Servomotor Type SQN 3...
dreizler A 3001 E - 18.12.2015 | A 2026 - 2.14 | EN - 11.11.2014
57
17 Servomotor Type SQN 3...
Electromotoric actuator for air dampers and regulating valves in gas and oil burners
The actuators are designed for load-independent regulation of the fuel and combustion air flow, e.g. in con-
nection with PID controllers, or directly via various automatic firing sequence controls.
NOTICE:
For more information about type-specific component characteristics, please see relevant manufacturer
documentation.
17.1 Function
A synchronous motor drives a drive shaft with fitted cam roller by way of a gear box. The cam roller actuates
limit and auxiliary switches. The switching position of each limit or auxiliary switch can be configured by
way of an associated cam disk within its movement range.
The axis can be disconnected from gear box and motor by way of manual activation of a coupling with lock-
ing bolt (3) and (6).
17.2 Preadjustment of the servomotor SQN 3...
NOTICE:
Before commissioning or replacement of the servomotor the rotating direction must be noticed. Depending
on mounting position, actuators with anti-clockwise or clockwise rotational direction are used.
Actuator SQN 30... anti-clockwise rotational direction
Actuator SQN 31... clockwise rotational direction
The ease-of-movement of the air damper and the linkage must be checked.
Fig. 17-1 Potentiometer SQN3..., side view
1
Control panel
2
Marking arrow
3
Locking bolt
4
High cover
5
Roll scale
6
Axle
7
Basement
8
Controller
9
Air damper position
10 Motor housing
11 Wrench-adjustable cam rings
Fig. 17-2 Potentiometer SQN3..., view A
1
Potentiometer ASZ 12.603-12703
2
Cross-head screw
3
Bush with slotted screw
4
Motor housing
5
Control panel
6
Locking bolt
7
Marking arrow
8
Distance sleeve