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17
www.bromicheating.com
OPERATION DATA - BRAHMA CONTROL BOX
The following operation sequence is valid only where the
components are installed according to the manufactures
assembly and installation instructions. Please do not modify the
wiring configuration, gas train or any other part of the heater
assembly.
Application
The Brahma electronic gas burner control system is suitable
for atmospheric gas burners for non-permanent operation.
Although the Brahma unit is capable of non volatile lockout, its
configuration in the Platinum Smart-Heat series heaters limits it
to volatile lockout, i.e. the restart from this condition is possible
by the interruption and subsequent restoration of the mains
power supply.
Features
• Compliance with EN 298 (European standard for
automatic gas burner flame monitoring and control
systems)
• Compliance with AGA (Australian standard for automatic
gas burner flame monitoring and control systems)
• Flame monitoring based on rectification property of the
flame (ionisation)
• Two independent safety contacts in series on the gas
valve output
• Electrical service life at max. declared loading > 250.000
operations
• Inbuilt ignition device with completely solid state design
and high efficiency
Directions for use
• Automatic controls are safety devices and shall not be
opened. The manufacturer’s responsibility and guarantee
are invalid if the control is unduly opened.
TECHNICAL DATA
Supply voltage 23V-50/60Hz
Operating temperature -20°C +60°C
Ambient humidity 95%max at 40°C
Protection degree IP00
Timings:
Prepurge or waiting time 10 s
Safety time (TS) 10 s
Drop out time on running flame failure < 1 s
Power consumption, at start up 10VA
Power Consumption, Running 7VA
Ignition
Ignition Voltage 20kV with 30pF load
Spark repetition rate 25 Hz
Max. Cable length 2 m
Recommended spark gap 2-4mm
Consumption 2,5 VA
Spark energy 15 mJ
• A regulation shutdown must occur every 24hours to
enable the unit to check its own efficiency (systems for
non permanent operation)
• Connect and disconnect the unit only after switching off
the power supply
• Avoid exposing the unit to dripping water
• Ventilation and the lowest temperature ensures the
longest life of the control
Electrical Installation
• The applicable state and Australian standards (eg.
AS3350) regarding electrical safety must be respected.
• Live and Neutral should be connected correctly; a
mistake could cause a dangerous situation.
• Before starting the system check cables carefully for
incorrect installation
• The earth terminal of the control, the metal frame of the
burner and the earth on the mains supply must be well
connected
Operation
At every start, the control unit proceeds to a self-checking
of its own components. During the pre-purge or waiting
time (TW) the internal circuit makes a test of the flame signal
amplifier. Extraneous light or fault in the amplifier will result
in the simulation of a flame which will prevent the control
from starting.
At the end of the waiting or pre-purge time, the gas valve is
energised and the ignition device is operated. In this way, the
safety time (TS) begins.
If a flame is detected during the safety time, the ignition
device is inhibited and the gas valve remains energised.
If the control does not detect any flame signal during the
safety time, at the end of safety time (TS), the unit proceeds
to lockout and the gas valve and ignition device are switched
off.
If the established flame signal is lost, (during the safety time
or during operation thereafter) this will cause the ignition
device to be reactivated within 1 second.
If the burner does not light within 10 seconds of ignition
reactivation, the heater will enter failure lockout mode and
must be reset.
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