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.
© 2002 Siemens Building Technologies, Inc.
U.S.A.
Your feedback is important to us. If you have
comments about this document, please send
themto [e-mail]
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
1
L
2
N
GAS0016R1
1
L
2
N
34
AUX
56
IV
IV
IV
+-
0...100%
GAS0017R2
1
L
2
N
34
POC
56
IV
IV
GAS0024R2
1
L
2
N
3
AUX
4
POC
56
III
+-
0...100%
IV
GAS0025R2
IVIII
1
%
100
V2
V1
0
V1
2
N
3
V2
4
AUX
56
IV
III
+-
0...100%
IV
+-
0...100%
I
+-
0...100%
GAS0041R1
1
%
100
V2
V1
0
V1
2
N
3
V2
4
POC
56
III
+-
0...100%
IV
I
+-
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