44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวฒั นา กทม. 10170.

website: https://www.add-furnace.com/ โทร:02-888-3472

Line ID: @add11 Wechat ID: add0883001122

MICROFLAT SERIES
TYPES C.../U T… X… APPLICATION
This range of electronic gas burner control systems is suitable
for atmospheric gas burners for non-permanent operation with
AUTOMATIC GAS BURNER CONTROL or without fan in the combustion circuit.
SYSTEMS FOR GAS BURNERS AND GAS These controls are provided with both non volatile lockout, i.e.
BURNING APPLIANCES WITH OR the restart from this condition is only possible by manual
WITHOUT FAN reset, and volatile lockout, i.e. the restart from this condition is
possible by the interruption and subsequent restoration of the
mains supply.
The automatic burner control units of this series are suitable
for:
– combi boilers
– heating boilers
– hot air generators
– radiant heaters
– water heaters.
Thanks to the design and variety of models, they can also be
used for the automation of ovens, cookers, stoves and in gas
firing appliances with atmospheric burner in general.

FEATURES
Table 1 shows the main features of this series. Other
important features are:
 CE type certification in accordance with Gas Appliance
Directive 90/396 and subsequent modifications 93/68 (see
table 1);
 in compliance with EN 298 (European standard for
automatic gas burner flame monitoring and control
systems);
 flame monitoring based on the rectification property of the
flame (ionization);
 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;
 auxiliary contact for low power ignition or main gas valve
control for intermittent pilot systems type SELV, therefore
suitable to control circuits type SELV - Safety Extra Low
 Voltage, e.g. 24V (see Table 1);
 volatile lockout in case of flame loss in running condition
for type CE12U NR.

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 44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวฒั นา กทม. 10170.
website: https://www.add-furnace.com/ โทร:02-888-3472
Line ID: @add11 Wechat ID: add0883001122
BURNER OPTIONS Max. length of the cables of
TABLE 1
external components: 1m
Internal fuse rating: 3.15 A quick acting

running state
External fuse rating: 2 A quick acting
Flame monitoring:
The flame detection device makes use of the rectification
property of the flame (ionization). This device is not provided

(2)
with any protection impedance, therefore the flame detection

classification code according to 298

to flame failure
electrode is not safe against electric shock.
– Minimum ionization current: 1.2mA
electrical reset from lockout

provision
on request: 0.5mA
manual reset from lockout

– Recommended ionization current:

atmospheric without fan

3 ÷ 5 times the
minimum ionization current
atmospheric with fan

lockout due
auxiliary contact

– Max. length of the cable:

thermostat

stelvio - stocko 1m
– Minimum insulation resistance of cable and flame
double flame
single flame

detection device to earth: ³50MW

CE PIN
volatile

Max. stray capacitance of the detection probe: £1nF

safety

molex

Max. short circuit current: < 200mA AC

in

Ignition:
CM11U     AMCLXN 63AQ0625 – Ignition voltage: 20 kV with 30pF load
CM12U    (1)  ATCLXN 63AQ0625 – Spark repetition rate: 25 Hz
CM31U     FMCLXN 63AQ0625
– Max. cable length: 2m
CE11U     AMCVXN 63AQ0625
CE12U    (1)  ATCVXN 0694BP0669 – Recommended spark gap: 2-4 mm
CE12U NR    (1)  ATVVXN 0694BP0669 – Consumption: 2,5 VA
CE31U     FMCVXN 63AQ0625 – Spark energy: 15 mJ
TM11     AMCLXN 63AQ0625
Weight: 170 g
TM12      ATCLXN 63AQ0625
TM31     FMCLXN 0694BP0669
Controls for special applications:
TE11     AMCVXN 63AQ0625 On request it is possible to meet special requirements
TE12      ATCVXN 63AQ0625 concerning timings, spark repetition rate, minimum ionization
TE31     FMCVXN 63AQ0625 current and operating cycle.
XM11      AMCLXN 63AQ0625
XM12       ATCLXN 63AQ0625
CONSTRUCTION
XM31      FMCLXN 63AQ0625 The enclosure made of plastic material protects the control
XE11      AMCVXN 63AQ0625 from mechanical damages, dust and dirt from the conditions
XE12       ATCVXN 63AQ0625 of installation.
XE31      FMCVXN 63AQ0625
Through the use of surface mounted components, it has been
(1) The auxiliary contact is not type SELV (Safety Extra Low
possible to reduce the printed circuit board dimensions and to
Voltage, e.g. 24 V) and therefore not suitable to control SELV
develop even the most complex executions with extremely
circuits.
compact dimensions.
(2) Flame failure during TS causes spark restoration.
A varistor protects the control from voltage transients in the
TECHNICAL DATA mains supply.
Supply voltage: 230V-50/60Hz An internal fuse protects the relays of the control box in case
on request: 110/120V-50/60Hz of short circuits on the outputs (valves, fan and lockout
CE12U NR 240V 50/60 Hz signal). As this fuse is not accessible, the control must be
Operating temperature range: -20°C …. +60°C protected with an external fast blow fuse suitable to the load
Ambient humidity: 95% max at 40°C connected and never exceeding 2 A.
Protection degree: IP 00 It is possible to have an internal fuse accessible from the
Timings:
outside by means of a plastic clip. The models with this
– Prepurge or waiting time (TW): 1...60 s
provision are identified by the /F suffix.
– Safety time (TS): 3...60 s
– Drop-out time on running flame failure: <1s OVERALL DIMENSIONS
The times given on the burner control label correspond to
The control units of the MICROFLAT series can be supplied in
guaranteed values. Actual values can slightly differ from the
different executions but with the same enclosure.
values given, as prepurge and waiting times can be longer
The following figure (Fig. 1) shows the overall dimensions of
and safety time shorter than their nominal values.
the controls.
Power consumption, at start-up:
atmospheric burner 10 VA
atmospheric fan-assisted burner 12 VA
Power consumption, running:
atmospheric burner 7 VA
atmospheric fan-assisted burner 9 VA
Contact rating: I max
– Thermostat: 3 A cos j = 0.4
– VG1: 0.5 A cos j = 0.4
– VG2: 0.5 A cos j = 0.4
– Fan: 1 A cos j = 0.4
– Alarm: 0.5 A cos j = 1
– Auxiliary contact: 0.5 A cos j = 0.4 Fig.1

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 44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวฒั นา กทม. 10170.
website: https://www.add-furnace.com/ โทร:02-888-3472
Line ID: @add11 Wechat ID: add0883001122

ACCESSORIES Connecting systems (4b) and (4c) guarantee the signalling of

Upon request the controls can be supplied with female the lockout status and the possibility to reset the control also
connectors and reset button (see fig. 2); do not fit terminals when the thermostat or the regulation ring is open, provided
and connectors of different types. that a neon lamp is used as signal (see Fig.4). The connector
RESET P/BUTTON DRILLING PLAN J2 is prearranged for the connection of a safety thermostat
that, in case of intervention, stops the supply to the gas valve
VG1 and causes a safety shutdown after a delay which is the
sum of waiting (prepurge) and safety times (see Fig.5).

RESET
NEUTRAL
LOCKOUT S.

FEMALE CONNECTORS TERMINALS

Fig.5
DIRECTIONS FOR USE
 Automatic controls are safety devices and shall not be
FEMALE CONNECTORS TERMINALS
opened. The manufacturer's responsibility and guarantee
are invalidated if the control is unduly opened.
 A regulation shutdown must occur every 24 hours to
Fig.2
enable the unit to check its own efficiency (systems for
CONNECTION
non-permanent operation).
The use of non-reversible connectors with a different number
 Connect and disconnect the unit only after switching off
of poles makes connection easy and reliable. One way fast-on
power supply.
connectors of different sizes for ignition and detection

 The control can be mounted in any position.
electrodes enable their easy installation and replacement.

 Avoid exposing the control unit to dripping water.
The double-output ignition device enables spark generation on
 Ventilation and the lowest temperature ensures the
one point (3a), two points (3b) or between two electrodes
longest life of the control.
isolated from the metal frame of the burner (3c), as shown in
 Make sure that the type (code and times) you are using is
Fig.3. correct before installing or replacing the control.
 The gas appliance in which the control is installed must
provide adequate protection against the risk of electric
shock (at least IP20).

ELECTRICAL INSTALLATION
 The applicable national and European standards (e.g. EN
60335-1 / EN 50165) regarding electrical safety must be
 respected.
 Live and neutral should be connected correctly; a mistake
Fig.3 could cause a dangerous situation, as the internal and
Regarding the connection of the control units, provisions such external protection and safety devices may be ineffective
as strain relieves, sufficient earth terminals and neutral in case the connection cables of thermostats and valves
terminals should be available in the appliance or in external should lose insulation. Besides, the non-observance of
connection boxes. Fig. 4 and Fig. 5 show the various live-neutral polarity causes a safety shutdown at the end
connection options available with these types of devices. of the safety time.

(4a) 2 WIRES (4b) 3 WIRES (4c) 4 WIRES

LOCKOUT SIGNAL NEON LAMP

Fig.4
4044_r02 3/6
 44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวฒั นา กทม. 10170.
website: https://www.add-furnace.com/ โทร:02-888-3472
Line ID: @add11 Wechat ID: add0883001122

 Before starting the system check the cables carefully; a OPERATION
wrong wiring can damage the control and compromise the At every start the control unit proceeds to a self-checking of
its own components. During the prepurge or waiting time (TW)
 safety of the application.
 The earth terminal of the control, the metal frame of the the internal circuit makes a test of the flame signal amplifier.
burner and the earth on the mains supply must be well Extraneous light or fault in the amplifier leading to flame
simulation prevent the control from starting.
 connected.
 Take great care while connecting the lockout signal and In the types with fan control, before the beginning of the
the reset push-button: a reversed connection can damage prepurge time, the air pressure switch contacts are checked
the control. to prove their "no air flow" state.
 Avoid placing the detection cable close to power or ignition Only if the test is positive is the fan started, and with the air
cables. pressure switch in "air flow" state, the prepurge time begins.
 Use a heat resistant detection probe and cable, well At the end of the waiting or prepurge time, the gas valve VG1
insulated to earth and protected from possible moisture or is energized and the ignition device is operated. In this way,
water in general. the safety time TS begins.
 Use an ignition cable as short and straight as possible and If a flame is detected during the safety time, the ignition
keep it far from other conductors to reduce the emission of device is inhibited and, in some models, the independent
electromagnetic interference (max. length <2m and auxiliary contact or the first valve control switch from "off to
insulation voltage >25kV). "flame-on" position.
In case of live-neutral network with unearthed neutral or live- On the contrary, if the control does not detect any flame signal
live network (with centre of the star not earthed) the control during the safety time, at the end of TS the unit proceeds to
can operate correctly by means of an inbuilt resistor. Anyway, lockout, the gas valve VG1 and the ignition device are
with this type of network it is advisable to use our step-up switched off, while the lockout signal output is supplied.
transformer type AR1. Flame failure during the safety time causes the ignition device
Any leakage between live and earth can reduce the voltage to be re-activated within one second.
on the detection electrode until it causes the lockout of the The attached diagrams are useful to understand how each
control. control operates.
CHECKING AT START-UP
Always check the control before the first start and also after RESETTING THE CONTROL UNIT
any replacements or a long period of non-operation of the Controls with manual reset (non volatile lockout)
system. Before any ignition attempt make sure that the When a control has gone to lockout, in the versions with
combustion chamber is free from gas. Then make sure that: manual reset, an interval of 10 seconds should be allowed
 if the starting attempt occurs without gas supply, the before attempting to reset the control unit; if this time is not
control performs lockout at the end of the safety time; observed, the control may not reset correctly.
 when stopping the gas flow (while the control is in running Controls with electrical reset (volatile lockout)
state), the supply to the gas valve(s) is interrupted within 1 In the versions with volatile lockout, instead, the restart from
second and, after a recycling, the control proceeds to the safety shutdown condition can only be accomplished by
lockout. The control type CE12U NR performs volatile the interruption of the mains supply and it subsequent
restoration.
 lockout within 1 second;
 the operating cycle and timings correspond to the ones These types of burner control units are not provided with
declared for the type of device you are using; independent manual reset function. The application of these
 the level of the flame signal is high enough (see Fig.6 for types of controls is therefore restricted to only those
the measuring test); appliances where resetting by switching off the heat demand
 the ignition probes are adjusted in a stable way for a spark is allowed by European standards.
gap between 2-4 mm; In general, the reset push-button must be placed in sight and
 the intervention of adjusters, limiters or safety devices in close proximity to the appliance. Resetting must occur by
causes a safety shutdown according to the type of means of a conscious manual action and not by means of any
application. automatic devices such as thermostats or timers.
Please note that it is allowed to combine the reset push -
button together with the main switch in the appliance. In this
case, an alarm light will have to be installed too.

Fig.6

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 44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวฒั นา กทม. 10170.
website: https://www.add-furnace.com/ โทร:02-888-3472
Line ID: @add11 Wechat ID: add0883001122

WIRING DIAGRAMS

R R

TYPE CM11U – CE11U TYPE TM11 – TE11 – XM11 – XE11

R R

TYPE CM31U – CE31U TYPE TM31 – TE31 – XM31 – XE31

R
R

TYPE CM12U – CE12U – CE12U NR TYPE TM12 – TE12 – XM12 – XE12

THERMOSTAT FAN AIR PRESSURE FUSE BURNER LOCK-OUT FIRST GAS SECOND SAFETY
SWITCH SIGNAL VALVE GAS VALVE THERMOSTAT
REMARKS:
– The limit thermostat must to be wired in series to the live.
– The reset push-button ® must be connected in the versions with manual reset (non volatile lockout).

4044_r02 5/6
 44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวฒั นา กทม. 10170.
website: https://www.add-furnace.com/ โทร:02-888-3472
Line ID: @add11 Wechat ID: add0883001122

OPERATING CYCLES

1 1 1 1 1 1

TYPE CM11U – CE11U TYPE XM11 – XE11

1 1 1 1 1 1

TYPE CM31U – CE31U TYPE TM31 – TE31 – XM31 – XE31

1 1 1 1 1 1

TYPE CM12U – CE12U TYPE TM12 – TE12 – XM12 – XE12

2 2
TYPE CE12U NR

THERMOSTAT FAN AIR IGNITER FLAME LOCKOUT FIRST GAS SECOND AUXILIARY SAFETY
PRESSURE SIGNAL SIGNAL VALVE GAS VALVE CONTACT THERMOSTAT
SWITCH
REMARKS:
1. In the versions with volatile lockout, the lockout signal is activated during the prepurge or waiting time too.
2. Flame signal loss in running condition causes a volatile lockout.

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