35
IOM D-020 ARISENSE
5. OPERATION
When the system is charged and the pipeline begins to fill, the water flowing in the pipeline enters into the combination
air valve, raising the air/ vacuum and air release floats to their sealing position.
During filling, air is discharged mainly through the air/ vacuum orifice as well as small amounts of air released through
the air release orifice. As the pipeline becomes fully pressurized, the air/ vacuum orifice will seal and entrapped air will
then be automatically released only from the air release orifice.
During pipe draining or water column separation, the floats will drop down due to the vacuum created, and air will
enter into the pipeline through the air/ vacuum orifice.
6. TROUBLESHOOTING
Symptom
Possible Causes
Remedy
Discharge Elbow and/or
Extension broken
Part was mishandled or hit
Gently remove the part with a flat screwdriver and
replace
Leakage from the
Discharge Elbow
A. Low pressure
B. Debris caught in the Rolling
Seal Assy. or Rolling Seal torn
or cracked
A. Requires a minimum pressure of 0.05 bar (0.7 psi)
to seal properly
B. Follow instructions replacing Rolling
Seal Assy.
Leakage from the Ball
Valve
A. Ball Valve not completely
closed
B. Debris caught inside the
Ball Valve
Open, then fully close the Ball Valve