E93.1803.901 HW
56
Flue gas and air supply resistance table
In the next section, for six typical flue gas outlet & air inlet configurations the maximum lengths of the straight pipes
will be calculated. First all component resistance values are given in the next table:
PARALLEL
CB 85
CB 105
CB 125
CB 155
Ø
RESISTANCE [Pa]
FL
UE G
AS
100
straight tube/m
2.8
4.0
6.0
-
45° bend
6.4
9.0
13.6
-
90° bend
10.2
14.5
21.9
-
Flue outlet zeta=0.05
0.5
0.8
1.2
-
Flue outlet zeta=1.0
10.8
15.3
23.0
-
Flue outlet zeta=1.5
16.2
22.9
34.5
-
130
straight tube/m
0.7
1.0
1.5
2.2
45° bend
1.3
1.8
2.7
4.0
90° bend
3.0
4.3
6.4
9.5
Flue outlet zeta=0.05
0.2
0.3
0.4
0.6
Flue outlet zeta=1.0
3.6
5.1
7.7
11.4
Flue outlet zeta=1.5
5.4
7.7
11.6
17.2
150
straight tube/m
0.4
0.6
0.9
1.3
45° bend
0.7
0.9
1.4
2.1
90° bend
1.6
2.2
3.3
4.9
Flue outlet zeta=0.05
0.1
0.1
0.2
0.3
Flue outlet zeta=1.0
2.0
2.8
4.3
6.3
Flue outlet zeta=1.5
3.0
4.3
6.4
9.5
Roof terminal
3.4
4.8
7.3
10.8
reducer 150 to 130
2.1
3.0
4.5
6.6
AIR SUPPLY
100
straight tube/m
3.2
4.6
6.9
-
45° bend
7.4
10.5
15.7
-
90° bend
11.9
16.8
25.3
-
air inlet zeta=1.0
12.5
17.7
26.7
-
130
straight tube/m
0.8
1.1
1.7
2.5
45° bend
1.5
2.1
3.1
4.6
90° bend
3.5
4.9
7.4
11.0
air inlet zeta=1.0
4.2
5.9
9.0
13.3
150
straight tube/m
0.5
0.7
1.0
1.5
45° bend
0.8
1.1
1.6
2.4
90° bend
1.8
2.6
3.9
5.7
air inlet zeta=1.0
2.3
3.3
5.0
7.3
NOTICE: This table may only be used for a single flue/air system for one boiler.
Do NOT use this table for common flue systems with cascaded boilers.
Boiler
CB 85
CB 105
CB 125
CB 155
Ø mm
CONCENTRIC
RESISTANCE [Pa]
FL
UE G
AS
100/150
straight tube/m
2.9
4.1
6.2
-
45° bend
6.4
9.0
13.6
-
90° bend
10.2
14.5
21.9
-
roof terminal
31.2
44.3
66.7
-
wall terminal
10.8
15.3
23.0
-
adaptor
0.4
0.6
0.9
-
AIR
SUPPLY
100/150
straight tube/m
9.2
13.1
19.7
-
45° bend
8.1
11.4
17.2
-
90° bend
11.7
16.6
25.1
-
roof terminal
43.3
61.4
92.4
-
wall terminal
43.3
61.4
92.4
-
adaptor
39.2
55.6
83.8
-
* Never reduce pipe diameters relative to water heater connections
Values printed in grey applicable for larger pipe diameters than water heater connection
NOTICE: This table may only be used for a single flue/air system for one boiler.
Do NOT use this table for common flue systems with cascaded boilers.
FLUE GAS OUTLET
zeta=0
open outlet
zeta=0,05
conical outlet
H/D=1,0
zeta=1,0
H/D=0,5
zeta=1,5
AIR INLET
H/D=1,0
zeta=1,0
CONCENTRIC
FLUE GAS OUTLET
AIR INLET
ROOF
WALL
Summary of Contents for CB 105 HW
Page 69: ...E93 1803 901 HW 70 12 6 Electrical schematic...
Page 70: ...E93 1803 901 HW 71...
Page 71: ...E93 1803 901 HW 72 12 7 Ladder Logic Diagram LOW MAINS VOLTAGE VOLTAGE...
Page 127: ...E93 1803 901 HW 128 22 SPARE PARTS CB 85 HW CB 105 HW and CB 125 HW exploded view...
Page 128: ...E93 1803 901 HW 129...
Page 129: ...E93 1803 901 HW 130 CB 155 HW exploded view...
Page 130: ...E93 1803 901 HW 131...
Page 145: ......
Page 146: ......
