Daikin RXYSQ-TAV User Manual

4 Preparation
Installation and operation manual
8
RXYSQ8~12TMY1B
VRV IV-S system air conditioner
4P400263-1F – 2017.02
▪ Foreign materials inside pipes (including oils for fabrication) must
be ≤30mg/10m.
4.2.2 Refrigerant piping material
▪ Piping material: Phosphoric acid deoxidised seamless copper.
▪ Piping temper grade and thickness:
Outer diameter
(Ø)
Temper grade Thickness (t)
(a)
6.4mm (1/4")
9.5mm (3/8")
12.7mm (1/2")
Annealed (O) ≥0.80mm
t
Ø
15.9mm (5/8") Annealed (O) ≥0.99mm
19.1mm (3/4")
22.2mm (7/8")
Half hard (1/2H) ≥0.80mm
25.4mm (1") Half hard (1/2H) ≥0.88mm
28.6mm (1‑1/8") Half hard (1/2H) ≥0.99mm
(a) Depending on the applicable legislation and the unit's
maximum working pressure (see "PS High" on the unit
name plate), larger piping thickness might be required.
4.2.3 To select the piping size
Determine the proper size referring to following tables and reference
figure (only for indication).
INFORMATION
▪ Combination of VRVDX and RADX indoor units is not
allowed.
▪ Combination of RA DX and AHU indoor units is not
allowed.
▪ Combination of RADX and aircurtain indoor units is not
allowed.
INFORMATION
In case of RXYSQ8: If you install RADX indoor units, you
have to configure field setting [2‑41] (= type of installed
indoor units). See "6.1.8 Mode 2: Field settings" on
page23.
In case of RXYSQ10+12: The type of indoor units is
detected automatically.
A
B-1 B-2
C-1 C-2 C-3 C-4 E E E E
1 1
3-1 3-2 3-3 3-4
A
D
RA DXVRV DX
D
4
4
5 5 5 5
2 2
2 2
1 Outdoor unit
2 Refrigerant branch kits
3-1~3-4 VRVDX indoor units
4 BP units
5 RADX indoor units
A Piping between outdoor unit and (first) refrigerant branch
kit
B-1 B-2 Piping between refrigerant branch kits
C-1~C-4 Piping between refrigerant branch kit and indoor unit
D Piping between refrigerant branch kit and BP unit
E Piping between BP unit and RADX indoor unit
In case the required pipe sizes (inch sizes) are not available, it is
also allowed to use other diameters (mm sizes), taken the following
into account:
▪ Select the pipe size nearest to the required size.
▪ Use the suitable adapters for the change-over from inch to mm
pipes (field supply).
▪ The additional refrigerant calculation has to be adjusted as
mentioned in "5.6.2 To determine the additional refrigerant
amount"on page15.
A: Piping between outdoor unit and (first)
refrigerant branch kit
When the equivalent pipe length between outdoor and indoor units is
90m or more, the size of the main pipes (both gas side and liquid
side) must be increased. Depending on the length of the piping, the
capacity may drop, but even in such a case the size of the main
pipes has to be increased. More specifications can be found in the
technical engineering data book.
a
e
b c
d
a Outdoor unit
b Main pipes
c Increase
d First refrigerant branch kit
e Indoor unit
Outdoor unit
capacity type (HP)
Piping outer diameter size (mm)
Gas pipe Liquid pipe
Standard Size-up Standard Size-up
8 19.1 22.2 9.5 12.7
10 22.2 25.4
(a)
12 25.4
(b)
28.6 12.7 15.9
(a) If size is NOT available, increase is NOT allowed.
(b) If size is NOT available, increase to 28.6mm is allowed.
B: Piping between refrigerant branch kits
Choose from the following table in accordance with the indoor unit
total capacity type, connected downstream. Do not let the
connection piping exceed the refrigerant piping size chosen by the
general system model name.
Indoor unit capacity
index
Piping outer diameter size (mm)
Gas pipe Liquid pipe
<150 15.9 9.5
150≤x<200 19.1
200≤x<290 22.2
290≤x<390 28.6 12.7
Example: Downstream capacity for B-1 = capacity index of unit 3-1
+ capacity index of unit 3-2
C: Piping between refrigerant branch kit and
indoor unit
Use the same diameters as the connections (liquid, gas) on the
indoor units. The diameters of the indoor units are as follows:
Indoor unit capacity
index
Piping outer diameter size (mm)
Gas pipe Liquid pipe
15~50 12.7 6.4

Daikin RXYSQ-TAV Specifications

General

Brand	Daikin
Model	RXYSQ-TAV
Category	Air Conditioner
Language	English