Dimensioning Single - andrews SUPAflo EVO SF60 EVO Installation And Service Manual

Flue gas system
Installation

Dimensioning single

Max length reduction
Combustion air
drawn from the B23
room
Combustion
C63
air intake from
cascade
20
Calculation base:
Total connection length in boiler room ≤ 1.5 m; 2x
87°-bend
Maximum permissible lenght (m) of flue gas system
Boiler Type
Ø130 Ø150
SF61
50 50
SF62 40 50
SF63 46
SF64 22
SF65
SF66
SF67
•
90°/87° bend: -2,5 meters
•
45°/43° bend: -1,5 meters
External flue gas exhaust. Air drawn from the room
Air and exhaust connection to separate tested and supplied air /
exhaust pipes.
Basement / floor installation.
Air and exhaust venting via exterior wall.
Exhaust venting through heat insulated exhaust pipe or moistu-
re-resistant pipe.
Exhaust line (standing air layer) at exterior wall.
The terminals for the supply of combustion air and for the eva-
cuation of combustion products shall not be installed on opposi-
te walls of the building.
Ø200 Ø250 Ø300
50
50
50 50
50 50
50 50 50
50 50 50
50 50 50
Dimensioning
When dimensioning a flue gas sys-
tem, it's necessary to perform a cal-
culation check of the flue gas sys-
tem in order to verify if the choosen
system is applicable.
The following table shows two ex-
amples of possible flue gas systems,
including the maximum possible
length of the system.
These examples only give an indica-
tion of the possible length, but they
can not be used for official flue gas
layout calculation. Each flue gas sys-
tem must be calculated by an au-
thorized company.
The maximum negative flue gas
pressure, which doesn't affect the
burner modulation ratio, is 30 Pa.
Higher negative pressure will lead to
limitation of the burner modulation
ratio.
The maximum horizontal flue gas
way is 20 m. With horizontal ways
longer than 20 m, a faultless burner
start in cold condition can not be
guaranteed.