Siemens SQN72 Series Manual

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...
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