Eco Heating Systems CB 105 HW, Installation, Service And User Manual

Page: 60 / 147

E93.1803.901 HW 61
10.1.9 E
XAMPLE
D: C
ONCENTRIC FLUE GAS
/
AIR SUPPLY PIPE
(
ROOF
-
MOUNTED
)
Calculation example with given lengths: checking resistance
Water heater type: CB 85
FL
U
E
G
A
S
Diameter: 100/150 mm.
quantity
Pa Pa total
Straight tube m total 11
2.9 31.9
Bend 45° 2
6.4 12.8
Bend 90° 3
10.2 30.6
Concentric terminal roof 1
31.2 31.2
resistance flue gas: 106.5
A
IR
S
U
P
P
LY
Diameter: 100/150 mm.
quantity
Pa Pa total
Straight tube m total 11
9.2 101.2
Bend 45° 2
8.1 16.2
Bend 90° 3
11.7 35.1
Concentric terminal roof 1
43.3 43.3
resistance air supply: 195.8
Total resistance flue gas and air supply: 302.3
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
10.1.10 E
XAMPLE
E: C
ONCENTRIC SYSTEM
W
ALL OUTLET
C13 (
WALL
-
MOUNTED
)
Calculation example with given lengths: checking resistance
Water heater type: CB 85
FL
U
E
G
A
S
Diameter: 100/150 mm.
quantity
Pa Pa total
Straight tube m total 9
2.9 26.1
Bend 90° 1
10.2 10.2
Concentric terminal wall 1
10.8 10.8
resistance flue gas outlet: 47.1
A
IR
S
U
P
P
LY
Diameter: 100/150 mm.
quantity
Pa Pa total
Straight tube m total 9
9.2 82.8
Bend 90° 1
11.7 11.7
Concentric terminal wall 1
43.3 43.3
resistance air supply: 137.8
Total resistance flue gas outlet and air supply: 184.9
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