and maintenance, ensure working place safety until the
operation is completed.
5.8 Notes for disposal of SOLO valid for the European Union
The crossed-out wheeled-bin symbol on the el. dryer to which SOLO is installed,
reminds you that in the European Union all electrical and electronic products and
batteries must be taken to separate collection at the end of their working life. Do
not dispose of these products as unsorted municipal waste. Return the products to
collection to prevent possible harm to the environment or human health from
uncontrolled waste disposal and to promote the sustainable reuse of material resources.
Collection information is available from the product retailer, local waste authorities or
national producer responsibility organizations. For more information, see product country-
specific information.
6 USE AND FUNCTIONING
All uses different from the ones described in this section are to be intended as improper
usage. In case of doubts refer to the seller.
•The electrical dryer is intended only for drying towels washed in water. Any other
use is forbidden
•SOLO is intended to be used and installed into a towel rail. Any other use is strictly
forbidden and potentially dangerous.
•Do not switch on SOLO unless the heating element is properly immersed in the
liquid inside the el. dryers.

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•SOLO is intended to work only if the electric heating element - connected to SOLO
and fitted into the towel rail - is completely immersed in the liquid (water) inside the
el. dryer.
•SOLO is designed for use with water or water + glycol filled el. dryers.
•Do not use SOLO before it has been completely and correctly installed. If SOLO is
not firmly fixed to the el. dryer, disconnect the mains turning off the circuit breaker
switch and contact the manufacturer in order to avoid hazard.
•Do not cut the power supply cable to stop regulation or to switch SOLO OFF.
•Once connected to the heating element, SOLO regulating box MUST NOT be
disconnected from the heating element.
•Do not cover SOLO, even partially, even temporarily.

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7 CONTROLLER FUNCTIONS
7.1 Basic Operating modes and statuses

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7.2 Advanced operating modes
7.2.1 12h TIMER functioning
Configured power level (1-5) that repeats every 12 hours (for timer duration customization
see 7.3).
Use this mode if you wish to warm up your el. dryer at a configured power level
automatically every 12 hours as shown below. Activate this mode at the exact time you
wish to warm up your el. dryer at a configured power level (for 3 hours duration according
to factory settings).
In MANUAL mode or in ANTIFREEZE mode:
NOTE: after 10 seconds of no interaction, the device will go back to previous modality
without saving any operation.
1. press and hold until timer icons flash
2. tap to select the timer
3. tap until your desired power level
4. tap again to confirm.
At the end of timer countdown, icon will turn white to indicate that a 12h timer is scheduled.
To cancel 12h TIMER:
Press and hold for 5 seconds
CURRENT STATUS displayed (black display and white display)

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you can change the configured power level anytime while the icon is red (during
timer functioning) without loosing the starting time of the timer. The device will save the
last configured power level.
even during 12 h timer you can activate BOOST mode
7.2.2 24h TIMER functioning
Configured power level (1-5) that repeats every 24 hours (for timer duration customization
see 7.3).
Use this mode if you wish to warm up your el. dryer at a configured power level
automatically every 24 hours as shown below. Activate this mode at the exact time you
wish to warm up your el. dryer at a configured power level (for 3 hours duration according
to factory settings).
In MANUAL mode or in ANTIFREEZE mode:
NOTE: after 10 seconds of no interaction, the device will go back to previous modality
without saving any operation.
1. press and hold until timer icons flash
2. tap to select the timer
3. tap until your desired power level
4. tap again to confirm
At the end of timer countdown, icon will turn white to indicate that a 12h timer is scheduled.
To cancel 24h TIMER:
Press and hold for 5 seconds

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CURRENT STATUS Displayed (black display and white display)
you can change the configured power level anytime while the icon is red (during
timer functioning) without loosing the starting time of the timer. The device will save the
last configured power level.
even during 24 h timer you can activate BOOST mode
7.3 Settings and other functions
7.3.1 Power range setting
Choose your preferred working power range among 5 different sets: SOLO will work within
the power range you set (minimum power level is 20% in every set, maximum and
intermediate power variates according to the table below).
Power ranges
setting
default set 
20%
40%
60%
80%
100%
5 segments
4TH RANGE
16%
32%
48%
64%
80%
4 segments
3RD RANGE
14%
28%
42%
56&
70%
3 segments
2ND RANGE
10%
20%
30%
40%
50%
2 segments
1ST RANGE
8%
16
24%
32%
40%
1 segment
In ANTIFREEZE mode:
NOTE: after 10 seconds of no interaction, the device will go back to previous modality
without saving any operation