Medem SEC-K Manual
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Medem SEC-K Manual

Multi-function control system for kitchens
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Multi-Function
Control
System
for Kitchens
SEC-K
The Home of
Control & Automation
in Ireland

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Summary of Contents for Medem SEC-K

  • Page 1 Multi-Function Control System for Kitchens SEC-K The Home of Control & Automation in Ireland...
  • Page 2 Multi-Function Control System For Kitchens The SEC-K is a ventilation interlock system combined with gas pressure proving that allows individual control of the gas supply and work top electrics, it ensures that all fans are running before allowing gas available for use Each services can be individually controlled using the tactile buttons on the panel with overall secure isolation provided by the main on/off switch.

  • Page 3: Design Features

    CO2 levels being monitored and should a 5000ppm level be reached the gas must be isolated. Protects people and property by testing for leaks and open appliances before allowing gas patented available by using Medem true differential gas pressure measuring across the nuisance tripping solenoid valve.
  • Page 4 Gas Pressure Proving Using the patented differential pressure proving method the SEC-K can test for low pressure (natural/LPG) gas pipe work or can pressure prove a variety of gas delivery lines including Oxygen up to 10bar. Overpressure can also be monitored and reported on the LCD display.

  • Page 5: Technical Data Sheet

    SEC-K Technical data sheet The SEC-K system comprises of a pressure sender unit and a 230volt gas solenoid valve. The panel housing is an ABS enclosure, rated IP65, measuring 183mm high, 212mm wide & 97mm deep. The pressure sender unit and the gas solenoid valve are supplied with a fixing kit for connection on site.
  • Page 6 Learn field device button, press once only when all detectors are connected and powered (verify with Blind button B). Jumper link to disable audible alarm sounder. Lift valve button, opens the gas valve only whilst the button is continuously pressed, for commissioning purposes. Medem (UK) Limited Tel: +44 (0) 161 233 0600 L&M Business Park , Norman Road...
  • Page 7 SEC-K Electrical contactor Preferred Method 1 ( Using this wiring method, when isolating the supply there are no other voltages present within the panel. To Contactor Coil Earth Connections not shown Method 2 IMPORTANT! If wired this way, a warning notice must be attached to the panel to indicate that there are two separate mains feeds.
  • Page 8 Fan speed Fan Supply controls 230 v Medem CM2 2 channel current Monitor fans Medem (UK) Limited Tel: +44 (0) 161 233 0600 L&M Business Park , Norman Road Fax:+44 (0) 161 233 0601 Altrincham, Cheshire, Website: www.medem.co.uk WA14 4ES e-mail:sales@medem.co.uk...
  • Page 9 This information is then instantly available for precise service back up and support via our 24hr telephone helpline. The 24hr helpline is manned by Medem personnel only. "We design it, We build it, We back it up"...

  • Page 10: Operation

    Press the gas button and the system will indicate an alarm state and a message relating to ventilation not running will be displayed and the gas will remain isolated. Isolate the incoming gas supply to the Kitchen; turn the SEC-K off & on and press the gas button again: The system will indicate an alarm state and a message relating to insufficient gas pressure will be displayed and the gas will remain isolated.
  • Page 11 The system should be switched off using the main system on/off switch at the end of a service so a new pressure test can be completed ensuring there are no leaking appliances or appliances left Due to the Medem SEC-K being a digital system that checks its self every time it is switched on there are no recalibration requirements.
  • Page 12 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.

  • Page 13: System Description

    Multi gas detection, air quality monitor, fan interlock and gas pressure proving system The SEC-K is a gas pressure proving system with electric isolation, gas detection and ventilation interlock. By monitoring the carbon dioxide and temperature the system can control ventilation levels where required. It is designed for use primarily in commercial kitchens.

  • Page 14: Main Features

    SEC-K 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 To contactor for isolating bench socket electricity supply...

  • Page 15: System Details

    SEC-K System details HAL - High alarm GON - Gas On EST - Emergency stop ALT - Low Alarm 15.BMS Relay PCB. Two relays, for connection to a BMS to indicate, high & low alarm, gas on, EM stop. (One selectable from each...

  • Page 16: Basic Connections

    SEC-K Basic Connections See page six Medem Addressable 0-10v output for con- Gas detectors necting to a fan speed controller EM Stop Buttons, TT-70c Series 3 amp connected Connect multiple fused spur detector in parallel 230v Gas Solenoid Requires a volt...
  • Page 17 SEC-K Electrical contactor Preferred Method 1 ( Using this wiring method, when isolating the supply there are no other voltages present within the panel. To Contactor Coil Earth Connections not shown Method 2 IMPORTANT! If wired this way, a warning notice must be attached to the panel to indicate that there are two separate mains feeds.
  • Page 18 SEC-K Schematic SEC-K Earth Connections not shown 0-10v output for 3 amp fused spur connecting to a fan 230v speed controller 6 core low voltage Addressable cable Gas detector Addressable Gas detector Requires a volt free NC contact Gas Solenoid...
  • Page 19 SEC-K Remote stop buttons To EM Stop connections in Single Switch Use terminals TB2 A and TB2 C To EM Stop connections in the panel Multiple Switches Wire in series Use terminals TB2 A and TB2 C Use terminals TB2 A and TB2 C Remote stop buttons can be connected to the panel terminal marked as “EM STOP”...

  • Page 20: Detector Information

    SEC-K Detector Information Detector Location Detector location will vary dependant on the individual characteristics of the target gas that is being monitored for. The descrip- tions below describe the position for each detector after considering these characteristics. Natural Gas Natural gas detectors should be mounted at high level on a wall approximately 150mm from the ceiling height and avoiding corners and potential dead air areas.
  • Page 21 Modern Plant Limited, Otter House, Naas Road, Clondalkin, Dublin 22 Tel: 00353 1 461 4300 E: sales @ modernplant.ie, W: www.modernplant.ie Please do not hesitate to call for advice on the following number: 00353 1 461 4300 o ce hours...

  • Page 22: Valve Connection

    SEC-K Valve connection Mounting of gas solenoid valve with Sender Unit for Medem Gas Pressure Proving System Correct Correct Solenoid Pressure Sender Unit Incorrect Incorrect Never mount the valve such that the Solenoid or Sender Unit are below the horizontal.

  • Page 23: Fitting Kit

    SEC-K Fitting Kit MOUNTING DETAILS FOR PRESSURE SENDER UNIT ON VALVE 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 24 Irish distributors for the pumps to suit a variety of full range of SMC products complete Medem gas safety water boosting and water and have a wide range of product range. Both companies transfer applications across...

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