User Manual

14/20
Smart Infrastructure CC1N7560en
3/4/2020
Technical data (continued)
With LMV6 at terminal X52.
Warning!
Provide protection to prevent people from coming into contact with the
ionization probe (risk of electric shock)!
Short-circuit current Max. AC 850 µA
Permissible length of flame detector cable
(laid separately)
10 m (100 pF/m), unshielded

Note!
Display on the AZL66 in the event of a short-circuit!
In the event of a short-circuit, a flame signal of 12% is displayed on the AZL66.
At mains voltage
230 V AC
Flame intensity
Detector voltage between ionization probe and ground
(AC voltmeter Ri  10 M)
Approx. 230 V AC ---
Switching threshold (limit values):
Switching on (flame ON) (DC ammeter Ri 5 k)
3 µA 25%
Switching off (flame OFF) (DC ammeter Ri 5 k)
--- 18%
Recommended flame intensity for reliable operation --- > 40%
Switching threshold in the event of poor flame during operation --- Approx. 30%
Possible detector current with flame (typical) > 15 µA 100%
Maximum detector current 60 µA DC ---

Note!
As the detector line capacitance (detector line length) increases, the voltage at the
ionization probe – and thus the detector current – will drop. Long line lengths and very
high-ohmic flames may necessitate the use of a low-capacitance cable. In spite of
special electronic circuits designed to compensate possible adverse effects of the
ignition spark on the ionization current, it is important to ensure that the minimum
detector current required is already available during the ignition phase. If this is not
the case, the primary ignition transformer connections must be interchanged and/or
the electrodes relocated.
Flame supervision with
ionization probe