Roberts Gorden BH30UT/EF Manuel D’Utilisation
B
LACKHEAT
®
I
NSTALLATION
O
PERATION
AND
S
ERVICE
M
ANUAL
60 of 74
the attention of the user or purchaser; instruct them in the
safe operation of the heater(s). Advise the user that if the
system is unflued, any reduction in the natural ventilation
of the building may require a flue to be fitted, or additional
ventilation grilles will be required.
safe operation of the heater(s). Advise the user that if the
system is unflued, any reduction in the natural ventilation
of the building may require a flue to be fitted, or additional
ventilation grilles will be required.
14.6 ECA Approved Systems (Multiburner only)
On ECA approved systems, it must be verified that the
requirement of 91% net combustion efficiency is met.
Measurements of temperature and CO
requirement of 91% net combustion efficiency is met.
Measurements of temperature and CO
2
concentration in
the exhaust gasses have to be done. The net combustion
efficiency calculates as follows;
efficiency calculates as follows;
100 - [ (t
E
- t
R
) (A/CO
2m
- B) ] = net combustion efficiency
t
E
- Exhaust Temperature °C
t
R
- Room Temperature °C
A
- G20 = 0.37, G31 = 0.42
B
- G20 = 0.009, G31 = 0.008
CO
2m
- Measured CO
2
Concentration %