Unit installation

Maintenance
84 SCXF-SVX01K-EN
Compressors
Scroll Compressor Failure Diagnosis and
Replacement
If compressor failure is suspected, refer to COM-SVN01A-
EN for detailed information regarding compressor failure
diagnosis and replacement of scroll compressors.
Important: Should compressor replacement of a
manifold set be required DO NOT alter
manifold piping.The design is critical to
proper refrigerant flow.
40 Ton Air-Cooled Compressor Suction
Restrictor Replacement
The 40T air-cooled unit has a manifold compressor set on
one circuit. A restrictor in the 10 ton compressor suction
connection balances refrigerant flow. Instructions below
are for installation if compressor replacement is required.
Refrigerant System
Should refrigerant system repair be required, LeakTest,
Brazing and Evacuation Procedures are described.
Preliminary Charging is described in the Installation-
Mechanical section, “Preliminary Refrigerant Charging,”
p. 35 and Final Charging is described in Start-up section,
“Final Refrigerant Charge,” p. 76.
Ignore Air Cooled Only steps for Water Cooled systems.
Refrigerant systems that have been opened must have
filter driers replaced and complete leak test and
evacuation before recharging.
Refrigerant Leak Test Procedure
Figure 48. Right-side view of the self contained unit
Figure 49. Restrictor installation
Restrictor
WARNING
Confined Space Hazards!
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. Failure
to take appropriate precautions or to react properly to
such potential hazards could result in death or serious
injury.
WARNING
Hazard of Explosion!
Never use an open flame to detect gas leaks. It could
result in an explosion. Use a leak test solution for leak
testing. Failure to follow recommended safe leak test
procedures could result in death or serious injury or
equipment or property-only-damage.
WARNING
Hazard of Explosion!
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 mixtures of a hydrogen
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. Failure to follow
these recommendations could result in death or serious
injury or equipment or property-only damage.