Brochure

OPERATING PRINCIPLE
Combustion air is drawn into the inlet connection
from the plant room (conventionally flued)
or from outside via the eccentric 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
proportions 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 ‘abc
®
’ system determines the required
boiler output. The ‘abc
®
’ 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 premix burner.
This mixture is initially ignited by the combined
ignition/ionisation probe, which monitors the
state of the flame. Should the flame be unstable
or not ignite within the pre-set safety time cycle,
the controls will (after 5 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°C/8°C
above the temperature of the system return water)
then discharged via the condensate collector, to the
flue gas outlet connection, to the atmosphere.
There will be a vapour cloud formed at the flue
gas terminal, because of the low flue gas exit
temperature - this is not smoke, simply water
vapour formed during the combustion process.
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, thereby 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.
The boiler can be supplied as an option with
a second (constant temperature) return
connection. This additional connection enables
the boiler to make full use of its condensing
ability whilst accepting both fixed and variable
temperature returns from the same system.
REMEHA GAS 310/610 ECO PRO
OVERVIEW
REMEHA GAS 310/610 ECO PRO
OVERVIEW
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