What are the debugging steps for the fire alarm system? The Siemens fire alarm system manufacturer will provide you with specific instructions below

Preparation work before starting up

1. Check whether the system installation meets the design requirements based on the system design drawings.

2. Check the system wiring and handle any errors, open circuits, short circuits, or solder joints to ensure that the wiring is functioning properly.

3. Check whether the insulation resistance of the system circuit to the ground and the system grounding meet the requirements of the Construction and Acceptance Specification for Fire Automatic Alarm Systems. The insulation resistance to the ground should not be less than 20 megaohms. When using dedicated grounding, the ground resistance to the ground should not exceed 4 ohms. When using joint grounding, the ground resistance to the ground should not exceed 1 ohm.

4. Power on and inspect the alarm (linkage) controller, fire display panel, broadcasting intercom, fire alarm dedicated computer, power supply, and other equipment one by one. Only after they are normal can system debugging be carried out.

Startup debugging

The debugging of the automatic fire alarm system and linkage system mainly includes the connection and login of the components of the automatic alarm system, the formulation of linkage relationships, and the input and simulation of fire signals to check whether each system is executed according to the logical relationships formulated. The process is divided into the following steps:

Step 1: Circuit division

Divide the alarm system into zones (circuits) based on the number of alarm host circuits, and permanently mark the circuit bus with clear markings. Mark all design changes related to changes in location, quantity, etc. that occur during the construction process on the completion drawing, so that there are no omissions in the next step of work.

Step 2: Address

Mark the address numbers of the 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 the installed detectors and modules are consistent with the numbers indicated on the drawings. In order to install according to the predetermined address and prevent address errors during device installation, this address number also provides a logical input number for the linkage relationship. After setting the address number, calibrate the name of the device installation location according to the equipment requirements, so that the alarm controller can display the name of the alarm point.

Attention: The detector and module have the function of writing addresses online, as there may be issues with the circuit such as disconnection, short circuit, and incorrect wiring, making it difficult to write addresses online. Therefore, it is recommended to write the addresses of the detectors and modules before installation, which can improve the efficiency of debugging work.

Step 3: Programming

Organize the "Engineering Address Code Table" based on the numbering of detectors and various modules, and program the display relationship, system information, and linkage relationship according to the "Engineering Address Code Table" and the control requirements of the system fire equipment.

Step 4: Connect the alarm bus

Check and record again that the insulation impedance of the circuit meets the specification requirements. Measure with a multimeter that there is no AC or DC voltage between all external lines and between the external lines and the ground (confirm that there is no interference voltage introduced into the system by the external lines). After confirming that the system load does not exceed the required capacity of the system, the bus can be connected to the controller (do not connect the 24V power line, broadcast line, or fire intercom telephone line for now). The bus connected to the controller should be permanently and clearly marked.

Attention: It is strictly prohibited to connect unchecked lines to the host. The wiring should be reliable, with no more than two wire joints connected at each contact point. The wiring heads should not have obvious forks, and all lines and wire heads should have permanent numbers or markings. The conductors should be classified and tied neatly, and the overall wiring should be concise and beautiful, meeting regulatory requirements. The inlet and outlet holes inside the host should be sealed to prevent foreign objects from entering. The controller and power supply must be turned off when wiring.

Step 5: Power on and troubleshoot

First, turn on the main power of the controller, then turn on the backup power for power on operation. During initial power on operation, the system may experience malfunctions or fire alarms. Troubleshooting methods can be used to eliminate line faults, equipment open circuit faults, detector faults, module faults, etc. Only after external faults have been resolved can subsequent work proceed.

Step 6: Check the external wiring of the module

Disconnect the external 24V power line, manually start the control module of the external equipment, check the resistance between the 24V power lines, and ensure that there is no short circuit between the lines; Check the ground insulation resistance of the 24V power line to ensure that the insulation resistance of the line meets the specification requirements.

As the number of startup modules increases, the inter line resistance will gradually decrease. Sometimes, it is necessary to start the modules in batches, layers, or equipment types, check the inter line resistance, reset after checking a part, and check the next part after resetting; When checking the insulation resistance of the circuit to ground, a 500V megohmmeter should be used, and the insulation resistance tested with a multimeter with a range of 20M Ω or less is inaccurate. Disconnect the external fire broadcast line, manually start the broadcast control module, check the resistance between the broadcast lines, and ensure that there is no short circuit between the lines; Check the ground insulation resistance of the broadcasting line to ensure that the insulation resistance meets the specification requirements.

Step 7: Connect the 24V power line and broadcasting line

Connect the 24V power line and fire broadcast line, set the controller to manual mode, start all linked equipment one by one, ensure that the equipment starts up in accordance with the specifications, ensure that the position of the equipment is consistent with the drawings, and make modifications to areas that cannot be started or are inconsistent until the entire system is normal.

Step 8: Alarm Test

Simulate alarm tests on detectors, manual alarms, modules, and other alarm points one by one to ensure that each point can alarm normally and its position is consistent with the alarm plan. For equipment that does not alarm or alarms incorrectly, timely handling and retesting are necessary; Any incorrect location and equipment should be modified to ensure consistency.

Explanation: Alarm points include smoke, temperature, manual alarm, fire hydrant, water flow indicator, signal valve, pressure switch, etc.

Step 9: Linkage test

Set the controller to automatic mode and conduct simulated fire alarm tests on the alarm points; Check whether the actions of various direct output devices are carried out according to the set conditions, and modify any discrepancies until they are all correct; Check if the linkage of the controlled equipment meets the linkage control requirements, and make modifications to any discrepancies until all are correct.

Operation and acceptance

After simulating alarms and conducting linkage tests on the system, the system should be powered on for operation. Construction is strictly prohibited during operation to ensure system safety. After running the system without faults for 120 hours, fill out the Engineering Debugging Completion Form and prepare for acceptance.