User Manual

ManualsBrandsSiemens ManualsBurner EquipmentActuators SQN3 SQN4

CC1N7808en

13.05.2016

Building Technologies Division

Infrastructure & Cities Sector

808

Actuators

SQN3...

SQN4...

Electromotoric actuators for use with air dampers and control valves of oil or gas

burners of small to medium capacity.

The SQN3... / SQN4... and this Data Sheet are intended for use by OEMs which

integrate the actuators in their products!

Use / features

The SQN3... / SQN4... actuators are designed to drive gas and air dampers on small to

medium-capacity oil or gas burners or for the load-dependent control of fuel and

combustion air volume:

- In connection with P-PI or PID controllers, such as the RWF...

- Directly via the different types of burner controls, such as LOA..., LMO..., LMG... or

LFL...

- In connection with 1- or 2-wire control or 3-position controllers

 All types of actuators

with:

- Impact-proof and heat-resistant plastic housing

- Screw terminals for the electrical connections

- Maintenance-free gear train, which can be disengaged

- Internal and external position indication

- Easy-to-adjust end and auxiliary switches for setting the switching points

 Holding torque:

- SQN3...

- SQN4...

0.8...3 Nm

6 Nm

 Running time:

- SQN3...

- SQN4...

4.5...30 s

120 s

 Direction of rotation:

- SQN30...

- SQN31... / SQN41...

counterclockwise

clockwise

Summary of content (17 pages)

PAGE 1
7 808 SQN3... SQN4... Actuators Electromotoric actuators for use with air dampers and control valves of oil or gas burners of small to medium capacity. The SQN3... / SQN4... and this Data Sheet are intended for use by OEMs which integrate the actuators in their products! Use / features The SQN3... / SQN4...
PAGE 2
Warning notes To avoid injury to persons, damage to property or the environment, the following warning notes must be observed! Do not interfere with or modify the actuators!      All activities (mounting, installation and service work, etc.) must be performed by qualified staff Before making any wiring changes in the connection area of the actuators, completely isolate the equipment from the mains supply (all-polar disconnection).
PAGE 3
Mechanical design Housing - Made of impact-proof and heat-resistant plastic The housing accommodates: – The reversible synchronous motor with gear train, which can be disengaged – The camshaft of the control section – The relays (depending on the type of actuator) – The switches, connected to the terminals via the printed circuit board Color: Drive motor - Coupling Gear train housing light-grey, cover dark-grey Reversible and locking-proof synchronous motor - 7808p08e/0205 - Shaft can be disengage
PAGE 4
Special versions for fitting potentiometer Fitting a potentiometer Certain types of actuators are supplied ready prepared for fitting a potentiometer. These actuators differ from the basic type only in that the housing is higher and that they are prepared for accommodating a potentiometer. Accessories are not required. The required type of potentiometer is to be ordered as a separate item (refer to «Ordering»).
PAGE 5
Type summary (others types of actuators are available on request) Actuators SQN30... / counterclockwise rotation 8) Diagram Drive Running Operating Holding HS shaft ¹) time torque torque 7) at 50 Hz ²) (max.) Nm Nm pcs. pcs. Relay Housing length ¹) Types for mains voltage / mains frequency AC 220 V -15 % AC 100 V -15 % AC 240 V +10 % AC 110 V +10 % mm 50...60 Hz 4) 50...60 Hz 3) no. no. for 90° 0 0 4.5 1 0.8 3 --- 125 SQN30.102A2700 5) --- 1 0 4.5 1 0.
PAGE 6
Type summary (others types of actuators are available on request) (cont’d) Actuators SQN41... / clockwise rotation 8) Diagram Drive Running Operating Holding HS shaft ¹) time torque torque 7) at 50 Hz ²) (max.) Relay Housing length ¹) Types for mains voltage / mains frequency AC 220 V -15 % AC 100 V -15 % AC 240 V +10 % AC 110 V +10 % no. no. for 90° Nm Nm pcs. pcs. mm 50...60 Hz 4) 50...60 Hz 3) 4 0 120 6 6 2 1 110 SQN41.
PAGE 7
Technical data General actuator data Actuator Mains voltage Mains frequency Primary fuse (external) Type of motor Power consumption Angular position Mounting position Degree of protection Safety class Cable entry Cable connections Ferrules Direction of rotation Torques and holding torques Running times Life cycle Weight (on average) End and auxiliary switches Number of end switches Number of auxiliary switches Actuation Switching voltage Adjustment of cams in increments of Perm.
PAGE 8
Function A synchronous motor drives the drive shaft and the camshaft via a gear train. The attached camshaft actuates the end and auxiliary switches. The switching position of each end and auxiliary switch can be adjusted within its working range via the associated cam. Some of the actuator versions are equipped with electronic modules for auxiliary functions in connection with the end and auxiliary switches or with external devices, such as controllers (refer to «Connection diagrams»).
PAGE 9
Connection diagrams  Note! The following connection diagrams show the actuator’s start position as supplied: - End switch position II (CLOSED) - Dead No. 0  LFL... / LGK16... / LAL... and LOK16... 2-stage or modulating operation  Prepurging at nominal load position «NL» LFL... / LGK16... / LAL... / LOK16...
PAGE 10
Connection diagrams (cont’d) No.   LFL... / LGK16... / LAL... / LOK16... 2-stage operation  Prepurging at nominal load position «NL» LFL... / LGK16... / LAL... / LOK16... 1 2 19 9 20 11 10 8 18 *) Thermostat or similar with NO contact (1-wire control) BV2 HS N 0 7 1 3 6 2 5 4 10 8 9 13 11 12 Si I *) BV1 LR SB N L I III II IV M ~ LK 1 7808a12/1004 SQN3x.
PAGE 11
Connection diagrams (cont’d) No.   LOA24... / LOA25... / LOA28... / LMO24... / LMO44... 2-stage operation  Prepurging at low-fire position «KL» LOA24.../LOA25.../LOA28.../LMO24.../LMO44... 2 1 10 8 1) 3 2) 7 6 4 5 11 12 W 1) 2) With oil preheater Without oil preheater *) Thermostat or similar with NO contact (1-wire control) 3) Cams III and IV are rigidly connected QRB...
PAGE 12
Connection diagrams (cont’d) No.   LMG21... / LMG25... / LGB21... 2-stage operation  Prepurging at low-fire position «KL» LMG21.../LMG25.../LGB21... 2 12 10 3 8 6 11 9 4 7 5 1 ION EK2 LP M AL Z BV1 GP R/W LR BV2 SB 1 6 2 I Si 0 III N L a 3 4 B b2 b1 5 7 7808a13/0304 N HS 3) IV b a 3) Cams III and IV are rigidly connected b A a3 a2 II I V MS a b a a b b 2 LK SQN3x.
PAGE 13
Connection diagrams (cont’d) No.   LMG22... / LGB22... / LGB32... 2-stage or modulating operation  Prepurging at nominal load position «NL» LMG22... / LGB22... / LGB32...
PAGE 14
Connection diagrams (cont’d) No.   LMG22... / LGB22... / LGB32... Modulating operation  Prepurging at nominal load position «NL» 1) LMG22... / LGB22... / LGB32... 12 2 10 3 8 6 5 9 11 4 7 1 ION EK2 GP LR R/W BV1 8 7 2 5 6 3 4 9 7808a14/1004 1 HS R3 R1 Si I b1 B N *) 2) Z SB 0 The cams of switches III and V are rigidly connected.
PAGE 15
Connection diagram (cont’d) No.   Special application N 7 3 1 6 5 2 I 4 10 8 II 9 13 11 III 12 IV M ~ LK 4 7808d04/1004 SQN4x.x4xAxxxx No.   TMG740 / TMO720 (burner control of other manufacture) 2-stage operation  Prepurging at nominal load position «NL» TMG740 / TMO720 2) 21 13 8 14 15 4 9 12 6 M NL BV1 1 B 5 2 3 4 8 b1 a a1 II 1) III V IV LK M b TMG... and TMO... are devices of other manufacture, neither made nor supplied by Siemens.
PAGE 16
Legend No.
PAGE 17
Dimensions 24 32 24 36 27.5 M,R 16 5.5 83 Viewing window 16 24 7808m01e/0205 M,R M,R Pg9 16.5 3) 22 Pg11 72 (96) 20 3 10 Dimensions in mm 10 3) 14 110 (125)1) > 85 44 32 76 Type of drive shaft Side view Type of drive shaft Drive shaft no. according to "Type summary" 14h10 25 17 8h9 45° 0 7 -0 5 .0 5 -0.05 10h9 14h10 12.5 2 5 +0.05 14h10 25 3 2) 10h9 8 -0.03 -0.09 10h9 14h10 6.5 6 All drive shafts are shown in end switch position II (CLOSED, as supplied).