Data Sheet for Product

Flowrite 599 Series SKB/C Electronic Valve Actuator Technical Instructions
3-Position (Floating) Control Document Number 155-171P25
September 25, 2018
Siemens Industry, Inc. Page 7
Start-Up, Continued
CAUTION:
Do not attempt automatic operation of the actuator when the red scale
is visible.
Automatic Operation
Figure 10. The Manual Setting Knob in Manual and Automatic Position.
When returning to automatic control, you must turn the crank arm of the manual setting
knob counterclockwise until the red numbers disappear. It is essential that the window is
clear and the crank arm is snapped into position.
NOTE: It is possible to secure the manual override handle in place by inserting a
# 8 × 1-1/4 or M5 × 30 mm thread-forming screw through the handle.
Wiring
Do not use auto transformers. Use earth ground isolating step-down Class 2
transformers.
Determine supply transformer rating by summing total VA of all actuators used. The
maximum rating for Class 2 step-down transformer is 100 VA.
Actuator
Power
Consumption
Actuators per
Class 2 Supply Circuit*
(80% of transformer VA)
SKB82.50U
10 VA
8
SKB82.51U
15 VA
5
SKC82.60U
19 VA
4
SKC82.61U
20 VA
4
* Operating more actuators requires additional transformers or separate 100 VA power
supplies.