Siemens QRB Series Bedienungsanleitung

Landis & Staefa Division CC1N7714E June 14, 1999 1/4

7714

Photoresistive Detectors QRB...

QRB1...A with large flange QRB1...A with small flange QRB1...B QRB3...

and clamp and clamp with plug with flange and clamp

Photoresistive flame detectors for use with Landis & Staefa burner controls,

for the supervision of oil flames in the visible light spectrum.

The flame detectors are used primarily in connection with burner controls for

small burners.

The QRB... and this data sheet are intended for use by OEMs which integrate

the flame detectors in their products.

The QRB... are designed for the supervision of yellow-burning oil flames.

Photoresistive detector For use with burner controls type

QRB... LAL..., LOA...

For QRC... blue-flame detectors, refer to data sheet 7716.

Compact photoresistive detector with infused two-wire thermoplastic cable.

The flame detector is available with normal or high sensitivity and with or without

flange / clamp or soft plastic plug (refer to «Type summary»).

Flame detector without soft plastic plug.

This type of detector is fitted with the help of a securing flange.

A guide groove in the securing flange and a cam on the detector clamp ensure

vibration-free mounting and make certain that the detector is always correctly sited

towards the flame.

•Securing flange with 22 mm spacing for use with

the QRB1...1

•Securing flange with 36 mm spacing for use with

the QRB1...2

•Clamp

Flame detector with soft plastic plug.

For mounting this type of detector on the burner, all that is required is a hole with a

lateral groove (refer to «Dimensions»).

The sealing and securing ribs of the soft plastic plug hold the detector firmly in the

hole.

The guide guarantees correct alignment of the photoresistive element with the flame.

The detector is supplied with a protective tube of 17 mm diameter.

This type of detector is always secured with a flange and a clamp (refer to

«Accessories»).

ISO 9001

Use

Mechanical design

QRB1...A

Accessories

QRB1...B

QRB3...

2/4 CC1N7714E June 14, 1999 Landis & Staefa Division

To avoid injury to persons, damage to property or the environment, the

following warning notes should be observed!

It is not permitted to open, interfere with or modify the flame detector!

• Before performing any wiring changes in the connection area of the QRB..., the

burner control must be completely isolated from the mains supply!

• Ensure protection against electric shock hazard on the detector itself and on all

electrical connections through appropriate mounting!

• Check the wiring and all safety functions!

• Installation and commissioning work may only be carried out by qualified staff!

• Observe the permissible length of the detector cable!

→Refer to «Technical data»

• Always run the detector cable separate from other cables, especially from the

ignition cable, while observing the greatest possible distances!

• The relevant national safety regulations must be complied with!

• The detector should not be subjected to mechanical shocks!

The intensity of the radiation of light on site is checked by measuring the detector

current.

Legend

A Incidence of light

M DC microammeter (internal

resistance

max. 5000

Ω

)

For the minimum detector current values required, refer to the data sheet of the

respective burner control.

Do not use any burner cleansing sprays.

When cleaning the photoresistive detector, always use a clean cloth.

Warning notes

Installation notes

Commissioning notes

Measurement circuit

QRB... M-+12 11 LOA...

22 23 LAL2/3...

23 22 LAL1...

7714d01/0599

Service notes

Landis & Staefa Division CC1N7714E June 14, 1999 3/4

I* (cm) 18 / 20 28 / 30 28 / 30 33 / 35 48 / 50 48 / 50 58 / 60 68 / 70 78 / 80 148 /

150

m(mm) 40 25 40 40 40 70 25 70 70 70

* With plug / without plug

Type

reference Flange Clamp Feature Sensitivity

QRB3 Without Without Protection pocket Normal

QRB3(1) With With Protection pocket Normal

QRB3S Without Without Protection pocket High

QRB3S(1) With With Protection pocket High

Item For use with Part number ¹)

Flange with 21 mm spacing QRB1... 4 241 1462 0

Flange with 36 mm spacing QRB1... 4 241 1600 0

Clamp QRB1... 4 186 1096 0

Flange QRB3... 4 286 1490 0

Clamp QRB3... 4 186 8806 0

¹) When ordering individual items:

Items are supplied together with the flame detector, depending on the type of detector

(refer to «Type summary»).

When ordering, please give type reference according to «Type summary».

The QRB1... with plug is always supplied without flange / clamp, and vice versa.

QRB1...: normal sensitivity

standard casing length 50 mm

visible cable length 200 mm

stripped length 40 mm

with terminating sleeves

without plug

without flange / clamp QRB1A-A020B40A

QRB1...: as above

but with a small flange / clamp QRB1A-A020B40A1

Type summary

QRB1... QR B 1 A- A 0 3 5 B 4 0 B _

Accessory

1: small flange/ clamp

2: largeflange/ clamp

Plug

A: without plug

B: withplug

Strippedlength"

" inmm

End of cable

A: unstripped

B: withterminatingsleeves

Visibl e cable length "

" in cm

Type of casing

A: standard casing length "

" =50 cm

B: standard casing length "

" =65 cm

Sensitivity

A: normal (colour ofcasing: black)

B: high (colour of casing: red)

Available dimensions

QRB3...

Accessories

Ordering

Example

4/4 CC1N7714E June 14, 1999 Landis & Staefa Division

Environmental conditions Degree of protection IP 40

Transport IEC 721-3-2 Mounting orientation optional

Climatic conditions class 2K2

Temperature range -20...+60 °C Cable length for detectors used

Humidity < 95 % r.h. in connection with LOA... / LAL... max. 1.5 m

Mechanical conditions class 2M2

Operation IEC 721-3-3 Detector cable 2 x 0.75 mm²; 5.1 mm dia.

Climatic conditions class 3K5

Temperature range -20...+60 °C Weight

Humidity < 95 % r.h. - QRB1... (depending on type) 20...35 g

Condensation, formation of ice and - QRB3... (without cable) approx. 35 g

ingress of water are not permitted!

With this type of flame supervision, the radiation of oil flames in the visible light

spectrum is used for generating the flame signal.

The light-sensitive element is a photoresistor.

When there is no light, the detector's resistance is in the MΩrange.

Its resistance drops as the intensity of illumination increases (kΩrange).

In contrast to the selenium photocell of the RAR... detectors, glowing firebrick in the

combustion chamber can be detected.

Dimensions in mm

Technical data

Function

Dimensions

3,6

4 241 1462 0

8,8

4 186 1096 0

4,6

4 241 1600 0

13,5

8,8

4,6

4 286 1490 0

4 186 8806 0

10 QRB3...

7714m04/0499

14,2

15,6

QRB1...A

QRB1...B

QRB3...

1999 Landis & Staefa Produktion Deutschland

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