Hitachi UTOPIA R32 Series - 5.8 Piping Connection for Outdoor Unit

23
PMEN0654 rev.0 - 12/2023
5
PIPINGCONNECTIONFOROUTDOORUNIT
REFRIGERANT PIPING AND REFRIGERANT CHARGE
◆ Correct posion of Line Branch E-SN/E-XN series
Horizontal Vercal
Locate the branch pipes on the same horizontal plane.
(Inclinaon within 30°)
Make the straight length a minimum of 0.5m aer the
vercal bend.
Straight length of the pipe connecon on the outdoor
unit side is made as follows:
- The collecve pipe connecon part is installed upward,
the straight length must be minimum 0.5 m.
- The collecve pipe connecon part is installed
downward, the straight length must be minimum 0.3 m.
Maximum
inclinaon of ±30°
Straight length
min 0.5m
Downward
Upward
Maximum
inclinaon of ±30°
(View from A)
Horizontally
Upward
Downward
Upward
Upward branch
Minimum
straight length
of 0.3 m
Downward
branch
Downward
Minimum straight
length of 0.5 m
Downward
Upward
◆ Correct posion of distributor MH series
Perform to install horizontally always (Example: In case of model MH-108AN)
Horizontally
Horizontally
Gas piping side
Liquid piping side
! CAUTION
Seal the end of branch pipes which are not connected, by brazing factory supplied closing pipes.
5.8 Piping connecon for outdoor unit
Do not apply two
spanners at this
posion. If applied,
leakage will occur.
Stop valve
(spindle type)
Flare nut
Use two spanners here for
pipe connecon
Do not work with
two spanners here.
Refrigerant leakage
shall occur.
Spindle type
Posion to apply
spanners
Don not apply two
spanners work here
Ball type