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A
ATH I
O
IRA
NSTALLATION
PERATION AND
Figure 30: Individual Flue Connection Detail
Figure 31: Flue Connection Dimensions
11.3 Outside Combustion Air Supply
Where necessary, clean air may be ducted into the burner
box through an added spigot on the back of the burner
box replacing the existing dust arrest baffle plate.
See Page 49, Section 11.1.3 for recommendations on duct
length. Air duct should be as straight as possible. Do not
use bends in excess of 45°. Consult the manufacturer if
more than 2 x 45° offset bends are necessary. The fresh
air duct must be self supporting.
50 of 73
S
M
ERVICE
ANUAL
End of Tube
Fan Tube
Fan Model
A
Torin DSF-133-42
79 mm 95 mm
Torin DSA-524-202 86 mm 102 mm 51 mm
McMillan N1398A
89 mm 102 mm 51 mm
C
Fan
B
C
45 mm
11.3.1 Air Supply Requirements
When fresh air duct is used, follow one of these rules:
The flue must penetrate the roof while fresh air can
penetrate any wall. (See Page 51, Figure 33)
The flue and fresh air supply must penetrate the
same roof, at a minimum of 1 m apart. (See Page 51,
Figure 33)
The flue must penetrate 1 m higher than the fresh air
inlet on the same wall. (See Page 51, Figure 33)
A
B
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