ECOFEL BOILER SERVICE MANUAL
6. Functional
Components:
6.1 Fan:
It is located above the combustion chamber.
They are specially designed for boilers and they operate efficiently and very
quietly. Steel propeller is balanced dynamically and fastened to the motor
axle with three screws. Its function is to vacuum the fresh air required for
combustion into the combustion chamber while evacuating the burnt exhaust
gases.
6.2 Air Pressure Switch:
It is a safety component controlling the operation of the fan and evacuation
of burnt gases in hermetic boilers. It is connected to the venturi on the fan
motor via a silicon hose. As soon as the fan motor starts, the effect of the
pressure formed on the venturi turns off the contacts. Thus, the electronic
card receives the information that the fan is running and the exhaust gas line
is clear.
6.3 Burner:
It is formed by coupling a group of stainless steel perforated
pipes by leaving an appropriate distance between them. The gas
coming from the valve passes through the injectors thus entering
the venturi of the burner and here it is mixed with primary air. It
then gets out through the numerous holes on the pipes and start
burning. The air drawn from the combustion chamber is used as
the secondary air. The quantity of primary air is self adjusted
according to the diameter of the injectors and does not require
adjustment during the initial starting phase.
During periodic maintenance, burner injectors should be
cleaned. Various dirt may partially congest the burner injectors,
thus causing a bad combustion that shows itself with a long and
smoky flame.
6.4 Circulation Pump:
Circulation pump is mounted on the return line of the heating circuit; its function is to circulate the water in the closed
system during heating and usage water production. In the body of the circulation pump there is an automatic air
purger. Circulation pump used in Airfel boilers has 5 mSS total head.
Brand : Grundfos
Model : 15/50 Three stages
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Revision Date: 29 February 2008, Rev. No: 0
HEATER CIRCUIT CIRCULATION PUMP
3rd STAGE
2nd STAGE
1st STAGE
