Norms and regulations
Noise protection
Antifreeze
11
Noise protection
The gas condensing boiler R40 is
equipped with a premix burner. The
noise level of this very quiet premix
burner is extremely low in comparison
to conventional gas burners. Therefore
no further measures have to be taken
for noise protection in the boiler room.
Antifreeze
The R40 can be used with the
antifree
ze type Shell Antifreeze
Concentrate.
The concentration of the
antifreeze in
the system affects the max
.
cap
city the boiler can work on. The relation
between antifreeze concentration and
capacity reduction of the boiler can be
found in the graph.
Noise created by system components
(
e
.
g
. pumps) should be taken care of
with external measures, in case of
hig
her noise level requirements.
0
10
20
30
40
50
10
15
20
25
30
35
40
45
50
55
Antifreeze [%]
C
apa
ci
ty
re
du
ct
ion
[%
]
