Table of Contents
Advertisement
Quick Links
Use
Features
CC1N7802en
8/11/2021
Actuators for air and gas
dampers
Electromotoric actuators for air dampers and control valves of oil and gas
burners of small to medium heat capacity.
The SQN72/SQN73 and this data sheet are intended for original equipment
manufacturers (OEMs) using the SQN72/SQN73 in or on their products.
The SQN72/SQN73 actuators are designed for positioning and driving air/gas dampers
of oil burners, gas burners, and other ancillary equipment of small and medium heat
capacity. They also offer load-dependent control of the amount of fuel and combustion
air.
The controlling elements are controlled as follows depending on the current burner
load:
In connection with P-PI or PID controllers, such as the RWF5
Directly via the different types of burner controls, such as LOA, LMO, LME, or LFL
In connection with 1- or 2-wire control or 3-position controllers
Impact-proof and heat-resistant plastic housings
Plug terminals for the electrical connections
Maintenance-free gear train, which can be disengaged
Internal position indication
Easy-to-adjust end and auxiliary switches for adjusting the switching points
Internal electronic circuits
Protection type IP54
Holding torque 0.7–1.3 Nm
Running time 4–30 s
Direction of rotation: SQN72 counterclockwise and SQN73 clockwise
7
802
SQN72...
SQN73...
Smart Infrastructure
Advertisement
Table of Contents
Related Manuals for Siemens SQN72 Series
Summary of Contents for Siemens SQN72 Series
- Page 1 SQN72… Actuators for air and gas dampers SQN73… Electromotoric actuators for air dampers and control valves of oil and gas burners of small to medium heat capacity. The SQN72/SQN73 and this data sheet are intended for original equipment manufacturers (OEMs) using the SQN72/SQN73 in or on their products. The SQN72/SQN73 actuators are designed for positioning and driving air/gas dampers of oil burners, gas burners, and other ancillary equipment of small and medium heat capacity.
- Page 2 Supplementary documentation Product type Documentation type Documentation number Data sheet N7153 Data sheet N7451 LFL1.148 Data sheet N7454 LGK16 Data sheet N7785 LME2 Data sheet N7101 LME7 Data sheet N7105 LMO2 LMO4 Data sheet N7130 LMO39 LOA2 Data sheet N7118 LOA3 LOK16 Data sheet...
-
Page 3: Warning Notes
The user must ensure that the actuators meet the requirements of the relevant application standards Safety-related applications are only possible with Siemens burner controls All product-related activities (mounting, settings and maintenance) must be performed by appropriately qualified and authorized personnel ... -
Page 4: Mounting Notes
- The effect of mass moments of inertia (caused by the rotating parts in the motor as well as on the actuator) can lead to sudden impulse loads Siemens recommends overdimensioning the shaft connection by a factor of 2 compared to the rated torque of the actuator ... -
Page 5: Standards And Certificates
ISO 14001:2015 OHSAS 18001:2007 China RoHS Hazardous substances table: http://www.siemens.com/download?A6V10883536 Lifetime The actuator has a designed lifetime* of 250,000 start cycles (OFF ON OFF) under load with the rated torque in the entire rotation angle range, which under normal operating conditions in heating mode corresponds to approx. - Page 6 Design The lower housing is made of dark gray, impact-proof and heat-resistant plastic Housing The housing cover is made of light gray, impact-proof and heat-resistant plastic The housing encloses: – the synchronous motor with the disengageable reduction gear –...
- Page 7 Type summary (further types on request) ) left SQN72 actuators / direction of rotation Types for mains voltage / mains frequency ) +10%/-15% 230 V AC 50–60 Hz Article no. Type BPZ:SQN72.2A4A20 SQN72.2A4A20 BPZ:SQN72.4A4A20 SQN72.4A4A20 S55454-D303-A100 SQN72.2B4A21 BPZ:SQN72.2C4A20 SQN72.2C4A20 S55454-D301-A100 SQN72.4C4A21 BPZ:SQN72.6C4A20 SQN72.6C4A20...
- Page 8 Type summary (further types on request) ) right SQN73 actuators / direction of rotation Types for mains voltage / mains frequency ) +10%/-15% 230 V AC 50–60 Hz Article no. Type S55454-D345-A100 SQN73.4B4A20 Refer to Dimensions Specifications apply to 50 Hz; at 60 Hz, the running times are about 17% shorter. Approx.
- Page 9 Accessories To be ordered separately: Proportional controlling element with mounting plate VKP Proportional controlling element for mounting between threaded flanges in gas trains. Refer to Data Sheet N7646. Example: ASZxx.3x potentiometer Refer to Data Sheet N7921. Refer to Mounting Instruction 4 319 9604 0 (M7921). RWF50 compact universal controller For load-dependent control of the amount of fuel and combustion air in connection with P-PI or PID controllers.
- Page 10 Technical data Actuator Mains voltage 230 V AC -15%/+10% Mains frequency 50 to 60 Hz ±6% Actuator motor Synchronous motor Internal consumption Max. 6 VA Positioning angle, usable range Max. 160°, scale range 0–130° Mounting position Optional Degree of protection IP54 in accordance with EN 60529:1991 + A1:2000 + A2:2013 when using the cable entry provided plus plastic washers for the...
- Page 11 *) In case of modulating operation, fuel valve ‘BV2’ is replaced by a gas control valve ‘RV’ Please note! When connecting a fuel valve: Max. 0.3 A, cosφ >0.8 inductive. Safety-relevant applications are only available with Siemens burner controls! 11/20 Smart Infrastructure...
-
Page 12: Environmental Conditions
Technical data (continued) Environmental Please note! conditions Condensation, formation of ice, and ingress of water are not permitted. Failure to observe these poses a risk of damaging the safety functions and a risk of electric shock. Climatic conditions Storage Temperature range -20 to +60°C Humidity <... - Page 13 Circuit diagrams (examples) Please note! All of the following circuit diagrams show the start position as supplied: End switch position II CLOSED No voltage No. A LME22 2-stage or modulating operation prepurging at high-fire position (NL) X1 Plug-in space, 4-pole X2 Plug-in space, 5-pole blue...
- Page 14 Circuit diagrams (examples) No. B LOA24 / LOA25 / LOA26 / LOA28 / LOA36 / LMO24 / LMO44 2-stage operation prepurging at low-fire position (KL) Without oil preheater With oil preheater: If the oil preheater contact (OW) opens during operation, a restart follows Thermostat or similar unit with NO contact (1-wire control)
- Page 15 Circuit diagrams (examples) No. B LMO39 2-stage operation prepurging at low-fire position (KL) Without oil preheater With oil preheater Thermostat or similar unit with NO contact (1-wire control) X1 Plug-in space, 4-pole X2 Plug-in space, 5-pole Cam switches blue orange black One-sided approach to the target...
- Page 16 Circuit diagrams (examples) No. C LFL / LGK16 / LAL / LOK16 2-stage or modulating operation prepurging at high-fire position (NL) X1 Plug-in space, 4-pole X2 Plug-in space, 5-pole blue orange black Program sequence diagram shows modulating operation. 16/20 Smart Infrastructure CC1N7802en...
- Page 17 Circuit diagrams (examples) No. D LME22 2-stage or modulating operation prepurging at high-fire position (NL) X1 Plug-in space, 4-pole X2 Plug-in space, 5-pole X3 Plug-in space, 3-pole blue orange black green Program sequence diagram shows 2-stage operation. 17/20 Smart Infrastructure CC1N7802en 8/11/2021...
- Page 18 Circuit diagrams (examples) No. E LAL / LFL / LGK16 / LOK16 2-stage or modulating operation prepurging at high-fire position (NL) Thermostat or similar unit with changeover contact or 3-position controller for OPEN/CLOSED positioning pulses and neutral position In case of modulating operation, fuel valve ‘BV2’...
- Page 19 Designation for internal circuit. Appears in the second position after the period in the type reference I/II End switches III/IV/V Auxiliary switches Remote lockout display (alarm) Fuel valve stage 1 Fuel valve stage 2 Fuel valve stage 3 External remote lockout reset button Ionization probe Internal fuse, not replaceable Flame signal...
- Page 20 Dimensions in mm All shafts are shown in end switch position II CLOSED (as supplied). Through-hole Ø 5.3 mm Knockout opening Ø 5.3 mm 2021 Siemens AG Smart Infrastructure, Berliner Ring 23, 76437 Rastatt, Germany Subject to change! 20/20 Smart Infrastructure...