BHF1357
Outdoor unit multi connection piping kit
4PW38477-1
Installation manual
2
Selection procedure
Table 3
R
ESTRICTIONS
ON
INSTALLING
THE
MULTI
CONNECTION
PIPING
KIT
■
Install the joints horizontally, so that the caution label (1)
attached to the joint comes to the top.
Do not tilt the joint more than ±15° (see view
A
).
Do not install the joint vertically (see view
B
).
■
Make sure that the total length of the piping connected to the
joint is absolute straight for more than 500 mm. Only if a straight
field piping of more than 120 mm is connected, more than
500 mm of straight section can be ensured.
■
Improper installation may lead to malfunction of the outdoor unit.
Number of outdoor units
Kit name
2 units
BHFQ23P907
3 units
BHFQ23P1357
■
The quantity and selection procedure for use of joints
with an angle of 90° only apply to front connection
installations.
■
For lower front connection and bottom connection
installations, the quantity and selection procedure are
different. Please refer to the dedicated instructions.
■
Joints for pipes with the same diameter are only
needed for bottom connection installations. See
dedicated instructions for quantities and specifications.
A
1
0
°±
15
view
B
1
view
>120 m
m
>500 m
m
■
When installing the multi outdoor system, connect the
units as shown in the figure below.
If installed in a different order, the outdoor unit multi
connection piping kit may not fit properly and some
additional field supplied pipe size reducers may be
required.
Outdoor unit multi
connection piping kit type:
Unit capacity
:
1
To indoor unit
2
Outdoor unit multi connection piping kit (first branch)
3
Outdoor unit multi connection piping kit (second branch)
■
If the total capacity of the connected indoor units
exceeds the total capacity of the outdoor units,
cooling and heating performance may be reduced
when running the indoor units. Refer to the capacity
table in the Engineering Data Book for more details.
■
Use piping with temper grade in function of the pipe
diameter as listed in the table below.
■
The pipe thickness of the refrigerant piping must
comply with relevant local and national regulations.
The minimum pipe thickness for R410A piping must
be in accordance with the table below (for design
pressure of 4.0 MPa (40 bar)).
1 2
A
B
1 2
A
B
C
3
BHFQ23P907
BHFQ23P1357
A
≥
B
A
≥
B
≥
C
Temper grade
O type
1/2H type
Pipe Ø
6.4
9.5 12.7 15.9 19.1 22.2 25.4 28.6 31.8 34.9 38.1 41.3
Minimum
thickness
t (mm)
0.80 0.80 0.80 1.00 1.00 1.00 1.00 1.00 1.10 1.21 1.32 1.43
O = Annealed
1/2H = Half hard
