Siemens SKD62UA User manual

Installation Instructions
Document No. 129-369
October 16, 2002
SKD62UA Series Electronic Valve Actuator,
Advanced Features
Product Description
The SKD62UA electronic valve actuator requires a 24
Vac supply and receives a 0 to 10 Vdc or 4 to 20 mA
control signal to proportionally control a valve. These
actuators are designed to work with the Flowrite™
VF599 series valves, or other manufacturer's valves
with fitted with the appropriate Universal Valve Retrofit
Kit.
Product Numbers
SKD62UA
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 if you do not
follow a procedure as specified.
Required Tools
• 5 mm hex wrench
• Small and medium flat-blade screwdrivers
Expected Installation Time
20 minutes for factory installed actuator
45 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.
Mounting Positions
EA0921R1
Not allowed with the
Weather Shield
Not allowed in
any circumstance
Figure 1. Acceptable Mounting Positions.
Using the Weather Shield
The SKD62UA must be in the vertical position.
Complete instructions for the mounting of the weather
shield are included with that product.
NOTE: Use the top knockout position when installing
the Weather Shield. See Figure 13.
EA0857R1
VENTILATION
OPENINGS
VENTILATION
OPENINGS
Figure 2. Weather Shield Installation Position.
Item Code: 129-369, Rev. 011 Page 1 of 6

Document Number: 129-369
Installation Instructions
September 30, 2002
Installation
If you are mounting an actuator on a new valve, begin
with the instructions in Figure 3.
Removing the Actuator
from the Valve
1. Remove the actuator cover.
2. Disconnect the wires and conduit, if installed.
3. Loosen the valve stem retainer using a 5 mm hex
wrench and lower the valve stem into the valve.
4. Loosen the yoke nuts in the actuator yoke using a
5 mm hex wrench.
5. Remove the actuator from the valve, use care not
to damage the valve stem.
Continue with Mounting an Actuator to a Valve.
EA0134R1
Figure 3. Preparing a new Valve.
Mounting an Actuator to a Valve.
NOTE: Install the packing heating element,
(P/N 599-00417), if used, before proceeding.
EA0380R1
5 mm
≈3x360°
≈5 x 360°
«MAN«MAN
«
Figure 4.
NOTE: Make sure the yoke nuts are loose enough to
allow the actuator to slip over the bonnet.
See Figure 5.
EA0382R1
4
3
Figure 5.
EA0384R1
5 mm
5
Figure 6.
NOTE: Hold the stem retainer in place as you tighten
it around the valve stem. See Figure 6.
EA0383R2
5 mm
MAX. TORQUE
40 lb-in (4.5 Nm)
6
6
1Figure 7.
NOTE: Position the actuator to accommodate the
wiring. Hold the actuator in place while
tightening the yoke nuts. See Figure 7.
EA0381R1
>3x360°
«AUTO
«
2
7
Page 2 of 6 Siemens Building Technologies, Inc.
Figure 8.

Document Number: 129-369
Installation Instructions
September 30, 2002
Wiring
CAUTION:
Use care when removing the knockout.
Do not damage the circuit board.
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 power supply circuit is 100 VA.
Actuator Power
Consumption
Actuators per
Class 2 supply circuit*
(80% of transformer VA)
SKD62UA 17 VA 4
* Operating more actuators requires additional
transformers or separate 100 VA power supplies.
Wiring Diagrams
EA1077R1
LED Status
Indication
Stroke Calibration
Rotary Switches
LO and UP
Connection
Terminals
G0
AC 24V
50/60Hz 0 ... 10V
4 ... 20mA
G
G0
Chm
GYMUZ
OK
Green
Status
Calib.
Red
Calib.
Error
Valve
Jam
1 2 3 4
Figure 9. DIP Switches.
DIP Switches
(From Left to Right)
1
Select Direction
of Operation
2
Sequence Control
or
Stroke Limit Control
3
Selection of
Control
Signal
4
Selection of
Flow
Characteristic
ON Reverse-acting Sequence control 4 to 20 mA Modified*
OFF
(Factory Settings) Direct-acting Stroke limit control 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.
Calib. Status
Siemens Building Technologies, Inc. Page 3 of 6

Document Number: 129-369
Installation Instructions
September 30, 2002
GB1M
G0 Y1
GM Z
G0
YU
BM
G (SP)
F1
Y1
N1
B1
G0 (SN)
32
1
M
Sensor
Temperature Limiter
Controller
Actuator
B1
F1
N1
Y1
AC 24 V
EA1074R1
Figure 10.
Connecting Terminals
24 Vac
G System Potential (SP)
G0 System Neutral (SN)
Y Control Input: 0 to 10 Vdc or 4 to 20 mA
(DIP switch selectable)
Z Override Control
(See Technical Instructions 155-717)
M Measuring Neutral
U Output for 0 to 10 Vdc or 4 to 20 mA
measuring voltage. It will match the input
signal type.
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.
Start Up
• Check the wiring for proper connections.
• Consult the Technical Instructions 155-717 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.
The actuator must be mechanically connected to a
valve and must have a supply voltage of 24 Vac. The
calibration procedure can be repeated as often as
necessary.
To initiate the calibration procedure, short
circuit the contacts inside the slot located
on the printed circuit board (with a
screwdriver).
Automatic calibration proceeds as follows:
• Actuator runs to the 0 stroke position (1) the green
LED flashes .
• Actuator then runs to
the 100% stroke
position (2) the
green LED flashes.
0 %
1
2
3
y
100 %
Stroke
EA1066R1
• Measured values are
stored in the
EPROM.
• The actuator now moves to the position defined by
control signal Y or Z (3), and the green LED now
glows steady (normal operation)
• Throughout this procedure, output U is inactive,
meaning the values only represent actual positions
when the green LED stops flashing and remains
on continually.
Table 1. LED Status.
LED Display Function Action
ON Normal Operation Automatic operation
Green
Flashing Stroke calibration
In Progress
Wait for calibration to be
completed (LED stops
flashing)
ON
Faulty stroke
calibration
Internal Error
- Check mounting
- Restart stroke
calibration (by short-
circuiting calibration slot)
- Replace electronics
Flashing Inner valve jammed Check the valve
Red
OFF
• No power
supply
• Faulty
electronics
-Check mains
-Replace electronics
CAUTION:
Before starting calibration, be sure that the
manual adjuster is set to Automatic to
register the actuator values.
EA1065R1
Page 4 of 6 Siemens Building Technologies, Inc.

Document Number: 129-369
Installation Instructions
September 30, 2002
Normally Closed Valve
Actuator pressure cylinder moves:
• Outward (0 to 1): Valve opens.
• Inward (1 to 0): Valve closes.
Normally Open Valve
Actuator pressure cylinder moves:
• Outward (0 to 1): Valve closes.
• Inward (1 to 0): Valve opens.
Three-Way Valve
Actuator pressure cylinder moves:
• Outward: Valve opens between port NC and C.
• Inward: Valve opens between ports NO and C.
NOTE: The valve body assembly determines the
complete assembly action.
Manual Operation
EA1080R1
<< MAN >> << AUTO >>
<< AUTO >>
>3x360∞
1
0
0
1
0
0
1
0
1
0
1
0
1
EA0387R1
3/4 in.
(20mm)
Figure 11. Manual Override in Manual
and Automatic Position.
Each complete revolution (360°) is equal to 3/32-inch
(2.5 mm) stroke.
Reference
Technical Instruction
Document
Number
EA599-18 Flowrite 599 Series SKB/C/D
62UA Series Electronic Valve Actuator, 24
Vac Proportional Control Advanced Features
155-717
Figure 12. Valve Stem Travel Indication.
Dimensions
8-13/16
(224)
11-1/4
(285)
2-9/16
(65)
1-15/16
(49)
4-1/2
(114)
3/4
(19)
4-13/16
(122) 4-13/16
(122)
9-3/8
(232)
12-7/8
(327)
5
(126)
EA0854R1
Figure 13. 599-10071 Weather Shield
Dimensions in Inches (Millimeters).
Siemens Building Technologies, Inc. Page 5 of 6

Document Number: 129-369
Installation Instructions
September 30, 2002
Dimensions, Continued
CAUTION:
Use care when removing the knockout. Do
not damage the circuit board.
NOTE: Use the top knockout position when installing the
Weather Shield.
SERVICE ENVELOPE
MINIMUM ACCESS
SPACE RECOMMENDED
4 inch (100 mm)
8 inch (200 mm)
Figure 14. SKD62UA Dimensions in Inches (Millimeters).
2-1/2
(64)
2-5/8
(66)
Ø2-9/16
(65)
Ø1-3/4
(44)
4-1/8
(105) Ø5
(127)
5-5/8
(143)
KNOCKOUT
FOR STANDARD
1/2" CONDUIT
CONNECTOR
4-7/8
(123)
11-13/16
(300)
4-3/4
(120)
0
1
0
1
1
0
EA0385R1
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
Your feedback is important to us. If you have
comments about this document, please send
Buffalo Grove, IL 60089-4513
U.S.A.
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Page 6 of 6
Document No. 129-369.
Printed in the U.S.A.