The fire tests should be conducted for 10 min after the activation of the first nozzle, and any remaining fire should be extinguished manually.
Fire tests should be conducted with the ignition centred under one, between two and below four nozzles. An additional test should be conducted with the ignition centred under a disabled nozzle.
The fire tests should be conducted with at least four nozzles arranged in a 2 x 2 matrix.