BLACKHEAT® INSTALLATION OPERATION AND SERVICE MANUAL
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.
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 CO2 concentration in the exhaust gasses have to be done. The net combustion efficiency calculates as follows;
100 - [ (tE - tR) (A/CO2m - B) ] = net combustion efficiency
tE | - Exhaust Temperature °C |
tR | - Room Temperature °C |
A- G20 = 0.37, G31 = 0.42
B - G20 = 0.009, G31 = 0.008
CO2m - Measured CO2 Concentration %
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