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10.4.4 Oil draining, oil filling, oil change
10.4.4.1 Importance of oil change
Aged oil demonstrates a loss of lubricity. Because of this, all rotating components
of the compressor are endangered. The oil filter elements become prematurely
clogged and must be cleaned and replaced at shorter intervals.
The oil in the product requires changing
• if the operating time of the oil fill has reached the technically specified oil
change interval.
Warning!
Observing the intervals for oil analysis and oil change!
► Oil analysis when using ammonia as the refrigerant after 5000 operating
hours or at the latest after 1 year.
• if the oil becomes unacceptably contaminated due to a major accident (e.g.
water penetration into the refrigerant circuit).
The degree to which oil in the products has aged must be checked by anal-
ysis and comparison of the data with those of fresh oil.
Oil ageing can also be judged from the darkening of the oil colour and the depos-
its found in the oil filters. If the degree of ageing cannot be assessed reliably by
laboratory analysis and the results of visual examination, it is advisable to change
the oil at the following intervals (see maintenance instructions).
The assessment of the condition of the refrigerator oil by means of a general vis-
ual inspection (contamination) or laboratory analysis must be carried out:
• after 5000 operating hours
or
•
at the end of one year's operation
or
• after remedying major damage
or
• in case of extreme darkening of the oil colour or opacity of the oil.
10.4.4.2 Oil change, maintenance work
Take oil samples for analysis and comparison with the fresh oil data at regular
intervals. Check the colouration of the oil visually and assess the degree of con-
tamination.
Depending on the results, the user must decide whether to approve the post-
ponement of filling the oil until the next assessment date or whether to have the
oil changed.
Oil with impermissibly high water content must be removed from the product
immediately.
10.4.4.3 Changing the oil, implementation
(See also installation and maintenance instructions for compressor)
Maintenance
Maintenance work
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96 19.12.2019