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Siemens VGD4 series Operation Manual And Mounting Instructions

Double gas valve with 2 actuators
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Operation Manual and Mounting Instructions for a
VGD4/VRD4 double gas valve with 2 SKPx5
actuators
Β
CC1U7643en
14.03.2018
Note!
The combination of a VGD4/VRD4 double gas valve with a QPLx5 pressure switch
and SKPx5 actuator does not require any maintenance.
Caution!
This document is intended for end users. All legal, safety, warning, and
technical notes contained in the data sheets for the SKPx5 actuator (N7643),
VGD4 double gas valve (N7631), VRD4 double gas valve for biogases and
recycling gases (N7649), and the QPLx5 pressure switch (N7221) are also
applicable!
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  Summary of Contents for Siemens VGD4 series

  • Page 1 Operation Manual and Mounting Instructions for a VGD4/VRD4 double gas valve with 2 SKPx5 actuators Β Note! The combination of a VGD4/VRD4 double gas valve with a QPLx5 pressure switch and SKPx5 actuator does not require any maintenance. Caution! This document is intended for end users. All legal, safety, warning, and technical notes contained in the data sheets for the SKPx5 actuator (N7643), VGD4 double gas valve (N7631), VRD4 double gas valve for biogases and recycling gases (N7649), and the QPLx5 pressure switch (N7221) are also...
  • Page 2 The combination of the SKPx5 actuator and VGD4/VRD4 double gas valve takes on the functions of a ∂ Safety shutoff valve (SKP15) ∂ Safety shutoff valve with specific pressure control (SKP25) 1.1 SKP15 actuator The electrohydraulically operated SKP15 gas fittings together with VGD4/VRD4 work exclusively as a safety shutoff valve (OPEN/CLOSED) and are used primarily on gas- fired combustion plant.
  • Page 3: Application Example

    1.3 Application example 3/17 Building Technologies Operation Manual and Mounting Instructions VGD4 / VRD4 / SKPx5 CC1U7643en 14.03.2018...
  • Page 4 Description of the SKPx5 actuators Operating mode display Valve stroke display The valve stroke display indicates the relative valve stroke. Depending on the tolerance limits, the fully closed position of the valve may vary. The maximum achievable valve stroke with a fully open valve seat varies according to the type and size of the valve: From 12 mm to 25 mm.
  • Page 5: Electrical Connection

    2.1 Electrical connection 120 V~/230 V~ activation of the SKPx5 actuator   Potential-free end switch (indicating the fully closed position) only with the SKPx5.xx1xx actuator Closed valve 7643z76en/1017 For all types 7643z77en/1017 5/17 Building Technologies Operation Manual and Mounting Instructions VGD4 / VRD4 / SKPx5 CC1U7643en 14.03.2018...
  • Page 6 2.2 SKP15 actuator • Valve stroke display ‚ Indication of operating state (LED) ƒ Power supply „ End switch (valve CLOSED) 7643z73/0817 Β Service note! No spare parts are available for the SKP15 actuator (security regulating unit). The entire actuator can only be replaced by contacting the burner manufacturer. 6/17 Building Technologies Operation Manual and Mounting Instructions VGD4 / VRD4 / SKPx5...
  • Page 7 2.3 SKP25 actuator • Valve stroke display ‚ Indication of operating state (LED) ƒ Power supply „ End switch (valve CLOSED) … Setpoint spring setting Vent opening / † Assembly of the AGA25.2 damping throttle ‡ Gas connection 7643z79/0817 Control pressure Β...
  • Page 8: Mounting Position

    2.4 Description of the VGD4/VRD4 double gas valve Work on the VGD4/VRD4 double Maximum operating pressure gas valve may only be carried out Pmax = 100 kPa DN 40/50 by qualified personnel. Pmax = 70 kPa DN 65…150 mbar Ambient temperature Valve 1 + Valve 2, Class A, Group 2 -15...+60°C according to EN 161...
  • Page 9 2.7 Installation dimensions for the VGD4 double gas valve with SKPx5 actuator 7643z70/0318 SKP15 SKP25 Type VGD40.040 / L VRD40.040 VGD40.050 / L VRD40.050 VGD40.065 / L VRD40.065 VGD40.080 / L VRD40.080 VGD40.100 / L VRD40.100 VGD40.125 / L VRD40.125 VGD40.150 / L VRD40.150 VGD41.040...
  • Page 10: Pressure Connections

    2.8 Pressure connections VGD40/VRD40 VGD40/VRD40 Pressure switch connecting Pilot gas connecting plate Pressure switch connecting plate (mounted on both plate AGA40.41 sides) AGA40.40 VGD41 VGD41 Mounting surface of the QPLx5 pressure switch Pressure connection for the QPLx5 pressure switch Β Note! Remove M4 locking screws as required.
  • Page 11 Description of the mountable QPLx5 pressure switches The QPLx5 pressure switch is designed to monitor the gas pressure. When the pressure falls below or exceeds the adjusted switching point, the respective electrical circuit will be opened or changes over. Caution! Service note! The QPLx5 also has to be replaced when replacing a valve.
  • Page 12 Attachment options QPL15 QPL15 QPL15 3x pressure switches (2x pm, pi) Example (not binding) Example (not binding) Valve proving control "A" Valve proving control "B" and pressure switch QPL15 (pi) below Inlet pressure pm (pvps) Pressure between valve V1/V2 Outlet pressure for valve V2 12/17 Building Technologies Operation Manual and Mounting Instructions VGD4 / VRD4 / SKPx5...
  • Page 13: Connection Diagram

    Connection diagram 4.1 Function as a minimum/maximum pressure switch Minimum pressure switch Maximum pressure switch When the pressure falls below the set When the pressure exceeds the set value, value, NO opens and NC closes NC opens and NO closes 4.2 Connection via connector AGA65 according to DIN 43650 13/17...
  • Page 14: Technical Data

    Technical data 5.1 SKPx5 actuator Environmental Operation DIN EN 60721-3-3 conditions Climatic conditions Class 3K3 Mechanical conditions Class 3M3 Temperature range -10…+60°C (longer opening times below 0°C) -20…+60°C (with heating element AGA63.5A27) ↑ SKP25.2 -10…+50°C (restricted operating conditions Humidity <95% r.h. Installation altitude Max.
  • Page 15: Spare Parts And Accessories

    Spare parts and accessories Please note the different article numbers for the VGD4/VRD4 double gas valves and the SKPx5 actuator when ordering spare parts. Article no Type Adapter plug For powering both SKPx5 actuators on the BPZ:AGA62.000A000 AGA62.000A000 VGD4/VRD4 double gas valve with an AGA64 connector.
  • Page 16 Article no Type Setpoint spring (yellow/gold) for SKP25 actuator ∂ Optional for built-in standard spring AGA29 ∂ 1.5…12 kPa for SKP25.0 actuator BPZ:AGA22 AGA22 ∂ 7…70 kPa for SKP25.4 actuator (optionally for AGA23 setpoint spring) ∂ Ø 1.6 mm Setpoint spring (red) for SKP25 actuator ∂...
  • Page 17 Double gas valve (without valve proving EN 126 50,000…200,000 system) EN 161 Siemens AG Building Technologies © 2018 Siemens AG Building Technologies Berliner Ring 23 Subject to change! 76437 Rastatt, Germany Tel. +49 7222 598 279 Fax +49 7222 598 269 www.siemens.com...