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Building Technologies
CC1N7719en
17.07.2018
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!
·
All activities (mounting, installation and service work etc.) must be performed by
qualified staff. If not observed, there is a risk of impairment of safety functions and
of electric shock hazard
·
Before carrying out any work on the flame detector, isolate the power supply
completely (all-polar disconnection). Ensure that the plant cannot be inadvertently
switched on again and that it is indeed isolated.
If not observed, there is a risk of electric shock hazard
·
Ensure protection against electric shock hazard by providing adequate protection
for the burner control’s connection terminals. If not observed, there will be a risk of
electric shock
·
Each time work has been carried out (mounting, installation, service work, etc.),
check to ensure that wiring is in an orderly state and that the correct terminals of
the LMV5... are used and make the safety checks as described in
Commissioning
notes.
If not observed, there is a risk of impairment of safety functions and of
electric shock hazard
·
Make certain that none of the 3 connecting wires of the QRI... is connected to
terminal X10-02 pin 3 (mains voltage
L
)! Risk of damage to QRI... and LMV5...!
·
Due to its mounting location behind the baffle plate, the flame detector has high
signal sensitivity and, therefore, identifies small variations in infrared radiation as a
flame. For this reason, make certain that so-called heat streaks after loss of flame
(emitted for example by after-glowing combustion chamber lining) will not reach the
detector as these would simulate a flame. Air turbulence or similar may modulate
infrared radiation emitted by hot boiler or burner components in a way that a flame
will be simulated. Likewise, moving parts in the detector’s viewing range can cause
infrared radiation from the boiler (or a viewing tube) to be modulated, thereby
possibly generating sporadic detector signals. Strong burner or detector vibrations
can also produce variations in radiation. For this reason, the burner or boiler
manufacturer must make certain that such modulated radiation cannot reach the
flame detector. For example, loose cables (moving up and down in the fan’s
airstream) are not permitted within the detector’s viewing range. If this is not
observed, there is a risk of loss of safety functions
·
Consider carefully the use of infrared flame supervision if several burners use the
same combustion chamber (if this is not observed, there is a risk of loss of safety
functions). In general, this type of flame supervision is not suited for the specific
supervision of individual burners
·
Check to ensure that the burner will initiate lockout when – while the burner is
running – the flame detector is removed from its fixing on the burner and – without
moving it – is exposed to room lighting
·
Fall or shock can adversely affect the safety functions. Such units must not be put
into operation even if they do not exhibit any damage
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 (see
Detector signal measurement
)
·
Ensure that the connection between the metal surface of the flange and the
burner’s earthed housing is electrically conductive
