Emerson VILTER VSS Installation, Operation And Service Manual page 166

Appendix B • Vilter Oil
Storage Guidelines For Vilter B and Fl
Type Lubricants
Vilter Type B and FL lubricants are ester-based fluids and
are hygroscopic by nature. This means that they absorb
water moisture from the surrounding environment.
Compared to mineral based lubricants which are typi-
cally saturated with water at less than 100 PPM, ester
based lubricants become saturated with water at ap-
proximately 2,500 PPM.
High water moisture levels cannot be tolerated in the
refrigeration systems where ester based lubricants are
utilized and require specific handling and storage guide-
lines, in addition to the normal precautions for system
dehydration prior to system start-up.
All Vilter lubricants are manufactured to meet strict re-
quirements to ensure minimal water moisture content
as shipped. The following guidelines are provided for the
end-user of the equipment as a means to minimize the
water content of lubricants in storage.
Guidelines
• Use a suitable dehydration process for the complete
refrigeration system to ensure that the system as
a whole is completely dry and water free. This can
be accomplished by the use of vacuum pumps and
checked by a vacuum gauge to ensure that a suitable
micron value has been reached, and maintained.
• Store all lubricant containers in a dry environment.
Do not expose the lubricant to the atmosphere by
opening the container until the compressor sump or
separator is ready to be charged.
Table B-1 Oil Recommendations for Standard Warranty Coverage
Vilter Oil Type
ISO Grade
@ 100°F (cSt)
Viscosity Index
Spec. Gravity
Density lbm/gal, 60°F
Flash Point - °F
Fire Point - °F
Pour Point - °F
Floc Point - °F
Refrigerant Type
B − 2
VSS/VSR/VSM/VSH/VSSH Compressor • Installation, Operation and Service Manual • Emerson • 35391S
Single Screw Compressors Only
717 HCL-68 F-68
68 68 68
77 75.7 65.67
100 132 79
0.867 0.835 0.876
7.4 6.95 7.3
440 525 295
475 570 315
-38.2 -67 -31
-25 NA -75
R-717 R-717 R-22
R-22
R-1270
• Keep the lubricant in its original container. Some
plastic containers allow water moisture to pass
through the container itself.
• If possible, use container sizes appropriate to the
compressor charge to avoid leaving partially filled
containers open for long period of times. Vilter B
Type lubricant is available in 5 and 55 gallon contain-
ers.
• Refrigeration systems using ester based lubricants
will require suitable high capacity moisture filter/
driers to maintain low total moisture content in the
refrigerant and lubricant.
Compatibility & Misc.
• Vilter Type B lubricant has been extensively tested
with many of the components in a refrigeration sys-
tem. Elastomers, driers, etc. for use with HFCs have
demonstrated no adverse effects when tested for
hardness, swelling and brittleness.
• Vilter Type B lubricant cannot be used in conjunc-
tion with a mineral based oils are not miscible with
HFCs. The performance of a refrigeration system is
optimized when the lubricant is allowed to be misci-
ble with the refrigerant to aid in the oil return to the
compressor. If the oil used in an HFC refrigeration
system does not provide oil return capability, the oil
will tend to accumulate in the evaporator reducing
the overall system capacity.
• CFC and HCFC refrigerants should not be used with
Vilter Type B lubricant since these types of refriger-
ants greatly reduce the viscosity of ester based lu-
bricants, resulting in inadequate compressor lubri-
cation.
FL-100
100
76.4
115
0.96
8.26
558
633
Pending
NA
R-22
B-68 HC-68
68 68
71 67.2
108 168
0.957 0.989
7.96 8.25
505 425
560 465
-45 -55
NA NA
R-134a R-290
R-507
R-404A
R-407C
R-410A