Daikin VRV III REYQ8PY1, Service Manual

Page: 425 / 452

Example of Connection (R-410A Type) Si37-701
414 Appendix
Outdoor unit multi connection piping kit and
Refrigerant branch kit selection
Pipe size selection
•
Refrigerant branch kits can only be used with R410A.
•
When multi outdoor system are installed, be sure to use the
special separately sold Outdoor unit multi connection piping
kit. (BHFP26P90 · 136).
(For how to select the proper kit, follow the table at right.)
•
Never use BHFP26M90 · 135, BHFP22M90 · 135P for M
type of this series or T joint (field supplyed).
How to select the REFNET joint
Piping between outdoor unit (*2) and refrigerant branch kit (part A)
How to select the REFNET header
When using REFNET joint at the first branch counted from the outdoor unit side,
choose from the following table in accordance with the outdoor unit capacity type.
(Example : REFNET joint A)
Choose from the following table in accordance with the outdoor unit system capacity type.
Piping between outdoor unit multi connection piping kit and outdoor unit (part C)
Temper grade and wall thickness for pipes
(Temper grade, O type and 1/2H type indicate the material type specified in JIS H 3300.)
Choose from the following table in accordance with the capacity type of
the outdoor unit connected.
Piping between outdoor unit multi connection piping kits (part B)
Choose from the following table in accordance with the total capacity of all
the outdoor units connected upstream.
Choose from the following table in accordance with the total capacity index of all
the indoor units connected below the REFNET header.
Indoor unit of FXY ~ P280 · 450 · 560 can not be connected below the REFNET header.
How to select the outdoor unit multi connection piping kit
(This is required when the system is multi outdoor unit system.)
Choose from the following table in accordance with the number of outdoor units.
Choose the REFNET joints other than the first branch from the following table in accordance
with the total capacity index of all the indoor units connected below the REFNET joint.
Outdoor unit capacity type
8,10HP type
12~22HP type
24HP type ~
Indoor unit total capacity index
x < 200
200
≤
x < 290
290
≤
x < 640
640
≤
x
Refrigerant branch kit name
KHRP25A33T
KHRKHRP25M72TP
KHRKHRP25M73TP
3 pipes
KHRP25A22T
KHRP25A33T
KHRKHRP25M72TP
KHRKHRP25M73TP
2 pipes
KHRP26A22T
KHRP26A33T
KHRP26A72T
Refrigerant branch kit name
Indoor unit total capacity index
x < 200
200
≤
x < 290
290
≤
x < 640
640
≤
x
Number of outdoor unit
2 units
3 units
Connecting piping kit name
BHFP26P90
BHFP26P136
3 pipes
KHRP25M33H
KHRKHRP25M72HP
KHRKHRP25M73HP
2 pipes
KHRP26M22H or KHRP26M33H
KHRP26M33H
KHRP26M72H
KHRKHRP26M73HP
Refrigerant branch kit name
Example for indoor units
connected downstream
Example REFNET joint C : Indoor units 5 + 6 + 7 + 8
Example REFNET joint B : Indoor units 7 + 8
Example REFNET header : Indoor units 1 + 2 + 3 + 4 + 5 + 6 Example REFNET header :
Indoor units 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8
The thickness of the pipes in the table shows
the requirements of Japanease High Pressure
Gas Controll low. (As of Jan. 2003)
The thickness and material shall be selected in
accordance with local code.
For an outdoor unit installation, make
the settings in accordance with the
following figure.
Outdoor unit
Equalizer pipe
(part D)
Piping between outdoor unit
multi connection piping kit
and outdoor unit (part C)
Piping between outdoor unit multi
connection piping kits (part B)
Piping between outdoor unit and
refrigerant branch kit (part A)
Outdoor unit
capacity type
8HP type
10HP type
12HP type
14,16HP type
18HP type
20,22HP type
24HP type
26~34HP type
36HP type
38~48HP type
Piping size (O. D.)
Piping size (O. D.)
Suction gas pipe
φ
19.1
φ
22.2
φ
28.6
φ
34.9
φ
41.3
HP/LP gas pipe
φ
15.9
φ
19.1
φ
22.2
φ
28.6
φ
34.9
Liquid pipe
φ
9.5
φ
12.7
φ
15.9
φ
19.1
Outdoor unit
capacity type
8,10HP type
12HP type
14,16HP type
Copper tube O. D.
Temper grade
Wall thickness
(Min. requirement)
Suction gas pipe
φ
22.2
φ
28.6
HP/LP gas pipe
φ
19.1
φ
22.2
Liquid pipe
φ
9.5 × 0.8
φ
12.7
φ
6.4
0.80
φ
9.5
0.80
φ
12.7
0.80
φ
15.9
0.99
φ
19.1
0.80
φ
22.2
0.80
φ
25.4
0.88
φ
28.6
0.99
φ
31.8
1.10
φ
34.9
1.21
φ
38.1
1.32
φ
41.3
1.43
Piping between refrigerant branch kits
Piping between refrigerant branch kit and BS unit
Piping between BS unit and refrigerant branch kit
Choose from the following table in accordance with the total capacity type of all the
indoor units connected downstream.
Piping between refrigerant branch kit, BS unit and indoor unit
Equalizer pipe (part D) (outdoor multi system only)
Match to the size of the connection piping on the indoor unit.
*1 Connection piping must not exceed the refrigerant Piping size between outdoor
unit and refrigerant branch kit (part A).
*2 When selecting 2 pipes line (gas pipe and liquid pipe), use Suction gas pipe
column for gas pipe and Liquid pipe column for liquid pipe.
Indoor capacity index
x < 150
150
≤
x < 200
200
≤
x < 290
290
≤
x < 420
420
≤
x < 640
640
≤
x < 920
920
≤
x
Suction gas pipe
φ
15.9
φ
19.1
φ
22.2
φ
28.6
φ
34.9
φ
41.3
HP/LP gas pipe
φ
12.7
φ
15.9
φ
19.1
φ
28.6
Liquid pipe
φ
9.5
φ
12.7
φ
15.9
φ
19.1
Indoor unit capacity type
20 · 25 · 32 · 40 · 50 type
63 · 80 · 100 · 125 type
200 type
250 type
gas pipe
φ
12.7
φ
15.9
φ
19.1
φ
22.2
Liquid pipe
φ
6.4
φ
9.5
Piping size (O. D.)
φ
19.1
(unit : mm)
(unit : mm)
Piping size (O. D.)
(unit : mm)
Piping size (O. D.)
(unit : mm)
(unit : mm)
1/2H type
O type