Riello KV/200 20 ISC Solar Installation And Maintenance Manual page 29

C83
C53
B23P
C13 B53P
B23P Upstream fan. Comburent air intake
directly from the room where the
boiler is installed. Flue gas vent via
horizontal or vertical flues designed
to operate at positive pressure, with
air ventilation to room.
SEALED INSTALLATION (TYPE C)
Coaxial flues (Ø 60/100)
Coaxial flues can be oriented in whatever direction is
most convenient for the room, provided the maximum
lengths specified alongside are respected.
b
Ensure that the flue gas vent pipe has a 1% slope
towards the boiler.
b
Use of flue pipes longer than the maximum specified
alongside leads to a loss of heat output from the
boiler (see table alongside).
b
The boiler automatically adapts its ventilation system
to suit the type of installation and the length of the
flue. Never obstruct or partly choke the comburent
air intake pipe.
b
Use only flues specifically designed for use with
condensing boilers. Follow the instructions pro-
vided in the flue pipe kit to install the flues.
C63 C33 C43
C23 C13 C13
B53P Upstream fan. Comburent air intake directly from
the room where the boiler is installed. Flue gas
vent via horizontal or vertical flues designed to
operate at positive pressure, with air ventilation to
room.
C13 Concentric wall vent. Twin flue pipes can also be
used, but the wall through-pipes must be con-
centric or located close enough to be subjected
to similar wind conditions.
C23 Concentric vent to shared flue (air intake and flue
gas vent via same concentric pipe).
C33 Concentric roof vent. Outlets as for C13.
C43 Vent and air intake via shared twin pipes, subjected
to similar wind conditions.
C53 Separate wall or roof vent and air intake, in areas
of different pressure but never on opposite walls.
C63 Upstream fan. Comburent air intake and flue gas
vent without flue terminals.
C83 Upstream fan. Comburent air intake through wall
and flue gas vent to roof.
b
In Italy, refer to DPR 412 and UNI CIG 7129 stand-
ard.
Maximum straight length of
coaxial flue Ø 60/100
(m)
7,85
b
Maximum straight length is the maximum length of
the flue without bends, terminals or joints.
b
Values referred to atmospheric pressure at sea level.
Pressure drop (m)
45° bend 90° bend
0,5 0,85
29
INSTALLER