Toshiba MMU-AP0241H, MMU-AP0121H, MMU-AP0271H, MMU-AP0301H, MMU-AP0361H Installation Manual

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FILE NO. A03-012

PRINTED IN JAPAN, Sep, 2004 ToMo

Indoor Unit

<4-way Air Discharge Cassette Type>

MMU-AP0091H, AP0121H, AP0151H, MMU-AP0181H, AP0241H, AP0271H, MMU-AP0301H, AP0361H, AP0481H MMU-AP0561H

<2-way Air Discharge Cassette Type>

MMU-AP0071WH, AP0091WH, AP0121WH, MMU-AP0151WH, AP0181WH, AP0241WH, MMU-AP0271WH, AP0301WH

MMU-AP0481WH (CHINA market only)

<1-way Air Discharge Cassette Type>

MMU-AP0071YH, AP0091YH, AP0121YH, MMU-AP0151SH, AP0181SH, AP0241SH

MMD-AP0071BH, AP0091BH, AP0121BH, MMD-AP0151BH, AP0181BH, AP0241BH, MMD-AP0271BH, AP0301BH, AP0361BH, MMD-AP0481BH, AP0561BH

MMD-AP0181H, AP0241H, AP0271H, MMD-AP0361H, AP0481H, AP0721H, MMD-AP0961H

MMC-AP0151H, AP0181H, AP0241H, MMC-AP0271H, AP0361H, AP0481H

MMK-AP0071H, AP0091H, AP0121H, MMK-AP0151H, AP0181H, AP0241H

MML-AP0071H, AP0091H, AP0121H, MML-AP0151H, AP0181H, AP0241H

MML-AP0071BH, AP0091BH, AP0121BH, MML-AP0151BH, AP0181BH, AP0241BH

MMF-AP0151H, AP0181H, AP0241H, MMF-AP0271H, AP0361H, AP0481H, MMF-AP0561H

Outdoor Unit

Cooling Only Model

MMY-MAP0501T8, MAP0601T8 MMY-MAP0801T8, MAP1001T8 MMY-MAP1201T8

Heat Pump Model

MMY-MAP0501HT8, MAP0601HT8 MMY-MAP0801HT8, MAP1001HT8 MMY-MAP1201HT8

Heat Pump Model

MMY-MAP0501HT7, MAP0601HT7 MMY-MAP0801HT7, MAP1001HT7 MMY-MAP1201HT7

INSTALLATION MANUAL

WARNINGS ON REFRIGERANT LEAKAGE

Outdoor unit

e.g., charged amount (15kg)

e.g., charged amount (10kg)

Indoor unit

Room A Room B Room C Room D Room E Room F

For the amount of charge in this example:

The possible amount of leaked refrigerant gas in rooms A, B and C is 10kg. The possible amount of leaked refrigerant gas in rooms D, E and F is 15kg.

NOTE : 2

The standards for minimum room volume are as follows.

(1) No partition (shaded portion)

Outdoor unit

Refrigerant piping

Indoor unit

(2) When there is an effective opening with the

adjacent room for ventilation of leaking refrigerant gas (opening without a door, or an opening 0.15% or larger than the respective floor spaces at the top or bottom of the door).

(3) If an indoor unit is installed in each partitioned

room and the refrigerant tubing is interconnected, the smallest room of course becomes the object. But when a mechanical ventilation is installed interlocked with a gas leakage detector in the smallest room where the density limit is exceeded, the volume of the next smallest room becomes the object.

Outdoor unit

Refrigerant piping

Indoor unit

Very small room

Small room

Medium room

Large room

Mechanical ventilation device - Gas leak detector

NOTE 3 : The minimum indoor floor area compared with the

amount of refrigerant is roughly as follows: (When the ceiling is 2.7m high)

10 20 30

Range below the density limit of 0.3 kg/m³ (countermeasures not needed)

Range above the density limit of 0.3 kg/m³ (countermeasures needed)

Total amount of refrigerant

Min. indoor floor area

m²

Check of Concentration Limit

The room in which the air conditioner is to be installed requires a design that in the event of refrigerant gas leaking out, its concentration will not exceed a set limit.

The refrigerant R410A which is used in the air conditioner is safe, without the toxicity or combustibility of ammonia, and is not restricted by laws to be imposed which protect the ozone layer. However, since it contains more than air, it poses the risk of suffocation if its concentration should rise excessively. Suffocation from leakage of R410A is almost non-existent. With the recent increase in the number of high concentration buildings, however, the installation of multi air conditioner systems is on the increase because of the need for effective use of floor space, individual control, energy conservation by curtailing heat and carrying power etc. Most importantly, the multi air conditioner system is able to replenish a large amount of refrigerant compared with conventional individual air conditioners. If a single unit of the multi conditioner system is to be installed in a small room, select a suitable model and installation procedure so that if the refrigerant accidentally leaks out, its concentration does not reach the limit (and in the event of an emergency, measures can be made before injury can occur). In a room where the concentration may exceed the limit, create an opening with adjacent rooms, or install mechanical ventilation combined with a gas leak detection device. The concentration is as given below.

Total amount of refrigerant (kg)

Min. volume of the indoor unit installed room (m³)

≤ Concentration limit (kg/m³)

The concentration limit of R410A which is used in multi air conditioners is 0.3kg/m³.

NOTE 1 :

If there are 2 or more refrigerating systems in a single refrigerating device, the amounts of refrigerant should be as charged in each independent device.

Important

NOTE

A direct current motor is adopted for indoor fan motor in the Concealed Duct Standard Type air conditioner. Caused from its characteristics, a current limit works on the direct current motor. When replacing the highperformance filter or when opening the service panel, be sure to stop the fan. If an above action is executed during the fan operation, the protective control works to stop the unit oper ation, and the check code “P12” may be appear. However it is not a trouble. When the desired operation has finished, be sure to reset the system to clear “P12” error code using the electric leak breaker of the indoor unit. Then push the operation ON/OFF button of the remote controller to return to the usual operation.

CONTENTS

1. SELECTING A LOCATION FOR INSTALLATION ..................................... 4

2. SAFETY NOTES......................................................................................... 9

3. CHECK POINTS....................................................................................... 10

4. KEY POINTS OF AIR CONDITIONER INSTALLATION .......................... 11

5. REFRIGERANT PIPE INSTALLATION .................................................... 12

6. INDOOR UNIT INSTALLATION................................................................ 42

7. OUTDOOR UNIT INSTALLATION............................................................ 79

8. ELECTRIC WIRING .................................................................................. 86

9. INDOOR UNIT TERMINAL BOARD PLACEMENT AND WIRING ........... 97

10. DRAIN PIPE INSTALLATION ................................................................. 102

11. ADJUSTMENT OF AIR DIRECTION...................................................... 110

12. ADDRESS SETUP.................................................................................. 114

13. TEST OPERATION ................................................................................. 133

14. SUPPORT FUNCTION IN TEST OPERATION ....................................... 140

15. TROUBLESHOOTING............................................................................ 162

16. AIR SPEED CHARACTERISTICS.......................................................... 167

17. FAN CHARACTERISTICS...................................................................... 172

18. APPLIED CONTROL.............................................................................. 176

CAUTION New Refrigerant Air Conditioner Installation

• THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R410A) WHICH DOES NOT DESTROY OZONE LAYER.

The characteristics of R410A refrigerant are ; easy to absorb water, oxidizing membrane or oil, and its pressure is approx. 1.6 times higher than that of refrigerant R22. Accompanied with the new refrigerant, refrigerating oil has also been changed. Therefore, during installation work, be sure that water, dust, former refrigerant, or refrigerating oil does not enter the refrigerating cycle.

To prevent charging an incorrect refrigerant and refrigerating oil, the sizes of connecting sections of charging port of the main unit and installation tools are charged from those for the conventional refrigerant.

Accordingly the exclusive tools are required for the new refrigerant (R410A). For connecting pipes, use new and clean piping designed for R410A, and please care so that water or dust

does not enter. Moreover, do not use the existing piping because there are problems with pressureresistance force and impurity in it.

1. SELECTING A LOCATION FOR INSTALLATION

WARNING

Install the air conditioner certainly at a location to sufficiently withstand the weight.

If the strength is insufficient, the unit may fall down resulting in human injury.

Perform a specified installation work to guard against a great wind such as typhoon or an earth quake.

An incomplete installation can cause accidents by the units failing and dropping.

The following models must be installed at height 2.5m or more from the floor. (Concealed type duct type and cassette type air conditioners)

If you insert your hands or others directly into the unit while the air conditioner operates, it is dangerous

because you may contact with revolving fan or active electricity.

Installation Location Selection for Outdoor unit

Obtain permission from the customer to install the unit in a location that satisfies the following requirements :

• A location that permits level installation of the unit.

• A location that provides enough space to service the unit safety

• A location where water draining from the unit will not pose a problem

Avoid installing in the following places.

• Place exposed to air with high salt content (seaside area), or place exposed to large quantities of sulfide gas (hot spring). (Should the unit be used in these places, special protective measures are needed.)

• Place exposed to oil, vapor, oil smoke or corrosive gas.

• Place where organic solvent is used nearby.

• Place close to a machine generating high frequency.

• Place where the discharged air blows directly into the window of the neighboring house. (For outdoor unit)

• Place where noise of the outdoor unit is easily transmitted. (When installing the air conditioner on the boundary with the neighbor, pay due attention to the level of noise.)

• Place with poor ventilation. (Especially in Concealed duct type indoor unit, before air ducting work, check whether value of air volume, static pressure and duct resistance are correct.)

Combination of outdoor unit

Cooling Only Model

(Capacity

code)

5HP ( 5) 6HP ( 6) 8HP ( 8) 10HP (10) 12HP (12) 14HP (14) 16HP (16) 18HP (18) 20HP (20) 22HP (22) 22HP (22) 24HP (24) 24HP (24) 26HP (26) 28HP (28) 30HP (30) 32HP (32) 32HP (32) 34HP (34) 34HP (34) 36HP (36) 36HP (36) 38HP (38) 40HP (40) 42HP (42) 44HP (44) 46HP (46) 48HP (46)

Model name

MMY-

MAP0501HT8 MAP0601HT8 MAP0801HT8 MAP1001HT8 MAP1201HT8

AP1401HT8 AP1601HT8 AP1801HT8 AP2001HT8 AP2201HT8 AP2211HT8 AP2401HT8 AP2411HT8 AP2601HT8 AP2801HT8 AP3001HT8 AP3201HT8 AP3211HT8 AP3401HT8 AP3411HT8 AP3601HT8 AP3611HT8 AP3801HT8 AP4001HT8 AP4201HT8 AP4401HT8 AP4601HT8 AP4801HT8

No. of

combined

units

1 1 1 1 1 2 2 2 2 3 2 3 2 3 3 3 4 3 4 3 4 3 4 4 4 4 4 4

Inverter 5HP Used Inverter 6HP Used Inverter 8HP Used Inverter 10HP Used Inverter 12HP Used

MMY- Q’ty MMY- Q’ty MMY- Q’ty MMY- Q’ty MMY- Q’ty

MAP0501HT8 1

MAP0601HT8 1

MAP0801HT8 1

MAP1001HT8 1

MAP1201HT8 1

MAP0601HT8 1 MAP0801HT8 1

MAP0801HT8 2 MAP0801HT8 1 MAP1001HT8 1

MAP1001HT8 2

MAP0601HT8 1 MAP0801HT8 2

MAP1001HT8 1 MAP1201HT8 1

MAP0801HT8 3

MAP1201HT8 2 MAP0801HT8 2 MAP1001HT8 1 MAP0801HT8 1 MAP1001HT8 2

MAP1001HT8 3

MAP0801HT8 4

MAP1001HT8 2 MAP1201HT8 1

MAP0801HT8 3 MAP1001HT8 1

MAP1001HT8 1 MAP1201HT8 2

MAP0801HT8 2 MAP1001HT8 2

MAP1201HT8 3 MAP0801HT8 1 MAP1001HT8 3

MAP1001HT8 4 MAP1001HT8 3 MAP1201HT8 1 MAP1001HT8 2 MAP1201HT8 2 MAP1001HT8 1 MAP1201HT8 3

MAP1201HT8 4

(Capacity

code)

5HP ( 5) 6HP ( 6)

8HP ( 8) 10HP (10) 12HP (12) 14HP (14) 16HP (16) 18HP (18) 20HP (20) 22HP (22) 22HP (22) 24HP (24) 24HP (24) 26HP (26) 28HP (28) 30HP (30) 32HP (32) 32HP (32) 34HP (34) 34HP (34) 36HP (36) 36HP (36) 38HP (38) 40HP (40) 42HP (42) 44HP (44) 46HP (46) 48HP (46)

Model name

MMY-

MAP0501T8 MAP0601T8 MAP0801T8 MAP1001T8 MAP1201T8

AP1401T8 AP1601T8 AP1801T8 AP2001T8 AP2201T8 AP2211T8 AP2401T8 AP2411T8 AP2601T8 AP2801T8 AP3001T8 AP3201T8 AP3211T8 AP3401T8 AP3411T8 AP3601T8 AP3611T8 AP3801T8 AP4001T8 AP4201T8 AP4401T8 AP4601T8 AP4801T8

No. of

combined

units

1 1 1 1 1 2 2 2 2 3 2 3 2 3 3 3 4 3 4 3 4 3 4 4 4 4 4 4

Inverter 5HP Used Inverter 6HP Used Inverter 8HP Used Inverter 10HP Used Inverter 12HP Used

MMY- Q’ty MMY- Q’ty MMY- Q’ty MMY- Q’ty MMY- Q’ty

MAP0501T8 1

MAP0601T8 1

MAP0801T8 1

MAP1001T8 1

MAP1201T8 1

MAP0601T8 1 MAP0801T8 1

MAP0801T8 2 MAP0801T8 1 MAP1001T8 1

MAP1001T8 2

MAP0601T8 1 MAP0801T8 2

MAP1001T8 1 MAP1201T8 1

MAP0801T8 3

MAP1201T8 2 MAP0801T8 2 MAP1001T8 1 MAP0801T8 1 MAP1001T8 2

MAP1001T8 3

MAP0801T8 4

MAP1001T8 2 MAP1201T8 1

MAP0801T8 3 MAP1001T8 1

MAP1001T8 1 MAP1201T8 2

MAP0801T8 2 MAP1001T8 2

MAP1201T8 3 MAP0801T8 1 MAP1001T8 3

MAP1001T8 4 MAP1001T8 3 MAP1201T8 1 MAP1001T8 2 MAP1201T8 2 MAP1001T8 1 MAP1201T8 3

MAP1201T8 4

Heat-pump Model (50Hz)

Heat-pump Model (60Hz)

(Capacity

code)

Model name

MMY-

MAP0501HT7 MAP0601HT7 MAP0801HT7 MAP1001HT7 MAP1201HT7

AP1401HT7 AP1601HT7 AP1801HT7 AP2001HT7 AP2201HT7 AP2211HT7 AP2401HT7 AP2411HT7 AP2601HT7 AP2801HT7 AP3001HT7 AP3201HT7 AP3211HT7 AP3401HT7 AP3411HT7 AP3601HT7 AP3611HT7 AP3801HT7 AP4001HT7 AP4201HT7 AP4401HT7 AP4601HT7 AP4801HT7

No. of

combined

units

1 1 1 1 1 2 2 2 2 3 2 3 2 3 3 3 4 3 4 3 4 3 4 4 4 4 4 4

Inverter 5HP Used Inverter 6HP Used Inverter 8HP Used Inverter 10HP Used Inverter 12HP Used

MMY- Q’ty MMY- Q’ty MMY- Q’ty MMY- Q’ty MMY- Q’ty

MAP0501HT7 1

MAP0601HT7 1

MAP0801HT7 1

MAP1001HT7 1

MAP1201HT7 1

MAP0601HT7 1 MAP0801HT7 1

MAP0801HT7 2 MAP0801HT7 1 MAP1001HT7 1

MAP1001HT7 2

MAP0601HT7 1 MAP0801HT7 2

MAP1001HT7 1 MAP1201HT7 1

MAP0801HT7 3

MAP1201HT7 2 MAP0801HT7 2 MAP1001HT7 1 MAP0801HT7 1 MAP1001HT7 2

MAP1001HT7 3

MAP0801HT7 4

MAP1001HT7 2 MAP1201HT7 1

MAP0801HT7 3 MAP1001HT7 1

MAP1001HT7 1 MAP1201HT7 2

MAP0801HT7 2 MAP1001HT7 2

MAP1201HT7 3 MAP0801HT7 1 MAP1001HT7 3

MAP1001HT7 4 MAP1001HT7 3 MAP1201HT7 1 MAP1001HT7 2 MAP1201HT7 2 MAP1001HT7 1 MAP1201HT7 3

MAP1201HT7 4

Equipments

1. Outdoor units

Inverter unit

Corresponding HP

5 HP 6 HP

8 HP 10 HP 12 HP

Heat pump

MMY- MAP0501HT8 MAP0601HT8

MAP0801HT8 MAP1001H8 MAP1201HT8

Heat pump

MMY- MAP0501HT7 MAP0601HT7 MAP0801HT7 MAP1001HT7 MAP1201HT7

Model name

Cooling only

MMY- MAP0501T8 MAP0601T8 MAP0801T8 MAP1001T8 MAP1201T8

Cooling capacity (kW) 14.0 16.0 22.4 28.0 33.5 Heating capacity (kW) 16.0 18.0 25.0 31.5 37.5

Appearance

2. Outdoor units (Combination of outdoor units)

Corresponding HP 5 HP 6 HP 8 HP 10 HP 12 HP 14 HP 16 H P

MMY- MAP0501HT8 MAP0601HT8 MAP0801HT8 MAP1001HT8 MAP1201HT8 AP1401HT8 AP1601HT8

MMY- MAP0501HT7 MAP0601HT7 MAP0801HT7 MAP1001HT7 MAP1201HT7 AP1401HT7 AP1601HT7

Combined Model

MMY- MAP0501T8 MAP0601T8 MAP0801T8 MAP1001T8 MAP1201T8 AP1401T8 AP1601T8

Cooli ng ca p ac it y ( kW ) 14.0 16.0 22.4 28.0 33.5 38.4 45.0 Heati n g ca pa c it y (kW ) 16.0 18.0 25.0 31.5 37.5 43.0 50.0

5 HP 6 HP 8 HP 10 HP 12 HP 8 HP 8 HP

—————6 HP 8 HP ———————

Combined outdoor units

———————

No. of connectab le ind oor units 8 10 13 16 20 23 27

Corresponding HP 18 HP 20 HP 22 HP 22 HP 24 HP 24 HP 26 HP

MMY- AP1801HT8 AP2001HT8 AP2201HT8 AP2211HT8 AP2401HT8 AP2411HT8 AP2601HT8

MMY- AP1801HT7 AP2001HT7 AP2201HT7 AP2211HT7 AP2401HT7 AP2411HT7 AP2601HT7

Combined Model

MMY- AP1801T8 AP2001T8 AP2201T8 AP2211T8 AP2401T8 AP2411T8 AP2601T8

Cooli ng ca p ac it y ( kW ) 50.4 56.0 61.5 61.5 68.0 68.0 73.0 Heati n g ca pa c it y (kW ) 56.5 63.0 69.0 69.0 76.5 76.5 81.5

10 HP 10 HP 8 HP 12 HP 8 HP 12 HP 10 HP 8 HP 10 HP 8 HP 10 HP 8 HP 12 HP 8 HP

——6 HP — 8 HP — 8 HP

Combined outdoor units

———————

No. of connectab le ind oor units 30 33 37 37 40 40 43

Corresponding HP 28 HP 30 HP 32 HP 32 HP 34 HP 34 HP 36 HP

MMY- AP2801HT8 AP3001HT8 AP3201HT8 AP3211HT8 AP3401HT8 AP3411HT8 AP3601HT8

MMY- AP2801HT7 AP3001HT7 AP3201HT7 AP3211HT7 AP3401HT7 AP3411HT7 AP3601HT7

Combined Model

MMY- AP2801T8 AP3001T8 AP3201T8 AP3211T8 AP3401T8 AP3411T8 AP3601T8

Cooling capacity (kW) 78.5 84.0 90.0 90.0 96.0 96.0 101.0 Heati n g c ap ac i ty (k W) 88.0 95.0 100.0 100.0 108.0 108.0 113.0

10 HP 10 HP 8 HP 12 HP 10 HP 12 HP 10 HP 10 HP 10 HP 8 HP 10 HP 8 HP 12 HP 10 HP 8 HP 10 HP 8 HP 10 HP 8 HP 10 HP 8 HP

Combined outdoor units

——8 HP — 8 HP — 8 HP

No. of connectab le ind oor units 47 48 48 48 48 48 48

Corresponding HP 36 HP 38 HP 40 HP 42 HP 44 HP 46 HP 48 HP

MMY- AP3611HT8 AP3801HT8 AP4001HT8 AP4201HT8 AP4401HT8 AP4601HT8 AP4801HT8

MMY- AP3611HT7 AP3801HT7 AP4001HT7 AP4201HT7 AP4401HT7 AP4601HT7 AP4801HT7

Combined Model

MMY- AP3611T8 AP3801T8 AP4001T8 AP4201T8 AP4401T8 AP4601T8 AP4801T8

Cooli n g ca p ac i ty (k W ) 101.0 106.5 112.0 118.0 123.5 130.0 135.0 Heati n g c ap a ci ty ( kW) 113.0 119.5 126.5 132.0 138.0 145.0 150.0

12 HP 10 HP 10 HP 12 HP 12 HP 12 HP 12 HP 12 HP 10 HP 10 HP 10 HP 12 HP 12 HP 12 HP 12 HP 10 HP 10 HP 10 HP 10 HP 12 HP 12 HP

Combined outdoor units

— 8 HP 10 HP 10 HP 10 HP 10 HP 12 HP

No. of connectab le ind oor units 48 48 48 48 48 48 48

Tools

Required Tools

The used refrigerating oil is changed, and mixing of oil may cause a trouble such as generation of sludge, clogging of capillary, etc. Accordingly, the tools to be used are classified into the following three types.

(1) Tools exclusive for R410A (Those which cannot be used for conventional refrigerant (R22)) (2) Tools exclusive for R410A, but can be also used for conventional refrigerant (R22) (3) Tools commonly used for R410A and for conventional refrigerant (R22) The table below shows the tools exclusive for R410A and their interchangeability.

Tools exclusive for R410A (The following tools for R410A are required.)

Tools whose specifications are changed for R410A and their interchangeability

(Note 1) When flaring is carried out for R410A using the conventional flare tools, adjustment of projection

margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.

(Note 2) Charging cylinder for R410A is being currently developed.

General tools (Conventional tools can be used.)

In addition to the above exclusive tools, the following equipments which serve also for R22 are necessary as the general tools.

(1) Vacuum pump

Use vacuum pump by

attaching vacuum pump adapter. (2) Torque wrench (3) Pipe cutter

(4) Reamer (5) Pipe bender (6) Level vial (7) Screwdriver (+, –) (8) Spanner or Monkey wrench

(9) Hole core drill (10) Hexagon wrench

(Opposite side 4mm) (11) Tape measure (12) Metal saw

Also prepare the following equipments for other installation method and run check. (1) Clamp meter (2) Thermometer

(3) Insulation resistance tester (4) Electroscope

No.









  

  

Used tool

Flare tool Copper pipe gauge for

adjusting projection margin

Torque wrench Gauge manifold Charge hose

Vacuum pump adapter Electronic balance for

refrigerant charging Refrigerant cylinder Leakage detector Charging cylinder

Usage

Pipe flaring Flaring by conventional

flare tool

Connection of flare nut

Evacuating, refrigerant charge, run check, etc.

Vacuum evacuating Refrigerant charge Refrigerant charge

Gas leakage check Refrigerant charge

R410A

air conditioner installation

Existence of new equipment for R410A

Yes

Yes Yes Yes

Yes

(Note 2)

Whether conventional equipment can be used

*(Note 1)

× ×

Yes

× × ×

Conventional air

conditioner installation

Whether new equipment can be used with conventional refrigerant

*(Note 1)

× ×

2. SAFETY NOTES

• Ensure that all Local, National and International regulations are satisfied.

• Read this “SAFETY NOTES” carefully before Installation.

• The precautions described below include the important items regarding safety. Observe them without fail.

• After the installation work, perform a trial operation to check for any problem. Follow the Owner’s Manual to explain how to use and maintain the unit to the customer.

• Turn off the main power supply switch (or breaker) before the unit maintenance.

• Ask the customer to keep the Installation Manual together with the Owner’s Manual.

WARNING

• Ask an authorized dealer or qualified installation professional to install/maintain the air

conditioner.

Inappropriate installation may result in water leakage, electric shock or fire.

• Turn off the main power supply switch or breaker before attempting any electrical work.

Make sure all power switches are off. Failure to do so may cause electric shock.

• Connect the connecting wire correctly.

If the connecting wire is connected in a wrong way, electric parts may be damaged.

• When moving the air conditioner for the installation into another place, be very careful not to enter

any gaseous matter other than the specified refrigerant into the refrigeration cycle.

If air or any other gas is mixed in the refrigerant, the gas pressure in the refrigeration cycle becomes abnormally high and it as a result causes pipe burst and injuries on persons.

• Do not modify this unit by removing any of the safety guards or by by-passing any of the safety

interlock switches.

• Exposure of unit to water or other moisture before installation may cause a short-circuit of

electrical parts.

Do not store it in a wet basement or expose to rain or water.

• After unpacking the unit, examine it carefully if there are possible damage.

• Do not install in a place that might increase the vibration of the unit.

• To avoid personal injury (with sharp edges), be careful when handling parts.

• Perform installation work properly according to the Installation Manual.

Inappropriate installation may result in water leakage, electric shock or fire.

• When the air conditioner is installed in a small room, provide appropriate measures to ensure that

the concentration of refrigerant leakage occur in the room does not exceed the critical level.

• Install the air conditioner securely in a location where the base can sustain the weight adequately.

• Perform the specified installation work to guard against an earthquake.

If the air conditioner is not installed appropriately, accidents may occur due to the falling unit.

• If refrigerant gas has leaked during the installation work, ventilate the room immediately.

If the leaked refrigerant gas comes in contact with fire, noxious gas may generate.

• After the installation work, confirm that refrigerant gas does not leak.

If refrigerant gas leaks into the room and flows near a fire source, such as a cooking range, noxious gas might generate.

• Electrical work must be performed by a qualified electrician in accordance with the Installation

Manual. Make sure the air conditioner uses an exclusive power supply.

An insufficient power supply capacity or inappropriate installation may cause fire.

• Use the specified wires for wiring connect the terminals securely fix. To prevent external forces

applied to the terminals from affecting the terminals.

• Conform to the regulations of the local electric company when wiring the power supply.

Inappropriate grounding may cause electric shock.

• Do not install the air conditioner in a location subject to a risk of exposure to a combustible gas.

If a combustible gas leaks, and stays around the unit, a fire may occur.

3. CHECK POINTS

Check before operation

• Turn on the main power switch 12 hours or more before starting the operation.

• Check whether earth wire is disconnected or out of place.

• Check that air filter is installed to the indoor unit.

Heating capacity

• For heating operation, a heat pump type which absorbs the outdoor heat and deliver the heat in the room is adopted. If the outdoor temperature lowers, the heating capacity decreases.

• When the outdoor temperature is low, common use with other heating devices is recommended.

Defrost operation in heating operation

• If frost is found on the outdoor unit during heating operation, the defrost operation starts automatically (for approx. 2 to 10 minutes) so as to increase the heating effect.

• During defrost operation, the fans of both indoor and outdoor units stop.

Protection for 3 minutes

• The outdoor unit does not operate for approx. 3 minutes after air conditioner has been immediately restarted after stop, or power switch has been turned on. This is to protect the system.

Main power failure

• If a power failure occurs during operation, all operations stop.

• When the power is turned on after power failure, the operation lamp of the remote controller flashes to notify.

• When restarting the operation, push ON/OFF button again.

Fan rotation of stopped unit

• While other indoor units operate, the fan on indoor units on “stand-by” rotates to protect the machine once per approx. 1 hour for several minutes.

Protective device (High pressure switch)

The high pressure switch operate the air conditioner automatically stops when excessive load is applied to the air conditioner. If the protective device works, the operation lamp keeps lit but the operation stops. When the protective device works, “CHECK” characters in the remote controller display section flash. The protective device may work in the following cases.

Cooling

• When air inlet or outlet of the outdoor unit is closed.

• When strong wind blows continuously against air outlet of the outdoor unit.

Heating

• When much dust or dirt is excessively adhered to air filter of the indoor unit.

• When air outlet of the indoor unit is blocked.

NOTE

If the protective device works, turn off the main power switch, remove the cause, and then restart the operation.

Cooling/ heating operation of Multi system air conditioner

• In a Multi system air conditioner, cooling operation and heating operation cannot be concurrently performed in the indoor units which are installed to one outdoor system though each indoor unit can be individually controlled. If both operations have been performed at the same time, the indoor unit under COOL mode stops and [

Operation ready] on the operation part goes on. The indoor unit under HEAT mode continues the operation.

When COOL or HEAT mode is fixed by the manager of the air conditioner, other operation than the set mode is unavailable. If other operation than the set mode has been performed, [

PRE-HEAT] or [ Operation ready] on

the operation part goes on and the operation stops.

Characteristics of heating operation

• Air does not blow out immediately after start of the operation. When the indoor heat exchanger has been heated after 3 to 5 minutes passed (differs according to temperature of indoor/outdoor temperature), hot air starts blowing.

• During operation, the outdoor unit may stop when outdoor temperature becomes high.

• When other indoor unit performs heating operation during fan operation, fan operation may be stopped temporarily

to prevent discharge of hot air.

[Step]

(Prior to Installation)

Determination of extent

of installation work

Drafting of diagrams

(Installation)

Sleeve/insert installation

Indoor unit installation

Refrigerant pipe installation

(to outdoor outlet)

Drain pipe installation

Duct installation

Insulation work

Electrical work

(control wires and power wires)

Various switch settings

Outdoor unit base installation

Outdoor unit installation

Outside circulation,

refrigerant pipe installation

Gas-leak test

Vacuum suction

Addition of refrigerant

Ceiling panel installation

Test operation and adjustment

Owner’s Manual transfer

[Key Points]

Clearly determine the extent of the installation work.

Draft :

• Control wiring system diagram

• Refrigerant line system diagram

• Power wiring system diagram

Pay careful attention to the downward slope of the drain pipe. Be sure to check the name of the model in order to avoid any

installation mistakes. If the model has an installation pattern, attach the pattern to the ceiling to mark the position of the ceiling openings and to keep dust away.

Make sure that the pipe system is dry, clean, and airtight. When brazing pipes, blow out the system with nitrogen gas. Do not forget the system indications.

Pipes should have downward slope (of at least 1/100). Make sure the duct is large enough to carry the desired volume of air.

Be careful not to make any errors in the external static pressure calculations.

Be especially careful to close off all gaps where connections are made to the indoor unit, and at joints in the branching kit. Do not forget the drain pipes.

Use two-core shielded wires for the control wires, and use separate power supplies for the indoor and outdoor units.

Set the switches correctly, as indicated in the control wiring system diagram.

Make sure that the base is level. Provide for adequate air flow and service space around the outdoor

unit. Indicate the system names clearly. From outside outlet to outdoor unit.

In the final test, the system must be pressurized at 3.73MPa (38kg/ cm²G) for 24 hours with no decrease in pressure.

Use a vacuum pump with reverse flaw prevention adaptor with a large output volume and that can achieve a high level of vacuum.

Record the amount of refrigerant that was added to the system on both the outdoor unit and on the pre-test operation checklist.

Make sure that the ceiling panel is attached to the ceiling material tightly, with no gaps.

Operate the indoor units one by one, making sure that all wiring and pipes are connected correctly, and fill out the checklist.

Explain how to operate the system clearly and concisely.

KEY POINTS OF AIR CONDITIONER INSTALLATION

In order to prevent problems before they arise, carefully read (1) the Installation Manual provided with the equipment, and (2) the Owner’s Manual before installing the air conditioner.

4-1. Flow of Air Conditioner Installation Work

The procedure described above presents only the general sequence of steps; the sequence of steps may have to be altered according to the circumstances of any specific installation job.

5. REFRIGERANT PIPE INSTALLATION

5-1. Work Procedure

5-2. Three Principles of Refrigerant Pipes

Indoor unit installation

Sizing

the pipes

Preliminary

installation

Flaring

Nitrogen gas blow

Brazing

Flushing

Leak test

Vacuum

suction

Leak test

Dry

Clean

Air-

tight

Causes of Problems Preventing Problems

• Moisture (in the form of rainwater or water used during installation, for example) getting inside of the pipes

• Moisture from condensation forming or seeping into the pipes

• Oxidation inside pipes during brazing

• Dirt, dust, or foreign matter getting inside pipes

• Poor brazing

• Poor flaring

Careful

handling

of pipes

Flushing

Vacuum

suction

Nitrogen gas blow

Careful handling of pipes

Flushing

Use of suitable materials

(copper pipes, solder, etc.)

Perform basic work

of brazing carefully

Perform basic work

of flaring carefully

Leak

Dry

Not good Not good Not good

Clean Airtight

Make sure there is no moisture

inside of the pipes

Make sure there is no dirt

inside of the pipes

Make sure the refrigerant

does not leak

Moisture

Dirt

         

5-3. Selecting the Refrigerant Line Material

• Refrigerant pipes

• Material: Phosphoric deoxidized seam-less pipe

• Capacity code of outdoor unit / indoor unit

• For each indoor unit, the capacity code is determined for every capacity rank.

• For each outdoor unit, the capacity code is determined for every capacity rank. The Max. number of the

connectable indoor units and the total capacity code value of the indoor units are also determined. Against the capacity code of the outdoor unit, the total capacity codes of the connectable indoor units differ

according to the height difference between indoor units.

• When the height difference between indoor units is 15m or less: Up to 135% of capacity code of outdoor unit

• When the height difference between indoor units is 15m or more: Up to 105% of capacity code of outdoor unit

Table 1 Table 2

Indoor unit

capacity rank

007 type 009 type 012 type 015 type 018 type 024 type 027 type 030 type 036 type 048 type 056 type 072 type 096 type

Capacity code

Equivalent Equivalent

to HP to capacity

0.8 2.2 1 2.8

1.25 3.6

1.7 4.5 2 5.6

2.5 7.1 38

3.2 9 4 11.2 514 616 8 22.4

10 28

Outdoor unit model name

MMY-MAP0501

∗

MMY-MAP0601

∗

MMY-MAP0801

∗

MMY-MAP1001

∗

MMY-MAP1201

∗

MMY-AP1401

∗

MMY-AP1601

∗

MMY-AP1801

∗

MMY-AP2001

∗

MMY-AP2201

∗

MMY-AP2211

∗

MMY-AP2401

∗

MMY-AP2411

∗

MMY-AP2601

∗

Capacity code

Equivalent Equivalent

to HP to capacity

514 616

8 22.4 10 28 12 33.5 14 38.4 16 45 18 50.4 20 56

22 61.5

24 68 26 73

No. of

indoor

units

8 10 13 16 20 23 27 30 33

40 43

Outdoor unit model name

MMY-AP2801

∗

MMY-AP3001

∗

MMY-AP3201

∗

MMY-AP3211

∗

MMY-AP3401

∗

MMY-AP3411

∗

MMY-AP3601

∗

MMY-AP3611

∗

MMY-AP3801

∗

MMY-AP4001

∗

MMY-AP4201

∗

MMY-AP4401

∗

MMY-AP4601

∗

MMY-AP4801

∗

Capacity code

Equivalent Equivalent

to HP to capacity

28 78.5 30 84

32 90

34 96

36 101 38 106.5

40 112 42 118 44 123.5 46 130 48 135

Table 3

No.Piping parts

Outdoor unit

↓

T-shape branching joint

Name

Connecting pipe of outdoor unit

Selection of pipe size

1)Connecting pipe outdoor unit

Remarks

Same to connecting pipe size of outdoor unit

Model

MMY-MAP0501

∗

MMY-MAP0601

∗

MMY-MAP0801

∗

MMY-MAP1001

∗

MMY-MAP1201

∗

Gas side

Ø15.9 Ø19.1 Ø22.2 Ø22.2 Ø28.6

Liquid side

Ø9.5 Ø9.5

Ø12.7 Ø12.7 Ø12.7

2)Pipe size for connecting piping between outdoor units

Total capacity codes of outdoor

units at downstream side

Equivalent Equivalent to capacity to HP

Below 38.4 Below 14

38.4 to below 61.5 14 to below 22

61.5 to below 73.0 22 to below 26

73.0 to below 96.0 26 to below 36 Above 101.0 Above 36

Gas

side

Ø28.6 Ø28.6 Ø34.9 Ø34.9 Ø41.3

Liquid

side

Ø12.7 Ø15.9 Ø15.9 Ø19.1 Ø22.2



Balance

pipe

Ø9.5

3)Size of main pipe

Gas side

Ø15.9 Ø19.1 Ø22.2 Ø28.6 Ø28.6 Ø34.9 Ø34.9 Ø41.3

Ø41.3

∗

Liquid side

Ø9.5 Ø9.5

Ø12.7 Ø12.7 Ø15.9 Ø15.9 Ø19.1 Ø22.2

Ø22.2

∗

* Max. equivalent length of main pipe is below 70m.

Main connecting piping between of outdoor units

Main pipe

Between T-shape branching joints

T-shape joint of header unit

↓

1st branching section





Total capacity codes of all outdoor units

Equivalent Equivalent to capacity to HP

Below 16.0 Below 6

16.0 to below 22.4 6 to below 8

22.4 to below 33.5 8 to below 12

33.5 to below 38.4 12 to below 14

38.4 to below 61.5 14 to below 22

61.5 to below 73.0 22 to below 26

73.0 to below 101.0 26 to below 36

101.0 to below 130.0 36 to below 46 Above 130.0 Above 46

Pipe size differs based on total capacity code value of outdoor units at downstream side. (See Table 2.)

Pipe size differs based on capacity code of outdoor unit. (See Table 2.)



Balance pipe

No. of

indoor

units

47 48

48 48

48 48 48 48 48

1 1 1

5 5 5

5 5

5 5 5 5 5

6 6

Outdoor unit

Balance pipe

T-shape branching joint

Outdoor unit connecting piping

Main connecting piping between outdoor units

Branching pipe

Branching header

1st branching section

Indoor unit connecting pipe

Y-shape branching joint

Indoor unit connecting pipe

Follower

unit 2

Follower

unit 3

Follower

unit 1

Header unit

Indoor unit

Main piping

No.Piping parts

Branching section

↓

Branching section

Name

Branching pipe

Selection of pipe size

4)Pipe size between branching sections

Remarks

Pipe size differs based on total capacity code value of indoor units at downstream side. If the total value exceeds the capacity code of the outdoor unit, apply capacity code of the outdoor unit. (See Table 1.2.)

Total capacity codes of indoor units

at downstream side

Equivalent Equivalent

to capacity to HP

Below 7.5 Below 2.8

7.5 to below 18.0 2.8 to below 6.4

18.0 to below 34.0 6.4 to below 12.2

34.0 to below 56.5 12.2 to below 20.2

∗

56.5 to below 70.5 20.2 to below 25.2

70.5 to below 98.5 25.2 to below 35.2

98.5 to below 118.5 35.2 to below 42.2 Above 118.5 Above 42.2

Gas side

Ø12.7 Ø15.9 Ø22.2 Ø28.6 Ø34.9 Ø34.9 Ø41.3 Ø41.3

Liquid side

Ø9.5 Ø9.5

Ø12.7 Ø15.9 Ø15.9 Ø19.1 Ø22.2 Ø22.2

5)Connecting pipe size of indoor unit

Capacity rank

007 to 012 type (15m or less)

007 to 012 type (15m or more)

015 to 018 type 024 to 056 type

072 type 096 type

Gas side

Ø9.5 Ø12.7 Ø12.7 Ø15.9 Ø22.2 Ø22.2

Liquid side

Ø6.4 Ø6.4

Ø6.4

Ø9.5

Ø12.7 Ø12.7

6)Selection of branching section

Y-shape branching joint

Branching header ∗2

T-shape branching joint (For link of outdoor units)

Total capacity code of indoor units

Equivalent to capacity Equivalent to HP

Below 18.0 Below 6.4

18.0 to below 40.0 6.4 to below 14.2

*1 40.0 to below 70.5 14.2 to below 25.2

Above 70.5 Above 25.2

For 4

Below 40.0 Below 14.2

branches

40.0 to below 70.5 14.2 to below 25.2

For 8

Below 40.0 Below 14.2

branches

40.0 to below 70.5 14.2 to below 25.2

Model name

RBM-BY53E RBM-BY103E RBM-BY203E RBM-BY303E RBM-HY1043E RBM-HY2043E RBM-HY1083E RBM-HY2083E

The following 3 types of T-shape branching joint pipes are made to one set. Arrange the required quantities and combine at the local site

• Balance pipe (Corresponding dia. Ø9.5) × 1

• Pipe at liquid side (Ø9.5 to Ø22.1) × 1

• Pipe at gas side (Ø15.9 to Ø41.3) × 1

RBM-BT13E

∗1: If exceeding the main pipe size, decide the size same to main pipe size. ∗2: Up to total 6.0 of Max. capacity codes is connectable to one line after branching of

header.





Branching section

↓

Indoor unit

Branching section

Indoor unit connecting pipe

Y-shape branching joint Branching header T-shape branching joint

∗1: If exceeding the main pipe size, decide the size same to

main pipe size.

5-4. Allowable length/height difference of refrigerant piping

• System restrictions

• Allowable length and height difference of refrigerant piping

∗1 (D) is outdoor unit farthest from 1st branching, and ( j ) is indoor unit farthest from 1st branching. ∗2 If the height difference (H2) between indoor units exceeds 3m, set below 30m. ∗3 If the maximum capacity of combination of the outdoor units is 46 HP or more, the maximum equivalent length is

restricted up to 70m.

NOTE :

In case of connecting method <Ex. 2>, a large amount of refrigerant and refrigerant oil may return to the head unit. Therefore, set the T-shape joint so that oil does not enter directly.

Outdoor unit

T-shape branching joint

LA LB

Lb Lc

Main piping

1st branching section

Height difference between outdoor units H3

5 m

Height difference between outdoor units H1

50 m

D Follower unit 3

Connecting piping of outdoor unit

Follower

unit 1

Follower

unit 2

Header

unit

Main connecting piping between outdoor units Length corresponded to farthest piping

between outdoor units LO

25 m

Branching piping L2

Connecting piping of indoor unit L7

bcdea

ghi jf

Branching

header

Indoor unit

Equivalent length corresponded to farthest piping L

175 m

Equivalent length corresponded to farthest piping after 1st branching Li

65 m

Y-joint

2 Height difference between indoor units H2 30 m

<Ex. 2><Ex. 1>

Follower

unit 1

Follower

unit 2

Header

unit

Follower

unit 1

Follower

unit 2

Header

unit

GOOD NOT GOOD

Max. No. of combined outdoor units 4 units Max. cap acity of combined outdoor units 48 HP Max. No . of connected indoor units 48 units

H2 <15 135%

Max. cap acity of com bine d indoor units

>15 105%

Note 1)

Note 2)

Note 3) Note 4)

Combination of outdoor units : Header unit (1 unit) + Follower units (0 to 3 units). Header unit is the outdoor unit nearest to the connected indoor units.

Install the outdoor units in order of capacity. (Header unit > Follower unit 1 >

Follower unit 2 > Follower unit 3) Refer to outdoor unit combination table. Piping to indoor units shall be perpendicular to piping to the head outdoor unit as <Ex.1>.

Do not connect piping to indoor units in the same direction of Head outdoor unit as <Ex.2>.

Allowable value Piping section

Total extension of pipe (Liquid pipe, real length) 300 m

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

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

Real length 150 m

Farthest piping length L

Equivalent length 175 m

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

Equivalent length of farthest piping from 1st branching Li (∗1) 65 m L3 + L4 + L5 + L6 + j Equivalent length of farthest piping between outdoor units LO (∗1) 25 m LA + LB + Ld, (LA + Lb, LA + LB + Lc) Max. equivalent length of main pipi ng (∗3) 85 m L1 Max. equivalent length of outdoor unit connect i ng piping 10 m Ld, (La, Lb, Lc)

Piping length

Max. real length of indoor unit connecting piping 30 m a, b, c, d, e, f, g, h, i, j

Upper outdoor unit 50 m ——

Height between indoor and outdoor units H1

Lower outdoor unit 40 m (∗2) ——

Height between indoor units H2 30 m ——

Height difference

Height between outdoor units H3 5 m ——

Branching at

outdoor unit side

T-shape branching

joint

RBM-BT13E

Branching at indoor unit side

Branching joint

RBM-BY53E RBM-BY103E RBM-BY203E RBM-BY303E

Branch header

4 branching 8 branching

RBM-HY1043E RBM-HY1083E RBM-HY2043E RBM-HY2083E

• Solder

Because only “copper-to-copper” connections are made in the multi type air conditioning system, use the hard solder “phosphor copper solder.”

• Brazed couplings and special branches

• Use suitable parts for typical elbow couplings and socket couplings. (Consider the size, material, thickness, etc.)

• Special branches

Use deoxidized parts sold separately.

Location

Outdoors

Indoors

Time for installation

One month or more

Less than one month

Does not matter

Careful handling method

Pinch method Pinch or taping method Pinch or taping method

5-5. Careful Handling

Careful handling is the most important step in preventing moisture, dirt, and dust from getting inside of the pipes. Moisture in pipes has caused major problems in numerous instances in the past. Therefore, it is important to be as careful as possible in order to prevent problems before they occur.

Pipe delivery and storage

When pipes are delivered, care should be taken to prevent it from becoming bent or deformed, and the ends of the pipes should be capped in order to prevent dirt, mud, rain, etc., from getting inside. Build a wooden frame to hold the pipes securely, and store the pipes in the specified location.

Delivery of copper pipes without caps to a work site is not acceptable.

The ends of all pipes must be sealed. The most reliable method is the “pinch method,” but the taping method can be selected in some circumstances.

n Pinch method

Pinch the end of the copper pipe closed, and braze any opening closed.

n Taping method

Cover the end of the copper pipe with vinyl tape.

Frame for careful handling

and to prevent rolling

Careful handling on a pallet

Cap

Pipe caps

Braze here

Copper pipe

Solder

[Taping method]

Opening

Copper pipe

Vinyl tape

Flatten

Fold over

Tape again

CAUTIONS

1) Do not allow dirt or moisture inside of the pipes.

• Keep the open ends of all pipes

capped until all pipes have been connected.

• Pipe openings should face

horizontally or downwards if at all possible.

2) When passing a pipe through an

opening in a wall, always keep the end of the pipe capped.

3) Do not place pipes directly on the ground. Do not scrape pipes on the ground.

4) When deflashing (removing burrs from) a pipe, point the opening downwards so that no scraps fall inside of the pipe.

5) When installing pipes on a rainy day, always keep the ends of the pipes capped.

GOOD NOT GOOD

Dirt and moisture get inside

Cap

Pipe

Particles of the wall get inside the pipe

Cap or plastic bag

Rubber band

Wall

Cap or plastic bag

Rubber band

Ground Ground

Do not allow pipe to touch ground

Dirt gets inside of pipe

Scraps get inside of pipe

Pipe

Burrs

Deflasher

Cap or plastic bag

Rubber band

Rain gets inside of pipe

Rain

5-6. Parts of Branching Header/Joint

Branching Header : RBM-HY1043E / HY1083E / HY2043E / HY2083E Branching Joint : RBM-BY53E / BY103E / BY203E / BY303E

• Check the following parts in the package.

• For piping material and size of the refrigerant pipes, refer to the Installation Manual of the Air Conditioner.

projection

socket

Diameter of the connecting pipe

1pc

1pc each

1pc

1pc each

1pc

1pc each

1pc

1pc each

Ø15.9

Ø31.8

Ø15.9

Ø31.8

Ø9.5

Ø15.9

Ø9.5

Ø15.9

No.

RBM-HY1083ERBM-HY1043E

RBM-HY2043E

RBM-HY2083E

RBM-BY53E

RBM-BY103E

RBM-BY203E

RBM-BY303E

Branching joint liquid side

Branching header liquid side

Outlet sealed pipe at gas side Header sealed pipe at liquid side

Outlet sealed pipe at liquid side

Heat insulator (gas side/liquid side)

Branching joint gas side

Branching header gas side

NAME

MODEL

Branching Joint

Socket

Gas side

Liquid side

diameter of the connected pipe

external diameter of socket

( )

diameter of the connected pipe

external diameter of socket

Ø22.2

Ø9.5

Ø15.9

Ø22.2

Ø9.5

Ø15.9

Ø31.8

Ø28.6

Ø15.9

Ø12.7

Ø38.1

Ø22.2

Ø19.0

1pc

1pc each

1pc

1pc each

1pc

1pc each

1pc

1pc each

Ø12.7

Ø15.9

Ø9.5 Ø9.5

Ø12.7

Ø19.1

Ø22.2

Ø15.9

Ø12.7 Ø12.7

Branching Header

Socket

Gas

side

Liquid

side

Heat insulator (gas side/liquid side)

Ø 6.4 x (Ø19.1) 1pc Ø 9.5 x (Ø19.1) 1pc Ø12.7 x (Ø19.1) 1ps Ø15.9 x (Ø19.1) 2pcs Ø22.2 x (Ø19.1) 1pc

04 07 10 13 52

Ø 9.5 x (Ø38.1) 1pc Ø12.7 x (Ø38.1) 1pc Ø15.9 x (Ø38.1) 1pc Ø19.1 x (Ø38.1) 1pc Ø22.2 x (Ø38.1) 1pc Ø28.6 x (Ø38.1) 2pcs Ø34.9 x (Ø38.1) 1pc Ø41.3 x (Ø38.1) 1pc

77 76 75 74 73 71 61 62

No.

Ø15.9 x (Ø22.2) 1pc Ø19.1 x (Ø22.2) 1pc

14 18

No.

Ø 6.4 x (Ø15.9) 1pc Ø 9.5 x (Ø15.9) 1pc Ø12.7 x (Ø15.9) 2pcs

03 06 09

Ø 9.5 x (Ø28.6) 1pc Ø12.7 x (Ø28.6) 1pc Ø15.9 x (Ø28.6) 1pc Ø19.1 x (Ø28.6) 1pc Ø22.2 x (Ø28.6) 2pcs Ø34.9 x (Ø28.6) 1pc

48 49 16 20 43 58

No.

Ø28.6 x (Ø31.8) 1pc Ø34.9 x (Ø31.8) 1pc

27 59

No.

Ø 6.4 x (Ø12.7) 1pc Ø 9.5 x (Ø12.7) 2pcs Ø15.9 x (Ø12.7) 1pc

02 05 54

Ø 9.5 x (Ø19.1) 1pc Ø12.7 x (Ø19.1) 1pc Ø15.9 x (Ø19.1) 2pcs Ø22.2 x (Ø19.1) 2pcs Ø28.6 x (Ø19.1) 1pc

07 10 13 52 89

No.

Ø 9.5 x (Ø15.9) 1pc Ø12.7 x (Ø15.9) 1pc

06 09

Ø19.1 x (Ø22.2) 1pc Ø28.6 x (Ø22.2) 1pc

18 70

No.

Ø 6.4 x (Ø 9.5) 2pcs

Ø 9.5 x (Ø12.7) 1pc

Ø 9.5 x (Ø12.7) 2pcs Ø15.9 x (Ø12.7) 2pcs

05 54

No.

Ø12.7 x (Ø15.9) 1pc Ø19.1 x (Ø15.9) 1pc

09 51

No.

Ø 9.5 x (Ø15.9) 7pcs Ø12.7 x (Ø15.9) 7pcs

06 09

No.

Ø28.6 x (Ø31.8) 1pc Ø34.9 x (Ø31.8) 1pc

27 59

No.

Ø 9.5 x (Ø15.9) 2pcs Ø12.7 x (Ø15.9) 2pcs

06 09

No.

Ø28.6 x (Ø31.8) 1pc Ø34.9 x (Ø31.8) 1pc

27 59

No.

Ø 9.5 x (Ø15.9) 8pcs Ø12.7 x (Ø15.9) 8pcs

06 09

No.

Ø15.9 x (Ø22.2) 1pc Ø19.1 x (Ø22.2) 1pc Ø28.6 x (Ø22.2) 1pc

14 18 70

No.

Ø 9.5 x (Ø15.9) 4pcs Ø12.7 x (Ø15.9) 4pcs

06 09

No.

Ø15.9 x (Ø22.2) 1pc Ø19.1 x (Ø22.2) 1pc Ø28.6 x (Ø22.2) 1pc

14 18 70

Ø 6.4 x (Ø 9.5) 7pcs

Ø 6.4 x (Ø 9.5) 4pcs

Ø 6.4 x (Ø 9.5) 8pcs

Ø 9.5 x (Ø15.9) 1ps Ø12.7 x (Ø15.9) 1ps

06 09

Ø 6.4 x (Ø 9.5) 4pcs

Ø 9.5 x (Ø15.9) 1pc Ø12.7 x (Ø15.9) 1pc

(Ø15.9) 1pc (Ø15.9) 1pc

(Ø 9.5) 1pc

(Ø15.9) 3pcs (Ø15.9) 1pc

(Ø 9.5) 3pcs

(Ø15.9) 1pc (Ø15.9) 1pc

(Ø 9.5) 1pc

(Ø15.9) 3pcs (Ø15.9) 1pc

(Ø 9.5) 3pcs

06 09

NAME

MODEL

NOTE : 1. All dimensions are in millimeters. In the following tables, ( )

indicates diameter of the indicated position, and others indicate diameter of the connecting pipe.

2. Please connect pipe to the side with a projection of the socket.

( 51 , 52 , 54 , 58 , 59 , 61 , 62 , 70 , 89 : without projection)

5-7. Branching Kit Connection Method

[1] Branch joint

NOTE :

Install the branch pipes horizontally or vertically so that they branch evenly.

Install the branching joint within ± 15 degrees.

Heat insulating for pipes (Branching Joint)

• In order to prevent dripping at the place where the insulation provided with the branching kit meets the insulating material obtained on the site, butt the two types of insulation up against each other, and then wrap the seam between the two types of insulation in at least 10mm of the insulating material (in use on the site).

• Installation direction of branch pipe Install the branching pipes so that it branch either vertically or horizontally.

NOTE :

• Install the branch pipes horizontally or vertically so that they are branched evenly.

• Install the branching joint within ±15 degrees.

• On the gas-side pipe, use insulation that can

withstand heat of 120°C or higher. For the branch pipe, either use a commercially available coupling cover (for T-shape) that is at least 10mm thick, or else insulate the pipe as shown in the figure at below.

• After applying insulation as outlined above, tape the insulation in place.

Outlet (1)

Outlet (2)

Inlet

Pipe in use on the site

Socket

Pipe in use on the site

To other branching pipe or indoor unit

To outdoor unit

Gas side branch joint

Socket

Outlet (1)

Outlet (2)

Inlet

Pipe in use on the site

To other branching pipe or indoor unit

To outdoor unit

Gas/Liquid side branch joint

Socket

Pipe in use on the site

Both directions are possible.

In case of vertical installation

(Horizontal line)

(A view)

(B view)

Within ± 15

degrees

Within ± 15

degrees

Heat insulator in package

Branching joint

150

Butt together

Butt together Heat insulator for piping (in use on the site)

Heat insulator (in use on the site) by 10mm or more thickness.

Heat insulator for piping (in use on the site)

Heat insulator (in use on the site)

Taping (in use on the site)

[2] Branch header

Branching Header

Select and install the socket that matches the diameter of a pipe to be connected to the indoor unit.

<Gas-side branch header>

<Liquid-side branch header>

• If the number of indoor units to be connected is fewer than the maximum number of units that can be connected to the branch header, attach a sealed pipe to the unused connectors.

<Gas-side branch header>

<Liquid-side branch header>

• Install the branch header so that it branches horizontally. It cannot be used in a vertical position.

<Gas-side>

<Liquid-side>

When arranging the branching header at the liquid side, attach a header sealed pipe on the sealing side of the header as shown in the fiqure at below.

Be sure to install the branch pipe downward. Horizontal viewed from D point should be within ± 10 degrees same as view B.

• Supporting branching header After applying the insulation, set the hanging metals

as support. (in use on the site).

NOTE :

1. Install the branching header so that it branches

horizontally. It cannot be used in a vertical position.

2. Do not use T-type pipe for the branching section.

CAUTION

1. On the inlet side of a Y-type branch joint or branch header, allow for at least 300mm of straight pipe.

2. A Y-type branch joint can be installed so that it branches either vertically or horizontally; if branching horizontally, it should be within an angle of ±15°.

3. A branch header should be installed so that it branches horizontally.

4. Do not use T-type branch joints.

CAUTION

In the multi air conditioning system, because the refrigerant pipes congregate at the rooftop pipeshaft outlet in the vertical pipeshaft, it is necessary to attach “labels” to each pipe in order to make clear to which system a given pipe belongs so as to prevent pipes from being connected incorrectly.

Pipe in use on the site

To outdoor unit

To indoor unit

Socket

Pipe in use on the site

To outdoor unit

To indoor unit

Socket

Pipe in use on the site

Outlet sealed pipe (Provided with branch header)

(Horizontal line)

(A view)

(B view)

Within ± 15

degrees

Within ± 10

degrees

(Horizontal line)

(C view)

Within ± 15

degrees

Pipe in use on the site

Inlet socket

Header sealed pipe

(D view) Sealing side

Branching Header

Within ± 10

degrees

[3] T-shape branching joint (For connection of outdoor unit)

• Be sure to perform heat insulating at liquid side and gas side, and balancing pipes separately. (Heat insulator for balancing is not provided.)

• Use heat-resisting heat insulator (120°C or more) for pipes at gas side.

• To insulate heat of the branching pipes, use a joint cover (For T-shape) available on the market that is with 10mm or more thickness, or one applied with machining as shown in the figure.

• Seal the branching piping completely without clearance to prevent dewing or falling of water drops.

RBM-BT13E

Please read "Safety Cautions" described in the Installation Manual of the Air Conditioner.

• Check the following parts in the package.

• For piping material and size of the refrigerant

pipes, refer to the Installation Manual of the Air Conditioner.

Parts

NOTE :

All dimentions are in millimeters. In the following tables, ( ) indicates diameter of the

indicated position, and others indicate diameter of the connected pipe.

To other branching pipe or outdoor unit

To outdoor unit

To other branching pipe or outdoor unit

Connect balancing pipe directly.

Pipe in use on the site

• when combining two units, connect directly between outdoor units.

Pipe in use on the site

Branching pipe for balancing pipe (Provided)

Follow unit

Header unit

Heat insulating pipe for piping

Seal with vinyl tape

Seal the joint with urethane foaming agent, etc.

Heal insulator

Cut the heat insulator at the right angle

Heat insulating pipe for piping

90 degrees

more then 100mm

ØD

1 pc

Ø38.1

Ø22.2

Ø9.5

Ø22.2

Ø9.5

Diameter of the connected pipe

(external diameter of soket)

Gas side

Liquid side

For balancing pipe

RBM-BT13E (T-shape branching joint)

Branching joint Socket

DiameterNo.

Ø34.9 x (Ø38.1) 1pc Ø41.3 x (Ø38.1) 1pc Ø28.6 x (Ø38.1) 2pcs Ø22.2 x (Ø38.1) 2pcs Ø19.0 x (Ø38.1) 1pc

61 62 71 73 74

Ø15.9 x (Ø22.2) 2pcs Ø19.1 x (Ø22.2) 1pc Ø12.7 x (Ø22.2) 2pcs Ø 9.5 x (Ø22.2) 1pc

14 18 85 86

• Installation of branching pipes to gas/liquid sides.

Follower

outdoor unit

Header

outdoor unit

Follower

outdoor unit

Header

outdoor unit

Do not install branch pipe in this direction

*Correct*

*Incorrect*

To other branching pipe or branching section of main pipe

To outdoor unit

To other branching pipe or outdoor unit

Socket at gas/liquid side (Provided)

Pipe in use on the site

Socket at gas/liquid side (Provided)

Branching pipe at gas/liquid side (Provided)

Socket at gas/liquid side (Provided)

Pipe in use on the site

To other branching pipe or branching section of main pipe

To outdoor unit

To other branching pipe or outdoor unit

Use the attached socket at gas/liquid sides along with the selected pipe size. (Figure shows a connecting example.)

∗3 Y-shape branching joint

∗4 4-branching header ∗4

8-branching header

∗5

T-shape branching joint (For connecting outdoor unit)

Model name RBM-BY53E RBM-BY103E RBM-BY203E RBM-BY303E RBM-HY1043E RBM-HY2043E RBM-HY1083E RBM-HY2083E

RBM-BT13E

Total capacity codes of indoor unit ∗1, 2 External view

Below 6.4

6.4 or more and below 14.2

14.2 or more and below 25.2

25.2 or more Below 14.2

Max. 4 branching

14.2 or more and below 25.2 Below 14.2

Max. 8 branching

14.2 or more and below 25.2 1 set of 3 types of T-shape joint pipes as described below.

The required quantity is arranged and they are combined at site.

Connecting pipe

Balancing pipe Piping at liquid side Piping at gas side

Corresponding dia

Ø9.5

Ø9.5 to Ø22.2

Ø15.9 to Ø41.3

Q’ty

1 1 1

5-8. External Dimensions of Branch Connectors

(Outline drawings are shown on the following pages.)

1 This code is determined by the capacity rank.

2 If the total of the capacity codes for the indoor units exceeds the capacity codes of the outdoor units, use the total

outdoor capacity code.

3 When using Y-shape branching joint for 1st branching, select according to capacity code of outdoor unit.

4 A maximum capacity code total of 6.0 can be connected to the system downstream of a header branch.

5 If an outdoor unit with a capacity code of at least 12 but less than 26 is connected on the first branch, use RBM-HY2043E

or RBM-HY2083E. Furthermore, an outdoor unit with a capacity code of 26 or higher cannot be used on the first branch.

5-9. Nitrogen Gas Blow Method (During Brazing)

• If nitrogen gas is not passed through the pipes during brazing, a film of oxidized material will form on the inner surfaces of the pipes. The presence of a such a film in the system will adversely affect the operation of the valves and compressor in the refrigerant system, and will prevent the system from operating normally.

• In order to prevent this from occurring, nitrogen gas is passed through the pipes while brazing is in progress. This process of replacing the air in the pipes with nitrogen is called the “nitrogen gas blow.”

This is the basic method that is used for brazing work.

CAUTION

1. Nitrogen gas must be used. (Oxygen, carbon dioxide, and fluorocarbons cannot be used.)

2. Always be sure to use a pressure-reducing valve.

Piping at site

Reducing valve

Brazing position

Copper pipe Ø6.4

Taping

Valve

Pressure tight hose

Nitrogen

gas bomb

Nitrogen gas bomb

Hose

Piping

Outside

Nominal dia.

Max. interval (m)

5-10. Brazing Work

1. Brazing work should be performed downwards

or sideways. Avoid brazing upwards (in order to avoid incomplete brazing). (Recommendation)

2. Always used the specified piping materials for

liquid pipes and gas pipes, and make sure that they are installed in the proper direction and at the proper angle.

3. The “nitrogen gas blow” method should be used

when brazing.

CAUTIONS

1. Pay attention to fire prevention concerns. (Take preventative measures in the area where brazing work is to

be performed, such as keeping a fire extinguisher or water handy.)

2. Be careful not to burn yourself.

3. Make sure that any gaps between pipes and couplings are appropriate. (Do not miss brazing any joints.)

4. Make sure that pipes are adequately supported.

• The following table provides basic guidelines for the interval between supports for horizontal copper pipe.

Interval between supports for copper pipe

• Avoid securing copper pipes with metal brackets directly.

* Gas brazing of refrigerant pipes must be performed by personnel qualified to do so under local ordinances.

Minmum wall thickness for R410A application

Brazing material

Lateral direction

Brazing material

(Direction downward) (Direction upward)

(Recommended brazing)

Coupling size of brazed pipe

Standard outer dia. of

connected copper pipe

6.35

9.52

12.70

15.88

19.05

22.22

28.58

34.92

38.10

41.28

External size Internal size

Standard outer dia. (Allowable difference)

6.35 (±0.03) 6.45 ( )

9.52 (±0.03) 9.62 ( )

12.70 (±0.03) 12.81 ( )

15.88 (±0.03) 16.00 ( )

19.05 (±0.03) 19.19 ( )

22.22 (±0.03) 22.36 ( )

28.58 (±0.04) 28.75 ( )

34.90 (±0.04) 35.11 ( )

38.10 (±0.05) 38.31 ( )

41.28 (±0.05) 41.50 ( )

Min. depth

of insertion

76 87 98

98 11 10 11 10 13 12 14 13 15 14 15 14

Oval value

0.06 or less

0.08 or less

0.10 or less

0.13 or less

0.15 or less

0.16 or less

0.20 or less

0.25 or less

0.27 or less

0.28 or less

Min. thickness

of coupling

0.50

0.60

0.70

0.80

0.82

1.00

1.20

1.26

1.35

+0.04

–0.02

+0.04

–0.02

+0.04

–0.02

+0.04

–0.02

+0.03

–0.03

+0.03

–0.03

+0.06

–0.02

+0.04

–0.04

+0.08

–0.02

+0.08

–0.02

Connected section

(Unit: mm)

Connected section

External size Internal size

20 or less 25 to 40

1.0 1.5

Soft (Coil)

¡ ¡ ¡ ¡

NG NG NG NG NG

Hard or Half hard

¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡

OD (Inch)

1/4 3/8 1/2 5/8 3/4 7/8

1.1/8

1.3/8

1.5/8

OD (mm)

6.35

9.52

12.70

15.88

19.05

22.20

28.58

34.92

41.28

Minium wall thickness

0.80

1.00

1.10

1.25

ØC

ØF

Work procedure

Straighten the coiled copper pipe.

Key point

Uncoil the pipe.

(Reason)

• It is difficult to cut the coiled pipe correctly, which increases the chance of failure.

Cut the pipe with the pipe cutter.

Use the reamer to remove burrs from the cut surface of the pipe.

Clear out the inside of the pipe by tapping on the end with a screwdriver.

Insert the flare nut.

1. Position the blade of the cutter so that it will cut the pipe at a perpendicular angle.

2. Rotate the pipe cutter to the left to cut the pipe.

3. Move the pipe cutter slowly.

1 . Keep the opening of the pipe

facing downwards.

2. Be careful not to scratch the inner surface of the pipe.

Make sure that all scraps of metal are out of the tube by lightly tapping on the tube while the opening is pointing down.

• The cut surface will be at an angle.

• The cutter will bite too tightly.

• The copper pipe will be

deformed.

• Scraps will get inside of the pipe.

• A gas leak could result.

• Metal scraps in the tube can

damage the compressor.

• If the scraps adhere to the flared region, a gas leak may result.

Be certain to insert the flare nut before beginning the flare process.

• The flare nut will not fit inside the copper pipe after the flare process.

5-11. Flare Processing

Flare processing procedure

Parts and material : Copper pipe, flare nut. Flare nut shallbe of attached on the indoor unit or R410A exclusive. Tools : Flare tool (“Rigid” type), reamer, pipe cutter

Pipe

Burr

Deburring

Work procedure

Attach the (“Rigid”) flare tool to the copper pipe.

Key point

1. Make sure that the inner surfaces of the flare tool are clean.

2. Determine the dimensions of the copper pipe in accordance with the flare tool.

Align the punch. (Align the arrow with the line adjacent to the next hole.)

Flare the pipe.

Remove the flare tool and check the flared surface.

Align the arrow on the punch with the prescribed position on the flare tool.

Slowly and carefully turn the flare tool handle while it clicks, until it turns freely. Turn the handle to the left and raise it to the top.

Check list :

• Is the inner surface of the flared portion equal in width and shiny?

• Is the thickness of the flared portion equal?

• Is the flared portion of a suitable size?

• The pipe will not be flared fully.

• The extended portion of the pipe (the cone-shaped portion)

will be scratched.

• If the “A” dimension is small, the flared contact surface is smaller and a gas leak becomes more likely.

(Reason)

• The copper pipe will slip out while the flaring process is in progress.

• The flared dimensions vary.

Dimensions to end of copper tube when flared with one tool surface

• Projection margin in flaring : A (Unit : mm)

Rigid (Clutch type)

Imperial (Wing nut type)

Outer dia. of

copper pipe

6.4

9.5

12.7

15.9

R410A tool used

R410A R22 0 t o 0.5 (Same as left) 0 t o 0.5 (Same as left) 0 t o 0.5 (Same as left) 0 t o 0.5 (Same as left)

Conventional tool used

R410A R22

1.0 to 1.5 0.5 to 1.0

Outer dia. of copper pipe

6.4

9.5

12.7

15.9

R410A R22

1.5 to 2.0 1.0 to 1.5

2.0 to 2.5 1.5 to 2.0

Flare tool

Copper pipe

45˚

If the handle is not raised to the top, the flare tool will scratch the extended portion of the pipe (the cone-shaped portion).

• Extruding margin of copper pipe with flare machining : A (Unit: mm)

Copper pipe outer dia.

9.5

12.7

15.9

13.2

16.6

19.7

+0.0 –0.4

5-12. Flushing

The flushing process uses gas pressure to remove foreign matter from the inside of pipes.

Three major effects

(1) Removes oxidation that formed inside of the pipe during brazing as a result of an inadequate “nitrogen gas

blow” procedure. (2) Removes foreign matter and moisture that has gotten inside of pipes due to improper handling. (3) Checks the connections in the pipe system between the indoor unit and the outdoor unit.

[Example work procedure]

1. Install a pressure reducing valve on a nitrogen cylinder. (Fluorocarbon gases and carbon dioxide carry a risk

of promoting condensation, while oxygen causes explosion.)

2. Connect the pressure reducing valve to a gauge manifold and then to the gas-side pipe and the liquid-side

pipe on the outdoor unit.

3. On the indoor unit side, plug all gas-side pipes except those for the

indoor units that are to be flushed.

4. Open the source valve on the nitrogen cylinder and increase the

pressure on the secondary side of the pressure reducing valve until it reaches 0.5MPa (5kg/cm2G), and then open the valve on the gauge manifold connected to the gas-side pipe.

5. Flushing

Press down on the end of the indoor-side gas pipe with your palm.

When the pressure becomes so great that you can no longer hold it against the end of the pipe, remove your hand from the pipe. (This is the first flush.) Press down against the end with your hand again.

Flush the pipe a second time. (When flushing, place a piece of gauze, etc., on the end of the pipe, and then check the gauze for debris or moisture. Repeat the flushing process until nothing more comes out of the pipe.)

6. Close the gauge manifold valve, and repeat the above process for

next indoor unit (No. 2 to No. N). Close the gauge manifold valve, open the valve on the gauge manifold that is connected to the liquidside pipe to allow the nitrogen to flow, and flush that liquid-side pipe.

Nitrogen gas bomb

Indoor unit

Ø6.4 copper pipe

Diff. size union

Gauge manifold valve

VLV

Source valve

Reducing valve

N21

Plug (Brass)

Flare nut

Copper pipe

Source valve

1st side

2nd side

0.5MPa (5kg/cm²G)

Nitrogen

gas

Reducing valve

Hand

Pressure

0.5MPa (5kg/cm²G)

5-13. Pipe Connections to the Indoor Unit

Tightening the flare nut with a torque wrench

* Avoid initially tightening the nut with a wrench. * When tightening a 6.4mm-diameter pipe, tighten the nut lightly with a wrench, and then tighten the nut about

90° to 120° (1.5 to 2 corners of the nut) with a torque wrench.

∗ : R410A torque wrench required.

Connecting pipe outer dia.

(mm)

Ø6.4 Ø9.5

Ø12.7∗ Ø15.9∗

Tightening torque

(N•m)

14 to 18 (1.4 to 1.8 kgf•m) 34 to 42 (3.4 to 4.2 kgf•m) 50 to 62 (5.0 to 6.2 kgf•m) 68 to 82 (6.8 to 8.2 kgf•m)

1. Once you remove the flare nut from the pipe on

the indoor unit (always use a torque wrench), a small amount of gas will escape, but this is simply nitrogen gas with atmospheric pressure that was sealed inside to prevent corrosion, and does not indicate a problem.

2. Flare the pipe according to the procedure

described previously.

3. Centering

Center the pipes be seating the tapered portion of the half union in the flared portion of the pipe.

4. Tightening the flare nut

First hand-tighten the flare nut as much as possible, and then use a torque wrench to tighten the nut completely.

Center

Tapered portion

Flare nut

Flared portion

Brazing union (half union)

Turn flare nut with a wrench

Secure half union in place with a wrench

Connecting pipe

outer dia. (mm)

Ø6.4 Ø9.5

Ø12.7 Ø15.9

5-14. Pipe Connection to the Outdoor Unit

1. The refrigerant pipe connection is inside of the outdoor unit. Remove the front panel and the pipe/wiring

panel. (Nine M5 screws)

• There is one hook on the left and right sides of the front panel. Lift the front panel to release these hooks.

2. The pipe can exit the outdoor unit from the front or from

the bottom.

3. When exiting the pipe from the front of the unit, route the

pipe out of the unit through the pipe/wiring panel, and, in order to facilitate servicing of the unit in the future, maintain clearance of at least 500mm between this pipe and the main pipe connecting the outdoor unit to the indoor unit. (If it should ever be necessary to replace the compressor, at least 500mm of space will be needed.)

4. When exiting the pipe out the bottom of the unit, remove

the knockout in the bottom panel of the outdoor unit and route the pipe out of the unit through this opening. Route the pipe to the left, right or rear. Route the pipe no more than 4m below the balance pipe.

5. Use the pipe provided for the gas-side pipe connection.

Remove the L-shaped pipe that is connected to the gasside valve and then connect the gas-side pipe. When routing the pipe out of the front of the unit, cut the pipe to length in accordance with the position of the pipe panel and then direct it forwards with the elbow piece.

REQUIREMENTS

1. In order to prevent oxidation inside of the pipe, always pass nitrogen through the pipe during brazing.

2. Use clean, new pipes for the refrigerant pipes. Handle the pipes carefully to keep moisture and dirt from getting inside of the pipes.

3. Always use a torque wrench to loosen and tighten flare nuts. It is not possible to tighten the nut adequately with a single wrench. Tighten the nut with the torque indicated in the table below.

500mm

or more

Hook

Front panel

Piping/wiring panel

Drawing out forward

(Left piping)

(Right piping)

(Rear piping)

(Right piping)

Drawing out downward

Tightening torque

(N•m)

14 to 18 (1.4 to 1.8 kgf•m) 34 to 42 (3.4 to 4.2 kgf•m) 50 to 62 (5.0 to 6.2 kgf•m)

68 to 82 (6.8 to 8.2kgf•m)

Packed valve of gas side

Ball valve of gas side

Packed valve of liquid side

Packed valve of balance pipe

Packed valve of liquid side

Packed valve of balance pipe

(MMY-MAP0801

, MAP1001*, MAP1201*)(MMY-MAP0501*, MAP0601*)

+ 151 hidden pages