Dungs DGAI. 69F User manual

1 … 4
Automatic gas burner
control for gas burners
withoutfan,withintermit-
tent ignition burner and
exhaust gas monitoring
DGAI. 69F
1.32
Printed in Germany · Rösler Druck • Edition 06.04 • Nr. 225 755
Technical description
TheDGAI.69Fisanautomaticgasburner
control as per EN 298 with the following
features:
• Ionisation flame monitor
• Ignition flame burns continuously dur-
ing heat request
• Restart attempt in case of flame failure
in operation
• Exhaust gas monitor by means of NTC
sensor
• Program sequence control by means
of electronic timers
• Burner ignition by means of external
ignition facilities
• Ignition gas solenoid valve
• Main gas solenoid valve
• LP gas solenoid valve
• Complete circuit on one PCB
• Connectionsfor operation and faultdis-
play as well as remote unlock facility
• Rast 5 connectivity
Application
The automatic gas burner control
DGAI.69Fissuitableforignitingandmon-
itoring gas burners without blower as per
EN 297 for intermittent operation.
The DGAI.69F operates during heat re-
quest with permanently burning ignition
burner at a heat capacity of
< 250 W and is therefore specially suited
for gas burners whose main flames need
notbemonitored constantlyaccording to
the ionisation principle.
Approvals
EC type test approval as per EC Gas
Appliance Directive:
DGAI.69F CE-0085 AR 0403
ECtypetestapprovalas per ECPressure
Equipment Directive:
DGAI.69F CE0036

2 … 4
Automatic gas burner control
DGAI.69F
The automatic gas burner control
mountedonaPCBoperateswithelec-
tronic timers.
Therefore exact switching times are
ensuredduring voltage andtempera-
ture fluctuations or very short switch-
ing cycles.
The DGAI.69F comprises:
• controller for program flow
• flamemonitoringoperating accord-
ing to the ionisation principle
• exhaust gas monitor and exhaust gas
sensor (NTC resistor) or 1 MΩresistor
instead of exhaust gas sensor.
Functional description
On receipt of a heat request from the
regulator, the LPG pre-valve opens.
After a startup delay period of about
10sduringwhichstartupself-monitor-
ingisperformedinternally,theignition
startsandtheignitiongasvalveopens.
Theignition is switchedoff by theigni-
tionflamesignal, andswitches overto
theso-called stabilisingperiodduring
which the ignition flame must burn
properly.
Functional / circuit diagram DGAI.69F
Wiring diagram DGAI. 69F
AW Exhaust gas switch
AS Exhaust gas sensor
B Operation
FE Remote unlock facility
GDW Gas pressure switch
St 2 External fault
Y1 Ignition gas solenoid valve
Y2 Main gas solenoid valve
ZT Ignition facility
ZE Ignition electrode
IE onisation electrode
LPG LP gas valve
PE-B Burner ground
R Regulator
St Fault
N
L 1
St
6,3 A, tr
~(AC)50 Hz 230 V
Y 2
GDW FE
R
IE
Y 1
LPG
ZE
ZT
AW
BSt 2
AS
162
12
X3
41 34 111 41a
12345678
X1
50 35 36 54 11
12345
NN
67
N
89
N
10
X2
Iftheignitionflamegoesoutwithinthe
stabilising period, the ignition cuts in
again immediately.
After the stabilising period, the main
gasvalveis openedprovided thatthe
flame is present.
Theignition flame remains connected
duringthe complete burneroperation
period.
In the case of flame failure during
operation,themaingasvalveisclosed
within 1 s and a re-ignition attempt is
performed immediately.
Whentheregulatorisswitchedoff,the
LPG,ignitionandmain gas valves are
switched off.
Onreceiptofaflamesignalbeforefuel
release, startup is blocked.
When exhaust gas flows from the flow
protection relay, the equipment
switches off and this is followed by an
exhaust gas delay period.
Exhaust gas switch as per EN 297/
VP100
Aheat sensor(NTC resistor) monitors
the temperature at the draft interrupt-
er. In case of irregular exhaust gas
outlettheexhaustgasmonitorswitch-
esoffat approx.65°C.Afterswitch-off
by the exhaust gas monitor, a timer is
activated. Its time sequence starts
when the exhaust gas sensor cools
down to below 55°C.
Thetimesequenceisapprox.15min.,
theburnerremainsblockedevenafter
the exhaust gas sensor has cooled
downuntilthetime sequence is termi-
nated.
The exhaust gas sensor and its lines
are monitored for interruption. A short
circuit also leads to switch-off in the
same way as excessive temperature.
The DGAI.69F therefore operates only
withtheexhaustgassensorconnected
or an appropriate spare resistor (1Ω).
50 Hz 230 V AC Remote
unlock
facility
Fault lamp
L1 N
FW
FW
ZR
HR
HR
Y 2
Amplifer
FW
ZE
HR
STR
STR
IE
PE
LP-Gas- valve
Regulator
GDW
F1
FW
ZR
Timer
SZA
ZR
Y 1
Gas solenoid valves
Ignition gas Main gas
Heat request signal
N
External operation
N
Ignition
Ignition
burner
Main burner
External fault lamp
N
AW
AW
AS
NTC
Exhaust
gas
switch
X3/1 X3/2 X1/6 X1/3 X1/4
X1/5 X2/3 X1/1 X1/2 X2/2 X2/1 X2/10 X1/7
X2/9 X2/8 X2/5 X2/4 X2/7 X2/6 X1/8

3 … 4
Functional and program sequence
Program sequence periods
Startup delay period (AWZ) approx. 3 s
Stabilising period (STABZ) approx. 5 s
Safety period startup (SZA) < 50 s
Safety period operation (SZB) < 1 s
Fault interlocking period (STVZ) approx. 5 s
Exhaust gas delay periodapprox. 15 min.
The SZB is < 3 s immediately after
main valve release and reduces to
<1 safteranoperationofapprox.30s.
Ionisation flame monitor
Anionisationelectrodeactsasaprobe
intheflame,theburnernozzlenormal-
ly acts as ground.
Ensure that there is proper flame ad-
hesion to the burner.
The burner nozzle must be properly
connected to the opposite pole in the
ionisation current return line.
Under normal power supply condi-
tions, the opposite pole - N - is tied to
ground potential. Connection of
ground and/or protective grounding
terminaltoburnergroundissufficient.
If a buffer transformer is used, it is
absolutely necessary that the burner
groundisconnectedtothepolewhich
is used instead of N. Otherwise the
ionisation current has no return line.
The situation may occur that, despite
a proper flame and proper arrange-
ment of the electrode, no or only a
weak ionisation current can flow.
Fault unlocking facility
In case of fault, the DGAI.65F is un-
locked by means of an external con-
tact.
Fuses
An internal fuse (4 A) protects the
equipment from an output-side short
circuit.Thefusescannotbereplaced.
For this reason, only DUNGS person-
nel may check and repair the auto-
matic burner control.
External backup of the automatic gas
burner control by means of a 6.3 A
slow-blow and/or 10 A quick-acting
back-up fuse.
Refer to the permitted
switching capacities.
If a fuse is defective, check the
safety function of the monitoring
device,otherwise the contactmay
be welded by a short circuit.
If you do not observe these
installation and operating
instructions, it may result in per-
sonal injury or material damage.
Forthisreason,strictlykeeptothe
instructions. The warranty for the
equipment will expire on any at-
tempt to access the electronic cir-
cuits, i.e. automatically when the
seal is broken.
Exhaust gas
delay period
STABZ
Exhaust gas temperature
Ignition
Ignition valve Y1
Flame signal
Fault interlock
Startup after regulator circuit, without flame formation
Restart after flame failure during operation
LP gas valve
Main gas valve Y2
Ignition
Ignition valve Y1
Flame signal
Fault interlock
LP gas valve
Main gas valve Y2
Ignition
Ignition valve Y1
Flame signal
Fault interlock
LP gas valve
Main gas valve Y2
Ignition
Ignition valve Y1
Flame signal
Fault interlock
LP gas valve
Main gas valve Y2
Exhaust gas temperature
Exhaust gas temperature
Exhaust gas temperature
SZB
Startup after regulator circuit, with flame formation
Regulator, gas switch
Switch-off via exhaust gas temperature followed by startup
Regulator, gas switch
Regulator, gas switch
Regulator, gas switch
15 min
SZA STVZ
AWZ
The material of the ionisation elec-
trodeandtheinsulationmustbe heat-
resistant.AprovenmaterialisKanthal
for electrodes and a ceramic insula-
tion made of aluminium oxide. The
insulation resistance should be more
than 50 MΩ.
Measuring the monitor current
The intensity of the ionisation current
can be measured by means of a DC
micro-ammeter. The current intensity
should not undershoot 6 µA during
operation. The maximum reachable
ionisation current is approx. 50 µA.
Faultshut-downtakesplacewhenthe
ionisationcurrentundershootsapprox.
1 µA.
For measurement purposes, the mi-
cro-ammeteris switched between the
ionisation electrode and the connec-
tion plug.
Installation and operating instruc-
tions
Installation
Theautomatic gas burnercontrolcan
be installed in any position.
Electrical connection
Wiringhastobe performed in compli-
ance with the local prevailing regula-
tions and the wiring diagram.
Startup
Beforestartup,checkwhetherallcon-
nections are correct.
Check the following safety functions
during startup:
1. Switch off regulators, switches and
limiters.
2. Refertogaspressure switch switch-
ing points
3. Flame detector
Interrupt ionisation line and/or per-
form a short circuit between elec-
trode and ground.
4. Test: Switch-off via exhaust gas
temperature
The effects of leak search
sprayandsimilarsubstanc-
es may cause dangerous flame-
simulating conditions on ionisa-
tion electrodes and conductors,
e.g. ionisation ammeters.
Therefore please handle leak
search sprays and similar sub-
stanceswithextremecaresothat
they are only applied to the leak
test points.
Ifitisnotpossibleto limittheuse
of these substances, ionisation
electrodes and conductors must
be protected before applying the
substances. It is not sufficient to
merely wipe off the leak search
spraysubstanceafterapplication.
Test equipment connection
IE
100 µF
= 0…100 µA
Ionisation
+-
DGAI.69F

4 … 4
Dimensions Specifications
Nominal voltage 230 V AC - 15 % to 240 V AC + 6 %
Frequency 50 Hz
Performance rating approx. 5 VA
Internal fuse (not replaceable)
Back-up fuse max. 6 A slow-blow or 10 A quick-acting
Switching capacity:
Fault signal max. 1 A (with external fault
signal)
Ignition max. 1 A
Ignition gas valve max. 1 A
Main gas valve max. 1 A (with operating signal)
LP gas valve max. 1 A
Total switching capacity max. 2 A
Flame detector lonisation
Ionisation current / operation 6 - 10 µA
Switch-off sensitivity <1 µA (≥0.5 µA)
Short-circuit current limitation approx. 100 µA
Unlock facility Remote unlock
Degree of protection IP 20 - IP 40 must be
ensured by installation
Ambient temperature 0 to 60 °C
Connectivity Rast 5, encoded
Protective grounding terminal Separate protective ground conduc
tor
Weight 0.35 kg
Exhaust gas sensor Notcontained in scopeofsupply
Nominal resistance at 25 °C approx. 1 MΩ
Switch-off resistance at 65 °C approx. 150 kΩ
Switch-on resistance at 55 °C approx. 230 kΩ
Ignition External ignition source
Order data Type Order No.
Automatic gas burner control DGAI. 69F as per spec.
Connectors Notcontainedinscopeofsupply.
Connection can only be per-
formedusingRAST5connectors,
row 36... encoded.
Manufacturer: Lumberg GmbH & Co.
D-58569 Schalksmühle
Automatic gas burner control for
gasburnerwithoutfan,withignition
burnerintermittentandexhaustgas
monitoring
DGAI. 69F
We reserve the right to make any changes in the interest of technical progress.
127
78 48
X 2
140
106,2
14,2
4,2Ø
X 1
Heat request
signal
AW
39
129
46,5
DGAI. 69F Connector table
Function Slot Pole Coding
no. no. Plug no.
Supply line/power supply 41 02 ....1) 02 K04
LPG-pre-valve 34 02 ....1) 02 K16
Gas pressure switch 111 02 ....1) 02 K05
Fault/unlock 50 03 ....1) 03 K04
Fault/operation 41a 02 ....1) 02 K06
Exhaust gas sensor 162 02 ....1) 02 K44
Ignition 54 02 ....1) 02 K03
Gas valve 1 35 02 ....1) 02 K16
Gas valve 2 36 02 ....1) 02 K16
Ionisation 11 01 Flat-type plug
6.3 x 0.8 mm
1) IPCD terminal 3623... / Screw terminal 3611...
Head Offices and Factory
Karl Dungs GmbH & Co. KG
Siemensstraße 6-10
D-73660 Urbach, Germany
Telephone [phone]
Fax [phone]
Postal address
Karl Dungs GmbH & Co. KG
Postfach 12 29
D-73602 Schorndorf, Germany
e-mail [email protected]
Internet www.dungs.com