Installation Instructions

ManualsBrandsSiemens ManualsControl ValvesSKC Electronic Spring Return Valve Actuator w/ 1-1/2" Stroke (24 VAC)

Document No. 129-185

September 24, 2018

SKB/C Electronic Valve Actuator

Item Number: 129-185-05, Rev. CA Page 1 of 9

Product Description

The SKB/C actuators require a 24 Vac supply signal to

control either a 3/4-inch (20 mm) or 1-1/2-inch

(40 mm) stroke valve. These actuators work with

Flowrite™ 599 Series valves with a 3/4-inch (20 mm)

stroke (SKB) or a 1-1/2-inch (40 mm) stroke (SKC).

Product Numbers

SKBx 3/4-inch (20 mm) stroke

SKCx 1-1/2-inch (40 mm) stroke

Warning/Caution Notations

WARNING:

Personal injury or loss of

life may occur if you do not

follow a procedure as

specified.

CAUTION:

Equipment damage, or

loss of data may occur you

do not follow a procedure

as specified.

Required Tools

• 24 mm open-end wrench

• 3/8-inch open-end wrench

• No. 1 Phillips or flat-blade screwdriver

• Small adjustable wrench

Expected Installation Time

20 minutes for factory-installed actuator

46 minutes for field replacement of actuator

Prerequisites

WARNING:

If mounting the actuator to a valve already in

line, either close the shut-off valves in the

piping (upstream first, then downstream) or

switch off the pump to allow the differential

and static pressure in the valve to drop.

CAUTION:

Do not damage or scratch the polished

surface of the valve stem.

Figure 1. Acceptable Mounting Positions.

The vertical position is required for mounting and is the

only position for the NEMA Type 3R rating with the

Weather Shield.

Figure 2. SKB\C Weather Shield.

Using the Weather Shield

The SKB/C actuator is UL listed to meet NEMA Type

3R requirements (a degree of protection against rain,

sleet, and damage from external ice formation) when

installed with the Weather Shield, product number

599-10065, and outdoor-rated conduit fittings. The

SKB/C must be in the vertical position. Complete

instructions for the mounting of the Weather Shield are

included with that product. See Figure 31 for Weather

Shield dimensions.

Summary of content (9 pages)

PAGE 1
Installation Instructions Document No. 129-185 September 24, 2018 SKB/C Electronic Valve Actuator Product Description The SKB/C actuators require a 24 Vac supply signal to control either a 3/4-inch (20 mm) or 1-1/2-inch (40 mm) stroke valve. These actuators work with Flowrite™ 599 Series valves with a 3/4-inch (20 mm) stroke (SKB) or a 1-1/2-inch (40 mm) stroke (SKC). Product Numbers SKBx SKCx 3/4-inch (20 mm) stroke 1-1/2-inch (40 mm) stroke Figure 1. Acceptable Mounting Positions.
PAGE 2
Document Number: 129-185 Installation Instructions September 24, 2018 Preparation for Mounting an Actuator on a Valve. Installation If you are mounting an actuator on a new valve, begin with the instructions in Figure 6. Removing the Actuator from the Valve Figure 7. Preparing a New Valve. NOTE: Install the stem heating element (P/N ASZ6.6), if used, before proceeding to Figure 8. Figure 3. Figure 4. Figure 8. NOTE: Place the narrow opening end of the nut over the valve stem first. Figure 5.
PAGE 3
Document Number: 129-185 Installation Instructions September 24, 2018 5 Figure 10. 6 Figure 14. Figure 11. Mounting an Actuator to a Valve NOTE: Install the stem heating element, (P/N ASZ6.6), if used, before proceeding. Figure 15. Position the actuator to accommodate the wiring. Hold the actuator in place while tightening the retaining clamp. Figure 12. Figure 16. 2 Figure 13. Figure 17. Siemens Industry, Inc.
PAGE 4
Document Number: 129-185 Installation Instructions September 24, 2018 Wiring CAUTION: Use care when removing the knockout. Do not damage the circuit board. If possible, use the top knockout position. Do not use autotransformers. Use earth ground isolating step-down Class 2 transformers. Figure 18. Determine supply transformer rating by summing total VA of all actuators used. The maximum rating for a Class 2 step-down transformer is 100 VA.
PAGE 5
Document Number: 129-185 Installation Instructions September 24, 2018 Connecting Terminals SKB/C62U G G0 Y Z M U 24 Vac System Potential (SP) System Neutral (SN) Control Input 0 to 10 Vdc or 4 to 20 mA (DIP switch selectable) Override Input (See Technical Instructions 155-163P25) Measuring Neutral Position Indicator for 0 to 10 Vdc or 4 to 20 mA . Non-Spring Return SKB82.50U, SKC82.60U 1 2 Figure 23. SKB/C62U.
PAGE 6
Document Number: 129-185 Installation Instructions September 24, 2018 Spring Return SKB82.51U and SKC82.61U Start-up Check the wiring for proper connections. Consult Technical Instructions for detailed commissioning instructions. Stroke Calibration To determine the stroke positions 0% and 100% in the valve, calibration is required when the valve/actuator are commissioned for the first time. Figure 26.
PAGE 7
Document Number: 129-185 Installation Instructions September 24, 2018 Manual Operation Figure 28. Manual Operation. Figure 29. Return to Automatic Operation. Figure 30. Valve Stem Travel Indication. Siemens Industry, Inc.
PAGE 8
Document Number: 129-185 Installation Instructions September 24, 2018 Dimensions Figure 31. SKB\C Weather Shield, 599-10065 in Inches (mm). Page 8 of 9 Siemens Industry, Inc.
PAGE 9
Document Number: 129-185 Installation Instructions September 24, 2018 Dimensions, continued CAUTION: Be careful when removing the knockout. Do not damage the circuit board. Use the top knockout position. Figure 32. SKB/SKC Dimensions in Inches (mm). Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as design improvements are introduced.