1. Bus short-circuit isolators should be installed on the system bus, and the total number of fire detectors, manual fire alarm systems, and modules protected by each bus short-circuit isolator should not exceed 32 points.

Question: Does 32 points refer to address encoding or the number of devices? How many address codes does the I/O module occupy?

Answer: 32 points refer to the total number of devices rather than the number of address codes, and multiple input/output modules count as one device.

2. The main power supply of the fire alarm system should not be equipped with residual current action protection and overload protection devices.

Question: The operation of the automatic fire alarm system is a long-term process, and it is possible that a fire will not occur for decades. If overload protection is not set up, the line and equipment will be overloaded for a long time without being detected, which will seriously affect the safe operation of the line and equipment, and the aging of the line will increase, posing safety hazards?

Answer: The main power supply of fire automatic alarm systems and other fire protection systems is the fire power supply, and the selection requirements for power supply lines are higher than those of other systems. Moreover, the functional characteristics of fire protection systems determine that many fire protection equipment are usually in a "standby" servo working state, so there is no need to set up residual current monitoring devices; The occurrence of a fire has a high degree of randomness, and fire-fighting equipment must be in a state of readiness at all times. Therefore, it is not allowed to cut off the fire-fighting power supply due to leakage current exceeding the set threshold. Therefore, residual current detectors should not be installed on the fire-fighting power supply, and residual current protection devices should not be installed.

In order to ensure the effectiveness of fire protection equipment in emergency situations such as fires, there is a certain margin of power supply load for the fire protection power supply. Even if overload occurs due to equipment or circuit reasons in emergency situations, it is not allowed to cut off the fire protection power supply and the fire protection equipment should be kept in working condition. Therefore, overload protection devices should not be installed on fire power lines.

The fire power monitoring system is a monitoring system specifically designed to monitor the working status of the power supply of fire equipment. It can send out alarm signals in the event of overvoltage, undervoltage, overcurrent, and phase loss faults in the power supply. The status of the power supply of fire equipment should be monitored by the fire power monitoring system. Fire alarm controllers, fire linkage controllers, and other equipment that have the function of monitoring overvoltage, undervoltage, overcurrent, and other faults in the power supply can be exempted from using fire power monitoring systems to monitor their power status; Firefighting equipment such as rolling door machines for fireproof rolling shutters that do not have corresponding functions should use a fire power monitoring system to monitor the working status of their power supply.

3. On either side of the rolling shutter, no less than 2 temperature and fire detectors specifically designed for linked fire shutters should be installed within a depth of 0.5m-5m from the rolling shutter.

Question: It is required to install at least 2 temperature sensitive fire detectors specifically designed for linked fire shutters on either side. Is it set on one side or on both sides?

Answer: On both sides of the fireproof roller shutter, the vertical depth from the roller shutter is 0 Within 5 meters to 5 meters, at least 2 temperature sensitive fire detectors specifically designed for linked fire shutters should be installed.

4. After confirming the fire, start from the alarm area where the fire occurred and sequentially activate the fire emergency lighting and evacuation indication system for the entire building evacuation passage. The activation time for all systems to be put into emergency mode should not exceed 5 seconds.

Question: Why is it required to start in sequence? Do sound and light alarms and emergency broadcasts need to be activated in sequence? Does 5 s refer to the time required from triggering the linkage conditions to activating the emergency lighting and evacuation indication system for the entire building?

Answer: The alarm area is divided according to the fire compartment or floor of the protected object, and personnel evacuation during a fire is also carried out according to the fire compartment or floor. Within 5 seconds, the emergency lighting and evacuation guidance system can be activated in the order of fire occurrence area → adjacent area → then adjacent area, which can fully meet the requirements of safe evacuation of personnel; Moreover, this time-sharing starting method can also reduce the impact of equipment starting current on the fire power supply. On the premise that the fire power load meets the requirements, the emergency lighting and evacuation indication system of the entire building can also be activated simultaneously.

There are numerous fire alarms and fire emergency broadcast speakers installed inside the building. In order to ensure the effective transmission of fire alarm information and emergency broadcast information, it is necessary to ensure the synchronization of the operation of the fire alarm and fire emergency broadcast speakers. Therefore, the fire alarm and fire emergency broadcast speakers inside the building must be activated simultaneously.

According to the different forms of emergency lighting and evacuation indication systems and automatic fire alarm systems, the command to put the emergency lighting and evacuation indication system into emergency state can be issued by the fire alarm controller or fire linkage controller. Within 5 seconds after the fire alarm controller or fire linkage controller sends the control command, all emergency lighting and evacuation indication systems in the entire building should be activated.

5. The opening, closing, and fault status signals of each fire door on the evacuation channel should be fed back to the fire door monitor.

Question 1: Is there currently a product like a fire door monitor available? If not, there are many monitoring points for all (including normally open and normally closed) fire doors, and it is difficult to implement it solely by relying on the fire linkage controller. Can we only monitor normally open fire doors? If the fire door is not electric, is it necessary to add an electric device when the linkage trigger signal for normally opening and closing the fire door activates the door closer?

Answer: The fire door monitor is a control device used to display and control the opening and closing status of fire doors. The national standard GB 29364-2012 "Fire Door Monitor" for this product was implemented on July 1, 2013. At present, fire door monitor products have been sent for inspection by the National Fire Electronic Product Quality Supervision and Inspection Center, and corresponding products will soon be launched on the market.

The fire doors set up in the protected objects have the function of fire separation. If the fire doors are not tightly closed due to component damage or other reasons, they cannot prevent smoke from spreading and spreading to other areas, and thus cannot function as fire separation. Controlling the closure of normally open fire doors, monitoring the working status of normally open and normally closed fire doors, can effectively monitor the effectiveness of these fire separation measures, and prompt fire management personnel to repair and maintain fire doors with abnormal conditions in a timely manner. Therefore, the fire control room should be able to control the closure of normally open fire doors and monitor the working status of normally open and normally closed fire doors.

For normally open fire doors that use mechanical door closers, a fire door electromagnetic release device can be installed on the fire door to control the closing of the fire door, and a fire door magnetic switch can be installed on the normally open and normally closed fire doors to monitor the closing status of the fire door; Mechanical door closers can also be replaced with electric door closers, which can control the closure of fire doors and monitor and provide feedback on the status of fire doors.

Question 2: Can the fire door be directly connected to the alarm system using a module without the need for a separate fire door monitor? If it is in a multi story building without an automatic fire alarm system, how to achieve it? Is it necessary to set up an area alarm system for several normally open fire doors at this time?

Answer: The electromagnetic release and electric door closer of fire doors have high starting and maintaining currents, which require high power supply loads. At the same time, the control and feedback requirements of normally open fire doors are different from other system components (the normally open fire door closing contact is always in the unclosed state, but no fault alarm should be triggered at this time. In emergency situations, if the normally open fire door is controlled to close and the normally open fire door closing contact is not closed within the set time, a fault alarm should be triggered. With such a complex control sequence, it is difficult to implement a fire linkage controller). Therefore, to ensure the stability and reliability of the overall operation of the system, the control and status monitoring of fire doors should be carried out by a dedicated fire door monitor.