REMEHA GAS 310 ECO PRO, Руководство пользователя

Страница: 7 / 32

GAS 310/610 ECO PRO
OPERATING PRINCIPLE
Combustion air is drawn into the inlet connection from the plant room (conventionally flued)
or from outside via the concentric flue system (room-sealed) by an air supply fan. On the
inlet side of the fan is a specially designed chamber (Venturi unit) which takes gas from the
multiblock and mixes it in the correct ratio with the incoming air.
This mixing system ensures that the correct gas/air ratio is
delivered to the pre-mix burner at all times. Depending on
demand (under the dictates of flow/return sensor and other
external/internal control inputs) the system determines the
required boiler output. The control then varies the speed of the
air supply fan which alters the volume of air being drawn into the
Venturi. This change in volume is measured using air pressure
differential which directly controls the volume of gas also being
delivered to the Venturi. The resultant controlled mixture is
delivered to the pre-mix burner.
This mixture is initially ignited by the combined ignition/ionisation
probe, which monitors the state of the flame. If the flame is
unstable or doesn’t ignite within the pre-set safety time cycle,
the controls will, after five attempts, shut the boiler down
requiring manual intervention to reset the boiler. The digital
display will indicate a flashing fault code confirming the reason
for the failure. The products of combustion in the form of hot flue
gases are forced through the heat exchanger transferring their
heat to the system water (the flue gas temperature is reduced
to approximately 5-8°C above the temperature of the system
return water) then discharged via the condensate collector, to
the flue gas outlet connection – and then into the atmosphere.
A vapour cloud will form at the flue gas terminal due to the
low flue gas exit temperature. When the flue gas temperature
falls below dew point (55°C), water vapour created during the
combustion process will begin to condense out in the boiler,
transferring its latent heat into the system water, increasing the
output of the boiler without increasing the gas consumption.
Condensation formed within the boiler and flue system is
discharged from the boiler to an external drain via the drain
pan and siphon supplied.
07
OPERATING
PRINCIPLE