Instruction Manual SMC 186-188/TSMC 188

We would, therefore, advise that the oil analyses
be carried out at the intervals prescribed.
An oil sample must be drawn off while the
compressor is in operation, which gives a
representative sample. Before taking the
sample, clean the drain valve and tap a little
oil off, to prevent any impurities which may
have accumulated in the valve or the piping
from mixing with the sample.
As a special offer to our customers
SABROE has developed an analytical concept,
which is able to analyse all oil makes.
This will mean a uniform reporting of the results.
The analysis allows the following to be determined:
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Whether or not the oil is still usable, if necessary
after filtering.
Visual assessment
If you pour the sample into a clean, transparent
glass bottle or a test-tube and hold it up
to a clear light source, it will be easy to assess
the quality. You can also compare the
sample with the fresh oil of the same make
and grade.
An oil which you approve on the grounds of a
visual assessment must:
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be clear and shiny
not contain any visible particles
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Whether solid particles possibly present in
the oil originate from the bearings or other
components exposed to wear and tear in
which case the compressor must be inspected.
Each report will include the corresponding
measuring results from theprevious3oil
analyses. In this way you will be able to
follow up on the state of both the oil and
the compressor from one analysis to the
next.
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feel viscous, smooth and greasy when a
drop is rubbed between two fingers.
If you don’t feel that you can approve the oil
by visual assessment, charge with new oil or
send a sample to a laboratory for analysis.
Warning
If the oil sample is poured into a glass bottle,
this must not be hermetically sealed until all
the refrigerant in the oil sample has evaporated.
Refrigerant in the oil may produce excess
pressure in the bottle with subsequent
risks of explosion. Never fill a bottle up completely.
Do not send glass bottles through
the postal service -- use purpose-made plastic
bottles. Please see below.
Procedure
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A form set with a plastic sampling bottle
and a dispatching envelope can be requested
from the local Sabroe Refrigeration
representation.
The oil sample must be drained from the
cleaned oil drain valve into the sample
bottle. Screw the lid loosely on and let the
bottle stand for a few hours to enable refrigerant
contained in the oil sample to
evaporate before sending it to the laboratory.
Analytical evaluation
Naturally, the oil sample can be analysed by
the oil company which supplies the oil.
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Please follow the Sampling and Shipping
Instructions enclosed in the form set in
which the addresses of the laboratory in
Holland are also mentioned.
0178-900-EN 41