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00244 

SEC-Lg 

V4

 

Installation Instructions 

 
The SEC-Lg is a gas pressure proving system with optional gas detection and ventilation interlock.  
 
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, ventilation failure, low incoming gas pressure or if the 
emergency stop/fire alarm is activated. 
 
It is designed for use primarily in laboratories.

 

 

 

 

Before commencing installation please familiarise yourself to the equipment by reading the comprehensive 
installation instructions. If in doubt then please call 0161 233 0600. Out of hours please call 07894 684080 or 
07843 355163. 
 

 

It is a statutory requirement that this safety system is installed and commissioned 

to the satisfaction of the manufacturer. 

 

 

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 
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.

 

 

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Gas Pressure proving. 

• 

Gas Detection .(up to 16 detectors with a power pack) 

• 

Fan interlock. (optional) 

• 

5 year warranty  - 10 years when commissioned 

SEC-Lg features 

Summary of Contents for SEC-Lg V4

Page 1: ...ety system is installed and commissioned to the satisfaction of the manufacturer A commissioning certificate must be issued to the end user along with instructions for the operation of the equipment A...

Page 2: ...ns A and B for engineer functions LED indications Power On green A blind button for displaying gas pressures on the LCD screen Gas red when active to warn of liver service Fans running light yellow B...

Page 3: ...ure check will isolate gas supply if pressure exceeds 70 mbar 17 Fill prove time for gas pressure proving see page 5 18 Timer adjustment for fan commissioning allows timed period for gas installation...

Page 4: ...as detectors 1 8 press A B together to view 9 16 Fire Test Mode Press button B three times When connected to a fire alarm panel using the fire alarm terminal no 13 the system will isolate the gas duri...

Page 5: ...1 Option Headers 18 19 21 20 Fan comm To enable the commissioning of the gas portion of the system before the ventilation interlock is completed you may temporarily disable the interlocking by pressin...

Page 6: ...e the gas detectors own instructions for more guidance SEC Lg Detector Information VE supply Comm s From either the main panel or an extender Detectors are wired in parallel and can be connected to on...

Page 7: ...een 1m and 3m from the potential source Care should be taken so they are not located close to the edge of a canopy or in direct flow of the supply or extract ventilation For additional information or...

Page 8: ...iple connect in parrallel Live feed through the Medem CM2M K2 channel current Monitor fans Fan speed controls Fan live Supply Fire Alarm Requires a volt free NC contact Where using 3 phase fans interl...

Page 9: ...s 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 Correct Pressur e Solenoid Never mount the valve such...

Page 10: ...Solenoid coil of the valve should never be mounted below the horizontal Pressure sender unit should never be mounted upside down to protect from water ingress Approx 400mm length INLET PORT OUTLET PO...

Page 11: ...ld be wired in series with the EM stop buttons To EM Stop connections in the panel Indicator bar shows when pressed Normal EM Stop Activated Multiple Stop Buttons Single Stop Buttons Resetting indicat...

Page 12: ...er Medem UK will exchange faulty valves for return to the manufacturer 5 Where a Medem UK engineer or another company appointed by Medem UK commission and installed system then that system will carry...

Page 13: ...essed the display detectors button whilst checking on the LCD display that all the detectors have been recognised by the panel A recognised detector will appear as CO Carbon Monoxide CM combustible CH...

Page 14: ...ssure test If at any point the fans stop running opening the S1 or E1 contact the system will isolate the gas and report fans not running Check that the fans are not only switched on but actually runn...

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