Biasi RIVA COMPACT M90E.24S User Manual And Installation Instructions page 30

Installation
charge horizontally, it is not designed to enable
termination in the vertical plane.
Vertical kit with 90° elbow (Fig. 6.6B)
Co--- axial 60/100 mm
Supplied with a straight flanged adapter a co---
axial elbow and a co--- axial pipe with terminal, this
kit allows for a vertical rise of 0,3 m from the boiler.
In all circumstances the flue terminal must dis-
charge horizontally and the equivalent flue length
must not exceed 3 metres for models M90E.24S,
M90E.28S and 2,7 metres for the model
M90E.32S.
Elbows 45° & 90° (Fig. 6.6C)
Co--- axial 60/100mm.
Elbow kits enable the standard flue kits to be offset
to overcome obstructions or ensure the correct
clearances for the flue terminal. Each elbow used
in addition to the standard flanged elbow reduces
the overall acceptable length of the flue system as
follows:
45° reduce length by 0,5 m.
90° reduce length by 1 m.
ø 60/100
Fig. 6.6
Twin pipe kits ø 80 mm (Fig. 6.7)
Various twin (split) pipes kits and optional acces-
sories (elbows) are available to assist in the ter-
mination of the flue where the boiler is installed in
24
B
See section 6.9
A
ø 60/100
90° =--- 1 m
45° =--- 0,5 m
C
a location remote to an outside wall. These kits
allow for separation of the air supply pipe from the
pipe that discharges the exhaust gases. Conse-
quently it is possible to extend the flue system to
a greater distance than that provided by the stan-
dard horizontal co--- axial flue.
If either an additional 45° or 90° accessory elbow
is used then the maximum permissible length of
either pipe must be reduced by 0.90 m or 2,75 m
respectively.
Fig. 6.7
The graph in Fig. 6.8 demonstrates the allowable
equivalent lengths for the air supply and flue ex-
haust pipes of models M90E.24S and M90E.28S.
Flue exhaust "a"
32
30
28
26
24
22
20
18
16
14
12
10
Restrictor
8
47 mm
6
4
2
0
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32
Fig. 6.8 (all dimensions in metres)
90° =--- 2,75 m
45° =--- 0,90 m
M90E.24S
M90E.28S
Allowed values
No
Restrictor
Air intake "b"