Table of Contents
Advertisement
sample the lubricating oil shortly after a unit has been placed back into operation after it
has been opened for service, as recommended from previous sample results or after a
failure. The presence of residual materials from a failure should be taken into
consideration in subsequent analysis. While the unit is in operation, the sample should
be taken from a stream of refrigerant oil, not in a low spot / quiet area.
Table 15, Upper Limit For Wear Metals And Moisture In Polyolester Oils In
Aluminum
Copper
Iron
Moisture
Silica
Total Acid Number (TAN)
Key To Action
D-EIMWC00804-14EN
Daikin Centrifugal Chillers
Elements
1.
Re-sample after 500 hours of unit operation. If content increases less than 10%,
change oil and filter and re-sample at normal interval. If content increases 25%
or more, inspect compressor.
2.
Re-sample after 500 hours of unit operation. If content increases less than 10%,
change filter drier and re-sample at normal interval. If content increases 25% or
more, monitor for water leak. Since POE lubricants are hygroscopic, many times
the high moisture level is due to inadequate handling and packaging. The
reading
MUST BE USED
3.
For TAN between .10 and .19, re-sample after 1000 hours of unit operation. If
TAN increases above .19, change oil, oil filter and filter drier and re-sample at
normal interval.
Centrifugal Chillers
Upper Limit (ppm)
50
100
100
150
50
.19
in conjunction with moisture readings
Action
1
1
1
2 &3
1
3
TAN
55
Advertisement
Table of Contents
