- 22 -
INST
ALLA
TION
INSTALLATION
Figure 5.11
Flue gas exhaust duct lengths
Type
Maximum Extension
Exhaust-air (m)
Pipes
diameter
(mm)
MIN
MAX
Coaxial
sy
st
em
C13
0,6
6,0
Ø 60/100
C33
Twin-pipe
Sy
st
em
C13
S1 = S2
Ø 80/80
C33
0,6 = 0,6
6,0 = 6,0
S1 = Air intake - S2 = Flue gas exhaust
Figure 5.12
• Flue duct installation of forced exhaust and
air-supply type gas water heater (C13-33
type).
Figure 5.13
Type of air suction/flue gas exhaust ducting
Combustion air intake from outside
C13
Flue gas exhaust
and air suction
duct through
external wall in
the same range
of pressure
C33
Flue gas exhaust
and air suction
duct from
outside with roof
terminal in the
same range of
pressure
Cautions for flue installation
• Please use the flue supplied by our company.
Other flues with different specifications are
strictly prohibited. Do not change the speci-
fication of the flue.
• The installation of the flue must be correct,
otherwise the waste gases will flow back and
be dangerous (Figure 5.14).
Figure 5.14
Wrong
installation
Problem
caused
Correct
installation
Exhaust gas
leak into
room
Abnormal
combustion
Out
door
Common
flue
Work
abnormally
Out
door
