Atmos Multi 24/80, Инструкция по установке и обслуживанию

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ATMOS MULTI version 2002 Page 11
then falls to the bottom of the heat exchanger where it
is automatically discharged via the boiler's condense
drain point.
5.2 Operating principle of the appliance
q
No heat demand
The appliance will carry out a self-test every 24
hours when the connected to an available
electrical supply. For this test the boiler's
integral central heating pump will run for 3
minutes and the three-way valve will switch to
central heating in order to prevent the pump
from seizing.
q
Meeting the heat demand (continuous
comfort mode)
If there is demand for heating and domestic hot
water at the same time, the hot water demand
has priority over the heating demand. This is
achieved by constant regulation of the three-
way valve from the control unit. The
'continuous comfort' mode may be switched off
if not required.
The central heating is controlled using a
standard 24V room thermostat or modulating
room thermostat. The domestic hot water
temperature is controlled by a 'user' setting,
which is adjusted via the control unit.
q
Heat supply
When there is a demand for central heating, the
boiler's integral central heating pump and
combustion fan are automatically switched on.
Burner ignition occurs on the combustion fan
reaching its regulated speed. If no flame signal
is detected after 5 seconds, three more attempts
for burner ignition will be made within a 15-
second period, after which the appliance will
shut down.
On a loss of flame the appliance will carry out
four restart attempts, after which the appliance
will shut down. If the temperature of the central
heating water reaches 90
°
C, the burner will
automatically be extinguished. The appliance
has an anti-cycling time of 3 minutes during
which the burner will not re-ignite. The anti-
cycling period may be changed via the control
panel to 6 minutes or alternatively, switched
off.
On reaching the heating demand the burner will shut
down and the central heating pump continues to run
for a further one-minute period after which, the three-
way valve will switch to domestic hot water heating.
The pump will then run in hot water heating mode for
20 minutes (Factory setting). The pump running
times may be adjusted to suit individual system
requirements (see separately available Atoms Multi
Service Manual).
An insufficient heating water flow rate will be
detected by the high limit thermostat, which on
activation will cause the appliance to shut down.
q
Combustion
The appliance is equipped with a continuously
modulating burner. The burner's heat input may be
manually set to suit individual system requirements
by adjustment of the fan pressure via a mechanical
gas -air connection. The appliance heat input
automatically reduces as the central heating flow
temperature reaches 80°C or higher.
q
Most Efficient Start
Most Efficient Start is a comfortable energy saver,
which ensures that the home is heated as efficiently
as possible. When there is a central heating demand
the appliance always starts heating the home on a
low burner heat input. The amount of time at which
the burner continues to operate at low input
depends upon the heating demand of the heating
system.
After either first connecting the appliance to the
power supply, resetting following shut down or
following a 180 minute period with no heat demand,
the burner will operate on a low heat input for 3
minutes, thereafter it is self adjusting.