Unigas R91, Installation Manual

Page: 44 / 120

SIEMENS LFE10/LAE10 FLAME DETECTOR
The LFE10 is suited for the supervision of gas flames and luminous or
blue-burning oil flames in connection with UV detectors QRA... or a flame
rectification probe.
The
LAE10 is designed for the supervision of oil flames in connection with
selenium photocell detectors RAR...
Technical data
Mains voltage: AC 220 V -15 %...AC 240 V +10 %
AC 100 V -15 %...AC 110 V +10 %
Mains frequency: 50...60 Hz ±6 %
Prefuse (external) max. 10 A (slow)
Power consumption 4.5 VA
Max. contact rating 2 A
Degree of protection IP 40,
provided cable entry is in compliance with
IP 40
Temperature range -20...+60 °C
Humidity < 95 % r.h.
Condensation, formation of ice and ingress
of water are not permitted!
Basic circuit diagrams
LFE and eletcrode
LFE andQRA
LAE and RAR
Keys
FE Detector electrode for flame rectification
FR Flame relay
H Main isolator
HR3 Auxiliary relay for UV detector or flame simulation test
L1 Built-in signal lamp - Indication of flame
QRA... UV detector
RAR... Selenium photocell detector
KROM-SCHROEDER IFW15 FLAME DETECTOR
z
For flame detection
z
For multi-flame control for intermittent
z
operation in conjunction with the
z
flame control units IFS
z
Ionisation or UV control
z
Potential-free change-over contacts
z
Integrated flame control signal
APPLICATION
For the detection and signalling of the presence of a flame by means of
ionisation or UV control. The flame detector is intended for use in conjun-
ction with the flame control units IFS 110 IM, IFS 111 IM, IFS 410 or IFS
414. It can also be used where there is no fully automatic control required.
FEATURES
- Flame control with ionisation electrode or UV probe
- For intermittent operation
- Potential-free contacts for flame detection (1 normally closed, 1 normally
open)
Function
The flame detector is ready for operation as soon as the mains voltage is
applied to it. When the flame is established, the d.c. current energises a
relay. The contacts of this relay can be used for control functions accor-
ding to the application.
In a
multi-flame control system (Fig. 2), several burners may be control-
led at the same time. A flame control unit (e.g. IFS 110 IM) is used for the
entire control functions and this also controls the first burner (only in the
case of ionisation control). All remaining burners of this group are each
controlled by an IFW 15 flame detector.
Should the flame controlled by a flame detector be extinguished during
operation, the flame signal to the control unit is interrupted and an emer-
gency cut-off occurs. This also occurs if a flame is simulated prior to igni-
tion.
Technical data
Mains voltage:
IFW 15: 220/240 VAC -15/+10%, 50/60 Hz for earthed mains
IFW 15T: 110/120 VAC -15/+10%, 50/60 Hz or
220/240 VAC -15/+10%, 50/60 Hz for earthed or non-earthed mains
Consumption: 12 VA
Output voltage for ionisation electrode: 230 VAC
APPENDIX
P(R)
H
10
13
3
7
hr3
2 4
N(Mp)
14 LEC1
6 1 5
HR3
9
FR
L1
8
7781a06/0199
FE
P(R)
H
6 1 5 7
15 LEC1
10
13
3
hr3
2
4
N(Mp)
14 LEC1
HR3
8
9
FR
L1
QRA...
+
7781a05/0199
Terminal 10 must be connected to earth!
P(R)
H
6 1 5 7
15 LEC1
10
13
3
hr3
2
N(Mp)
14 LEC1
HR3
8
9
4
FR
L1
+
RAR...
7781a04/1198