Landis & Staefa Division
CC1N7421E
December 04, 1998
11/16
Connection diagram
LMG22...
Application examples
Control of actuators of two-stage or two-stage modulating burners.
Checked pre-purging «t1» with nominal load air volume.
For information about actuators «SA»:
SQN3...:
refer to data sheet 7808
SQN7...:
refer to data sheet 7804
SQN9...:
refer to data sheet 7806
SQN3...151... or SQN3...251...
SQN90.220... / two-stage modulating control
* Note: with two-stage modulating burners (with gas regulation
damper «RV»), «BV2» and the dotted connection between
terminals (*) are not required
SQN7...454 / two-stage control,
SQN7...424 / two-stage control,
single-wire control
two-wire control
1 2
2
1 0
8
3
6
1 1
7
4
5
1
G P /S B
R /W
H S
0
I
L
N
A L
E K 2
M
L P
Z
B V 2
F E
7421a15/
0598
B V 1
9
S A
LM G 22...
L M G 2 ...
4
9
5
L R
S A
L
S B /R /W
B V 1
R V
B V 2
7 4 2 1 a 1 9 /1 0 9 8
1 2
1 2
2
1 0
8
3
6
1 1
9
5
7
*
4
1
G P /S B
R /W
A L
E K 2
M
L P
L R
Z
B V 1
F E
B V 2
*
*
L
N
0
I
H S
N
8
1
2
7
5
6
3
4
9
7
4
2
1a1
3
/1
0
98
L K
R V
SA
R 1
K 2
C 2
K 1
+
R 3
D
-
+
R 2
C 1
I
M S
C 3
III
II
V
LM G 22...
K L
Z u
III
L K P
N L
t1
III
t
7 4 2 1 d 0 4 /0 4 9 8
I
II
t4
T S A
1 2
2
1 0
8
3
6
1 1
9
5
7
4
1
G P /S B
R /W
A L
E K 2
M
L P
L R
Z
B V 1
FE
H S
0
I
N
L
6
8
1 0
2
1
3
7
9
74
2
1
a
1
4
/0
59
8
R V
L K
SA
R 1
K 2
R 3
C 2
K 1
+
D
-
+
R 2
C 1
I
M S
C 3
III
II
LM G 22...
L K P
zu
K L
N L
t
III
III
IV
IV
I
I
II
t1
T S A
t4
N
I
H S
L
LMG 22...
R / W
G P /S B
1 2
E K 2
3
8
Z
L R
5
F E
B V 1
B V 2
0
74
21
a
1
7
/10
98
B
C
A
a1
b 1
c 1
b 2
a 2
M
7
9
1 0
2
N
5
4
1
3
2
8
6
7
III
II
IV
I
6
1 1
A L
4
1
M
L P
4
N
1
5
N
I
H S
L
A
b1
a1
LMG22...
R / W
G P /S B
1 2
A L
E K 2
3
8
3
2
6
8
7
b2
a2
M
B
Z
L R
F E
BV1
4
1
0
1
2
7
4
21
a1
8
/10
98
1 0
9
5
7
B V 2
III
II
I
IV
2
6
1 1
L P
M