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10.4
FLUE SYSTEM TECHNICAL DETAILS AND MAXIMUM FLUE LENGTH
Model Number
FLUE DATA TYPE B
23
Nominal flue diameter – mm
Maximum flue gas temp. – C
Maximum equivalent length – m
Equivalent length 90 bend – mm
Equivalent length 45 bend – mm
Flue gas temperature – C
Flue draught requirements – mbar
FLUE DATA TYPE C
& C
13
33
Nominal flue diameter – mm
Maximum flue gas temp. – C
Maximum equivalent length – m
Equivalent length 90 bend – mm
Equivalent length 45 bend – mm
FLUE DATA TYPE C
& C
43
53
Nominal flue diameter – mm
Average flue gas temp. – C
(80/60 Flow/Return)
Maximum flue gas temp. – C
Maximum equivalent length – m
Equivalent length 90 bend – mm
Equivalent length 45 bend – mm
10.4.1
FLUE SYSTEM TECHNICAL DATA TABLE
‡
EKW146CE, EKW176CE, EKW206CE and EKW236CE use a Twin pipe (Parallel) flue system
terminating at a concentric terminal. The flue system is to be constructed from 150mm single wall
components.
*
On twin pipe systems, the maximum equivalent length is the sum of the air inlet components and the
exhaust components.
10.5
FLUE DISCHARGE
The flue system must ensure safe and efficient operation of the equipment to which it is attached, protect the
combustion process from wind effects and disperse the products of combustion to open external air.
The flue must terminate in a freely exposed position and be so situated as to prevent the products of combustion
entering any opening in a building. For installations with a total output above 200kW the clean air act should be
consulted and complied with.
Under certain operating and weather conditions, the EcoKnight™ water heater may generate a plume at the terminal.
Consideration should be given to the nuisance this may cause and the terminal should be sited accordingly.
For further information on terminal locations, please refer to Section 10.6.1 FLUE TERMINAL POSITIONS.
10.6
CONDENSATE DRAIN
If the flue system rises at an angle of at least 3 (50mm per metre), no additional condensate drain will be required.
Failure to provide an adequate rise in the flue system may lead to pooling of condensate which may lead to
premature failure of the flue system.
EKW46CE
EKW61CE
EKW86CE
80
1000
500
80/125
30
1000
500
80
1000
500
EKW116CE
EKW146CE
100
120
60
70
-0.03 to -0.1
100/150
120
100
70
120
60*
EKW176CE
EKW206CE
EKW236CE
150
1500
900
N/A see note below ‡
30‡
1500
900
150
1500
900
18
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