BRAHMA MICROFLAT Series Manual

MICROFLAT SERIES
TYPES C...F
M...F
AUTOMATIC CONTROL SYSTEMS FOR
GAS BURNERS AND GAS BURNING
APPLIANCES WITH OR WITHOUT FAN
AND WITH BUILT-IN ANTI-EMISSIONS
FILTER
3997_r02
S...F
T...F
APPLICATION
This range of electronic gas burner control systems has
been specifically designed for atmospheric burners for
intermittent operation
operation), with or without fan in the combustion circuit.
These controls are provided with both non-volatile lockout
and volatile lockout: in the first case restart from the safety
shutdown condition can only be accomplished by a manual
reset of the system; in the second case restart from the
safety shutdown condition can only be accomplished by an
interruption of the main power and its subsequent
restoration.
The automatic burner control units of this series are
suitable for:
-combi boilers;
-heating boilers;
-warm air generators;
-radiant heaters;
-water heaters.
Thanks to their design and variety of models, they can also
be used for the automation of ovens, cookers and in gas
firing installations with atmospheric burner in general.
FEATURES
Table 1 shows the main features of this series. Other
important features are:
− EC
certification (CE
accordance with Gas Appliance Directives 90/396 and
93/68;
− in accordance with EN 298 (European standard for
automatic gas burner control systems and flame
detectors);
− completely solid and high efficient inbuilt ignition device
with built-in E.M. filter;
− possibility of mounting a resistor (0 ÷ 220 ohm) in series
to the valve output, in case the valves operate with
direct current obtained through the rectification of the
supply alternate current by means of one or more
diodes.
This resistor allows
disturbances generated by diodes switching;
− possibility of mounting a resistor (0 ÷ 470 Kohm) in
series to the lockout signal output, to avoid possible
damages to the control in case the connections of the
reset button and the connections of the lockout signal
are inverted;
− two independent safety contacts in series on the gas
valve output (only for non-volatile lockout types);
− auxiliary contact for low power ignition or main gas
valve control for intermittent pilot systems; this contact
is not isolated from the main supply voltage by
reinforced isolation, therefore the relay contact is not
suitable to supply SELV circuits - Safety Extra Low
Voltage, e.g.24V;
− flame monitoring by the rectification property of the
flame (ionization).
(systems for non-permanent
Reg. N° 0694BP0669)
to reduce electromagnetic
in
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