Installing The Coupler Heat Insulation - Fujitsu R410A Installation Instruction

(3) When the flare nut is tightened properly by your hand, use a torque
wrench to finally tighten it.
Body side
CAUTION
Hold the torque wrench at its grip, keeping it in the right
angle with the pipe, in order to tighten the flare nut
correctly.
Flare nut
6.35 mm (1/4 in.) dia. 16 to 18 N·m (160 to 180 kgf·cm)
30 to 42 N·m (300 to 420 kgf·cm)
9.52 mm (3/8 in.) dia.
12.70 mm (1/2 in.) dia. 49 to 61 N·m (490 to 610 kgf·cm)
15.88 mm (5/8 in.) dia. 63 to 75 N·m (630 to 750 kgf·cm)
Do not remove the cap from the connection pipe before connecting
the pipe.
CAUTION
Be sure to connect the large pipe after connecting the small
pipe completely.
Holding spanner
Torque wrench
Tightening torque
4
INSTALLING THE COUPLER
HEAT INSULATION
After checking for gas leaks, insulate by wrapping insulation around the
two parts (large and small) of the indoor unit coupling, using the coupler
heat insulation.
After installing the coupler heat insulation, wrap both ends with vinyl tape
so that there is no gap.
Coupler heat insulation
Body
Be sure to overlap the
insulation
CAUTION
Must fit tightly against body without any gap.
No gap
Coupler heat insulation
- Continued on back -