A new specification for the design of automatic fire alarm systems that must be seen

1. Only 24 of the new regulations are mandatory provisions, and the original norms are mandatory national standards (understand that all provisions are mandatory).

2. Article 3.1.5: “The total number of devices and addresses of fire detectors, hand reports, linkage modules, etc. connected by any fire alarm controller shall not exceed 3200 points, of which the total number of connected devices per bus loop It should not exceed 200 points, and should have a margin of not less than 10% of the rated capacity." (new additions)

Interpretation: In other words, each bus loop can connect up to 180 devices (refer to the connected device, not the number of encoded addresses).

Note: The original specification 5.1.2: “The fire alarm controller capacity and the total number of address codes of the fire detector and control module or signal module connected to each bus loop should have a certain margin.”

3. Section 3.1.6: “The short-circuit isolators shall be provided on the system bus. The total number of fire-fighting equipment such as fire detectors, manual alarm buttons and modules protected by each bus short-circuit isolator shall not exceed 32 points; when the bus crosses the fire partition , the bus short-circuit isolators should be set at the crossing." (new additions)

Interpretation: That is to say, from the weak electric well terminal box, it is necessary to separate the alarm lines from the circuit, and each line can connect up to 32 points in series. The route through the fire zone should be taken separately from the weak well. The short-circuit isolators should be placed in the weak electric well terminal box, and pass through the fire partition, and the bypass box of the short-circuit isolator can be laid down.

4. Article 3.1.7: “In buildings with a height of more than 100m, except for the controllers installed in the fire control room, the fire detectors, manual alarm buttons and modules directly controlled by each controller shall not cross the refuge floor” . (new additions)

Interpretation: That is to say, the fire detector, manual alarm button and module between the refuge floor should be equipped with a fire alarm controller separately (I understand that the output loop of the same alarm controller should not cross the evasion layer).

5. Article 3.1.8: “Fire-fighting electric control devices such as pump control cabinets and fan control cabinets should not adopt variable frequency starting mode”. (new additions)

Interpretation: Whether soft start is OK, not mentioned. The better treatment method is: 35KW or less can be started directly, and more than 35KW should be started with pressure reduction (star type - triangle type, 2 pipes should be placed to the water pump. If it is 1 pipe, the pipe diameter should be enlarged, Consider 2 cables or 7 wires from the control cabinet to the pump).

6. Section 3.2.3: “The centralized alarm system shall be composed of fire detectors, manual fire alarm buttons, fire and sound alarms, fire emergency broadcasts, fire-only telephones, fire control room graphic display devices, fire alarm controllers, fire protection The linkage controller is composed of ".

Interpretation: In other words, the new specification is clear: a graphical display needs to be configured.

Note: The original specification 5.2.3: "The system should be equipped with a centralized fire alarm controller and two or more regional fire alarm controllers, or a fire alarm controller and two or more regional displays. Fire-fighting linkage control equipment shall be provided. The centralized fire alarm controller or fire alarm controller shall be able to display the fire alarm part signal and control signal, and also perform linkage control."

7. Article 3.3.3.3: “Electrical pipe wells, communication pipe wells, cable tunnels, building roofs, mezzanines, etc.” shall be separately classified into detection areas.

Interpretation: That is to say, water pipes, air-conditioning wells, etc. can be considered without setting up detectors (conditions or settings).

Note: The original specification 4.2.3.: “Aisle, ramp, pipe well, cable tunnel, building roof, mezzanine” should be divided into detection areas.

8. Article 3.4.8.5: “When the fire control room is used together with other weak current systems of the building, the fire fighting equipment shall be set centrally and shall have obvious separation between other equipment”. (new additions)

Interpretation: In other words: the monitoring room can be used in conjunction with the fire control room, as long as the internal separation is sufficient.

9. Article 4.2.1 stipulates: “The wet alarm valve pressure switch directly controls the automatic spray fire pump”. (new additions)

10. In Article 4.3.1, “When the fire hydrant button is set, the action signal of the fire hydrant button shall be used as the alarm signal and the linkage trigger signal of the fire hydrant pump shall be activated, and the fire linkage controller shall control the start of the fire hydrant pump.”

Interpretation: In other words, the fire hydrant button does not need to directly activate the fire hydrant pump, but only transmits the signal to the fire control room (the original method is easy to malfunction and start the fire hydrant pump).

Note: The original specification 6.3.2: “Fire control equipment shall have the following control and display functions for the indoor fire hydrant system: control the start and stop of the fire pump;”

11. Article 4.5.1 stipulates: “The alarm signals of two independent smoke detectors near the wall of the electric cigarette holder shall be used as the linkage trigger signal for the falling of the vertical wall of the electric cigarette, and shall be linked by the fire linkage controller. Control the landing of the electric smoke blocking wall." (new additions)

Interpretation: In other words, it is controlled by the fire center. It is not controlled by the detectors near the equipment. The signal output by the detector is only transmitted to the fire control room as a trigger signal.

12. In 4.5.3, “The start and stop buttons of the smoke prevention and exhaust fan shall be directly connected to the manual control panel of the fire linkage controller installed in the fire control room, and the smoke control shall be directly controlled manually. , start and stop of the exhaust fan"

Interpretation: In other words, the smoke prevention and exhaust fan should be separate control lines (multi-line system must be).

Note: The original specification 6, 3.1.1.2: “The start, stop and automatic control of the fire pump, smoke control and exhaust fan should also be able to be directly controlled manually.”

13. Section 4.6.3.1 stipulates: “There shall be no less than 2 temperature-sensitive fire detectors dedicated to the joint fire shutters on any side of the rolling door within 0.5~5m of the roller blind.”

Interpretation: In other words, on both sides of the fire shutter door on the evacuation channel, in addition to the smoke detector, two temperature-sensitive fire detectors must be installed on each side.

Note: For the original specification 6.3.8.1: “The fire detector group and its alarm device shall be provided on both sides of the fire curtain on the evacuation channel, and manual control buttons shall be provided on both sides;”

14. Section 4.7.2: “Elevator operation status information and feedback signals stopped at the first floor or conversion floor shall be transmitted to the fire control room for display. A dedicated telephone that can directly communicate with the fire control room shall be provided in the car”.

Interpretation: That is to say, there should be a module and a fire telephone extension at the elevator control box in the elevator machine room. The elevator five-way intercom host should be set in the fire control room (it can also solve the call between the car and the fire control room).

Note: The original specification 6.3.1.9: “After confirming the fire, the fire control room should be able to control the elevator to stop at the first floor and receive its feedback signal.”

15. Article 4.8.1: “The fire alarm system shall be equipped with a fire sound and light alarm, and all fire and sound alarms in the building shall be activated after the fire is confirmed”.

Note: The original specification 5.5.: “The fire alarm system without fire emergency broadcast shall be equipped with a fire alarm device. At least one fire alarm device shall be provided for each fire zone. The location shall be located at each floor walkway near the exit of the stairs. ."

16. Article 4.8.8: “The linkage control signal of the fire emergency broadcasting system shall be issued by the fire-fighting linkage controller. When the fire is confirmed, it shall be broadcast to the whole building at the same time”.

Note: The original specification 6.3.1.6: "In the case of a fire in a building of the second floor and above, the fire layer and its adjacent upper and lower layers should be connected first; if a fire occurs in the first floor, the ground, the second floor and the underground should be connected first. Layer; if there is a fire in the basement, the underground floors and the first floor should be connected first;"

17. Section 4.9.1.3: “The self-contained power supply non-centralized control type fire emergency lighting and evacuation indication system shall be realized by the fire linkage linkage controller in conjunction with the fire emergency lighting distribution box. (New additions)

Interpretation: When the emergency lighting comes with a battery, the forced switching is completed in the emergency lighting distribution box, which can meet the requirements.

18. Section 4.10.3: “The fire-fighting linkage controller shall have the function of opening the door and courtyard electric gate controlled by the access control system on the evacuation passage, and shall have the function of opening the parking box entrance and exit gear lever”. (new additions)

19. Section 5.2.2.3: “The following places should be selected for point-type smoke detectors: stairs, walkways, elevator rooms, garages, etc.”.

Interpretation: In other words, the underground garage should use a smoke detector instead of a temperature detector. Note: Article 7.2.5 of the original specification: “A place that meets one of the following conditions should choose a temperature detector: the relative humidity is often greater than 95%; smokeless fire;”

20. Clause 6.2.2.4: “The number of detectors required to be set in a detection area shall not be less than the formula: N=S/KA”.

Interpretation: That is to say, in public places with more than 10,000 people, K should take 0.7~0.8; 2000~10000 public places, K should take 0.8~0.9; 500~2000 public places, K should take 0.9~1; other places, K takes 1.

21. Article 6.2.12: “When a point type detector is installed in an elevator shaft or an elevator shaft, its position should be on the ceiling of the machine room above the shaft.” (new additions)

22. Section 6.4.1: “Each area of ​​the alarm should be set up with a regional display (fire display panel); hotels, restaurants, etc. should have an area display in each alarm area. When an alarm area includes multiple floors It is advisable to set up an area display that displays only this floor on each floor.

Note: The original specification 5.2.2.4: “When using a regional fire alarm controller or a fire alarm controller to guard multiple floors, it should be set at the obvious part of the stairway of each floor or the front room of the fire elevator. Identify the light display device on the fire floor."

23. Article 6.5.2: “The fire alarm shall be uniformly set in each alarm zone, and the sound pressure level shall not be less than 60 dB; in places where the environmental noise is greater than 60 dB, the sound pressure level shall be 15 dB higher than the background noise”.

Note: The original specification is 5.5.2: “At least one fire alarm device shall be provided for each fire compartment”; 5.5.3: “Sound pressure level of the audible alarm when the fire alarm device is installed in a place with an environmental noise greater than 60 dB Should be 15dB above background noise."

24. Section 6.7.4.1: “The computer network room should be equipped with a fire-fighting telephone extension”. (new additions)

25. Section 6.7.4.2: “With a manual fire alarm button or fire hydrant button, etc., a telephone jack should be set, and a manual fire alarm button with a telephone jack should be selected”.

26. 6.7.4.3: “Each refuge floor shall be provided with a fire-only telephone extension or telephone jack every 20m”. (new additions)

27. Article 6.7.5: “A fire alarm control room, a fire duty room or an enterprise fire station shall be provided with an external telephone that can directly report to the police”. (new additions)

28. Section 6.8.2: “The module is strictly prohibited from being placed in the power distribution (control) cabinet (box)”. (new additions)

29. Article 6.8.4: “There shall be a mark of not less than 100mm×100mm near the module that is not centrally set”. (new additions)

30. Article 8.1.2: “The flammable gas detection and alarm system shall be composed independently. The flammable gas detector shall not be connected to the detector circuit of the fire alarm controller; when the alarm signal of the flammable gas is to be connected to the automatic fire alarm system, It should be accessed by the flammable gas alarm controller." (new additions)

31. Article 11.2.2: “Fire-fighting automatic control system power supply line and fire-fighting linkage control line shall adopt fire-resistant copper core wire and cable, transmission line such as alarm bus, fire emergency broadcast and fire-fighting special telephone shall be flame retardant or flame retardant Wire and Cable".

Interpretation: That is to say, the power line and the linkage line must use fire-resistant wires or cables, and other fire-fighting lines can use flame-retardant wires or cables (better than the refractory series).

32. Article 11.2.5: “Cables of different voltage levels shall not penetrate into the same protection tube. When the same trunking is used, there shall be partitions in the trunking”. (new additions)

33. Article 11.2.6: “When laying horizontally through the pipe, except for the alarm bus, the lines of different fire zones shall not penetrate into the same pipe”. (new additions)

Note: The original specification 10.2.7: "The transmission network of the automatic fire alarm system should not be used in conjunction with the transmission network of other systems."

34. Article 12.4.1: “When a space with a height greater than 12 m, two or more fire detectors with fire parameters should be selected at the same time”.

35. Article 12.4.2: Spaces larger than 12m, “Where a large amount of smoke is generated in the early stage of the fire, a linear beam smoke detector, a line absorption smoke detector or an image type smoke detector should be selected. ".

36. Article 12.4.6: Space places with a height greater than 12 m, “Electrical lines shall be provided with electrical fire monitoring detectors, and electrical fire monitoring detectors with fault detection arc function shall be provided on the lighting lines”. That is to say, in a space place with a height greater than 12 m, an electrical fire monitoring detector with a function of detecting a fault arc should be provided on the lighting line.