Access Control System Installation 1: Equipment Installation
1, front-end equipment
A. Install a card reader at the door. Do not approach or touch high-frequency or strong magnetic fields (such as heavy-duty motors, monitors, etc.) in the reader's sensing range, and the control box must be grounded.
B. Install the exit button at the exit.
C. The electromagnetic lock is installed on the top edge of the door and door frame.
D. To ensure safety and aesthetics, the controller and power box can be installed on-site or installed in weak electric wells. The advantage of installing the controller in the field is to save the use of wire rods. The controller is installed in the weak electric well to facilitate the system's future maintenance and system safety. The controller box can also be installed above the card reader near the electromagnetic lock. The specific situation can be selected according to the customer's installation.
2, in the control room equipment
A. The control panel and keyboard are installed on the facade wall or on the workbench.
B. The alarm device is placed in a place where the alarm effect is better.
C. Due to the special nature of the access control system, it is required to provide good power supply to the system. It is recommended to use the ups power supply to provide centralized power supply to the access control system.
Access Control System Installation II: Equipment Commissioning
1. After the installation of the system is completed, first access the host access card reader signal to the host, and then independently detect the situation of the access control card reader on the road, whether there is any missing report or false alarm. After this way, there is no problem and then it is connected to another way. In this way, each path is detected separately and all lines are connected after confirmation.
2. The management personnel can authorize according to the authority of the user. For example, some personnel can enter or leave an arbitrary place at any time. The ordinary person can only enter and leave the authorization scope within the authorized time. When all access points are normally turned on and turned on illegally, check whether the control center computer has a record.
3, try center computer can not be connected to the controller due to fault or other reasons, the controller can independently record the relevant information of the control point, when the central computer is connected, all the information can be automatically uploaded, whether it can ensure the integrity of the information record Sex.
4, make a good debugging record.
5. Finally fill in the completion report.
Access Control System Installation III: Pipeline Installation
1. The wiring of the installation project shall comply with the requirements of the State's "Construction and Acceptance Specifications for Electrical Installations" and relevant regulations and regulations issued by the State. The threading in the pipe or in the trunk shall be carried out after the construction plastering and ground works are completed. Prior to threading, the water and debris in the tube or in the conduit should be removed. Lines of different systems, different voltage levels, and different current categories should not be worn in the same tube or in the same slot in the wire duct. There should be no joints or kinks in the pipe or in the raceway. Wire connectors should be soldered in the terminal box or connected by terminals. Small-section system connections can be hinged, the number of twisted turns should be more than five feet, then tinned and taped with insulating tape. Pipes passing through the deformation joints of buildings (including settlement joints, expansion joints, seismic joints, etc.) shall be provided with compensation measures. The two sides of the conductors crossing the deformation joints shall be fixed with appropriate allowances. Terminals in the terminal box should be crimped or soldered with terminal strips. The terminals should have a suitable marking.
2. The access controller should be firmly installed, not tilted, and should have obvious signs. Installed on a lightweight partition wall, reinforcement measures should be taken. The cables or wires of access controllers shall be introduced. The wiring shall be neat and avoid crossover. The parts that should be fixed and fixed to the core wire and the conductors shall be marked with numbers, and shall not fade with the drawings; the terminal board and each terminal shall be connected. Must not exceed two; cable cores and conductors should be left with not less than 20cm margin; the conductors should be bundled into bundles; after the lead-in conductors are threaded, they should be plugged at the inlet conduits.
3. The main power lead-in of the access controller should be directly connected with the power supply. It is forbidden to use the power plug. The main power supply should have obvious signs; the grounding of the access controller is solid and has obvious signs.
4. The route and specifications of the monitoring indoor grounding bus shall meet the design requirements. The following regulations shall be complied with during construction: The surface of the grounding busbar shall be complete, with no obvious damage and residual flux slag. The copper strip busbars shall be light and smooth with no burrs. The insulation layer shall not have the phenomenon of aging cracking; the grounding bus shall be laid on the ground trough or cable The center of the aisle is fixed on the outside of the trough, and the busbars should be flat and must not be skewed or bent. The connection between the busbar and the rack or roof should be firm; the copper strip bus on the cable walkway can be fixed with screws; the copper strand busbar on the cable walkway should be tied to the crosspiece; the system's engineering lightning protection grounding installation should be Strictly follow the design requirements. Grounding installation should be carried out simultaneously with civil construction.
Screw Chiller is called screw chiller because of its key component-compressor. The unit is made of gas refrigerant from the evaporator; after the compressor is adiabatically compressed, it becomes a high temperature and high pressure state. The compressed gas refrigerant is cooled and condensed in the condenser at equal pressure, and after condensing, it changes into a liquid refrigerant, and then expands to a low pressure through a throttle valve to become a gas-liquid mixture. The liquid refrigerant under low temperature and low pressure absorbs the heat of the material to be cooled in the evaporator and becomes gaseous refrigerant again. The gaseous refrigerant re-enters the compressor through the pipeline and starts a new cycle. The principle flow of screw chiller is divided into air cooling and water cooling.
Screw Chiller
Water Cooled Screw Chiller,Screw Water Chiller,Water Cooled Screw Compressor Chiller,screw top water cooler,screw water cooled liquid chiller,water cooled screw chiller trane,Water cooled flooded screw chiller, Screw type water chiller plant‎
Shenzhen Toyocool Refrigeration Equipment Co.,Ltd. , https://www.toyochiller.com