BRAHMA EUROBOX Series User manual

15756_r02
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44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวัฒนา กทม. 10170.
website: https://www.add-furnace.com/ โทร: 02-888-3472
Line ID: @add11 e-mail: [email protected]
EUROBOX SERIES
TYPES CM...N SM...N MM...N
AUTOMATIC CONTROL SYSTEMS FOR
GAS BURNERS AND GAS BURNING
APPLIANCES WITH OR WITHOUT FAN
(MANUAL RESET)
DESCRIPTION
This series of electronic systems is suitable to control
atmospheric gas burners for non-permanent operation with
or without fan in the combustion circuit.
All control units are provided with non-volatile lockout, i.e.
restart from the safety shutdown condition can only be
accomplished by manually resetting the system.
The control units of this series are suitable for:
- combi boilers
- heating boilers
- hot air generators
- radiant tube heaters
- water heaters.
Their technical and manufacturing characteristics and the
variety of models make them suitable also for the
automation of ovens, cookers, stoves and, more generally,
for gas firing appliances equipped with atmospheric burner.
FEATURES
Table 1 shows the main features of this series.
Other important features are mentioned below:
–EC type examination certificate (EC Reg. no. 51BT3691)
in accordance with the European Gas Appliance
Directive 90/396 and the following amendment 93/68;
in compliance with EN298:2003 (European standard for
automatic gas burner control and flame detection
systems);
flame detection exploiting the flame rectification effect
(ionization);
two independent safety contacts in series on the gas
valve output;
electrical service life at max declared loading > 250.000
operations;
inbuilt manual reset; some models can be provided with
remote reset;
incorporated highly efficient and completely solid-state
design ignition device;
 auxiliary contact for low-power ignition or main valve
control for intermittent pilot systems (this is not a SELV
contact and is therefore not suitable to control circuits
type SELV –Safety Extra Low Voltage, e.g. 24V–);
different connection and fixingpossibilities.

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15756_r02
44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวัฒนา กทม. 10170.
website: https://www.add-furnace.com/ โทร: 02-888-3472
Line ID: @add11 e-mail: [email protected]
TABLE 1
BURNER
OPTIONS
RESET
CONNECTION
Single flame
Double flame
Atmospheric without fan
Atmospheric with135
fan
Auxiliary contact (1)
Single electrode
External ignition device
Remote
Inbuilt
Classification according to
EN298 (2)
EN298:2003 compliant (3)
Socket P
Socket R
Socket NG
Socket MG
CM191N
*
*
(B)
(A)
AMCLXN
*
*
*
*
SM191N
*
*
*
(A)
AMCLXN
*
*
SM192N
*
*
(B)
(A)
AMCLXN
*
*
*
*
CM381N
*
*
(B)
(A)
FMCLXN
*
*
*
*
CM391N
*
*
(A)
FMCLXN
*
*
SM152N
*
*
(B)
(A)
AMCLXN
*
*
*
*
SM592N
*
*
*
(B)
(A)
AMCLXN
*
*
*
*
MM191N
*
*
*
(B)
(A)
AMCLXN
*
*
*
*
MM192N
*
*
*
(B)
(A)
AMCLXN
*
*
*
*
NOTE: (A) Box type xxxxxx.1 –xxxxxx.2
(B) Box type xxxxxx.3 –xxxxxx.4
TECHNICAL DATA
Power supply: 230V50/60Hz
on request: 110/120V50/60Hz
Operating temperature range: -20C +60C
Humidity: 95% max at 40°C
Protection degree:
socket NG IP 40 (after installation)
socket P/R IP 00
Times:
waiting/pre
-purge time (TW): 1,5..40 s
TW for type SM152N 3..40 s
safety
time at start-up (TS): 3..60 s
 response time in case of flame failure 1 s
The times appearing on the product label correspond to guaranteed
values. Actual times may differ from declares ones, as waiting and
pre-purge time may be longer and safety time shorter than their
nominalvalues.
Power consumption at start-up:
atmospheric burner 10VA
atmospheric fan-assisted burner 12VA
Power consumption during operation: atmospheric
burner 7VA
atmospheric fan-assisted burner 9VA
Max contact rating: Imax
- Thermostat: 4A cos≥ 0.4
- EV1: 0.5A cos≥ 0.4
- EV2: 0.5A cos≥ 0.4
- EVG: 0.5A cos≥ 0.4
- Fan: 1A cos≥ 0.4
- Lockout signal: 0.5A cos= 1
- Auxiliary contact: 0.5A cos≥ 0.4
- External ignition device: 1.5A cos≥ 0.2
Max cable length for
external components: 1 m
Internal fuse rating: 5A slow-blow
External fuse rating: 3.15A fast-blow
Flame monitoring:
The flame detection device exploits the rectification property of the
flame (ionization); the device is not provided with any protection
impedance and is therefore not safe against the risk of electric
shock.
(1): The auxiliary contact is not type SELV (Safety Extra Low Voltage) and is therefore
not suitable to control SELV circuits.
(2): Flame failure during TS causes spark restoration.
(3): Label showing the marking “EN298:2003 compliant” and part reference provided with
suffix N.
- Min ionization current: 0.5A
on request: 1.2A
- Recommended ionization current: 35 times the minone
- Max cable length: 1 m
- Min insulation resistance of detection
cable and electrode to earth: 50M
- Max electrode stray capacitance: 1nF
- Max short-circuit current: 200A AC
- Max ionization current (230 V50 Hz): 8A DC
Ignition:
- Ignition voltage: 8KV with 30pF load
- Spark repetition rate: 25Hz
- Max cable length: 2m
- Recommended spark gap: 2-4mm
- Power consumption: 2.5VA
- Spark energy: 15mJ
Weight:
with socket P or R: 220g
with socket NG or MG: 275g
Control units for special applications:
Upon request it is possible to meet particular requirements
regarding times, spark repetition rate, min ionization current and
operating cycle.
CONSTRUCTION
The plastic casing protects the control unit from any damage
resulting from impacts, tampering, dust and contact with the
external environment.
A particular construction technique, consisting of four PCBs
assembled together to form a "box" structure, has enabled to
considerably reduce the dimensions of thedevice.
A varistor protects the control unit from any voltage transients
which may arise in the mains supply.
An inbuilt fuse protects the internal relays of the unit in case of short
circuit on the control outputs (valves, fan and lockout signal). As
this fuse is not accessible, the unit will have to be protected by an
external fast-blow fuse suitable to the loads connected and never
exceeding 3,15A.

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44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวัฒนา กทม. 10170.
website: https://www.add-furnace.com/ โทร: 02-888-3472
Line ID: @add11 e-mail: [email protected]
OVERALL DIMENSIONS
The EUROBOX series burner control units can be provided with a
different casing according to the characteristics and fixing systems
required.
Casings are available with or without reset push-button and can be
equipped with lateral fixing brackets or not. Please note that the
units equipped with lateral fixing brackets can be fitted to sockets
type "P" or "R" only, as these are provided with suitable fixing
hooks. The numeric suffix in the part reference indicates the type of
casing:
1 with reset push-button; with fixing brackets
2 with reset push-button; without fixing brackets
3 without reset push-button; with fixing brackets
4 without reset push-button; without fixing brackets The
possibility of using casings without reset push-button is restricted to
the control units prearranged for remote reset. Fig.1 shows the
overall dimensions of theunits.
CM381. Socket type P differs from type R on positions 8 and 10
for the availability of through holes to suit female fast-on terminals
of standardtype.
As regards the connection of the control units, strain relieves and
a sufficient number of earth and neutral terminals should be
available in the appliance or in external connection boxes.
Fig.1
ACCESSORIES
The control units are usually supplied with inbuilt reset push-button;
versions with remote reset supplied with a suitable light reset push-
button are also available (see Fig.2).
The casings of the control units are prearranged for the use of
strain relieves/cable glands to be mounted on their sides; also
these accessories can be supplied upon request (see Fig.3).
RESET PUSH-BUTTON DRILLING PLANE
Socket R Fig. 4
CODE 81020980
Reset 1
Lockout signal 2
3 Neutral
Fig.2
Fig.3
INSTALLATION DIRECTIONS
Socket NG Fig. 5
CONNECTION
For this series of burner control units, various interconnection
solutions are possible. In fact, different types of connecting
sockets can be used (see Fig.4 and Fig.5): types NG (code
18210094) and MG (code 18210113) are equipped with screw
terminal board, whereas types P (code 18210096) and R are
provided with a number of fast-onholders.
Socket type MG differs from type NG for the availability of an
auxiliary terminal requested for the control unit type
A regulation shutdown should occur every 24 hours to enable
the unit to check its own efficiency (systems for non-permanent
operation).
Ignition systems are safety devices; the manufacturer's
responsibility and guarantee are invalidated in case of
Customer's tampering with the product.
Connect and disconnect the control unit only after switching off
the powersupply.
The unit can be mounted in anyposition.
Avoid exposure to dripping water.

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website: https://www.add-furnace.com/ โทร: 02-888-3472
Line ID: @add11 e-mail: [email protected]
A ventilated installation environment and a suitably low
temperature ensure the longest life of the control system.
Before installing or replacing the unit, make sure that the type,
code and times are correct.
The control systems specified as IP00 should be installed in
appliances providing adequate protection against the risk of
electric shock (at leastIP20).
ELECTRICAL INSTALLATION
Respect the applicable national and European standards
regarding electrical safety (e.g. EN 60335- 1/EN 50165).
Connect live and neutral correctly. The non-observance of
live-neutral polarity may cause a dangerous situation, as
internal and external protection and safety devices may
become ineffective in case the connection cables of the
thermostats and the valves should lose their insulation.
Besides, the non-observance of live- neutral polarity causes
lockout at the end of the safety time at start-up.
Before starting the system check the cables carefully. A wrong
wiring can damage the unit and compromise the safety of the
appliance.
Make sure that the earth terminal of the control system, the
metal frame of the burner and the earth of the mains supply are
well connected.
Avoid placing the detection cable close to power or ignition
cables.
Use heat resistant detection cables and electrodes, and make
sure that they are well insulated to earth and protected from
possible moisture or water ingeneral.
Keep the ignition cable as short and straight as possible and
place it far from other conductors to reduce the emission of
electromagnetic interference (max length
<2m and insulation voltage >25kV).
In case of a live-neutral network with unearthed neutral or a live-
live network (with unearthed star centre), the control unit can
operate as well thanks to an inbuilt resistor; however, in these
cases we recommend using our step-up transformer type AR1.
In case of bad insulation between live and earth, the voltage on
the ionization probe can be reduced until it causes the lockout of
the control unit.
CHECKING AT START-UP
Check the control system before the first start-up, after any
overhaul and after a long period of non-operation. Before any
ignition attempt make sure that the combustion chamber is free
from gas, then check the following:
if the start-up attempt occurs without gas supply, the control
system should go to lockout at the end of the safety time;
when stopping the gas flow while the control system is running,
the power supply to the gas valve(s) should be interrupted
within 1s, and the control system should proceed to lockout
after a recyclingattempt;
operating times and sequence should correspond to those
declared for the type of control unit you areusing;
the level of the flame signal should be high enough (see Fig.6
for the measuring method toadopt);
the ignition probe should be adjusted in the most stable way for
a spark gap between 2-4 mm;
the intervention of limiters or protection devices should cause a
safety shutdown according to the type of application.
OPERATION
At every start-up the control system performs a self- checking of
its own efficiency. During the waiting or pre- purge time (TW) the
internal circuit tests the correct operation of the flame signal
amplifier. Extraneous light or a
fault in the amplifier leading to flame simulation prevent the control
system from starting.
In the types with fan control, before the beginning of the pre-purge
time the air pressure switch contacts are checked to prove their
"no-air-flow" condition. If this test is positive, the air pressure
switch detects the air flow and consequently switches to "air-flow"
position, allowing in this way the pre-purge time to begin.
At the end of the waiting or pre-purge time, the gas valve is
energized and the ignition device is operated. In this way the
safety time (TS) begins.
If a flame signal is detected during the safety time, the ignition
device is disabled and, in some models, the independent auxiliary
contact (SM191N) or the main valve control switch from "off" to
"flame-on" position.
Else, if no flame signal is detected during the safety time, at the end
of the same the control system goes to lockout, the gas valve is
closed, the ignition device disabled and the lockout signal
energized.
Flame failure during the safety time causes the ignition device to be
re-activated within one second.
Please see the attached operating cycle diagrams to better
understand the operation of each control unit.
RESETTING THE CONTROL UNIT
In case of lockout, wait at least 10 seconds before trying to reset
the unit; if this time is not observed, the system may not reset
correctly. In general, the reset push-button should be visible and
placed near the appliance. Reset can only occur by an intentional
manual operation and not by means of any automatic devices such
as thermostats or timers.
In the appliance it is possible to combine the reset push- button
with the main switch; in this case, however, a light alarm will have
to be installed.
Fig.6
DETECTION
ELECTRODE
IGNITION
ELECTRODE

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44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวัฒนา กทม. 10170.
website: https://www.add-furnace.com/ โทร: 02-888-3472
Line ID: @add11 e-mail: [email protected]
CONNECTION DIAGRAMS
TYPE CM191N TYPE CM391N
TYPE SM191N TYPE SM192N SM152N
TYPE MM191N TYPE MM192N
TYPE CM381N TYPE SM592N
THERMOSTAT FAN AIR PRESSURE FUSE BURNER LOCKOUT FIRST SECOND AUXILIARY MAIN EXTERNAL
SWITCH SIGNAL GAS VALVE GAS VALV CONTACT SWITCH IGNITION
TRANSFORMER
NOTE: Connect the limit thermostat in series to the live.
IGNITION
IGNITION
IGNITION
IGNITION
DETECTION
DETECTION
DETECTION
DETECTION
IGNITION
IGNITION
IGNITION
DETECTION
DETECTION
DETECTION
DETECTION

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15756_r02
44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวัฒนา กทม. 10170.
website: https://www.add-furnace.com/ โทร: 02-888-3472
Line ID: @add11 e-mail: [email protected]
OPERATING DIAGRAMS
TYPE CM191N –MM191N TYPE CM391N –CM381N
TYPE SM191N TYPE SM192N –MM192N
TYPE SM152N
TYPE SM592N
THERMOSTAT
FAN
AIR PRESSURE
IGNITION
FLAME LOCKOUT
FIRST
SECOND
AUXILIARY
EXTERNAL IGNITION
SWITCH
DEVICE
SIGNAL SIGNAL
GAS VALVE
GAS VALVE
CONTACT
TRANSFORMER
ATTENTION -> Company Brahma S.p.A. takes no responsibility for any damage resulting from Customer's tampering with the device.