Bosch CLIMATE 5000 VRF RDCI, RDCI10/28-3, RDCI8/25-3, RDCI12/33-3, RDCI16/45-3 Installation Manual

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Before using your air conditioner unit, please read this manual carefully and keep it for future reference.

6 720 862 437 (2016/10)

Installation manual

CLIMATE 5000 VRF

RDCI Series – All DC Inver ter Outdoor Units

RDCI8/25-3, RDCI10/28-3, RDCI12/33-3, RDCI14/40-3, RDCI16/45-3

6 720 862 437 (2016/10)

RDCI Series – All DC Inverter Outdoor Units

2 | PRECAUTIONS

1. PRECAUTIONS

Read all installation manuals prior to installation.

■ This Installation manual is for the outdoor unit.

■ When installing indoor units please refer to indoor unit installation manual.

■ Prior to installation of this unit, please ensure correct power supply is available. Only qualiﬁed personal to undertake these works.

■ When installing a heat recovery switch box, ensure you consult the switch box manual.

The safty precautions listed here are divided into two categories. Ensure you read both categories prior to installation.

WARNING

Failure to observe a warning may result in serious injury.

CAUTION

Failure to observe a caution may result in injury or damage to the equipment.

After completing the installation, ensure the unit operates properly during the start-up operation. Please instruct the customer on how to operate the unit and keep it maintained. Also, inform customers that they should store this installation manual along with the owner‘s manual for future reference.

WARNING

■ Only trained and qualiﬁed service personnel to install, repair or service the equipment as per the service and installation manual.

Improper installation, repair, and maintenance may result in electric shocks, short-circuit, leaks, ﬁre or other damage to the equipment.

■ When installing the unit in a room, ensure you meet the requirement of national regulations.

Excessive refrigerant in a closed environment can lead to oxygen deﬁciency.

■ Only use authorised accessories and parts are to be used, failure to do so may invalidate your warranty.

■ If required consult a structural engineer for advice on suitable installation and load bearing area.

■ The appliance must not be installed in a laundry room.

■ Before obtaining access to electrical terminals, all power supply circuits must be safely isolated.

■ The condenser must have a local isolation within accordance of UK wiring regulations.

■ The enclosure of the appliance shall be marked by word, or by symbols, with the direction of the refrigerant ﬂow.

■ All electrical work must comply with the local national wiring regulations and the instructions set out in this manual.

If National regulations are not followed this may cause injur y, damage or ﬁre to property.

■ When installing refrigerant pipework, ensure all pipes are protected to avoid any unwanted particles entering.

■ If the refrigerant leaks during installation, ventilate the area immediately.

Toxic gas may be produced should refrigerant comes into contact with a naked ﬂame.

CAUTION

■ When installing this unit ensure you check installation guidelines to meet the requirements.

■ Ensure correct earthing of all appliances as per national electrical guidelines.

■ The unit should only be operated by authorised personnel.

■ Do not install the air conditioning unit in the following locations:

• Where ﬂammable gases, liquids or materials are stored.

• Where there is salty air surrounding (near the coast).

• Where there is caustic gas (sulﬁde, for example) existing in the air.

• Where electrical voltage ﬂuctuates.

• Where there is strong electromagnetic waves exist.

• Where there is acid or alkaline liquid evaporating.

2. INSTALLATION CHECKS

■ Acceptance and Unpacking

• Before accepting delivery, ensure you check all of the equipment for damage. If damage is found please contact your supplier.

• Check whether the model, speciﬁcation and quantity of the equipment conform what has been ordered.

• After removing the outer packaging, please keep the operation instructions safe and count the accessories.

■ Refrigerant pipework

• Prior to installation, check the correct model numbers have been delivered.

• Project schematic must be consulted for all refrigerant pipe sizes and correct diameters.

• The refrigerant pipework should be sufﬁciently insulated. This will prevent condensation occurring.

• After installation of the pipework is complete, ensure a full strength/ tightness test and vacuum test has performed.

■ Strength/tightness test The new refrigerant pipework must undergo a strength test (with 40kgf/cm

nitrogen). For tightness testing, please refer to F Gas

Regulations.

■ Creating a vacuum Ensure you vacuum the system down to 1.5 Torr, to ensure all moisture is extracted.

CONTENTS PAGE

1. PRECAUTIONS .................................................................... 2

2. INSTALLATION CHECKS ....................................................... 2

3. ACCESSORIES .................................................................... 3

4. OUTDOOR UNIT INSTALLATION ............................................ 3

5. REFRIGERANT PIPE ............................................................. 8

6. CONNECTING PIPES TO SBOX ............................................ 13

7. SBOX WIRING NAMEPLATE ................................................ 14

8. ELECTRIC WIRING ............................................................. 15

9. TEST RUN ......................................................................... 21

RDCI Series – All DC Inverter Outdoor Units

6 720 862 437 (2016/10)

ACCESSORIES | 3

■ Refrigerant replenishment

• Additional refrigerant must be added prior to turning the units on. Correct refrigerant charge must be calculated using the guidelines within this manual.

• On completion of the refrigerant installation you must record the exact additional refrigerant charge.

■ Electric wiring

• When selecting the size of the power supply cable, consult this manual along with national regulations. When selecting communication wiring follow guidelines set out in this manual.

• When installing communication cabling, ensure you read electrical installation guideline in this manual.

■ Test Run

• Before operation, remove the six pieces of PE foaming which are used at the rear of the unit for protecting the condenser. Be careful not to damage the ﬁns. Otherwise, the heat exchange performance may be affected.

• Prior to test run, ensure the power has been on for a minimum of 12 hours.

3. ACCESSORIES

Table.3-1

Model

Name

All of units Outline Function

Outdoor unit

installation manual

___________

Outdoor unit owner’s

manual

Upon completion leave with customer

Indoor unit owner’s

manual

On completion leave with customer

90° elbow

1 (8HP, 10HP)

2 (12HP～

16HP)

________ For connecting pipes

Seal plug 8 ________ For pipe cleaning

Connective pipe

accessory

(used in 8HP～16HP)

Connect to the high-pressrue gas balance side

Connective pipe

accessory

(used in 8HP～16HP)

Connect to the liquid pipe side

Connective pipe

accessory

(used in 8HP, 10HP, 12HP)

Connect to the highpressure gas pipe side

Connective pipe

accessory

(used in 14HP, 16HP)

Connect to the highpressure gas pipe side

Connective pipe

accessory

(used in 12HP)

Connect to the low-pressure gas pipe or liquid pipe side

Screw bag 1 ________ Stored for service

Cable clip kit

(Optional)

For cable fastening

4. OUTDOOR UNIT INSTALLATION

4.1 Outdoor unit combination

Table.4-1

HP Mode

Max Qty. of indoor

unit

HP Mode

Max Qty. of indoor

unit

8 8HP×1 13 26 10HP+16HP 43 10 10HP×1 16 28 14HP×2 46 12 12HP×1 20 30 14HP+16HP 50 14 14HP×1 23 32 16HP+16HP 53 16 16HP×1 26 34 10HP×2+14HP 56 18 8HP+10HP 29 36 10HP×2+16HP 59 20 10HP+10HP 33 38

10HP+12HP+16HP

22 10HP+12HP 36 40

10HP+14HP+16HP

24 10HP+14HP 39 42 14HP×3 64

Table.4-2

HP Mode

Max Qty. of indoor

unit

HP Mode

Max Qty. of indoor

unit

44 14HP×2+16HP 64 56

10HP+14HP+16HP×2

46 14HP+16HP×2 64 58 14HP×3+16HP 64 48 16HP×3 64 60 14HP×2+16HP×2 64 50

8HP+10HP+16HP×2

64 62 14HP+16HP×3 64

10HP×2+16HP×2

64 64 16HP×4 64

10HP+12HP+16HP×2

4.2 Dimensions of outdoor unit

4.3 Selecting installation location

■ Ensure that the outdoor unit is installed in a well-ventilated location.

■ Ensure that the noise and exhaust ventilation of the outdoor unit does not affect the neighbours of the property owner or its surroundings.

■ Where possible ensure the shortest pipe route.

■ Ensure that the outdoor unit is installed in a cool location without direct sunshine exposure or direct radiation.

Fig. 4-1

Unit: mm

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RDCI Series – All DC Inverter Outdoor Units

4 | OUTDOOR UNIT INSTALLATION

■ Do not install the outdoor unit in a dirty or severely polluted location, to avoid blockages in the heat exchanger of the outdoor unit.

■ Do not install the outdoor unit in a location with oil pollution, high salt content air or high content of harmful gases such as sulfurous gas.

4.4 Base for outdoor unit

■ Base types

• Steel structure base

• Ensure you consult a construction engineer before installation. Ensure the base has been installed to the correct dimensions set out in this manual. Raise the unit at least 200mm from the ﬂoor.

■ Position illustration of screw bolt (Unit: mm)

Table.4-3 Unit: mm

SIZE

8～16

A 1120

B 1250

C 736

D 765

■ Centering position illustration for each connective pipe (Unit: mm)

1) 8HP, 10HP

2) 12HP

Ø10 Expansion bolt

Rubber shocking proof mat

Concrete base h=200mm

Solid ground or rooﬁng

200 mm

Fig. 4-2

B A

15×23long U-shape hole

Fig. 4-3

Fig. 4-4

250

205

245

290

230

205

200

170

Fig. 4-5

High-pressure

gas balance valve

Low-pressure gas

side of shut-off valve

High-pr

essure gas

side of shut-off valve

iquid side of

shut-off valve

Oil balance valve

R ampliﬁcation

The connective pipe

diameter Ø19.1

The connective pipe

diameter Ø22.2

The connective pipe

diameter Ø19.1

The connective pipe

diameter Ø12.7

For the Cascaded Units

Fig. 4-6

RDCI Series – All DC Inverter Outdoor Units

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OUTDOOR UNIT INSTALLATION | 5

3) 14HP, 16HP

4.5 Outdoor Unit Cascade Sequence

A system with one or more outdoor units installed, will need to follow this method: Outdoor units should be placed from large capacity to small capacity. The largest should be installed nearest to the ﬁrst branch joint. You need to set the largest capacity as the master unit.

1) Place the 16HP at a side of the ﬁrst branch joint site.

2) Place the unit from the large capacity to the small (See the detail placement illustration)

3) Set 16HP as the main unit, while the 12HP and the 10HP as the slave unit.

4.6 Installation space for outdoor unit

■ When installing the unit, leave a space for maintenance shown in Fig.4-12 Install the power supply at the side of the outdoor unit. For correct installation procedure, read installation manual.

■ In case there are obstacles surrounding the unit, refer to 4-17.

4.7 Layout

■ When the outdoor unit is higher than the surrounding obstacle

• One row

250

205

245

290

230

205

200

170

Fig. 4-7

High-pressure

gas balance valve

ow-pressure gas

side shut-off valve

High-pr

essure gas

side shut-off valve

iquid side

shut-off valve

Oil balance valve

R ampliﬁcation

The connective pipe

diameter Ø19.1

The connective pipe

diameter Ø25.4

The connective pipe

diameter Ø19.1

The connective pipe

diameter Ø15.9

For the Cascaded Units

Fig. 4-8

250

205

245

290

230

205

200

165

Fig. 4-9

High-pressure

gas balance valve

ow-pressure gas

side shut-off valve

High-pr

essure gas

side shut-off valve

iquid side

shut-off valve

Oil balance v

alve

R ampliﬁcation

The connective pipe

diameter Ø19.1

The connective pipe

diameter Ø28.6

The connectiv

e pipe

diameter Ø22.2

The connective pipe

diameter Ø15.9

or the Cascaded Units

Fig. 4-10

Outdoor unit

(38HP)

16HP

The 1st branch joint

12HP 10HP

SBOX SBOX SBOX

Indoor unit A Indoor unit B Indoor unit C

Fig. 4-12

100mm~500mm 100mm~500mm

>1000mm

Top view of the outdoor unit

Fig. 4-13

Front

100-500mm

Front

>1m

>1m>1m

>800mm

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RDCI Series – All DC Inverter Outdoor Units

6 | OUTDOOR UNIT INSTALLATION

• Two rows

• More than two rows

■ If the minimum clearance of 800mm above the unit can not be met, see the ﬁgure below.

■ Ensure the surroundings are no more than 800mm high. If this is not possible install mechanic exhaust device.

4.8 Set the snow-proof facility

■ In snowy areas, precautions should be taken to avoid unit failure or lack of performance.

4.9 Explanation of valve

Table.4-4

Low-pressure gas pipe

Oil balance pipe

High-pressure gas balance pipe

Liquid pipe

High-pressure gas pipe

■ Installation illustration

Fig. 4-14

Front

100-500mm

Front

Front Front

>1m

>800mm

Fig. 4-15

Front

100-500mm

Front Front

Front

>1m

>800mm

>1m>1m>1m

Fig. 4-16

Front

100-500mm

Front

>1m

>1m>1m

Fig. 4-17

Front view

Side view

Front view

>45° >300mm

>1000mm Airﬂow deﬂector

Fig. 4-19

Notes: 16HP as an example

1210

725

001

Fig. 4-20

Fig. 4-21

Example A

Support

Radius

Air outlet louver dimension (optional)

RDCI Series – All DC Inverter Outdoor Units

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OUTDOOR UNIT INSTALLATION | 7

■ Curve diagram of static pressure, air ﬂow volume.

Table.4-5 Unit: mm Table.4-6 Unit: mm

A A≥300 A A≥300 B B≥250 B B≥250 C C≤3000 C C≤3000 D 750≤D≤760

θ≤15°

NOTE

■ Before installing the air deﬂector, please ensure the fan grill has been taken off.

■ Once air deﬂector has been installed, the air volume, cooling/ heating capacity will decrease. The maximum angle allowed for the shutter is 15 degrees.

■ Only one bend set is allowed.

■ Install anti vibration pads in between the unit and air deﬂector.

Fig. 4-22

12 ST3.9 self-threading screws

Remove the fan grills

12-Ø3.2

393

567

1250

411 411213

Fig. 4-23

9500

10000

10500

11000

11500

12000

12500

0 5 10 15 20 25

Fig. 4-24

8/10HP

Air pressure curve diagram

(Remove the fan grills)

Air volume (m

/h)

Static pressure (Pa)

10500

11000

11500

12000

12500

13000

13500

0 5 10 15 20 25

Fig. 4-25

12HP

Air pressure curve diagram

(Remove the fan grills)

Air volume (m

/h)

Static pressure (Pa)

12500

13000

13500

14000

14500

15000

15500

0 5 10 15 20 25

Fig. 4-26

14/16HP

Air pressure curve diagram

(Remove the fan grills)

Air volume (m

/h)

Static pressure (Pa)

0921

1210

Fig. 4-27

Example B

Support

Radius

Air outlet louver dimension (optional)

725

Ø3.2

393

567

1250

411 411

213

411 411213

Fig. 4-28

Fig. 4-29

12 ST3.9 self-threading screws

Remove the fan grills

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RDCI Series – All DC Inverter Outdoor Units

8 | REFRIGERANT PIPE

5. REFRIGERANT PIPE

5.1 Length and drop height permitted for the refrigerant pipework

Note: Ensure a distance of at least 0.5m between branch pipes.

Table.5-1

Permitted

value

Pipework

Pipe length

Total pipe length (Actual)

1000m

(Please refer to

the caution 5 of

conditions 2)

L1+(L2+L3+L4+L5+L6+L7 +L8+L9+L10+L11+L12+ L13)×2+a+b+c+d+e+f+g+ h+i+j+k+l+m+n

Maximum

pipework (L)

Actual length

175m

L1+L7+L9+L11+j+k+n

Equivalent

length

200m

(Please refer to

caution 1)

Pipework (furthest from the ﬁrst line pipe branch)

equivalent length

40m/90m

(Please refer to

caution 5)

L7+L9+L11+j+k+n

SBOX to indoor unit

equivalent length

40m j+k+n

Drop height

Indoor unit

to outdoor

unit drop

height

outdoor

unit up

70m*

(Please refer to caution 3)

outdoor unit

down

110m

(Please refer to caution 4)

Indoor unit to indoor unit

drop height

30m _____________

(140)

(71)

(56)

(28)

(71)

(28)

(71)

N10 (56)

Ⅱ

Ⅳ

Ⅲ

Ⅰ

m n

L13

L11

L10

L12

SB1

SB2

SB3

SB4

SB5

SB6

N11

(140)

N12

(140)

N13 (56)

SB7

Fig. 5-1

Indoor unit

The ﬁrst line branch pipe

Maximum height between outdoor and indoor units

unit and outdoor unit H≤110m

Maximum height from indoor unit to indoor unit.

drop height H≤30m

Outdoor unit

(one or more outdoor units)

Max pipework equivalent length L≤200m

(From the ﬁrst line branch pipe) Maximum pipework equivalent length L≤40m/90m

SBOX to indoor unit equivalent length L≤40m

* A system with a height difference above 70m is not supported as standard but is available on request for customisation.

Fig. 5-2

≥300m

RDCI Series – All DC Inverter Outdoor Units

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REFRIGERANT PIPE | 9

CAUTION

1. The length between the branch pipes should be a minimum of 0.5m.

2. When the outdoor unit is installed above the indoor units and the distance

is greater than 20m, you must install oil return taps every 10m. Refer to 5-2.

3. When the outdoor unit is installed below the internal units and the length

exceeds 40m, the liquid pipe needs to be increased one size.

4. When the outdoor unit is installed below the internal units, the ﬁrst

branch joint connection should be shorter than 40m. However when certain conditions are met, the length can increase up to 90m.

Conditions

1. For all pipe sizing and limitations please follow the conditions below.

Conditions

■ L7+L9+L11+j+k+n≤90m L2～L13 Increasing the pipe diameter of the distribution pipe

■ To increase the pipe size, see below

Ø9.5 → Ø12.7 Ø12.7 → Ø15.9 Ø15.9 → Ø19.1 Ø19.1 → Ø22.2 Ø22.2 → Ø25.4 Ø25.4 → Ø28.6 Ø28.6 → Ø31.8 Ø31.8 → Ø38.1 Ø38.1 → Ø41.3 Ø41.3 → Ø44.5 Ø44.5 → Ø54.0

5.2 Select the refrigerant pipework type

Conditions

2. When calculating actual length of pipe, follow the example below. L1+(L2+L3+L4+L5+L6+L7+L8+L9+L10+L11+L12+L13) x2+a+b+c +d+e+f+g+h+i+j+k+l+m+n<1000m

Examples

Reference Figure. 5-1

Conditions

3. The length from the indoor unit to the nearest branch joint assembly or SBOX ≤40m; b, c, d, e, f, h, i, l, m, n, p, q, r ≤40m(Pipe diameter requirements, please refers to table.5-8).

Examples

Reference Figure. 5-1

Conditions

4. The distance between [the outdoor unit to the furthest indoor unit] and [the outdoor unit to the nearest indoor unit] is ≤40m.

The furthest indoor unit N10

The nearest indoor unit N11 (L1+L7+L9+L11 +j+k+n)-(L1 +L7+L8+p) <40m

Examples

Reference Figure. 5-1

j j j j j j

g2 g3

(140)

(71)

(56)

(28)

(71)

(28)

(71)

N10 (56)

Ⅱ

Ⅳ

Ⅲ

Ⅰ

N11

(140)

N12

(140)

N13 (56)

m n

L9L8

L13

L11

L10

L12

SB1

SB2

SB3

SB4

SB5

SB6

SB7

W3 (10)W2(12)W1(16)

Fig. 5-3

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RDCI Series – All DC Inverter Outdoor Units

10 | REFRIGERANT PIPE

Table.5-2

Pipe name

Code (As per

the Fig. 5-2)

Main pipe L1

Indoor unit main pipe L2~L13

Indoor unit aux. pipe a, b, ...r

Indoor unit main pipe branching pipe assembly A, B, C, D, E

Indoor unit aux. pipe branching pipe assembly I, II, III, IV

Outdoor unit branching pipe assembly L, M

Outdoor unit connective pipe g1, g2, g3, G1

SBOX equipment SB1, ...SB7

5.3 Size of joint pipes for indoor unit

Table.5-3 Size of joint pipes for R410A indoor unit

Capacity of

indoor unit A

(×100W)

Indoor unit main pipe (inches)

Low-pressure

gas side

High-pressure

gas side

Liquid

side

Available

branching pipe

A<56 Ø12.7 Ø9.5 Ø6.4 IDU-BJR01

56≤A<166 Ø19.1 Ø15.9 Ø9.5 IDU-BJR01

166≤A<230 Ø22.2 Ø19.1 Ø9.5 IDU-BJR02

230≤A<330 Ø22.2 Ø19.1 Ø12.7 IDU-BJR02

330≤A<460 Ø28.6 Ø22.2 Ø12.7 IDU-BJR03

460≤A<660 Ø28.6 Ø22.2 Ø15.9 IDU-BJR03

660≤A<920 Ø34.9 Ø28.6 Ø19.1 IDU-BJR04

920≤A<1350 Ø41.3 Ø34.9 Ø19.1 IDU-BJR05

1350≤A Ø44.5 Ø38.1 Ø22.2 IDU-BJR05

e.x.1: Refer to Fig.5-2, the capacity of downstream units to L2 is 71×2+140+28=310, i.e. low pressure gas pipe for L2 is Ø22.2, high pressure gas pipe is Ø19.1, high pressure liquid pipe is Ø12.7.

5.4 Size of joint pipes for outdoor unit

Based on the following tables, select the diameters of outdoor unit main connective pipe. When the main pipe accessory is larger on the indoor unit, use the larger pipe accessory.

Table.5-4 Size of joint pipes for R410A outdoor unit

Model

When the equivalent length of all liquid

pipes < 90m, the size of main pipe (inches)

Low-pressure

gas side

High-pressure

gas side

Liquid

side

The 1st

branching pipe for

indoor unit

8HP Ø22.2 Ø19.1 Ø9.5

IDU-BJR02

10HP Ø22.2 Ø19.1 Ø12.7

IDU-BJR02

12HP Ø25.4 Ø19.1 Ø12.7

IDU-BJR03

14~16HP Ø28.6 Ø22.2 Ø15.9

IDU-BJR03

18~22HP Ø31.8 Ø28.6 Ø15.9

IDU-BJR03

24HP Ø34.9 Ø28.6 Ø15.9

IDU-BJR04

26~32HP Ø34.9 Ø28.6 Ø19.1

IDU-BJR04

34~48HP Ø41.3 Ø34.9 Ø19.1

IDU-BJR05

50~64HP Ø44.5 Ø38.1 Ø22.2

IDU-BJR05

Table.5-5 Size of joint pipes for outdoor unit (R410a)

Model

When the equivalent length of all liquid

pipes ≥ 90m, the size of main pipe (inches)

Low-pressure

gas side

High-pressure

gas side

Liquid

side

The 1st

branching pipe for

indoor unit

8HP Ø22.2 Ø19.1 Ø12.7

IDU-BJR02

10HP Ø22.2 Ø19.1 Ø12.7

IDU-BJR02

12HP Ø25.4 Ø19.1 Ø15.9

IDU-BJR03

14~16HP Ø28.6 Ø22.2 Ø15.9

IDU-BJR03

18~22HP Ø31.8 Ø28.6 Ø19.1

IDU-BJR03

24HP Ø34.9 Ø28.6 Ø19.1

IDU-BJR04

26~32HP Ø34.9 Ø28.6 Ø22.2

IDU-BJR04

34~48HP Ø41.3 Ø34.9 Ø22.2

IDU-BJR05

50~64HP Ø44.5 Ø38.1 Ø25.4

IDU-BJR05

5.5 Branch pipes for outdoor unit

Table.5-6

Model

Outdoor unit pipe connective opening dimension (inches)

Low-pressure gas

side

High-pressure gas

side

Liquid side

8~12HP Ø22.2 Ø19.1 Ø12.7

14, 16HP Ø28.6 Ø22.2 Ø15.9

5.6 Multi pipe connection assembly and pipe diameter for outdoor unit

Based on Table 5-7 select the branch pipe assembly for the outdoor unit. Before installation, please read the Outdoor Unit Branching Pipe Installation Manual carefully.

Table.5 -7 Outdoor unit branch pipe assembly (Illustration)

Outdoor unit Qty.

Illustration

Outdoor unit

connective pipe

diameter

Parallel connect with

the branching pipes

2 units

g1g2

g1, g2: 8~12HP: Ø22.2/Ø19.1/Ø12.7 14, 16HP: Ø28.6/Ø22.2/Ø15.9

L: ODU-BJR02

3 units

g1g2

g1, g2, g3: 8~12HP: Ø22.2/Ø19.1/Ø12.7 14, 16HP: Ø28.6/Ø22.2/Ø15.9 G1: Ø34.9/Ø28.6/ Ø19.1

L+M: ODU-BJR03

4 units

g1g2

G1 G2

g3g4

g1, g2, g3, g4: 8~12HP: Ø28.2/Ø19.1/Ø12.7 14, 16HP: Ø28.6/Ø22.2/Ø15.9 G1: Ø34.9/Ø28.6/Ø19.1 G2: Ø41.3/Ø34.9/Ø22.2

L+M+N: ODU-BJR04

5.7 Example

1) Take (10+12+16) HP for the three modules as an example to clarify the

pipe selection.

2) Take Fig.5-2 as an example, providing that the equivalent length of all

pipes in this system is larger than 90m.

Table.5-8

Capacity

of indoor unit A

(×100W)

Indoor unit aux. pipe (between branch joint and branch

joint/SB) (inches)

The branch pipe assembly of indoor

unit aux. pipe

Gas side Liquid side

A<160 Ø15.9 Ø9.5 IDU-BJR01

Capacity

of indoor unit A

(×100W)

Indoor unit aux. pipe (between indoor unit and branch joint/SB) (inches)

When branching

pipe’s length ≤10m

When branching pipe’s length>10m

Gas side Liquid side Gas side Liquid side

A<56 Ø12.7 Ø6.4 Ø15.9 Ø9.5

160≥A≥56 Ø15.9 Ø9.5 Ø19.1 Ø12.7

Main pipe

RDCI Series – All DC Inverter Outdoor Units

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REFRIGERANT PIPE | 11

A Branching pipe at the inside of the unit.

There are b, c, d, e, f, h, i, l, m, n, p, q, r branching pipes at the inside of the unit, the branching pipe diameter should be select as per Table 5-8.

B Main pipe and aux. pipe at the inside of the unit (Refer to Table 5-3

and Table 5-8)

1) The aux. pipe a with N1, N2 downstream indoor units that total capacity is 71×2=142, the pipe a diameter is Ø15.9/Ø9.5, thus select IDU-BJR01 for the branching pipe I.

2) The main pipe L3 with N1, N2 downstream indoor units that total capacity is 71×2=142, the pipe L3 diameter is Ø19.1/Ø15.9/Ø9.5, thus select SBOX02-1 for SB1.

3) The main pipe L5 with N3 downstream indoor units that total capacity is 140, the pipe L5 diameter is Ø19.1/Ø15.9/Ø9.5, thus select SBOX02-1 for SB2.

4) The main pipe L6 with N4 downstream indoor units that total capacity is 28, the pipe L6 diameter is Ø12.7/Ø9.5/Ø6.4, thus select SBOX02-1 for SB3.

5) The main pipe L4 with N3, N4 downstream indoor units that total capacity is 140+28=168, the pipe L4 diameter is Ø22.2/Ø19.1/ Ø9.5, thus select IDU-BJR02 for the branching pipe C.

6) The main pipe L2 with N1~N4 downstream indoor units that total capacity is 71×2+140+28=310, the pipe L2 diameter is Ø22.2/ Ø19.1/Ø12.7, thus select IDU-BJR02 for the branching pipe B.

7) The main pipe L12 with N5 downstream indoor units that total capacity is 140, the pipe L12 diameter is Ø19.1/Ø15.9/Ø9.5, thus select SBOX02-1 for SB4.

8) The aux. pipe g with N6, N7 downstream indoor units that total capacity is 71×2=142, the pipe g diameter is Ø15.9/Ø9.5, thus select IDU-BJR01 for the branching pipe II.

9) The main pipe L13 with N6, N7 downstream indoor units that total capacity is 71×2=142, the pipe L13 diameter is Ø19.1/Ø15.9/ Ø9.5, thus select SBOX02-1 for SB5.

10) The main pipe L10 with N5~N7 downstream indoor units that total capacity is 140+71×2=282, the pipe L10 diameter is Ø22.2/ Ø19.1/Ø12.7, thus select IDU-BJR02 for the branching pipe F.

11) The aux. pipe k with N9, N10 downstream indoor units that total capacity is 56×2=112, the pipe k diameter is Ø15.9/Ø9.5, thus select IDU-BJR01 for the branching pipe III.

12) The aux. pipe j with N8~N10 downstream indoor units that total capacity is 28+56×2=140, the pipe j diameter is Ø15.9/Ø9.5, thus select IDU-BJR01 for the branching pipe IV.

13) The main pipe L11 with N8~N10 downstream indoor units that total capacity is 28+56×2=140, the pipe L11 diameter is Ø19.1/Ø15.9/ Ø9.5, thus select SBOX02-1 for SB6.

14) The main pipe L9 with N5~N10 downstream indoor units that total capacity is 140+56×2+71×2+28=422, the pipe L9 diameter is Ø28.6/Ø22.2/Ø12.7, thus select IDU-BJR03 for the branching pipe E.

15) The main pipe L8 with N11~N13 downstream indoor units that total capacity is 140×2+56=336, the pipe L8 diameter is Ø28.6/Ø22.2/ Ø12.7, thus select SBOX04-1 for SB7.

16) The main pipe L7 with N5~N13 downstream indoor units that total capacity is 140×3+71×2+56×3+28=758, the pipe L7 diameter is Ø34.9/Ø28.6/Ø19.1, thus select IDU-BJR04 for the branching pipe D.

17) The main pipe L1 with N1~N10 downstream indoor units that total capacity is 140×4+71×4+56×3+28×2=1064, thus select IDUBJR05 for the branching pipe A.

C Main pipe (Refer to Table 5-3, Table 5-5):

Main pipe L1 in the Fig.5-2, which upstream outdoor units total capacity is 16+12+10=38, base on table 5-5, the low pressure gas/high pressure gas/liquid pipe diameter are Ø41.3/ Ø34.9/Ø22.2, total capacity of the downstream indoor unit is

140×4+71×4+56×3+28×2=1064, base on table 5-3, the low pressure gas/high pressure gas/liquid pipe diameter are Ø41.3/ Ø34.9/Ø19.1, take the large one for your selection, ﬁnal conﬁrm the main pipe diameter is: low pressure gas/high pressure gas/liquid pipe Ø41.3/Ø34.9/Ø22.2.

D Parallel connect the outdoor units

1) The outdoor unit linked by Pipe g1 is 10HP, parallel connects with outdoor unit. the connective pipe diameter to be selected according to its connector size is Ø22.2/Ø19.1/Ø12.7; The outdoor unit linked by Pipe g2 is 12HP, parallel connects with outdoor unit. the connective pipe diameter to be selected according to its connector size is Ø22.2/Ø19.1/Ø12.7; The outdoor unit linked by Pipe g3 is 16HP, parallel connects with outdoor unit. the connective pipe diameter to be selected according to its connector size is Ø28.6/Ø22.2/Ø15.9.

2) G1 is the upstream of the two parallel connected outdoor units, refer to Table 5-5 select the two parallel connected outdoor unit, the pipe diameter is Ø34.9/Ø28.6/Ø19.1.

3) Parallel connect the three outdoor units, refer to Table 5-7 should select ODU-BJR03 for outdoor unit connective pipes (L+M).

5.8 Caution for brazing

■ When brazing use nitrogen to pass through the pipework. This helps stop oxidisation inside the refrigerant pipework.

■ Do not use anti-oxidants when brazing the pipe joints. Residue can block pipes and cause damage to the equipment.

■ Do not use ﬂux when brazing. Use phosphor copper brazing ﬁller alloy (BCuP) which does not require ﬂux.

■ Flux is extremely harmful on refrigerant systems. This can cause corrosion and deterioration of the refrigerant oil.

5.9 Removing the contaminants in the pipework

■ Ensure there is no dirt or water in the pipework before connecting.

■ Ensure you ﬂush nitrogen through to clear the refrigerant pipe work. This needs to be done before connecting to the outdoor unit.

5.10 Strength/Tightness Test

Pressure test the system with nitrogen to 40kgf/cm2. Ensure a 24 hour strength test has been completed for all new installations. For guidance on tightness testing for existing installations, please refer to F Gas Regulations.

Fig. 5-4

SBOX Indoor unit

Liquid pipe

Nitrogen

High-pressure gas pipe

Low-pressure gas pipe

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