14
Installation instructions & user manual
9120-34373 v4.00 Nov 2018 - ZIP DBX DEX
Technical support
Tel: 0345 6 005 005 email: [email protected] www.zipwater.co.uk
COMMISSIONING
®
Fig. 11
Fig. 12
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 sys tem or
following repairs to the appli ance), 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.
Model DBX
Note: DBX 27 kW for connection only to 3/PE 400V AC supply.
• Switch on the power supply to the appliance.
• Open the hot water tap. Check the function of the appliance. The
heating element will be activated after approx. 10 - 30 seconds of
continuous 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 at www.zipwater.co.uk/product-registration.
Temperature Adjustment
• The factory set hot water outlet temperature is 50 °C.
• This factory setting can be modified within the range of approx.
30 °C to 60 °C by turning the potentio meter with a slotted
screwdriver as shown in Fig. 12 (width approx. 2 mm).
• The hot water outlet temperature will be decreased by clockwise
rotation and increased by counterclockwise rotation.
Note: The hot water temperature may not exceed 55 °C if the
appliance is connected to a shower.
Model DEX / DEX12
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
from 18, 21, 24 or 27kW (8.8 or 11.5 kW for DEX12) 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
DEX Multiple Power System:
The rated capacity (max. power
consumption) is 27 kW / 400 V and
can be changed internally to 24 kW,
21 kW or 18 kW.
DEX12 Multiple Power System:
The rated capacity (max. power
consumption) is 11.5 kW / 230 V and
can be changed internally to 8.8 kW
