Siemens SSC31 User manual

CA1N4895en

08.03.2004

Siemens Building Technologies

HVAC Products

4895

Electrical Actuators

for valves VVP45..., VXP45..., VMP45...

SSC31

SSC81

SSC61...

• SSC31 operating voltage AC 230 V 3-position control signal

• SSC81 operating voltage AC 24 V 3-position control signal

• SSC61 operating voltage AC/DC 24 V DC 0…10 V control signal

• SSC61.5 same as SSC61, plus electrical fail-safe function

• Nominal force 300 N

• Automatic identification of valve stroke

• Direct mounting with coupling nut, no tools required

• Cable connection via screw terminals

• Manual override, indication of position and direction of travel

• Parallel connection of multiple actuators

• Special UL-listed versions

Use

For operation of Siemens valves of the VVP45..., VXP45... and VMP45... range for

water-side control of hot water and cooling water in heating, ventilation and air

conditioning systems.

In conjunction with the ASK30 mounting kit, the former Landis & Gyr valves VVG45...,

VXG45... and X3i... can also be operated.

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HVAC Products 08.03.2004

Type summary

Type reference Rated voltage Running time at 50 Hz Control signal Remarks

SSC31 AC 230 V 150 s 3-position

SSC81 AC 24 V

SSC61 AC/DC 24 V 30 s DC 0...10 V

SSC61.5 With fail-safe function

Type reference Rated voltage Running time at 50 Hz Control signal Remarks

SSC81U AC 24 V 150 s 3-position

SSC81.5U 125 s With fail-safe function

SSC61U AC/DC 24 V 30 s DC 0...10 V

SSC61.5U With fail-safe function

Type reference Description

ASK30 Mounting kit for use with former Landis & Gyr valves VVG45…, VXG45… and X3i...

When ordering, please give quantity, product name and type reference.

2 actuators SSC81

The actuators, valves and accessories are packed separately.

Equipment combinations

Type reference Type of valve kvs

[m3/h]

PN class Data Sheet

VVP45... 2-port valves 0.25...25 PN16 N4845

VXP45... 3-port valves

VMP45... 3-port valves with T-bypass 0.25...4

VVG45...1) 2-port valves 0.63...25

VXG45...1) 3-port valves

X3i...1) 3-port valves 0.7...14

Retrofitting to

former L&G

valves

1) With ASK30 mounting kit

Function / mechanical design

When the actuator is driven by a 3-position or DC 0…10 V control signal, it generates a

stroke which is transmitted to the valve stem.

• Voltage at Y1: Actuator stem extends and valve opens

• Voltage at Y2: Actuator stem retracts and valve closes

• No voltage at Y1 or Y2: Actuator maintains the current position

• The valve opens / closes in proportion to the control signal at Y

• At DC 0 V, the valve is fully closed (A →AB)

• In the event of a power failure, the actuator maintains its current position

Standard versions

Special UL-listed

versions

Accessories

Ordering

Example

Delivery

3-position actuators

SSC31 / SSC81

DC 0...10 V control

SSC61

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Siemens Building Technologies Electrical Actuators CA1N4895en

HVAC Products 08.03.2004

When first connected to power, or

after a power failure, the capacitor

which stores energy for the fail-safe

function will be charged. This process

takes up to 180 seconds. While the

capacitor is being charged, the

actuator cannot respond to any Y

control signals.

max 180 s max

30 s

Charging

Calibration Discharge

4895Z01en

Stroke [%]

100

60 s Normal

actuator

operation

On completion of the charging process and auto calibration (see below), the "Open"

and "Close" travel are proportional to the DC 0…10 V control signal.

In the event of a power failure of more than 5 seconds, the actuator will return

mechanically to its 0 % stroke position within 30 seconds, closing the valve

(A →AB).

When the AC / DC 24 V supply is applied for the first time, the actuators calibrate

themselves independent of the control signal. In this process, the actuator drives the

valve to the mechanical end stops and stores the associated positions permanently in the

form of electronic values. The positioning signal is only active on completion of this

calibration process. Calibration takes about 60 seconds.

The SSC61.5 only performs auto calibration when the charging process of 180 seconds

is completed.

If the calibrated actuator is used with

some other valve (e.g. a replacement

valve), it must be recalibrated. For that

purpose, the PCB beneath the terminal

cover has a slot (see illustration). To

make the recalibration, use a

screwdriver and connect the 2 contacts

behind the slot for about 1 second.

4895Z02

The calibration can only be made correctly if the actuator is fitted to a valve (refer to

«Equipment combinations»).

• Plastic cover

• Locking-proof, maintenance-free gear train

• Manual adjustment with rotary knob

• Reduced power consumption in the holding positions

• Load-dependent switch-off in the event of overload and in stroke limit positions

Accessories

Type ASK30

Electrical fail-safe

function

SSC61.5

Auto calibration

SSC61 and SSC61.5

Recalibration

Features and benefits

Mounting kit

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HVAC Products 08.03.2004

Notes

The actuators must be electrically connected in accordance with local regulations (refer

to «Connection diagrams»).

Regulations and requirements to ensure the safety of people and property must

be observed at all times!

The permissible temperatures must be observed (refer to «Technical data»).

Mounting Instructions 74 319 0260 0 are enclosed with each pack.

Assembly is made with the coupling nut; no tools or adjustments are required. The

actuators should be installed so that they are initially in position 0 (also refer to

«Operation»).

90° 90°

4899Z03

When commissioning the system, check wiring and the functions of the actuator.

Before testing the functioning of the SSC..., always check to ensure that the

actuator concerned is mounted on a valve (refer to «Equipment combinations»).

Calibrating the SSC61 or SSC61.5 without a valve connected causes the actuator to

lock in position 1. To recalibrate (after mounting on a valve), disconnect power and

reset the stroke manually from position 1 to 0 (refer to «Recalibration»).

The rotary knob can be used to drive the actuator into any position between 0 and 1.

However, if a control signal from the controller is present, this will take priority in

determining the position.

To retain the manually set position, unplug the connecting cable. Due to the reset

function, the SSC61.5 will first travel to position 0 and can then be driven manually to the

required position.

B (Y2)(Y, Y1) A

4895Z04

4895Z05

Position indicator in

position 1 = OPEN

4895Z06

Position indicator in

position 0 = CLOSED

Engineering

Caution

Mounting

Orientation

Commissioning

Caution

Operation

Note

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HVAC Products 08.03.2004

When servicing the actuator:

• Switch off power

• If necessary, disconnect the terminals

• The actuator must only be commissioned with a correctly mounted valve in place!

The SSC... actuators cannot be repaired. They must be replaced as a complete unit.

Disposal

The device may not be disposed of together with domestic waste. This applies in

particular to the PCB.

Legislation may demand special handling of certain components, or it may be sensible

from an ecological point of view.

Current local legislation must be observed.

Warranty

The technical data (∆pmax, ∆ps, leakage rates, noise levels, service life, etc.) relating to

specific applications are valid only in conjunction with the Siemens valves listed in this

Data Sheet under «Equipment combinations».

The use of the SSC… actuators in conjunction with third-party valves invalidates

any warranty offered by Siemens Building Technologies / HVAC Products.

Technical data

SSC31 SSC81 SSC61 SSC61.5

AC 24 V or DC 24 VPower supply

Rated voltage

Voltage tolerance

AC 230 V

± 15 %

AC 24 V

± 20 % ± 20 % ± 25 %

Rated frequency 50 / 60 Hz

Max. power consumption 6 VA 0.8 VA 2 VA 2 VA 1)

Fuse for incoming cable (fast) 2 A

Control Control signal 3-position DC 0...10 V

Input impedance for DC 0...10 V ––– > 100 kOhm

Positioning accuracy for DC 0...10 V ––– < 2 % of nominal stroke

Parallel operation

(number of actuators) 3)

max. 10

Functional data Running time for 5.5 mm stroke 150 s ± 2 % 30 s ± 10 %

Capacitor charging time ––– max. 180 s

Fail-safe run time ––– 30 s

Nominal stroke 5.5 mm

Nominal force > 300 N

Permissible temperature of

medium in the connected valve

1...110 °C

Electrical connections Terminal block, pluggable screw terminals for max. 3 mm2

Terminal block color green grey red red

Cable strain relief for cables 4...11 mm dia.

Industry standards Meets the requirements for CE

marking:

EMC directive

Low-voltage directive

UL approval 2)

CUL approval 2)

89/336/EEC emissions EN 50081-1

immunity EN 61000-6-2

73/23/EEC EN 60730-1

UL873-listed

certified to Canadian Standard C22.2 No. 24-93

Safety class II III

Housing protection standard IP40 to EN 60529

Maintenance

Repair

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Siemens Building Technologies Electrical Actuators CA1N4895en

HVAC Products 08.03.2004

SSC31 SSC81 SSC61 SSC61.5

Dimensions / weight Dimensions refer to «Dimensions»

Coupling thread to valve coupling nut G¾

Weight 0.26 kg 0.25 kg 0.27 kg

Housing Base, rotary knob

Cover

plastic, RAL 7035, light-grey

plastic, RAL 5014, pigeon-blue

1) 3 VA, when capacitor charged for automatic reset

2) Applies to type SSC… actuators with type suffix U

3) Provided the controllers’ output is sufficient

General

ambient conditions

Operation

IEC 721-3-3

Transport

IEC 721-3-2

Storage

IEC 721-3-1

Environmental conditions class 3K3 class 2K3 class 1K3

Temperature +5...+50 °C –25...+70 °C –25...+70 °C

Humidity 5...95 % r.h. < 95 % r.h. 5...95 % r.h.

Connection terminals

All actuators must be electrically connected and installed in accordance with local

safety regulations.

4895Z06

Control signal CLOSE (AC 230 V)

Control signal OPEN (AC 230 V)

Neutral

4864Z15

Control signal CLOSE

Control signal OPEN

System potential AC 24 V

4895Z21

Control signal DC 0...10 V

System potential AC 24 V (+ with DC 24 V)

System neutral (- with DC 24 V)

SSC31

SSC81

SSC61

SSC61.5

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Siemens Building Technologies Electrical Actuators CA1N4895en

HVAC Products 08.03.2004

Connection diagrams

N Controller

Y Actuator

L System potential AC 230 V

N System neutral

4864A01

(L)

(N)

AC 230 V

2AF

(Y1) (Y2)

Q1 Q2

Q1, Q2 Controller contacts

N Controller

Y Actuator

SP System potential AC 24 V

SN System neutral

4864A02

(Y1)

(G)

(G0)

AC 24 V

Y2Y1

(Y2) N

Q1 Q2

2AF

Q1, Q2 Controller contacts

N Controller

Y Actuator

SP System potential AC 24 V

4864A03

(Y) N

(G0)

SP (+)

SN (-)

AC 24 V (DC 24 V)

(G)

2AF

SN System neutral

SSC31

SSC81

SSC61

SSC61.5

8/8

Siemens Building Technologies Electrical Actuators CA1N4895en

HVAC Products 08.03.2004

Dimensions

All dimensions in mm

110.8

89.2

21.6

115.1

132.5

4895Z08

G¾

2004 Siemens Buildin

Technolo

ies AG Sub

ect to chan

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