SIEMENS LDU11.523A27 Air valve verification system

Electric actuator used with air damper and oil and gas control valve, medium and small burner.

SQN3.../SQN4... and this data sheet are for OEM use: integrate the actuator into the product

SQN3.../SQN4... actuators are designed to drive gas and air dampers, medium capacity oil or gas burners, or for fuel and

Combustion air volume:

With P-PI or PID controller (such as RWF)...

-Directly controlled by different types of burners..., I..., LMG。。。 Or LFL...

-Connection with 1-wire or 2-wire control or 3-bit controller

Impact-resistant and heat-resistant plastic housing, electrically connected screw terminals, separable maintenance-free gear train, internal and external position indication, easily adjustable end and auxiliary switch, used for setting switch points

-All activities (installation, installation and maintenance work, etc.) must be completely isolated from the main power supply (full pole disconnection) by qualified personnel before any wiring changes are made in the connection area of the actuator.

Ensure that the equipment will not be accidentally opened again, ensure protection against electric shock hazard by providing adequate protection, connect terminals and fix the housing cover

Every time when carrying out work (installation, installation, maintenance, etc.), check to ensure that the wiring is in an orderly state. Falling or shock will adversely affect the safety function. Such actuators shall not

Directives put into operation and applied: low-voltage directive 2014/35/EC, electromagnetic compatibility EMC (immunity) 2014/30/EC

Automatic electrical control devices for household and similar purposes

Part 1: General requirements

DIN EN 60730-1: Automatic electrical control devices for household and similar purposes, Part 2-14: Particular requirements for electric actuators

DIN EN 60730-2-14: The relevant valid version of the standard can be found in the following statement: Conformity

EAC conformity mark (Eurasian conformity mark)

Made of impact and heat resistant plastic

-The housing can accommodate:

– Reversible synchronous motor with gear train, separable

– Camshaft of control part

– Relay (depending on the type of actuator)

– Switches connected to terminals via printed circuit boards

Color: gear train housing light gray, cover dark gray

-Reversible anti-lock synchronous motor

-The shaft can be separated from the gear train and motor

By manually operating the coupling pressure pin ? K ?

-Automatic re-engagement

With adjustable cam

-The scale next to the cam indicates the angle of the switching point