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Application examples
The suitable wiring schemes are merely examples which must be verified in the individual case depending on
application!
Control of actuators of 2-stage or 2-stage modulating burn-
ers. Controlled prepurging «t1» with nominal load air volume.
For information about actuators «SA»:
SQN3...: Refer to Data Sheet N7808
SQN7...: Refer to Data Sheet N7804
SQN9...: Refer to Data Sheet N7806
LME22...
2
3
12
10
8
EK2
GP
AL
R/W
M
SB
N
1
8
2
7
HS
R3
0
I
Si
b1
B
N
L
A
a1
M
I
II
SQN3...151... or SQN3...251...
* Note
With 2-stage modulating burners (with gas regulation
damper «RV»), «BV2» and the dotted connection be-
tween terminals (*) are not required.
LME22...
12
2
10
8
3
6
R/W
LP
EK2
GP/SB
AL
M
N
4
1
5
HS
0
I
Si
a1
N
L
b1
C
A
SQN7...454 / 2-stage control
1 wire control
20/23
Building Technologies
HVAC Products
6
11
9
5
4
1
7
ION
Z
LP
S1)
BV1
LR
*
*
BV2
4
9
5
6
3
2)
LKP
b2
a2
LK
III
V
1)
5
RV
7
11
5
9
4
1
ION
Z
LR
BV1
BV2
3
2
8
6
7
b2
c1
LKP
NL
a2
KL
B
M
zu
I
II
III
IV
L
LME22...
R/W
GP/SB
HS
0 I
Si
N L
t4
TSA
t1
NL
I
KL
III
III
Zu
t
II
HS
0
I
N
I
I
IV
IV
III
III
t
II
t1
TSA
t4
12
5
9
4
7101a13/0804
LR
SA
SB/R/W
6
12
2
10
8
3
11
9
EK2
LP
AL
M
2
1
3
6
8
10
R3
R1
K2
K1
C2
+
D
III
C3
-
+
R2
I
MS
C1
SA
SQN90.220... / 2-stage modulating control
LME22...
2
12
10
8
3
6
11
9
R/W
LP
EK2
GP/SB
AL
M
N
4
5
1
3
Si
a1
L
b1
A
M
I
II
SQN7...424 / 2-stage control
2 wire control
RV
BV2
BV1
4
1
5
7
ION
LR Z
BV1
7
9
RV
II
LK
5
7
4
1
Z
ION
LR
1
2
BV1
BV2
2
8
6
7
b2
a2
B
III
IV
CC1N7101en
29.06.2006
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