S-CB Px 120 Manual
29
8.7.1.
M
AXIMUM STRAIGHT LENGTHS
–
FIVE TYPICAL EXAMPLES
A
:
Twin pipe system with separate pipes for flue gas and air supply
C13, C33, C43, C63, C93
B
:
Twin pipe system with separate pipes and concentric roof terminal
C13, C33, C43, C63, C93
C
:
Single pipe for flue gas outlet only (air supply from boiler room)
B23, B23P, B33
D
:
Concentric pipe for flue gas/air supply (roof-mounted)
C13, C33, C43, C63, C93
E
:
Concentric pipe for flue gas/air supply (wall-mounted)
C13, C33, C43, C63, C93
Calculations:
Because in each of the examples A to E, the resistance of all components is known for this boiler, as well as the
resistance per straight meter, for every of these particular examples the maximum straight length can be calcula-
ted, for which the total resistance is still fulfilling the requirements, i.e.
R < 160 Pa
.
The given max. length, for twin pipe systems, is the total sum of flue gas outlet and air inlet straight lengths (Ø
100 mm), rounded to integer meters.
The given max. length, for concentric systems, is the total sum of the concentric pipe straight lengths (Ø 100/150
mm), rounded to integer meters. Results:
A
:
Maximum length air inlet + flue gas outlet = 22 m
B
:
Maximum length air inlet + flue gas outlet = 13 m
C
:
Maximum length flue gas outlet = 18 m
All examples: separate pipes Ø 100 mm and
D
:
Maximum length concentric pipes = 3 m
concentric pipes Ø 100/150 mm.
E
:
Maximum length concentric pipes = 10 m
8.7.2.
S
PECIFIC RESISTANCE CALCULATION EXAMPLE OF CONFIGURATION
B
WITH GIVEN LENGTHS
Boiler type:
S-CB Px 120
Ø
flue gas
= Ø
air
= 100 mm
number
R
R total
fl
u
e
g
a
s
Straight length m
¹
total
6
6,5
39
Bend
90°
2
6,5
13
Conc. roof terminal
100/150
1
45
45
Adaptor conc./TP
100/150
1
22
22
R
flue gas
:
119
ai
r
Straight length m
¹
total
6
4
24
Bend
90°
2
4
8
R
air supply
:
32
total:
151
→
Total resistance is 151 Pa < 160 Pa.
This system therefore fulfils the requirements.
- All pipe diameters Ø 100 mm (twin pipe) or Ø 100/150 mm (concentric)
- All lengths in m
- R = resistance
- All resistances in Pa
Q120
Q120
Q120
Example C
Example A
Example D
Q120
Example B
Q120
Example E
air
120
3
2
2
2
1
2
Summary of Contents for S-CB Px 120
Page 2: ...S CB Px 120 Manual 2 ...
Page 6: ...S CB Px 120 Manual 6 ...
Page 33: ...S CB Px 120 Manual 33 9 4 Electrical schematics ...
Page 34: ...S CB Px 120 Manual 34 ...
Page 111: ...S CB Px 120 Manual 111 ...
Page 115: ...S CB Px 120 Manual 115 weather dependent control 49 73 ...
Page 116: ......
Page 117: ......
