Daikin LRYEN-AY1, Installation And Operation Manual

13 Piping installation

Installation and operation manual

19

LRYELRNUN5A7Y1
CO

₂

 Conveni-Pack outdoor unit and capacity up unit

4P605461-1B – 2020.08

2

A

A2

B2

C2

B

C

D

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" 

[

4

 32] 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)