Medem SEC-K User manual

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

Medem (UK) Limited
L&M Business Park , Norman Road
Altrincham, Cheshire,
WA14 4ES
Tel: [phone]
Fax:[phone]
Website: www.medem.co.uk
e-mail:[email protected]
Cert No. 10213
SEC-K
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.
Gas detectors for carbon dioxide and temperature enables demand based ventilation control and
monitoring of CO2 levels with added functionality of secondary interlocking. Natural gas, LPG and
Carbon Monoxide detectors can also be monitored.
Gas pressure proving for Natural & LPG gas with low and high pressure isolation.
An auto stop timer can be enabled to switch the services off automatically after a selectable number of
hours.
Industry leading 5 year warranty or 10 years when commissioned by Medem UK.

Medem (UK) Limited
L&M Business Park , Norman Road
Altrincham, Cheshire,
WA14 4ES
Tel: [phone]
Fax:[phone]
Website: www.medem.co.uk
e-mail:[email protected]
Cert No. 10213
SEC-K
Design Features
Ventilation interlock of the kitchen fans by current monitoring or air flow, with fan status
displayed on the easy to use LCD.
Gas & electric isolation of a kitchen in one control panel, provides control for use and an
individual isolation point for an emergency.
CO2 monitoring enables demand based ventilation control and monitoring of CO2 levels
prescribed by the HSE and Technical Bulletin 140.
Additionally with the installation of CO2 detectors secondary Interlocking can be used. This
means with a correctly designed interlock system should there be a mechanical ventilation
failure a 24hr allowance is available to interlock on the CO2 level. Using the secondary
interlocking method it is imperative that the system is designed such that a interlock is not
initiated without the correct 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
available by using Medem patented true differential gas pressure measuring across the
solenoid valve. This eliminates nuisance tripping of the gas supply as can happen with
mechanical switches.
Extremely simple to use, LCD panel tells the operator its status and what to do, with
connections to a BMS and an internal an audible buzzer.
Continual dynamic monitoring of the inlet pressure ensures a low pressure of 12mbar or
less causes an isolation of the gas solenoid valve to prevent the risk of Bunsen burners
extinguishing.
An Over pressure of 70mbar. or above would also cause an isolation, this is to protect
operators or equipment from a over specked high gas pressure.
Quick proving time, typically 50 seconds from switch on to ready for use.
In the event of a fire alarm test being undertaken the system can be set into a fire test
isolation mode, once the test is completed the panel will revert to normal operation and
be included in a fire alarm activation.
As a guidance, an engineer, can see classroom & valve seat gas leakage on the LCD.
Emergency shut off button, more can be added all low voltage.
Gas detection of Natural gas, Carbon Dioxide, Carbon monoxide, Oxygen and L.P.G
Auto stop timer no complicated timer resetting, protects building out of hours.

Medem (UK) Limited
L&M Business Park , Norman Road
Altrincham, Cheshire,
WA14 4ES
Tel: [phone]
Fax:[phone]
Website: www.medem.co.uk
e-mail:[email protected]
Cert No. 10213
SEC-K
The SEC-K is designed to protect people and property by means of testing for leaking
gas each time the system is switched on. Whether gas is escaping from an open
appliance that has been left on the system will not open the gas solenoid valve until the
gas line is gas tight. This system also isolates the electric and water bench sockets and
taps.
The LCD screen displays the current status of the system. The panel offers solutions and
advice instead of rows of flashing LED’s that can often be confusing to the end user. A
number of engineer functions are available within the panel in order to facilitate faster
installation and testing of equipment. Amongst others, a tightness test indication of the
gas line and a solenoid valve let by test can be carried out from the panel using the
function buttons on the circuit board. Gas pressure readings from both sides of the
valve can be displayed on the LCD unit .
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.
Fan interlocking
To meet current regulations the system can interlock any mechanical ventilation so that
all fans are operating before gas can be used.
Demand controlled ventilation
Carbon Dioxide level and temperature monitoring to control area ventilation in a
laboratory. This enables energy and cost savings with the ventilation rate based on
occupancy and activities such as cooking or Bunsen burner use. Where the CO2 level
rises above prescribed limits the system can where required isolate a gas supply. The
limit is variable depending upon the application and prevailing legislation or guidance.
Gas Detection
The SEC has been designed to accept multiple Gas detectors, these include: Carbon
Dioxide, natural & LPG gases, Carbon Monoxide, Oxygen depletion & enrichment.
Isolation of gas will occur upon detection of the target gases at prescribed levels.
All features are installed as standard which can either be utilised at the point of
installation or at a later date should requirements or legislation change.

Medem (UK) Limited
L&M Business Park , Norman Road
Altrincham, Cheshire,
WA14 4ES
Tel: [phone]
Fax:[phone]
Website: www.medem.co.uk
e-mail:[email protected]
Cert No. 10213
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.
The pressure sender unit is wired to the control panel using single pair low voltage wire.
The connection terminals are marked “A & B” on both the sender unit and control panel connections.
The 230volt mains supply to the panel should be from a 3amp fused switch.
The solenoid valve is connected to the terminals marked “Valve” on the panel connections.
The connections marked “EM STOP” are provided in order that extra emergency stops can be operated by the
panel. Wiring of emergency stop buttons should be series normally closed, extra low voltage.
The connections marked “CM2 or PD switches are for the connection of a current monitor or pressure
switches for interlocking fans with the gas supply.
The connections marked “detectors” are for the connection of up to 16 devices including, Methane, LPG, Co2,
CO, Oxygen and temperature. Mixed devices can be connected.
At the time of installation adjustments to the system can be made to suit the individual site, these include:
Auto stop timer, alarm sounder on/off, fill time and prove time for pressure proving to find the smallest leak.
All are factory set for a typical installation.
For guidance purposes only, a let by and a tightness test can be activated by the engineer using the push
buttons on the circuit board. This is a diagnostic indicator. The Gas pressure readouts appear on the LCD
display indicating the pressure on both sides of the valve.
System On/Off enables gas detection and use
of each service button
A B
ABlind button for displaying gas pressures on the LCD screen
BBlind button for displaying first 8 detectors (Gas & temperature) on the LCD screen.
Press A& Btogether to display second set of 8 detectors.
(
Press button B3 times in quick succession to enable fire test mode see page 4)

Medem (UK) Limited
L&M Business Park , Norman Road
Altrincham, Cheshire,
Tel: [phone]
Fax:[phone]
Website: www.medem.co.uk
Cert No. 10213
SEC-K
Connections to panel: marked on board
1. Live & Neutral 230 volts supply from 3amp switched fuse spur
2. 230 volts out to gas solenoid valve
3. To contactor for isolating bench socket electricity supply
4. 230 volts out to water supply isolation valve
5. Earth connection terminals
6. Remote emergency stop buttons SELV, connect in series multiple buttons (requires a N/C circuit)
7. Extract fan interlock for current monitor (CM2M-K) or PD switches.
8. Supply fan interlock for current monitor (CM2M-K) or PD switches.
9. 12 volt power for current monitor (CM2M-K)
10. Pressure sender unit SELV and comm’s both through “A” & “B” terminals (2 wire) MUST BE FITTED
11. Power connections for detectors, Methane, LPG, CO, CO2, Oxygen, Temperature
12. Comms connections for detectors, Methane, LPG, CO, CO2, Oxygen, Temperature
13. Fire alarm input signal (N/C contact required).
14. 0-10 volt output to fan speed controllers based on CO2 and temperature levels
15. Two relays, for connection to a BMS to indicate, high alarm, gas on, EM stop, low alarm. (One selectable for each relay)
16. OPTA=Over pressure check, will isolate gas supply if pressure exceeds 70 mbar
17. Fill & prove time for gas pressure proving, see page 4.
18. Timer adjustment for fan commissioning, allows timed period for gas installation commissioning.
19. Auto stop timer to isolate gas after set length of time. Factory set for model & use
20. CO2 alarm level adjustment depending on application. Factory set for model & use
21. High pressure low cut out adjustment (
where high pressure sender unit is used 1 bar> )
22. Fan comm button, enables commissioning of the gas supply without fans running.
23. Learn field device button, press once only when all detectors are connected and powered (verify with Blind button B).
24. Jumper link to disable audible alarm sounder.
25. Lift valve button, opens the gas valve only whilst the button is continuously pressed, for commissioning purposes.
Power at 230
volts from a
3amp fused spur

6
Electrical contactor
SEC-K
Method 1 ( Preferred )
Using this wiring method, when isolating the supply there are no other voltages present within the panel.
N L
To Contactor Coil
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.
L N
Supply in
Contactor coil
Live feed through switched relay
to operate contactor
To bench
sockets
L N
Supply in
Earth Connections not shown

Medem (UK) Limited
L&M Business Park , Norman Road
Altrincham, Cheshire,
WA14 4ES
Tel: [phone]
Fax:[phone]
Website: www.medem.co.uk
e-mail:[email protected]
Cert No. 10213
SEC-K
Electrical Contactor
Gas Solenoid
230v
3 amp fused spur
230v
EM Stop Buttons,
TT-70c
Series connected
Addressable
Gas detector
Addressable
Gas detector
6 core low voltage
cable
Sender unit
Mounts on the gas valve
Requires a
volt free NC
contact
0-10v output for
connecting to a fan
speed controller
fans
Medem CM2
2 channel current
Monitor
6 core low voltage
1 x + - 12v
fans
Fan speed
controls Fan Supply
230v
230 v
Earth Connections not shown
Where using 3 phase fans
interlock on a single phase

Medem (UK) Limited
L&M Business Park , Norman Road
Altrincham, Cheshire,
WA14 4ES
Tel: [phone]
Fax:[phone]
Website: www.medem.co.uk
e-mail:[email protected]
Cert No. 10213
SEC-K
"We design it, We build it, We back it up"
The Medem main panels come with an industry leading 5 year parts warranty
as standard and when commissioned by a Medem engineer this can be
increased to 10 years and includes a 24hr helpline.
During the commissioning process a Medem engineer would attend site to
ensure full and correct operation of the supplied Medem equipment, all site
information including gas pressures, amperages and photographs would be
taken and then uploaded to our service database.
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.
Warranty & Commissioning

Medem (UK) Limited
Project House, 19 Dallimore Road,
Roundthorn Industrial Estate,
Manchester, M 3 9NX
Tel: [phone]
Fax:[phone]
www.medem.co.uk
e-mail:[e-mail]
Cert No. 10 13
SEC-K Operating and Maintenance
Operation
Turn the main system switch to the on position, the LCD will display the message “Select Service”
also at this point any gas or temperature detectors that are connected are now active and being
monitored and the LCD will report “Detectors Active”. Press one of the yellow coloured service
buttons to active the desired service.
Normal operating procedure for electric (with the panel enabled)
 Press ‘ELEC’ button.
 Electric should now be available for use.
 Press ‘ELEC’ button again to isolate
Normal operating procedure for gas (with the panel enabled)
 Press ‘GAS’ button and wait for testing cycle to complete.
 Gas should now be available for use. (If not see below for more information)
 Open gas outlets and use as normal.
 Press ‘GAS’ button again to isolate, and ensure gas outlets are closed.
All services can be isolated together by switching the main switch to ‘OFF’
Maintenance and testing
The fill time should be set at installation long enough to ensure the downstream pipe work comes
up to pressure.
(factory default 5 seconds)
The prove time should be set at installation to find the smallest possible leak.
(factory default 50 seconds)
To test all features the s stem.
Do not switch the ventilation et; turn on the SEC-K first:
Turn the main system switch to the on position, the LCD will display the message “Select Service”
also at this point any gas or temperature detectors that are connected are now active and being
monitored and the LCD will report “Detectors Active”. Press one of the yellow coloured service
buttons to active the desired service.
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 suppl 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.
Re-establish the gas suppl and switch on an ventilation; open a gas appliance so that a demand
is being made on the gas suppl : turn on the SEC-K and press the gas button:
The system will begin a pressure test and indicate an alarm state, a message relating to “check all
appliances” will be displayed and the gas will remain isolated.
Continued..

Medem (UK) Limited
Project House, 19 Dallimore Road,
Roundthorn Industrial Estate,
Manchester, M 3 9NX
Tel: [phone]
Fax:[phone]
www.medem.co.uk
e-mail:[e-mail]
Cert No. 10 13
Close the gas appliance and re-test the gas.. The gas test should successfull complete, if the gas
test fails and ou have checked all appliance are off ou have a gas leak and require a gas
engineer to check the pipe work..
With the gas proven and available for use, breathe onto the CO2 sensor (where fitted):
The system will indicate a rise in CO and advise the operator to increase any available ventilation.
Or the SEC-K system will attempt to increase the ventilation (where the feature has been connected)
If this is not done and a level of CO remains present at the sensor the panel will go into a high
alarm condition and isolate the gas supply.
The s stems are currentl set to 2300ppm low alarm and 2800ppm high alarm.
All of these procedures are dynamically carried out by the SEC-K system each and every time it is
switched on. The system should only be turned on during service and switched off when the gas is
not in use so the gas supply remains isolated.
There should be a manual operational test on any installed Emergency stop buttons, which when
operated will isolate the gas supply and remain isolated until a manual reset is completed.
If utilized an auto stop time out will isolate the gas after the set period (default disabled).
A yearly test and inspection of the solenoid valve and let by test should be carried out by a qualified
technician i.e. Gas safe registered engineer.
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
on.
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.
If fitted the detectors are designed to have very low drift so recalibration on site is not required but
should be replaced every 5 years in a clean environment but consideration should be given to
replacement after 3 years if contamination is a possibility. A functionality test should be carried out
every 6-1 months.
The gas and electric supply are controlled by the soft touch switches after the panel has been
enabled with the system switch position set to ON
If at an time there is an alert or the sounder sounds follow the on screen instructions,
further information can be found both in the installation instructions and b contacting
Medem (UK) Ltd.

Please read this sheet as it contains
important information
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
0 894 684080 or 0 843 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.
Important
SEC-K
Medem (UK) Limited
Project House, 19 Dallimore Road,
Roundthorn Industrial Estate,
Manchester, M23 9NX
Tel:: [phone]
Fax::[phone]
Website: www.medem.co.uk
e-mail:[e-mail]

2
System description
SEC-K
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.
The system comprises of a mains powered panel capable of operating a mix of up to 16 devices of different types. The device types are, carbon
dioxide, carbon monoxide, combustible gases, oxygen depletion and temperature.
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 or ventilation failure, low incoming gas pressure or if the emergency stop button is pressed.
Control Panel
the front of the panel has the following controls and indications:
Emergency stop button
key switch
On/off buttons for gas and electric
Blind button A and B
LED indications:
Power On - green………...A blind button for displaying gas pressures on the LCD screen
Gas/Electric - red
Fans running light – yellow….B blind button for displaying connected devices (detectors & temperature) on the LCD screen
LCD display:
For displaying system status during both installation and normal use, also for displaying diagnostics
Other points to note
The maximum cable length between a detector and the control panel should not exceed 100 metres, If the distance between the
main panel and the detectors is greater than 20metres 1mm cable should be used on the +VE, 0v terminals.
Pressure Sender Unit Mounting. This has an inlet and an outlet port (1/4 inch NPT). The inlet must be connected to the inlet test point
on the solenoid valve (see fitting kit page) and the outlet port after the solenoid valve typically using 8mm OD copper pipe. Use the
appropriate Medem fitting kit to fit the control valve size. The pressure sender is connected to the control panel with low voltage two
core cable using the terminal marked A & B. NOTE: This is low voltage and should be segregated from mains wiring.
INS/101 /002
System On/Off enables gas detection and use
of each service button
A B
A Blind button for displaying gas pressures on the LCD screen
B Blind button for displaying first 8 detectors (Gas & temperature) on the LCD screen.
Press A & B together to display second set of 8 detectors.
( Press button B 3 times in quick succession to enable fire test mode see page 4)

3
Main features
SEC-K
Connections to panel: marked on board
1. Live & Neutral 230 volts supply from 3amp switched fuse spur
2. 230 volts out to gas solenoid valve
3. To contactor for isolating bench socket electricity supply
4.
5. Earth connection terminals
6. Remote emergency stop buttons SELV, connect in series multiple buttons (requires a N/C circuit)
. Extract fan interlock for current monitor (CM2M-K) or PD switches.
8. Supply fan interlock for current monitor (CM2M-K) or PD switches.
9. 12 volt power for current monitor (CM2M-K)
10. Pressure sender unit SELV and comm’s both through “A” & “B” terminals (2 wire) MUST BE FITTED
11. Power connections for detectors, Methane, LPG, CO, CO2, Oxygen, Temperature
12. Comms connections for detectors, Methane, LPG, CO, CO2, Oxygen, Temperature
13. Fire alarm input signal (N/C contact required).
14. 0-10 volt output to fan speed controllers based on CO2 and temperature levels
15. Two relays, for connection to a BMS to indicate, high alarm, gas on, EM stop, low alarm. (One selectable for each relay)
16. OPTA=Over pressure check, will isolate gas supply if pressure exceeds 0 mbar
1 . Fill & prove time for gas pressure proving, see page 4.
18. Timer adjustment for fan commissioning, allows timed period for gas installation commissioning.
19. Auto stop timer to isolate gas after set length of time. Factory set for model & use
20. CO2 alarm level adjustment depending on application. Factory set for model & use
21. High pressure low cut out adjustment ( where high pressure sender unit is used 1 bar> )
22. Fan comm button, enables commissioning of the gas supply without fans running.
23. Learn field device button, press once only when all detectors are connected and powered (verify with Blind button B).
24. Jumper link to disable audible alarm sounder.
25. Lift valve button, opens the gas valve only whilst the button is continuously pressed, for commissioning purposes.
1 . OPTL Enable/Disable the front panel “FANS” LED (link on to disable)
Power at 230
volts from a
3amp fused spur
26

4
System details
SEC-K
18.Timer adjustment for fan commissioning, allows timed period for gas installation commissioning.
19.Auto stop timer to isolate gas after set length of time. Factory set for model & use
20.CO2 alarm level adjustment depending on application. Factory set for model & use
21.High pressure low cut out adjustment
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.
Gas Prove Time. This should be set such that the smallest leak can be detected. This time can be set up to a
maximum of 99 seconds. Increasing this time effectively makes the system more sensitive to gas leaks.
(Factory default setting is 50 seconds). An extra 60 seconds prove time can be added onto the 99 seconds
by adjusting the DIP switch under the options bank, see No 16.
15.BMS Relay PCB. Two relays, for connection to a BMS to indicate, high & low alarm, gas on, EM stop. (One selectable from each
relay) Max switching 48 volts 1 amp
HAL - High alarm
GON - Gas On
EST - Emergency stop
ALT - Low Alarm
Fan comm.
To enable the commissioning of the gas portion of the system before the ventilation interlock is completed to you may temporarily
disable the interlocking by pressing button 22. This will bypass the ventilation interlock allowing the gas to be tested, the system
must not be left in this state and as such is only this for a maxim 24hour period but auto exiting. While in commissioning mode the
display will show the message “Not to current standards”. Pressing the button again at anytime will cancel commissioning mode.
Learn Field devices
Any gas detectors connected to the system will require “learning”. First ensure all detectors are set to a unique ID address using
the selector switch on the detectors themselves. Having addressed each detector press the learn field devices button (23), the sys-
tem will scan and store any connected detectors. To verify that all detectors have been successfully learnt press the “blind button
B” on the front panel to view address details.
A B
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.
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 during an fire alarm.
If for the purposes of a fire test you wish to temporarily disable this interlock the SEC system can be put into a “fire test mode” by
pressing blind button B three times in quick succession. This is a timed feature and will auto clear after 45mins. Press again three
times to manually clear and return to normal running.

5
Basic Connections
SEC-K
L N
3 amp
fused spur
230v
Gas Solenoid
230v
EM Stop
Buttons,
TT- 0c Series
connected
Pressure Sender unit
mounts on to the body
of the gas valve
(Required)
Medem
Addressable
Gas detectors
Connect multiple
detector in parallel
fans
Medem CM2
2 channel current
Monitor
6 core low voltage
1 x + - 12v
fans
Fan speed
controls Fan Supply
6 core low voltage cable
Earth Connections not shown
Fan Interlock Connections
See page six
Earth Connections not shown
Requires a volt
free NC
contact
0-10v output for con-
necting to a fan speed
controller
230 v
Where using 3 phase fans
interlock on a single phase

6
Electrical contactor
SEC-K
Method 1 (
Preferred )
Using this wiring method, when isolating the supply there are no other voltages present within the panel.
N L
To Contactor Coil
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.
L N
Supply in
Contactor coil
Live feed through switched relay
to operate contactor
To bench
sockets
L N
Supply in
Earth Connections not shown

7
SEC-K
Schematic
SEC-K
Electrical Contactor
Gas Solenoid
230v
3 amp fused spur
230v
EM Stop Buttons,
TT- 0c
Series connected
Addressable
Gas detector
Addressable
Gas detector
6 core low voltage
cable
Sender unit
Mounts on the gas valve
Requires a
volt free NC
contact
0-10v output for
connecting to a fan
speed controller
fans
Medem CM2
2 channel current
Monitor
6 core low voltage
1 x + - 12v
fans
Fan speed
controls Fan Supply
230v
230 v
Where using 3 phase fans
interlock on a single phase
Earth Connections not shown

8
Remote stop buttons
SEC-K
Single Switch TB2
TB1 TB3
To EM Stop connections in
Use terminals TB2 A and TB2 C
To EM Stop connections in
the panel
TB2
TB1 TB3
Use terminals TB2 A and TB2 C
TB2
TB1 TB3
Use terminals TB2 A and TB2 C
Multiple Switches
Wire in series
Remote stop buttons can be connected to the panel terminal marked as “EM STOP” (number 6 ). The remote buttons
must be wired as above in order to provide a “closed contact” for the control panel.

9
Detector Information
SEC-K
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.
Natural gas detectors should not be mounted below the height of the top of a doorway for example. This is because as the
gas is slightly lighter than air it will rise filling the room from the ceiling down and will spill through the top of a door opening
into the next room. If the detectors are mounted below this height then it will take longer the gas to reach the detector.
LPG
LPG gas is heavier than air so detectors need to be mounted at low level 100mm from the floor, consideration should be given
to any potential mopping or wet floor height.
Carbon Monoxide
Carbon Monoxide is similarly weighted to air so detectors should be mounted between 1 to 2 meters from the floor.
Carbon Dioxide
Classroom Carbon Dioxide detectors under guidance from IGEM/UP11/Edition2 should be mounted at a seated head height.
However following onsite experience this mounting height can make detectors susceptible to false readings due to direct
breath contact. We would suggest following the guidance for mounting as per a commercial kitchen to reduce the potential for
false alarm readings.
Commercial kitchen Carbon Dioxide detectors should be installed so they monitor the general level of CO2 within the cooking
area. They should be mounted above standing head height and between 1m and 3m from the cooking line. 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 guidance on site specific requirements please don’t hesitate to contact us.
Detector Testing
Any installed gas detector can be tested by allowing a small amount of the target gas onto the detector head until a change of
state is registered on the control panel.
If the level of gas applied is of the set low alarm level, the LED on the detector will change from a solid green to a flashing red.
An LED* or LCD* message indicating a low level alarm detection combined with an audible alarm on the panel will begin.
If the level of gas drops below the set low alarm level the detector LED will return to a solid green and the panels audible alarm
and LED* or LCD* message will clear.
Should an emergency shut-off valve be connected to the panel this will remain open during a low alarm level detection.
If the level of gas applied is of the high alarm level or above, the LED on the detector will change from a solid green to a solid
red. An LED* or LCD* message indicating a high level alarm detected combined with an audible alarm on the panel will begin.
Should an emergency shut-off valve be connected to the panel this will automatically close.
Once the level of gas drops below the high alarm level the audible alarm will continue and the high alarm LED* or LCD* mes-
sage will remain.
The valve cannot be reinstated until the gases have been cleared and the control panel reset.
*LED, LCD or both visual outputs will change dependant on the control panel connected.