INSTALLATION, OPERATION AND MAINTENANCE MANUAL
25
The figures below are only guide figures. The draft depends on the diameter, height, roughness of the chimney wall, and the
temperature difference between combustion products and the outside atmosphere. We recommend the use of a chimney liner.
Have precise calculations carried out by a heating engineer or flue installer.
Coefficient = 0,041 (for wood)
Coefficient = 0,027 (for carbon)
F
= Section Resulting (cm2)
a
= Coefficient
Q
N
= Boiler Heat Output (kCal/h)
H
= Height of Chimney (meters)
Troubleshooting
F = a.Q
N
√
H
Problem
Reason
Solution
Boiler is not heating
Over condensation on boiler part
and formation of black liquid
Outlet temperature of boiler
is not adjusted
Boiler is heating but radiators are not
Quality of the fuel might be low
and/or the moisture content of
the fuel maybe high
Operational instructions are
not fulfilled
Tar existing on surface of
heat exchanger
Using fuel which has high moisture
Low outlet temperature
Lower door is not sealed properly
when closed
Temperature controller (draft regulator)
is not functional
Circulation pump is not working
or water circulation was blocked
(i.e. closed valve)
Try to use fuel which has better
calorific value and moisture
Inspect chimney draft, position of flap,
circulation of outlet temperature
Regularly clean the heat exchanger with
the brush supplied by Eco Angus Ltd
Use proper fuel
Try to operate the boiler with a
chimney temperature 160K above
ambient temperature
Check the sealing of the lower door
or replace it with a new one
Check functionality of the device
Check circulation system, especially
the water pump
