172-65170MA-06 (VAS) 9 Jul 2015
7
Maintenance
Take measures to prevent people from coming into direct contact with
product outlets. Failure to do so may result in burns or other injury from
the discharge of fluids.
CAUTION
Be sure to use only the recommended components when repairing the
product, and NEVER attempt to modify the product in any way. Failure to
observe these precautions may result in damage to the product or burns
or other injury due to malfunction or the discharge of fluids.
CAUTION
Operational Check
A visual inspection of the following items should be done on a daily basis to
determine whether the air vent is operating properly or has failed.
If the air vent should fail, it may cause water leakage or hindrance to water flow.
Normal
: Air is discharged as it accumulates, with the air vent
closing (with no leakage) when no air is present in the
piping.
Blocked
(Discharge Impossible)
: No air is discharged though air accumulates in the air
vent.
NOTE: Once the air vent closes, it will remain closed until internal pressure
drops to near or below atmospheric pressure. This condition may be
confused with a malfunction (blocked). If air is expected to accumulate
in the piping during operation, use together with an automatic air vent.
Leakage
: Water is discharged or leaks through the air vent outlet
during closed position.
Parts Inspection
When parts have been removed, or during periodic inspections, use the following
table to inspect the parts and replace any that are found to be defective.
Procedure
Gaskets: check for warping or scratches
Valve Seat Surface: check for scratches or wear
Float: check for scratches or dents
Float Guide: check for deformation
