Installation manual

ManualsBrandsDaikin ManualsAir ConditionerRQYQ26PY1B

9 English

Pipe Sizes Selection

Piping between Outdoor Unit ~ Refrigerant Branch Connection (Part A)

Calculation Method of Re-charging Amount of

Refrigerant

Re-charging Amount R (kg)

( • Round off at 2 places of decimals for R.)

NOTE:

THE ADDITIONAL REFRIGERANT CHARGING AMOUNT BEFORE TEST

RUN IS ONLY CORRECTION VALUE BY OUTDOOR UNIT CAPACITY.

(unit:mm)

R= +

+ +

R= 45 0.18 + 23 0.12 + 195 0.059 + 40 0.022 + 2.8 =26.045

i+ra+b c+d+e+f+g+h+s

26.0 kg

×0.37

Example for refrigerant branches using REFNET joints and REFNET headers

j+k Q22 type

< for individual systems >

< for multi-connecting systems >

Indoor unit

Outdoor unit

Part D

Part E Part A Part B Part C

Part E

Part A

• Select from below chart according to system name of the outdoor unit.

• When equivalent piping length between outdoor unit ~ indoor unit is 90m or

longer, sizes of main pipes on the gas and liquid sides (Part A) must be

enlarged.

Piping between Refrigerant Branch Connection ~ Indoor Unit (Part E)

• Match to the size of the connection piping on the indoor unit.

*1 Existing pipes must meet the condition of design pressure 3.3MPa.

Specificly, to confirm that the (pipe) thickness must not be less than the

required minimum thickness instructed in the installation manual (1).

*2 Existing pipes must be connected at Part A.

Piping between Outdoor unit multi Connection Piping kit (Part B)

• Select from below chart according to individual capacity type of constructing

outdoor unit.

Piping between Outdoor unit multi Connection Piping Kit ~ Outdoor Unit (Part C)

• Select from below chart according to individual capacity type of constructing

outdoor unit.

Q8 type

Q10 type

Q12 type

Q14 type

Q16 type

Q18~22 type

Q24 type

Q26~34 type

Q36~48 type

φ19.1

φ22.2

φ28.6

φ34.9

φ41.3

φ28.6

φ34.9

φ41.3

φ54.1

φ9.5

φ12.7

φ15.9

φ19.1

φ15.9

φ19.1

φ22.2

System name of

outdoor unit

gas pipe liquid pipe

standard size

max. size

standard size

max. size

[gas side]

Q8 type : φ19.1 → φ22.2

Q10 type : φ22.2 → φ25.4*

Q12, 14 type : Not lncreased

Q16~22 type : φ28.6 → φ31.8

Q24 type : Not lncreased

Q26~34 type : φ34.9 → φ38.1

Q36~48 type : Not lncreased

[liquid side]

Q8, 10 type : φ9.5 → φ12.7

Q12~16 type : φ12.7 → φ15.9

Q18~24 type : φ15.9 → φ19.1

Q26~48 type : φ19.1 → φ22.2

* If available on the site, use this size.

Otherwise it can not be increased.

Piping between Refrigerant Branch kits (Part D)

• Select from below chart according to total capacity of indoor units connected

down-stream.

(Note)

Sizes of connection pipings must not exceed main pipe sizes (Part A).

(unit:mm)

< 150

150 ≤ x < 200

200 ≤ x < 290

290 ≤ x < 420

420 ≤ x < 640

640 ≤ x < 920

920 ≤ x

φ15.9

φ19.1

φ22.2

φ28.6*

φ34.9

φ41.3

φ19.1

φ25.4

φ28.6

φ34.9

φ54.1

φ9.5

φ12.7

φ15.9

φ19.1

φ12.7

φ15.9

φ19.1

φ22.2

Total capacity of

indoor units

gas pipe liquid pipe

standard size

max. size

standard size

max. size

(unit:mm)

P20 · 25 · 32 · 40 · 50 type

P63 type *φ12.7 appliable

P80 type

P100 · 125 · 140 type

P200 type

P250 type

φ12.7

φ15.9*

φ15.9

φ19.1

φ22.2

φ15.9

φ19.1

φ25.4

φ28.6

φ6.4

φ9.5

φ12.7

Capacity type of

indoor unit

gas pipe liquid pipe

standard size

max. size

standard size

max. size

total length (m)

of liquid pipe

size at

φ22.2

×0.022

total length (m)

of liquid pipe

size at

φ6.4

×0.26

total length (m)

of liquid pipe

size at

φ19.1

×0.18

total length (m)

of liquid pipe

size at

φ15.9

×0.12

total length (m)

of liquid pipe

size at

φ12.7

×0.059

total length (m)

of liquid pipe

size at

φ9.5

Q8 0kg Q18 0.7kg Q28 4.1kg Q38 4.8kg Q48 6.0kg

Q10 0.7kg Q20 2.1kg Q30 3.7kg Q40 6.2kg

Q12 2.1kg Q22 2.8kg Q32 4.0kg Q42 4.7kg

Q14 1.7kg Q24 4.2kg Q34 2.7kg Q44 6.1kg

Q16 2.0kg Q26 2.7kg Q36 4.1kg Q46 5.7kg

(Example)

When outdoor unit is Q22

type and each piping

length is as right.

a : φ15.9 × 40 m

b : φ15.9 × 5 m

c : φ9.5 × 35 m

d : φ9.5 × 35 m

e : φ9.5 × 35 m

f : φ9.5 × 35 m

g : φ9.5 × 30 m

h : φ9.5 × 20 m

i :φ12.7 × 20 m

j : φ6.4 × 20 m

k : φ6.4 × 20 m

r : φ12.7 × 3 m

s : φ9.5 × 5 m

∗Note 1

Allowable length after the first refrigerant branch kit to indoor units is 40 m or less, however it can be extended up to 90 m if all the following conditions are satisfied. (In case of “ Branch with REFNET joint ” )

* If available on the site,

use this size.

Otherwise it can not be

increased.

Required Conditions Example Drawings

1. It is necessary to increase the pipe size if the pipe length between the first branch

kit and the final branch kit is over than 40m. (Reducers must be procured on site)

If the increased pipe size is larger than main pipe size, then increase the main pipe

size to the same pipe size.

4. The difference between

[Outdoor unit to the farthest indoor unit] and [Outdoor unit to the nearest indoor unit]

≤ 40 m

2. For calculation of Total extension length, the actual length of above pipes must be

doubled. (except main pipe and the pipes that are not increased)

3. Indoor unit to the nearest branch kit ≤ 40 m

8 b+c+d+e+f+g+p≤ 90 m

increase the pipe size of b, c, d, e, f, g

a+b×2+c×2+d×2+e×2+f×2+g×2

+h+i+j+k+l+m+n+p≤ 300 m

h, i, j....... p ≤ 40 m

The farthest indoor unit 8

The nearest indoor unit 1

(a+b+c+d+e+f+g+p)-(a+h)≤ 40 m

Increase the pipe size as follows

φ 9.5 → φ12.7

φ12.7 → φ15.9

φ15.9 → φ19.1

φ19.1 → φ22.2

φ22.2 → φ25.4*

φ28.6 → φ31.8*

φ34.9 → φ38.1*

ABCDEFG

bcdef

hi j kl mn

1234567

Outdoor unit

REFNET joint (A-G)

Indoor units ( 1 - 8 )

*φ25.4 applicable in case of 290 ≤ x <420, if available on the site.

Correction value by outdoor unit capacity

01_EN_3P226891-13Q.fm Page 9 Thursday, December 2, 2010 10:15 AM