BRAHMA TSM User manual

IGNITION
TRANSFORMERS
TypeTSM
DESCRIPTION
The capacitive-discharge ignition transformerstype TSM
are generally used for the ignition of premixgas burnersfor
condensing boilers.
Despitetheir small dimensions, these transformersare
provided with ahigh ignition power, and they also
incorporate a filter against conducted interference.
The transformerscan be fitted to the flame control and
safety devices which are provided with an output at a
specified mains voltage forthe control of the ignition
transformer, such as the BRAHMAcontrol boxes type
CM32PR, MT11/MT31, MT191/MT391, as well as the
microcontroller-based control boxes type DM…PR.
TECHNICAL DATA
− Operating voltage 220-240V / 50-60Hz
upon request 110-120V / 50-60Hz
− Operating temperature range -20°C +60°C
− Protection degree IP00
− Recommended distance between the electrodes: 3÷5
mm
− Max. supply cable length 1 m
− Max. ignition cable length 2 m
− Weight 140gr
− Output peak voltage 15kV
− Output peak current with short
circuit secondary 250mAP
− Output effective currentwith short
circuit secondary 2,85mARMS
− Spark frequency 200Hz
− Duty cycle in 2 minutes 50%
OVERALL DIMENSIONS
The transformerscan be fixed using 2,9mm screwstype
UNI 6954 AB or DIN 7981 B.The figure belowshowsthe
main overall dimensions including the fixing wheel base.
Fig. 1
4485_r02 1/2

CONNECTION
The power supply connection of the ignition transformer
occurs by means of Stelvio 3-way connectors; the high
voltage part is connected by means of 2,8X0,5 fast-on
connectors.The following figures showthe connectors and
the wiring diagram.
FEMALECONNECTOR
S
TOCK
O: MKF 2800
S
TELVIO: BS95/. TERMINALS
STOCKO: RFB7851
STELVIO: CT84 Fig. 2
Fig. 3
Some control boxes, like forexample types MT…, are
prearranged to work with one electrode only for both
ignition and flame detection.In such cases, the wiring
diagram changes as follows:
L N
Connection diagrams
(monoelectrode)
to the flame
detection input
Fig. 4
INSTALLATION
− Connect and disconnect the ignition transformer only
after switching offpower supply.
− Respect the applicable national and European
standards (e.g. EN 60355-1 /EN 50165 /EN 61558-1-
2-3) regarding electrical safety.
− Make sure the earthof the transformer and the earth of
the electrical system are well connected The device can
be mounted in any position.
− Avoid placing high voltage cables close to other cables.
− Make sure the protection degree is suitable tothe
system.
− Reduce the ignition cable length toaminimum (this
reduces stray capacitance and the possibility that the
ignition cable acts like an antenna transferring
interference to the nearby cables).
− Make ignition cables followaseparate path close to
ground planes (this reduces the influence of
interference on the remaining electrical wires).
− Arrange asingle earth centre, thus preventing earth
conductors from creating ring paths.
L N
Connection diagrams
(bielectrode)
to the flame
detection input
Fig. 5