E93.1803.901 HW
60
10.1.8
E
XAMPLE
C:
S
INGLE FLUE GAS OUTLET
.
A
IR SUPPLY FROM WATER HEATER ROOM
Calculation example with given lengths: checking resistance
Water heater type:
CB 105
FL
U
E
G
A
S
Diameter: 100 mm
Number
Pa
Pa total
Straight tube m¹
total
13
4,0
52,0
Bend
45°
2
9,0
18,0
Bend
90°
2
14,5
29,0
Flue outlet
zeta = 1.0
1
15,3
15,3
Total resistance flue gas:
114.3
The total resistance is less than 200 Pa.
This flue gas / air supply system is functional.
NOTE: ECO specific resistance values are used in this example.
Flue and air pipes of other suppliers can have other values
Example C (B23, B23P)
water heater type
→
CB 85
CB 105
CB 125
CB 155
Diameter air pipe
[mm]
100
100
100
150
Diameter flue pipe
[mm]
100
100
100
150
Diam. roof terminal
[mm]
100
100
100
150
Maximum pipe length [m]
includes: 2 bends 90°
2 bends 45°flue outlet zeta = 1.0
55.7
34.4
17.7
138.2
FLUE OUTLET
AIR INLET
VENTED AREA
AIR INLET
EXAMPLE: C
B23
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: ......
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