Armstrong 11AV Manuale di installazione e funzionamento - Pagina 4
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Troubleshooting
Check operation.
the vent is functioning properly. To check the air vent, disconnect the outlet piping and observe the discharge from
the unit. If the vent is working correctly, a little air should escape, followed by a small amount
of liquid.
When an 11AV, 22AV or 13AV is not operating properly, remove it from service and force water or air through the
discharge fitting. Back-flushing to remove scale and dirt often restores the air vent to its normal operating condition.
When an 11AV, 22AV or 13AV cannot be made to operate properly, replace it with a new one having the same orifice
size.
On new installations, an air vent may fail to open if the maximum operating pressure on the label is less than the
actual pressure being encountered. If this is the case, replace the air/gas vent with one sized properly for your higher
maximum operating pressure. Consult your Armstrong Representative.
An unusual increase in system pressure may cause the air vent to lock shut. Either eliminate the cause of the
increased pressure or replace the air vent with one that can handle the peak pressures.
For assistance with an unsual installation or service problems, contact your Armstrong Representative or Armstrong International's Application
Engineering Department
It is normal on hydronic systems to have no discharge from the vent, but this is not proof that
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