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Automatic gas burnercontrol for gas burnerswithout fan, with intermit-tent ignition burner andexhaust gas monitoring
DGAI. 69F
1.32
P r i n t e d
i n
G
e r m
a n y
· R
ö s l e r D r u c k
•
E d
i t i o n
0 6 . 0 4
•
N r . 2 2 5
7 5 5
Technical description
The D G A I.69F is an autom atic g as burner
control as p er EN 298 w ith the follow ing
features:
•Ionisation flam e m onitor
•Ignition flam e b urns continuously dur-
ing heat req uest
•Restart attem pt in case of flam e failure
in operation
•Exhaust gas m onitor by m eans of N TC
sensor
•Program sequence control by m eans
of electronic tim ers
•Burner ignition by m eans of external
ignition facilities
•Ignition gas solenoid valve
•M ain g as solenoid valve
•LP gas solenoid valve
•C om plete circuit on one P C B
•Connections for operation and fault dis-
play as w ell as rem ote unlock facility
•Rast 5 connectivity
Application
Th e a utom atic g as b urne r co ntrol
D G A I.69F is suitable for igniting and m on-
itoring gas burners w ithout blow er as per
EN 297 for interm ittent operation.
The D G A I.69F operates d uring heat re-
quest w ith perm anently burning ignition
burner at a heat capacity of
< 250 W and is therefore sp ecially suited
for gas b urners w hose m ain flam es need
not be m onitored constantly according to
the ionisation principle.
Approvals
EC type test ap proval as per EC G as
A ppliance D irective:
D G AI.69F C E-0085 A R 0403
EC type test ap proval as p er EC Pressure
Equipm ent D irective:
D G A I.69F C E0036
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Automatic gas burner controlDGAI.69FThe autom atic g as b urner control
m ounted on a PC B operates w ith elec-
tronic tim ers.
Therefore exact sw itching tim es are
ensured during voltag e and tem pera-
ture fluctuations or very short sw itch-
ing cycles.
The D G A I.69F com prises:
•controller for program flow
•flam e m onitoring op erating accord-
ing to the ionisation principle
•exhaust gas m onitor and exhaust gas
sensor (N TC resistor) or 1 M Ω resistor
instead of exhaust gas sensor.
Functional descriptionO n receipt of a heat req uest from the
regulator, the LP G pre-valve opens.
A fter a startup delay p eriod of ab out
10 s during w hich startup self-m onitor-
ing is p erform ed internally, the ignitionstarts and the ignition gas valve opens.
The ignition is sw itched off by the igni-
tion flam e signal, and sw itches over to
the so-called stabilising period during
w hich the ignition flam e m ust burn
properly.
Functional / circuit diagram DGAI.69F
Wiring diagram DGAI. 69F
A W Exhaust gas sw itch
A S Exhaust gas sensor
B O peration
FE Rem ote unlock facility
G D W G as p ressure sw itch
St 2 External fault
Y1 Ignition gas solenoid valve
Y 2 M ain g as solenoid valve
ZT Ignition facility
ZE Ignition electrode
IE onisation electrode
LPG LP gas valve
P E-B B urner g round
R R egulator
St Fault
N
L 1
St 6 , 3
A ,
t r
~ ( A C ) 5 0 H z 2 3 0 V
Y 2GDW FE
R
IE
Y 1LPG
ZE
ZT
AW
BSt 2
AS
162
1 2
X3
41 34 111 41a
1 2 3 4 5 6 7 8
X1
50 35 36 54 11
1 2 3 4 5
N N
6 7
N
8 9
N
10
X2
If the ignition flam e goes out w ithin the
stabilising period, the ignition cuts in
ag ain im m ediately.
A fter the stabilising period, the m ain
gas valve is opened provided that the
flam e is present.
The ignition flam e rem ains connected
during the com plete burner op eration
period .
In the case of flam e failure during
op eration, the m ain gas valve is closed
w ithin 1 s and a re-ignition attem pt is
perform ed im m ed iately.
W hen the regulator is sw itched off, the
LP G , ignition and m ain g as valves are
sw itched off.
O n receipt of a flam e signal before fuel
release, startup is b locked.
W hen exhaust gas flow s from the flow
p rotection relay, the e q uip m ent
sw itches off and this is follow ed by anexhaust gas d elay p eriod .
Exhaust gas switch as per EN 297/VP100A heat sensor (N TC resistor) m onitors
the tem perature at the draft interrupt-
er. In case of irregular exhaust gas
outlet the exhaust gas m onitor sw itch-
es off at approx. 65°C . A fter sw itch-off
by the exhaust gas m onitor, a tim er is
activated. Its tim e sequence starts
w hen the exhaust gas sensor cools
dow n to below 55°C .
The tim e sequence is approx. 15 m in.,
the burner rem ains blocked even after
the exhaust gas sensor has cooled
dow n until the tim e sequence is term i-
nated.
The exhaust gas sensor and its lines
are m onitored for interruption. A short
circuit also leads to sw itch-off in the
sam e w ay as excessive tem perature.
The D G AI.69F therefore operates only
w ith the exhaust gas sensor connected
or an appropriate spare resistor (1Ω).
50 Hz 230 V ACRemoteunlock
facility
F a u l t l a m p
L1 N
FW
FWZRHR
HR
Y 2
AmpliferFW
Z E
HRSTR
STR
I E
PE L P - G a s -
v a l v e
Regulator
GDW
F1
FW
ZRTimerSZA
ZR
Y 1
Gas solenoid valvesIgnition gas Main gas
H e a t r e q u e s t s i g n a l
N E x t e r n a l o p e r a t i o n
N
Ignition
Ignitionburner
Main burner
E x t e r n a l f a u l t l a m p
N
AW
AW
ASNTC
Exhaust
gasswitch
X3/1 X3/2 X1/6 X1/3 X1/4X1/5 X2/3 X1/1 X1/2 X2/2 X2/1 X2/10 X1/7X2/9 X2/8 X2/5 X2/4 X2/7 X2/6 X1/8
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