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AdaptaPAK® Installation
temperatures and pressures. Liquid refrigerant and oil are said to be completely miscible—that is, that they can be
mixed in any proportions. When mixed, they exist in a single phase. The extent to which they are miscible depends on
the type of oil and refrigerant that are mixing together.
The most commonly used lubricants in refrigeration systems are based on three different types of oils:
•
Polyol Ester Oil (POE)
•
Mineral Oil (MO)
•
Alkyl Benzene Oil (AB)
The particular type of oil a refrigeration system uses is determined largely by the refrigerant it uses. A table showing
which oil works (is compatible) with which refrigerant is provided in the table that appears below.
It is important to use only the grade and type of oil that is specified by the manufactureer. Refrigerant and oil must
only be handled by qualified personnel.
Pipe Supports and Fittings
Pipe supports and fittings are also referred to as mechanical fasteners. The material used for these purposes, of
course, must be of sufficient strength to support the weight of the pipe.
Unistrut, a particular type of pipe support, is widely used for refrigeration piping. Angled steel, pipe clamps with
plastic or rubber compound liner material that is held in place by an outer steel layer, along with wires and bands are
also commonly used. These latter items are typically used in place of Unistrut. Bands used for pipe supports tend to
be made of either metal or fi ber. Fiber material, such as nylon, is preferred since it is unlikely to rip or tear insulation
which can happen with metal. Painted or galvanized steel, however, generally works better than other types of
unfinished metal. Plastic can also be used as long as it meets the criteria mentioned above, that it is strong enough
to adequately support the weight of the pipe. In fact, even (nylon) cable ties are used in some cases.
Key to Table: P=Preferred Lubricant Choice; A= Acceptable Alternative;
M=Mixture of Miner Oil and Alkyl Benzene (AB) with 50% AB.
(Information obtained from Heatcraft/Copeland)
R-407a, and
R-448/449
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