Acceptance testing and commissioning review

Acceptance testing is the work that puts a new system into service, and it is where submittal preparation, installation and maintenance knowledge come together on the Level II exam. 'An inspection tells the owner the system still works,' Gerry says. 'An acceptance test tells everyone it was built right in the first place. The record of completion is a statement that every device was there, wired right and worked.' This lesson reviews FAT-330: what acceptance testing and commissioning mean, NFPA 72's requirements for acceptance testing and the record of completion, the roles of the contractor, the technician, the engineer and the authority, planning, pre-testing, device-by-device testing, integrated testing, deficiencies and handover.

Three words that are not the same

Acceptance testing, under NFPA 72 Chapter 14, is the 100 percent test of a new system, or of the parts affected by an alteration, before it is accepted (FAT-330). Reacceptance testing is required after changes to the system, its software or its components. Commissioning is a broader process that confirms all the building's life safety systems work together as designed; integrated testing to NFPA 4 is the part that proves the interactions. Periodic inspection, testing and maintenance, reviewed in lesson 8, is the ongoing work on an existing system. A common exam question asks which applies: new system, acceptance test; changed software, reacceptance of the affected functions; annual test, periodic testing; interactions between systems, integrated testing.

Roles

The contractor installs the system and pre-tests it. The technician who performs the acceptance test, usually under the contractor or the manufacturer's representative, records the results. The designer provides the design, and may need to review changes. The authority having jurisdiction witnesses the acceptance test, or part of it, and accepts the system. The owner receives the system, the documentation and the training, and from then on is responsible for its inspection, testing and maintenance (FAT-330). NFPA 72 requires the record of completion to be filled out and signed by the people responsible.

Planning and pre-testing

Verification goes faster and finds fewer surprises when it is planned (FAT-330). The test matrix lists every device, circuit and function from the device schedule and the cause-and-effect matrix, and the plan groups them by floor or zone so the crew can move efficiently. The contractor's pre-test should have found and fixed most faults; a verification that finds dozens of basic wiring faults means the pre-test was not done properly. The monitoring company, the building operator, the elevator contractor and the other trades are scheduled for the times their systems are involved.

# Verification plan: crew hours by floor from device counts (illustrative minutes per device)
minutes = {"smoke": 4, "heat": 4, "manual station": 3, "notification": 2, "module": 5}
floors = {
    "Level 1": {"smoke": 22, "heat": 6, "manual station": 4, "notification": 30, "module": 12},
    "Level 2": {"smoke": 34, "heat": 2, "manual station": 4, "notification": 38, "module": 8},
    "Level 3": {"smoke": 34, "heat": 2, "manual station": 4, "notification": 38, "module": 8},
}
total = 0
for floor, counts in floors.items():
    m = sum(minutes[k] * n for k, n in counts.items())
    total += m
    print(f"{floor}: {sum(counts.values())} items, about {m / 60:.1f} crew hours")
print(f"Total about {total / 60:.1f} crew hours, before integrated testing")

Level 1: 74 items, about 4.1 crew hours
Level 2: 86 items, about 4.5 crew hours
Level 3: 86 items, about 4.5 crew hours
Total about 13.1 crew hours, before integrated testing

Device-by-device

NFPA 72 requires 100 percent of devices and functions to be tested at acceptance (FAT-330). For each initiating device, the technician confirms its type, location and label match the record drawings, that it is installed correctly, and that it initiates the right signal. For each notification appliance, the technician confirms operation, audibility and synchronization. For each circuit, the technician confirms the class performance by introducing opens, shorts and ground faults as Chapter 12 describes. For the control unit, every function, including loss of primary power and battery operation. Results go on the test forms and the record of completion.

Integrated testing

When fire alarm, sprinklers, elevators, smoke control, door hardware and other systems interact, NFPA 4 requires integrated testing that proves the interactions work as designed (FAT-330). The integrated testing agent writes a test plan from the sequences of all the systems, and each scenario is run with every affected trade present. A common finding is timing: a door that releases late, a fan that restarts after reset, an elevator that recalls to the wrong level.

# Integrated test scenario: did each output happen, and in time?
expected = {"elevator recall to level 1": 10, "AHU-3 stop": 10, "smoke doors 4-East release": 10, "stair door locks release": 10}
observed = {"elevator recall to level 1": 6, "AHU-3 stop": 4, "smoke doors 4-East release": 14, "stair door locks release": 3}
for out, limit in expected.items():
    t = observed.get(out)
    result = "missing" if t is None else ("pass" if t <= limit else f"late ({t} s)")
    print(f"{out:<30s} limit {limit:>2d} s  {result}")

elevator recall to level 1     limit 10 s  pass
AHU-3 stop                     limit 10 s  pass
smoke doors 4-East release     limit 10 s  late (14 s)
stair door locks release       limit 10 s  pass

The ten-second limits in the code are the test plan's figures for this scenario, not values from a standard. The smoke doors on 4-East released late because the door holder's power supply was on a delay meant for a different set of doors; the fix was in the door hardware, and the scenario was run again.

Deficiencies, reports and handover

Deficiencies found during acceptance testing are listed, corrected and retested before acceptance (FAT-330). The record of completion is filled out and signed, describing the system, its components, its circuits and its testing, and copies go to the owner and the authority. The handover package gives the owner the record drawings, the record of completion, the sequence of operation, the software, the manuals and the training, and makes clear that the owner is now responsible for inspection, testing and maintenance.

Practice set: commissioning

Captain Strand sat in on one of Gerry's review evenings and set these questions from the fire department's side of an acceptance test.

Question 1. The acceptance test is finished, but two devices failed and are waiting for parts. Can the record of completion be signed as complete? Answer: not as complete. The outstanding items are listed, and those devices are retested once they are corrected. The authority decides whether occupancy can proceed with the items outstanding.

Question 2. The fire department asks to see the elevator recall operate from the lobby smoke detector. The contractor says it was tested last week. What happens? Answer: the witness test is done again with the authority present, if the authority asks. A test the authority did not witness may be accepted on the record, but the authority can ask to see it.

Question 3. A device was added after the acceptance test was complete. What is needed? Answer: the added device, and anything it controls, is tested, and the record of completion is updated. NFPA 72 calls this a reacceptance test: changes are tested, along with any function they could affect.

Question 4. During the integrated test, the fire alarm signals the smoke control system, but the stair pressurization fan does not start. Whose problem is it? Answer: the integrated test's job is to find exactly this. The fire alarm technician confirms the output was sent; the mechanical contractor checks the fan's controls. The test is repeated until the whole sequence works, and the results are recorded for all the systems involved.

Question 5. An annunciator shows 'Zone 7' for every device on the third floor, but the floor has three areas that firefighters need to tell apart. Is that acceptable? Answer: the descriptions must be specific enough for responders to find the alarm. The descriptions are corrected and retested.

Question 6. The system passed its tests, but the as-built drawings were not delivered. Is the project complete? Answer: no. Documentation is part of the deliverable: drawings, the cause-and-effect matrix, the program, the test records, the manuals and the training record. Lesson 10's checklist lists them.

The commissioning sequence

Exam questions about commissioning often ask who is responsible for a step, or which document records it. The sequence in the table is the order on most projects, though the steps overlap on large jobs.

Testing when the system is partly occupied

Large projects are often handed over floor by floor, so part of the building is occupied while other floors are still being tested. The fire alarm on the occupied floors must stay in service. Testing on the construction floors must not sound the alarm on the occupied floors, and an alarm in the occupied floors must still work fully. The technician works with the building's management and the authority on a plan: which zones are disabled for testing, how occupants are warned, and how the monitoring company is kept informed. A mistake here can either evacuate a hospital floor for nothing or, worse, leave occupied areas without protection.

What the authority looks for

Captain Strand ended the evening with the four things he checks on every final inspection in Charlotte. Firstly, the annunciator: at the entrance, with clear descriptions and a zone map. Secondly, the documents: the record of completion, the drawings and the matrix, on site and current. Thirdly, the functions he cares most about as a firefighter: elevator recall, door release, smoke control and the supervising station signal, which he asks to see operate. Fourthly, the building's people: someone on site who knows how to silence, acknowledge and reset the panel, and who to call. 'If those four are right,' he says, 'I usually find the rest is right too. If one is wrong, I start looking harder.'

Nadia asks what the most common failure is. He does not hesitate: descriptions. A panel that says 'Zone 3' when a firefighter needs 'Floor 3 east corridor' costs time on the worst night of someone's life. The second most common is a monitoring signal that was never tested from the building to the receiving center and back.

Training the owner

Handover includes training the people who will live with the system. The owner's staff learn what each signal means, how to acknowledge and silence, when they may reset and when they must not, how to read the annunciator, and whom to call for service and for monitoring. They are shown where the documents are kept and how to arrange the periodic inspections. The training is recorded with the names of those trained and the date, and the record goes with the handover documents. An exam question that asks what completes the handover expects training among the answers, not just the test results.