daikin europe, consulting sales section learning, our way vrv iii product selection piping selection

Daikin Europe, Consulting sales

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D a i k i n E u r o p e A c a d e m y

Learning, our way

VRV III

Product SelectionPiping selection


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Selection Considerations• Cooling Load calculations

• Heating Load calculations

• Internal and Ambient temp

• Building layout drawings

• Orientation

• Room Usage

• Fresh Air Requirements

• Air and temperature distribution

• Noise Levels

• Pipe Runs

• Unit Dimensions

• Aesthetics

• Planning Restrictions

• Possible future site expansion

Total or sensible capacity selection ?


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Outdoor and Indoor Unit selection is based on using the capacity index

To select indoor unit and unit combinations,to size pipe work and refnet joints, we use ‘Index’ numbers:

For example the index no of FXZQ20M7V1B is 20

Indoor unit size Capacity index

20 20

25 25

32 31.25

40 40

50 50

63 62.5

80 80

100 100

125 125

140 140

200 200

250 250


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Maximum Number of Indoor Units Connected to One Outdoor UnitOutdoor untis Indoor units I.U combination index

Cooling only Heat pump Heat recovery Maximal connectable Mininum Maximum

VRV III VRV III VRV II For VRVIII For VRVII

- RXYSQ4P7V3B - 6 - 50 130

RXQ5P7W1B RXYSQ5P7V3B - 8 8 62,5 162,5

- RXYSQ6P7V3B - 9 - 70 182

RXQ8P7W1B RXYQ8P7W1(B) REYQ8M7W1B 22 13 100 260






- RXYQ20P7W1(B) REYQ20M7W1B 42 20 250 650

- RXYQ22P7W1(B) REYQ22M7W1B 47 20 275 715

- RXYQ24P7W1(B) REYQ24M7W1B 51 22 300 780

- RXYQ26P7W1(B) REYQ26M7W1B 53 32 325 845

- RXYQ28P7W1(B) REYQ28M7W1B 56 32 350 910

- RXYQ30P7W1(B) REYQ30M7W1B 60 32 375 975

- RXYQ32P7W1(B) REYQ32M7W1B 64 32 400 1040

- RXYQ34P7W1(B) REYQ34M7W1B 64 32 425 1105

- RXYQ36P7W1(B) REYQ36M7W1B 64 34 450 1170

- RXYQ38P7W1B REYQ38M7W1B 64 36 475 1235

- RXYQ40P7W1B REYQ40M7W1B 64 38 500 1300

- RXYQ42P7W1B REYQ42M7W1B 64 40 525 1365

- RXYQ44P7W1B REYQ44M7W1B 64 40 550 1430

- RXYQ46P7W1B REYQ46M7W1B 64 40 575 1495

- RXYQ48P7W1B REYQ48M7W1B 64 40 600 1560

- RXYQ50P7W1B - 64 - 625 1625

- RXYQ52P7W1B - 64 - 650 1690

- RXYQ54P7W1B - 64 - 675 1755


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Branch selector box

Total index

No of indoor units connectable

System type No of BS boxes connectable

R410a REYQ8M 13

REYQ10M 16

BSVQ100MVE Min – Max

20 - 100

8 REYQ12 – 20M 20

REYQ22M 22


100 - 160

8 REYQ24 – 32M 32

REYQ34M 34


160 – 250

5

Size 50 is the smallest to be

connected

REYQ35M 36

REYQ38M 38

REYQ40 – 48M 40

Maximum Number of Indoor Units Connected to BS Boxes (required for Heat Recovery Systems)


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Based on High Fan Speed

For “Low Fan” Speed, capacityreduction is not published, but the correction factors from next slide may be used.

FXCQ

Indoor unit Selection


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Correction factors to calculate the unit 's capacity at low fan tap.

Class

Cooling Heating Cooling Heating Cooling Heating Cooling Heating Cooling Heating20 81% 77% 86% 83% 85% 82% 81% 78%25 81% 78% 86% 83% 85% 82% 88% 86% 81% 78%32 81% 78% 86% 84% 85% 82% 88% 86% 82% 79%40 83% 81% 82% 79% 82% 79% 85% 82% 86% 83%50 83% 81% 81% 77% 79% 75% 82% 79%63 86% 84% 84% 81% 89% 88% 83% 79%80 88% 85% 83% 81% 87% 85%

100 88% 85% 86% 84%125 84% 81% 87% 85% 82% 79%

Class

Cooling Heating Cooling Heating Cooling Heating Cooling Heating Cooling Heating20 71% 66% 91% 89% 91% 89%25 73% 68% 91% 89% 91% 89%32 89% 88% 72% 67% 83% 81% 83% 81%40 89% 87% 83% 81% 85% 83% 85% 83%50 89% 87% 87% 85% 86% 84% 86% 84%63 89% 87% 87% 85% 82% 79% 83% 81% 83% 81%80 89% 87%

100 87% 84% 86% 83%125 88% 85%200 91% 90%250 91% 90%

Correction factor

Correction factor Correction factor Correction factor Correction factor Correction factor

Correction factor Correction factor Correction factor Correction factorFXSQ-M

FXMQ-M FXHQ-M FXAQ-M FXLQ-M FXNQ-M

FXCQ-M FXZQ-M FXFQ-M FXKQ-M


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Select indoor units for room layout provided

Starting from Engineering data book EEDE06-2 page 795:Noise Levels details Engineering data book EEDE06-2 page 815Unit Dimensions Engineering data book EEDE06-2 page 798Air Distribution Engineering data book EEDE06-2 page 818

Make a record of Model, Fan speed, Total and Sensible Cooling duties

“Example (FXCQ) of where information can be found”

Indoor Unit Selection


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Room A - General OfficeRoom B - Meeting RoomRoom C - ManagerRoom D - Small officeRoom E - Reception

3 m 3 m

N

Room A8.0kw Sensible Cooling

Room B4.2 kw Sensible

Room C2.1 kw

Sensible

Room D2.5 kw

Sensible

Room E1.65 kwSensible

18 m

6 m

6 m

6 m3 m

3 m

Rooms A, B and E 400mm ceiling voidRoom C 200 mm ceiling voidRoom D no void (restricted floor space)Ceiling Height 2.7m

Internal design 23 deg C db 16 deg C wb

Ambient design 29 deg C db



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Possible Solution

Note: The low speed duties were calculated based on the correction factors shown in the previous table.

Required Sensible

Total Sensible

Room A 3 x FXFQ40M 8.0 kW High Speed 10.8 kW 9.0 kW

Room B 1 x FXSQ80M 4.2 kW Low Speed 5.97 kW 4.73 kW

Room C 1 x FXLQ40M 2.1 kW Low Speed 3.06 kW 2.3 kW

Room D 1 x FXAQ40M 2.5 kW High Speed 3.60 kW 3.31 kW

Room E 1 x FXSQ32M 1.65 kW Low Speed 2.31 kW 1.88 kW


Internal design 23 deg C db 16 deg C wb

Ambient design 29 deg C db


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Condensing Unit Selection Considerations

• Remember the maximum index connectable

• Remember the maximum number of indoor units

• Cooling Only, Heat Pump or Heat Recovery

• Positioning

• Noise levels

• Service Access space required


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6 m3 m

Room A

Room BRoom C

Room DRoom E

18 m

6 m

6 m

3 m

Condensing Unit Base

FXFQ40M FXFQ40M FXFQ40M

FXSQ80MFXLQ40M

FXAQ40MFXSQ32M

Condensing Unit Selection


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Example: using Inverter 2 pipe Heat Pump

Room A 3 x FXFQ40M 120Room B 1 x FXSQ80M 80Room C 1 x FXLQ40M 40Room D 1 x FXAQ40M 40Room E 1 x FXSQ32M 31.25Total Index 311.25

Suitable Condensing UnitRXYQ10P7W1

OutdoorUnit

Indoor Unit Combination Index

Minimum Maximum

RXYQ5P7W1RXYQ8P7W1/REYQ8MRXYQ10P7W1/REYQ10M

62.5100125

162.5260325


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Room A 3 x FXFQ40M 120Room B 1 x FXSQ80M 80Room C 1 x FXLQ40M 40Room D 1 x FXAQ40M 40Room E 1 x FXSQ32M 31.25Total Index 311.25

Suitable Condensing UnitRXYQ10P7W1

Look up condensing unit duty from EEDE06–2 page 196At indoor temperature of 16 deg C wb and outdoor temp 29 deg C dbTotal Cooling with index of 308 = 24,8 kWTotal Cooling at index of 336 = 27.0 kWIndex connected = 336 – 311.25 = 24.7527,0 kW – 24,8 = 2.2 kW336 – 308 = 282.2 kW/28 = 0.0785 kW24.75 x 0.0785 = 1.944 kW


Example: using Inverter 2 pipe heat pump

27.0 kW – 1.944 kW= 25.055 kW


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Condensing Unit SelectionExample: using Inverter 2 pipe heat pump (Back to the original data selected at high speed)

Calculate corrected indoor unit capacityRXYQ10M total cooling = 25.05kWFXFQ40M = (40 x 25.05) = 3.22 kW total

311. 25Reduce sensible by the same proportion prior to correction calculation Don’t forget to apply correction for low speed when necessary:FXSQ80 = (80 x 25.05) x 0.87 = 5,60 kW total 311.25FXSQ80 = 4.73 x 5,60 = 4.44 kW sensible 5.97

Corrected

Index Total Sensible Total Sensible

Room A = 3 x FXFQ40M (high speed) 120 10.80kW 9.0kW 9,66kW 8,04kW

Room B = 1 x FXSQ80M (low speed) 80 5.97 kW 4.73 kW 5,60 kW 4.44kW

Room C = 1 x FXLQ40M (low speed) 40 3.06 kW 2.3kW 2.73 kW 2.05kW

Room D = 1 x FXAQ40M (high speed) 40 3.6kW 3.3Kw 3.22Kw 2.96Kw

Room E = 1 x FXSQ32M (low speed) 31.25 2.37kW 1.88kW 2.08kW 1.69 kW

Total index 311.25


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Not yet ?


Are we finished ?

Required

Sensible

Corrected

Total Sensible

Room A = 3 x FXFQ40M 8.0 kW High Speed 9,66kW 8,04kW

Room B = 1 x FXSQ63M 4.2 kW Low Speed 5,60 kW 4.44kW

Room C = 1 x FXLQ40M 2.1 kW Low Speed 2.73 kW 2.05kW

Room D = 1 x FXAQ40M 2.5 kW High Speed 3.22Kw 2.96Kw

Room E = 1 x FXSQ25M 1.65 kW Low Speed 2.08kW 1.69 kW


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Table RXYQ10P

For Room B FXSQ80MRun = 20mLevel difference = Outdoor unit 3m below indoor unit

Capacity reduction factor = 0.98

Look up capacity correction ratio on page 294 of EEDE06-2

Pipe Length Correction


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6 m3 m

Room A

Room BRoom C

Room DRoom E

18 m

6 m

6 m

3 m

Condensing Unit Base

FXSQ80M

FXAQ40MFXSQ32M


FXLQ40M



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Outdoor situated below

Indoor units(H=m)

(Change in Cooling Capacity)

0

0

Outdoor situated above

Indoor units

10

20

30

40

50

10

20

30

40

0 10

20

30

40

50

60

70

80

90

(H=m)

0.870.90

0.92

0.98

Example:

0.92 0.850.90 0.87

1.0

0.95

0.98

Outdoor unit 3m belowIndoor unit

100 110

0.85

0.95

1.0


……..190 m


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Corrected Pipe length Correction factor required

Pipe length corrected

Total Sensible Total Sensible

Room A = 1 x FXFQ40M

= 1 x FXFQ40M

= 1 x FXFQ40M

9,66kW 8,04kW 15M

11M

7M

0.99

0.99

0.99

3,18kW

3,18kW

3,18kW

2.66kW

2.66kW

2.66kW

Room B = 1 x FXSQ80M 5,60 kW 4.44kW 20M 0.98 5,49kW 4.35kW

Room C = 1 x FXLQ40M 2.73 kW 2.05kW 16M 0.98 2,68kW 2.02kW

Room D = 1 x FXAQ40M 3.22Kw 2.96Kw 10M 0.99 3.18kW 2,93kW

Room E = 1x FXSQ32M 2.08kW 1.69 kW 4M 1.00 2.06kW 1.67kW


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Defrost operation protects the outdoor unit coil against freezing:

• Happens in heating mode

• Performs once max every 2 hours

• Duration: between 4 and 8 min

• During defrost: outdoor/indoor units’ fans are stopped

• No heating is delivered during defrost

• Limited cooling is delivered (heat recovery models)

• Capacity tables do not take account of this capacity reduction

• The heating capacity should be ammended by a correction factor:

Additional correction due to Defrost operation


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If selected fan coil unit corrected duty is too low, then that unit has to be re-selected and the complete procedure repeated

Summary of selection after corrections

Room A = 3 x FXFQ40M 8.0 kW High Speed 10,66kW 8,04kW

Room B = 1 x FXSQ80M 4.2 kW Low Speed 5,49kW 4.35kW

Room C = 1 x FXLQ40M 2.1 kW Low Speed 2,68kW 2.02kW

Room D = 1 x FXAQ40M 2.5 kW High Speed 3.18kW 2,93kW

Room E = 1 x FXSQ32M 1.65 kW Low Speed 2.06kW 1.67kW

Required sensible

Result total

Result sensible


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Would this suit Heat Recovery?

Room A

Room BRoom C

Room DRoom E

FXSQ80M

FXSQ32M

Meeting Room


FXLQ40M

FXAQ40M


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Room A

Room BRoom C

Room DRoom E

Condensing Unit Basewith REYQ10M


FXSQ80MFXLQ40M

FXSQ32M

BS Box

FXAQ40M

VRVII Heat Recovery: selection of BS Boxes


20 - 100


100 - 160


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VRV III “P7” Series

Selection byVRV Express


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VRV Express

VRV Selection SoftwareVRV Selection Software


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VRV Express


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Material list

Model Qty Description

REYQ12M 1 Heat recovery VRV M R410A

REYQ8M 1 Heat recovery VRV M R410A

BSVQ100M 4 Branch selector unit R410A

BSVQ160M 3 Branch selector unit R410A

FXAQ40M 1 A - Wall mounted unit

FXFQ50M 2 F - 4-way blow ceiling mounted cassette

FXFQ80M 2 F - 4-way blow ceiling mounted cassette

FXSQ40M 2 S - Concealed ceiling mounted

FXSQ80M 3 S - Concealed ceiling mounted

KHRQ22M20T7 3 REFNET branch piping kit



DCS601A51 1 I controller

BRC1D517 8 Wired remote control

BYC125KJW1 4 Decoration panel

VRV Express


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Name Model Tmp C Rq TC

Av TC Rq SC Av SC Tmp

H Rq HC

Av HC

Airflow Soun

d MCA

WxHxD Wght

°C kW kW kW kW °C kW kW l/s dBA A mm kg

First Floor - Room 101 FXFQ50M 22.0 4.0 4.9 3.5 3.8 21.0 2.0 4.5 183-267 27-32 0.3 840x246x840 24




First Floor - Room 105 FXSQ80M 22.0 5.5 7.8 4.9 6.2 21.0 3.2 7.1 358-450 37-43 1.4 1400x300x800 51

First Floor - Room 106 FXSQ40M 22.0 3.0 3.9 2.5 2.9 21.0 2.0 3.5 150-192 32-38 0.6 700x300x800 30

Second Floor - Room 201 FXSQ40M 22.0 3.0 3.7 2.5 2.8 21.0 2.0 3.6 150-192 32-38 0.6 700x300x800 30

Second Floor - Room 203 FXSQ80M 22.0 6.0 7.5 5.2 6.0 21.0 4.5 7.2 358-450 37-43 1.4 1400x300x800 51

Second Floor -Room 204 FXSQ80M 22.0 6.0 7.5 5.2 6.0 21.0 4.5 7.2 358-450 37-43 1.4 1400x300x800 51

Second Floor - Room 205 FXAQ40M 22.0 3.0 3.7 2.5 2.9 21.0 1.8 3.6 150-200 34-39 0.4 1050x290x230 14

Indoor unit details

VRV Express


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VRV III “P” Series

Field Pipe work - Application


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REFNET headerREFNET headerREFNET jointREFNET joint

VRV refrigerant piping system is based on REFNETS

Advantages of REFNET system: Short dimensioning time

Short installation time

NEVER install a joint after a header !


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+30°

Joints are to be mounted …. Vertically

…..Horizontally

Refnet installation recommendations


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Adjust the pipe sizeaccording to the capacity

Possibly

match pipe and refnet

using adaptors

prototypes

REFNET piping system

Select refnets according to the capacity


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Refrigerant Pipe Work Maximum “Actual” Piping Limitations

165M90M

40M

For level differences above 50m;

• One size up of main liquid pipe

• Option kit

•Total piping length = 1000M•No Oil traps•No Liquid traps•No Solenoid valves•No Sight glasses•No Driers•No Additional oil•Max pressure test 38.5 bar

190MMax

EQUIVALENT LENGTH

15M

A

A

Can become 90 m in certain conditions


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Field Piping Limitations VRV III P series (Heat pump Inverter)

FXHQ….M FXCQ….M FXCQ….M FXSQ….M FXAQ….M

FXLQ….M FXLQ….M FXLQ….M

RXYQ…P

15m

165m

90m

40m

NEVERINSTALL A

JOINT AFTERA HEADER

edcb

a

lh j kf g n

m

1. “Longest” – “shortest” branch = b+c+d+e+l-f <=40m

2. f, g,h, j, k, l, m, n <= 40m

3. Pipes b, c, d, e between first and last kit are sized up

4. For the total piping calculation the actual length of b, c, d, e is counted double

90m

Can

be

if


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VRVII “M” Series Field Piping Limitations (Heat Recovery)

FXHQ….M FXCQ….M FXCQ….M FXSQ….M

REYQ….M

50m

150m

FXLQ….MFXLQ….MFXLQ….M

15m

FXLQ….M FXLQ….M

BSVQ. .M

40M

BSVQ. .M BSVQ. .M BSVQ. .M BSVQ. .M BSVQ. .M BSVQ. .M

BSVQ. .M

BSVQ. .M


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Piping joints required at the first branch

Refnet joints for 2 pipe Outdoor system type

KHRQ22M20T RX(Y)Q5

KHRQ22M29T9 RX(Y)Q8~10

KHRQ22M64T RX(Y)Q12~18 + RXYQ20~22

KHRQ22M75T RXYQ24~54

Refnet joints for 3 pipe Outdoor system type

KHRQ23M29T7 REQY8 – 10

KHRQ23M64T7 REYQ12 – 22

KHRQ23M75T7 REYQ24>

VRV III

VRV II H/R


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Piping Joints other than the first branch

Refnet joints for 2 pipe Connectable index

KHRQ22M20T <200

KHRQ22M29T9 200 - <290

KHRQ22M64T 290 - <640

KHRQ22M75T >640

Refnet joints for 3 pipe Connectable index

KHRQ23M20T7 <200

KHRQ23M29T7 200 - <290

KHRQ23M64T7 290 - <640

KHRQ23M75T7 640>

VRV III

VRV II H/R


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1st joint corresponds to outdoor unit

2nd Joint according to class total

Possibly, this results into a bigger joint than the 1st joint !

Selection of Piping Joints


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Refnet header for 2 pipe Connectable index

KHRQ22M29H <290

KHRQ22M64H 290 - <640

KHRQ22M75H 640>

Refnet header for 3 pipe Connectable index

KHRQ23M29H7 <200

KHRQ23M29H7 200 - <290

KHRQ23M64H7 290 - <640

KHRQ23M75H7 640>

PLEASE NOTE :

Class 250 CANNOT

be connected

to a header


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Pipe Size connections to the outdoor units Heat Pump model

Outdoor model Gas pipe Liquid pipe

RX(Y)Q5 15.9mm 9.5mm

RX(Y)Q8 19.1mm 9.5mm

RX(Y)Q10 22.2mm 9.5mm

RX(Y)Q12, 14, 16 28.6mm 12.7mm

RX(Y)Q18 +RXYQ20-22

28.6mm 15.9mm

RXYQ24 34.9mm 15.9mm

RXYQ26-34 34.9mm 19.1mm

RXYQ36-54 41.3mm 19.1mm


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Pipe Sizing between refnet branch kits for heat pump models

Total unit capacity

Gas

(outer diameter)

Liquid

(outer diameter)

<150 15.9mm 9.5mm

150-->200 19.1mm 9.5mm

200 - >290 22.2mm 9.5mm

290 - <420 28.6mm 12.7mm

420 - <640 28.6mm 15.9mm

640 - <920 34.9mm 19.1mm

>920 41.3mm 19.1mm

Piping

Adjust the pipe sizeaccording to the capacity

Possibly, this results into a bigger pipe than the one coming from the

outdoor unit !


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Learning, our wayRefrigerant pipe Size Connections to Indoor Units

Total indoor unit capacity Gas Liquid

20, 25, 32, 40, 50 12.7mm 6.4mm

63, 80, 100, 125 15.9mm 9.5mm

200 19.1mm 9.5mm

250 22.2mm 9.5mm

Please note: all the above connections are flared other than the gas pipe connection on the 200 an 250 models being brazed style

The pipe size ofthe indoor unit


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Pipe Sizing between refnet branch kits for Heat recovery

Total unit capacity Gas Discharge Liquid

<63 12.7mm 9.5mm 6.4mm

63 - <200 15.9mm 12.7mm 9.5mm

200 - <290 22.2mm 19.1mm 9.5mm

290 - <420 28.6mm 19.1mm 12.7mm

420 - <640 28.6mm 28.6mm 15.9mm

640 - <920 34.9mm 28.6mm 19.1mm

>920 41.3mm 28.6mm 19.1mm

Outdoor model Gas pipe Liquid pipe Discharge pipe

REYQ8 19.1mm 9.5mm 15.9mm

REYQ10 22.2mm 9.5mm 19.1mm

REYQ12 28.6mm 12.7mm 19.1mm

REYQ14, 16 28.6mm 12.7mm 22.2mm

Pipe Size connections to the outdoor units for Heat recovery


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Equivalent length = a reference for a pressure drop of an component in the pipe work = length of linear pipes + allowances for fittings

Branch selector box = 4m

Refnet header = 1m

Refnet joint = 0.5m

41.3mm 1 – 5/5 bend = 0.7m

34.9mm 1 – 3/8 bend = 0.66m

28.mm 1 – 1/8 bend = 0.5m

22.2mm 7/8 bend = 0.4m

19.1mm 3/4 bend = 0.25m

12.7mm 1/2 bend = 0.22m

9.5mm 3/8 bend = 0.18m

The following allowances should be allocated to the following components:

=(Equivalent length of main pipe work x 0.5) + Equivalent length of branch pipe work

Overall Equivalent length =


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Increase only gas forIncrease only gas for

RX(Y)Q5P7RX(Y)Q5P7

Increase only liquid forIncrease only liquid for

RXYQ12,14,24, 36~54 PRXYQ12,14,24, 36~54 P

REYQ : REYQ : The WHOLE RANGEThe WHOLE RANGE

Increase diameter of the Liquid

AND the Gas pipes between

the condenser and the first refnet

What happens when the overall equivalent length from the condensing unit to any indoor unit exceeds 90 m ?


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Equivalent length 80m

E. Length 40m

Section to be increased in size

Equivalent length 110m

E. Length 40m

Section to be increased in size

(110m x 0.5)Overall Equivalent length = + = 95m 40m(An increase in main pipe work size is required)

(80m x 0.5)Overall Equivalent length = + = 80m 40m (No increase in pipe size required)

Equivalent length: example of calculation


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Piping Between modules forming a Condensing unitHeat pump (P7 series)

To indoor units

= Liquid Line= Gas Line

No oil equalization line required for P7 models


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To indoor units

= ¼” (6.4mm) Oil Equalising Line (only for REYQ18 or more)= Liquid Line= Gas Line= Discharge Line

Piping Between modules forming a Condensing unitHeat recovery (M series)


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AB

C

A

B

C

Branch Maximum pipe length

10m (13 m equiv.) or less



Pipe limitations between modules forming a Condensing unit


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Heat pump branch kit

Two unit connection kit BHFQ22P1007

Three unit connection kit BHFQ22M1517

Heat recovery branch kit

Two unit connection kit KHFQ23M907

Three unit connection kit BHFQ23M1357

Pipe Sizing Between Outdoor Units


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Pipe Sizing Between Outdoor Units VRVIII

~ 54


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Pipe Sizing Between Outdoor Units VRVII H/R


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TOTAL 22.2 = x 0.37 = +

TOTAL 19.1 = x 0.26 =+

TOTAL 15.9 = x 0.18 = +TOTAL 12.7 = x 0.12 = +TOTAL 9.5 = x 0.059 = +TOTAL 6.4 = x 0.022 =

Additional Refrigerant Charge Calculation for VRVIII takes in consideration the total lengths of liquid piping (m)

= R (additional kg R410)

R should be rounded off in units of 0,1 kg


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TOTAL 22.2 = x 0.35 = +

TOTAL 19.1 = x 0.25 =+

TOTAL 15.9 = x 0.17 = +TOTAL 12.7 = x 0.11 = +TOTAL 9.5 = x 0.054 = +TOTAL 6.4 = x 0.022 =

Additional Refrigerant Charge Calculation for VRVII H/R takes in consideration the total lengths of liquid piping (m)

x 1.15

0 kg (8-16 HP)

3 kg (18-32 HP)

6 kg (34-48 HP)

R=


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Learning, our wayField Pipe sizing & Additional “Refrigerant” Charging

R_____ M

15m

4032 25 4080 40

40 40 40

C D E

M N O

SR T

4 I 4

P Q

B

VU X YW

Z

AABCDE

F

SUCTION DISCHARGE LIQUID

L

MNOPQ

RS

SUCTION LIQUID

U

WV

G

H

XY

Z

G

1

K

L

I

JK

T

1 2 3 4 5

6

12 3

45

6

BRANCHSELECTOR BOX JOINT HEADER

ADDITIONAL REFRIGERANT CHARGE CALCULATION

TOTAL 12.7 = X 0.11 = + TOTAL 9.5 = X 0.054 = + TOTAL 6.4 = X 0.022 =

A

F

1

1

K

1 1 6 1

6

H

6 J

2

T

2

L

15 5

10 10 6

2

6

No additional oil required!

Example of centralizing table


section


Learning, our way

Minimum thickness

Size t(mm)

ø O 0,80

ø O 0,80

ø12,7 O 0,8

ø15,9 O 0,99

ø19,1 1/2H 0,80

ø28,6 1/2H 0,99

ø34,9 1/2H 1,21

ø41,3 1/2H 1,43

R-410Amaterial

ø22,2 1/2H 0,80

“The material, wall thickness,tensile strength, ductility,

corrosion resistance, formingand testing methods shall be

suitable for the refrigerantused and withstand the

pressure and stresses whichmay occur”

The same requirements are validfor refnet headers and joints

The maximum working pressure for R-410A VRV P-series is 38 bar

O : Annealed½ H: Half HardFor half hard pipes the maximum allowed tensile stress is 61N/mm² for this reason, the 0.2% proof strength of the half hard pipe shall beminimum 61N/mm²The bending radius is more or equal to 3 times the diameter of the pipe

C1220-

Piping material

daikin europe, consulting sales section learning, our way vrv iii product selection piping selection

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