Siemens SKP Series Owner's manual

Siemens Building Technologies, Inc.



SKP Series

Technical Instructions

Document No. 155-513P25

SKP10…U..

Rev. 3, July, 2002

SKP10…U.. Electro-hydraulic

Actuators with Safety Shutoff Function

For Use With Gas Valves VG…

Description SKP10… Electro-hydraulic actuators are used in combination with VG… series gas

valves to provide safety shutoff control for industrial and commercial burner

applications.

The compact SKP10 actuator opens slowly and closes rapidly upon interruption of

power. The two-stage models provide adjustable low and high fire control. The modular

design allows the SKP10… to be used in combination with all VG… series gas valves

from 1/2-inch to 6-inch size. The actuator is easily mounted on the square flange of any

VG… valve with the four bolts contained in the terminal box of the actuator (under

the green cover). No gaskets or seals are required when mounting the actuator. The

valve position is shown by a visible position indicator displaying the entire stroke range

of the actuator.

Features • UL listed, FM approved, CSA certified for the United States and Canada, IRI

approvable, ISO 9001 certified; European, Australian and Japanese approved

versions available.

• Proof of Closure-Over Travel (POC-OT) versions available.

• Visual stroke indication.

• Optional auxiliary switches available.

• Modular construction allows 360orotation of actuator for easy field wiring and

installation.

• Low, 23 VA power consumption.

Application SKP10… series actuators may be combined with 1/2-inch to 6-inch VG… series gas

valve bodies. VG… series gas valves are ordered separately (See VG…U.. Technical

Instructions No. 155-512P25).

Technical Instructions SKP10…U.. Electro-hydraulic Actuators

Document No. 155-513P25

Rev. 3, July, 2002

Page 2 Siemens Building Technologies, Inc.

Product Numbers Table 1.

Product Number Operating

Mode Operating

Voltage Proof of Closure-Over

Travel

& Auxiliary Switch

Type of

Switch

SKP10.110U17 On-Off 110 – 120 Vac No —

SKP10.111U17 On-Off 110 – 120 Vac Auxiliary SPDT

SKP10.191U17 On-Off 110 – 120 Vac Proof of Closure-Over Travel SPDT

SKP10.192U17 On-Off 110 – 120 Vac Proof of Closure-Over Travel

& Auxiliary SPST

SPST

SKP10.110U27 On-Off 220 – 240 Vac No —

SKP10.111U27 On-Off 220 – 240 Vac Auxiliary SPDT

SKP10.192U27 On-Off 220 – 240 Vac Proof of Closure-Over Travel

& Auxiliary SPST

SPST

SKP10.123U17 Two-stage 110 – 120 Vac Auxiliary SPDT

SKP10.923U17 Two-stage 110 – 120 Vac Proof of Closure-Over Travel SPDT

Specifications

Agency approvals

As safety shut-off valve UL/429, FM/7400, ANSI Z21.21/GCA6.5C/I

in combination with VG…U.. series gas

valves

Power supply Operating voltage 110 to 120 Vac + 10%-15%

220 to 240 Vac + 10%-15%

Operating frequency 50 to 60 Hz + 6%

Power consumption 23 VA

Duty cycle 100%

Operating environment Ambient operating temperature 15°F to 140oF (-10°C to 60oC)

Mounting position Optional, but not upside down

Physical characteristics Weight 2.75 lb (1.25 kg)

Enclosure NEMA 1, 2, 5 and 12

Dimensions See Figure 2

Specification for valves See VG Series Gas Valves Technical

Instructions

No. 155-512P25

Connections Conduit connection 1/2-inch NPSM adapter

Operating

characteristics Output force 100 lb (450 N)

Maximum stroke 0.7-inch (18 mm)

Opening time Varies with valve size, 12 seconds for

maximum stroke

Closing time <0.8 second

Auxiliary features Proof of closure-over travel switch Non-adjustable

Setting range of auxiliary switch Full stroke

Switch rating 6(3)A, 250 Vac

Two-stage control Setting range of first stage 0 to 100% of stroke

Setting range of second stage 0 to 100% of stroke

SKP10…U Electro-hydraulic Actuators Technical Instructions

Document No. 155-513P25

Rev. 3, July, 2002

Siemens Building Technologies Page 

Operation

Figure 1. SKP10…U.. Operation.

The electro-hydraulic actuator consists of a cylinder filled with oil and a piston

containing an electric oscillating pump. When power is supplied to the actuator, the

pump moves oil from the reservoir into the pressure chamber. This action causes the

piston to move downward in the cylinder, opening the gas valve. When power to the

pump is interrupted, the valve closes in less than 0.8 seconds.

A visible disk fitted to the pump shaft indicates the entire stroke range of the actuator.

This disk also operates optional auxiliary switches via a set of levers. The switching

position of the auxiliary switch is adjustable over the entire stroke. The proof of closure

switch is non-adjustable.

Installation

WARNING:

All installations must be carried out by qualified personnel only.

The SKP10… actuator is directly coupled to the VG… series valve body by four bolts,

contained in the terminal box of the actuator (under the green cover). The square

mounting flange can be rotated in steps of 90oto provide four different mounting

positions. The actuator should be mounted so that the stroke position indicator is

visible.

The SKP10… actuator can be mounted in any position except upside down. The

actuator can be mounted or replaced while the gas valve is under pressure. The

actuator packing contains an electrical conduit adapter to match the 1/2-inch NPSM

conduit. If the actuator is equipped with an auxiliary or proof of closure switch, two

adapters are included.

NOTE: Wiring must conform to local electrical codes.

Wiring and Switch

Adjustment

Auxiliary and Proof of

Closure Switch

Adjust the auxiliary switch (if provided) according to the wiring diagram located on the

label affixed to the actuator's side. (Also see Terminal Designations.)

NOTES: 1. The auxiliary switch must not be used for proof of closure detection or

other interlock functions.

2. The Proof of Closure Switch is non-adjustable.

Technical Instructions SKP10…U.. Electro-hydraulic Actuators

Document No. 155-513P25

Rev. 3, July, 2002

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 respective owners.

U.S.A.

Your feedback is important to us. If you have

comments about this document, please send

themto technical.editor@peconet.com

Document No. 155-513P25

Printed in the U.S.A.

Page 4

Two-stage control See the wiring diagram located on the label affixed to the actuator’s side.

Connect the low fire power supply to Terminal 1, neutral to Terminal 2 and high fire

power supply to Terminal 3.

Adjust the low fire and high fire positions according to the wiring diagram located on the

label affixed to the actuator’s side. (Also see Terminal Designations.)

Service There are no serviceable parts on the SKP10… Series actuators. If inoperative, replace

the actuator. Tag wires before replacing.

Terminal

Designations

GAS0016R1

AUX

0...100%

GAS0017R2

POC

GAS0024R2

AUX

POC

III

0...100%

GAS0025R2

IVIII

100

AUX

III

0...100%

GAS0041R1

100

POC

III

0...100%

GAS0042R1

SKP10.110U SKP10.111U.. SKP10.191U.. SKP10.192U.. SKP10.123U SKP10.923U

Dimensions

(Dimensions in inches;

millimeters in

parentheses)

Figure 2. SKP10…U.. Dimensions.

Represented By:

POWER EQUIPMENT COMPANY

2011 Williamsburg Road

Richmond, VA 23231

Ph. 804-236-3800

Fx. 804-236-3882

www.peconet.com

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