Daikin BHFQ23P907 User manual

INSTALLATION MANUAL
BHFQ23P907
BHFQ23P1357
Outdoor unit multi connection piping kit

Installation manual
1
BHFQ23P907+1357
Outdoor unit multi connection piping kit
4PW38477-1
This kit includes the following parts
Table 1
Field supply parts
Table 2
BHFQ23P907
BHFQ23P1357
Outdoor unit multi connection piping kit
Installation manual
IMPROPER INSTALLATION OR ATTACHMENT OF EQUIPMENT OR ACCESSORIES COULD RESULT IN ELECTRIC SHOCK, SHORT-
CIRCUIT, LEAKS, FIRE OR OTHER DAMAGE TO THE EQUIPMENT. BE SURE ONLY TO USE ACCESSORIES MADE BY DAIKIN WHICH
ARE SPECIFICALLY DESIGNED FOR USE WITH THE EQUIPMENT AND HAVE THEM INSTALLED BY A PROFESSIONAL.
IF UNSURE OF INSTALLATION PROCEDURES OR USE, ALWAYS CONTACT YOUR DAIKIN DEALER FOR ADVICE AND
INFORMATION.
Shape
Kit
name Suction gas joint HP/LP gas joint Liquid joint Equalizer joint Suction gas reducer HP/LP gas reducer Liquid reducer
Insulation
Gas
(a)
Liquid
—
1x 1x 1x 1x 1x 1x 1x 1x 1x 2x 1x
1x 1x 1x 2x 1x 1x 2x 2x
1x 1x 1x 1x 1x 3x 1x 2x 4x 2x
(a) For both suction gas pipes and HP/LP gas pipes
BHFQ23P907
ID Ø31.8
ID Ø28.6
ID Ø28.6
ID Ø25.4
ID Ø19.1
ID Ø22.2
ID Ø25.4
ID Ø25.4
ID Ø28.6
ID Ø22.2
ID Ø28.6
ID Ø25.4
ID Ø19.1
ID Ø22.2
ID Ø25.4
ID Ø22.2
ID Ø19.1
ID Ø12.7
ID Ø9.5
ID Ø15.9
ID Ø15.9
ID Ø19.1
ID Ø22.2
ID Ø25.4
OD Ø25.4
ID Ø28.6
(1)
ID Ø19.1
ID Ø22.2
ID Ø25.4
OD Ø25.4
ID Ø28.6
(2)
ID Ø34.9
OD Ø31.8
(3)
ID Ø25.4
OD Ø25.4
(1)
ID Ø19.1
ID Ø22.2
OD Ø25.4
(2)
ID Ø9.5
ID Ø12.7
OD Ø15.9
(1)
BHFQ23P1357
ID Ø38.1
ID Ø31.8
ID Ø28.6
ID Ø31.8
ID Ø25.4
(1)
ID Ø31.8
ID Ø28.6
ID Ø28.6
ID Ø25.4
ID Ø19.1
ID Ø22.2
ID Ø25.4
(1)
ID Ø22.2
ID Ø19.1
ID Ø15.9
ID Ø19.1
ID Ø15.9
(1)
ID Ø19.1
ID Ø22.2
ID Ø25.4
OD Ø25.4
ID Ø28.6
(1)
ID Ø28.6
ID Ø31.8
OD Ø31.8
(2)
ID Ø19.1
ID Ø22.2
ID Ø25.4
OD Ø25.4
ID Ø28.6
(3)
ID Ø25.4
OD Ø25.4
(1)
ID Ø19.1
ID Ø22.2
OD Ø25.4
(2)
ID Ø9.5
ID Ø12.7
OD Ø15.9
(1)
ID Ø31.8
ID Ø28.6
ID Ø28.6
ID Ø25.4
ID Ø19.1
ID Ø22.2
ID Ø25.4
(2)
ID Ø25.4
ID Ø28.6
ID Ø22.2
ID Ø28.6
ID Ø25.4
ID Ø19.1
ID Ø22.2
ID Ø25.4
(2)
ID Ø19.1
ID Ø15.9
ID Ø12.7
ID Ø9.5
ID Ø15.9
(2)
ID Ø41.3
OD Ø38.1
(4)
ID Ø34.9
OD Ø31.8
(5)
ID Ø22
ID Ø26
OD Ø26
ID Ø28
(3)
NOTE
■ Do not throw away any of the accessories until installation is completed.
■ Be sure to read this manual before installation and follow the instructions carefully when performing installation.
■ For installation of the outdoor units, refer to the installation manual of the outdoor unit.
■ The installation of refrigerant pipes between outdoor and indoor units needs to be arranged by refnet joints and refnet
headers, and is to be purchased separately.
■ For combination of outdoor units follow Engineering Data.
Parts
Quantity
Selection procedure907 1357
Insulation for pipes
1 set See "Pipe size selection and cutting position of the joint" on
page 3 and on page 10.
Connection pipes
Joint
(angle
of 90°)
Suction gas pipes 1x 1x The joint size must be the same as
the gas pipe size of the outermost
outdoor unit. Refer to “Pipe size
selection and cutting position of the
joint” on page 3 and page 10.
HP/LP gas pipes 2x 2x
Equalizer pipes 4x 5x
Tape 1 set For insulation.
Parts
Quantity
Selection procedure907 1357

BHFQ23P907+1357
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 mm
>500 mm
■ 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
AB
1 2
ABC
3
BHFQ23P907 BHFQ23P1357
A≥BA≥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

Installation manual
3
BHFQ23P907+1357
Outdoor unit multi connection piping kit
4PW38477-1
F
OR
BHFQ23P907
Pipe size selection and cutting position of the joint
Select the correct pipe size according the tables below and cut the
joints and reducers on the correct cutting point with a pipe cutter.
Table 4
■ Select the pipe size in function of the total capacity of the
outdoor unit.
■ When upsizing the main pipe, use gas reducer (3).
■ When using pipes of Ø19.1 or larger, make sure to use pipes
with 1/2H temper grade with a wall thickness of 1.0 mm. In case
there is no alternative and you use the O temper grade for pipes
with Ø19.1, a minimal wall thickness of 1.2 mm or more is
required and connections need to be brazed.
Upsizing main pipe
For units with total capacity of 24~32 Hp, the suction gas reducer (3)
has to be used. Connect the reducer to the suction gas joint as
shown in the figure below.
Table 5
Table 6
■ Cut the pipe with a pipe cutter.
I
N CASE OF FRONT PIPING
1. E
XTERIOR
2. D IMENSIONS FOR INSTALLATION
Refer to the installation manual of the outdoor unit for
selection and restrictions for the piping between outdoor
branches. Not observing restrictions on the interconnecting
piping may result in malfunctioning of the unit.
Total capacity
of outdoor
units
Pipe size
(a)
(a) OD x minimum wall thickness (temper grade type)
Suction gas HP/LP gas Liquid
18 Hp Ø28.6x1.0 (1/2H) Ø22.2x1.0 (1/2H) Ø15.9x1.0 (O)
20~22 Hp Ø28.6x1.0 (1/2H) Ø28.6x1.0 (1/2H) Ø15.9x1.0 (O)
24 Hp Ø34.9x1.21 (1/2H) Ø28.6x1.0 (1/2H) Ø15.9x1.0 (O)
26~32 Hp Ø34.9x1.21 (1/2H) Ø28.6x1.0 (1/2H) Ø19.1x1.0 (1/2H)
Total capacity
of outdoor
units
Pipe size
(a)
(a) OD x minimum wall thickness (temper grade type)
Suction gas HP/LP gas Liquid
18 Hp Ø22.2x1.0 (1/2H) Ø19.1x1.0 (1/2H) Ø9.5x0.80 (O)
20~24 Hp Ø28.6x1.0 (1/2H) Ø19.1x1.0 (1/2H) Ø12.7x0.80 (O)
26~32 Hp Ø28.6x1.0 (1/2H) Ø22.2x1.0 (1/2H) Ø12.7x0.80 (O)
Total capacity
of outdoor
units
Pipe size
(a)
(a) OD x minimum wall thickness (temper grade type)
Suction gas HP/LP gas Liquid
18 ~22 Hp Ø22.2x1.0 (1/2H) Ø19.1x1.0 (1/2H) Ø9.5x0.80 (O)
24+28 Hp Ø28.6x1.0 (1/2H) Ø19.1x1.0 (1/2H) Ø12.7x0.80 (O)
26 Hp Ø22.2x1.0 (1/2H) Ø19.1x1.0 (1/2H) Ø9.5x0.80 (O)
30+32 Hp Ø28.6x1.0 (1/2H) Ø22.2x1.0 (1/2H) Ø12.7x0.80 (O)
123 4
AABB1Main pipe, see table 4 on page 3
2Joint (refer to "Restrictions on
installing the multi connection
piping kit" on page 2)
3Pipe between joint and the outdoor
unit A, see table 5 on page 3
4Pipe between joint and the outdoor
unit B, see table 6 on page 3
24~32 Hp
12 3
≥15
1Joint or reducer
2Cut in order to have a
fitting depth of ≥15 mm
3Field pipe
1 Liquid joint 4 HP/LP gas joint
2 To indoor unit 5 Equalizer pipe
3 Suction gas joint
A 300 mm (standard)
1 Liquid pipe
2 Suction gas pipe
3 HP/LP gas pipe
4 Equalizer pipe
5 Bottom frame
NOTE
In case dimension A exceeds 300 mm, extend the field
supplied interconnection piping between the joint and
the outdoor unit.
2
1
3
4
5
BBBB
B B
B
181 148 152 198
12 3 4
detail 5
152
211
283
58 63
105 181
Top view Front view

BHFQ23P907+1357
Outdoor unit multi connection piping kit
4PW38477-1
Installation manual
4
3. I NSTALLATION OF SUCTION GAS AND
HP/LP GAS PIPES
Cutting the field supplied gas pipes
Use the following tables in case dimension A is 300 mm (refer to
"Dimensions for installation" on page 3.
If dimension A exceeds 300 mm, extend the L dimension of the
suction gas pipes 1 and 2 and HP/LP gas pipes accordingly.
■For suction gas pipes only
For L dimension of suction gas pipes 1 and 2, dimension B of
the field supplied angled joint as in table 8 on page 4 has been
taken into account. If dimension B of the angled joint you use is
different from that dimension B, adjust the L dimension of
suction gas pipes 1 and 2 accordingly.
Table 7
Table 8
■For HP/LP gas pipes only
For L dimension of HP/LP gas pipes 1, 2 and 3, dimension B of
the field supplied angled joint as in table 10 on page 4 has been
taken into account. If dimension B of the angled joint you use is
different from that dimension B, adjust the L dimension of HP/LP
gas pipes 1, 2 and 3 accordingly.
Table 9
Table 10
Cutting suction gas reducer (1) and HP/LP gas
reducer (2)
Connection piping
■Connect the suction gas and HP/LP gas pipes as shown in the
figure below.
Before connecting the pipes, first connect the suction gas joint
and the suction gas reducer (1), the HP/LP gas joint and the
HP/LP gas reducers (1) and (2).
■See "Dimensions for installation" on page 3 for the location
(height) of the joint.
■Refer to the installation manual delivered with the outdoor unit for
cautions on brazing pipes.
■Keep the joint in a horizontal position, see view Ain the figure
below.
■Connect the HP/LP gas reducer (1) by tilting it ±50° and connect
the HP/LP gas reducer (2), see view Ain the figure below.
■Refer to "Pipe size selection and cutting position of the joint" on
page 3 for the cutting requirements.
Outdoor unit Pipe 1
L (mm) Pipe 2 L (mm)
18 Hp 61 238
20+22 Hp 135 238
24 Hp 135 234
26 Hp 135 238
28~32 Hp 135 234
Outdoor unit
Joint (angle of 90°) (field supply)
B (mm)
18~22 Hp 23
24 Hp 29
26 Hp 23
28~32 Hp 29
Outdoor unit Pipe 1
L (mm) Pipe 2 L (mm) Pipe 3 L (mm)
18~24 Hp 50 245 59
26+28 Hp 80 245 59
30+32 Hp 80 239 47
Outdoor unit
Joint (angle of 90°) (field supply)
B (mm)
18~28 Hp 17
30+32 Hp 23
Suction gas
reducer (1) HP/LP gas reducer (2)
1Connection to suction gas
pipe 1 (field supply)
2Connection to suction gas joint
3Cutting position
4Connection to HP/LP gas pipe 1
(field supply)
5Connection to HP/LP gas
reducer (1)
6No cutting for 18~24 Hp
L
B
B
L
B
B
18 Hp
20~32 Hp
14
2
33
6
26~32 Hp
5
1Suction gas accessory pipe (1) supplied with the outdoor unit
2Suction gas pipe (1) (field supply) refer to table 7 on page 4
3HP/LP gas accessory pipe (1) supplied with the outdoor unit
4Suction gas joint
5HP/LP gas joint
6Suction gas reducer (1)
7HP/LP gas reducer (1)
8HP/LP gas reducer (2)
9HP/LP gas pipe (1) (field supply) refer to table 9 on page 4
10 HP/LP gas pipe (field supply) (select the pipe length on site)
11 Suction gas pipe (field supply) (select the pipe length on site)
12 Joint (1) (angle of 90°) (field supply) refer to table 8 on page 4
13 HP/LP gas pipe (3) (field supply) refer to table 9 on page 4
14 Joint (2) (angle of 90°) (field supply) refer to table 10 on page 4
15 Suction gas pipe (2) (field supply) refer to table 7 on page 4
16 HP/LP gas pipe (2) (field supply) refer to table 9 on page 4
17 Suction gas accessory pipe (2) supplied with the outdoor unit
18 HP/LP gas accessory pipe (2) supplied with the outdoor unit
50°
5
15
14 1611 17 18131210
7 854
13
69
2
4
A
A
view
0°±15
0°±15

Installation manual
5BHFQ23P907+1357
Outdoor unit multi connection piping kit
4PW38477-1
4. INSTALLATION OF LIQUID PIPES AND
EQUALIZER PIPES
Cutting the field supplied equalizer pipes
Use the following tables in case dimension A is 300 mm (refer to
"Dimensions for installation" on page 3.
If dimension A exceeds 300 mm, extend the L dimension of the
equalizer pipes 1 and 2 accordingly.
For L dimension of equalizer pipes 1 and 2, dimension B of the field
supplied angled joint as in table 12 on page 5 has been taken into
account. If dimension B of the angled joint you use is different from
that dimension B, adjust the L dimension of the equalizer pipes 1 and
2 accordingly.
Table 11 Table 12
Cutting liquid reducer (1)
Connection piping
■Connect the liquid pipes and equalizer pipes as shown in the
figure below.
Before connecting the pipes, first connect the liquid joint and the
liquid reducer (1).
■Refer to "Dimensions for installation" on page 3.
■Keep the joint in a horizontal position as shown in view A in the
figure below
■Connect the liquid reducer (1) in an angle of 40° and bend the
field supplied liquid pipe up to the stop valve as shown in the
figure, see view A in the figure below.
■Refer to the installation manual delivered with the outdoor unit
for cautions on brazing pipes.
■Refer to "Pipe size selection and cutting position of the joint" on
page 3 for the cutting requirements.
5. AFTER CONNECTION OF THE PIPING
Connection piping between the outdoor and indoor unit
All piping must be executed according to instructions in the
installation manual of the outdoor unit and an air tight test must be
performed after complete installation of the piping.
Insulation of joints
Step 1: Fit the insulation (1) around the reducer (2) and keep it in
place with tape ( ) (3).
Step 2: Fit the insulation (4) around the joint (5) and keep it in place
with tape ( ) (6) without leaving a gap between the two insulated
parts.
Step 3: Seal the seam between the insulation and the field piping
insulation ( ) with tape ( ) (7).
Step 4: Cover the insulated parts completely with tape ( ) without
leaving any gaps (8).
Equalizer pipe Joint (angle of 90°)
Pipe 1 (L mm) Pipe 2 (L mm) B (mm)
95 60 17
1Connection to liquid pipe (field supply)
2Connection to liquid joint
3Cutting position
4No cutting for 18 Hp
LB
B
20~32 Hp
1
2
3
4
1Liquid accessory pipe (1) supplied with the outdoor unit
2Liquid pipe (1) (field supply) (select the pipe length on site)
3Equalizer accessory pipe (1) supplied with the outdoor unit
4Liquid joint
5Liquid reducer (1)
6Joint (angle of 90°) (field supply) refer to table 12 on page 5
7Equalizer pipe (2) (field supply) refer to table 11 on page 5
8Equalizer pipe (1) (field supply) refer to table 11 on page 5
9Liquid pipe (field supply) (select the pipe length on site)
10 Equalizer pipe (field supply) (select the pipe length on site)
11 Liquid accessory pipe (2) supplied with the outdoor unit
■All required tape is field supply.
■In case of indoor installation, make sure that the tape
is of the fireproof type in order to comply with local
regulations.
8 3611 7
40°
10 4
9
8
10
54 6 7
2
13
0°±15
A
A
view
12
3
5
6
78
4
321 4
3

BHFQ23P907+1357
Outdoor unit multi connection piping kit
4PW38477-1
Installation manual
6
INCASE OF LOWER FRONT PIPING
1. EXTERIOR
2. DIMENSIONS FOR INSTALLATION
Dimensions for standard installation
3. INSTALLATION OF SUCTION GAS AND
HP/LP GAS PIPES
Cutting the field supplied gas pipes
Use the following tables for standard installation (refer to
"Dimensions for installation" on page 6).
If the dimensions exceed these of the standard installation, extend
the L dimension of the suction gas pipes 1~4 and HP/LP gas pipes
1~5 accordingly.
■For suction gas pipes only
For L dimension of suction gas pipes 1~4 dimension B of the
field supplied angled joint as in table 14 on page 6 has been
taken into account. If dimension B of the angled joint you use is
different from that dimension B, adjust the L dimension of
suction gas pipes 1~ 4 accordingly.
Table 13
Table 14
■For HP/LP gas pipes only
For L dimension of HP/LP gas pipes 1~5 dimension B of the field
supplied angled joint as in table 16 on page 6 has been taken
into account. If dimension B of the angled joint you use is
different from that dimension B, adjust the L dimension of HP/LP
gas pipes 1~5 accordingly.
Table 15
Table 16
1Liquid joint 3To indoor unit
2HP/LP gas joint 4Suction gas joint
5Equalizer pipe
A300 mm (standard)
1Liquid pipe
2Suction gas pipe
3HP/LP gas pipe
4Equalizer pipe
5Bottom frame
NOTE When the dimensions exceed these of the standard
installation, extend the pipes between the outdoor unit
and the joint accordingly (field supply).
AAAA
3
2
1
4
5
121
167
186
260
2
69
109
A
detail 12 3 45
181 148 152 198
Outdoor
unit Pipe 1 L (mm) Pipe 2 L (mm) Pipe 3 L (mm) Pipe 4 L (mm)
18 Hp 216 181 102 244
20+22 Hp 212 181 168 244
24 Hp 212 177 168 232
26 Hp 212 181 168 244
28~32 Hp 212 177 168 232
Outdoor unit
Joint (angle of 90°) (field supply)
Joint 1
B (mm) Joint 2 B (mm)
18 Hp 23 23
20+22 Hp 29 23
24 Hp 29 29
26 Hp 29 23
28~32 Hp 29 29
Outdoor
unit Pipe 1 L (mm) Pipe 2 L (mm) Pipe 3 L (mm) Pipe4 L (mm) Pipe 5 L (mm)
18~24 Hp 223 193 73 233 64
26+28 Hp 217 193 97 233 64
30+32 Hp 217 187 97 221 52
Outdoor unit
Joint (angle of 90°) (field supply)
Joint 3
B (mm) Joint 4 B (mm)
18~24 Hp 17 17
26+28 Hp 23 17
30+32 Hp 23 23
L
B
B
L
B
B

Installation manual
7BHFQ23P907+1357
Outdoor unit multi connection piping kit
4PW38477-1
Cutting suction gas reducer (1) and HP/LP gas reducer (2)
Connection piping
■Connect the suction gas and HP/LP pipes as shown in the figure
below. Before connecting the pipes, first connect the suction gas
joint and the suction gas reducer (1), the HP/LP joint and the
HP/LP reducer (1) and (2).
■See "Dimensions for installation" on page 6 for the location
(height) of the joint.
■Refer to the installation manual delivered with the outdoor unit for
cautions on brazing pipes.
■Keep the joint in a horizontal position (see view A).
■Connect the HP/LP gas reducer (1) by tilting it ±40° and connect
the HP/LP gas reducer (2), see view Ain the figure below.
■Refer to "Pipe size selection and cutting position of the joint" on
page 3 for the cutting requirements.
4. INSTALLATION OF LIQUID PIPES AND
EQUALIZER PIPES
Cutting the field supplied equalizer pipes
Use the following tables for standard installation (refer to
"Dimensions for installation" on page 6).
If dimension differ from standard installation, adjust the L dimension
of the equalizer pipes 1 and 2 accordingly.
For L dimension of equalizer pipes 1 and 2, dimension B of the field
supplied angled joint as in table 12 on page 5 has been taken into
account. If dimension B of the angled joint you use is different from
that dimension B, adjust the L dimension of the equalizer pipes 1 and
2 accordingly.
Table 17
Cutting liquid reducer (1)
Connection piping
■Connect the liquid pipes and equalizer pipes as shown in the
figure below.
Before connecting the pipes, first connect the liquid joint and the
liquid reducer (1).
■Refer to "Dimensions for installation" on page 6.
■Keep the joint in a horizontal position as shown in view A in the
figure below
■Connect the liquid reducer (1) in an angle of ±90° and bend the
field supplied liquid pipe up to the stop valve as shown in the
figure.
■Refer to the installation manual delivered with the outdoor unit
for cautions on brazing pipes.
■Refer to "Pipe size selection and cutting position of the joint" on
page 3 for the cutting requirements.
Suction gas
reducer (1) HP/LP gas reducer (2)
1Connection to suction gas
pipe 1 (field supply)
2Connection to suction gas joint
3Cutting position
4Connection to HP/LP gas pipe 1
(field supply)
5Connection to HP/LP gas
reducer (1)
6No cutting for 18~24 Hp
1HP/LP gas accessory pipe (1) supplied with the outdoor unit
2Suction gas accessory pipe (1) supplied with the outdoor unit
3HP/LP gas pipe (1) (field supply) refer to table 15 on page 6
4Suction gas pipe (1) (field supply) refer to table 13 on page 6
5Joint (1) (angle of 90°) (field supply) refer to table 14 on page 6
6Joint (3) (angle of 90°) (field supply) refer to table 16 on page 6
7HP/LP gas pipe (3) (field supply) refer to table 15 on page 6
8Suction gas joint
9Suction gas pipe (3) (field supply) refer to table 13 on page 6
10 HP/LP gas joint
11 Suction gas reducer (1)
12 HP/LP gas reducer (2)
13 HP/LP gas reducer (1)
14 Suction gas pipe (field supply) (select the pipe length on site)
15 HP/LP gas pipe (field supply) (select the pipe length on site)
16 Suction gas pipe (4) (field supply) refer to table 13 on page 6
17 Joint (2) (angle of 90°) (field supply) refer to table 14 on page 6
18 Joint (4) (angle of 90°) (field supply) refer to table 16 on page 6
19 HP/LP gas pipe (5) (field supply) refer to table 15 on page 6
20 HP/LP gas pipe (4) (field supply) refer to table 15 on page 6
21 Suction gas pipe (2) (field supply) refer to table 13 on page 6
22 HP/LP gas pipe (2) (field supply) refer to table 15 on page 6
23 Suction gas accessory pipe (2) supplied with the outdoor unit
24 HP/LP gas accessory pipe (2) supplied with the outdoor unit
18 Hp
20~32 Hp
14
2
33
6
26~32 Hp
5
40°
24
18 20
8
10
232221
19 181716 181514
11 128
17
12345
13
9 10
7
6
A
A
0°±15
view
0°±15
Equalizer pipe
Pipe 1 (L mm) Pipe 2 (L mm)
95 120
1Connection to liquid pipe (field supply)
2Connection to liquid joint
3Cutting position
4No cutting for 18 Hp
L
20~32 Hp
1
2
3
4

BHFQ23P907+1357
Outdoor unit multi connection piping kit
4PW38477-1
Installation manual
8
5. AFTER CONNECTION OF THE PIPING
Connection piping between the outdoor and indoor unit
All piping must be executed according to instructions in the
installation manual of the outdoor unit and an air tight test must be
performed after complete installation of the piping.
Insulation of joints
Step 1: Fit the insulation (1) around the reducer (2) and keep it in
place with tape ( ) (3).
Step 2: Cut the insulation (5) along the slit (4). Fit the insulation
around the joint (6) and keep it in place with tape ( ) (7) without
leaving a gap between the two insulated parts.
Step 3: Seal the seam between the insulation and the field piping
insulation ( ) with tape ( ) (8).
Step 4: Cover the insulated parts completely with tape ( ) without
leaving any gaps (9).
INCASE OF BOTTOM PIPING
1. EXTERIOR
2. INSTALLATION OF SUCTION GAS AND
HP/LP GAS PIPES
Cutting the field supplied and unit supplied gas pipes
■For suction gas pipes only
For L dimension of suction gas pipe 1, dimension B of the field
supplied angled joint as in table 8 on page 4 has been taken into
account. Further, connection of gas pipes and the field supplied
joints for same diameter are of the type without stoppers. If
dimension B of the angled joint you use is different from that
dimension B and/or if the joints for same diameter pipes have
stopppers, adjust the L dimension of suction gas pipes 1
accordingly.
Table 18 (for outdoor unit B)
1Liquid accessory pipe (1) supplied with the outdoor unit
2Liquid joint
3Liquid reducer (1)
4Liquid pipe (1) (field supply) (select the pipe length on site)
5Joint (angle of 90°) (field supply) refer to table 12 on page 5
6Equalizer pipe (2) (field supply) refer to table 17 on page 7
7Equalizer pipe (1) (field supply) refer to table 17 on page 7
8Liquid pipe (field supply) (select the pipe length on site)
9Equalizer accessory pipe (1) supplied with the outdoor unit
10 Equalizer pipe (field supply) (select the pipe length on site)
11 Liquid accessory pipe (2) supplied with the outdoor unit
■All required tape is field supply.
■In case of indoor installation, make sure that the tape
is of the fireproof type in order to comply with local
regulations.
90°
11 2
A
7 9511 69
7
10
3 42 5 6
1
8
A
0°±15
view
1
2
5
321 4
3
4
6 8
7
9
8
1Liquid pipe 3Suction gas pipe
2HP/LP gas pipe 4
Equalizer pipe
Outdoor
unit
Suction gas accessory pipe (2)
(delivered with the unit) Suction gas pipe 1 (field supply)
B (mm) L (mm)
18~22 Hp 0(b) 137
24 Hp 41 98
26 Hp 0(b) 137
28~32 Hp 41 98
a = cutting position
b = no cutting required
85
109
1
07
1
68
310
A
A
AA
AA
A
detai
l
AA
AB
49
4
4
44
4
B
aL

Installation manual
9BHFQ23P907+1357
Outdoor unit multi connection piping kit
4PW38477-1
■For HP/LP gas pipes only
For L dimension of HP/LP gas pipes 1~3, dimension B of the
field supplied angled joint as in table 10 on page 4 has been
taken into account. Further, connection of gas pipes and the
field supplied straight size joints are of the type without stoppers.
If dimension B of the angled joint you use is different from that
dimension B and/or if the straight size joints have stopppers,
adjust the L dimension of HP/LP gas pipes 1~3 accordingly.
Table 19
Cutting suction gas reducer (1) and (2) and HP/LP gas
reducer (2)
Connection piping
■Remove the knockout plate on the bottom frame. Refer to the
installation manual delivered with the outdoor unit.
■Connect the suction gas and HP/LP gas pipes as shown in the
figure below.
Before connecting the pipes, first connect the suction gas joint
and the suction gas reducer (1), the HP/LP gas joint and the
HP/LP gas reducers (1) and (2).
■Refer to the installation manual delivered with the outdoor unit for
cautions on brazing pipes.
■Keep the joint in a horizontal position, see view Ain the figure
below.
■Connect the HP/LP gas reducer (1) by tilting it ±50° and connect
the HP/LP gas reducer (2) (see view A).
■Refer to "Pipe size selection and cutting position of the joint" on
page 3 for the cutting requirements.
3. INSTALLATION OF LIQUID PIPES AND
EQUALIZER PIPES
Cutting liquid reducer (1)
Connection piping
■Remove the knockout plate on the bottom frame. Refer to the
installation manual delivered with the outdoor unit.
■Connect the liquid pipes and equalizer pipes as shown in the
figure below.
Before connecting the pipes, first connect the liquid joint and the
liquid reducer (1).
■Keep the joint in a horizontal position, see view Ain the figure
below.
■Bend the field supplied liquid pipe up to the stop valve as shown
in the figure below.
■Refer to the installation manual delivered with the outdoor unit
for cautions on brazing pipes.
■Refer to "Pipe size selection and cutting position of the joint" on
page 3 for the cutting requirements.
Outdoor unit
Pipe 1
L (mm) Pipe 2 L (mm) Pipe 3 L (mm)
(field supply) (field supply) (field supply)
18~28 Hp 155 86 94
30+32 Hp 119 110 82
Suction gas
reducer (1) Suction gas reducer (2) HP/LP gas reducer (2)
1Connection to suction
gas pipe 1 (field supply)
2Connection to suction
gas joint
3Cutting position
4Connection to suction
gas pipe (field supply)
5Connection to HP/LP gas
pipe 1 (field supply)
6Connection to HP/LP gas
reducer (1)
7No cutting for 18~24 Hp
L
18 Hp
20~32 Hp
145
2
33
7
26~32 Hp
6
18~22+26 Hp
24+28~32 Hp
3
2
1Suction gas accessory pipe (1) supplied with the outdoor unit
2HP/LP gas joint
3Suction gas joint
4Suction gas reducer (1)
5HP/LP gas reducer (2)
6Suction gas reducer (2)
7HP/LP gas reducer (1)
8Joint (4) (angle of 90°) (field supply) refer to table 10 on page 4
9HP/LP gas accessory pipe (1) supplied with the outdoor unit
10 HP/LP gas pipe (2) (field supply) refer to table 19 on page 9
11 HP/LP gas pipe (3) (field supply) refer to table 19 on page 9
12 Suction gas pipe (field supply) (select the pipe length on site)
13 HP/LP gas pipe (field supply) (select the pipe length on site)
14 Suction gas accessory pipe (2) supplied with the outdoor unit refer to
table 19 on page 9
15 Suction gas pipe (1) (field supply) refer to table 18 on page 8
16 Joint (2) (angle of 90°) (field supply) refer to table 8 on page 4
17 HP/LP gas pipe (1) (field supply) refer to table 19 on page 9
18 Straight size joint (field supply)
19 HP/LP gas accessory pipe (2) supplied with the outdoor unit
1Connection to liquid pipe (field supply)
2Connection to liquid joint
3Cutting position
4No cutting for 18 Hp
A
32
view
A
1613 817
18
19
151412
87643
10
2 51
9 8 11
50°
0°±15
0°±15
20~32 Hp
1
2
3
4