WRDB - GB
10
Installation
If these conditions cannot be met, a different location
must be selected for the gas intake and evacuation.
Surface temperature
The maximum surface temperature of the heater is less
than 85 °C, with the exception of the combustion gases
evacuation device. No special protection measures are
required for flammable construction materials or built-in
furniture items.
Air intake
The place where the heater is to be installed must have
an area of air supply according to the table.
The minimum requirements are listed above; however,
each country's specified requirements must also be
respected.
3.3
Heater mounting
B
Remove the temperature/flow selector and the
power selector.
B
Unscrew the front fixing screws.
B
With a simultaneous movement towards you and
upwards, release the front of the two lugs from the
back.
B
Fix the heater vertically, using the provided screw
hooks and plugs.
3.4
Water connection
It is advisable to purge the installation beforehand,
because the presence of dirt may reduce the flow and,
in extreme cases, cause a blockage.
B
Identify the cold water pipe (Fig. 5, item A) and the
hot water pipe (Fig. 5, item B), so as to avoid any
possible mis-connection.
B
Connect the water pipes to the water automatic
using the provided connection accessories.
Fig. 5
Water connection
3.5
Gas connection
Any local by-laws and regulations pertaining to
installation and use of gas-heated appliances must be
observed.
Please refer to the laws that should be attended in your
country.
3.6
Startup
B
Open the water and gas flow valves and check that
all connections are leak-tight.
B
Insert the two batteries correctly (Fig. 8) 1.5 V type R
supplied with the heater.
B
Check the combustion gases monitoring device is
functioning correctly, proceed as explained in “ 6.4
Combustion gas probe”.
Heater
Minimum useful area
WRD11B
≥
60 cm
2
WRD14B
≥
90 cm
2
WRD18B
≥
120 cm
2
Tab. 5 Useful areas for air intake
Caution:
Never support the gas heater
on the water or gas connections.
i
It is advisable to install a non-return valve
on the supply side of the heater to avoid
problems caused by sudden changes in
supply pressure.
