Viessmann AWO-M-AC 101.A06, Assembly And Servicing Instructions

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aluminium fins. Do not strike the coil with the water hose. Apply your thumb at the end of the hose to
increase the pressure of the water jet instead of using specific nozzles which could damage the coil.
CAUTION: Do not clean the coil using high-pressure cleaners so as not to apply excessive pressure
which could cause irreparable damage. Damage caused by cleaning with unsuitable chemical
substances or excessively high water pressure will not be recognised under warranty.
CAUTION: The aluminium fins are thin and sharp. Pay the utmost attention and use appropriate
PPE to avoid cuts and abrasions. Cover your eyes and face appropriately to avoid squirting water
and filth while blowing. Wear waterproof shoes or boots and clothing covering your entire body.
For units installed in aggressive atmospheres with a high fouling rate, cleaning of the coil must be
part of the routine maintenance program. In these types of installations, all of the dust and
particulates deposited on the coils must be removed as soon as possible through regular cleaning
according to the methods shown above.
9.2 EXTRAORDINARY MAINTENANCE
All extraordinary maintenance jobs must be carried out by an authorised assistance centre.
9.3 ENVIRONMENTAL PROTECTION
Legislation regulating the use of substances harmful for the ozone layer establishes the prohibition of
releasing refrigerant gases into the environment. In fact at the end of their service life, these must be
retrieved and handed over to specific collection facilities. The R32 refrigerant is mentioned among
substances subject to the special controls set forth by law and therefore must abide by the obligations
indicated above.
Special attention is therefore recommended during maintenance so as to reduce
refrigerant leaks as far as possible.
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DECOMMISSIONING
Once the unit has reached the end of its life cycle and needs to be replaced, the following operations are
recommended:

the refrigerant has to be recovered by trained personnel and sent to proper collection centres;

any antifreeze additives in the water circuit must be recovered and disposed of properly;
 the compressors’ lubricating oil has to be collected and sent to proper collection centres;

the electronic components, such as regulators, driver boards and inverters, must be disassembled and
sent to proper collection centres;

the structure and the different components, if unusable, must be scrapped and divided according to
their nature; there is especially a good amount of copper and aluminium in the machine.
These operations allow easy material recovery and the recycling process, thus reducing the environmental
impact.