SMC Networks IDF370D-9-220V Operation Manual - Checks and Inspection
4. Checks and Inspection
4 - 1
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 thermometer for cooled air indicates 2 to 15
o
C during operation with the compressed air
supplied.
• The condensing pressure gauge and the evaporation pressure gauge indicate 1 of the table below
during operation stops with no compressed air applied.
• There is no abnormal sound or vibration.
• There is no abnormal odor or smoke.
Table 1
Cooling water temperature
Approx. 10
o
C Approx.
20
o
C Approx.
30
o
C
Condensation pressure
Evaporation pressure
0.6MPa or more
0.7MPa or more
0.95MPa or more
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 cooling 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) Cooling water
In general, ground water or tap water/ industrial water is assumed to be used as cooling 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) Cooling water quality standard
-
Water quality standard
If water is used as the cooling 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
Checks and inspection
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