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The SEC-B 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, ventilation failure, low incoming gas pressure or if the
emergency stop/fire alarm is activated.
It can automatically restart after a power cut and a fire alarm when the option is enabled. 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. Out of hours please call 07894 684080 or
07843 355163.
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
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.
V4
•
Gas Pressure proving.
•
Electrical Isolation. (optional)
•
Gas Detection .(up to 16 detectors with a power pack)
•
Automatic restart after a power cut and fire alarm.
•
Fan interlock. (optional)
•
5 year warranty - 10 years when commissioned
00241
SEC-B features
1
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Summary of Contents for Medem SEC-B
- Page 1 00241 SEC-B Installation Instructions The SEC-B 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, ventilation failure, low incoming gas pressure or if the emergency stop/fire alarm is activated.
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Page 2: System Description
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). -
Page 3: Main Features
00241 SEC-B Main features Power at 230 volts from a 3amp fused spur Connections to panel: marked on board Live & Neutral 230 volts supply from 3amp switched fuse spur 230 volts out to gas solenoid valve (required) To contactor for isolating bench socket electricity supply (optional) see page 9... -
Page 4: System Settings
00241 SEC-B System Settings Blind buttons - engineer features Press button A - To display the gas pressures and view the set pressure proving set times. Press button B - To display the gas installed gas detectors 1-8 press A & B together to view 9-16. - Page 5 00241 SEC-B System Settings 17. 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.
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Page 6: 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 7 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 Detector location will vary dependant on the individual characteristics of the target gas that is being monitored for.
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Page 8: Basic Connections
+/- 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 Live feed through the Medem CM2M-K2 channel current Monitor... -
Page 9: Method Two
00241 SEC-B Electrical contactor Method One (Preferred) Preferred Method 1 ( Using this wiring method, when isolating the supply there are no other voltages present within the panel. 230v Supply Electrical Contactor 3Amp Fused Spur Method Two IMPORTANT! If wired this way, a warning notice must be attached to the panel to indicate that there are two separate mains feeds. -
Page 10: Direction Of Flow
00241 SEC-B Pressure Sender & 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 11: Fitting Kit
00241 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. - Page 12 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 13: 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. - 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 a er installa on 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 00241 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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