Midea MFA-12HRN1, Общее руководство пользователя

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Installation of the Connecting Pipe MCAC-UTSM-2009-03
46 Installation
Insert a flare nut into a pipe and flare the pipe.
Refer to the following table for the dimension of flare nut spaces.
Pipe gauge Tightening torque
Flare dimension (A)
Flare shape
Min Max
Φ 6.4
15 ～ 16N.m
(153
～
163kgf.cm)
8.3 8.7
Φ 9.5
25
～
26N.m
(255 ～ 265 kgf.cm)
12.0 12.4
Φ 12.7
35
～
36 N.m
(357 ～ 367 kgf.cm)
15.4 15.8
Φ 15.9
45 ～ 47 N.m
(459
～
480 kgf.cm)
18.6 19.0
Φ 19.1
65
～
67 N.m
(663 ～ 684 kgf.cm)
22.9 23.3
2. Connect the indoor unit at first, then the outdoor unit.
z Bend the tubing in proper way. Do not harm to them.
z The bending angle should not exceed 90°.
z
Bending position is preferably in the middle of the bendable pipe. The larger the bending radius the
better it is.
z Do not bend the pipe more than three times.
z When connecting the flare nut, coat the flare both inside and outside with either oil or ester oil and
initially tighten by hand 3 or 4 turns before tighting firmly.
z Be sure to use both spanner and torque wrench together when connecting or disconnecting pipes to the unit.
Caution:
z
Too large torque will harm the bell mouthing and too small will cause leakage.
z After the connecting work is finished, be sure to check that there is no gas leak.