Instruction & Technical Manual | 21
8.2.4 Connecting the PC to the controller
See 8.1 for connection of the PC to the controller. The
energy management active box will be ticked and a default
delay of 15 seconds operational. If this figure is considered
suitable for the application, no further set up is necessary.
If the application requires dedicated settings to be entered,
follow the rest of the instructions in this section.
The energy management feature can be deactivated by
unticking the box if necessary. Alternatively, the DIN plug
with jumper link will override the energy management
feature providing it is left in place.
Select dry or wet receiver from the illustration given in the
set-up screen by toggling in the appropriate box.
Note: for point of use dryers or constant running dryers
utilizing dewpoint monitoring the dry receiver system
should be activated regardless of installation.
By switching “dryer receiver” this will operate the energy management facility after a 15
seconds delay.
For wet receiver applications switch the wet receiver box. To calculate the necessary delay it is
necessary for the installer to input the high and low pressure set points for the compressor
switch, the internal volume of the receiver and the flow rate of the dryer. The purpose of the
delay is to prevent dryer saturation when using a large receiver with large range of set
pressures.
Once the application conditions have been input click “OK” this will return the screen to
main application software click “Program CD” will set and fix the previously defined
conditions.
The RS232 connection can be removed by using a small screw driver to depress the retaining
tang on the connector and withdrawn. Replace the push-in cover and replace the front
panel.
8.2.5 Energy management memory retention
Energy savings are made in the dryer by interrupting the normal purge operation during
periods of low demand.
To maintain the equilibrium of the dryer towers the dryer has a memory retention
feature. This allows the dryer to remember the point in the operating cycle when the
energy management feature was activated and return to it to complete the cycle.
8.2.6 From new or service delay
To allow conditioning of the dryer desiccant beds to the optimum condition, a 6-hour
delay has been programmed into the controller to delay Energy Management operation
from new or from a service. Once this time has elapsed and the energy management
facility can then be operated.
