1611UDSBD-3GBEN, Pag. 11/36
Table 5 : maximum fl ue system pipe lengths
Diameter & maximum
fl ue pipe lengths
Flue pipe diameters and maximum pipe lengths in table 5 apply to both
horizontal
and
vertical
systems. Add
all
straight sections and equivalent lengths for elbow.
The total combined length
must not exceed
the maximum fl ue length.
• Use only one diameter of fl ue pipe on an installation.
• Minimum
fl ue is 1m.
Flue outlet
Venter outlet attachment requirements:
Depending on the size of fl ue pipe as determined in table 5, attach either the fl ue
pipe directly to the collar or a taper-type connector.
Attention :
Single wall fl ue pipe exposed to cold air or run through unheated areas should be
insulated. Where condensation is unavoidable, provision must be made for the
condensation to fl ow freely to a point to which it can be released, i.e. a drain or
gully. The condensation drain from the fl ue must be constructed from non-corrodible
material not less than 20 mm diameter. Copper or copper based alloys must not be
used for condensation drains.
The port must be at least 450 mm away from the air heater fl ue connection socket.
Follow the fl ue pipe manufacturers installation instructions for making joints, in-
cluding connections to the air heater, for passing through a building element and
for support requirements.
Single wall fl ue seamless aluminium or stainless steel pipes are required. All joints
must be sealed to prevent products of combustion from leaking into the building. If
the fl ue passes through a combustible element of the building it must be enclosed by
a sleeve of non-combustible material and separated from the sleeve by a minimum
of 25 mm air break. The temperature of any combustible material near to the fl ue
must not exceed 65°C when the heater is in operation. The fl ue must be at least
150 mm away from any combustible material.
Model UDSBD-3
015,020
025, 030
Heater socket & pipe dia mm
fl ue pipe
80
100
inlet pipe
80
100
Max. straight length (with wall/roof terminal) m
fl ue pipe
9
9
inlet pipe
9
9
Equivalent length of 45° elbow m
fl ue pipe
0.75
0.75
inlet pipe
0.75
0.75
Equivalent length of 90° elbow m
fl ue pipe
1.5
1.5
inlet pipe
1.5
1.5
