ENGLISH
Considerations
With line distribution method, it is possible to make the first or
the second main pipe distribution within the third branch.
And do not make the main pipe distribution, at or after the fourth
branch.
Branch method
Correct
Max. 40m
Line branch
1st. main piping
distribution
2nd. main piping
distribution
Branched pipe
of main piping
Indoor unit
Incorrect
1st. main piping
distribution
2nd. main piping
distribution
3rd. main piping distribution
Incorrect
Branch method in 3rd multi-kit
Correct (Distribution allowed)
Branch 1
Branch 2
Branch 3
Incorrect
Branch 1
Branch 2
Branch 3
(Main pipe distribution: Distribution from one multi-kit to two
multi-kits)
Installation position
• Horizontal installation
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.
Horizontal
Correct
Incorrect
Maximum inclination
of ±30º
Straight length
min 0.5m
Downward
Upward
Upward
Downward
Maximum inclination
of ±30º
• Vertical installation
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 min. 0.5m.
-
The collective pipe connection part is installed downward,
the straight length must be min.0.3m.
Vertical
Correct
Correct
Upward
Upward Branch
Upward
Minimum
straight length
of 0.3 m
Downward
branch
Downward
Downward
Minimum straight length
of 0.5 m
REFRIGERANT PIPING & REFRIGERANT CHARGE
PMML0354A rev.1 - 03/2015
17
