QUINTA ACE RANGE
OPERATING PRINCIPLE
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 above the temperature of the system return water, then discharged vertically
via the condensate collector, through the 80/125mm (Quinta Ace 30/45) or 100/150mm
(Quinta Ace 55/65/90/115, 135 and 160) combined flue/air connection to atmosphere.
Because of the low flue gas exit temperature, there will be a
vapour cloud formed at the flue gas terminal. If the controls
allow the flow and therefore return temperature to fall below dew
point (55ºC), this water vapour will begin to condense out in the
boiler, transferring its latent heat into the system water, increasing
the output of the boiler without increasing gas consumption.
Any condensate which is able to flow back into the boiler, from
flue lengths greater than one metre, must be discharged via a
condensate collector and drain system fitted within one metre of
the boiler flue connection.
Combustion air is drawn into the closed air box by a variable speed
fan, through the air inlet connection from the plant room (open-
flued) or from outside via the concentric flue system (room-sealed).
On the inlet side of the fan is a specially designed Venturi which
is connected to the outlet side of the gas combi-block.
Depending on the demand (under the dictates of flow/return
sensor and other external/internal control inputs), the electronic
control unit directly monitors the volume of gas and air being
delivered to the premix burner. This mixture is initially ignited
by the combined ignition/ionisation probe which then monitors
the state of the flame. Should the flame not ignite or be unstable
within the pre-set safety time cycle, the controls will shut the
boiler down (after five attempts) requiring manual intervention
to reset the boiler. The digital display will also indicate a
flashing fault code, confirming the reason for the failure.
Summary of Contents for Quinta Ace 115
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