Product Overview

VOG Series Oil Safety Shut-off Valves with Proof of Closure Installation Instructions
Document Number 129-464
March 16, 2009
Siemens Building Technologies, Inc. Page 3 of 7
Operation
The electro-hydraulic actuator consists of a cylinder filled with oil, a piston containing an
electric oscillating pump, and a relief system. When power is supplied to the actuator, the
relief system closes, and the pump moves the piston downward in the cylinder, opening
the oil valve. When power to the actuator is interrupted, the relief system opens and the oil
valve closes in less than one second.
A position indicator, visible through the transparent portion of the terminal cover, shows the
entire stroke range of the actuator. The oil valve only uses about 1/4-inch of the actuator’s
stroke. A light, which is visible through the lower left transparent portion of the terminal
cover, indicates when the actuator receives power. A non-adjustable SPDT POC over
travel switch signals the valve closed position after the oil valve has closed. If equipped, an
SPDT auxiliary switch changes state when the oil valve is more than 80% open.
Installation
WARNING:
• Personal injury or loss of life may occur if you do not follow procedures
as specified.
• All installations must be performed by qualified personnel only.
• DO NOT use the actuator as a wrench when piping the oil valve. If a large enough
force is applied to the actuator, the thermal barrier can be broken. ALWAYS use a
wrench on the provided valve body wrench flats when piping the oil valve.
• The actuator meets NEMA 4 requirements when mounted in the vertical position and
liquid tight conduit is used.
• The actuator has two knock-outs for the installation of 1/2”-14 NPSM conduit
connectors.
• Flexible conduit must be used. Hard conduit (EMT or Rigid Type) is not permitted.
• The VOG15 is shipped with three 3/4” NPT to 1/2” NPT bushings and one 3/4” NPT
plug. The bushings are included to adapt the valve ports to 1/2” NPT if necessary, and
the 3/4” NPT plug must be installed in the oil valve’s bottom port for two-way operation.
• Use suitable pipe thread sealant on all piping connections.
Wiring and Switches
(See Terminal
Designations)
• The actuator is equipped with spring-loaded terminals for 14 AWG wires.
• The terminal marked GND, located above the wiring terminals, must be connected to
the electrical ground.
• The two “L” terminals are interconnected and the two “N” terminals are interconnected.
The second “L” terminal and the second “N” terminal are intended as a convenient
wiring point for a second oil valve.
• Insert one wire into the opening of the terminal while pressing the lever downward with
a screwdriver or hard object. Make sure that all strands insert into the opening.
• Wiring must meet all relevant electrical codes.
NOTES: 1. The Auxiliary Switch is not adjustable. This switch changes state when the oil
valve is > 80% open.
2. The Auxiliary Switch must not be used for proof of closure detection or other
safety interlock functions.
3. The Proof of Closure Switch is non-adjustable.