Figure 2a Clearance to Combustibles (U-Tube Variants).
The minimum clearances to combustible materials are given in the tables below. These
minimum distances MUST be adhered to at all times. Adequate clearance MUST be provided
around air openings into the combustion chamber and there MUST be suitable clearance for
accessibility and for combustion / ventilating air supplies.
B
B
Si
de
vent
ed
A
End view.
Be
low
he
ater
A
0° t
o
55°
Angled
view.
C2(*)
C1(*)
E
Burner en
d.
Above
R
eflecto
r
(unven
te
d)
Ab
ove
Burner
Service
distance
U Bend end.
NOTE
: Ensure that there
is adequate provision
in the bui
lding
fo
r co
mb
us
tion
and v
e
ntilati
on
air supply. Installation
must meet mi
nimum
requirements and
appliciable codes.
* u
nvented
D
B1
Ensure burner is
mount
ed on
bott
om
tu
be
when angle
mounting
Side unv
ent
ed
6
Ensure
tha
t there
is ad
eq
ua
te
provision in the b
uildin
g f
or
combustion and ventila
tion
a
ir
su
pp
ly.
Ins
tallati
on must meet minimum
requiremen
ts and applicia
ble
code
s.
WA
RNI
NG!
appli
cable