Siemens SSC61.5U User manual

Installation Instructions

Document No. 129-253

August 2, 2007

SSC Series Electronic Valve Actuator

EA1157R1

Item Number 129-253-07, Rev. 013 Page 1 of 4

Product Description

The SSC series actuator requires a 24 Vac, Class 2

supply and provides a 0 to 10 Vdc or Floating (three-

position) control signal. The actuator controls a

Powermite 599 Series MT Series valve with a 7/32-

inch (5.5-mm) stroke.

Warning /Caution Notations

WARNING: Personal injury/loss of life may

occur if you do not perform a

procedure as specified.

CAUTION: Equipment damage may occur

if you do not follow a

procedure as specified.

Product Numbers

SSC61U 0 to 10 Vdc, proportional control,

non-spring return (fail-in-place)

SSC61.5U 0 to 10 Vdc, proportional control,

spring return (fail-safe)

SSC81U Floating control, non-spring return

(fail-in-place)

SSC81.5U Floating control, spring return

(fail-safe)

Contents

One SSC actuator

Estimated Installation Time

20 minutes

Required Tools

•Small Phillips head screwdriver

•Small flat-blade screwdriver

•Wire stripper

Prerequisites

WARNING:

1. If mounting the actuator to a valve already

in line, either close the shut-off in the

piping (upstream first, then downstream)

or switch off the pump to allow the

differential pressure in the valve to drop.

2. Disconnect the controller power before

replacing the actuator.

3. If high voltage cable is co-located with the

SSC actuator, conduit or shielded wire

may need to be used.

CAUTION:

Before applying power, make certain a valve is

connected to the actuator.

If applying power to the actuator when a valve is

not connected, the actuator will respond to a

control signal and the shaft will extend until it

reaches its maximum end stop. Thereafter, it will

not respond to any signal.

If this occurs, disconnect the power. Turn the

manual position indicator (Figures 4 and 9)on the

top of the actuator to the 0 position and verify the

actuator shaft retracts completely.

Connect a valve to the actuator, reapply the

power, and the actuator will return to normal

operation.

Mounting

The vertical position is recommended for mounting

the actuator (Figure 1).

EA0791R2

Figure 1.

Acceptable Actuator Mounting Positions.

Document No. 129-253

Installation Instructions

August 2, 2007

Page 2 of 4 Siemens Building Technologies, Inc.

Installation

If you are mounting an actuator on a new valve, begin with

the instructions Mounting an Actuator on a Valve.

Removing the actuator from a valve

1. Remove the terminal cover (Figure 2) using a Phillips

head screwdriver,

2. Identify and disconnect wiring from the terminals.

3. Remove wiring retention screw.

4. Do one of the following:

•Remove plenum cable adapter and plenum

cable; or

•Remove flex conduit.

5. Loosen the actuator coupling on the valve (Figure 3,

reverse #2).

6. Remove the actuator from the valve.

EA1154R1

WIRING TERMINAL

WITH REMOVABLE

TERMINAL BLOCK

TERMINAL

COVER

AND SCREWS

FLEX

CONDUIT

ADAPTER

PLENUM CABLE

ADAPTER

(OPTIONAL USE)

WIRING

RETENTION

SCREW

Figure 2. SSC Actuator Components.

Mounting an Actuator on a Valve

1. If you are attaching the actuator to a new valve,

remove the protective plastic cap from the valve

stem.

2. Turn the manual position indicator on the top of the

actuator to the 0 position (Figure 10).

3. Using a Phillips head screwdriver, remove the

terminal cover (Figure 2).

4. Remove wiring retention screw.

5. Remove plenum cable adapter.

6. For plenum applications, complete wiring as follows:

a. Route cable through plenum cable adapter so

there is sufficient cable to complete wiring

terminations.

b. Insert plenum cable adapter into flex conduit

adapter and secure in place with wiring retention

screw.

NOTE: Insert wiring retention screw in hole farthest from

wiring terminals. (The hole nearest the wiring

terminals is to secure the terminal cover in

place.)

c. Continue with Step 8.

7. For 3/8-inch flex conduit applications, complete

wiring as follows:

a. Discard plenum cable adapter.

b. Insert flex conduit into flex conduit adapter and

secure in place with wiring retention screw.

NOTE: Insert wiring retention screw in hole

farthest from wiring terminals. (The

hole nearest the wiring terminals is

to secure the terminal cover in

place.)

c. Route wiring through flex conduit for wiring

terminations.

8. Connect wires to wiring terminals per the Wiring

section of this document.

9. Secure the terminal cover in place over the wiring

terminals (Figure 2) using a Phillips head

screwdriver,

10. Place the actuator on the valve and firmly hand-

tighten (Figure 3).

CAUTION:

Hand-tighten the actuator to the valve. The

use of tools to tighten the assembly together,

will cause damage.

The installation is complete.

EA1160R1

Figure 3. Coupling Actuator to Valve.

Manual Override

To position the actuator manually, use the manual override

knob in the center of the position indicator (Figure 4).

CLOCKWISE

EXTENDS

SHAFT

COUNTER

CLOCKWISE

RETRACTS

SHAFT

EA1161R1

Figure 4. Manual Override.

Document No. 129-253

Installation Instructions

August 2, 2007

Siemens Building Technologies, Inc. Page 3 of 4

Calibration Stroke

The SSC Series writes its calibration stroke parameters to

nonvolatile memory on the first start-up of the actuator.

Successive start-ups bypass the calibration stroke unless

the memory is manually cleared. If installing the actuator

on a different valve (such as on a replacement valve),

manually clear the calibration stroke from memory as

follows:

1. Remove the terminal cover using a Phillips head

screwdriver.

2. Locate hole on the circuit board with the shorting

bars (Figure 5).

3. With power applied to the unit, insert and gently twist

a flat-blade screwdriver to electrically connect the

shorting bars. The SSC… then performs a new

calibration stroke.

4. Secure the terminal cover back in place.

EA1155R1

WIRING TERMINAL

WITH REMOVABLE

TERMINAL BLOCK

Shorting

Bars

TERMINAL

COVER

AND SCREWS

Figure 5. Manually Clearing Calibration Stroke from

SSC61U and SSC61.5U Nonvolatile Memory.

Wiring

•All wiring must conform to NEC and local codes

and regulations.

•Use earth ground isolating, step-down Class 2

transformers. Do not use autotransformers.

•Determine the supply transformer rating by

summing the total VA of all actuators used. The

maximum rating for a Class 2 step-down

transformer is 100 VA.

•Do not power more than 10 actuators with one

transformer.

NEUT

CONTROLLER ACTUATOR

EARTH GROUND

ISOLATING CLASS 2

TRANSFORMER FOR

24 Vac POWER

120 Vac

Vac

EA0795R1

Y2: Retracts actuator

shaft

Y1: Extends actuator shaft

G: System potential

Figure 6. SSC81U NSR Floating Control.

EA1235R1

NEUT

CONTROLLER

EARTH GROUND

ISOLATING CLASS 2

24 Vac TRANSFORMER

120 Vac

24 Vac

ACTUATOR

G, G0: 24 Vac

operating voltage

Y2: Retracts actuator shaft

Y1: Extends actuator shaft

G: System potential

G0: System neutral

Figure 7. SSC81.5U Floating Control SR

Hot-Switch.

CAUTION:

Terminals must be properly wired for

correct function and full life of the actuator.

EA1234R1

NEUT

CONTROLLER

EARTH GROUND

ISOLATING CLASS 2

24 Vac TRANSFORMER

120 Vac

24 Vac

ACTUATOR

G, G0: 24 Vac operating voltage

Y2: Retracts actuator shaft

Y1: Extends actuator shaft

G: System potential

G0: System neutral

Figure 8. SSC81.5U Floating Control SR Neutral

Switching Applications.

NOTE: For proper operation, it is recommended no

more than three actuators be assigned to any

single one control signal.

GR1

Vac

NEUT

ACTUATOR

EARTH GROUND

ISOLATING CLASS

TRANSFORMER FO

24Vac POWER

120Vac

ELECTRONIC

CONTROLLER

G, G0: 24 Vac operating voltage

Y: *0 to 10 Vdc control signal

G: System potential

G0: System neutral

R1: 500 ohm resistor

(optional for 0-20mA

operation)

Figure 9.

SSC61U, NSR and SC61.5U, SR,

0 to 10 Vdc Proportional Control Wiring Diagram.

*4 to 20 mA with optional

resistor

Document No. 129-253

Installation Instructions

August 2, 2007

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. Other product or company names mentioned herein may be the trademarks of their

Siemens Building Technologies, Inc.

1000 Deerfield Parkway

Buffalo Grove, IL 60089-4513

U.S.A.

Your feedback is important to us. If you have

comments about this document, please send

them to [email protected]

Document No. 129-253

Country of Origin: US

Page 4of 4

Start-up

Check the wiring and the position indicator (Figure 10).

Position

Indicator Output

Shaft

0 Retracted

1 Extended

NOTE:

"0" and "1" markings are

intended for reference only,

and not stroke

measurement.

EA1158R1

Figure 10. Position Indicator (Shown in 0 Position).

Troubleshooting

Check the wiring for the proper connections.

References

Technical Instructions Document No.

EA 599-15 Powermite 599 Series SSC

Electronic Valve Actuator 24 Vac

Proportional Control

155-313P25

EA 599-16 Powermite 599 Series SSC

Electronic Valve Actuator

3-position (Floating) Control

155-314P25

TB251, Powermite 599 Series, MT Series

Terminal Unit Valve and Actuator Assembly

Selection

155-306P25

Dimensions

(48)

4.4

(110.8)

3.5

(89.)

.85

(21.6)

4.5

(115.1) 5.5

(140.)

EA1159R1

Figure 11. SSC Actuator Dimensions in Inches (Millimeters).

Service Envelope

Minimum access space

recommended:

1. 8 inches (200 mm)

above the actuator.

2. 8 inches (200 mm)

beside the terminal

cover.

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