Fire alarm system debugging steps classic tutorial
1. Check whether the system installation meets the design requirements according to the system design drawings. 2, check the system line, right or wrong line, open circuit, short circuit, welding and other processing, to ensure that the line is normal.
Fire alarm system commissioning procedure
Preparation before starting up
1. Check whether the system installation meets the design requirements according to the system design drawings.
2, check the system line, right or wrong line, open circuit, short circuit, welding and other processing, to ensure that the line is normal.
3. Check whether the ground insulation resistance of the system line and the grounding of the system meet the requirements of the Code for Construction and Acceptance of Automatic Fire Alarm System. The ground insulation resistance should not be less than 20 megohm.
4. Power-on and check the alarm (linkage) controller, fire display panel, broadcast intercom, special computer for fire alarm, power supply and other equipment one by one. The system debugging can be carried out after the equipment is normal.
Start up debugging
The debugging of automatic fire alarm system and linkage system mainly includes the connection, login, linkage relationship establishment of the automatic alarm system's own components and the input and simulation of fire signal check whether each system is executed in accordance with the prepared logic relationship. The process is divided into the following steps:
Step 1: Loop division
The alarm system is divided into regions (loops) according to the number of loops of the alarm host, and a permanent clear mark is made for the loop bus. Mark on the as-built drawing all the content design changes related to location changes and quantity increases and decreases occurred in the construction process, so that no omissions will occur in the next work.
Step 2: Encode the address
Mark the address numbers of detectors and modules on the drawings, code the detectors and various modules (monitoring and control modules) according to the drawings, and ensure that the codes of installed detectors and modules are consistent with the numbers indicated on the drawings. In this way, the device can be installed according to the specified address to prevent address errors during device installation. The address number also provides the linkage logical input number for the linkage relationship. After setting the address number, calibrate the name of the installation position of the device according to the requirements of the device, so that the alarm controller can display the name of the alarm point.
Note: The intelligent detector and module have the function of online address writing, because the line may be broken, short circuit, wrong line and other line problems, so that the online address writing is difficult. Therefore, you are advised to write the addresses of detectors and modules before installing them. This improves debugging efficiency.
Step 3: Programming
The Engineering Address Code Table is sorted out according to the numbers of detectors and various modules, and the display relationship, system information and linkage relationship are programmed according to the Engineering Address Code Table and the control requirements of the system fire fighting equipment.
Step 4: Connect to the alarm bus
Check again and record that the insulation impedance of the circuit meets the specification requirements. Use a multimeter to measure that there is no AC or DC voltage between all external lines or between external lines and the ground (ensure that no interference voltage is introduced into the system by external lines) and that the load of the system does not exceed the required capacity. Connect the bus to the controller (do not connect the 24V power cable, broadcast cable, and fire intercom telephone line). The bus connected to the controller should be permanently marked clearly.
Note: Do not connect unchecked lines to the host. The wiring should be firm, no more than two wire joints can be connected to each contact, the wiring head should not have obvious bifurcations, all lines and wires should be permanently numbered or marked, the guide should be classified and neatly bundled, the overall wiring should be brief and beautiful, meet the requirements of the specification. The access line holes in the main engine should be blocked to prevent foreign bodies from entering. Switch off the controller and power supply when connecting cables.
Step 5: Start the machine and troubleshoot the fault
Turn on the main power of the controller first and then the backup power to power on the controller. When the system is powered on for the first time, there may be faults or fire alarms in the system. The elimination method can be used to eliminate line faults, equipment open-circuit faults, detector faults, module faults and so on one by one. Only after the external faults are removed, can the following work be carried out.
Step 6: Check the external cables of the module
Disconnect the external 24V power cable, manually start the control module of the external device, and check the resistance between the 24V power cables to ensure that there is no short circuit between them. Check the insulation resistance of the 24V power cable to ensure that the insulation resistance meets the requirements.
Note: With the increase of the number of startup modules, the inter-wire resistance will gradually decrease. Sometimes, it is necessary to start the modules in batches, layers or by device type, and then check the inter-wire resistance. After checking one part, the resistance is reset, and then check the next part. When checking the insulation resistance of a line to the ground, use a 500V meter. A multimeter with a measuring range of 20 mω or less is inaccurate. Disconnect the external fire broadcast line, manually start the broadcast control module, check the resistance between the broadcast lines, ensure that there is no short circuit between the lines; Check the insulation resistance of the broadcast line to ensure that the insulation resistance of the line to the ground meets the specifications.
Note: With the increase of the number of starting modules, the number of speakers is also increasing, and the inter-line resistance will gradually decrease. Sometimes it is necessary to start the module in layers, check the inter-line resistance layer by layer, and reset the controller after each layer is checked, and then start another layer after the completion of the check until the completion of the check.
Step 7: Connect the 24V power cable and broadcast cable
Connect the 24V power cable and the fire broadcast cable, set the controller to the manual state, and start all the linkage devices one by one to ensure that the device startup meets the specifications and the positions of the devices are consistent with the drawings. Modify the parts that cannot be started or are inconsistent with each other until the system is normal.
Step 8: Alarm test
Carry out simulated alarm test on detector, hand alarm, monitoring module and other alarm points one by one to ensure that each point can alarm normally, and its location is consistent with the alarm plan. For devices that do not alarm and false alarm, timely processing and re-test; If the location and device are incorrect, modify them to ensure consistency.
Description: Alarm points include smoke, temperature, hand alarm, fire hydrant, water indicator, signal valve, pressure switch, etc.
Step 9: Linkage test
Set the controller to automatic state, and conduct simulated fire alarm test on the alarm alarm point. Check whether the action of the equipment directly output is carried out according to the set conditions, and modify the inconsistent places until all the correct; Check whether the linkage of controlled devices meets the linkage control requirements, and modify the inconsistencies until they are correct.
Operation and acceptance
After the simulation alarm and linkage test of the system is completed, the system should be powered on for operation. Construction is strictly prohibited during operation to ensure system safety. After 120 hours of trouble-free operation of the system, complete the Project Commissioning Completion Form for acceptance.