A
PPLICATION
GUIDELINES
21
FRCC.PC.017.A1.02
I
NSTALLATION
Each Performer® Heat Pump scroll compressor is shipped with printed Instructions for installation.
Compressor handling and
storage
Compressor holding
charge
Compressors are provided with a lifting lug. This
lug should always be used to lift the compressor.
Once the compressor is installed, the lifting lug
should never be used to lift the complete instal-
lation. The compressor must be handled with
caution in the vertical position, with a maximum
inclination of 15° from vertical. Store the compres-
sor between -35°C and 50°C, not exposed to rain
or corrosive atmosphere.
Each compressor is shipped with a nominal dry
nitrogen holding charge between 0.4 bar and
0.7 bar, and is sealed with elastomer plugs. The
plugs should be removed with care to avoid oil
loss when the holding charge is released. Remove
the suction plug fi rst and the discharge plug af-
terwards. The plugs shall be removed only just
before connecting the compressor to the installa-
tion in order to avoid moisture entering the com-
pressor. When the plugs are removed, it is essen-
tial to keep the compressor in an upright position
to avoid oil spillage.
System cleanliness
The refrigerant compression system, regardless
of the type of compressor used, will only pro-
vide high effi
ciency and good reliability, along
with a long operating life, if the system contains
solely the refrigerant and oil it was designed for.
Any other substances within the system will not
improve performance and, in most cases, will be
highly detrimental to system operations.
The presence of non-condensable substances and
system contaminants, such as metal shavings, sol-
der and fl ux, have a negative impact on compres-
sor service life. Many of these contaminants are
small enough to pass through a mesh screen and
can cause considerable damage within a bearing
assembly. The use of highly hygroscopic POE and
PVE oils in R407C and R410A compressors requires
that the oil be exposed to the atmosphere just as
little as possible.
System contamination is one of main factors af-
fecting equipment reliability and compressor
service life. It is important therefore to take sys-
tem cleanliness into account when assembling a
refrigeration system.
During the manufacturing process, circuit con-
tamination may be caused by:
• Brazing and welding oxides,
• Filings and particles from the removal of burrs
in pipe-work,
• Brazing fl ux,
• Moisture and air.
Consequently, when building equipment and
assemblies, the following precautions must be
taken: never drill holes into the pipe-work after
installation.
Compressor mounting
Maximum inclination from the vertical plane,
while operating must not exceed 7 degrees. All
compressors are delivered with 4 rubber grom-
mets and metal sleeves. Compressors must al-
ways be mounted with these grommets.
Brazing material
For copper suction and discharge fi ttings, use
copper-phosphorus brazing material. Sil-Fos®
and other silver brazing materials are also accept-
able. If fl ux is required for the brazing operation,
use coated rod or fl ux core wire. To avoid system
contamination, do not brush fl ux on.
Tube brazing procedure
Do not bend the compressor discharge or suc-
tion lines or force system piping into the com-
pressor connections, because this will increase
stresses that are a potential cause of failure.
Recommended brazing procedures and material,
are described on following page.
