D
26
Function
NEPTUNE 5 FA_EN_Ver.2.0_25/11
When the machine is running in hot water mode, the fan draws in air and leads it into the side of the
boiler, around and between the two jackets up to the air distributor. In this way the air is preheated
before it is mixed with the oil spray from the nozzle.
The cold water enters the boiler at the inner circle where the temperature is highest. By doing so, it
will minimize the condensation of water on the surface of the tube.
The fuel is drawn from the tank through the fuel filter to the pump, while in hot water mode it passes
through the magnetic solenoid valve to the nozzle in the air distributor if combustion is required.
Fuel is returned to the tank if combustion is not required.
The ignition transformer is active in hot water mode and it will form sparks between the electrodes. If
the flame is not developed, a flame sensor placed on top of the boiler will secure that fuel pump is
automatically stopped, and a fault code will be displayed on the panel.
When the machine is running normally, and the boiler is burning normally, the flame is pressed
against the insulated bottom. The temperature is here approximately. 1100°C. The hot exhaust gas
is pressed further round the labyrinth-shaped combustion chamber, where the heat is absorbed by
the water flow in the tubes.
Fig.D.2: Hot water function
Summary of Contents for NEPTUNE 5 FA
Page 1: ...Service Manual NEPTUNE 5 FA NEPTUNE 5 FA_EN_Ver 2 0_25 11 ...
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