Record instrument readings four times per shift:
1. The differential pressure between the compressed air inlet and outlet must not exceed 0.035 MPa;
2. Evaporation pressure gauge reading: 0.4 MPa – 0.5 MPa;
3. High-pressure gauge reading: 1.2 MPa – 1.6 MPa.
Regularly monitor the drainage and blow-down systems:
1. Clean the float-type drain trap approximately once a week.
2. Blow down the drain pipe once a week. Cleaning procedure for the electronic drain trap:
a. Close the ball valve located upstream of the automatic drain trap;
b. Loosen the upper retaining nut and remove the timer coil. *Note: During the cleaning process, the coil must never come into contact with water; otherwise, it will burn out*;
c. Disconnect the hose, unscrew the drain valve body, and vent the compressed air remaining inside the drain trap;
d. Remove the valve core and wipe it clean;
e. Screw the valve body back into its original position. Slightly open the upstream ball valve to use compressed air to purge impurities, water, and oil from the drainage system; then, wipe the valve body clean with a cloth;
f. Reinstall the valve spool and timing coil in their original positions; then reattach the hose and open the upstream ball valve.
Regularly monitor the inlet temperatures of the cooling water system and compressed air system.
1. Cooling water temperature: 2–32°C.
2. Water pressure: 0.15–0.3 MPa.
3. Compressed air inlet temperature should generally be ≤45°C (ideally, the inlet pipe should not feel hot to the touch); exceptions apply in special cases.
4. The cooling water must be kept clean. Clean the Y-strainer every two weeks (or once a month if water quality is excellent). Clean the water-cooled condenser annually (the specific frequency depends on water quality). Clean the air-cooled condenser monthly.
5. When cleaning the air-cooled condenser, take care to avoid damaging or flattening the condenser fins.
Ensure there is sufficient clearance around the air-cooled condenser to allow for proper ventilation and heat dissipation; the unit must not be operated under direct sunlight. Periodically use compressed air to remove accumulated surface dust; ensure the airflow and pressure used for cleaning are not excessive.
6. Cleaning the shell-and-tube water-cooled condenser: Close the cooling water inlet and outlet valves, then remove the end caps on the side not connected to the water piping. The exterior of the end caps and the gaskets need only be washed with water. The interior of the copper tubes should be cleaned using compressed air, water, or a cleaning rod fitted with a cloth. Exercise caution during cleaning to avoid applying excessive force, which could rupture the internal copper tubes.
Regularly monitor the refrigeration system.
1. Touch the compressor by hand at least once daily; under normal operation, it should feel cool or show signs of frost.
2. Once a week, check the temperature difference across the dryer filter using your hand; the temperature difference between the inlet and outlet should not be significant (if the inlet feels hot while the outlet feels cool, the filter requires replacement).
3. If any abnormal noises or signs of overheating are detected in the compressor, contact After-Sales Service immediately.
Inspect the electrical control system: Blow away accumulated dust and tighten all wiring terminals (this procedure *must* be performed with the power supply disconnected).
Exterior Maintenance.
Periodically use a clean cloth to wipe away oil stains and dust from the equipment's exterior surfaces. Clean the floor area surrounding the refrigerated air dryer and air compressor to remove dust and oil stains, thereby maintaining a clean and tidy environment.