Alfa
21
hot air gas-
fi
red air heaters
In support of engineering, installation, servicing, and maintenance
52.10.03.2017.eng
Installation of fume extraction, type “C“ – Closed circuit combustion.
Suction and
fl
ue extraction are led out o
ff
the heated space. The combustion system closed
circuit must be installed where forced ventilation (air handling system) prevails in the space.
In the event when the national standards or decrees require longer safe distances, these shall
prevail over the manufacturer’s provisions.
Suction & Extraction Items
Extension AL
Order No.
Lenght
Diameter
Pressure loss
102C
250
100
3Pa/1m
105C
500
100
108C
800
100
110C
1000
100
115C
1500
100
120C
2000
100
Extension AL with wind screen
Order No.
Lenght
Diameter
Pressure loss
108CH
800
100
10Pa/1m
111CH
1000
100
115CH
1500
100
Reduction coupling AL
Order No.
Lenght
Diameter
Pressure loss
519BR
120
80/100
1,5Pa
519CR
120
100/80
Flexi extension
Order No.
Lenght
Diameter
110CF
425-1000
100
Flexi extension – SUCTION ONLY
Order No.
Lenght
Diameter
105CF
425-1000
100
Flexi extension - EXTRACTION ONLY
Order No.
Lenght
Diameter
105CV
425
100
Socket
Order No.
Lenght
Diameter
Pressure loss
515CM
150
100
1Pa
Elbow AL 90°
Order No.
Lenght
Diameter
Pressure loss
193CO
280
100
3Pa
Elbow AL 45°
Order No.
Lenght
Diameter
Pressure loss
145CO
345
100
2Pa
Condensate trap T-branch AL
Order No.
Lenght
Diameter
Pressure loss
509CK
345
100
14Pa
Condensation shutter AL
Order No.
Lenght
Diameter
552CN
70
100
Chimney head AL
Order No.
Lenght
Diameter
Pressure loss
518CS
185
100
1,5Pa
Walla passage pipe cu
ff
Order No.
V
ýš
ka
Diameter
G830C
70
100
Silicone sealing ring
Order No.
V
ýš
ka
Diameter
810CG
10
100
Fume extraction components - SINGLE-PIPE TYPE
C13
Suction and
fl
ue extraction are routed either
as separate via the horizontal suction and
extraction, or via a coaxial fume extraction.
C53
Horizontal suction inlet,
fl
ue extraction
are led as separate via a stand fume
extraction system.
B23
Combustion air is drawn in from the heated space and the
fl
ue extraction is routed as
separate, via a horizontal or vertical fume extraction system.
Installation of fume extraction, type “B“ – Open circuit combustion
Flue extraction is led out o
ff
the heated space. In the event when the national standards or
decrees require longer safe distances, these shall prevail over the manufacturer’s provisions.
min.300mm
Flue extraction
Air inlet
min.300mm
Fl
ue
e
xt
ra
ct
io
n
Air inlet
Fl
ue
e
xt
ra
ct
io
n
Air inlet
min.300mm
Flue extraction
Air inlet
p100/d1,000 = diam. 100 mm/length 1,000 mm
As stated at the individual components, the length is each time the DESIGN
length, i.e. the construction length is 50 mm less (
fl
ange depth)
Due to the
fl
ue extraction system thermal expansion our recommendation is to in-
stall a
fl
exible extension in order to avoid mechanical stresses in the ducts mainly
where they pass through ceilings or walls. Should an extraction inlet systems have
a form of a
fl
exi extension, it is NECESSARY to use properly the duct, i.e. FLUE EXTRACTION -
110CV and AIR INLET - 105CF.
Where the
fl
ue is extracted through the roof, there it is NECESSARY to incorporate in the
ducting the condensate trap 509CK and lead the condensate out of the trap to a safe
location via a hose. Insulated components should be used above the roof structure.
The S300 silicone MUST be applied to the point between the trap 509CK and the duct where
larger amounts of condensate are foreseen, mainly in winter seasons.
