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IDX-OM-M051
Air Dryer
4. Checks and Inspection
4 - 1
IDF100F~150F-W
4.1 Daily check
Check the following items daily. Immediately stop the operation in the event of failure, and refer to “Chapter
5 Troubleshooting” to solve it.
•
There is no compressed air leakage.
•
The START lamp lights up during operation.
•
Condensate comes out of the drain tube during operation.
•
The evaporation thermometer is in the green area during operation with the compressed air
supplied.
•
The evaporation thermometer indicates a temperature approx. 3 to 10
o
C lower than the ambient
temperature when operation is stopped and no compressed air supplied.
•
There is no abnormal sound or vibration.
•
There is no abnormal odor or smoke.
•
The running time accumulator display is not flashing or off.
4.2 Parts requiring regular maintenance
4.2.1 Maintenance of the water-cooled condenser
If a water-cooled air dryer is used temporarily, dirt will accumulate on the facility water side of the
water-cooled condenser.
Then, the condensation capacity will decrease and the condensation pressure will become extremely high,
causing the protective equipment of the air dryer to operate. If the air dryer is operated, read the cautions
below carefully and conduct maintenance of the condenser.
(1) Facility water
In general, ground water or tap water/ industrial water is assumed to be used as facility water for the
water-cooled condenser. Also, the methods are divided into two categories, transient type and circulating
type.
In the transient method, the ground water or tap water/ industrial water is continuously supplied to the
water-cooled condenser, and the water whose temperature has risen is discharged outside. This method is
used in locations where there is a plentiful supply of water.
In the circulating method, heat is absorbed by the water-cooled condenser, and the water whose
temperature has risen is cooled down using a cooling tower or a chiller to recycle it.
A decrease in performance of the water-cooled condenser is mostly attributed to corrosion of the facility
water or adhesion of scale etc.
(2) Facility water quality standard
-
Water quality standard
If water is used as the facility water, please refer to JRA-GL-02-1994 [water quality guidelines for
refrigeration and air-conditioning equipment] prepared by Japan Refrigeration and Air Conditioning Industry
Association as a reference for the water quality level to prevent excessive corrosion and scale-related
problems. The values are shown in Table 2 on the next page.
Checks and inspection
4
4.1 Daily check