Acceptance Test Sampling on a New Hotel System
You are assigned to witness the acceptance test of a new addressable fire alarm system in a 96-room, four-story hotel. The system has 212 initiating devices, 186 notification appliances, 14 control modules, and a voice evacuation panel. The installing contractor has six hours on site and proposes to test one device per floor per zone, plus all manual pull stations, because 'the rest are new and factory-tested.' The contractor has not provided battery calculations, a voltage-drop calculation for the notification appliance circuits, or the manufacturer's installation instructions. The general contractor wants the certificate of occupancy and asks you to sign off on what you can see. The building is still under construction, with drywall dust present and some ceilings not yet installed.
1. Is the contractor's sampling plan acceptable for acceptance testing? Explain.
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No. Acceptance testing is a 100 percent functional test of the installed system, not a statistical sample. Each initiating device must be operated and each notification appliance must be confirmed to produce its intended output. 'Factory-tested' does not cover field wiring, address programming, labeling, or interface modules. Sampling may appear in some periodic inspection contexts, but it does not apply to initial acceptance. Testing one device per floor per zone would leave most of the 212 devices and 186 appliances unverified. If time is short, the test must be extended or split into phases; the schedule is not a reason to reduce scope.
2. What documentation should be available before acceptance testing begins?
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Before testing, require the battery calculation, the notification appliance circuit voltage-drop calculation, manufacturer's installation instructions, as-built drawings, the sequence of operations, and the completed record of completion. These documents let you verify that the installed system matches the design and that the secondary power supply and wiring can support the load. Missing calculations are a deficiency in the submittal package, not a paperwork nuisance. Without them you cannot confirm standby capacity or that the last appliance on each circuit will operate at its rated voltage.
3. How should construction dust and missing ceilings affect your acceptance test?
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They affect both safety and validity. Drywall dust can contaminate smoke detectors and cause nuisance alarms or false passes; detectors should be cleaned or replaced before final testing. Missing ceilings change smoke travel and detector spacing, so a smoke test performed now may not represent the finished space. Do not sign off on a system that is not installed per design. List incomplete ceilings and housekeeping as conditions preventing acceptance, and schedule retesting after cleanup and ceiling completion.