Fumes Exhaustion And Air Suction; Exhaustion Configurations; Installation “Sealed” (Type C); Concentric Ducts - Riello Residence Condens 25 KIS e Installer And User Manual

DHW system emptying (KIS only)
The hot water system must be emptied every time there is risk of
freezing by:
- Turning off the tap at the mains.
- Turning on all the hot and cold taps.
� Emptying out the lowest parts of the system.

10 - FUMES EXHAUSTION AND AIR SUCTION

The boilers must have appropriate ducts for fumes outlet and air
intake, according to the type of installation. Ducts are an integrant
part of the boiler but are supplied in separate kits, for improved
installation flexibility.
"Forced open" installation (Type B23P/B53P)
Fumes outlet duct Ø 80 mm (fig. 33A)
The fumes outlet duct can be aimed in the most suitable direction
for installation needs.
To install follow the instructions supplied with the kit.
In this configuration, the boiler is connected to the Ø 80 mm fumes
outlet duct by means of a Ø 60�80 mm adaptor.
In this case, the combustion supporting air is taken from the
room in which the boiler is installed, which must be a suitable
and ventilated technical room.
�on�insulated fumes outlet ducts are potential sources of
danger.
The fumes outlet duct must be inclined 1% towards the boiler.
The boiler automatically adapts ventilation according to the
type of installation and the length of the duct.
Max length fumes
outlet duct Ø 80 mm
25 KIS 60
35 KIS 40
20 IS 80

Exhaustion configurations

�efer to regulations in force for exhaustion of combustion products.
Products of combustion are evacuated by a centrifuge fan located
inside the air distribution box which is constantly monitored by the
control board.
�oiler is provided for without fume exhaustion/air suction kit, since
forced draught sealed chamber accessories can be used, as they
better adapt to installation characteristics.
For fume extraction and burning air restoration in boiler, use ori-
ginal pipes or other EC�certified pipes with equivalent characteri-
stics� check connection is correct as shown on instructions fume
accessories provided for with. More appliances can be connected
to a single chimney, provided that all appliances are sealed cham-
ber type.
�oiler is a C�type appliance (sealed chamber) and must be safely
connected to fume exhaustion duct and burning air suction duct,
both getting outside� appliance cannot operate without these ducts.
Installation "sealed" (Type C)
The boiler must be connected to concentric or twin fumes dischar-
ge and air intake ducts which must both be taken outside. Do not
use the boiler without them.
Concentric ducts (Ø 60-100 mm) (fig. 33-B)
The concentric outlets can be placed in the most suitable direction
for the requirements of the installation, respecting the maximum
lengths shown in the table.
The fumes outlet duct must be inclined 1% towards the boiler.
�on�insulated fumes outlet ducts are potential sources of
danger.
The boiler automatically adapts ventilation according to the
type of installation and the length of the duct.
Do not obstruct or narrow the comburent air inlet duct in any
way.
To install, follow the instructions supplied with the kits.
Pressure drop for each
bend (45°/90°) (m)
0,5�0,85
Horizontal
Max. linear length
concentric duct
Ø 60-100 mm
25 KIS 7,85
35 KIS 7,85
20 IS 7,85
Vertical
Max. linear length
concentric duct
Ø 60-100 mm
25 KIS 8,85
35 KIS 8,85
20 IS 8,85
�ectilinear length means without bends, outlet ends and
connections.
Concentric ducts (Ø 80-125) (fig. 33-B)
The relative adapter kit must be installed for this configuration.
Concentric ducts can be arranged in the most suitable direction for
installation requirements. To install, follow the instructions provided
with the specific kits for condensation boilers.
Max. linear length
concentric duct
Ø 80�125 mm
25 KIS 14,85
35 KIS 14,85
20 IS 14,85
�ectilinear length means without bends, outlet ends and con-
nections.
Twin ducts (Ø 80 mm) (fig. 33-C)
The twin ducts can be aimed in the most suitable direction for in-
stallation needs.
To install, follow the instructions supplied with the specific kits for
condensation boilers.
The fumes outlet duct must be inclined 1% towards the boi-
ler.
The boiler automatically adapts ventilation according to the
type of installation and the length of the ducts. Do not ob-
struct or narrow the ducts in any way.
The maximum lengths of individual pipes are shown in the
graphs.
The use of longer ducts will reduce the power output of the
boiler.
Max. linear length twin
duct Ø 80 mm
25 KIS 36+36
35 KIS 26+26
20 IS 50+50
RESIDENCE CONDENS e
Pressure drop for each
bend (45°/90°) (m)
0,5�0,85
Pressure drop for each
bend (45°/90°) (m)
0,5�0,85
Pressure drop for each
bend (45°/90°) (m)
1-1,5
Pressure drop for each
bend (45°/90°) (m)
0,5�0,8
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