iDRY Series Heatless Regenerated Dryers: IOM10003-C (Rev. A) 14
5.3 General Operation
The dryer may require up to 48-hours of operation to reach normal operating outlet dew point. Therefore,
indicators and alarms do not need to be recognized during this time. Applications where a dew point lower than
-40 °F is needed, may require additional time to reach equilibrium.
The dryer will not perform without properly sized and installed pre-filtration, condensate drainage and correct
purge flow adjustment.
After the initial start-up some dusting may occur. This is normal and will diminish with time, although may
accelerate the first maintenance interval of the exhaust valves, exhaust silencers and post-filter element.
Exhaust valves and silencers may have to be cleaned due to dusting from shipping and the initial start-up, and
should be cleaned regularly to ensure proper operation. Post-filter elements should also be part of a regular
preventative maintenance schedule.
Never service the dryer or filters without first relieving pressure from the dryer.
A desiccant dryer should never be pressurized or depressurized suddenly. This will cause degradation and
dusting of the desiccant bed.
The dryer is designed for a maximum operating pressure of 150 psig as standard.
6. ISOLATION AND SHUT DOWN PROCEDURES
Users operating the machine must wear hearing and eye protection. Each employee must select a proper
personal protection device (PPD) hearing protector such as earmuffs, ear canal caps or earplugs in order to
prevent permanent hearing damage or loss.
1. Allow the dryer to reach its re-pressurization step and fully re-pressurize.
2. Once fully re-pressurized, remove power from the dryer.
3. Open the bypass valve.
4. Close the outlet isolation valve.
5. Close the inlet isolation valve.
Depressurization and Shut Down
1. Open the bypass valve.
2. Close the outlet isolation valve.
3. Close the inlet isolation valve.
4. Allow the dryer to continue to run. During the normal operating cycle both towers will blow down and
depressurize.
5. Disconnect the power to the dryer.
6. Open the manual ball valves on any filters with manual ball valves to allow full depressurization. Also,
leave manual ball valves on filter open during maintenance and service.
IMPORTANT! Always remove all pressure and disconnect all power before servicing the dryer.
To restart the dryer, follow the start-up procedure in Section 5. START-UP
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