Automatic fire protection design 14et. railway.

Key Solutions

This project is based on the Ventilation section.

The control system provides:

- maintaining the supply air temperature in the supply air ducts of the systems in the "heating" mode in the cold season, by adjusting the coolant flow rate with a 3-way valve with a drive according to the signal from the supply air temperature sensor;

- automatic correction of the setpoint for the return coolant, depending on the outside air temperature;

- disconnection of units in case of fire;

- control of system parameters in automatic (controller Loop) and remote modes (using a special dispatching system);

- indication of operation and emergency states of units (dispatching system);

- calorifer freezing protection by contact temperature relays (thermostat).

Ventilation parameters are controlled using automatic control system (ACS). ACS includes: sensitive elements (sensors), signal processing system (controllers), actuators (electric valve drives, electric motors), switching and start-up equipment. This system is based on MZTA LOOP microcontrollers. A separate automation panel is manufactured for each plenum installation. This ECS consists of a set of control boards. These boards are installed in the ventilation chambers (see sheet 8).

The shields should be installed according to the layouts at a height of 1.5 meters from the floor .

The automation system of a separate plenum installation operates from 4 temperature sensors located on the street, in the air duct, in the pipeline of direct and return water of the heater. Air dampers are opened synchronously. All fans are started synchronously, with a time delay relative to the opening of the air dampers.

For the purposes of fire safety, the system provides refractory valves, smoke removal valves. The system also designed roof fans for smoke removal shafts and fans for pressurizing air into the shafts of elevators, air locks in front of the stairs. They are connected and controlled from the fire alarm controller (see OPS section).

When fire detectors are activated, the OPS controller outputs a signal to all controllers of the ventilation system for forced shutdown.

Electrical power connection task: connect automation boards according to one-line diagram of boards.

Connect the equipment according to the attached instructions to the instruments.

Dispatching is provided for the ventilation system. To do this, a personal computer is installed in building 1E, a low-current network with an Ethernet interface is laid between buildings. Network separators are installed in key houses: routers (buildings 1D, 2K, 1E, 2B). The control room of this building summarizes data on systems in houses: 1A, 1B, 1D, 1E, 2K, 2B, 2I. Route the cable on the plans (see sheet 810).

In case of hidden gasket with combustion structures, wiring shall be performed in metal pipes. The places where cables pass through the walls must be made in a metal pipe, conduit, with an easily removable mass with a fire resistance degree of not less than the fire resistance limit of the main structures (walls, floors).

To protect against electric shock, all metal parts of electrical equipment that are not normally energized shall be grounded. Protective grounding in electrical installations shall comply with the requirements of PUE, ch. 1.7 and SNiP 3.05.0685.

In accordance with the "Law on Certification of the Russian Federation," all products, materials and equipment used in the project have the necessary quality certificates.

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