Zip InLine CEX-U Manual

1
Installation instructions & user manual
9120-25693 v3.00 Oct 2018 - ZIP CEX
Technical support
Tel: [phone] email: [email protected] www.zipwater.co.uk
Zip
InLine
Installation instructions & user manual
Model number:
CEX-O, CEX-U
Electronically controlled instantaneous water heaters.

2Installation instructions & user manual
9120-25693 v3.00 Oct 2018 - ZIP CEX
Technical support
Tel: [phone] email: [email protected] www.zipwater.co.uk
CONTENTS
• Please read these instructions carefully before commencing installation of the
instantaneous water heater.
• Please leave these instructions with the end user after installation.
• To ensure you have a copy of the latest instructions visit www.zipwater.co.uk.
SAFETY INSTRUCTIONS.........................................3
GENERAL PRODUCT DESCRIPTION ...............................6
APPROVALS ...................................................6
DIMENSIONS ..................................................6
SPARE PARTS .................................................7
TECHNICAL DATA ..............................................8
INSTALLATION .................................................9
Requirements .................................................9
Electrical connection ..........................................11
COMMISSIONING..............................................13
Selection of power rating .......................................13
SERVICE MENU ...............................................16
OPERATION ..................................................18
Temperature setting ...........................................18
Programme buttons ...........................................18
Temperature limitation .........................................18
Reset to factory setting.........................................19
How to save energy ...........................................19
ECO mode ..................................................19
Power limit ..................................................19
MAINTENANCE & CLEANING ....................................20
Purging after maintenance work..................................20
FAULT FINDING ...............................................21
END OF LIFE DISPOSAL ........................................22
WARRANTY ..................................................22

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Installation instructions & user manual
9120-25693 v3.00 Oct 2018 - ZIP CEX
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SAFETY INSTRUCTIONS
IMPORTANT:
PLEASE READ THESE INSTRUCTIONS CAREFULLY. NOTE THE SAFE OPERATIONAL
REQUIREMENTS, WARNINGS AND CAUTIONS. USE THIS PRODUCT CORRECTLY AND WITH
CARE FOR THE PURPOSE FOR WHICH IT IS INTENDED. FAILURE TO DO SO MAY CAUSE
DAMAGE AND/OR PERSONAL INJURY, AND WILL INVALIDATE THE WARRANTY. RETAIN THESE
INSTRUCTIONS FOR FUTURE USE.
WARNINGS
• Installation, commissioning and maintenance of this appliance
must only be carried out by a competent installer who will
then be responsible for adhering to all relevant standards and
regulations.
• If inlet temperature is up to 70 °C (eg. fed from a solar supply)
mixing with cold water will be required to ensure a safe
temperature at the outlet.
• Do not remove the front cover under any circumstances before
switching off the mains electrical supply to the unit.
• Never make technical modifications, either to the appliance
itself or the electrical leads and water pipes.
• The appliance must be earthed at all times.
• Pay attention to the fact that water temperatures in excess of
approx. 43 °C are perceived as hot, especially by children, and
may cause a feeling of burning. Please note that the fittings
and taps may be very hot when the appliance has been in use
for some time.
• The values stated on the rating plate must be observed.
• In case of malfunction, disconnect the mains power supply
immediately. In case of leaks, cut off the mains water supply
instantly. Repairs must only be carried out by the customer
service department or an authorised professional.
• This appliance can be used by children aged 3 years and
above and persons with reduced physical, sensory or mental
capabilities or lack of experience and knowledge if they have

4Installation instructions & user manual
9120-25693 v3.00 Oct 2018 - ZIP CEX
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SAFETY INSTRUCTIONS
To observe additionally for pressureless installation:
• The water outlet behind the devices must not be blocked, and
the water flow must not be restricted.
• The water outlet facilities, such as shower heads must be
decalcified regularly. Deposits must be removed at regular
intervals.
• Only the fittings recommended by the manufacturer may be
used.
• If the appliance is exclusively connected to a single shower,
only the shower heads recommended by the manufacturer may
be used. No other fittings or appliances which decrease the
water flow to the shower may be installed.
been given supervision or instruction concerning use of the
appliance in a safe way and understand the hazards involved.
Children shall not play with the appliance. Cleaning and
user maintenance shall not be performed by children without
supervision.
• If the appliance is factory equipped with a power supply cable,
it must be replaced with an original spare cable from the
manufacturer in case of damage by an authorised technician in
order to avoid any hazards.
• In accordance with EN 60335, the appliance must be
permanently connected to the supply through an isolating
switch with a contact separation of at least 3 mm in all poles
and be protected by a suitably rated RCD.
• The wall bracket must be secured with the supplied screws and
dowels. The appliance must be secured to the wall bracket.
The appliance may only be operated if it has been properly
mounted on the wall bracket.
• The required water resistance may not fall below the value
stated on the rating plate at any time.

5
Installation instructions & user manual
9120-25693 v3.00 Oct 2018 - ZIP CEX
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SAFETY INSTRUCTIONS
• The Zip InLine is intended for connection to mains supply only.
In any other case please contact Zip on 0345 6 005 005 for
advice.
• Zip Water UK cannot be held liable for any damages
caused by failure to observe these instructions.
!CAUTIONS
• Optimum operation is ensured at a water flow pressure of 0.2
to 0.4 MPa (2-4 bar). The appliance must not be subjected to
pressure exceeding 1.0 MPa (10 bar).
• The appliance must only be used when correctly installed and
in perfect working order.
• The appliance must be installed in a frost-free room and must
never be exposed to frost.
• The CEX-O and CEX-U range is not intended for use with
thermostatic mixing valves or taps. If thermostatic mixing
valves or taps are to be used, their compatibility with the
instantaneous water heater must be verified under site
operating conditions.
• The appliance must be completely filled with water before
being switched on.
• Before commissioning for the first time and each time the
appliance or the piping system is emptied (e.g. due to work
on the plumbing system or maintenance), the appliance must
be purged by opening and closing the hot water tap until all
air has been eliminated from the water heater and no more air
emerges, before re-connecting to the electrical supply.
• The appliance must only be used for heating wholesome (or
cat 1) water. The specific water resistance must not fall below
the required value indicated on the rating plate. The appliance
must not be used for any other purpose.
• Incoming water temperature must not exceed that stated in
Technical data.

6Installation instructions & user manual
9120-25693 v3.00 Oct 2018 - ZIP CEX
Technical support
Tel: [phone] email: [email protected] www.zipwater.co.uk
APPROVALS
Zip InLine CEX-O and CEX-U are VDE approved to the LVD and EMC directives and
are CE marked.
Zip InLine CEX-O and CEX-U have been examined, tested and found when correctly
fitted to comply with the requirements of the United Kingdom Water Regulations /
Byelaws (Scotland).
The products are listed under the WRAS (Water Regulations Advisory Scheme) Water
Fittings and Materials Directory.
DIMENSIONS
108
37
312
100
177
108
37
312
100
177
Dimensions in mm
GENERAL PRODUCT DESCRIPTION
The instantaneous water heater CEX-U / CEX-O is an electronically controlled,
pressure-resistant water heater for a decentralised hot water supply to one or more
outlets.
Its electronic control regulates the heating power consumption depending on the
selected outlet temperature, the respective inlet temperature and the flow rate, thus
reaching the set temperature exactly to the degree and keeping it constant in case of
pressure fluctuations. The required outlet temperature can be entered on a keypad and
can be read off the digital display.

7
Installation instructions & user manual
9120-25693 v3.00 Oct 2018 - ZIP CEX
Technical support
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SPARE PARTS
Heating element
with SDB IN82862
Temperature sensor
set IN82512
Connecting
terminal
IN86250
Flow sensor
IN82819
Inlet pipe
IN82802
Electronic PCB
IN82811
Non-return
valve IN82246
Grommet
IN82806
Hot & cold water connection
IN82813
Safety thermal
cut-out STB
IN82860
Control panel
IN82812 CEX-U
IN82816 CEX-O
Front cover
IN89589 CEX-U
IN89588 CEX-O
Filter
When ordering spare parts, please always specify the appliance model and serial
number.
Spares are available, however they may be on a made to order basis.

8Installation instructions & user manual
9120-25693 v3.00 Oct 2018 - ZIP CEX
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TECHNICAL DATA
Zip InLine
MODEL CEX-O CEX-U
Installation Over-basin Under-basin
Declared load profile XS
Energy efficiency class *)A
Energy efficiency (ηwh) *)40 %
Annual electricity consumption *)466 kWh
Rated power (Rated current) 6.0 / 9.6 kW (27.3 / 40 A)
Chosen power (Chosen current) 6.6 kW
(28.7A)
8.8 kW
(38.3A)
6.6 kW
(28.7A)
8.8 kW
(38.3A)
Electrical connection 1/N/PE 220..240 V AC
Min. required cable size 3 × 4 mm23 × 6 mm23 × 4mm23 × 6 mm2
Hot water (l/min) max. at ∆t = 33 K 3.8 5.0 3.8 5.0
Rated volume 0,3 l
Rated pressure 1.0 MPa (10 bar)
Connecting type pressure resistant / pressureless
Heating system Bare wire heating system IES®
Required spec. water resistance @ 15 °C
Spec. electrical conductivity
≥ 1100 Ωcm
≤ 90.9 mS/m
Inlet temperature ≤ 70 °C
Flow rate to switch on – max. flow rate 2,0 – 5,0 l/min 1)
Pressure loss 0.2 bar at 2.5 l/min 1.3 bar at 9.0 l/min 2)
Temperature choice 20 °C – 55 °C
Water connection G ½"
Weight (when filled w. water) 2.7 kg
VDE class of protection I
Water protection class IP25 IP24
Type of protection / safety
*) The declaration complies with the EU regulation No 812/2013
1) Flow rate limited to achieve optimum temperature rise
2) Without flow regulator
The cable size may not exceed 10 mm²
All data quoted at nominal supply voltage. Standard European voltage tolerances of -6 % to +10 % may be
applied.
A minimum water pressure of 0.2 MPa (2 bar) is recommended for optimum performance.
Maximum flow rate will be achieved at a water pressure of 0.6 MPa (6 bar).
The appliance must not be subject to more than 1.0 MPa (10 bar).
Temperature rise °C = (Nominal power rating (kW) x 14.3)
Flow per minute (litres)
Instantaneous performance calculations

9
Installation instructions & user manual
9120-25693 v3.00 Oct 2018 - ZIP CEX
Technical support
Tel: [phone] email: [email protected] www.zipwater.co.uk
INSTALLATION
• Appliance must only be installed in frost-free rooms. Never expose appliance to
frost.
• The CEX-O is designed for wall mounted installation and has to be installed with
water connectors downward. CEX-U for under-basin installation must be installed
with the water connections upward.
• The CEX-O complies with protection type IP25. The CEX-U complies with
protection type IP24.
• In order to avoid thermal losses, the distance between the instantaneous water
heater and the tapping point should be as small as possible (< 2m).
• For maintenance work, a shut-off valve should be installed in the supply line. The
appliance must be accessible for maintenance work.
• Hot and cold water connecting pipes should be WRAS approved and of copper or
steel construction. Plastic pipes may only be used if they conform to EN 16893,
Series 2. The hot water pipes must be thermally insulated.
• The specific resistance of the water must be at least 1100 Ωcm at 15 °C. The
specific resistance can be asked for with your water supply company.
• When considering the location of the heater, consideration should be given to the
safe and visible disposal of any water resulting from leaks and seepage. This is
particularly relevant when the heater is located in a cupboard or any concealed
location. For guidance please call Zip on 0345 6 005 005.
Installation site
Requirements
The following regulations must be observed:
• EN 806
• The installation must comply with current IEE regulations and relevant Local
Authority requirements
• The rating plate and technical specifications
• Only functional and appropriate tools must be used during the installation

10 Installation instructions & user manual
9120-25693 v3.00 Oct 2018 - ZIP CEX
Technical support
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INSTALLATION
• Attach the water connection pipes to the
appliance’s water connection. Use the
½ inch seals.
• Open and close the hot water tap until no
more air emerges from the pipe and all air
has been eliminated from the water heater.
Mounting the appliance
Installing the appliance
263 179
140
41
84
26
140 77
96
28
37
26
Fig. 1
Fig. 2
Fig. 3
• Thoroughly flush the water supply pipes
before installation to remove soiling.
• Hold the appliance on the wall, and mark
the drill lines at top and bottom, right and
left, corresponding to the small notches at
the edge of the appliance front cover (see
figure 1). The alignment template (located
on the pull-out pages in the middle of this
manual) may be used for this purpose.
• Connect the top and bottom marks
vertically with each other (A–A).
• Connect the right and left marks
horizontally with each other (B–B).
• The intersections of these lines are the
drill points (see figure 2).
• Drill the holes using a 6 mm drill. Insert
the included dowels and screws. The
screws have to protrude 5 mm.
• Hang up the appliance into the rear
hanging openings until it clicks into place
(see figure 3).

11
Installation instructions & user manual
9120-25693 v3.00 Oct 2018 - ZIP CEX
Technical support
Tel: [phone] email: [email protected] www.zipwater.co.uk
INSTALLATION
• The appliance must be installed via a
permanent connection.
• Heater must be earthed!
• A maximum cable size must be observed:
10 mm2.
• Take care to protect the wiring from damage
during installation and ensure that the wiring
is not directly accessible after installation.
• The appliance must be permanently
connected to the supply through an isolating
switch with a contact separation of at least
3 mm in all poles and be protected by a
suitably rated RCD.
Structural prerequisites
Electrical connection
1
2
5
3
4
Wiring diagram
Fig. 4
Only undertaken by a competent person
familiar with electric instantaneous water
heaters !
Please observe:
• The electrical installation must comply
with current IEE regulations and
relevant Local Authority requirements
• The rating plate and technical
specifications
• The appliance must be earthed!
1. Electronic circuitry
2. Heating element
3. Safety pressure cut-out
4. Terminal strip
5. Safety thermal cut-out

12 Installation instructions & user manual
9120-25693 v3.00 Oct 2018 - ZIP CEX
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INSTALLATION
Check that the power supply is
switched off prior to electrical
connection!
• Dismantle off the power cable in order to
insert the cable with its outer insulation
through the water splash protection sleeve
up to the cord grip into the appliance.
• Lead the cable through the water splash
protection sleeve into the appliance in order
to securely fix the outer insulation of the
cable with the cord grip. If necessary, use
one of the three predetermined breaking
points for the cable entry (at the right, left or
top). The protective sleeve prevents water
from entering the appliance alongside the
connection line. The protection sleeve must
be used!
• Mount the cord grip. The cord grip must be
used!
• Strip the cables and plug them in the
connecting terminals according to the wiring
diagram. The appliance must be earthed.
• Ensure that all connections are fully
tightened and secure.
• Following electrical connection, fit the front
cover. Make sure not to trap any cables
between the front cover and the body of the
appliance.
Fig. 5
Fig. 6

Installation instructions & user manual
9120-25693 v3.00 Oct 2018 - ZIP CEX
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Kabeleinführung / Cable entry
4,2 × 38mm
Ø6mm
600mm max
38
27
312 108
37
177 100
Anschlussraum
Connection zone
Cable entry

Installation instructions & user manual
9120-25693 v3.00 Oct 2018 - ZIP CEX
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Kabeleinführung / Cable entry
4,2 × 38mm
Ø6mm
600mm max
38
27
312 108
37
177 100
Anschlussraum Connection zone

13
Installation instructions & user manual
9120-25693 v3.00 Oct 2018 - ZIP CEX
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COMMISSIONING
®
Multiple Power System:
The rated capacity (max. power
consumption) is 8.8 kW / 230 V
and can be reduced to 6.6 kW.
MADE IN GERMANY
Fig. 7
Fig. 8
To prevent damage to the appliance,
the instantaneous water heater must be
purged of air before using it for the first time.
Before connecting the electrical supply, open
and close the hot water tap until the water runs
smoothly and no more air emerges.
To ensure a maximum flow, remove any
existing aerator from the tap. Flush the warm
and cold water pipes each at least for one
minute.
After every draining (e.g. after work on the
plumbing system or following repairs to the
appliance), the heater must be re-purged in this
way before starting it up again.
If the water heater does not function, the
temperature cut-out or the pressure cut-out may
have tripped during transport. If necessary, reset
the cut-out.
Selection of power rating
Only undertaken by a competent person
familiar with electric instantaneous water
heaters.
Upon first connection of the appliance to the supply
voltage, select the maximum power rating.
The maximum power rating of the appliance can
be selected as either 8.8 kW or 6.6kW at the time
of installation. The appliance will only commence
normal operation after selection of the power
rating. The maximum power rating should only be
selected with reference to the technical data table,
after ensuring that correct cable sizing and fuse
protection is in place and with regard to local site
conditions and IEE electrical regulations.
• Switch on the power supply to the appliance.
The digital display on the appliance must light
up.
• When switching on the power supply for the first
time, the value “88“ flashes in the display. If not,
please carefully read the Re installation section

14 Installation instructions & user manual
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COMMISSIONING
Reinstallation
Shower application
Fig. 9
of these instructions.
• Select the maximum allowable power rating depending on the local situation via the
up and down arrow keys: 8.8 kW (display “88”) or 6.6 kW (display: “66“) 230 V.
• Press key to confirm the setting. The appliance starts operating.
• Mark the set power rating on the rating plate.
• Open the hot water tap. Check the function of the appliance.
• After having set the maximum allowable power rating, the heating element will be
activated after approx. 10 - 30 seconds of water flow.
• Explain operation of the appliance to the end user and leave the operating
instructions for their reference.
• Complete the product registration card and return it to Zip or register the product on
line at www.zipwater.co.uk/product-registration.
The water heater’s temperature must be limited to
55 °C, if it is connected to a shower. The service
menu parameter “Temperature Limit“ (“tL”) must be
set to a value less or equal 55 °C (in consultation
with the customer) and the lock level must be
activated.
When the device is operated with preheated water,
it must be ensured that this temperature is limited to
55 °C as well.
• If the appliance is to be recommissioned
under different installation conditions it may be
necessary to alter the maximum power rating.
• This should only be done by a competent installer.
• To re-set the maximum power rating use a
screwdriver (compliant to EN 60900, current
issue) to short circuit the two pins as shown in
Fig. 9.
• This will reset all heater parameters to factory
settings.
• Value “88” will flash in the display panel until the
maximum power rating has been selected.

15
Installation instructions & user manual
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COMMISSIONING
Lock level
Fig. 10
The operating mode of the appliance can be restricted. The service menu can be used
to configure the appliance.
Activation of the lock level
• Set required lock level in the service menu (refer to chapter “Service menu” in this
installing instructions).
• Disconnect the appliance from the power supply.
• Move the jumper on the power electronics (PCB) from pin 2 to pin 1 (see figure 10).
• Reconnect the power supply to the appliance.
Deactivation of the lock level
• Disconnect the appliance from the power supply.
• Move jumper from pin 1 to pin 2 (see figure 10).
• Reconnect the power supply to the appliance.

16 Installation instructions & user manual
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SERVICE MENU
2
8
4
7
5
3
6
9
+
1
Open service menu
Display flashes
Press
≥ 2 sec
Menu item order of “Service menu”:
Flow
Power
Temp in
Temp out
Control value
Power limit
Diagnostics
Lock level
Software version
Radio channel
Received strength
Temperature limit
Signal
The service menu offers an overview of system
parameters and is used for diagnostics.
Press key and key simultaneously for at least
2 seconds to call up the service menu, the display
confirms by “FL” and by a flashing point. Use
the arrow keys and , to switch between the
individual menu items.
Press key to see the value of the currently
selected menu. The value flashes in the display.
(The value of some parameters can be adjusted
by using the arrow keys and .) Get back to
the drop-down-menu by pressing key again.
With key return to the standard display (nominal
value). After two minutes without any key stroke the
system automatically switches back to the standard
display.
Flow: Flow rate (l/min)
Power: Power consumption (kW)
Temp in: Inlet temperature (°C)
Temp out: Outlet temperature (°C)
Control value: Calibration value of the control system (40 - 60)
Power limit: Maximum power setting (kW)
Diagnostics: Last ten diagnostic messages (see below)
Lock level: Current lock level setting (see below)
Software version: Installed software version
Radio channel: Radio channel of heater and remote control
Received strength: Signal quality of remote control (10% - 100%)
Temperature Limit: Set maximum temperature limitation (°C)
Signal: Quality of radio contact with diagnostic display