13
1
1
L2
2
2
L1
3
N N
+
3
2
1
1
3
2
9
10
5
4
3
2
1
1
1
1
5
1
1
5
5
4
4
3
3
2
2
Electrical Connection
- continued -
Wiring diagram for conductivity switch LRS 1-7 (continuous blowdown control)
Operation
CLOSED
OPEN
Actuator EF
e
Conductivity switch with assignment of
M 12 sensor connector (female)
f
Conductivity electrode LRG 16-9 with
assignment of M 12 sensor connector
(male)
g
Connecting line
h
Conductivity electrode ERL 16, LRG 16-4
(without Pt 100)
L2 must remain live after the burner (stand-by operation) is shut down until the continuous blowdown
valve is motored to close. L1 and L2 must be connected to an external conductor of the same phase.
Fig. 4
P1
P2
LRS 1-7
P3
P14
f
j
i
P5 P4 P7A P7B P6
m
k
g
h
i
Current output 4-20 mA, load max. 500 Ω
j
Limit contact MAX
k
S1 Disconnector
l
F1 Fuse (output contact)
F2 Fuse (conductivity switch)
m
Actuator EF
Contacts shown at
Power OFF / limit exceeded
condition
e
l
F1
F2
S1
