21
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
Before making the electrical connection, fill the mains and the appliance with water
by carefully opening and closing the hot water tap in order to vent completely.
To ensure a maximum flow, remove any existing aerator from the faucet. 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-vented in this way before starting it up again.
If the water heater cannot be put into operation, the temperature cut-out or the
pressure cut-out may have tripped during transport . Check that the power supply is
switched off and reset the cut-out, if necessary .
Selection of power rating
Only by authorised specialist, otherwise lapse of guarantee!
On delivery, the display shows the screen “APPROVED” (see left) . If not, the device
has already been powered once . In this case, please follow the section “Reinstallation” .
Upon first connection of the appliance to the supply voltage, select the maximum
power rating . Only after having set the power rating, the heater provides its standard
operation mode .
The maximum allowable power rating at installation site depends on the local situa-
tion . It is imperative to observe all data shown in the table “Technical specifications”,
in particular the required cable size and fuse protection for the electrical connection .
Moreover, the electrical installation must comply with the statutory regulations of the
respective country and those of the local electricity supply company (Germany: DIN
VDE 0100) .
1 . Switch on the power supply to the appliance .
2 . When switching on the supply voltage for the first time, the display shows the menu
to select the language . Choose your language, after that the selection of power rat-
ing appears .
3 . Select the maximum allowable power rating depending on the local situation via
sensor keys .
4 . Select “
OK
” to confirm the setting .
5 . Mark the set power rating on the rating plate .
6 . After having set the maximum allowable power rating, the heating element will be
activated after approx . 10 – 30 sec of continuous water flow .
7 . Open the hot water tap . Check the function of the appliance .
8 . Explain the user how the instantaneous water heater works and hand over the oper-
ating instructions .
9 . Complete the product registration card and return it to Zip or register the product
on line at www .zipwater .co .uk/product-registration .
7. Initial operation
SDB
STB
Multiple Power System MPS
®
:
The rated capacity of DEX Next (max .
power consumption) is 27 kW / 400 V and
can be changed internally to 24 kW, 21 kW
or 18 kW .
The rated capacity of DEX 12 Next is
11 .5 kW at 230 V and can be changed
internally to 8 .8 kW
