Fire alarm host installation method

Fire alarm system installed

1: piping engineering

Technological process:

Prefabrication pipe bending, bracket, hanger - determination of box, box and fixed point position to support frame fixed method, box, box fixed - line installation and connection to seam deformation processing, ground wire

Technical requirements:

(1) when the pipeline laying amount of deviation should be allowed to specification deviation, and pay attention to the pipeline flow, the galvanized layer intact.

(2) the pipeline connection should be threaded connection.

(3) box, box installation should be smooth, neat hole and in conformity with the pipe diameter.

(4) must have the compensation device, through the deformation joints compensation device can move freely; Through the building and equipment foundation and protecting tube. Compensation device level off, smooth tube, to protect the mouth and firm, connected to the pipe and reliable; Add protection casing in concealed work records labeled correctly.

2: wiring project

Technological process:

Wear line to sweep the tube - pay-off and bolt - wire tie with line and to take to protect the mouth, threading to wire connector, connector bandage - line inspection insulation shake test

Technical requirements:

(1) wear belt line not to bend the wire end into the sealing circle, reuse the threader will take line through the ends of the inner pipe lines should be leave allowance of 10 to 15 cm.

(2) the steel pipe before threading, should first check whether each nozzle mouth guard, if there are any missing or damaged, shall be a filling and replacement.

(3) wires for electrical connection, you must first remove the oxide film and then cut off the insulation to connect, and then add welding, wrapped insulation.

(4) wire type, model must meet the design requirements and the provisions of the national standard. Line insulation resistance value is not less than 0.5 M Ω.

3: equipment and all kinds of terminal device installation

Technological process:

System installation requirements - detector and all kinds of terminal device, the installation - > module field devices to the control room equipment installation, system debugging

Technical requirements:

(1) area or total control cabinet should first check before installation plate, whether models are arranged according to the requirements of design drawings. The ark according to fixed pitch, on the basis of channel steel drilling, installation from the beginning, one by one in place, with screws, using the arrows to look straight after all bolts.

(2) join cabinet (plate) within the line of control, all the circuits of the main response to the table, at the same time access protection and insulation have obvious symbol of 220 v power supply cord and the tank (plate) within the battery pack.

(3) the probe installation must be strictly in accordance with the design requirements for installation, must achieve box surrounding the mouth without damage, the wiring is correct, solid and reliable.

(4) terminal box cable neat rows of each circuit, and out of line number, wire tie beam, terminal number corresponding to each other, the handwriting clear.

(5) manual alarm button should be set in the location of the obvious and easy operation, high from the ground 1.5 m, at the same time should be clearly marked.

(6) concentrated alarm system installation, vertical transmission lines should use shaft installation, each layer of shaft should be set at terminal box, terminal at least seven points in the terminal, respectively, as the extension of double line power supply, fault signal lines, signal lines, fire self-checking line, line area, spare 1 and spare two points line. Two alternate is to supply public line for communication.