Gree GTHCA-K6DNA1A/I Mode D'emploi page 22

5.2.3 Connecting the Pipe at the Indoor Unit Side
Detach the caps and plugs from the pipes.
① .
Be sure to apply the pipe against the port on the indoor unit correctly. If the centering is
improper, the flare nut cannot be tightened smoothly. If the flare nut is forced to turn, the
threads will be damaged.
② .
Do not remove the flare nut until the connection pipe is to be connected so as to prevent
dust and impurities from coming into the pipe system.
When connecting the pipe to the unit or removing it from the unit, please do use
both the spanner and the torque wrench. (Fig. 11)
When connecting, smear both inside and outside of the flare nut with
refrigeration oil, screw it hand tight and then tighten it with the spanner.
Refer to Table 7 to check if the wrench has been tightened properly (too tight
would mangle the nut and lead to leakage).
Examine the connection pipe to see if it leaks, then take the treatment of heat
insulation, as shown in the Fig. 12.
Use the medium-sized sponge to insulate the coupler of the gas pipe.
CAUTION!
Fig. 11
Fig. 12
Table 5 Flare nut tightening torque
18
Floor Ceiling Type Unit