Flammable gas alarm wiring specification, gas detector installation specification and wiring specification

Summarize and summarize the flammable gas detector installation specification and wiring specification requirements:

1 The combustible gas detection probe selection point should be within the range of 1 meter in the vicinity of the valve, pipe interface, outlet port or leaky location, as close as possible, but do not affect the operation of other equipment, while avoiding high temperature and high humidity environment.

2 combustible gas detection probe can be used for a large area of ​​gas detection can be a probe arrangement of 10 to 12 square meters (or 3-5 meters radius of the circle), but also to achieve the detection alarm effect.

3 The installation method of flammable gas detection probes can be used for roof lifting, wall mounting or bobbin installation. It should be ensured that the installation is firm and reliable, and consideration should be given to easy maintenance and calibration.

4 Installation height of flammable gas detection probe: When detecting gas with a specific gravity smaller than air such as hydrogen, natural gas, and city gas, it shall be installed approximately 1 meter away from the roof; when measuring gas with a specific gravity greater than that of air such as liquefied petroleum gas, it shall be 1.5-2 meters away from the ground. Mount it to the right (or 30 cm from the floor).

5 The flammable gas detection probe wiring should adopt three-core shielded cable. The single wire diameter is more than 1mm2. The shielding layer must be grounded when wiring.

6 Combustible gas detection probes shall be piped in the field. The pipes used shall meet the requirements of fire protection. The pipes shall be connected with the probes to meet the explosion-proof requirements.

7 The flammable gas detection probe should be mounted with the sensor facing down.

8 Combustible gas detection probes shall be connected under power-off conditions to confirm that the wiring is correct and energized; open the lid and debug the probe under the condition that no leakage of flammable gas is found on site.

9 Combustible gas detection probes should be calibrated at least once a year to ensure detection accuracy.

The cable specification when installing is: RVV3×1.0mm2 or RVVP3×1.0mm2

In order to meet the explosion-proof requirements, please add the explosion-proof junction box between the explosion-proof pipe connections during installation.