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The VGPS-evo is a gas pressure proving system with ventilation interlock and optional CO2 detection.
The system will check the ventilation is switched on and running before performing a down stream integrity
check ensuring gas tightness before use. It will close the gas solenoid valve in the event of a ventilation
failure, gas leak detected during test, low incoming gas pressure or if the emergency stop/fire alarm is
activated.
It is designed for use primarily in kitchens.
Product Dimensions 255mm x 180mm x 60mm
Before commencing installation please familiarise yourself to the equipment by reading the comprehensive
installation instructions. If in doubt then please call 0161 233 0600.
It is a statutory requirement that this safety system is installed and commissioned
A commissioning certificate must be issued to the end user along with instructions for the operation of the
equipment.
As the Manufacturer, Medem UK should commission this safety system whereupon a commissioning report
will be forwarded to the installing agent who should provide a copy to the end user.
At the point of our commissioning an individual serial number will be attached to the system along with a 24
hour help line number. Photos and all relevant information for the installation will then be stored on the
Medem site database to be accessed in the event of a call on the 24 hour help line. The warranty period for
the panel and sender unit will then be extended to Ten years.
VGPS-evo v4
Installation Instructions
to the satisfaction of the manufacturer.
Gas Pressure proving.
·
Ventilation interlock.
·
CO2 monitoring
·
Fan interlocking.
·
5 year warranty - 10 years when commissioned
·
VGPS-evo
342
features
v4
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Table of Contents
Related Manuals for Medem VGPS-evo
Summary of Contents for Medem VGPS-evo
- Page 1 Photos and all relevant information for the installation will then be stored on the Medem site database to be accessed in the event of a call on the 24 hour help line. The warranty period for...
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Page 2: System Description
The VPPS-evo v4 is a gas proving ventilation interlock system with optional CO2 detection. The VGPS-evo system comprises of a mains powered main control panel, and low voltage pressure sender unit (plus fitting kit). The pressure sender unit it mounted onto the gas valve (with the fitting kit) and transmits the gas pressure information back to the main panel in order to preform its integrity test. -
Page 3: Main Features
VGPS-evo v4 Main features Optional SELV BMS Relays Connections to panel: marked on board Earth connection terminals. Live & Neutral 230 volts supply from 3amp switched fuse spur. 230 volts out to gas solenoid valve. Mains rated BMS relay set using switch Remote emergency stop and thermal links, SELV, connect in series multiple buttons (requires a N/C circuit). -
Page 4: Relay Settings
It is not optional and must be connected, It is mounted to the gas solenoid valve inlet and outlet test ports using 8mm OD copper pipe. Use the appropriate Medem fitting kit to fit the control valve size (see page 12,13). -
Page 5: Option Switches
There are various option switches available on the system for accommodating some of the more common situations. There always needs to be careful consideration to risk when changing any of the default settings, Medem (UK) Ltd would always recommend an onsite risk assessment be carried out before any changes are implemented. -
Page 6: Further Settings
VGPS-evo v4 Further Settings 21. Fill and Prove Gas Fill Time. The Fill Time should be set such that there is sufficient time to fill an empty pipe work system to full / normal pressure while ensuring a minimum escape of gas where a leak exists. -
Page 7: Basic Connections
VGPS-evo v4 Schematic Basic connections Earth Connections not shown (13) Fire alarm connection Requires a N/C contact in the fire panel (6,7) Ventilation Interlock connections Addressable 4 wire 230v Supply AUX 1, 2 & 3 Gas detectors Mains Rated 3Amp Fused Spur... - Page 8 VGPS-evo v4 Schematic Fan Interlock Connections (9,10) 6 core low voltage +/- 12v Power S1 = Supply Fan N/C contact E1 = Extract Fan N/C contact Fan speed Fan live fans controls Supply Where using 3 phase fans interlock on a single phase...
- Page 9 Use terminals TB2 A & C Resetting (indicator bar) The stop buttons supplied by Medem are of a “Push Glass, key resettable” style, when activated a yellow indicator bar will show and the unit will require resetting using the key provided.
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Page 10: Gas Detection
Ensure that the protective cover labels (RED) are removed only after the completion of all building work and the system has been commissioned by the Medem engineer. The labels are required to be removed for the detectors to operate, but removal before the completion of works risks contaminating the sensor element. - Page 11 After installation a simple bump test can be performed by using an appropriate level test gas in order to check operation. Full testing and calibration checking takes place during a Medem commissioning. Detector Location information Detector location will vary dependant on the individual characteristics of the target gas that is being monitored for.
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Page 12: Direction Of Flow
Pressure Sender & VGPS-evo v4 Valve connection Direction of flow Ensure that the valve is correctly installed with regard to the direction of the flow of gas and that the Sender Unit is fitted the correct way round. (Note: there is no flow “through” the pressure sender unit, it is purely reading the pressures either side of the valve. -
Page 13: Fitting Kit
VGPS-evo v4 Fitting Kit Mounting details - Fitting kit WALL MOUNTING STRAP PRESSURE SENDER UNIT INLET PORT & OUTLET PORT Note: These ports could be side by side INLET PORT OUTLET PORT Note: If this port is blanked off, use port on base of valve. - Page 14 Check the operation of the electric contactor by pressing the ’Electric’ button on the panel lid to switch on and off. Notes. It is recommended that all systems are commissioned after installation by Medem UK. This will extend the warranty period from 5 years to 10 years and ensure the system is working as designed.
- Page 15 VGPS-evo v4 Messages In the event of any alert the system will always give a reason on screen as to the cause. Common messages you may receive are shown below with further explanation. If you require any help or if anything is unclear then please contact technical support on 0161 233 0600 Test fail check all appliances: The system has found an escape of gas, the most common cause is an open appliance.
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Page 16: Warranty
Where a warranty claim is made then, where appropriate, a written order to attend site must be provided to Medem UK A cost for labour and travel to site will be prepared as a quote. The cost must be included in the order.
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