Piping Connection For Outdoor Unit - Hitachi UTOPIA R32 Series Installation And Operation Manual

◆ Correct position of Line Branch E-SN/E-XN series
Horizontal
Locate the branch pipes on the same horizontal plane.
(Inclination within 30°)
Make the straight length a minimum of 0.5m after the
vertical bend.
Straight length
min 0.5m
Upward
Horizontally
Downward
Maximum
inclination of ±30°
(View from A)
Maximum
inclination of ±30°
◆ Correct position of distributor MH series
Perform to install horizontally always (Example: In case of model MH-108AN)
!
CAUTION
Seal the end of branch pipes which are not connected, by brazing factory supplied closing pipes.

5.8 Piping connection for outdoor unit

Do not apply two
spanners at this
position. If applied,
leakage will occur.
PMEN0654 rev.0 - 12/2023
Upward
Downward
Gas piping side
Liquid piping side
Stop valve
(spindle type)
Do not work with
two spanners here.
Flare nut
Refrigerant leakage
shall occur.
Vertical
Straight length of the pipe connection on the outdoor
unit side is made as follows:
- The collective pipe connection part is installed upward,
the straight length must be minimum 0.5 m.
- The collective pipe connection part is installed
downward, the straight length must be minimum 0.3 m.
Upward
Minimum straight
length of 0.5 m
Upward branch
Minimum
straight length
of 0.3 m
Downward
Horizontally
Horizontally
Use two spanners here for
pipe connection
Spindle type
Upward
Downward
branch
Downward
Don not apply two
spanners work here
Position to apply
spanners
Ball type
5
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