Home 9 Product 9 KS22 – Controller for use with G621 in Kitchens

KS22 – Controller for use with G621 in Kitchens

The KS22 is the controller for the Duomo G621 Gas proving system. The Duomo Trio SafeStart system is installed in hotels, fast-food restaurants, schools, colleges and canteens. It securely isolates and safely restarts the gas supply. The KS22 also connects to ventilation monitoring and interlocking devices such as air pressure switches, power monitors and Carbon Dioxide alarms.

Quantity discount

Quantity 1-4 5-9 10-14 15+
Price £313.36 £297.69 £282.02 £266.36



Why use a KeyStart 22 Controller – KS22 Trio Safestart?

Obviously if the gas supply to a kitchen or laboratory is started with gas taps open, a gas leak will occur. Crucially the Trio SafeStart protects personnel and property from damage caused by gas leaks. In addition, this unique keypad operated control panel ensures that only authorized personnel are able to start the gas supply. For commercial kitchens the ventilation system can be initiated and checked automatically by the KS22 before it allows gas to flow to any connected appliances.

What does the KS22 do?

Firstly the KeyStart 22 automatically checks the mechanical ventilation system is turned on before allowing gas test to commence. The downstream pipework is then tested for leaks (gas taps left open). Only when it is satisfied that there are no leaks the electrically operated gas valve is automatically opened. All of this makes the KS22 and G621 a great system for ensuring BS6173:2009 compliance.

Finally, when the gas is turned on an automatic safe shutdown will occur if:

Emergency stop push button is pressed (Duomo KOB21)

The Air proving device detects incorrect fan operation (Duomo FP45 Current monitor, ADP10 or ADP65 differential air pressure switch)

Low gas pressure is detected

High levels of Carbon Dioxide are detected by Duomo CO2MC or CO2 Alarm.

To talk to our Sales team about your specific application please call us now on 01905 797989 or email us through our contact page.


Product Details

  • Supply voltage: 230 V ±15%
  • Max out current (all relays): 3 A
  • Out contact operations: > 100 x 10P
  • External limit contact: > 3A @ 250Vac
  • Operating temperature: 0 - 60 °C
  • Dimension: 200x110x60 mm
  • Protection class (EN69): IP66
  • Maximum operating pressure: 50 mbar


Onsite Diagnostics

If you require onsite diagnostics or technical assistance with any of our products please contact us

  • This field is for validation purposes and should be left unchanged.


We recommend Duomo Gas Detection products are serviced at least annually to ensure efficacy and extend sensor life. Our qualified team of engineers are available Nationwide.



  • Datasheet,G621 Safestart + FP45 Current Monitor Wiring Diagram,G621 Safestart + ADP10 Pressure Switch Wiring Diagram,VMR Gas Valve + FP45 Current Monitor Wiring Diagram,VMR Gas Valve + ADP10 Pressure Switch Wiring Diagram,Operating Procedure


Support & Service

If you require technical assistance or an annual service on this product please contact us and we will be happy to help. Our qualified team of engineers are available Nationwide.

Pin It on Pinterest