
15
Figure 12. Flue Attachment Induced Burners (VSUT or VSAUT)
A 127mm (5ins) Twin Wall Flue System
B Fan
Adaptor
7177-SUB (2501/2507 fan)
or 7176-SUB (2506 fan)
C Fan
2501/2507 or 2560
D Optional Ducted Air Intake. VSI-DA
E Standard Air Intake (supplied as standard)
Ventilation requirements are as detailed
in section 1.9
Ducted air must be used in locations
where there is airborne dust or where
there
is
a
polluted
atmosphere
e.g.
Chlorinated Vapours.
Maximum length = 9m
Minimum diameter = 100mm
Maximum no of bends = 2
Maximum flue length = 9.5m @ Ø125mm
Maximum no of bends = 2
All flues must terminate vertically.
For further information on flue runs, please refer
to BS 5440 pt.1 2000
For non-flued installations, delete items A and
B and rotate fan outlet to the HORIZONTAL
position away from the burner.
Products of Combustion
Products of combustion
Firing tube
Ducted Air Intake
D
E
A
B
C