Table of Contents
Advertisement
6 - COMMISSIONING
6.1 - Actions required prior to commissioning
To perform commissioning on the air handling unit, it is necessary to check that the electric wiring complies with the diagram and with
best industry practice. The air handling and hydraulic circuits must be compliant and in working order.
Once these actions are complete, it is necessary to complete the "assembly completion notice" document and to return it to your
regional office at least 15 days before the intended system start-up date. No movement can take place until your office has received
this document.
If commissioning should prove impossible due to a failure to comply with the instructions in the assembly completion notice, additional
costs would be incurred at the applicable rate.
6.2 - Test mode
Test mode is a mode used to test the PLC's different outputs individually. In this mode, faults are no longer managed.
If the display is disconnected, the override is maintained and may result in damage to the equipment. This menu can only be accessed
in level 3.
ANY OVERRIDE IS THE USER'S RESPONSIBILITY
NONE OF THE SAFETY DEVICES ARE OPERATIONAL
To access test mode, you first need to set P99 = no, so as to shut down the unit.
Then go to the test menu, and set P3500 (override validated) = yes.
Choose the output to force by setting "on" for the on/off outputs, or by setting the desired percentage for the analogue outputs.
Attention : The last settings made in this menu remain in the memory after exiting test mode. It is strongly recommended to
return all the outputs to "off" or 0% at the end of the tests, to prevent any undesired override when next back in test mode.
To return to normal mode, set P3500 = no, and then P99 = yes.
6.3 - Calibration
The "Calibration" menu is used to correct an offset between a read value and a measured value.
It is possible to add an offset of +/- 5°K to the values read by the temperature sensors, and +/- 200 ppm to the values read by the CO
sensor
The pressure sensors are calibrated by a wizard: in the calibration menu, when the parameter corresponding to the sensor which
requires calibration has switched to "yes" then the measured value is saved and used as the offset. The adjusted value then becomes
0.
To calibrate the pressure sensors, the unit must be stopped and the air flow must be zero. It is also recommended to temporarily
disconnect the connection tubing from the pressure sensor.
2
45
Advertisement
Table of Contents
