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

Figure 5.

EA0384R1

5 mm

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)

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

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

AC 24V

50/60Hz 0 ... 10V

4 ... 20mA

Chm

GYMUZ

Green

Status

Calib.

Red

Calib.

Error

Valve

Jam

1 2 3 4

Figure 9. DIP Switches.

DIP Switches

(From Left to Right)

Select Direction

of Operation

Sequence Control

Stroke Limit Control

Selection of

Control

Signal

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

G (SP)

G0 (SN)

Sensor

Temperature Limiter

Controller

Actuator

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 %

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)

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

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∞

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)

(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)

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

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.

them to [email protected]

Page 6 of 6

Document No. 129-369.

Printed in the U.S.A.

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