Pfannenberg DTT 6101 Serie Manuel D'utilisation page 137

ENG
6.2 General
The refrigeration circuit is a maintenance-free, hermetically sealed system.
The units are 100%-tested at the factory.
Manufacturer recommendation to the owner for maintenance work:
• Perform maintenance work regularly every 12 months according to the maintenance checklist, see section "Maintenance
schedule", Page 60.
– Shorter maintenance intervals are required for air/water heat exchangers that cool in ambient air containing oil
and dust. A shorter guide value of two to six months applies between the maintenance intervals.
• The functions of the Pfannenberg filters are optimally adapted to the cooling units. Therefore, the use of Pfannenberg
filters has positive effects on the scope of the maintenance work.
Operating Manual | Roof-mounted Cooling Unit | Multi Controller (MC) – 230 V | 086100023c 59/78