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Carrier 438MG series Installation Instructions Manual page 30

Multi-zone ductless split system size 18 to 48

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D: Flaring work Tightening Connection
Pipe gauge
Tightening
torque
153~163 kgf.cm
Ø1/4in/6.35
(15~16 N.m)
255~265 kgf.cm
Ø3/8in/9.52
(25~26N.m)
357~367 kgf.cm
Ø1/2in/12.7
(35~36 N.m)
459~480 kgf.cm
Ø5/8in/15.9
(45~47 N.m)
Excessive torque can break the nut
depending on the installation conditions.
The 24K indoor unit can only be connected with the
A system when the size of the low pressure valve
If there is a serious safety problem with the power supply, the technicians should refuse
to install the air conditioner and explain to the client that the problem must be resolved
before they can install the unit.
The creepage protector and main power switch, with a 1.5 times capacity of Max. Current
of the unit, should be installed in power circuit.
Connect all wires in accordance with the attached Electrical Connection Diagram located on
the panel of the outdoor unit.
An individual branch circuit and single receptacle, used only for this air conditioner, must be available.
.
Flare dimensin A
Flare
min
max
(in/mm)
0.33/8.3 0.34/8.7
90 ° ± 4
0.47/12.0
0.48/12.4
A
0.61/15.4
0.62/15.8
0.73/18.6
0.75/19.0
Unit:in/mm
1/4/6.35
3/8/9.52
1/4/6.35
1/2/12.7
1/4/6.35
5/8/15.9
shape
R0.016~0.031
0.4~0.8
30
(1/4in/6.35mm)
(3/8in/9.52mm)
(1/4in/6.35mm)
(3/8in/9.52mm)
(1/4in/6.35mm)
(1/2in/12.7mm)

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