18
3 - HANDLING INSTRUCTIONS
Piping precautions
1. Position the O-Ring against the bulge in the
pipe when connecting hoses and pipes.
2. Coat the piping connections and the O-rings
with PAG oil.
3. Fit the nuts and unions tightly against the base
of the companion pieces, then hand tighten the
nut as much as possible. Then tighten to the
specified torque.
CAUTION!
Always use the specified oil for HFC-134a
and HFO-1234yf systems to coat the O-rings.
O-ring positions
CORRECT
INCORRECT
INCORRECT
O-ring
Pipe bulge
Apply oil thoroughly to these areas
Piping connection
Compressor / condenser connection
CORRECT
INCORRECT
Piping connection procedure
Nut
Union
Damage
Gnawing at pipe end
