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CC1N7804en09.04.2003
Siemens Building TechnologiesHVAC Products
ISO 9001
7804
SQN70... / SQN71... SQN74... / SQN75...
Actuators SQN7...for air dampers and control valves of oil or gas burners
Reversible electromotoric actuators with torques up to 2.5 Nm
• Run times: - SQN70... / SQN71...- SQN74... / SQN75...
4...30 s4...60 s
• Versions: - Clockwise or counterclockwise rotation- With integrated electronic modules- Choice of drive shafts
• With 2 end and 2...4 auxiliary switches, some with fine adjustment• Geartrain can be disengaged• SQN70... / SQN71... - With adapter for direct replacement of actuators
type SQN30... / SQN31...• SQN74... / SQN75... - Drive shafts, fixing holes and cable entries are
matched to the same type of actuator supplied byConectron or Berger
• Versions with UL listing for use in the U.S. and Canada
The SQN7... and this Data Sheet are intended for use by OEMs which integratethe actuators in their products!
Use
The SQN7... actuators are designed for driving air and gas dampers of oil or gas burn-ers of small to medium capacity and afford load-dependent control of the amount ofgas, oil or combustion air• in connection with single- or 2-wire control, or 3-position controllers, or• directly via the burner control
2/22
Siemens Building Technologies CC1N7804enHVAC Products 09.04.2003
Warning notes
To avoid injury to persons, damage to property or the environment, the followingwarning notes should be observed!
Do not interfere with or modify the actuators!
• Before performing any wiring changes in the connection area of the actuator, com-pletely isolate the equipment from the mains supply (all-polar disconnection)
• Ensure protection against electric shock hazard by providing adequate protectionfor the terminals and by securing the housing cover
• Check to ensure that wiring is in an orderly state• Fall or shock can adversely affect the safety functions. Such units may not be put
into operation, even if they do not exhibit any damage
Mounting notes
• Ensure that the relevant national safety regulations are complied with
Installation notes
• Installation work must be carried out by qualified staff
Commissioning notes
• Commissioning work must be carried out by qualified staff• Prior to commissioning, ensure that wiring is in an orderly state
Norms and standards
Conformity to EEC directives- Electromagnetic compatibility EMC (immunity) 89 / 336 EEC- Low-voltage directive 73 / 23 EEC
Service notes
• Maintenance work must be carried out by qualified staff• Each time a unit has been replaced, check to ensure that wiring is in an orderly
state
Disposal notes
The actuator contains electrical and electronic components and may not be disposed oftogether with household waste.Local and currently valid legislation must be observed.
3/22
Siemens Building Technologies CC1N7804enHVAC Products 09.04.2003
Mechanical design
- Made of impact-proof and heat-resistant plastic
Color: SQN70... / SQN71...: Geartrain housing dark-grey,cover light-grey
SQN74... / SQN75...: Completely black
- Reversible and locking-proof synchronous motor
- Drive shaft can be manually disengaged from geartrain and motor- Automatic reengagement
- By means of adjustable cams- Scales beside the cams indicate the angle of the switching point- Assignment of cams to the end and auxiliary switches is color-coded (refer to
«Connection diagrams»)- Some of the cam switches feature fine adjustment; they can be changed with a
standard screwdriver- The other cams can be adjusted manually or with the enclosed hook-spanner or
similar tool
- Internally:Scale at the beginning of the camshaft on the geartrain side
- Screw terminals
- Maintenance-free
- Made of black-finished steel- Ready fitted to the front of the geartrain- Different versions available
- Front of the geartrain is used as the mounting surface- Actuator is secured via through-holes
- Made of glass-fiber reinforced epoxy resin- Metalized through-holes
Housing
Drive motor
Coupling
Adjustment ofswitching points
Position indication
Electrical connections
Geartrain
Drive shaft
Mounting and fixing
Printed circuit boards
4/22
Siemens Building Technologies CC1N7804enHVAC Products 09.04.2003
Type summary
Actuators SQN70... / counterclockwise rotation 9)
Diagram
no.
Driveshaft ¹)
no.
Run timeat 50 Hz 2)
for 90°
s
Nominaltorque 6)
Nm
Holdingtorque
Nm
AS10)
pcs.
Relays
11)
pcs.
Length ofhousing ¹)
mm
AC 230 V ³)+10 % -15 %
50...60 Hz
Type reference 8)
AC 110 V 4)
+10 % -15 %50...60 Hz
Type reference
SQN7... replaces
Type reference 7)
2 0 4 1.5 0.7 2 2 117 SQN70.224A20 --- ---
4 0 4 1.5 0.7 2 3 117 SQN70.244A20 --- SQN30.121A2700
6 0 4 1.5 0.7 2 --- 80 SQN70.264A20 --- SQN30.101A2700
9 0 4 1.5 0.7 2 1 117 SQN70.294A20 --- SQN30.111A2700
2 0 6 1.5 0.7 2 2 117 SQN70.324A20 --- SQN30.151A2700
2 0 12 2.5 1.2 2 2 117 SQN70.424A20 --- ---
5 0 12 2.5 1.2 2 3 117 SQN70.454A20 --- ---
6 0 12 2.5 1.2 2 --- 80 SQN70.464A20 --- ---
6 3 12 2.5 1.2 4 --- 80 SQN70.464A23 --- ---
2 0 30 2.5 1.3 2 2 117 SQN70.624A20 --- ---
6 3 30 2.5 1.3 2 --- 80 SQN70.664A23 --- SQN30.401A2730
Actuators SQN71... / clockwise rotation 9)
Diagram
no.
Drive
shaft ¹)
no.
Run time
at 50 Hz ²)for 90°
s
Nominal
torque 6)
Nm
Holding
torque
Nm
AS
10)
pcs.
Relays11)
pcs.
Length of
housing ¹)
mm
AC 230 V ³)
+10 % -15 %50...60 Hz
Type reference 8)
AC 110 V 4)
+10 % -15 %50...60 Hz
Type reference
SQN7... replaces
Type reference 7)
2 0 4 1.5 0.7 2 2 117 SQN71.224A20 --- SQN31.151A2700
6 0 4 1.5 0.7 2 --- 80 SQN71.264A20 --- SQN31.101A2700
2 0 12 2.5 1.2 2 2 117 SQN71.424A20 --- ---
6 0 30 2.5 1.3 2 --- 80 SQN71.664A20 --- SQN31.401A2700
Actuators SQN74... / counterclockwise rotation 9)
Diagram
no.
Drive
shaft ¹)
no.
Run time
at 50 Hz ²)for 90°
s
Nominal
torque 6)
Nm
Holding
torque
Nm
AS
10)
pcs.
Relays11)
pcs.
AC 230 V ³)
+10 % -15 %50...60 Hz
Type reference 8)
AC 110 V 4)
+10 % -15 %50...60 Hz
Type reference
9 1 4 1.5 0.7 2 1 SQN74.294A21 ---
Actuators SQN75... / clockwise rotation 9)
Diagram
no.
Drive
shaft ¹)
no.
Run time
at 50 Hz ²)for 90°
s
Nominal
torque 6)
Nm
Holding
torque
Nm
AS
10)
pcs.
Relays11)
pcs.
AC 230 V ³)
+10 % -15 %50...60 Hz
Type reference 8)
AC 110 V 4)
+10 % -15 %50...60 Hz
Type reference
2 1 4 1.5 0.7 2 2 SQN75.224A21 ---
2 6 4 1.5 0.7 4 2 SQN75.224A26 ---
4 1 4 1.5 0.7 2 3 SQN75.244A21 ---
4 6 4 1.5 0.7 4 3 SQN75.244A26 ---
9 1 4 1.5 0.7 2 1 SQN75.294A21 ---
9 1 4 1.5 0.7 4 1 SQN75.294A26 ---
F 1 4 1.5 0.7 4 3 SQN75.2F6A21 ---
2 1 12 2.5 1.2 2 2 SQN75.424A21 ---
2 6 23 2.5 1.2 4 2 SQN75.524A26 ---
K 1 30 2,5 1,3 2 --- SQN75.6K4A21 SQN75.6K4A116 3 30 2.5 1.3 4 --- SQN75.664A26 ---
9 1 30 2.5 1.3 2 1 SQN75.694A21 ---
5/22
Siemens Building Technologies CC1N7804enHVAC Products 09.04.2003
¹) Refer to «Dimensions»
²) At 60 Hz, run times are about 20 % shorter
³) AC 220...240 V +10 % / -15 % possible, but in the case of undervoltage torque is reduced by about 20 %4) AC 100...120 V +10 % / -15 % possible, but in the case of undervoltage torque is reduced by about 20 %6) Under nominal conditions; under extreme conditions (e.g. +60 °C, AC 230 V –15 %) approx. –25 %7) Refer to «Replacement of SQN30... / SQN31...»8) Actuator types in normal printing and other types are available on request9) When facing the drive shaft and when control voltage is present at end switch I
10) Auxiliary switches (in addition to the 2 end switches)11) Integrated relays
Ordering
When ordering, please give type reference of actuator and accessories according to«Type summary».
Following item must be ordered separately and is also supplied as a separate item:• Adapter AGA70.3 for replacing SQN3...
Accessories
Adapter AGA70.3
Not suited for use with SQN74... / SQN75...!
For mounting the SQN70... / SQN71... in place of the SQN3...;fitted to the SQN70... / SQN71... with a self-tapping screw.
Screw and washer are included in the supply.
Legend to«Type summary»
6/22
Siemens Building Technologies CC1N7804enHVAC Products 09.04.2003
Technical data
Mains voltage AC 230 V –15 % +10 %AC 110 V –15 % +10 %
Mains frequency 50...60 Hz ±6 %Safety class- SQN70... / SQN71...- SQN74... / SQN75...
II to VDE 0631I to VDE 0631
Drive motor synchronous motorPower consumption 6 VAOn time 60 %, max. 3 min. continuous operationAngular adjustment max. 160°, scale range 0...130°Mounting position optionalDegree of protection- All types
- SQN74... / SQN75...
IP 40 to DIN 40050, provided adequatecable entries and fixing screws are used
IP 20 to DIN 40050, provided lateralknockout hole for cable is used
Cable entry- SQN70... / SQN71...
- SQN74... / SQN75...
insertable cable gland holder with threadfor 2 x Pg9, no locknut required
openings for locknut for fixing cable glandsType of locknut
1 x Pg91 x Pg11
M Pg9 DIN 46320 MSM Pg9 DIN 46320 MS
additional lateral knockout hole for loseintroduction of 2 cables with a max. dia. of6 mm, cable strain relief to be provided bythe user (also refer to «Degree of protec-tion»).Pg glands and locknuts are not part of thedelivery.
Cable connections screw terminals for min. 0.5 mm² and max.2.5 mm² cross-sectional area
Ferrules matching the dia. of the stranded wireDirection of rotation refer to «Type summary»Nominal and holding torque refer to «Type summary»Run times- SQN70... / SQN71...- SQN74... / SQN75...
4...30 s for 90°4...60 s for 90°
Coupling disengagement of drive shaft / geartrainwith a pin
Backlash between drive motorand drive shaft- As supplied- After 250,000 cycles
≤ 1.2° ±0.3°≤ 1.5° ±0.3°
Weight (average) approx. 500 g
General actuator data
Actuator
7/22
Siemens Building Technologies CC1N7804enHVAC Products 09.04.2003
Technical data (cont’ d)
Number of end switches 2Number of auxiliary switches– SQN70... / SQN71...– SQN74... / SQN75...
1...22...4
Actuation via camshaft, color-coded cams (refer to«Connection diagrams»
switches with fine adjustment- SQN70... / SQN71... : II and III- SQN74... / SQN75... : III and IV
Breaking voltage AC 24...250 V
Perm. loading on terminals at cos ϕ = 0.9:• Connection diagram �
– Terminals 1, 2, 3, 4– Terminals 5, 6, 7
< 0.5 A1 A (7 A) ¹)
• Connection diagram �– Terminals 1, 2, 6, 7– Terminals 3, 4
< 0.5 A1 A (7 A) ¹)
• Connection diagram �– Terminals 1, 2, 3– Terminal 4– Terminal 5– Terminal 6– Terminal 7– Terminal 8
< 0.5 A2 A (14 A) ¹)2 A (14 A) ¹)1 A (7 A) ¹)1 A (7 A) ¹)< 0.5 A
• Connection diagram �– Terminals 1, 2, 3, 8, 11– Terminals 4, 5, 7, 10
< 0.5 A1 A (7 A) ¹)
• Connection diagram �– Terminals 1, 3– Terminal 4– Terminal 5– Terminal 6– Terminal 7– Terminal 8
< 0.5 A3 A (14 A) ¹)3 A (14 A) ¹)1 A (7 A) ¹)1 A (7 A) ¹)< 0.5 A
• Connection diagram �– Terminals 1, 2, 3– Terminal 4– Terminal 5– Terminal 6– Terminal 7– Terminal 8
< 0.5 A2 A (14 A) ¹)2 A (14 A) ¹)1 A (7 A) ¹)1 A (7 A) ¹)< 0.5 A
• Connection diagram �– Terminals 1, 2, 3, 4, 5– Terminal 6– Terminal 7– Terminal 8
< 0.5 A1 A (7 A) ¹)1 A (7 A) ¹)1 A (7 A) ¹)
• Connection diagram �– Terminals 1, 2, 3, 4, 5– Terminal 6– Terminal 7– Terminal 8
< 0.5 A1 A (7 A) ¹)1 A (7 A) ¹)< 0.5 A
• Connection diagram F– Terminals 2...7– Terminals 1, 8, 9
< 0.5 A1 A (7 A) ¹)
End and auxiliaryswitches
8/22
Siemens Building Technologies CC1N7804enHVAC Products 09.04.2003
• Connection diagram K
– Terminals 1, 2– Terminals 3, 4, 5, 6,7 ,8
< 0.5 A1 A (7 A) ¹)
¹) Amperages in parentheses are permitted as short-time peak loads for max. 0.5 secondsAdjustment of cams- Without fine adjustment- With fine adjustment
1°infinitely
Environmental conditionsTransport DIN EN 60 721-3-2Climatic conditions class 2K2Mechanical conditions class 2M2Temperature range -50...+60 °CHumidity < 95 % r.h.Operation DIN EN 60 721-3-3Climatic conditions class 3K5Mechanical conditions class 3M2Temperature range -20...+60 °CHumidity < 95 % r.h.
Condensation, formation of ice and ingress of water are not permitted!
Function
The synchronous motor drives the drive shaft which carries the camshaft.
The camshaft actuates the end and auxiliary switches.Using the associated cam, the switching position of each end and auxiliary switch canbe adjusted within the working range.Some of the actuator versions are equipped with electronic modules that perform aux-iliary functions in connection with the end and auxiliary switches or with external de-vices, such as controllers (refer to «Connection diagrams»).The functions and technical data of both lines of actuators SQN70... / SQN71... andSQN74... / SQN75... are nearly identical.
Using an adapter (refer to «Accessories»), actuators type SQN30... and SQN31... canbe replaced by the SQN70... / SQN71... .
There are no mechanical modifications required.The different terminal assignments of the 2 types of actuators must be observed, how-ever.
The «Type summary» contains the SQN3... that can be replaced by SQN7...actuators.
The SQN30... and SQN31... listed in «Type summary»• refer to the SQN7... AC 230 V versions.
The respective SQN3... AC 110 V versions use the same type reference as theAC 230 V versions, with one exception: Type suffix ..A27.. is replaced by ..A17.. .
• are versions with no facility for fitting a potentiometer (refer to Data Sheet 7808)
Norms and standards
Replacement ofSQN30... / SQN31...
9/22
Siemens Building Technologies CC1N7804enHVAC Products 09.04.2003
Connection diagrams
1H
SN
84
N
I
L
B
a1
A
b1
LOA
... /
LMO
...
AL
OH
73
52
SQ
N7x
.x44
xxx
a2b2
M
c1
Z
LR
BV
1
37
64
511
12
QR
BO
W
3)
2)1)
IIIII
I
C
GP
R
BV
2
21
08
1
M
6 IV
7804a01/0502
4
0
SB
S2)
zuKL
LKP
NL
t1
t4
tT
SA
II
IIIIII
IVIV
II78
04d0
9/11
01
S4)
S5)
2-st
age
op
erat
ion
Pre
pu
rge
at lo
w-f
ire
po
siti
on
<K
L>
(see
<S
5>)
SB
GP
R/W
OH
OW
M LR BV
1
BV
2
FS
M10
0 %
BV
2
min
.
0 %
I IV III IILK
AC
twt1
t4
LOA
... /
LMO
...B
D
7804d21/1001
1) W
ithou
t oil
preh
eate
r2)
Ref
er to
Dat
a S
heet
711
83)
LO
A...
/ LM
O...
with
oil
preh
eate
r:
If c
onta
kt <
OW
> op
ens
durin
g op
erat
ion,
ther
e w
ill b
e a
c
ompl
ete
new
sta
rt
I R
edII
Blu
eIII
O
rang
eIV
B
lack
Nr.
4
L
OA
24.1
71...
/LO
A24
.173
.../L
OA
24.1
74...
/LO
A24
.571
.../L
OA
25...
/LO
A26
...
LO
A28
.../L
OA
36...
/LM
O24
.../L
MO
44...
For
not
es o
n <S
1...S
5> re
fer t
o <N
otes
on
conn
ectio
n di
agra
ms>
10/22
Siemens Building Technologies CC1N7804enHVAC Products 09.04.2003
Connection diagrams (cont’ d)
1H
SN
8
N
I
L
C
LOA
... /
LMO
...
AL
OH
73
54
SQ
N7x
.x94
Axx
x
M
c1
Z
LR
BV
1
37
64
511
12
QR
BO
W
2)
IIIII
I
R
BV
2
21
08
1
M
6 IV7804a07/0502
9
0
SB
S2)
2
GP
SB
GP
R/W M LR BV
1
BV
2
FS
M10
0 %
BV
2
min
.
0 %
I IV III IILK
AC
t1t4
LOA
... /
LMO
...B
D
7804d012/1202
1)1)
LKP
zu*
KL
NL
t
IIIIII
IVIVI
t1TS
A
t4
7804
d13/
1101
S5
)
I R
edII
Blu
eIII
O
rang
eIV
B
lack
Pro
gram
seq
uenc
e w
ithou
t oil
preh
eate
r1)
Vol
tage
at t
erm
inal
no.
8 o
f the
SQ
N7.
..2)
Ref
er to
Dat
a S
heet
711
8
Nr.
9
L
OA
... /
LM
O24
.../L
MO
44...
2-st
age
op
erat
ion
Pre
pu
rge
at lo
w-f
ire
po
siti
on
<K
L>
(see
<S
5>)
For
not
es o
n <S
1...S
5> re
fer t
o <N
otes
on
conn
ectio
n di
agra
ms>
* W
hen
burn
er is
<O
FF>,
the
air
dam
per
mai
ntai
ns p
ositi
on <
KL>
. N
o <D
ampe
r C
LOS
ED
> po
sitio
n, r
efer
to n
otes
on
conn
ectio
n d
iagr
ams
<S3>
. C
on
nec
tion
dia
gra
m n
o. 4
LO
A...
/ L
MO
... u
sed
th
e s
ame
func
tion
with
air
dam
per
clos
ed w
hen
burn
er is
<O
FF>.
11/22
Siemens Building Technologies CC1N7804enHVAC Products 09.04.2003
Connection diagrams (cont’ d)
SQ
N7x
.x24
xxx
4N
15
N
I
HS
L
A
b1
a1
RGP12
EK
238
32
68
7
b2 a2
M
BZ
LR
FE
BV
1
41
0
12
7804a04/0502
109
57
BV
2
2III
III
IV
6 LP
M
2
LGB
22
/ 32.
..LM
G 2
2... A
L
11
SB
S1)
AB
D
LK
M10
0 %
BV
2
min
.0
%
I IV III II
7804d03/1001
GP
/SB
R/W M LP BV
2
BV
1
LR
FS
9
twt1
CLG
B22
... /
LGB
32...
/ LM
G22
...
LKP
zuKL
NL
t
IIIIII
IVIV
II
IIt1
TSA
t4
7804
d07/
0901
2-st
age
or
mo
du
lati
ng
op
erat
ion
Pre
pu
rge
at n
om
inal
load
po
siti
on
<N
L>
Nr.
2
L
GB
22...
/ L
GB
32...
an
d L
MG
22...
I R
edII
Blu
eIII
O
rang
eIV
B
lack
For
not
es o
n <S
1...S
5> re
fer t
o <N
otes
on
conn
ectio
n di
agra
ms>
Pro
gram
seq
uenc
e di
agra
ms
show
2-s
tage
ope
ratio
n.F
or m
odul
atin
g op
erat
ion,
ref
er to
<S
1>.
12/22
Siemens Building Technologies CC1N7804enHVAC Products 09.04.2003
Connection diagrams (cont’ d)
LP
SQ
N7x
.x54
xxx
N
HS
L
RGP
12
EK
2
38
Z
LR
5
FE
BV
1
BV
2
0
7804a03/0502
5
BC
Aa1
b1
c1
b2 a2
M
910
2
N5
41
32
86
7
IIIII
IVI
611
MA
L
41
7
LGB
22
/ 32.
..LM
G 2
2...
I
SB
S2)
LGB
22...
/ LG
B32
... /
LMG
22...
AB
D
LK
M10
0 %
BV
2m
in.
0 %
I IV III II
7804d04/1001
SB
GP
R/W M LP BV
2
BV
1
LR FS
C
1 21
2
t1tw
9 LKP
zuKL
NL
t
IIIIII
IVIVI
I
IIt1
TSA
t4
7804
d10/
0901
I R
edII
Blu
eIII
O
rang
eIV
B
lack
For
not
es o
n <S
1...S
5>, r
efer
to <
Not
es o
n co
nnec
tion
diag
ram
s>
2-st
age
op
erat
ion
Pre
pu
rge
at n
om
inal
load
po
siti
on
<N
L>
Nr.
5
L
GB
22...
/ L
GB
32...
an
d L
MG
22...
13/22
Siemens Building Technologies CC1N7804enHVAC Products 09.04.2003
Connection diagrams (cont’ d)
1 b1
LP
HS
8N
4
NL
B
a1
A
LGB
21.
..
12
EK
2
AL
210
3
53
27
6
SQ
N7x
.x44
xxx
b2 a2
M
c1
C
R
GP
611
4
FE
51
07804a02/0502
8
IIIII
IVI
Z
BV
1
LR
7
BV
2
4
*
LMG
21.
.. / 2
2...
/ 25.
..
9
I
M
SB
S2)
GP
/SB
R/W
M LR Z BV
1
BV
2
FS
AB
C
t1
BV
2
Zl/K
l
Zu
M
LK
IV III II
D
7804d02/1001
Auf
I
LGB
21...
/ LM
G21
... /
LMG
22...
/ LM
G25
...
I
KL
zuNL
LKP
t
I
IIIIII
IVIV
IITS
A
t4
t178
04d0
8/11
01
S5)
I R
edII
Blu
eIII
O
rang
eIV
B
lack
* R
equi
red
only
with
LG
B21
...
For
not
es o
n <S
1...S
5>, r
efer
to <
Not
es o
n co
nnec
tion
diag
ram
s>2-st
age
op
erat
ion
Pre
pu
rge
at lo
w-f
ire
po
siti
on
<K
L>
(see
<S
5>)
Nr.
4
L
GB
21...
/ LM
G21
...
14/22
Siemens Building Technologies CC1N7804enHVAC Products 09.04.2003
Connection diagrams (cont’ d)
IHS
LN
M
1N
2
LFL.
.. / L
GK
16...
/ LA
L...
/ LO
K16
...
SQ
N7x
.x64
xxx
34
65
7
6
8
0
7804a06/0502
1
IIIIV
III
2010
18 BV
2
LRB
V1
198
29
11
S1)
S1)
SB
R M1
M2
Z BV
1
LR*
100
%
min
.0
%
RV
*
FS
LK*
MI IV III II
A
7804d06/0901
C
LFL.
.. / L
GK
16...
/ LA
L...
/ LO
K16
...
t1
BD
LKP
zuKL
NL
t
III
II
IIt1
TS
A
t4
7804
d11/
0901
I
III
For
not
es o
n <S
1...S
5>, r
efer
to <
Not
es o
n co
nnec
tion
diag
ram
s>
I R
edII
Blu
eIII
O
rang
eIV
B
lack
* M
odul
atin
g
Pro
gram
seq
uenc
e di
agra
ms
show
mod
ulat
ing
oper
atio
n.F
or 2
-sta
ge o
pera
tion,
refe
r to
<S1>
2-st
age
or
mo
du
lati
ng
op
erat
ion
Pre
pu
rge
at n
om
inal
load
po
siti
on
<N
L>
Nr.
6
L
FL...
/ LG
K16
... /
LAL.
.. / L
OK
16...
15/22
Siemens Building Technologies CC1N7804enHVAC Products 09.04.2003
Connection diagrams (cont’ d)
LFL.
.. / L
GK
16...
/ LA
L...
/ LO
K16
... c1
1
I
NL
HS
2
LR
M
37
54
9
6
0
7804a05/0502
III
IIIIV
118
1011
209
19
BV
2
N8 C
2
SQ
N7x
.x94
xxx
8
BV
1
S2)
SB
R M1
M2
Z BV
1
LR BV
2
FS
AB
t1
7804d05/0901
CD
LFL.
.. / L
GK
16...
/ LA
L...
/ LO
K16
...
LK
M10
0 %
BV
2m
in.
0 %
I IV III II
LKP
zuKL
NL
t
IIIIII
IVIVI
I
IIt1
TSA
t4
7804
d10/
0901
For
not
es o
n <S
1...S
5>, r
efer
to <
Not
es o
n co
nnec
tion
diag
ram
s>
I R
edII
Blu
eIII
O
rang
eIV
B
lack
2-st
age
op
erat
ion
Pre
pu
rge
at n
om
inal
load
po
siti
on
<N
L>
Nr.
9
L
FL
... /
LG
K16
... /
LA
L...
/ L
OK
16...
16/22
Siemens Building Technologies CC1N7804enHVAC Products 09.04.2003
Connection diagrams (cont’ d)
For
not
es o
n <S
1...S
5>, r
efer
to <
Not
es o
n co
nnec
tion
diag
ram
s>
Dia
gram
not
pos
sibl
e w
ith S
QN
70...
/ S
QN
71...
3-st
age
op
erat
ion
Pre
pu
rge
at s
tag
e 3
Nr.
F
L
AL
... /
LF
L...
LF
L...
/ L
AL
...A
BC
D
R M1
M2 Z
ST
.1
ST
.2
ST
.3
BV
2
BV
3
FS
0%
LK
IV
IIV V III II
7804d19/1202
t1
ST
.1
M
ZU
**III
V
IVV
I
BV
1BV
2BV
3
ST.
1
ST
.2S
T.3
III
LK
P
t1t
7804d20/1202
AS
4)
I
R
ed
II
Blu
e
I
II
Ora
nge
IV
Y
ello
w
V
Bla
ck
V
I
Gre
enS
T1.
..3
Sta
ge 1
...3
HS
N
I
L
LFL.
.. / L
AL.
..
SQ
N75
.2F
6xxx
48
1814
19
7804a14/0403
0
BV
3
BV
1
20
11
109
1)
W
N7
56
38
19
2
B b2a2 A
M
b1 a1
4
13
LP
R
51
2
BV
2
1
SB
ϑS
T.3
ST.
1
ϑ ST.
2
F
C
c
2
17/22
Siemens Building Technologies CC1N7804enHVAC Products 09.04.2003
Connection diagrams (cont’ d)
A
TM
G74
0T
MO
720
81
31
415
8
SQ
N74
.x15
xxx
SQ
N75
.x15
xxx
M
NL
46
7804a09/1202
9
V
BV
2
1
12
43
2
IV5
III
N
*II
I
a1a2
6
ba
17
B
bb
aa
b / 2
1**
M
L2
NL
KL
zu
IIIV
I III
resp. 6°*
IV
III
III
IVVI
V
IV
III
LKP
IIt
7804
d16e
/040
3I
Red
II B
lue
III
Ora
nge
IV
Ora
nge
V
Bla
ck
For
not
es o
n <S
1...S
5>, r
efer
to <
Not
es o
n co
nnec
tion
diag
ram
s>
TM
G...
/ T
MO
... a
re d
evic
es o
f o
ther
man
ufa
ctu
re;
they
are
nei
ther
mad
e n
or
sup
plie
d b
y u
s.T
he
com
bin
atio
n w
ith
ou
r ac
tuat
or
pro
po
sed
her
em
ust
be
chec
ked
wit
h t
he
sup
plie
r o
f th
e T
MG
... /
TM
O...
wh
ile t
akin
g in
to c
on
sid
erat
ion
saf
ety
asp
ects
and
th
e cu
rren
t ve
rsio
n o
f th
e b
urn
er c
on
tro
l.Th
e us
er a
ssum
es f
ull r
espo
nsib
ility
for
thi
sap
plic
atio
n.
Wiri
ng d
iagr
am n
o. 1
cor
resp
onds
to w
iring
dia
gram
no.
3
of th
e S
QN
3...
App
licat
ion
only
pos
sibl
e w
ith S
QN
74...
/ S
QN
75...
2-st
age
op
erat
ion
Pre
pu
rge
at n
om
inal
load
po
sitio
n <
NL
>N
r. 1
TM
G74
0 / T
MO
720
* C
ams
III a
nd IV
are
rigi
dly
conn
ecte
d
** T
MO
720
term
inal
no.
6
TM
G74
0 te
rmin
al n
o. 2
1
18/22
Siemens Building Technologies CC1N7804enHVAC Products 09.04.2003
Connection diagrams (cont´d)
Nr. � → Universal use
SQN7x.x03xxx
7804
a10/
1101
0
43 2 5N 61 7
MIIIIII
I RedII BlueIII Orange
Nr. K → Universal use
SQN7x.xK4xxx
7804
a11/
1101
K
2 4N 31 5
MIIIIII
N 67 8
IV
I RedII BlueIII OrangeIV Black
For notes on «S1...S5», refer to «Notes on connection diagrams»
19/22
Siemens Building Technologies CC1N7804enHVAC Products 09.04.2003
No. � Number corresponds to the designation number or letter of the internal cir-cuit of the SQN7... (second character after the dot in the type code)
AL Remote indication of fault (alarm)BV1 Fuel valve stage 1BV2 Fuel valve stage 2BV3 Fuel valve stage 3EK2 External remote reset buttonFE Ionization probeFS Flame signal amplifierGL Air / gas ratio controllerGP Gas pressure switchHS Main switchKL Low-fireL LiveLK Air damperLKP Air damper positionLP Air pressure switchLR Load controller (also refer to «S1»)M Burner or fan motorM Actuator’s drive motor
M1 Without postpurgeM2 With postpurgeN Neutral conductorNL Nominal loadOH Oil preheaterOW Oil preheater’s readiness contactQRB... Photoresistive flame detectorR Temperature or pressure controller
RelayRV Controller damperSA Actuator
FuseSB Safety limiterST... Staget... / T... Program time (refer to the Data Sheet of the relevant burner control)TSA Safety time
R ResistanceZ Ignition transformerZU Damper fully closeds Direction of rotation OPENt Direction of rotation CLOSE
Program sequence – diagramsA Burner ONA – B Startup of burnerB – C Burner operation / load control operation, modulating or 2-stageC Burner OFFC – D Overrun timeD End of program, burner control ready for new start
Legend
20/22
Siemens Building Technologies CC1N7804enHVAC Products 09.04.2003
Notes on connection diagrams
• 2-stage operation
Burner control
LR SA
BV1
7804a12e/0402
RV
BV2
Thermostat or similar, with changeovercontact (2-wire control).
In place of «BV2», it is possible to use acontrol damper that is rigidly connected tothe air damper (shown in broken lines).
• Modulating operation
Burner control
LR SA
BV1
7804a13e/0402
RVLK
GL
LR load controller for temperature orpressure controlType RWF40...Digital PID universal controller for• temperature or pressure control• 2-stage or modulating operation, and
with special functions for heat generation plant(refer to Data Sheet 7865)
3-position controller for OPEN / CLOSEpositioning pulses with neutral position inbetween (2-wire control).
«BV2» is not used. Air / gas ratio control isused instead.
This can be accomplished in the form of• a control damper «RV» that is rigidly
connected to the air damper, or• an air / gas ratio controller «GL» type
SKP70... (refer to Data Sheet 7651)that – if combined with safety shutoff –is used in place of «BV1» (shown inbroken lines)
Thermostat or similar with N.O. contact (single-wire control).
In heating systems where the air damper does not fully close in the case of burnerOFF, thermal uplift occurs in the flueways (boiler, stack), causing the boiler to cooldown rather quickly, thus giving rise to increased heat losses.
If, during the program sequence, a damper position switch is approached from bothsides, it is not actuated in the same damper position, due to the switching differential.To ensure that actuation takes place in the same position, the program sequencemakes certain the required damper position will be passed for a short period of time.
The prepurge rate of the heat generation system (boiler, stack, etc.) prior to establish-ment of the flame must be in compliance with country-specific regulations. As a generalrule, the prepurge rate with oil burners should be 3 times the volume of the heat gen-eration system, and with gas burners, 5 times that volume. But these are only guidevalues. The effective prepurge volume required depends primarily on the type of con-struction of the heat generation system and is entirely the responsibility of the manu-facturer of that system. If prepurging is selected for the low-fire position, the prepurgetime is to be appropriately extended (against prepurging for the nominal load) to attainthe required air volume.
• For supplementary connections on the burner controls, refer to the relevant Data Sheets
• For auxiliary switches with fine adjustment, refer to «Technical data»
• In the connection diagrams, the positions of the end and auxiliary switches I...VI in the actuator for theworking range are shown between 0° and the adjusted angular position of the cams, that is, in the start position
S1) Controller for:
S2)
S3)
S4)
S5)
21/22
Siemens Building Technologies CC1N7804enHVAC Products 09.04.2003
Dimensions
Dimensions in mm
SQN70... / SQN71...
36
Drive shaft versionsSide view
7804
m01
e/05
02
Drive shaft versionsCross-section
1)
0
6
3)
3
26
24 24
MR
M,R
T
M,R
21
33
66
66,5
90
1616ø 5,3
ø 11
18 22
2xPg9
> = 105
6 AGA70.3
17
25
6,5
25
10h9
5 0+0,05
80,
09+0
,03
> = 65
Drive shaft no.
7 00.05
45°
8 h9
117 2)
80 2)
4)
1 x 3/8" adapter(connector)for U.S. and Canada
5)
25
3
9
30
9,5
+0,
018
- +0,0
5
1) Drive shafts are shown in their fully closed position (voltage present at end switch II)Drive shaft no. is identical with the 6th character after the dot in the type referenceExample: SQN70.664A23 = drive shaft no. 3
2) Length of housing depends on the type of actuator (refer to «Type summary»)3) Center slot: 6.3 mm deep
Hole dia. 5.1 mm: 16.5 mm deep (including depth of center slot)4) Not part of the delivery5) Supplied with types SQN7x.xxxRxxR Fixing positions matched to SQN3...
(for 1-to-1 replacement by SQN70... / SQN71..., use AGA70.3)M Through-hole 5.3 mm dia.T Knockout hole 5.3 mm dia.
22/22
Siemens Building Technologies CC1N7804enHVAC Products 09.04.2003
Dimensions (cont’ d)
Dimensions in mm
SQN74... / SQN75...78
04m
02e/
0402
Drive shaft versionSide view
1)Drive shaft versionCross-section
1
26
R R
A
19,519 Pg11
M
30,5
M
103,
5
65
104,
5
16
A
115
> = 100
25
790°
8 h9
0Drive shaft no.
26
76,5
Pg9
0,05
6
-0,0
9ø1
4
3,5
1) Drive shaft shown in fully closed position (voltage present at end switch II)
A Knockout hole for lose cable entry
R Through-hole 5.3 mm dia.
Fixing positions matched to Conectron LKS 160 and Berger STA
M Pg nuts, not part of the delivery (for type reference, refer to «Technical data»)
2003 Siemens Building TechnologiesSubject to change!