Siemens LMV5 Quick Start Manual page 19

SQM4x Actuators 2-3
The SQM4x actuators that are driven by the LMV5 come in three basic torques and running times
as described in the product offering. See Section 1-2.
Actuators can rotate clockwise or counterclockwise depending upon programming in the LMV5.
All actuators share the same mounting hole pattern. The SQM48.4 and SQM48.6 both have 14mm
keyed shafts, the SQM45's both have 10mm shafts, 291A9 is keyed, 295A9 is "D" shaped.
The actuator body should be rigidly attached to the driven valve or damper utilizing the supplied
mounting holes. The actuator shaft should be attached to the valve or damper via an SCC Inc.
robust, zero lash flexible coupling.
Shaft couplings are safety related, since a coupling failure could let the valve / damper spin freely of
the actuator. Brackets and couplings specifically designed to attach these actuators to valves
and dampers are available, and are highly recommended.
Please speak to a SCC Inc. sales representative concerning these brackets and couplings.
Please see Section 10-1 for specifications.
IMPORTANT: Coupling set screws should not be tightened on the valve / damper shaft until:
1) Actuators are addressed and rotations are set in the LMV5
2) Each actuator is verified to be at zero degrees (closed)
This verification should be done under:
Parameters & Display > Ratio Control > Gas/Oil Settings > Curve Parameters.
3) Each valve / damper is verified to be closed, thus matching the indicated actuator position.
LMV5 QSG Rev 4
Figure 2-3.1 SQM4x Dimensions (inches)
Sec 2 Pg 3 www.scccombustion.com