Flame Supervision With Agq3… And Uv Detector Qra...; Ancillary Unit Agq3...; Legend - Siemens LME11 series Manual

Technical data (cont´d)
Flame supervision
with AGQ3... and UV
detector QRA...

Ancillary unit AGQ3...

Legend

Building Technologies
HVAC Products
Mains voltage
Mains frequency
Perm. cable length from QRA... to AGQ3...
(lay separate cable)
Perm. cable length from AGQ3... to LME... max. 2 m
Weight of AGQ3...
Mounting position
Degree of protection
Power consumption
Detector voltage at QRA... (with no load)
Terminal 3 off (refer to control sequence)
Terminal 3 on (refer to control sequence)
Detector voltage
Load by DC measuring instrument Ri > 10 MΩ
Terminal 3 off (refer to control sequence)
Terminal 3 on (refer to control sequence)
DC current detector signals with UV detector
QRA...
Measurement at the UV detector QRA...
In connection with LME... burner controls, use of UV ancillary unit AGQ3... is manda-
tory.
(A) Correct functioning of aged UV cells can be checked as UV test with a higher
supply voltage across the UV cell after controlled shutdown until terminal 3 on.
Connection diagram
LME...
12 2 3
GP/SB
R/W
L
br bl rt
(A)
L
sw
N
QRA...
C Electrolytic capacitor 100...470 µF; DC 10...25 V
Microammeter Ri max. 5,000 Ω
M
QRA... UV detector
GP Gas pressure switch
SB Safety limit thermostat
R Control thermostat or pressurestat
W Limit thermostat or pressure switch
AC 230 V +10 % / -15 %
50...60 Hz ±6 %
max. 20 m
approx. 140 g
optional
IP 40, to be ensured through mounting
4.5 VA
Measuring circuit for measuring the UV
detector current
AGQ3...
1
br
sw
AGQ3...
bl
+
-
Measurement made at the UV detector
QRA...
At mains voltage U
AC 220 V AC 240 V
DC 400 V DC 400 V
DC 300 V DC 300 V
DC 380 V DC 380 V
DC 280 V DC 280 V
Min. required Max. possible
200 µA
bl rt sw
sw bl
bl Blue
br Brown
gr Grey
rt Red
sw Black
N
500 µA
11/23
CC1N7101en
29.06.2006