System Pressure Test; Leak Detection - Danfoss Performer SM Series Selection & Application Manuallines

installation

system pressure test

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.
Always use an inert gas such as
nitrogen for pressure testing. Never
use other gases such as oxygen, dry
Maximum compressor test pressure (low side)
Maximum compressor test pressure (high side)
Maximum pressure difference between high
and low side of the compressor:
Pressurize the system on the HP side first then the LP side to prevent scroll
rotation.
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
Leak detection with
Compressor model
SM-SY compressors
SZ compressors Nitrogen & R-134a or R-407C
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.
Before
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.
air or acetylene as these may form a
flammable mixture. Do not exceed the
following pressures:
SM/SZ 084 - 185
360 psig
air or acetylene as these may form an
inflammable mixture.
Pressurize the system on HP side first
then LP side.
Leak detection with a mass
refrigerant
Nitrogen & R-22
eventual unbrazing
SZ/SY240 - 380
290 psig
460 psig
350 psig
spectrometer
Nitrogen & Helium
Nitrogen & Helium
31