Fotocelda Siemens
Fotocelda Siemens
Fotocelda Siemens
The QRI... and this Data Sheet are intended for use by OEMs which integrate the
flame detectors in their products.
Use, features
CC1N7719en
Building Technologies
02.06.2008 HVAC Products
Warning notes
Mounting notes
• Ensure that the relevant national safety regulations are complied with
• Secure the flame detector to the burner with the clamp and flange provided. With
the clamp’s fixing screw loosened, the detector can be correctly adjusted toward
the flame. This adjustment can be checked by watching the intensity of the flame
signal on the AZL5... display and operating unit of the LMV5... burner control, or
with the help of the measuring circuit (refer to «Detector signal measurement»)
• Ensure that the connection between the metal surface of the flange and the
burner’s earthed housing is electrically conductive
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• Locate the detector such that, if possible, only the flickering peripheral range of the
flame will be detected. The view at hot boiler walls or other hot boiler or burner
components must be restricted as much as possible. This can be attained by
clearly confined viewing conditions behind narrow baffle plates. If this is not possi-
ble, a viewing tube should be used to restrict the viewing range to a smaller area of
the flame. Length, diameter and alignment of the viewing tube must be determined
through testing, depending on the size of burner and boiler
Commissioning notes
• When commissioning the plant or when doing maintenance work, make the follow-
ing safety checks:
• Make a loss-of-flame test with the AZL5... of the LMV5... burner control
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For use in the U.S. / Canada, the flame detectors carry the marks.
Service notes
• To clean the detector’s lens, use a soft, clean cloth (free from oil and solvents)
Disposal notes
The flame detector contains electrical and electronic components and must not be dis-
posed of together with domestic waste.
Local and currently valid legislation must be observed.
Mechanical design
The QRI... has an impact-proof housing made of black plastic. The lens is fitted in a
dust-tight position.
The QRI... can be secured to the burner within its adjusting range, using the clamp and
the flange provided.
The 3-core connecting cable is ready connected to the QRI... and features cable strain
relief.
Depending on the type of burner construction, there are flame detectors for frontal or
lateral illumination available.
Type summary
When ordering, please give the complete type reference according to «Type sum-
mary».
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Technical data
General detector data Operating voltage
- Operation DC 14 V ±5 %
- Test DC 21 V ±5 %
Signal voltage DC 0...5 V
Length of connecting cable Max. 180 cm
Degree of protection IP54
Power consumption < 0.5 W
Length of auxiliary detector cable Max. 100 m
Safety class II
Vibrations to IEC 6068-2-6 max. 1 g / 10...500 Hz
Weight incl. cable 180 cm approx. 0.175 kg
Mounting position optional
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With this type of flame supervision, the changes in infrared radiation are used to gener-
ate the flame signal. The flame-detecting element is an infrared-sensitive photoresistor
whose spectral sensitivity covers the range of approximately 1...3 µm. The detector
does not respond to constant radiation or radiation with mains frequency harmonics
(e.g. 50 Hz or multiples thereof). The suppression of these radiation frequencies is
made electronically, directly dependent on the current mains frequency at which the
relevant burner control (e.g. LMV5...) is operated. As a result, filtering takes place
within a very narrow band, which means that the signal generated by the flame can
almost completely be utilized since the frequency and the rate of change of infrared
radiation constantly change. Hence, the detector’s ability to capture the flame’s radia-
tion behind the burner’s baffle plate is extremely high. As a result of the high level of
sensitivity, constant or mains frequency-harmonic extraneous light sources remain
undetected only if the detector itself is not moved. Due to its short-wave spectrum, the
ignition spark will not be detected. The detector’s analog output signal (0... approx. +5
V) is a measure of the changes of the flame’s radiation intensity.
Maximum If the connecting cable length of 180 cm is not sufficient, the burner manufacturer can
detector cable extend it up to a maximum of 100 m (also refer to «Installation notes»).
length
sw
SIEMENS bl
Landis & Staefa
QRI
Made in Germany
br
7719m04/1199
max. 1,8 m Z < 100 m
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7719d01e/0700
a
2
b
c
1
b
d d
0
0 1 2 3 4 5
Wave length (µm)
10 %
1%
1 1.5 2 2.5 3 3.5 4
Wave length (µm)
7/11
7719a01/0500 +
0...10 V
Ri > 10 M
Measurement of the detector’s signal with a Voltmeter is not normally required since
the flame signal’s intensity is shown on the AZL5... display and operating unit.
Drawing of disposition
Clamp
Adapter sleeve
Adapter nipple
(heat insulator)
7719z01e/0302
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Dimensions in mm
QRI2B...
for lateral illumination
144,5
40 69 22
12 18
56
SIEMENS
Landis & Staefa
55,7
QRI
Made in Germany
7719m02/0603
156 L
QRI2A...
for frontal illumination
40 144,5 22
69 18
56
55,7
7719m08/0603
6,8
162,8 L
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Brown Blue
7+- 0,5
Black
40 +- 1
7719m01e/0302
3/4"-14NPSM
34
7719m07/0302
AGG2.120
1/2"-14NPSM
5
6,
Pg9
7719m06/0302
SW24 7,5
28,5
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R4
7
25°
30
15
3
7719m09e/0608
Company logo to 3 10 24
LN 3 8380 0102
0,2 mm elevated 48
4 241 88550
36
24,
3
R2 R4
7
R0,3
R2
30
25°
15
3
7719m10e/0608
Company logo to 3 10 18
LN 3 8380 0102
0,2 mm elevated 24
48
11/11