BS5839-1:2017 45.4 Recommendations for inspection and test of the system over a 12 month period

 

In addition to the work recommended in 45.3, the following work should be carried out every year.

NOTE 1 The work described can be carried out over the course of two or more service visits during each 12-month period.

 

a) The switch mechanism of every manual call point should be tested, either by removal of a frangible element, insertion of a test key or operation of the device as it would be operated in the event of fire.

b) All automatic fire detectors and remote detectors should be examined, as far as practicable, to ensure that they have not been damaged, painted, or otherwise adversely affected. Thereafter, every detector should be functionally tested.

 

NOTE 2 The tests used need prove only that the detectors are connected to the system, are operational and are capable of responding to the phenomena they are designed to detect. Where fitted, detector remote indicators should also be checked for correct operation.

Information regarding the configuration of multi-sensor detectors and selection of types of detectors suitable for the application is given in Table E.1.

c) Every heat detector should be functionally tested by means of a suitable heat source, unless operation of the detector in this manner would then necessitate replacement of part or all of the sensing element (e.g. as in fusible link point detectors or non-integrating line detectors).

Special test arrangements are required for fusible link heat detectors. The heat source should not have the potential to ignite a fire; live flame should not be used, and special equipment might be necessary in explosive atmospheres.

d) Point smoke detectors should be functionally tested by a method that confirms that smoke can enter the detector chamber and produce a fire alarm signal (e.g. by use of apparatus that generates simulated smoke or suitable aerosols around the detector). It should be ensured

that the material used does not cause damage to, or affect the subsequent performance of, the detector; the manufacturer’s guidance on suitable materials should be followed.

e) Optical beam smoke detectors should be functionally tested by introducing signal attenuation between the transmitter and receiver, either by use of an optical filter (or any similar method of simulating obscuration by smoke), smoke or simulated smoke.

f) Aspirating fire detection and fire alarm systems should be functionally tested by a method that confirms that smoke can enter the detector chamber and produce a fire alarm signal. It should be ensured that the material used does not cause damage to or affect the subsequent performance

of the detectors; the manufacturer’s guidance on suitable materials should be followed. Furthermore, appropriate testing should be performed to verify that smoke is able to enter each sampling point (or collection of sampling points that are recommended by the manufacturer to

cover the same area as a point smoke detector).

NOTE 3 This can be achieved by introducing smoke into each sampling point in turn and verifying a response at the detector. However, where access is restricted or other site conditions prevent this, other verification techniques should be employed such as:

1) verifying transport time from furthest hole or a dedicated test point and comparing with previously recorded results to identify deviations;

 

2) confirming that the flow monitoring is capable of detecting loss of a single sampling point (or collection of sampling points that are deemed to be acceptable for the risks involved);

3) inspection of flow readings and comparing with previously recorded results to identify deviations which would indicate a loss of detection performance; or

 

4) measurement of the pressure at each sampling point and comparing with previously recorded results to identify deviations which would indicate a loss of detection performance. The technique used is dependent on the particular features of the ASD technology, the risk and

details of the specific application. Such techniques may also be supported by visual inspection of sampling points where this is possible but it should be verified that adequate detection performance is maintained. Details of the techniques used should be recorded and agreed with all parties.

NOTE 4 For further guidance see the FIA Code of Practice for Design, Installation, Commissioning and Maintenance of Aspirating Smoke Detector (ASD) Systems [7].

 

g) Carbon monoxide fire detectors should be functionally tested by a method that confirms that carbon monoxide can enter the detector chamber and produce a fire alarm signal (e.g. by use of apparatus that generates carbon monoxide or a gas that has a similar effect on the electro- chemical cell as carbon monoxide).

 

        WARNING. Carbon monoxide is a highly toxic gas, and suitable precautions should be taken in its use.

NOTE 5 It is necessary to ensure that any test gas used does not cause damage to, or affect the subsequent performance of, the detector and that the manufacturer’s guidance on suitable test gases is followed.

h) Flame detectors should be functionally tested by a method that confirms that the detector responds to a suitable frequency of radiation and produces a fire alarm signal. The manufacturer’s guidance on the testing of detectors should be followed.

i) In fire detection systems that enable analogue values to be determined at the CIE, it should be confirmed that each analogue value is within the range specified by the manufacturer.

j) Multi-sensor detectors should be operated by a method that confirms that products of combustion in the vicinity of the detector can reach the sensors and that a fire signal can be produced as appropriate.

 

1) The guidance of the manufacturer on the manner in which the detector can be functionally tested effectively should be followed.

 

2) Multi-sensor fire detectors should be physically tested by a method that confirms that products of combustion in the vicinity of the detector can reach the sensors and that the appropriate response is confirmed at the CIE.

NOTE 6 Suitable test methods for each type of sensor are as described in this subclause, e.g. for heat sensors, see 45.4c).

 

3) Where the detector or system design permits, each sensor on which a fire detection decision depends (e.g. smoke, heat, CO) should be physically tested individually. Alternatively, individual sensors may be physically tested together if the detection system design allows simultaneous stimuli and individual sensor responses to be verified either individually or collectively.

NOTE 7 Where individual sensors cannot be tested individually, this recommendation does not apply.

NOTE 8 Where a system includes a time-related configuration of detection, care needs to be taken to ensure that a sensor is not excluded from being tested as a result of the time-dependent mode.

4) On completion of tests the system should be returned to its normal configuration.

k) All fire alarm devices should be checked for correct operation. It should be confirmed that visual fire alarm devices are not obstructed from view and that their lenses are clean.

NOTE 9 This test is intended to ensure that every fire alarm device operates in response to a fire alarm signal. It is not intended that sound pressure level measurements are made.

l) All unmonitored, permanently illuminated filament lamp indicators at CIE should be replaced.

m) Radio signal strengths in radio-linked systems to which Clause 27 applies should be checked for adequacy, and the results recorded.

 

n) A visual inspection should be made to confirm that all readily accessible cable fixings are secure and undamaged.

o) The cause and effect programme should be confirmed as being correct by activating at least one cause and observing the operation of the effects. Where there are different types of devices (e.g. manual call points and automatic fire detectors), one cause and its effects should be tested for

each type of device.

NOTE 10 Testing of a single cause is deemed acceptable and satisfies the recommendations of 45.3o). On a site with multiple cause and effect operations, if the user deems further causal testing is required, it is necessary for the user to specify this to the maintenance provider. Where no agreement is specified, testing of one cause will satisfy the recommendations.

p) The standby power supply capacity should be checked to establish it remains suitable for continued service.

NOTE 11 Further guidance on testing of the batteries is given in FIA Guidance: Testing of lead acid batteries used in Fire Detection & Alarm System Power Supplies [11].

q) A check should be made to determine whether a suitable zone plan (or other suitable diagrammatic representation) of the premises is provided on or adjacent to all CIE and repeat indicating equipment.

NOTE 12 Where repeat indicating equipment relates to only part of the premises, the adjacent zone plan need only relate to that part of the premises.

 

r) All further annual checks and tests recommended by the manufacturer of the CIE and other

components of the system should be carried out.

s) Video fire detectors should be subject to the manufacturer’s guidelines in relation to annual test and inspection. Any lighting provided specifically to aid the detection of flame or smoke should be regarded as an integral part of the video fire detection system. As such, its correct operation

should be confirmed, both in the presence of any mains supply to the lighting and the absence of such a supply. On completion of the work, any outstanding defects should be reported to the premises management and a record of the inspection and test should be made on the servicing certificate.

NOTE 13 Since stimulus of the sensing element through introduction of the phenomena or surrogate phenomena

which the above detectors are designed to detect forms part of the test, use of a test button or a test magnet (for

example) or compliance with 45.4i) does not satisfy the recommendations given.

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After twenty years in the London Fire Brigade and working at some of the busiest stations in London I am committed to

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