Toshiba HFC R407C Installation Instructions

Outdoor

Installation Instructions

Air Conditioner – Multi Split Type System

Außengerät

Installationsanleitung

Klimaanlage – Geteilte Multi-Bauweise

Instructions

d’Installation Extérieure

Climatiseur – Système de Type Multi Split

Buiten

Installatievoorschriften

Airconditioning – Multi-delig Type Systeem

Istruzioni per

l’installazione dell’unità esterna

Condizionatore d’aria – Tipo Multi Split

Modular Multi System

Exterior

Instrucciones de Instalación

Aire acondicionado – Sistema de Tipo Multi Split

HFC

R407C

1402241301R01

Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Trial Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

Passer à la page 65 pour lire le manuel d’installation en français.

Die deutsche Montageanleitung finden Sie auf Seite 127.

Por favor, vaya a la página 189 para seguir las instrucciones del manual de instalacíon en lengua española.

Il manuale d’installazione italiano è a pagina 251.

Zie bladzijde 313 voor de Nederlandse Installatichandleiding.

Introduction

Contents

Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Metric/Imperial pipe conversion . . . . . . . . . . . . . . . . . . . . .7

Please read these instructions carefully before starting the installation. This equipment should only be installed by suitably trained operatives. In all cases ensure safe working practice: Observe precautions for persons in the vicinity of

the works. Ensure that all local, national and international regulations are satisfied. Check that the electrical specifications of the unit meet the requirements of the site. Carefully unpack the equipment, check for damage or shortages. Please report any damage

immediately.

These units comply with EC Directive: 73/23/EEC (Low Voltage Directive) and 89/336/EEC (Electro Magnetic Compatibility). Accordingly, they are designated for use in commercial and industrial environments.

Avoid installation in the following locations:

Where the water drainage may cause a nuisance or a hazard when frozen. Where there is a danger of flammable gas leakage. Where there are high concentrations of oil. Where the atmosphere contains an excess of salt (as in coastal areas). Special maintenance

is required to maintain product design life. Where the airflow from the outdoor unit may cause annoyance. Where the operating noise of the outdoor unit may cause annoyance. Where the foundation is not strong enough to fully withstand the weight of the outdoor unit. Where strong winds may blow against the air inlet of the outdoor unit.

Precautions for R407C Systems

R407C outdoor units use synthetic oils which are extremely hygroscopic. Therefore ensure that the refrigerant system is NEVER exposed to air or any form of moisture.

Mineral oils are unsuitable for use in these units and may lead to premature system failure. Use only equipment which is suitable for use with R407C. Never use equipment which has

been used with R22. R407C should only be charged from the service cylinder in the liquid phase. It is advisable to

use a gauge manifold set equipped with a liquid sight glass fitted in the centre (entry) port.

Introduction

Precautions

Introduction

Operating Conditions

1. Allocation standard of Model name

2. Range of combined units

No. of combined units : 1 to 5 units Capacity range : Equivalent to 14HP (0384kW type) to 46HP (1288kW)

3. Restriction for combination units

(1) The Inverter Unit should have the maximum capacity among all units in

that combination.

(2) The 6HP fixed-speed unit is available only with the combination of 14HP

and 22HP. (It cannot be used for any other combination.)

4. Rated conditions

Cooling : Indoor air temperature 27°C DB/19°C WB

Outdoor air temperature 35°C DB/25°C WB

Heating : Indoor air temperature 21°C DB/15.5°C WB

Outdoor air temperature 7°C DB/6° C WB

5. Mode Priority

This Outdoor Unit is set to operate with the Heating mode taking precidence. This precidence can be switched between Heat and Cool mode using the DIP switch 07 on the Outdoor Unit Interface PCB (MCC-1343-01) as follows:

Outdoor Temperature

–5 ~ 43°C Cooling

–15 ~ 21°C Heating

Room Temperature

18 ~ 32°C Cooling 15 ~ 29°C Heating

Room Humidity <80% Cooling

T – Inverter X – Fixed Speed

0280 – 28.0kW (10HP) 0224 – 22.4kW (8HP) 0160 – 16.0kW (6HP)

C – Cooling H – Heating

MM–A0280HT

INDOOR

OUTDOOR

A – Outdoor

Modular Multi

028 – 2.8kW (1HP) 042 – 4.2kW (1.5HP) 056 – 5.6kW (2HP) 080 – 8.0kW (3HP) 112 – 11.2kW (4HP) 140 – 14.0kW (5HP)

MM–TU056

Modular Multi

B – Built-In Duct Type C (CR) – Ceiling Type (IR Remote) K (KR) – High Wall Type (IR Remote) N – Carcase Type S (SR) – Low Wall Type (IR Remote) SB – Built-In Slim Duct Type TU – 2 Way Cassette Type U – 4 Way Cassette Type

ON OFF

OFF

Heat Priority (factory set) Cool Priority

Introduction

Components

Metric/Imperial pipe conversion

Inverter unit Fixed-speed unit Appearance

Corresponding HP

8HP 10HP 6HP 8HP 10HP

Model name MM-A0224HT MM-A0280HT MM-A0160HX MM-A0224HX MM-A0280HX

Cooling capacity (kW) 22.4 28.0 16.0 22.4 28.0

Heating capacity (kW) 25.0 31.5 18.0 25.0 31.5

Corresponding HP 8HP 10HP 14HP 16HP 18HP 20HP 22HP 24HP 26HP 28HP 30HP 32HP 34HP 36HP 38HP 40HP 42HP 44HP 46HP

Combined Model MM-A~HT

0224 0280 0384 0440 0504 0560 0608 0672 0728 0784 0840 0896 0952 1008 1064 1120 1176 1232 1288

Cooling capacity (kW) 22.4 28.0 38.4 44.8 50.4 56.0 60.8 67.2 72.8 78.4 84.0 89.6 95.2 100.8 106.4 112.0 117.6 123.2 128.8

Inverter unit 8HP 10HP 8HP 8HP 10HP 10HP 8HP 8HP 10HP 10HP 10HP 8HP 10HP 10HP 10HP 10HP 10HP 10HP 10HP

— — 6HP 8HP 8HP 10HP 8HP 8HP 8HP 10HP 10HP 8HP 8HP 10HP 10HP 10HP 8HP 10HP 10HP

— — — — — — 6HP 8HP 8HP 8HP 10HP 8HP 8HP 8HP 10HP 10HP 8HP 8HP 10HP

——— ————— ———8HP8HP8HP8HP10HP 8HP 8HP 8HP

——— ————— ————————8HP8HP8HP

13 16 16 18 18 20 22 24 26 28 30 32 34 36 38 40 40 40 40

Min. HP Connection 4 5 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

Max. HP Connection 10.8 13.5 18.9 21.6 24.3 27 29.7 32.4 35.1 37.8 40.5 43.2 45.9 48.6 51.3 54 56.7 59.4 62.1

Combined outdoor units

No. of connectable indoor units

Fixedspeed unit

1. Outdoor Unit

2. Outdoor Units (Combination of Outdoor Units)

Diameter (mm) 6.4 9.5 12.7 15.9 19.0 22.0 28.6 34.9 41.3 54.1

Nominal Diameter (inch)

/8 1 1/8 1 3/8 1 5/8 2 1/8

Note: 1.0MPaG = 10.2kgf/cm2G

Introduction

Components

Type Appearance Model name Capacity code/

Cooling Capacity Heating Capacity

HP (kW) (kW)

MM-U056 2 5.6 6.4 MM-U080 3 8.0 9.6 MM-U112 4 11.2 12.8 MM-U140 5 14.0 15.8

MM-TU028 1 2.8 3.2 MM-TU042 1.5 4.2 4.8 MM-TU056 2 5.6 6.4

MM-SB028 1 2.8 3.2

MM-B056 2 5.6 6.4 MM-B080 3 8.0 9.6 MM-B112 4 11.2 12.8 MM-B140 5 14.0 15.8

MM-C/CR042 1.5 4.2 4.8 MM-C/CR056 2 5.6 6.4 MM-C/CR080 3 8.0 9.6 MM-C/CR112 4 11.2 12.8 MM-C/CR140 5 14.0 15.8

MM-K/KR042 1.5 4.2 4.8 MM-K/KR056 2 5.6 6.4 MM-K/KR080 3 8.0 9.6

MM-N028 1 2.8 3.2 MM-N042 1.5 4.2 4.8 MM-N056 2 5.6 6.4 MM-N080 3 8.0 9.6

MM-S/SR056 2 5.6 6.4 MM-S/SR080 3 8.0 9.6

4 Way Cassette Type ‘U’

2 Way Cassette Type ‘TU’

Built-In Slim Duct Type ‘SB’

Built-In Duct, Type ‘B’

Ceiling Type ‘C’

High Wall Type ‘K’

Carcase Type ‘N’

Low Wall Type ‘S’

3. Indoor Unit

Installation

Contents

Outdoor Unit

Transportation of the Outdoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Installation of Outdoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Dimensional Drawings Outdoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . .12

Dimensional Drawings Two Units Connected . . . . . . . . . . . . . . . . . . . .13

Dimensional Drawings Three Units Connected . . . . . . . . . . . . . . . . . . .14

Dimensional Drawings Four Units Connected . . . . . . . . . . . . . . . . . . . .15

Dimensional Drawings Five Units Connected . . . . . . . . . . . . . . . . . . . .16

Multiple Installation on the Rooftop . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Piping

Free Branching System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Connecting Refrigerant Pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Permissible Length/Height Separation of Refrigerant Piping . . . . . . . .21

Selection of Refrigerant Piping and Charge Requirement . . . . . . . . . .22

Branch Headers/Branch Joints (Accessories) . . . . . . . . . . . . . . . . . . . . .24

Branch Header/T-shape Branch Joint . . . . . . . . . . . . . . . . . . . . . . . . . .25

Connecting the Branching Kit/Y-shape Branching Joint . . . . . . . . . . . .26

Heat Insulating the Branching Pipes/Branching Header . . . . . . . . . . .27

T-shape Branching Joint – to Connect Outdoor Units . . . . . . . . . . . . . .29

Installation of Gas/Liquid Branching Pipes . . . . . . . . . . . . . . . . . . . . . .30

Airtight Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Leak Position Check/Air Purge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Calculating the Additional Refrigerant Required . . . . . . . . . . . . . . . . .33

Additional Charge Amounts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Wiring

General/Wiring System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Connecting Power Source Cable/Control Cable . . . . . . . . . . . . . . . . . .36

Control Wiring Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Installation

Outdoor Unit

Transportation of the Outdoor Unit

Fork Lift

• Front Access – insert the forks into the slots on the fixing legs.

• Side Access – see diagram.

Fork lift

Fork lift/ Hand Truck

Transportation Slots

Protection

Fixing Leg

Protection

Rope

Crane

• Check the suitability of the lifting rope (see table).

• Secure lifting rope through transportation slot.

• Protect the unit where rope contact could scratch or deform it.

Model Weight MM-A0280HT 284.0kg MM-A0224HT 282.0kg MM-A0280HX 280.0kg MM-A0224HX 278.0kg MM-A0160HX 204.0kg

Front Access Side Access

Installation

Installation of Outdoor Unit

1. Align the outdoor units at intervals of 20mm or more.

Fix the outdoor units with M12 anchor bolts. (4 positions per unit.)

Anchor bolt with 20mm length is suitable.

• Anchor bolt pitch is as shown in the following figure.

• However, the equivalent pipe length between the nearest outdoor unit and farthest outdoor unit of the refrigerating cycle system should not exceed 20m.

2. When routing the refrigerant piping through the base, the fixing height of the base (two-divided foundations) must be 500m or more.

3. Correct foundation mounts for supporting the Outdoor unit:

Note: The leading outdoor unit to be connected to the main refrigerant piping for the indoor

units must be an inverter unit.

Outdoor Unit

M12 anchor bolt, 4 positions per unit

≥ 20mm

700mm ≥ 310mm 700mm ≥ 310mm 700mm

755mm

≥ 500mm

20mm

≥ 20mm

15 x 20mm slot

Refrigerant Piping

✖

✔

Dimensional Drawings

Outdoor Unit

Model Name: MM-A0280HT, MM-A0224HT, MM-A0280HX, MM-A0224HX, MM-A0160HX

Installation

Outdoor Unit

700

990

790

500

1700

1560

700 9088

130

145

140

170

125

115

173

610 100

700

750

100

630 80

755

245

190

755

235

Model

ØA ØB ØC

mm mm mm

MM-A0280HT, MM-A0280HX 28.6 12.7 9.52 MM-A0224HT, MM-A0224HX 22.2 12.7 9.52 MM-A0160HX 22.2 9.52 9.52

4-15 x 20 (Slot)

Fixing bolt pitch

(including fixed leg)

Grounding part of bottom plate

Base

Fixing bolt pitch

Base

Fixing bolt pitch

Refrigerant pipe connecting port (Gas side) braze connection (ØA)

Refrigerant pipe connecting port (Liquid side) flare connection (ØB)

Balance pipe connecting port flare connection (ØC)

(Slot pitch)

2-60 x 150 Slot (for transport)

(knock out)

Refrigerant pipe connecting port (Liquid side)

Balance pipe connecting port

Refrigerant pipe connecting port (Gas side)

(knock out)

Details of piping

connections

Base bolt position

Note: All dimensions in (mm)

Installation

Dimensional Drawings

Two Units Connected

Model Name: MM-A0384HT, MM-A0440HT, MM-A0504HT, MM-A0560HT

Outdoor Unit

2000

700

990 990

700

750

790

1700

1560

700

1 2

8-15 x 20 (Slot)

755 Fixing bolt pitch

Fixing bolt pitch

(including fixed leg)

≥ 20

(Rear side)

≥ 300

≥ 10

≥ 500

(Front side)

≥ 20

≥ 2020

≥ 10

≥ 1550

No. Name

Outdoor Unit (Inverter type) Outdoor Unit (Fixed-speed type)

Note: All dimensions in (mm)

Dimensional Drawings

Three Units Connected

Model Name: MM-A0608HT, MM-A0672HT, MM-A0728HT, MM-A0784HT, MM-A0840HT

Installation

Outdoor Unit

700

990 990 990

700 700

750

790

1700

1560

700

310

≥ 20

12-15 x 20 (Slot)

755 Fixing bolt pitch

(including fixed leg)

Fixing bolt pitch

(Rear side)

≥ 300

≥ 10

≥ 500

(Front side)

≥ 20

≥ 3030

≥ 10

≥ 1550

No. Name

Outdoor Unit (Inverter type) Outdoor Unit (Fixed-speed type 1) Outdoor Unit (Fixed-speed type 2)

Note: All dimensions in (mm)

Dimensional Drawings

Four Units Connected

Model Name: MM-A0896HT, MM-A0952HT, MM-A1008HT, MM-A1064HT, MM-A1120HT

Installation

Outdoor Unit

≥ 20

≥ 20 ≥ 20

16 - 15 x 20 (Slot)

755 Fixing bolt pitch

(including fixed leg)

(Rear side)

≥ 300

≥ 10

≥ 500

(Front side)

4020

1700

1560

700

990

700

990

700

990

700

750

790

990

310

≥ 20

≥ 4040

No. Name

Outdoor Unit (Inverter type) Outdoor Unit (Fixed-speed type 1) Outdoor Unit (Fixed-speed type 2) Outdoor Unit (Fixed-speed type 3)

Fixing bolt pitch

Fixing bolt pitch Fixing bolt pitch Fixing bolt pitch

≥ 1550

≥ 10

Note: All dimensions in (mm)

Dimensional Drawings

Five Units Connected

Model Name: MM-A1176HT, MM-A1232HT, MM-A1288HT

Installation

Outdoor Unit

5030

1700

1560

700

990

700

990

700

990

700

990

700

790

990

310

≥ 20 ≥ 20 ≥ 20 ≥ 20

20 - 15 x 20 (Slot)

755 Fixing bolt pitch

(including fixed leg)

Fixing bolt pitch Fixing bolt pitch Fixing bolt pitch Fixing bolt pitch Fixing bolt pitch

(Rear side)

≥ 300

≥ 10

≥ 500

(Front side)

≥ 10

≥ 1550

≥ 20 ≥ 20 ≥ 20 ≥ 20

≥ 5050

No. Name

Outdoor Unit (Inverter type) Outdoor Unit (Fixed-speed type 1) Outdoor Unit (Fixed-speed type 2) Outdoor Unit (Fixed-speed type 3) Outdoor Unit (Fixed-speed type 4)

Note: All dimensions in (mm)

Multiple Installation on the Rooftop

When the Outer Wall is Higher than the Outdoor Unit

If a hole can be made in the wall:

1. Set an aperture ratio so that suction air volume Vs from the hole becomes 1.5m/s or less.

2. Height of discharge duct: HD = H - h.

If a hole cannot be made:

1. Set a base with 500 to 1,000mm height.

2. Height of discharge duct: HD = H - h.

Installation

Outdoor Unit

≥ 300

≥ 600

≥ 20 ≥ 20 ≥ 20 ≥ 20≥ 10

(Front side)

Discharge duct

≥ 1000

Hole in wall

Discharge duct

Base

500 – 1000

≥ 300≥ 600

≥ 20 ≥ 20 ≥ 20 ≥ 20≥ 10

(Front side)

Note: All dimensions in (mm)

Installation

Outdoor Unit

When the Outer Wall is Lower than the Outdoor Unit

1-line installation

2-parallel lines installation

3-parallel lines installation

*When refrigerant piping is routed from the front

of the unit, distance between Outdoor Unit and Connecting piping must be 500mm or more.

≥ 300

≥ 500

≥ 20 ≥ 20 ≥ 20 ≥ 20≥ 10

(Front side)

≥ 600

*(≥ 1000)

≥ 300

≥ 20 ≥ 20 ≥ 20 ≥ 20

≤ 800

≥ 10

(Front side)

≥ 600

*(≥ 1000)

≥ 300

≥ 500 ≥ 600

≥ 20 ≥ 20 ≥ 20 ≥ 20≥ 10

(Front side)

≤ 800

≥ 500

Connecting Piping

Piping

Note: All dimensions in (mm)

Installation

Piping

Free Branching System

The following five branching systems are available to increase the flexibility of refrigerant piping design.

Outdoor units

Branching joint

Indoor units

Line branching system

Remote

controller

Outdoor units

Branching joint

Indoor units

Line branching system after header branching

Header branching system after header branching

Remote

controller

Outdoor units

Branching joint

Indoor units

Header branching system after line branching

Remote

controller

Outdoor units

Branching header

Indoor units

Header branching system

Remote controller

Installation

Piping

Connecting Refrigerant Pipes

1. To access the refrigerant piping connections and electrical wiring terminals, remove the 7xM5 securing bolts in the front panel. To remove the panel, lift it up and away from its hanging tabs – See diagram.

2. The refrigerant pipes can be routed forwards, downwards or sideways.

3. If the pipes are routed forwards, make sure they exit through the Piping/Wiring Panel – (remove knock out section) and allow at least 500mm between the Outdoor Unit and the main pipe connecting it to the Indoor Unit. This is for servicing access. (Replacing the compressor, for example, requires a space of at least 500mm.)

4. If the pipes are routed downwards, remove the knockout section in the baseplate of the Outdoor Unit. This will enable access. They can then be connected to the left or right, or the rear side. (Leading pipe of the balancing should be within 4m.)

Notes:

1. When brazing, use nitrogen. This prevents internal oxidisation of the pipes.

2. Always use clean new pipe, and ensure it is not contaminated by water or dust.

3. Always use a double spanner on the flare nut – and tighten to the specified torque: (see table).

Connecting pipe Tightening Re-tightening

outer dia. (mm) torque (Nm) torque (Nm)

Ø6.4 11.8 (1.2kgf m) 13.7 (1.4kgf m)

Ø9.5 24.5 (2.5kgf m) 29.4 (3.0kgf m) Ø12.7 49.0 (5.0kgf m) 53.9 (5.5kgf m) Ø15.9 78.4 (8.0kgf m) 98.0 (10.0kgf m) Ø19.0 98.0 (10.0kgf m) 117.7 (12.0kgf m)

WARNING!

During installation – if the refrigerant gas leaks, ventilate the room. After installation – check for gas leakages.

If refrigerant gas comes into contact with fire – noxious gas may result!

Front panel

Piping/Wiring Panel

Within 4m

Pipes routed downwards

Pipes routed forward

≥ 500

Ta b

Valve at balance side (oil)

Valve at liquid side

Valve at gas side

Note: All dimensions in (mm)

Installation

Piping

Permissible Length/Height Separation of Refrigerant Piping

LA LB

Lb Lc

bc dea

ghi jf

(a)

(d)

(b) (c)

Fixed-speed Unit n

Valve for additional Units

Note: In <Ex.2>, a large amount of refrigerant and oil may

return to the Inverter Unit. Therefore, set the T-shape joint so that oil does not enter directly.

Branching header

Branching piping

Connecting piping of Indoor Unit

Indoor Unit

Length corresponded to farthest piping L≤ 125m

Length corresponded to farthest piping after 1st branching L≤ 50m

Height difference between Indoor Units H2≤ 30m

Indoor Unit

1st branching section

Main piping

Main connecting piping between Outdoor Units Length corresponded to farthest piping between Outdoor Units LO≤ 20m

Connecting piping of Outdoor Unit

Fixedspeed Unit 2

Fixedspeed

Unit 1

Inverter

Unit

Fixed-

speed

Unit 2

Fixedspeed Unit 1

Inverter

Unit

Fixedspeed Unit 2

Fixedspeed Unit 1

Inverter

Unit

Outdoor Unit

Height difference between Outdoor Units H3≤ 4m

Height difference between Outdoor Units H1≤ 50m

T-shape branching joint

Y-joint

System Restrictions Notes: Combination of Outdoor Units: Inverter Unit +

Fixed-speed Unit (0 to 4 units). Combination of Fixed-speed Units without Inverter Unit is not permissible. The Inverter Unit is the master Outdoor Unit and is directly connected to the indoor distribution pipe. Install the Outdoor Units in order of capacity. (Inverter Unit≥ Fixed-speed Unit 1> Fixed-speed Unit 2>Fixed-speed Unit n).

Max. No. of combined outdoor units 5 units Max. capacity of combined outdoor units 128.8kW/46HP Max. No. of connected indoor units 40 units Max. capacity of combined H2≤ 15 135% indoor units H2>15 105%

Allowable value Piping section

Total extension of pipe (Liquid pipe, real length) 250m

LA + LB + La + Lb + Lc + Ld + L1 + L2 + L3 + L4+

L5 + L6 + L7 + a + b + c + d + e + f + g + h + i + j

Farthest piping length L (*)

Real length 100m

LA + LB + Ld + L1 + L3 + L4 + L5 + L6 + j

Piping Equivalent length 125m length Equivalent length of farthest piping from 1st branching Li (*) 50m L3 + L4 + L5 + L6 + j

Equivalent length of farthest piping between outdoor units LO (*) 20m LA + LB + Ld, LA + Lb, LA + LB + Lc Max. equivalent length of outdoor unit connecting piping 10m Ld, La, Lb, Lc

Height between indoor

Upper outdoor unit 50m ——

Height

and outdoor units H1

Lower outdoor unit 30m ——

difference Height between indoor units H2 30m ——

Height between outdoor units H3 4m ——

*(d) is Outdoor Unit farthest from branching and (j) is Indoor Unit farthest from 1st branching.

<Ex. 1> <Ex. 2>

Installation

Piping

Selection of Refrigerant Piping and Charge Requirement

1 1 1

5 5 5

5 5

5 5 5 5 5

Fixedspeed Unit n

Fixedspeed Unit 2

Fixedspeed Unit 1

Inverter

Unit

Branching piping

Header Branching Pipe

Outdoor Unit

Outdoor Unit connecting piping

Main connecting piping between Outdoor Units

Main piping

T-shape branching joint

Balance pipe

Y-shape branching joint

Indoor Unit connecting piping

1st branching section

Indoor Unit

Indoor Unit connecting pipe

kW HP Model name Gas side Liquid side

16.0 6 MM-A0160HX Ø22.2 Ø9.5

22.4 8 MM-A0224HT, MM-A0224HX Ø22.2 Ø12.7

28.0 10 MM-A0280HT, MM-A0280HX Ø28.6 Ø12.7

Total capacity code of all outdoor units Gas side Liquid side

Below 10 Ø22.2 Ø12.7 10 to Below 14 Ø28.6 Ø12.7 14 to Below 20 Ø34.9 Ø15.9 20 to Below 26 Ø41.3 Ø19.0 26 to Below 32 Ø41.3 Ø22.2

32 or more Ø54.1 Ø22.2

Total capacity code of indoor units

Gas side Liquid side

downstream (*1)

Below 4.0 Ø15.9 Ø9.5

4.0 to Below 6.4 Ø19.0 Ø9.5

6.4 to Below 13.2 Ø22.2 Ø12.7

13.2 to Below 19.2 Ø34.9 Ø15.9

19.2 to Below 25.2 Ø41.3 Ø19.0

25.2 to Below 31.2 Ø41.3 Ø19.0

31.2 or more Ø54.1 Ø22.2

Total capacity code of outdoor

Gas side Liquid side Balance pipe

units

Below 16 Ø28.6 Ø15.9 Ø9.5 16 to Below 20 Ø34.9 Ø15.9 Ø9.5 20 to Below 26 Ø41.3 Ø19.0 Ø9.5 26 to Below 32 Ø41.3 Ø22.2 Ø9.5

32 or more Ø54.1 Ø22.2 Ø9.5

Pipe Size of Outdoor Unit

Connecting Pipe Size Between Outdoor Units

Size of Main Pipe

Size Between Branching Sections

Note: All dimensions in (mm)

Installation

Piping

Unit Gas side

(*4)

Liquid side

028 type to 056 type Ø12.7 Ø 6.4

080 type Ø15.9 Ø 9.5

112 type to 140 type Ø19.0 Ø 9.5

i.e. MM-SB028 = Gas Ø12.7, Liquid Ø6.4

Liquid pipe size Additional refrigerant amount for liquid pipe 1m (kg)

Ø6.4 0.030

Ø9.5 0.065 Ø12.7 0.115 Ø15.9 0.190 Ø19.0 0.290 Ø22.2 0.420

Piping of Indoor Unit

Additional Refrigerant Amount

(*1) Code is determined according to the capacity code of the Indoor Units connected. For

details, refer to the Introduction section in this manual.

(*2) If the total capacity code value of Indoor Units exceeds that of Outdoor Units, apply the

capacity code of Outdoor Units.

(*3) When using a branch header, Indoor Units with a maximum of 6.0 capacity code in total

can be connected to each branch.

(*4) If the length of the gas pipe exceeds 30m from the 1st branching to an Indoor Unit,

increase the Gas pipe section by 1 size, i.e. MM-U140 = Gas Ø22.2, Liquid Ø9.5.

Note: All dimensions in (mm)

Model name Usage Appearance

RBM-Y018 Indoor unit capacity code (*1): Total below 6.4 Y-shape RBM-Y037 Indoor unit capacity code (*1): Total 6.4 or more and below 13.2 (*2) branching joint RBM-Y071 Indoor unit capacity code (*1): Total 13.2 or more and below 25.2 (*2)

RBM-Y129 Indoor unit capacity code (*1): Total 25.2 or more (*2)

4-branching header (*3)

RBM-H4037 Indoor unit capacity code (*1): Total below 13.2

Max. 4

RBM-H4071 Indoor unit capacity code (*1): Total 13.2 or more and below 25.2

branches

8-branching header (*3) RBM-H8037 Indoor unit capacity code (*1): Total below 13.2

Max. 8

RBM-H8071 Indoor unit capacity code (*1): Total 13.2 or more and below 25.2

branches

1 set of 3 types of T-shape joint pipes as described below: The required quantity is arranged and they are combined at the site.

T-shape branching joint (For connection of RBM-T129 outdoor unit)

Connecting pipe Corresponding dia. (mm) Qty

Balancing pipe Ø9.52 1

Piping at liquid side Ø12.7 to Ø22.2 1

Piping at gas side Ø22.2 to Ø54.1 1

Branching joints/headers

Installation

Piping

Branch Headers/Branch Joints (Accessories)

Note:

This additional connecting pipe is used if the gas pipe size is Ø41.3 or less. When brazing, the minimum insertion margin is 15mm.

Y-shape Branch Joint

Note: All dimensions in (mm)

[Gas side]

[Liquid side]

[Gas side]

Heat insulator

RBM-Y018

RBM-Y037

Heat insulator

Ø9.5

Ø6.4

Ø9.5

Ø19.0

Ø28.6

571

Ø22.2

Ø28.6

Ø9.5

Ø12.7

Ø15.9

Ø12.7

Ø9.5

Ø6.4

420

Ø15.9

Ø19.0

Ø15.9

Ø19.0

Ø9.5

Ø22.2

528

Ø15.9

Ø12.7

Ø9.5

Ø22.2

Ø31.8

100

Ø12.7

Ø15.9

120

420

Heat insulator

[Gas side]

[Liquid side]

RBM-Y071

RBM-Y129

Ø12.7

Ø9.5

Ø6.4

Ø15.9

Ø19.0

518

Heat insulator

523

Ø19.0

Ø22.2 Ø22.2

Ø41.3

Ø34.9

Ø41.3

Ø22.2

Ø19.0

Ø15.9

Ø19.0

Ø6.4

Ø9.5

Ø15.9

122.5

Ø12.7

Ø12.7 Ø9.5

444

423

638

Ø54.1

(outer dia.)

Ø54.1

Ø41.3

Ø54.1

212

Ø41.3

(outer dia.)

Ø19.0

Ø22.2

237

Ø34.9

160

Ø41.3

Ø15.9

Ø12.7

Ø34.9

Ø22.2

Ø54.1

(outer dia.)

253.5

126160

Ø34.9

(outer dia.)

Ø41.3

Ø19.0

194

Ø34.9

Ø22.2

Installation

Piping

Branch Header

Note: Pipe dia. shown indicates dia. of pipe to be connected.

T-shape Branch Joint

Note: All dimensions in (mm)

RBM-H8037

[Gas side]

[Liquid side]

Heat insulator

RBM-H4037

[Gas side]

[Liquid side]

Heat insulator

515

Ø15.9

Ø12.7

Ø15.9

Ø19.0

80 80 80

204

109

522

Ø19.0

Ø9.5

Ø6.4

Ø9.5

Ø22.2

Ø28.6

Ø9.5

Ø6.4

80 80 80 80 80 80 80

80808080808080

109

204

842

795

Ø12.7

Ø19.0

Ø19.0 Ø2.22

Ø28.6

Ø15.9

RBM-H4071

RBM-H8071

[Gas side]

[Liquid side]

Heat insulator

80 80 80

8080 80

209

109

449

522

Ø9.5

Ø6.4

Ø19.0

Ø34.9

Ø41.3

Ø15.9

Ø12.7

Ø9.5

Ø34.9

Ø9.5

Ø6.4 80 8080808080 80

80 80 80 80 80 80 80

209

109

842

769

Ø12.7

Ø41.3

Ø15.9

Ø19.0

Ø15.9

RBM-T129

[Gas side]

[Liquid side]

[Balance side]

Outside diameter

2 pieces included

3 pieces included

2 pieces included

Outside diameter

Ø54.1

Ø22.2

Ø9.52

Ø22.2

Ø19.0

Ø34.9

Ø41.3

Ø28.6

Ø22.2

Ø12.7

Ø9.53

Ø15.9

Piping

Installation

Connecting the Branching Kit

Y-shape Branching Joint

Y-shape Branching Joint for gas and liquid distribution

When the selected pipe size differs from the size of the y-shape branching joint pipe, cut the centre of the connecting section with a pipe cutter, as shown below.

• Use the attached auxiliary pipe to adjust the pipe dia. of the Y-shape branching joint at gas or liquid side (RBM-Y071, RBM-Y129). Cut the branched pipe and auxiliary pipe to the specified size, and then braze.

Piping at site

To Outdoor Unit

Y-shape branching joint for gas side/liquid distribution

To other Branching Pipe or Indoor Unit

Inlet

Outlet (1)

Outlet (2)

Ø34.9

Ø41.3

Ø34.9

Ø22.2

Ø19.0

Auxiliary pipe at gas side

Ø12.7

Ø15.9

Ø19.0

Ø34.9

Ø22.2

Y-shape Joint for gas and liquid distribution

• Install Y-shape branching joint so that it branches horizontally or vertically.

• Be sure to fit the insulation to the Y-shape branching joint supplied in the kit.

• Cutting position

Cut the pipe at the centre of each connecting section, and remove burr.

(Horizontal line)

(A view)

(B view)

Within ± 30°

Cut at the centre

Note: All dimensions in (mm)

Installation

Piping

Branching Header

When the selected pipe size prepared at site differs from the size of the branching header pipe, cut the centre of the connecting section with a pipe cutter as shown.

If the number of Indoor Units to be connected is less than the number of connections on the Branching Header, braze a pipe cap to the unused connectors.

Heat Insulating the Branching Pipes

Ensure the pipe insulation covers the piping up to the brazed accessory joints, as this will eliminate ingress of water – tape the pipe insulation to a thickness of 10mm or more, as shown.

RBM-Y129 (Gas side) (Prepared at site) RBM-Y071 (Gas side, Liquid side), RBM-Y129 (Liquid side)

Use insulator with a heat resistance of 120° C or over for gas pipes. To insulate the Branching Pipes, use a T-Shaped Joint cover with a thickness of 10mm or over – or a machined insulation portion, as shown.

• After the heat insulating, tape to seal.

Seal the joint with urethane foaming agent, etc.

Pipe heat insulator

Cut by approx. 60°

Cut by approx. 90°

Seal with vinyl tape

Heat insulating pipe for piping

Bring them face to face

Pipe heat insulator prepared at site

Heat insulator (prepared at site), 10mm or over

150

Branching Pipe

Heat insulator included accessory

Pipe heat

insulator

prepared at site

Place them edge to edge

Taping (prepared at site)

Heat insulator (prepared at site)

Prepared at site

To Indoor Unit

Gas branching header

Liquid branching header

To Indoor Unit

Prepared at site

To Outdoor Unit

Liquid side

Gas side

Liquid side

Pipe cap

Inlet

Installation

Piping

• Install the branching header so that it branches horizontally. DO NOT install vertically.

• Be sure to insulate the branching header with the insulation provided.

• When routing the branching header at the liquid side from the opposite side, cut both ends and use a pipe cap (not supplied), as shown.

• Support of branching header

Set a hanging metal support (prepared at site) for the branching header, after fitting heat insulation.

• Cutting position

Cut the centre of each connecting section, and remove burr.

Use a mini-cutter to cut branching headers up to Ø22.2.

(Horizontal line)

Gas side

Liquid side

(B view)

Gas side

(B view)

Liquid side

To B

Cut

To C

Pipe cap

Cut at the centre

Notes:

1. Make sure there’s a straight run of pipe at least 300mm long at the inlet side of Y-shaped Branching Joints and Branching Headers.

2. Install Y-shaped Branching Joint so they branch horizontally or vertically. In horizontal installations, set within ± 30°.

3. Install Branching Headers so they branch horizontally.

4. Do not use T-shaped Branching Joints for Branching Sections.

5. When using Y-Branches or Header Branches to prevent incorrect piping, attach a line number or name to each pipe.

Note: All dimensions in (mm)

Installation

Piping

T-shape Branching Joint – to Connect Outdoor Units

Branching Pipes at Gas Side/Liquid Side

Pipe prepared at site

Pipe arranged at site

Connecting pipe at gas/liquid side

Branching Pipe at gas/liquid side

To other Branching Pipe or Outdoor Unit

To other Branching Pipe or Branching Section of main pipe

To Outdoor Unit

Connecting pipe at gas/liquid side

To Outdoor Unit

To other Branching Pipe or Outdoor Unit

To other Branching Pipe or Branching Section of main pipe

Cut the centre

• Use the included connecting pipes for

gas/liquid sides to match to the appropriate pipe size. (The diagram shows a connecting example.)

• Cutting position of connecting pipe

When the selected pipe size prepared at site differs from the size of the Branching Pipe, cut the centre of the connecting section with a pipe cutter.

Installation

Piping

Installation of Gas/Liquid Branching Pipes

When combining two units, connect directly.

Balancing Branch Pipes (Oil)

Heat Insulation

Insulate liquid side, gas side and Balancing Pipes separately. Use insulator with a resistance of 120°C + for gas pipes. To insulate the Branching Pipes, use a T-Shaped Joint cover with a thickness of 10mm or over – or the machined one included. (Insulation for branching is not included.) To prevent condensation or dripping – seal the Branching Pipe securely, with no gaps.

Inverter

Outdoor Unit

Fixed-speed

Outdoor Unit

Inverter

Outdoor Unit

Fixed-speed

Outdoor Unit

INCORRECT

ROUTING

To Outdoor

Unit

Branching Pipe for Balancing Pipe (included)

Pipe prepared at site

To other Branching Pipe or Outdoor Unit

Inverter

Outdoor Unit

Connect

Balancing

Pipe directly

Fixed-speed

Outdoor Unit

Seal with vinyl tape

Heat insulator

External dia. of Branching Pipe

Seal the joint with urethane foaming agent, etc.

Heat insulating pipe for piping

Drill a hole with dia. larger than external dia. of heat insulating pipe for piping

✖

✔

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