6720648592 (2014/05)
12 | Installation (must be carried out only by qualied technicians)
Fig. 11 Minimum clearances
Combustion gases
• All gas heaters must be connected in a leak-roof manner to
a gas evacuation pipe of adequate dimensions.
• The ue must:
– be vertical (reduced horizontal sections or no
horizontal sections at all)
– be thermally insulated
– have an exit above the maximum roof level.
• The combustion gases evacuation pipe must be inserted in
the ue ring. The external diameter of the pipe must be
slightly less than the diameter of the ue indicated in the
table of heater dimensions.
• The extremity of the evacuation pipe must be protected
against wind/rain.
If these conditions cannot be met, a dierent 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
ammable 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 specied requirements must also be respected.
5.3 Heater mounting
Remove the temperature/ow selector and the power
selector.
Unscrew the front xing screws.
With a simultaneous movement towards
you and upwards,
release the front of the two lugs from the back.
Fix the heater vertically, using the provided screw hooks
and plugs.
5.4 Water connection
It is advisable to purge the installation beforehand, because the
presence of dirt may reduce the ow and, in extreme cases,
cause a blockage.
Identify the cold water pipe (Fig. 12, item A) and the hot
water pipe (Fig. 12, item B), so as to avoid any possible
mis-connection.
DANGER:
Make sure that all ue connections are tighten
sealed.
Failure to follow this requirement may
cause dangerous exhaust gases to enter
living space which may result causing
personal injury or loss of life.
CAUTION:
Ensure that the extremity of the evacuation
pipe is placed between the ledge and the ring
of the ue.
h
3
3 3
40
L
L (m) h (cm)
0 - 1 3
1 - 2 6
2 - 3 9
3 - 4 24
6720607539-02.6Av
180
30
140
100
Heater Minimum useful area
WR11B 60 cm
2
WR14B 90 cm
2
WR18B 120 cm
2
Table 7 Useful areas for air intake
CAUTION:
Never support the gas heater on the water or
gas connections.
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