Daikin FUQ71CVEB Installation Manual page 15

Refrigerant piping can be connected from 3 directions.
• In case of upward piping, remove the piping penetration cover, make holes for penetrating piping by cut-
ting the cover with a cutter such as scissors.
After having the piping go through the cover, attach the cover to the indoor unit. (Refer to Fig. 19)
• The refrigerant is pre-charged in the outdoor unit.
• Use the flare nut attached to the air conditioner.
• When making a flare connection, coat the flared inner surface only with either oil or ester oil.
(Refer to Fig. 20)
Then, turn the flare nut 3 to 4 times with your hand and screw in the nut.
CAUTION
Do not have oil adhere to the screw fixing part of resin parts.
If oil adheres, it may weaken the strength of screwed part.
• When connecting the piping to the air conditioner, make sure to use a spanner and a torque wrench as
shown in Fig. 21.
For the dimension of flared part and the tightening torque, refer to the Table 1.
〈〈Example of unfavorable consequences〉〉
When tools other than spanners are used, the thread ridge of a flare nut will be damaged and cause gas
leakage due to defective tightening.
English
Electric wiring
Drain
Fig.19
Coat the flare inner surface
only with ether oil or ester oil.
Fig. 20
Flare nut
Union joint
Piping penetration cover
Gas
Liquid
Torque wrench
Spanner
Fig. 21
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