d) Unscrew the nozzle from the spray gun and place the spray nozzle and its
wrench on the inside of the spray gun according to the instructions on the back
of the nozzle package. If the "aileron" of the nozzle key is pointing toward the
outlet of the spray tip, it is the setting for painting, if it is pointing toward the
gun, it is the setting for buildup.
IMPORTANT: do not attach the nozzle/spray tip until the hose and unit and hose
have been cleaned and free of residual preservatives for storage - see details in
the "Working with the unit" section.