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Refrigeration
Service Procedures
•
Always use gas detection equipment when working on
R-290 systems
•
Set the alarm to 15% of the LFL (Lower Flammability
Level)
•
Make sure all ignition sources are removed from the
work area
•
Maintain a 35' area work area free of any ignition source
•
Flames, sparks, and static electricity can ignite leaking
refrigerant
•
Always reclaim and purge system (twice) before using
torch on system
•
Always run the unit a minimum of 5 minutes before
reclaiming refrigerant
•
Follow evacuation (500 microns minimum) & purging
procedures
Passive recovery
62
Charging with R-290
•
Charging with R-290 is similar to charging systems with
hydrocarbons
•
Like all blend refrigerants, R-290 systems must be
charged with liquid to maintain correct composition of
the blend
•
Be sure that the unit is grounded before charging
•
It is very important to take care NOT to overfill the
system
•
Hydrocarbon charge sizes are typically 40% to 50% less
than that of fluorocarbons
Section 8
Part Number GA_SM 08/18
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