GB 15322.2-2026Combustible gas detectors - Part 2: Household combustible gas detectors (English PDF)

5.3.1 General Requirements

5.3.1.1 Standalone detectors should be powered by 220V AC voltage or batteries; system detectors using wired communication should be powered by 48V AC voltage. For systems powered by DC voltages of 220V and below, and using wireless communication, the detector should be powered by 220V AC voltage or a battery; external direct current... System detectors powered by a current-powered power supply should be powered by a combustible gas alarm controller and should have reverse polarity protection measures; those using battery power... The electrical detector should have a battery mounting structure to prevent reverse polarity connection, and there should be a clear warning sign when the battery is removed.

5.3.1.2 The alarm setpoint of the detector should be within the range of 5% LEL to 25% LEL, and its upper limit should not be less than twice the alarm setpoint and not less than... For detectors that detect carbon monoxide at 15% LEL, the alarm setting should be in the range of 150×10^-6 (volume fraction) to 300×10^-6 (volume fraction).

5.3.1.3 When the concentration of combustible gas in the monitored area reaches the alarm set value, the detector should be able to emit a combustible gas alarm sound and light signal. After the environment returns to normal, the detector should automatically (or manually) return to normal monitoring status within 60 seconds.

5.3.1.4 The enclosure protection rating (IP code) of the detector shall meet the requirements of IP30 rating specified in GB/T 4208-2017.

5.3.1.5 The model designation of the detector shall comply with the provisions of Appendix B of GB 15322.1-2026.

5.3.1.6 When the detector uses a non-metallic material casing, the casing's flammability shall meet the requirements of Appendix C of GB 15322.1-2026. Requirements for combustion performance testing.

5.3.2 Indicator Lights

5.3.2.1 The detector surface should have indicator lights to show its normal monitoring, fault, combustible gas alarm status, and gas sensor status. Lifespan status. The normal monitoring status indicator should be green; the fault or gas sensor lifespan expiration status indicator should be yellow; the alarm status indicator... It should be red.

5.3.2.2 Indicator lights should have Chinese function descriptions.

5.3.2.3 In an environment with an illuminance of no more than 500 lx, when the indicator light is on, the distance to the detector should be within a 22.5° viewing angle directly in front of it. The status of the indicator light should be clearly visible at a distance of 3 meters.

5.3.3 Display Devices Detectors with concentration display function should have their display devices illuminated directly in front of them in environments with illuminance levels of 100 lx to 500 lx. The information displayed on the device should be clearly visible within a 22.5° viewing angle and at a distance of 1m from the detector.

5.3.4 Terminal blocks For detectors with terminals, the function of each terminal should be clearly labeled. When using numbers or symbols to label functions, the corresponding application should be indicated. This is explained in the instruction manual.

5.3.5 Gas Sensor

5.3.5.1 When the detector uses a pluggable gas sensor or sensor assembly, it should have structural anti-detachment measures. Gas sensor or If a sensor component detaches, the detector should be able to send a fault signal within 30 seconds.

5.3.5.2 The detector should have a gas sensor lifespan status indication function and meet the following requirements.

a) The detector should have an independent yellow gas sensor life status indicator;

b) When the detector's cumulative operating time reaches the gas sensor's service life, the life status indicator light should flash and emit a signal indicating the presence of combustible gas. The alarm sound signals are distinctly different from the sensor's lifespan expiration sound signal;

c) The detector surface should have a clear label indicating that the gas sensor has reached the end of its lifespan and needs to be replaced;

d) The instruction manual for the detector should specify the service life of the gas sensor.

5.3.6 Network Interface The system detector should have a network interface that can connect to control and indication equipment, and the network interface should be able to output a value relative to the measured concentration. The signals should include those for normal monitoring, fault detection, alarm detection, and sensor lifespan status. Information such as signal type and parameters should be provided in the user manual. It is noted in the book.

5.3.7 Self-test function The detector should have a manual self-test function for its acoustic and optical components, and its control output interface should operate with a delay of 7 to 30 seconds during the self-test.

5.3.8 Historical Event Recording Function

5.3.8.1 The detector should have a timing device inside, and the daily timing error should not exceed 10 seconds.

5.3.8.2 The detector should have a historical event recording function, and the historical event records should be retained after the detector loses power. The types of records and the storage capacity of each type should meet the following requirements.

a) Detector alarm logs. no fewer than.200;

b) Detector alarm recovery records. no fewer than.200 entries;

c) Detector fault logs. no fewer than 100 entries;

d) Detector fault recovery records. no fewer than 100 records;

e) Detector power failure logs. no fewer than 50 records;

f) Detector power-on logs. no fewer than 50 records;

g) Detector silence logs. no fewer than 20 records;

h) Detector self-test records. no fewer than 20 records;

i) The activation signal emitted by the detector, which has the function of controlling electromagnetic gas emergency shut-off valves or dedicated electric valves for gas pipelines, is recorded. No fewer than 20 items;

j) A detector with the function of controlling electromagnetic gas emergency shut-off valves or dedicated electric valves for gas pipelines, and the received feedback signals are recorded. No fewer than 20 items;

k) A detector capable of receiving status information from other products, with at least 20 records of such information received;

l) Gas sensor failure record. no less than 1 record.

5.3.9 Wireless Communication Function

5.3.9.1 For detectors with wireless communication capabilities, in the network environment claimed by the manufacturer, the following event information should be provided after the event occurs. Send the information to the manufacturing enterprise platform within 2 minutes.

a) Combustible gas alarm information from the detector. combustible gas alarm concentration and alarm time;

b) Detector fault information. fault type, fault time;

c) Sensor lifespan expiration information. Sensor lifespan expiration time;

d) Detector power-off information. Detector power-off time;

e) Activation control signal information emitted by the detector (applicable only to those with control electromagnetic gas emergency shut-off valves or dedicated gas pipelines) (Detector for electric valve function). The time when the start control signal is sent;

f) Feedback signal information received by the detector (applicable only to those with control of electromagnetic gas emergency shut-off valves or dedicated electric gas pipelines) (Detector for valve function). the time when the feedback signal is received.

5.3.9.2 Detectors with wireless communication capabilities shall have a unique identification code, and the encoding method shall comply with the provisions of Appendix A.

5.3.9.3 Detectors with wireless communication capabilities should have wireless communication signal quality monitoring functions, and the network signal quality should meet the requirements of the producer. Under the claimed conditions, when the detector is powered on, it should report network signal quality and detector power-on time information once; under normal monitoring conditions, it should report once more. Report network signal quality at least once every 24 hours.

5.3.10 Noise reduction function Detectors for carbon monoxide should have silencing functions for fault and sensor lifespan expiration alarms, and combustible gas alarm signals should not be silenced. The alarm is silenced; other gas detectors should have silencing functions for combustible gas alarms, faults, and sensor lifespan expiration sounds. After silencing, the detector... The status light signal should be maintained until the detector returns to normal, and the following requirements must be met.

a) The detector should use the wireless infrared signal received from the remote control of household appliances as the silencing trigger signal and the button method to achieve the silencing function. Yes, system-type detectors cannot use combustible gas alarm controllers for silencing.

b) After a detector other than one that detects carbon monoxide issues a combustible gas alarm sound and light signal, the sound signal should not be eliminated within 60 seconds;

c) For detectors other than those detecting carbon monoxide, after using a mute button or a household appliance remote control to silence the combustible gas alarm signal, the monitored... If the concentration of combustible gas in the observation area consistently meets the alarm conditions, the detector should issue a combustible gas alarm again within 5 minutes. If the concentration of combustible gas in the monitored area still meets the alarm conditions, the combustible gas alarm audible signal should not be triggered again. Elimination time.

5.3.11 Instruction Manual The instruction manual for the detector should meet the requirements of GB/T 9969.The instruction manual should clearly specify the installation method and requirements for the detector.

5.4 Control Output Function

5.4.1 The type and capacity of the detector's control output shall be compatible with the matching products or actuators specified by the manufacturer, and shall be in accordance with the instructions for use. It is noted in the book.

5.4.2 The detector should activate the relevant control output within 30 seconds after issuing a combustible gas alarm signal.

5.4.3 Detectors with the function of controlling electromagnetic gas emergency shut-off valves or dedicated electric valves for gas pipelines shall meet the following requirements.

a) After the detector sends a start control signal, it should have a start status indication and be able to receive feedback signals. Upon receiving the feedback signal, it should... There is feedback indication.

b) After the detector alarms, it should be able to send a start control signal to the electromagnetic gas emergency shut-off valve or the dedicated electric valve for gas pipelines, and should be able to It receives feedback signals from electromagnetic gas emergency shut-off valves or dedicated electric valves for gas pipelines.

c) When the detector is connected to an electromagnetic gas emergency shut-off valve or a dedicated electric valve for gas pipelines via wired communication, when the detector... When the connection line between the detector and the electromagnetic gas emergency shut-off valve or the dedicated electric valve for gas pipelines is open-circuited or short-circuited, the detector should... The fault alarm signal should be issued within 100 seconds, and the fault alarm signal should be clearly distinguishable from the combustible gas alarm signal.

d) When the detector is connected to the electromagnetic gas emergency shut-off valve or the dedicated electric valve for gas pipelines via wireless communication, when the detector... When the connection with the electromagnetic gas emergency shut-off valve or the dedicated electric valve for gas pipelines is interrupted, the following requirements must be met. 1) One or more of the following. detector, electromagnetic gas emergency shut-off valve, or gas pipeline-specific electric valve, powered solely by battery. When the fault occurs, the detector should issue both audible and visual alarm signals within 5 minutes. The audible fault signal should be consistent with the audible combustible gas alarm signal. There are obvious differences; 2) When the detector, electromagnetic gas emergency shut-off valve, or dedicated electric valve for gas pipelines uses other power supply methods, the detector should... The fault alarm signal should be emitted within 100 seconds, and the fault alarm signal should be clearly distinguishable from the combustible gas alarm signal. 3) When the detector is connected to multiple electromagnetic gas emergency shut-off valves or dedicated electric valves for gas pipelines, the detector should indicate an interruption. Part number of the gas emergency shut-off valve or the gas pipeline special electric valve.

5.5 sound pressure level The detector operates at its rated voltage, under conditions indicating low battery power (applicable to detectors powered solely by battery or with a backup battery). Under these conditions, the combustible gas alarm, fault, and sensor lifespan expiration sound signals of the detector were measured 1m directly in front of the detector in a free sound field. The sound pressure level must meet the following requirements.

a) The initial peak sound pressure level of the alarm signal should not exceed 45 dB (A-weighted), and the peak sound pressure level should gradually increase during the period of 3 to 10 seconds. Increase to 70dB (A-weighted) ~ 115dB (A-weighted);

b) The peak sound pressure level of the fault or sensor lifespan expiration sound signal should not be less than 40 dB (A-weighted) and should not be greater than 60 dB (A-weighted).

5.6 Tensile strength performance of external wiring Detectors with external wiring (except those using terminal blocks) should be able to withstand a tensile force of 20 N for 5 seconds. After the test, the detector... The external wiring should not have any mechanical damage or detachment. When the power is turned on, the detector should be able to operate in a normal monitoring state.

5.7 Alarm Action Values The detector's alarm activation value should not be less than 5% LEL, and the absolute value of the difference between it and the alarm setting value should not exceed 3% LEL; Detector

1 For carbon monoxide detectors, the alarm trigger value should not be less than 50 × 10^-6 (volume fraction), and the absolute value of the difference between this and the alarm set value should not be greater than [a certain value]. At 50×10^-6 (volume fraction).

5.8 Range indication deviation The detector, equipped with a concentration display function, selects several test points within its range as reference values to ensure the concentration of combustible materials within the monitored area is within acceptable limits. The gas concentrations reached their respective reference values. When the detector's upper range limit is no greater than 50% LEL, the detector detects the combustible gas concentration at the test point. The absolute value of the difference between the displayed concentration value and the reference value should not exceed 3% LEL; when the upper limit of the detector's range exceeds 50% LEL, the detector... The absolute value of the difference between the displayed combustible gas concentration at the test point and the reference value should not exceed 5% LEL. (Detection of carbon monoxide) For the instrument, the absolute value of the difference between the concentration display value and the reference value should not exceed 80 × 10^-6 (volume fraction).

5.14 Battery Capacity

5.14.1 For detectors powered solely by batteries, discharge the battery for 30 days at 25 times the average operating current. After discharge, the battery capacity will ...