Installation and wiring of desicant air dryer (heatless type)

Tuesday - 30/07/2019 03:13

Installation and wiring.

  • Receiving & inspection.

  1. Carefully inspect the packing and dryer for external and internal damage. If you suspect damage has occurred during shipment, notify the transportation agency at once. This is the customer’s responsibility.

  2. Check the nameplate for correct power supply requirement.

  3. Inspect all piping and tubing. Vibration during shipment may have loosened the connections .

  4. Desiccant air dryers are tested and operated before leaving the factory. They are ready to operate after connecting to proper servives.

  • Location.

  Locate your Desiccant Air Dryer on a level floor free from vibration  and    in clean surroundings. Although the dryer is a free standing package , it ,may be secured by bolting the dryer base to the floor. Allow approximately three feet on each side of the dryer for ease of connecting and maintaining the dryer. The ambient temperature in the dryer’s location should range from 2ºC to 40 ºC. The dryer will function in warmer ambient, but as a result, the degree of dew point suppression will decrease. Operation of the dryer in ambient approaching freezing could cause freezing of separated liquids in the pre-filter sumps or in the dryer itself. For dryer operation at temperature below freezing, pioneer recommends heat tracing the pre-filter sump, drain trap and inlet manifold. For more information on heating tracing, contact your distributor or the factory. Protective bariers are recommended for the prevention of accidental damage that may occur due to vehicular or personel trafic, particularly for dryers located in open area.
Connect inlet piping, including a shut off valve:

  1. Connect outlet piping, including a shut off valve.

  2. Install pre-filter and after if not factory installed.

  3. If desired, install bypass piping using bubble tight valves. Bypass piping is recommended for ease of maintenace, troubleshooting and services.

  • Filtration.

All regenerative desiccant dryers are designed to remove water in the vapor phase. The possibility of liquid carry over to the desciccant dryer must be avoided. A coalescing pre-filter will eliminate the carry over of droplets and aerosol-sized mists of both liquid water and compressor lubricant. The use of a coalescing filter will enhance the dew point depression capacity of the dryer. It will also extend the life of the desiccant by preventing compressor lubricant fouling of the desiccant bed. After filtration is also a very important step. All regenerative desiccant dryers gradually procedure hard abrasive desiccant fines. These contaminations should be removed with a particulate filter. The elimination if desiccant fine carry over will protect your plant air systems and reduce future system malfuntions.
When installing filters, make connections according to the arrow directions marked on the filter head.  

  • Back pressure regulator.

In dryer applications where sudden down-stream demand for dry air frequently occurs, a rapid pressure loss in the compressed air system is possible. To prevent this, it is recommended that a back pressure regulator be installed down-stream from the dryer.
The back pressure regulator will maintain a constant pressure within the dryer. This will eliminate any chance of saturating the desiccant bed by sudden flow surges which accompany rapid pressure loss. By eliminating saturation and desiccant bed “ bumping” the life the desiccant charge will increase, and the after filter element will nit become prematurely clogged with desiccant finer.
To eliminate noise created by frequent tower release of purge exhaust, the dryer’s exhaust may be piped to an outside or more remote location. This will also eliminate any possible problems caused by indoor accumulation of condensed moisture from the purge exhaust. Iff extending the exhaust pipe, install it horizontal or downward to avoid accumulation of condensate at low points. If the purge exhaust pipe farther than 5 meter, consult the factory for recommendations.


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