- All new kitchens must have interlocking on
the ventilation system to comply with BS 6173
and GSIUR 27(4).
- Any kitchen built after September 2001 must
have interlocking on the ventilation system
to comply with BS 6173 and GSIUR 27(4).
- Any existing appliances that are modified
or maintained or replaced may also require the
ventilation system to be interlocked. (See CORGI
Technical Bulletin TB 130)
What is an interlock?
An interlock is a system that will not allow the
gas to be turned on until the ventilation system
is operating correctly.
Why is an interlock required?
An interlock is required to ensure the safety and
comfort of the kitchen staff. If the ventilation
system is not operating correctly, gases including
carbon monoxide and nitrogen dioxide can build up
to dangerous levels. These two gases give most concern
to the Health and Safety Executive (HSE).
How does the interlock work?
A sensor must detect an air flow above a certain
threshold and then the system will enable the gas
isolation valve to open, thereby allowing the gas
appliances to be used.
If there is no Airflow the gas isolation valve CANNOT
open.
To comply with CORGI regulations, actual airflow
"draught" must be measured to determine
if the isolation valve should open or not. Any form
of electrical, or "fan running" interlock
does not comply with the regulations.
The important point here is that it is not sufficient
just to have a ventilation system, but that it must
actually be working correctly for the chef and staff
to be safe from poisoning.
The risks of not complying with the regulations
include the following:
- Risks to the health of employees.
- Insurance implications of a claim by an individual
or because of a related accident.
- The possibility that a CORGI registered installer
may issue an At Risk or Immediately Dangerous
certificate which could adversely affect trade.
Where the interlock has not been installed, a
prompt solution is required to avoid costly delays.
We have three systems available:
- Panther 300 for kitchens requiring
a basic interlock - simple to operate and use.
- Panther 500 for Restaurants with an override
facility in an emergency.
- V85 for kitchens with older equipment
without flame protection. This system combines
gas proving and interlock features.
The interlock system is supplied to installers as
a tested system, with the control panel, airflow
sensors, connectors and comprehensive installation
instructions.
We also have our own installation teams who can
carry out installations on behalf of customers.
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