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Solenoid valve
Inspect solenoid valves periodically for proper operation. The inspection should include
monitoring the tower pressure gauge on each tower during the cycle. The back pressure on a
regenerating tower should not be greater than 5 psig. Higher pressure indicates either a
malfunctioning valve or a cogged muffler.
Frequent monitoring of the tower pressure gauges in conjunction with the control will give a good
indication of proper operation and can assist with troubleshooting should a problem occur.
Failure of a solenoid valve may result from:
- Faulty control circuit. Check the electrical system to verify that the solenoid coil is receiving
electrical input.
- A burned out coil. Replace the coil.
- Clogged solenoid valve. Disassemble and clean.
- Damaged valve seat. Disassemble and clean.
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Desiccant replacement
Remove contaminated desiccant from each vessel through the desiccant “drain port” located
near the bottom of each vessel. Pour new desiccant into the indicated “fill port” located near the
top of each vessel. Allow adequate space above the desiccant bed to permit bed motion and
expansion during drying. Change the desiccant periodically for optimum dryer performance.
Store any unused desiccant in an airtight container.
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Caution!
Do not operate the dryer with no purge flow. It may damage the dryer and will
void the warranty.
Caution!
Use only activated alumina in your Desiccant Air Dryer.
5. Maintenance
