Installation Instructions
Document No. 129-185 October 16, 2002
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 or a 1-1/2-inch (40 mm) stroke.
SKBx SKCx
3/4-inch (20 mm) stroke 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.
Not allowed in any circumstance EA0133R2
Product Numbers
Not allowed with the Weather Shield
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.
KNOCKOUT
•
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.
EA0739R1
Required Tools 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.
CAUTION: Do not damage or scratch the polished surface of the valve stem.
Item Number: 129-185-05, Rev. 011
Page 1 of 8
Document Number: 129-185 Installation Instructions September 30, 2002
Installation If you are mounting an actuator on a new valve, begin with the instructions in Figure 6.
Preparation for Mounting an Actuator on a Valve.
Removing the Actuator from the Valve
N
V1
V2
21
V1
V2
21
11
11
EA0134R1
N
2 3 1
0 1
EA0181R1
Figure 7. Preparing a New Valve.
NOTE: Install the packing heating element, if used, before proceeding to Figure 8.
EA0137R1
Figure 3.
4
0 1
1
0 1
EA0176R1
24 mm 24 mm
Figure 4.
Ø14 mm EA0136R1
EA0135R1
3
SAVE
2 Ø10 mm
0 1
3/8" (9.5 mm)
EA0180R1
6
Figure 8.
NOTE: Place the narrow opening end of the nut over the valve stem first.
5
Figure 5.
4 0 1
EA0179R1
8
9 7
Figure 6.
Page 2 of 8
Figure 9.
NOTE: Be careful not to break the washer.
Document Number: 129-185 Installation Instructions September 30, 2002
EA0140R1
5 Figure 10. 0 1
4 EA0143R1
FINGER 5TIGHTEN
Figure 14. EA0141R1
6
7
Figure 11.
NOTE: Install the packing heating element, (P/N 599-00418), if used, before proceeding.
EA0144R2
Mounting an Actuator to a Valve 0 1
6
6
3/8" (9.5 mm) MAX. TORQUE 40 lb-in (4.5 Nm)
7 Figure 15.
Position the actuator to accommodate the wiring. Hold the actuator in place while tightening the retaining clamp.
0 1
2 EA0138R1
3/8" (9.5 mm)
1 180°
1
EA0145R1
Figure 12.
Figure 16.
SKB 8 x 360° OR SKC 16 x 360°
2
SKB = 0 1
3
Figure 13.
32 EA0146R1
EA0142R1
SKC =
Figure 17.
Page 3 of 8
Document Number: 129-185 Installation Instructions September 30, 2002
Wiring CAUTION: Use care when removing the knockout. Do not damage the circuit board. If possible, use the top knockout position.
3 4 EA0147R1
Do not use autotransformers. 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 a Class 2 step-down transformer is 100 VA.
Figure 18.
Actuator
EA0148R1
5
Actuators Per Class 2 Supply Power Circuit* Consumption (80% of transformer VA)
SKB62U SKC62U SKB82.50U SKB82.51U SKC82.60U SKC82.61U
0 1
17 VA 28 VA 10 VA 15 VA 19 VA 20 VA
4 2 8 5 4 4
* Operating more actuators requires
24 mm
additional transformers or separate 100 VA power supplies.
Figure 19.
SKB 8 x 360° OR SKC 16 x 360° N
N
6
V1
V2
21
V1
V2
21
4 11
11
3
2
Figure 20.
EA0150R1
7
Figure 21.
Page 4 of 8
0 1
EA0152R1
EA0149R1
1
Figure 22.
•
Wiring for SKB/C62U is shown in Figures 22 and 23.
•
Wiring for SKB/C82…U is shown in Figures 24 through 26.
•
The position output signal U will switch from 0 to 10 Vdc to 4 to 20 mA when a 4 to 20 mA input signal is selected and used on the terminal.
Document Number: 129-185 Installation Instructions September 30, 2002
SKB/C62U
Wiring for SKB/C82...U Non-Spring Return SKB82.50U, SKC82.60U
Calib.
Connection Terminals G0 G Y M U Z
Status
AC 24V 50/60Hz
G 0 ... 10V G0 4 ... 20mA Chm
Green
Stroke Calibration
Red Calib.
Status
OK
CONTROLLER
Calib.
0 1
Y2
Error Valve Jam
Y1
LED Status Indication
G
DIP Switches Functions See Below
NEUT
24 Vac
1
EA0746R1
EA1068R1
EARTH GROUND ISOLATING CLASS 2 TRANSFORMER FOR 24 Vac POWER
2 Figure 23. SKB/C62U.
ON OFF (Factory Setting)
2
Selection of Control Signal
Selection of Flow Characteristic
4 to 20 mA
Modified*
0 to 10 Vdc
Default
*Changing the default setting will modify an equal percentage valve to a linear flow characteristic. When set to default, the flow characteristic is determined by the valve body.
Y1
EA0217R3
DIP Switches
1
11
120 Vac
Y2 100% 0%
Cm1
3
3
a b c 100% 0%
c1 4 5
G
c2 4 5
ASC9.3BCU
1000 ASZ7.3
Figure 25. Non-Spring Return.
G (SP) B1 M
B1
M
G0
Y
M
Connecting Terminals
3
N1
Y1 M
G
EA1074R1
2
AC 24 V
G
B
F1
1
U
Z
Y1
G0 G0 (SN)
B1 F1 N1 Y1
Sensor Temperature Limiter Controller Actuator
G Y1 Y2 Cm1 c1 c2 1000 Ω
System Potential 24 Vac (+) Downward movement of coupling piece (0 to 1) Upward movement of coupling piece (1 to 0) Limit switch for 100% stroke ASC9.3BCU double auxiliary switch ASC9.3BCU double auxiliary switch ASZ7.3 potentiometer
The diagram shows all possible connections. How many and which are used depend on the application.
Figure 24.
Connecting Terminals
Z
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)
M U
Measuring Neutral Position Indicator for 0 to 10 Vdc or 4 to 20 mA .
G Y1 Y2 21 11
EA0226R2
G G0 Y
Spring Return SKB82.51U and SKC82.61U
Figure 26.
Page 5 of 8
Document Number: 129-185 Installation Instructions September 30, 2002
Spring Return SKB82.51U and SKC82.61U continued 0 0 1
21 CONTROLLER Y2 Y1
Actuator pressure cylinder moves: • Outward (0 to 1): Valve closes. • Inward (1 to 0): Valve opens.
Three-Way Valve
24 Vac
Actuator pressure cylinder moves: • Outward: Valve opens between port NC and C. • Inward: Valve opens between ports NO and C.
EA0745R1
EARTH GROUND ISOLATING CLASS 2 TRANSFORMER FOR 24 Vac POWER
EA0225R3
N.O.
NOTE:
120 Vac
Y1
21
11
Y2 100% 0%
Cm1
G
Actuator pressure cylinder moves: • Outward (0 to 1): Valve opens. • Inward (1 to 0): Valve closes.
Normally Open Valve
G
NEUT
Normally Closed Valve
3
3
a b c 100% 0%
c1 4 5
c2 4 5
1000
ASC9.3BCU
ASZ7.3
Figure 27. Spring Return.
The valve body assembly determines the complete assembly action.
Reference Technical Instruction
Document Number
Flowrite EA599 Series SKB/C Electronic Valve Actuator Proportional Control
155-163P25
Flowrite EA599 Series SKB/C Electronic Valve Actuator 3position (Floating) Control
155-171P25
Connecting Terminals System Potential 24 Vac (+) System Neutral (SN) Downward movement of coupling piece (0 to 1) Upward movement of coupling piece (1 to 0) Limit switch for 100% stroke ASC9.3BCU double auxiliary switch ASC9.3BCU double auxiliary switch ASZ7.3 potentiometer
Manual Operation 180°
1
1 x 360°= 2mm
EA0161R1
G 21 Y1 Y2 Cm1 c1 c2 1000 Ω
EA0162R1
0 1
Start-up
Figure 28. Manual Operation.
Check the wiring for proper connections. Consult Technical Instructions for detailed commissioning instructions.
1 x 360°= 2mm
1
2
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.
Page 6 of 8
EA0160R1
For this purpose, the actuator must be mechanically connected to a valve and must have a supply voltage of 24 Vac. Repeat the calibration procedure as often as necessary. See Technical Instructions 155-163P25 for details.
0 1
Figure 29. Return to Automatic Operation.
Document Number: 129-185 Installation Instructions September 30, 2002
Manual Operation, continued SKB
SKC
0
ACTUATOR PRESSURE CYLINDER
0 1
1
11/2" 40mm
EA0155R1
3/4" 20mm
Figure 30. Valve Stem Travel Indication.
Dimensions
9" (228)
14" (335) 6" (152)
6" (152)
3-15/16" (99)
5" (127)
2-3/16" (55)
EA0800R1
16-1/2" (420)
Figure 31. SKB\C Weather Shield, 599-10065 in Inches (mm).
Page 7 of 8
Document Number: 129-185 Installation Instructions September 30, 2002
Dimensions, continued CAUTION: Be careful when removing the knockout. Do not damage the circuit board. Use the top knockout position.
1
0
5 (127) 51/2 (140) 31/2 (89)
31/2 (89)
Ø7 (178)
513/32 (137)
91/4 (235)
Ø
EA0177R1
KNOCKOUTS FOR STANDARD 1/2" CONDUIT CONNECTOR
143/4 (375)
24mm Ø 10 or 14mm
MINIMUM ACCESS SPACE REQUIRED
SKB/SKC
4 (100) 8 (200)
Ø 11/4 (44)
3 (76)
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. Flowrite is a trademark of Siemens Building Technologies, Inc. Other product or company names mentioned herein may be the trademarks of their respective owners. © 2002 Siemens Building Technologies, Inc. Siemens Building Technologies, Inc. 1000 Deerfield Parkway Buffalo Grove, IL 60089-4513 U.S.A.
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[email protected] Document No. 129-185 Printed in the U.S.A.
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