Instruction Book
9829 2115 69 98
When the dryer is put into storage for more than one year, then the dewpoint sensor has to
be recalibrated.
Desiccant
• When ordering the desiccant, you will receive the required / ordered quantity either in
bags or in barrels, depending on the quantity and/or type that has been ordered.
• Both these adsorbing materials are used for "drying" the compressed air, but this does not
mean that these can withstand free water. In fact, when these adsorbers come in contact
with water, they will pulverize and turn into dust (which leads to a decreased adsorbing
capacity and the dryer will lose its functionality).
• When storing desiccants of these types, make sure that they are stored in a dry place,
preferably indoors (closed room). Also, keep bags and/or barrels closed until you will use
the desiccant to renew the charge of the dryer or fill them up at commissioning
The storage temperature must be within the limits as stated in Dryer data
chapter.
8 Optional Equipment
8.1 Dewpoint meter
Description
When starting up after a long stand-still period, it is recommended to run the
dryer in a fixed cycle for 1 day.
Immediately after initial start-up of the dryer or after refilling, it is recommended
to isolate the PDP sensor by means of its shut-off valve. This will prevent that
dust from the desiccant filling contaminates the filter and the sensor
Installing a dewpoint meter will increase the accuracy and lower the operation costs. The
dewpoint meter monitors the dewpoint and shows it continuously on the display.
The dewpoint meter controls the dryer operating cycle. As long as the outlet pressure
dewpoint is below the preset value (e.g. -40 "C/-40 °F), the Elektronikon regulator will delay
the dryer shifting and regeneration sequence (maximum 24 hours). See section Operating
cycles.
Compressed air continues to flow through the dryer. When the dewpoint matches the
preset value, the Elektronikon regulator continues, allowing to shift towers.
When activating the PDP control in the Parameters menu (see section Modifying
parameters), it is possible to choose whether the dryer should shift towers according to a
preset time program or according to a preset value. However, the dryer can never shift
towers more frequently than every 250 s, regardless of the control system used.
The sensor must be calibrated once a year. It is recommended to replace the in-line air filter
in the sensor block once a year.
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