Siemens SFP21/18 User manual

4865

Elctromotoric Actuators

for small valves VVP47.., VXP47.., VMP47..

SFP21/18

SFP71/18

•SFP21/18 AC 230 V operating voltage, 2-position control signal

•SFP71/18 AC 24 V operating voltage, 2-position control signal

•135 N positioning force

•Spring return

•Manual adjustment

•For direct mounting with union nut (no tools required)

•Integral 1.8 m connecting cable

•Auxiliary switch, type ASC2.1/18 (optional)

Use

The SFP21/18 and SFP71/18 actuators are used in conjunction with zone valves

VVP47.., VXP47.. and VMP47.., primarily in heating, ventilation, air conditioning and

refrigeration systems for water-based control of low-temperature hot water and cooling

water. The SFP.. actuators together with the 3-port valves VXP47.. are suitable for low

leakage change over applications.

Functions

The electric actuator requires an on/off controller (thermostat) to control the valve. If the

temperature of the medium deviates from the set-point, the controller output signal

causes the actuator to drive the valve open. When the temperature of the medium

reaches the set-point, the control signal is cut off and the valve closes again.

CA1N4865en

20.04.2011

Siemens Building Technologies

HVAC Products

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Siemens Building Technologies Elctromotoric Actuators CA1N4865en

HVAC Products 20.04.2011

Type summary

Prod. no. Operating voltage Positioning time Control signal Connecting cable

SFP21/18 AC 230 V

SFP71/18 AC 24 V 10 s 2-position 1.8 m

Prod. no. Description Switching point Switching capacity Connecting cable

ASC2.1/18 Auxiliary switch

open/closed At approx. 50% stroke AC 250 V / 3(2) A 1.8 m

Ordering

Actuators, valves and accessories are supplied separately. The actuator is supplied

with the AL50 ring.

See overview

Equipment combinations

Type code Valve type kvs PN class Data sheet

[m3/h]

VVP47.. 2-port valves 0.25...4.0

VXP47.. 3-port valves 0.25...4.0

VMP47.. 3-port valves with T-bypass 0.25...2.5

PN16 4847

Technical design / Mechanical design

The valve is opened electrically by the actuator and closed by spring force.

It incorporates a synchronous motor, a gear mechanism and a return spring.

The electric motor is overload-resistant and anti-locking, so that continuous operation is

possible. The maximum stroke is limited mechanically. The closing motion, by contrast,

includes an overrun for the gear mechanism. This protects the gear mechanism from

mechanical shock and increases service life.

The valve is connected by an 1.8 m cable, which is an integral part of the actuator.

Accessories

The optional auxiliary switch can be fitted to the actuator

with two screws.

It switches at a stroke of approx. 50 %.

•Valve actuator de-energized:

→Auxiliary switch open

•Voltage applied to valve actuator:

→Auxiliary switch closed (50 ... 100 % stroke)

•Manual adjuster locked into position

(approx. 90 % stroke):

→Auxiliary switch closed

01468

See "Technical data" for further information on the auxiliary switch, page 5.

Accessories

Example: Product number Stock number Designation Quantity

SFP71/18 SFP71/18 Electromotoric Actuators 2

ASC2.1/18 ASC2.1/18 Auxiliary Switch 1

Delivery

Rev. no.

ASC2.1/18

auxiliary switch

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Notes

The admissible temperatures (see "Technical data", page 5) must be observed.

•The actuator may be operated only with alternating current (AC 230 V for SFP21/18

and AC 24V for SFP71/18)

•Phase cut and pulse-width-modulated signals are not suitable.

•Recommended number of opening/closing operations: approx. 50 per day, with

200 heating or cooling days

Mounting instructions are enclosed with the packaging. Mount ring AL50 prior to

mounting the actuator onto V..P47.. valves.

85° 85°

•Check the wiring.

•Check the functioning of the actuator and of the auxiliary switch, if fitted.

The valve can be opened manually by use of a lever on the actuator. When the valve is

approximately 90% open this locks into position. When electrical operation is resumed,

the locking mechanism is released automatically.

Opening the valve manually Locking the lever into position at a

valve opening of approx. 90%

01600

01602

Releasing the lever manually

01601

Rotate lever as far as the mechanical stop, and release.

Engineering

Electrical connection

Caution

Mounting

Orientation

Commissioning

Operating

Manual adjustment

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Maintenance

•The actuators require no maintenance.

•In the event of a fault, the actuator can be replaced without removing the valve. The

operating voltage must be switched off during this process.

•The actuators cannot be repaired.

Disposal

The device contains electrical and electronic components and must 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 given for these applications is valid only when the valves are

used with the actuators described under "Equipment combinations", page 2.

The use of type SFP.. actuators with third-party valves invalidates any warranty

offered by Siemens Building Technologies / HVAC Products.

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HVAC Products 20.04.2011

Technical data

SFP21/18 SFP71/18

Power supply Operating voltage

Voltage tolerance

AC 230 V

±15%

AC 24 V

±20%

Frequency 50 Hz

Max. power consumption 9.8 VA

Fuse protection for incoming cable Max. 3 A (external)

Control Control signal On/off via temperature controller

Phase cut and pulse-width-modulated signals

are not suitable.

Opening/closing operations Recommended number: approx. 10 000 / year

(equivalent to approx. 50 per day)

Operating data Position with de-energized actuator

2-port valve (VVP47..)

3-port valve (VXP47.. and VMP47..)

A →AB closed

A →AB closed, B →AB open

Positioning time Opened by motor: 10 s

Closed by spring: 30…50 s

Nominal stroke 2.5 mm

Positioning force 135 N

Manual adjustment 0...90 %

Admissible temperature of

medium in the connected valve:

1...110 °C

Electrical connection Connecting cable (integral) 2-core, 1.8 mm

18 AWG (0.96 mm2)

Norms and Standards CE–conformity

to EMC directive

2004/108/EC

Immunity EN 61000-6-2 Industrial

Emissions EN 61000-6-3 Residential

Low Voltage Directive 2006/95/EC

Electrical safety EN 60730-1

Protection class to

EN 60730, Section 2.7 Class II Class III

Pollution degree to EN 60730, 2

Housing protection

Upright to horizontal

IP30 to EN 60529

Environmental compatibility ISO 14001 (Environment)

ISO 9001 (Quality)

SN 36350 (Environmentally compatible products)

RL 2002/95/EG (RoHS)

Dimensions / Weight Dimensions See "Dimensions", page 6

Weight

without auxiliary switch

with auxiliary switch

0.585 kg

0.692 kg

0.585 kg

0.692 kg

Materials Base-plate

Housing

Die-cast aluminum

Polycarbonate

Housing colors Base and cover Light gray, RAL7035

Auxiliary switch (optional) Switch type Changeover contact

Switching point at approx. 50 % stroke

Switching capacity AC 250 V 3 A resistive

2 A inductive

Connecting cable 3-core, 1.8 mm

18 AWG (0.96 mm2)

General ambient conditions Operation

EN 60721-3-3

Transport

EN 60721-3-2

Storage

EN 60721-3-2

Environmental conditions Class 3K3 Class 2K3 Class 2K3

Temperature +1 ... +50 °C –25 ... +70 °C –5 ... +50 °C

Humidity 5 ... 85 %rh < 95 %rh 5 ... 95 %rh

Connecting cable

Cable SFP21/18

AC 230 V

SFP71/18

AC 24 V

Cable color Connection Cable color Connection

Operating voltage Brown L Red G

2-core Blue N Black G0

Auxil. switch ASC2.1/18 Black / Red Input Black / Red Input

(optional) Black / Blue N/C contact Black / Blue N/C contact

3-core Black / Pink N/O contact Black / Pink N/O contact

Dimensions

All dimensions in mm

01466

79,7

112

01467

Actuators without

auxiliary switch

SFP21/18, SFP71/18

Actuators with

auxiliary switches

SFP21/18, SFP71/18

with ASC2.1/18

01687

106

79,7

112

01688

Revision numbers

Product number Valid from rev. no. Product number Valid from rev. no.

SFP21/18 H SFP71/18 H

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Siemens Building Technologies Elctromotoric Actuators CA1N4865en

2009-2011 Siemens Switzerland Ltd. Sub

ect to chan

HVAC Products 20.04.2011

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