Installation manual
11
EMRQ8~16ABY1
Daikin Altherma outdoor unit
4P501819-1 – 2017.08
9.
R
EFRIGERANT
PIPE
SIZE
AND
ALLOWABLE
PIPE
LENGTH
9.1.
Selection of piping material
■
Foreign materials inside pipes (including oils for fabrication)
must be
≤
30 mg/10 m.
■
Temper grade: use piping with temper grade in function of the
pipe diameter as listed in table below.
O = Annealed
1/2H = Half hard
9.2.
Selection of piping size
■
Size: determine the proper size referring to following table:
A. Piping between outdoor unit and first branch pipe
B. Piping between refrigerant branch kits
Choose from the following table in accordance with the indoor unit
total capacity type, connected downstream:
Example:
Total capacity connected downstream for B1 = capacity index
indoor 2 + capacity index indoor 3 = 240
C. Piping between refrigerant branch kit and indoor unit
Pipe size for direct connection to indoor unit must be the same as the
connection size of the indoor unit:
■
The pipe thickness of the refrigerant piping shall comply with the
applicable legislation. The minimal pipe thickness for R410A
piping must be in accordance with the table below.
■
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).
NOTE
Piping and other pressure containing parts shall
comply with the applicable legislation and shall be
suitable for refrigerant. Use phosphoric acid
deoxidised seamless copper for refrigerant.
Pipe Ø
Temper grade of piping material
≤
15.9
O
≥
19.1
1/2H
NOTE
■
Heating only indoor units need 2 pipes (liquid and
discharge only).
Indoor units capacity index
EKHBRD011
100
EKHBRD014
125
EKHBRD016
140
Refnet joint
Piping outer diameter size (mm)
Outdoor unit
capacity type (Hp)
Discharge gas pipe
Liquid pipe
8
15.9
9.5
10
19.1
9.5
12
19.1
12.7
14+16
22.2
12.7
NOTE
Never increase discharge gas pipe sizes.
A
B1
C
a
1
100
C
b
2
100
C
3
140
Piping outer diameter size (mm)
Indoor unit
capacity index
Discharge gas pipe
Liquid pipe
<
150
12.7
9.5
150
≤
x<200
15.9
9.5
200
≤
x<290
19.1
9.5
290
≤
x<420
19.1
12.7
420
≤
x<520
28.6
15.9
Piping outer diameter size (mm)
Discharge gas pipe
Liquid pipe
EKHBRD
15.9
9.5
Pipe
Ø
Minimal thickness t (mm)
6.4
0.80
9.5
0.80
12.7
0.80
15.9
0.99
19.1
0.80
22.2
0.80
28.6
0.99
4PEN501819-1.book Page 11 Wednesday, September 13, 2017 12:52 PM
