82
SCXF-SVX01T-EN
Figure 44. Right-side view of the self-contained unit
Compressors
Scroll Compressor Failure Diagnosis and
Replacement
If compressor failure is suspected, refer to COM-SVN01*-
EN for detailed information regarding compressor failure
diagnosis and replacement of scroll compressors.
Refrigerant System
If refrigerant system repair is required, Leak Test, Brazing
and Evacuation Procedures are described.
Preliminary charging is described in the Installation–
Mechanical section, “Preliminary Refrigerant
Charging,” p. and final charging is described in the
Startup section, “Final Refrigerant Charge,” p. 74.
Refrigerant systems that have been opened must have
filter driers replaced and complete leak test and evacuation
before recharging.
Refrigerant Leak Test Procedure
WARNING
Confined Space Hazards!
Failure to follow instructions below could result in
death or serious injury.
Do not work in confined spaces where refrigerant or
other hazardous, toxic, or flammable gas may be
leaking. Refrigerant or other gases could displace
available oxygen to breathe, causing possible
asphyxiation or other serious health risks. Some
gases may be flammable and/or explosive. If a leak in
such spaces is detected, evacuate the area
immediately and contact the proper rescue or
response authority.
WARNING
Explosion Hazard!
Failure to follow safe leak test procedures below
could result in death or serious injury or equipment or
property-only-damage.
Never use an open flame to detect gas leaks. Use a
leak test solution for leak testing.
WARNING
Explosion Hazard!
Failure to follow these instructions could result in
death or serious injury or equipment or property-only
damage.
Use only dry nitrogen with a pressure regulator for
pressurizing unit. Do not use acetylene, oxygen or
compressed air or mixtures containing them for
pressure testing. Do not use hydrogen mixtures
containing refrigerant and air above atmospheric
pressure for pressure testing as they may become
flammable and could result in an explosion.
Refrigerant, when used as a trace gas should only be
mixed with dry nitrogen for pressurizing units.
WARNING
Explosion Hazard!
Failure to follow instruction below could result in
death or serious injury.
Do not exceed unit nameplate design pressures when
leak testing system.
Maintenance
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