User Manual

ManualsBrandsSiemens ManualsBurner EquipmentFlame detector QRA4.U

CC1N7711en

05.03.2018

Building Technologies

711

Flame detector

QRA4…

UV flame detector for use with burner controls from Siemens for the supervision

of gas or oil flames.

The QRA4... and this Data Sheet are intended for use by OEMs which integrate

the flame detectors in their products.

Use

The flame detector is used for the supervision of gas flames, yellow- or blue-burning oil

flames and for ignition spark proving in intermittent operation.

The QRA4... is for use with the following types of burner control:

QRA4.U QRA4M.U Burner control Data Sheet

● --- LFL... N7451

● --- LFE1... N7461

● --- LFE10... N7781

● ● LFS1 N7782

● --- LGB2... / LGB4... with AGQ1... N7435

● --- LME21...C2 / LME22...C2 with AGQ3... N7101

● --- LME39...C2 with AGQ3... N7106

● --- LME41...C2 / LME44...C2 with AGQ3... N7101

● --- LME7... N7105

● ● LMV26.300... with AGM60.1... N7547

● ● LMV27.100… N7541

● ● LMV36.520... with AGM60.4... N7544

● ● LMV37.4… N7546

● --- LMV5... with AGQ1... N7550

Other burner controls on request.

Summary of content (6 pages)

PAGE 1
7 711 QRA4… Flame detector UV flame detector for use with burner controls from Siemens for the supervision of gas or oil flames. The QRA4... and this Data Sheet are intended for use by OEMs which integrate the flame detectors in their products. Use The flame detector is used for the supervision of gas flames, yellow- or blue-burning oil flames and for ignition spark proving in intermittent operation. The QRA4... is for use with the following types of burner control: QRA4.U QRA4M.
PAGE 2
Warning notes To avoid injury to persons, damage to property or the environment, the following warning notes must be observed! Do not open, interfere with or modify the flame detector! Siemens will not assume responsibility for damage resulting from unauthorized interference!     All activities (mounting, installation and service work, etc.
PAGE 3
Commissioning notes Trouble-free burner operation is ensured only when the intensity of UV radiation at the detector’s location is high enough for the detector’s UV cell to ignite during each half wave. The intensity of UV radiation at the detector’s location is checked by measuring the detector current (refer to Data Sheet of the respective burner control) Measuring circuit for QRA4... White Red Legend 1) Connection of microammeter across adapter AGQ1... / AGQ2... / AGQ3...
PAGE 4
Mechanical design Flame detector QRA4... UV flame detector for frontal illumination. Housing made of aluminum, with ¾“-14NPSM connecting thread for fitting the detector to the burner or boiler. Connecting wires of about 1.8 m length for the electrical connection. ½“-14NPSM thread for a fitting, required for the connection of a Menzel tube for protecting the connecting wires (½“ conduit). Ordering Article no. Type Sensitivity BPZ:QRA4.U QRA4.U Normal BPZ:QRA4M.U QRA4M.
PAGE 5
Technical data General detector data Environmental conditions Average life of UV cell Perm. combustion chamber pressure Degree of protection Mounting position Weight Approx. 10,000 hours at max. +50 °C, higher ambient temperatures reduce considerably the cell’s life Max. 150 mbar IP54 (to be ensured through mounting) Optional Approx. 180 g Device safety class II (double-insulated) Length of connecting wires - QRA4... - AGG02 - AGG04 - AGG15 Conduit for protective sleeve (Menzel sleeve) Approx.
PAGE 6
Dimensions Dimensions in mm O 35 O 30.5 Flame detector QRA4... 7711m03e/1210 19 108 Thread 3/4”-14NPSM Thread 1/2”-14NPSM M1:1 Heat insulation glass AGG02 69.9±0.5 SW 36 Pipe thread ISO228/1-G1 3/4"-14NPSM Mounting coupling AGG04 7711m02e/1010 3/8” cooling air supply SW21 2018 Siemens AG Building Technologies, Berliner Ring 23, D-76437 Rastatt Subject to change! 6/6 Building Technologies CC1N7711en 05.03.