Operation; Mounting And Installation - Siemens 599 Series Technical Instructions

SSA81U Electronic Valve Actuator
24 Vac Floating Control

Operation

Mounting and
Installation
Wiring
Siemens Industry, Inc.
The actuators can be driven manually to any position between 0 and 1 with a 3 mm hex
wrench. The control signal from the controller; however, will take priority over any
manual position.
Mount the actuator in one of the allowable positions shown in Figure 3.
NOTE: Vertical is the recommended position.
When mounting the actuator in a plenum, the proper cable must be attached to meet
local codes.
Allow 8-inches (200 mm) above the actuator and 8-inches (200 mm) behind the cable
for service.
Installation Instructions are included with the actuator.
•
Do not use autotransformers.
•
Use earth-ground isolating, step-down, Class 2, power supplies.
•
Determine supply transformer rating by summing total VA of all actuators used.
•
Use one transformer to power up to 10 actuators.
Figure 3. Mounting Position.
Figure 4. SSA81U Wiring Diagram.
Technical Instructions
Document Number 155-710
February 7, 2023
Page 3