Daikin LRYEN10A7Y1 [19/44] Piping installation
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Daikin LRYEN10A7Y1 [19/44] Piping installation

Daikin LRYEN10A7Y1 [19/44] Piping installation
13 Piping installation
Installation and operation manual
19
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1B – 2020.08
2
A A2
B2 C2
B
CD
G
J
j
f
F
E2
D2
E
H4
H3
H1
H1
H2
e d
g
c a b2
a2
e2
d2
c2
1
3
5
4
4
5
5
3
H4
1 Capacity up unit (LRNUN5*)
2 Outdoor unit (LRYEN10*)
3 Indoor unit (showcase)
4 Indoor unit (blower coil)
5 Indoor unit (air conditioning)
A~J Liquid piping (side showcases and blower coils)
A2~E2 Liquid piping (side air conditioning)
a~g Gas piping (side showcases and blower coils)
a2~e2 Gas piping (side air conditioning)
H1~H4 Height difference
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 the following chapters:
▪ For outdoor unit without capacity up unit: "15.2 To determine
additional refrigerant amount"[432].
▪ For outdoor unit with capacity up unit: see "15.2To determine
additional refrigerant amount"[432] but additional refrigerant is
not needed because the capacity up unit is already precharged.
Piping size between outdoor unit and first branch
When the equivalent pipe length between outdoor unit and the
furthest indoor unit is 90m or more (b+d), the size of the main gas
pipe (b) must be increased (size-up). If the recommended gas pipe
(size-up) is not available, you must use the standard size (which
might result in a small capacity decrease).
e
d
b
c
a
a Outdoor unit
b Main gas pipe
c First refrigerant branch
d Piping between indoor unit and refrigerant branch
e Furthest indoor unit
System side Piping outer diameter size
(mm)
(a)
Liquid side Gas side
Refrigeration Ø12.7×t0.85
(K65)
Ø15.9×t1.05
(K65)
Air conditioner Ø15.9×t1.05
(K65)
Ø19.1×t1.3
(K65)
(a)
For refrigeration piping (A, B, a) and for air conditioner piping (A2,
a2)
Piping size between branching areas or between
first and second branch
Indoor unit capacity
index (kW)
Piping outer diameter size (mm)
Refrigeration side: liquid pipe
(a)
x≤10.0 Ø9.5×t0.65 (K65)
10.0<x Ø12.7×t0.85 (K65)
Refrigeration side: gas pipe
(a)
x≤6.5 Ø9.5×t0.65 (K65)
6.5<x≤14.0 Ø12.7×t0.85 (K65)
14.0<x Ø15.9×t1.05 (K65)
Air conditioner side: liquid pipe
(b)
— Ø12.7×t0.85 (K65)
Air conditioner side: gas pipe
(b)
— Ø15.9×t1.05 (K65)
(a)
Piping between branching areas (C, D, c, d)
(b)
Piping from first branch to second branch (B2, b2)
Piping size from branch to indoor unit
Piping outer diameter size (mm)
Gas pipe Liquid pipe
Refrigeration side
(a)
Same size as C, D, c, d.
If piping sizes of the indoor units are different, connect a reducer
close to the indoor unit to align piping sizes.
Air conditioner side
(b)
Ø12.7×t0.85 (K65) Ø9.5×t0.65 (K65)
(a)
Piping from branch to indoor unit (E, F, G, J, e, f, g, j)
(b)
Piping from branch to indoor unit (C2, D2, E2; c2; d2; e2)

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