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The SEC-B v5 is a gas pressure proving system with options for; electric isolation, gas detection and
ventilation interlocking.
The system will perform a down stream integrity check ensuring gas tightness before use, close the gas
solenoid valve in the event of; a high-level gas alarm, low incoming gas pressure or if the emergency stop/
fire alarm is activated.
It is designed for use primarily in boiler rooms.
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
24hr 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.
SEC-B
Installation Instructions
to the satisfaction of the manufacturer.
v5
Gas Pressure proving.
·
Auto restart prove test after fire alarm. (optional)
·
Electrical Isolation. (optional)
·
Gas Detection. (up to 16 detectors with a power pack)
·
Fan interlock. (optional)
·
5 year warranty - 10 years when commissioned
·
00256
SEC-B
features
v5
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Table of Contents
Related Manuals for Medem SEC-B v5
Summary of Contents for Medem SEC-B v5
- Page 1 00256 SEC-B Installation Instructions The SEC-B v5 is a gas pressure proving system with options for; electric isolation, gas detection and ventilation interlocking. The system will perform a down stream integrity check ensuring gas tightness before use, close the gas solenoid valve in the event of;...
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Page 2: System Description
AD-PP transformer pack), Combustible, Carbon Monoxide, Carbon Dioxide & Oxygen. The detectors are pre- calibrated by Medem (UK) Ltd such that they only require to be connected to the panel and functionally tested. In the event of a high alarm from one of the detectors the system will isolate the gas supply by closing a connected electric control valve. -
Page 3: Main Features
00256 SEC-B Main features See page 4 for settings 9 10 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. To contactor for isolating socket electricity supply, or fan (optional). 230 volt out to water valve. - Page 4 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 10,11).
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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 00256 SEC-B 21. Fill and Prove Gas Fill Time. The Fill Time should be set so 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. (Factory default setting is 5 seconds).
- Page 7 00256 SEC-B Schematic Basic connections Earth Connections not shown See page 4 for settings (13) Fire alarm connection Requires a N/C contact in the fire panel (9,10) Ventilation Interlock connections 9 10 See page 7 Addressable Gas AUX 1 & AUX 2 230v Supply detector (4core) Nominal 20v supply...
- Page 8 Where using 3 phase fans interlock on a single phase Live feed through the Medem CM2M-K 2 channel current Monitor All current wiring regulations must be followed with reference to running low and mains voltage cables together. The maximum cable length between a detector and the control panel should not exceed 100 metres, if the distance between...
- 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: Detector Information
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 The cause of the alarm will require identifying and resolving before the gas supply can be reestablished. 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.
- Page 12 00256 Pressure Sender & SEC-B 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.
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Page 13: Fitting Kit
00256 SEC-B 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. NOTES: Solenoid coil of the valve should never be mounted below the horizontal. - 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 00256 SEC-B 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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