Honeywell F-BO-AFE70 Series Installation, Connection, Commissioning, Maintenance

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Honeywell F-BO-AFE70 Series Installation, Connection, Commissioning, Maintenance Manual pdf 29 page image

User Manual Series F-BO-AFE70 Chapter 8 • Mounting and connection of pneumatic components8.3 Connection of the compressed airThe Automatic Purging Unit F-BO-AFE70 is provided with a commercial push-in fitting for easilyconnecting the compressed air via a hose with an outer diameter of 10mm.The push-in fitting of the Automatic Purging Unit F-BO-AFE70 may only be connected and dis-connected by applying a counteracting force on the pipe elbow on the input of the valve in orderto avoid excessive strain. Connection and disconnection without applying an adequate counter-acting force can cause damage to the solenoid valve, the cover of the Purging unit and the push-in fitting.It is recommended that a shut-off device for the compressed air should be installed before thecompressed-air connection of the Purging unit; this makes installation, commissioning and anymaintenance jobs easier.Only turn on the compressed-air supply after finishing all mounting, installation, connec-tion and parameterisation work in the course of commissioning, as described starting onpage 40 in Chapter 10: „Commissioning and function test“. Turning on the compressed-airsupply at an earlier time can result in severe damage or injuries, depending on the condi-tion of the system and the environment.The compressed-air supply must be engineered in such a way that the maximum permiss-ible input overpressure of the Purging unit will not be exceeded, see from page 43 onwardsin Chapter 12: „Specifications“.If the used compressed-air supply can exceed the permissible pressure, a pressure regulator must beused. This pressure regulator must be constructed in such a way that it does not limit the air flowrate in an inadmissible way. The maximum permissible positive operating pressure as well as therecommended air flow rate for the Purging unit that you are using can be found from page 43onwards in Chapter 12: „Specifications“.Furthermore, the compressed-air supply must be engineered such that the compressor and the com-pressed-air vessel as well as the supply line up to the Purging unit are sufficiently dimensioned, sothat during the Purging process the pressure that is available at the input of the Purging unit doesnot decrease to an insufficient value, in which case the required air flow rate would no longer beensured for the duration of the Purging process.The compressed air must always be clean and free from oil and water or other contamination. Ifcompressed air is used which is not sufficiently purified, these contaminations can result in mal-functions of the Purging unit or of the aspirating smoke detector. For example, the valve pistonsystem of the Purging unit can ice up or the measuring device of the aspirating smoke detectorcan become oily, and therefore can become useless or can even be destroyed. This can also leadto false alarms or increased contamination of the aspirating smoke detector as a result of particlesin the compressed air, which are again drawn in by the evaluation unit of the aspirating smokedetector after a Purging process.I56-4252-010D200-104-0029