Mitsubishi Electric M Serie Manuel D'installation page 21

CAUTION
COIL UNDER PRESSURE
Always wear safety glasses when working
around pressurized devices. The air handlers are
shipped with a nitrogen holding charge in the coil.
Carefully follow these instructions when releasing
the charge.
Carefully remove the flare nut off the end of the
pipe to release any gas.
Pipe diameter Nut
inch (mm) (mm)
1/4 (6.35) (17)
3/8 (9.52) (22)
1/2 (12.7) (26)
5/8 (15.88) (29)
Refrigerant pipe processing
�""�-�
Wing nut type
Specifications are subject to change without notice.
SVZ-KP12, 18, 24, 30, 36NA
Both refrigerant lines need to be insulated all the
way up to the cabinet. Make sure the openings
in the cabinet around the refrigerant lines are
sealed. 3/8 in thick insulation is the minimum
recommended thickness. Based on ambient con-
ditions, local codes and line length, thicker insula-
tion may be desired.
Do not put any oil on the threaded portion of the
flare nuts. This may cause the flare nut to loosen
and leak refrigerant.
A inch (mm)
Clutch type
tool for R454B
0 to 0.02 (0 to
0.5)
Good
9�1
ra rn ra
-rn
Tilted Uneven Burred
,. -@-""�"' �
Flare nut
Fig. 4
21
Tightening torque
N•m lb•ft (kgf•cm)
13.7 to 17.7 10 to 13 (140 to 180)
34.3 to 41.2 25 to 30 (350 to 420)
49.0 to 56.4 36 to 42 (500 to 575)
73.5 to 78.4 54 to 58 (750 to 800)
m.
No good
Fig. 2
Sroooth all around
Fig. 5
Even length
all around
© 2024 Mitsubishi Electric US, Inc.
Burr
Copper pipe
�-s;�re reamer
Pipe rutter
{;;____\
Fig. 3
Inside is shin-
� ::i::::.�···
�
Fi g . 6
I