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Hoodmaster™ CT1200S & CT1250 Gas Interlock Safety Systems
Hoodmaster™ CT1200S & CT1250 Gas Interlock Safety Systems
What is a Gas Interlock system?
A CT1200S & CT1250 Gas interlock system ensures the ventilation is running at its required level. If the ventilation fails, or is turned off the gas supply is isolated.
Is there a regulation?
Yes! AS/NZS 5601.1.2013. This standard covers general gas installations. It mentions “the interlock shall fail safe and it shall be proved in the no-flow state prior to start-up” It also mentions that the interlock “be of the type that will sense actual air movement” such as an air pressure differential switch.
Can I just wire an Air Pd switch to a gas solenoid valve?
It’s not recommended. An air Pd switch can get stuck due to grease and moisture, this means the gas will always be on with no means of isolation. Also if it’s windy weather the air Pd switches are prone to click off and on causing the gas to trip off and on becoming very irritating for the kitchen staff. Also flames can easily extinguish and create gas leaks.
What is Best Practise? Install a Hoodmaster CT1200S or CT1250 interlock system. It checks the Pd switch changes state when the ventilation turns on and then allows the gas on. It eliminates nuisance tripping it has a built in delay to ensure windy days don’t affect the operation. CT1200S & CT1250 Interlock systems can also be connected to fire alarms and fire suppression systems.
All of our CT1200S & CT1250 interlock systems have a built in emergency stops as standard to isolate the gas in the event of an emergency and are recommended to be installed with our GoldSeal gas valves. Our kits are simple and very cost effective. They include either a CT1200s or CT1250 control panel, 2 x air pressure differential switches, 1 x remote emergency shut-off button and options for either a 1/2", 3/4” or 1” Goldseal gas solenoid valve.
What is Best Practise? Install a Hoodmaster CT1200S or CT1250 interlock system. It checks the Pd switch changes state when the ventilation turns on and then allows the gas on. It eliminates nuisance tripping it has a built in delay to ensure windy days don’t affect the operation. CT1200S & CT1250 Interlock systems can also be connected to fire alarms and fire suppression systems.
All of our CT1200S & CT1250 interlock systems have a built in emergency stops as standard to isolate the gas in the event of an emergency and are recommended to be installed with our GoldSeal gas valves. Our kits are simple and very cost effective. They include either a CT1200s or CT1250 control panel, 2 x air pressure differential switches, 1 x remote emergency shut-off button and options for either a 1/2", 3/4” or 1” Goldseal gas solenoid valve.