Supplied By www.heating spares.co Tel. 0161 620 6677
19
Tempra 12 / 18
4
5
6
2
3
Air
Flue
gases
110
160
Ø100
Ø60
Ref.
1
2
3
4
5
6
N
°
Pieces
1
1
1
1
33
1
Bend Ø80 air pipe
Horizontal Ø80 air pipe
Wind-protection terminal
T adaptor
Vertical Ø80 flue
Stack + connecting pipe
Description
Equivalente
pressure drop
1,5 m
1,0 m
2,0 m
included
33,0 m
4,0 m
41,5 m
Total
Table 6
fig. 12
fig. 13
Connection using two pipe system
The appliance may be connected to a system
of separate air/flue gas pipes with wall or
roof outlet, as shown in drawings 14-15 to the
side. Numerous accessories are available upon
request for the various different installation
requirements. The most frequently-used
components are shown in Tables 7 - 8 - 9 -10.
Please refer to the flue accessories catalogue
or the price list for other components.
To check that the maximum allowed length of
the pipes is not exceeded, a simple calculation
must be performed before installation:
1. For each component, Tables 7 - 8 - 9 list a
pressure drop in “equivalent air-metres”,
depending on the position of installation of
the component itself (air intake or flue gas
outlet, vertical or horizontal).
This drop is called “equivalent air-metres”
as it relates to the pressure drop of one
metre of air intake pipe (defined as being
equal to 1). For example, a 90° bend in a
Ø80 flue gas outlet has a pressure drop
equivalent to 2.5 air-metres, that is, equal to
2.5 linear metres of air intake pipe.
2. Once having completely defined the layout
of the double flue system, add the pressure
drops in equivalent-metres, according to the
position of installation of all the components
and accessories in the system.
3. Check that the total pressure drop calculated
is less than or equal to
45 equivalent
metres
, that is, the maximum allowable for
this model of boiler.
If the flue system chosen exceeds
maximum allowable limit, some sec-
tions of the pipes should be larger in
diameter.
