Alphabetical scale that describes the type of alarms that are installed in the system. The most common Grades for domestic installations are:
Grade D1 = A system of one or more mains-powered detectors, each with a tamper-proof standby supply consisting of a battery or batteries.
Grade D2 = A system of one or more mains-powered detectors, each with an integral standby supply consisting of a user-replaceable battery or batteries.
Grade F1 = A system of one or more battery powered detectors, powered by a tamper-proof primary battery or batteries.
Grade F2 = A system of one or more battery powered detectors, powered by a user-replaceable primary battery or batteries.
References the areas of coverage with the alarm system:
LD1 = Alarms in all rooms/areas apart from bathrooms, shower rooms and toilets
LD2 = Alarms in hallways and landings (circulation spaces & escape routes) plus alarms in the kitchen and living room (high risk areas)
LD3 = Alarms in hallways and landings (circulation spaces & escape routes)
Once the system has been installed it should be tested and an installation certificate provided. Some certificates ask for a smoke/heat test to be performed on the alarms, however we do not recommend this as the results can be misleading and all Aico alarms are tested in smoke/heat/CO as part of the production process. We recommend testing using the test button on front of the alarms.
If your certificate requires reference to smoke/heat testing, you can use the following wording as a ‘variation’ if you are testing using the test buttons:
“A physical smoke/heat test has not been performed, having been substituted by following the testing recommendation contained within the Siting and Installation Instructions supplied by the manufacturer of the alarms installed.”
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