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5.1.3
Start-up Procedures
During the first start-up or start-up after a long period of inactivity or following maintenance, the
technician must comply with the instructions below. The start-up must be performed by qualified
personnel only.
The employee that operates the machine must wear hearing and eye protection before operating the
dryer. 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.
Start-up Sequence
Please read and understand the entire manual before operating the dryer
Verify the factory settings
Verify the wiring diagrams that pertain to your unit and ensure the correct power supply is connected
Do not energize the circuit at this time
Verify that proper short circuit protection has been provided following all applicable codes and regulations
Verify all steps of the previous chapters relating to installation have been observed
Verify that the connection to the compressed air system is correct
Verify that the condensate drain pipe is properly fastened and connected to a collection system or container
Remove any packaging and other material that might obstruct the area around the dryer
Before starting the dryer your compressor should be running, your compressed air system pressurized and the dryer
bypassed and not yet pressurized.
1. Begin with the dryer bypassed and in isolation (see Section 4.2 & Section 4.4)
2. Ensure that purge exhaust valves are in closed position; this may have to be performed manually as
the result of there being no air in the system in order to drive the pilot air into the valves.
3. SLOWLY open the inlet isolation valve allowing compressed air into the dryer. It is critical that the
dryer be pressurized slowly to prevent fluidization of the desiccant bed. Keep the outlet isolation
valve closed at this time.
4. SLOWLY open the outlet isolation valve. All bypass and isolation valves are now in their open
positions and compressed air is flowing through both Vessels.
5. Close the dryer bypass valve. The bypass valve must be bubble tight to prevent any moisture from
contaminating the dry air outlet from the dryer.
6. Plug in the dryer and energize the electrical circuit – the dryer is now ON.
7. Verify that the controller is on.
8. Check all piping for compressed air leaks.
9. Test the condensate drain on the pre-filter.
10. After 1-minute from start-up the adsorption Vessel B will be depressurized.
11. The pressure swing cycle occurs every 4 hours (outlet dew point of -40°F).
NOTE: During the first few cycles in operation, the dew point cannot be guaranteed because the adsorption material
can contain humidity from storage.
DRYPOINT XFi 1000 manual_revA EN
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