1. Check whether the voltage of the power supply is normal. The voltage shall be 10% of the taxi on the nameplate.
2.check whether the ambient temperature is normal. (air cooled type below 35 ℃)
3.check whether the fins of condenser and cooler are clean.
4.make sure that the compressed air does not enter the dryer (stop the operation of the air compressor or close the inlet and outlet valves). Open the air bypass valve).
5.check whether the refrigerant pressure on the refrigerant meter is normal (when it is not running, the pressure of R22 refrigerant shall be maintained at about 0.7-1.1mpa, and not less than 0.6MPa in winter).
6.check whether the inlet pressure and temperature of cooling water are normal (water pressure 0.2-0.4mpa, the maximum water temperature shall not exceed 35 ℃).
7. Check whether the air compressor exhaust volume I matches the treatment capacity of the cold dryer.
After operation
8.close the power switch on and the dryer starts to operate.
9.check whether the power supply value of the dryer is normal (please refer to the nameplate).
10.check whether the temperature difference between the cooling water inlet and outlet is normal (5-10 ℃).
11.check whether the fan motor of the cooler operates normally.
12.check whether the fan motor of the condenser operates normally (the motor is controlled by the pressure switch, and it starts when the pressure is 1.55Mpa, and stops when the pressure is 1.35mpa).
13.after 10 minutes of operation, let the compressed air enter the dryer to start the air compressor or slowly open the inlet and outlet valves to close the air bypass valve.
14.check for air leakage.
15.check whether the inlet compressed air temperature is normal. High temperature type continued 80 ℃, low temperature type cluster 40 ℃.
16.check whether the compressed air pressure in the day is normal. (standard 0.7MPa, please refer to nameplate).
17.check whether the temperature difference at the inlet and outlet of the dryer is normal (the temperature difference value is 10 ~ 30 ℃).
18.check whether the high and low pressure of refrigerant is normal (under no-load condition, the high pressure of refrigerant R22 is 1.35-1.55mpa, and the low pressure is 0.32-0.4mpa).
19.If the high pressure of the water-cooled model is abnormal, the water volume regulating valve at the inlet of the cooling water can be adjusted (clockwise, pressure decreases, counterclockwise, pressure increases).
20.after 30 minutes of operation, check whether the drainage system is normal (generally, the drainer will automatically drain water).
21.if the evaporator is frozen and the compressed air cannot pass, adjust the temperature controller to the scale of 0 ℃ - 3 ℃ (the red number is 0 ° C, the green number is 0 ° C).
Regular maintenance
1.Check whether the fins of the condenser and cooler are clean every day, so as to avoid the adverse effect of heat dissipation on the water removal effect and service life of the dryer.
2. The hot fins used for cleaning the condenser and cooler can be sprayed with compressed air. If they are seriously blocked, they can be cleaned with cleaning agent, but the solvent that will corrode the copper tube and fins shall not be used.
3.keep the dryer in good ventilation at all times.
4.pay attention to whether the inlet temperature of the dryer exceeds the rated temperature at any time.
5.check whether the high and low pressure of the refrigerant is normal every day. After 4 hours of shutdown, the pressure is 0.7-1.1mpa, the no-load startup low pressure is 0.32-0.4mpa, and the high pressure is 1.35-1.55mpa (this pressure is R22 refrigerant).
6. Check whether the cooling water condition is normal every day, the water pressure is 0.2-0.4mpa, and the inlet water temperature is ≤ 35 ℃.
7. For water-cooled models, clean the water filter every three months or when the refrigerant high pressure is higher than 0.17mpa. If the refrigerant pressure is not normal, wash the condenser and pre cooler.
8.clean the filter screen inside the ball valve of the drain every two weeks to keep the drainage smooth.
9.If you need to have a comprehensive maintenance, please contact us.
If all the above inspection items are normal, it is normal operation.
Note: 1. Long term operation without load shall be avoided, and the no-load operation time shall not exceed 30 minutes.
2. Wait for 5 minutes after shutdown to restart the machine to avoid frequent startup and shutdown, resulting in compressor damage.
Electronic drain
Set timer
Set the interval time with the right knob
Set the discharge time with the left knob
Set the time as follows:
Set the discharge time to 4 seconds and the interval time to 5 minutes, and then make further adjustment as required.
Maintenance
We suggest that you also press the manual test button of timer to check the electronic drainer every time you check the compressed air system.
Clean the filter socket ③ once a month to minimize the occurrence of poor operation of the electronic drain valve. In case of blockage, it must be disassembled and cleaned if it is not closed in time. But before cleaning, close the front ball valve to make sure there is no air pressure and turn off the power.
Please close the switch ①, press the manual button to relieve the pressure, screw out the nut ②, and take the filter screen ③ for cleaning.
