Danfoss Performer SM Series, Selection & Application Manuallines

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installation
Maximum compressor test pressure (low side)
SM/SZ 084 - 185
360 psig
SZ/SY240 - 380
290 psig
Maximum compressor test pressure (high side) 460 psig
Maximum pressure difference between high
and low side of the compressor:
350 psig
Pressurize the system on the HP side first then the LP side to prevent scroll
rotation.
Compressor model
Leak detection with
refrigerant
Leak detection with a mass
spectrometer
SM-SY compressors Nitrogen & R-22 Nitrogen & Helium
SZ compressors Nitrogen & R-134a or R-407C Nitrogen & Helium
note 1: Leak detection with refrigerant may be forbidden in some countries.
Check local regulations.
note 2: The use of leak detecting additives is not recommended as they may affect the
lubricant properties.
system pressure test
Always use an inert gas such as
nitrogen for pressure testing. Never
use other gases such as oxygen, dry air or acetylene as these may form a
flammable mixture. Do not exceed the
following pressures:
Leak detection must be carried out
using a mixture of nitrogen and
refrigerant or nitrogen and helium,
as indicated in the table below. Never
use other gasses such as oxygen, dry air or acetylene as these may form an
inflammable mixture.
Pressurize the system on HP side first
then LP side.
leak detection
compressor.
•
Use a wire brush or wet cloth to
remove all remaining flux once the
joint has been soldered. Flux left
behind will cause corrosion.
ensure that no flux enters the
tubing or compressor. Flux is acidic
and can cause substantial damage
to the internal parts of the system
and compressor.
the polyolester oil used in sY /
sZ compressors is very hygroscopic
and will rapidly absorb moisture
from the air. the compressor must
not therefore be left open to the
atmosphere for a long period of
time. the compressor fitting plugs
must only be removed just before
brazing the compressor.
Before eventual unbrazing
the compressor or any system
component, the refrigerant charge
must be removed from both the high
and low pressure sides. Failure to
do so may result in serious personal
injury. pressure gauges must be
used to ensure all pressures are at
atmospheric level.
For more detailed information on
appropriate materials for brazing
or soldering, please contact the
material manufacturer or distributor.
For specific applications not covered
herein, please contact Danfoss for
information.