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Installation instructions & user manual
9120-34378 v1.00 Sept 2020 - ZIP DEX Next / DEX12 Next
Technical support
Tel: 0345 6 005 005 email: [email protected] www.zipwater.co.uk
3. How to use
User
Each of the four user profiles can be provided with their own profile image . This image
appears in the main screen .
In the main screen, every user can set up and save his own desired temperatures for
the different applications .
Device Information
The current status and appliance data are listed here . Use the sensor keys to scroll
through the different information values .
• Plastic surfaces and fittings should only be wiped with a damp cloth . Do not use
abrasive or chlorine-based cleaning agents or solvents .
• For a good water supply, the outlet fittings (e .g . jet regulators and shower heads)
should be unscrewed and cleaned at regular intervals . Every three years, the electri-
cal and plumbing components should be inspected by an authorised professional in
order to ensure proper functioning and operational safety at all times .
Cleaning and maintenance
When operating with preheated water (e .g . with solar systems), you must ensure that
the inlet temperature does not exceed 70 °C .
If the inlet temperature exceeds the setpoint, the appliance is not providing any out-
put . The symbol is displayed in the main screen
Top-up heating
Set the exact temperature you need on the appliance and open the hot water tap .
Once you feel that the water is too hot, do not add any cold water and, instead, enter
a lower temperature on the appliance . If you were to add cold water, the water already
heated would cool down again and valuable energy would be wasted . Moreover, the
cold water added in the tap is not covered by the control range of the electronic cir-
cuitry, with the result that temperature constancy is no longer guaranteed .
How to save energy
This instantaneous water heater features an automatic air bubble protection to prevent
it from inadvertently running dry . Nevertheless, the appliance must be vented before
using it for the first time . Each time the appliance is emptied (e .g . after work on the
plumbing system, if there is a risk of frost or following repair work), the appliance must
be re-vented before it is used again .
1 . Disconnect the instantaneous water heater from the mains (e .g . via deactivating the
fuses) .
2 . Unscrew the jet regulator on the outlet fitting and open the cold water tap valve to
rinse out the water pipe and avoid contaminating the appliance or the jet regulator .
3 . 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 .
4 . Only then should you re-connect the power supply again (e .g . via activating the
fuses) to the instantaneous water heater and screw the jet regulator back in .
5 . The appliance activates the heater after approx . 10 seconds of continuous water
flow .
Venting after maintenance work
