Preventive Maintenance - Swegon GLOBAL PX Operation And Maintenance Instructions

7.0 Preventive maintenance

Attention : before handling and/or opening the access panels it is compulsory to shut down the unit and
disconnect the power supply using the general switch located on the front panel.
Do not isolate the power supply whilst the unit is running. If KWin and\or KWout are installed, then isolate the
corresponding power supplies.
Regular maintenance is essential to guarantee good operation of the air handling unit and a long service life. The
maintenance frequency will depend on the application and on the actual environment conditions but the following are
general guidelines:
7.1 ONCE THE UNIT OPERATES IN NORMAL CONDITION
Replace the filters with a kit of replacement filters.
7.2 EVERY 3 MONTHS
- Check for any alarms indicated on the control device. In case of an alarm refer to troubleshooting section.
- Check the state of filter clogging. The control device allows a pre-defined 'filter alarm' threshold to be set.
Replace filters if necessary. Filters that are too clogged can generate the following problems:
- Insufficient ventilation.
- Excessive increase of fan rotation speed.
- Excessive sound levels.
- Excessive power consumption (power consumption will increase exponentially to an increase
in pressure drop, for a constant airflow).
- Unfiltered air passing through the heat exchanger (risk of clogging) and into ventilated rooms.
The list of replacement filter kits for each unit can be downloaded from our website.
- To locate the filter, refer to schemas on page 9 to 14.
- Inspection and cleaning of the inside of the unit:
• Vacuum clean any accumulations of dust in the unit.
• Inspect and gently vacuum clean the heat exchanger if necessary. Use a brush to protect the fins.
• Clean any condensation stains.
• For PX units, clean any accumulations in the drain pan.
Operation and maintenance instructions
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