2
SPECIFICATION FOR STANDARD AND SIDE HORIZONTAL FLUES
(Refer to section 2.6(b) for maximum allowable lengths)
3
•
•
•
3
SPECIFICATION FOR VERTICAL FLUES
•
•
•
•
•
X3
X1
measured from centre line of rear outlet
to edge of boiler casing = 180 mm
X2
measured from centre line of rear outlet
to edge of boiler casing = 220 mm
X3
= 100 - 330 mm
‘X3’ can be extended to 820mm for Hero
30 - 75, but only extended to 630mm for
the Hero 90 with rear flue outlet extension
kit 955081
Note:
For side horizontal flue application flue kit 955080 is required.
Note:
For vertical flue application flue kit 955082 and 988378 is required.
•
•
X1
X2
X1
= 365 - 820mm
X2
= 270 - 820mm
measured from the boiler outlet
centre line to the outside wall face
2(a)
2(b)
L
‘
L
’ measured from the top of
the boiler casing to the
underside of the air cowel.
Maximum allowable length of
‘
L
’ for:
Hero 32 - 75 = 4000mm
Hero 90 = 3200mm
Minimum allowable length of
‘
L
’ is 560mm
‘a‘ measured from the boiler outlet centre line
to the centre line of the extension elbow.
‘b‘ measured from the centre line of the
extension elbow to the underside of the air
cowl.
Maximum allowable flue length of ‘a‘ + ‘b‘ =
Hero 30 - 75 2460mm, Hero 90 1666mm
a
b
3(a)
3(b)
•
•
•
X2
•
X1
Hero 1/03 TO PRINT 8/5/03 10:45 am Page 3
