Supplied By www.heating spares.co Tel. 0161 620 6677
3
The appliance is supplied complete with a standard telescopic flue
kit. This comprises a standard duct and a terminal duct and can
be used for flue lengths between 506mm and 820mm without
cutting the ducts.
The following additional concentric kits are available as optional extras.
Extension duct
(each extension extends the flue length by up to
767 mm)
90° Elbow
(Allows an additional bend in the flue and has an
‘equivalent length’ of 767 mm.) This elbow is mechanically
different from the flanged elbow supplied as standard with the
appliance, but has the same equivalent length of 767mm.
45° Elbow
(Allows an additional bend in the flue and has an
‘equivalent length’ of 384 mm.) This elbow is mechanically
different from the flanged elbow supplied as standard with the
appliance, but has the same equivalent length of 384mm.
2.5
AIR/FLUE DUCT SPECIFICATIONS
3
SPECIFICATION FOR STANDARD AND EXTENDED STRAIGHT FLUES
(Refer to section 2.5(b) for maximum allowable lengths)
•
•
•
‘L’
‘L’
Ws
Wr
3(a)
•
•
•
•
•
•
•
‘L’
‘L’
Ws
Wr
3(b)
•
•
•
•
Fig 3a - Standard flue assembly using
either side or rear outlet.
Flue length ‘L’ (measured from the boiler
outlet centre line to the outside wall face)
= max 820mm
Maximum wall thickness Wr
(Rear outlet) = 620mm max
Maximum wall thickness Ws
(either side outlet) = 590mm max.
(Allowing for minimum clearance of 5mm)
Fig 3b - Standard flue assembly with
optional straight extensions using either
side or rear outlet
Refer to the following table:
(Definitions of lengths ‘L’, Wr and Ws
are as given in the table below
NUMBER LENGTH
Wr
Ws
OF EXTENSION
L’’
(REAR)
(SIDE)
KITS
ONE
1587
1387
1357
TWO
2354
2154
2124
Socket
(for use with elevated horizontal flues and vertical cowls)
Vertical Cowl Kit.
(For use where an external wall is not available)
These optional kits may be used with the standard flue kit to
produce an extensive range of flue options. Examples are
illustrated in Figure 2. Variations upon these illustrations may be
used providing that the following rules are strictly obeyed.
a)
Please refer to the following diagrams to select your particular
flue application and work out your parts requirement.
b)
The maximum permissible allowable length of the flue system is:
3045mm (120in) Horizontal terminal
3633mm (143in) Vertical terminal
continued on page 5
