Daikin BHFQ23P907, Installation Manual

Page: 4 / 20

Installation manual
3
BHF1357
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)
1 2 3 4
A A B B 1 Main pipe, see table 4 on page 3
2 Joint (refer to "Restrictions on
installing the multi connection
piping kit" on page 2
)
3 Pipe between joint and the outdoor
unit A, see table 5 on page 3
4 Pipe between joint and the outdoor
unit B, see table 6 on page 3
24~32 Hp
1 2 3
≥
15
1 Joint or reducer
2 Cut in order to have a
fitting depth of
≥
15 mm
3 Field 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
B B
B B
B B
B
181 148 152 198
1 2 3 4
detail
5
152
211
283
58 63
105 181
Top view Front view