E93.1803.901 HW
58
10.1.7
E
XAMPLE
B:
T
WIN PIPE SYSTEM WITH CONCENTRIC ROOF TERMINAL
Calculation example with given lengths: checking resistance
Water heater type:
CB 125
Flue gas
Diameter: 100 mm
Number
Pa
Pa total
Straight tube /m
total
6
6.0
36.0
Bend
90°
2
21.9
43.8
Roof terminal
concentric
100/150
1
66.7
66.7
Adaptor conc./par.
100-100 >
100/150
1
0.9
0.9
Total resistance flue gas outlet:
147.4
A
ir
su
pp
ly
Diameter: 100 mm
Number
Pa
Pa total
Straight tube /m
total
6
6.9
41.4
Bend
90°
2
25.3
50.6
Roof terminal
concentric
100/150
1
92.4
92.4
Adaptor conc./par.
100-100 >
100/150
1
83.8
83.8
Total resistance air supply:
268.2
Total resistance flue gas outlet and air supply:
415.6
The total resistance is more than 200 Pa.
This flue gas / air supply system is NOT functional.
NOTE: ECO specific resistance values are used in this example.
Flue and air pipes of other suppliers can have other values
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...
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