Panasonic U-96MF1U9, U-96MF1U9E, U-72MF1U9, U-72MF1U9E User Manual

Download

U-72MF1U9

Order No. TD831158-11CE

3WAY VRF System

U-72MF1U9E

* U-96MF1U9 U-96MF1U9E

Model No. Outdoor Unit

Model Name

Refrigerant R410A is used in the outdoor units. * Salt-Air Damage Resistant Specifications.

Indoor Units

Class 24 36 48 54

4-Way Cassette

4-Way Cassette 60×60

U-72MF1U9 U-72MF1U9E* U-96MF1U9E*

7 9 12 15 18

9672Class

U-96MF1U9

S-12MY1U6 S-18MY1U6

Section

S-24MU1U6 S-36MU1U6S-12MU1U6 S-18MU1U6

1-Way Cassette

Low Silhouette Ducted

Slim Low Static Ducted

High Static Pressure

Ducted

Ceiling

Wall Mounted

Floor Standing

Concealed Floor

Standing

** Necessary to install the External Electronic Expansion Valve Kit (Optional:CZ-P56SVK1U)

85464869258002

S-07MD1U6 S-09MD1U6 S-12MD1U6

S-07MF1U6 S-09MF1U6 S-12MF1U6 S-15MF1U6 S-18MF1U6

S-07MM1U6 S-09MM1U6 S-12MM1U6

S-12MT1U6 S-18MT1U6 S-24MT1U6

S-07MK1U6 S-09MK1U6 S-12MK1U6

S-07MP1U6 S-09MP1U6 S-12MP1U6 S-15MP1U6 S-18MP1U6 S-24MP1U6

S-07MR1U6 S-09MR1U6 S-12MR1U6 S-15MR1U6 S-18MR1U6 S-24MR1U6

S-15MM1U6 S-18MM1U6

S-18MK1U6

S-19MS1U6**S-24MK1U6

S-24MF1U6

REFERENCE NO.

S-36MF1U6 S-48MF1U6

S-36ME1U6 S-48ME1U6

TD831158-02

S-54MF1U6

IMPORTANT! Please Read Before Starting

This air conditioning system meets strict safety and operating standards. As the installer or service person, it is an important part of your job to install or service the system so it operates safely and efficiently.

For safe installation and trouble-free operation, you must:

Carefully read this instruction booklet before beginning. Follow each installation or repair step exactly as shown. Observe all local, state, and national electrical codes. Pay close attention to all warning and caution notices

given in this manual.

This symbol refers to a hazard or

WARNING

CAUTION

If Necessary, Get Help

These instructions are all you need for most installation sites and maintenance conditions. If you require help for a special problem, contact our sales/service outlet or your certified dealer for additional instructions.

In Case of Improper Installation

The manufacturer shall in no way be responsible for improper installation or maintenance service, including failure to follow the instructions in this document.

SPECIAL PRECAUTIONS

WARNING

Do not supply power to the unit until all wiring and tubing • are completed or reconnected and checked.

Highly dangerous electrical voltages are used in this • system. Carefully refer to the wiring diagram and these instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death.

•

Ground the unit following local electrical codes. Connect all wiring tightly. Loose wiring may cause •

overheating at connection points and a possible fire hazard.

To prevent possible hazards from insulation failure, • the unit must be grounded.

When Transporting

Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or

When Wiring

ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH. ONLY A QUALIFIED, EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM.

unsafe practice which can result in severe personal injury or death.

This symbol refers to a hazard or unsafe practice which can result in personal injury or product or property damage.

thin aluminum fins on the air conditioner can cut your fingers.

When Installing…

Select an installation location which is rigid and strong enough to support or hold the unit, and select a location for easy maintenance.

…In a Room

Properly insulate any tubing run inside a room to prevent “sweating” that can cause dripping and water damage to

walls and floors.

Keep the fire alarm and the air

CAUTION

…In Moist or Uneven Locations

Use a raised concrete pad or concrete blocks to provide a solid, level foundation for the outdoor unit. This prevents water damage and abnormal vibration.

…In an Area with High Winds

Securely anchor the outdoor unit down with bolts and a metal frame. Provide a suitable air baffle.

…In a Snowy Area (for Heat Pump-type Systems)

Install the outdoor unit on a raised platform that is higher than drifting snow. Provide snow vents.

outlet at least 5 feet away from the unit.

When Connecting Refrigerant Tubing

Ventilate the room well, in the event that is refrigerant • gas leaks during the installation. Be careful not to allow contact of the refrigerant gas with a flame as this will cause the generation of poisonous gas.

Keep all tubing runs as short as possible.• Use the flare method for connecting tubing.• Apply refrigerant lubricant to the matching surfaces of •

the flare and union tubes before connecting them, then tighten the nut with a torque wrench for a leak-free connection.

Check carefully for leaks before starting the test run.•

When performing piping work do • not mix air except for specified refrigerant (R410A) in refrigeration cycle. It causes capacity down, and risk of explosion and injury due to high tension inside the

WARNING

Do not leak refrigerant while piping work for an • installation or re-installation, and while repairing refrigeration parts. Handle liquid refrigerant carefully as it may cause

frostbite.

refrigerant cycle. Refrigerant gas leakage may • cause fire. Do not add or replace refrigerant •

other than specified type. It may cause product damage, burst and injury etc.

When Servicing

Turn the power OFF at the main power box (mains) • before opening the unit to check or repair electrical parts and wiring.

Keep your fingers and clothing away from any moving • parts.

Clean up the site after you finish, remembering to check • that no metal scraps or bits of wiring have been left inside the unit being serviced.

WAR NI NG

Do not clean inside the indoor and • outdoor units by users. Engage authorized dealer or specialist for cleaning.

In case of malfunction of this • appliance, do not repair by yourself. Contact to the sales dealer or service dealer for a repair.

Others

CAUTION

Do not touch the air inlet or the

• sharp aluminum fins of the outdoor unit. You may get injured. Ventilate any enclosed areas when • installing or testing the refrigeration system. Escaped refrigerant gas, on contact with fire or heat, can produce dangerously toxic gas.

Confirm after installation that no • refrigerant gas is leaking. If the gas comes in contact with a burning stove, gas water heater, electric room heater or other heat source, it can cause the generation of poisonous gas.

Do not touch the air inlet or the

• sharp aluminum fins of the outdoor unit. You may get injured. Do not sit or step on the unit, • you may fall down accidentally.

Do not stick any object into the • FAN CASE. You may be injured and the unit may be damaged.

Check of Density 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 density 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 imposed to protect the ozone layer. However, since it contains more than air, it poses the risk of suffocation if its density should rise excessively. Suffocation from leakage of refrigerant is almost non-existent. With the recent increase in the number of high density 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 to conventional individual air conditioners. If a single unit of the multi air 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 density does not reach the limit (and in the event of an emergency, measures can be made before injury can occur).

ASHRAE and the International Mechanical Code of the ICC as well as CSA provide guidance and define safeguards related to the use of refrigerants, all of which define a Refrigerant Concentration Level (RCL) of 25 pounds per 1,000 cubic feet for R410A refrigerant. For additional guidance and precautions related to refrigerant safety, please refer to the following documents:

International Mechanical Code 2009 (IMC-2009) (or more recently revised) ASHRAE 15 ASHRAE 34

Precautions for Installation Using New Refrigerant

1. Care regarding tubing

1-1. Process tubing

Material: Use C1220 phosphorous deoxidized copper specified in JIS H3300 “Copper and Copper Alloy Seamless Pipes and Tubes.” For tubes of ø7/8" (ø22.22 mm) or larger, use C1220 T-1/2H material or H material, and do not bend the tubes.

Tubing size: Be sure to use the sizes indicated in the table below.

Use a tube cutter when cutting the tubing, and be sure to remove any flash. This also applies to distribution joints (optional).

When bending tubing, use a bending radius that is 4 times the outer diameter of the tubing or larger.

Use sufficient care in handling the tubing. Seal the tubing ends with caps or tape to

Copper tube

CAUTION

Outer diameter 1/4 (6.35) 3/8 (9.52) 1/2 (12.7) 5/8 (15.88) 3/4 (19.05)

Wall thickness 1/32 (0.8) 1/32 (0.8) 1/32 (0.8) 5/128 (1.0)

Material

Outer diameter

Wall thickness

prevent dirt, moisture, or other foreign substances from entering. These substances can result in system malfunction.

Unit: in. (mm)

OMaterial

over 5/128 (1.0)

Unit: in. (mm)

1/2 H, H

7/8 (22.22) 1-1/8 (28.58) 1-3/8 (34.92) 1-5/8 (41.28)

5/128 (1.0) 5/128 (1.0) 3/64 (1.1) over

3/64 (1.20)

1-2.

Prevent impurities including water, dust and oxide from entering the tubing. Impurities can cause R410A refrigerant deterioration and compressor defects. Due to the features of the refrigerant and refrigerating machine oil, the prevention of water and other impurities becomes more important than ever.

2. Be sure to recharge the refrigerant only in liquid form.

2-1.

Since R410A is a non-azeotrope, recharging the refrigerant in gas form can lower performance and cause defects in the unit.

2-2. nce decreases when gas leaks, collect the remaining

Since refrigerant composition changes and performa refrigerant and recharge the required total amount of new refrigerant after fixing the leak.

3. Different tools required

3-1.

Tool specifications have been changed due to the characteristics of R410A. Some tools for R22- and R407C-type refrigerant systems cannot be used.

R407C tools

New

Item

Manifold gauge Yes No Types of refrigerant, refrigerating machine

Charge hose Yes

Vacuum pump Use a conventional vacuum pump if it is equipped

Leak detector Leak detectors for CFC and HCFC that

Flaring oil For systems that use R22, apply mineral oil (Suniso oil)

* Using tools for R22 and R407C and new tools for R410A together can cause defects.

compatible

tool?

with R410A?

Yes

Yes No

Yes

oil, and pressure gauge are different.

To resist higher pressure, material must be changed.

with a check valve. If it has no check valve, purchase and attach a vacuum pump adapter.

react to chlorine do not function because R410A contains no chlorine. Leak detector for HFC134a can be used for R410A.

to the flare nuts on the tubing to prevent refrigerant leakage. For machines that use R407C or R410A, apply synthetic oil (ether oil) to the flare nuts.

Remarks

Manifold gauge

Vacuum pump

Outlet Inlet

iii

3-2. Use R410A exclusive cylinder only.

New refrigerant R410A cannot be used for earlier models

1. Compressor specifications are different.

If recharging a R22 or R407C compressor with R410A, durability will significantly decrease since some of the materials used for compressor parts are different.

2. Existing tubing cannot be used (especially R22).

Completely cleaning out residual refrigerating

machine oil is impossible, even by flushing.

Val ve

Single-outlet valve

(with siphon tube) Liquid refrigerant should be recharged with the cylinder standing on end as shown.

Liquid

3. Refrigerating machine oil differs (R22).

Since R22 refrigerating machine oil is mineral oil, it does not dissolve in R410A. Therefore, refrigerating machine oil discharged from the compressor can cause compressor damage.

R22 refrigerating machine oil Mineral oil (Suniso oil)

R407C refrigerating machine oil Synthetic fluid (ether oil)

R410A refrigerating machine oil Synthetic fluid (ether oil)

Section 1: OUTLINE OF 3WAY VRF SYSTEM ......................................................................

Line-up ............................................................................................................

1. 1-2

Features of 3WAY VRF SYSTEM ....................................................................

2. 1-4

Salt-Air Damage Resistant Specifications .......................................................

3. 1-7

Section 2: DESIGN OF 3WAY VRF SYSTEM ........................................................................

Model Selecting and Capacity Calculator .......................................................

1. 2-2

System Design .............................................................................................

2. 2-18

3. 2-24

Electrical Wiring ............................................................................................

4. 2-32

Installation Instructions .................................................................................

5. 2-40HOW TO PROCESS TUBING ......................................................................

6. 2-44AIR PURGING ..............................................................................................

7. 2-47Optional Parts ...............................................................................................

Section 3: Control of 3WAY VRF SYSTEM ...........................................................................

Main Operating Functions

1. Wireless Remote Controller

2. Timer Remote Controller

3. Simplified Remote Controller

4. System Controller

5. Schedule Timer

6. Intelligent Controller (CZ-256ESMC1U)

7. Communication Adaptor (CZ-CFUNC1U)

8. Remote Sensor

9. LonWorks Interface (CZ-CLNC1U)

10.

Refer to the 2WAY VRF SYSTEM TECHNICAL DATA (TD831157)

Section 4: 3WAY VRF SYSTEM UNIT SPECIFICATIONS .....................................................

Outdoor Unit ..................................................................................................

4-Way Cassette Type (U1 Type)

4-Way Cassette 60×60 Type (Y1 Type)

1-Way Cassette Type (D1 Type)

Low Silhouette Ducted Type (F1 Type)

Slim Low Static Ducted Type (M1 Type)

High Static Pressure Ducted Type (E1 Type)

Ceiling Type (T1 Type)

Wall Mounted Type (K1 Type)

10.

Floor Standing Type (P1 Type)

11. Concealed Floor Standing Type (R1 Type)

12. Intaking Fresh Air of 4-Way Casstte Type and Slim Low Static Ducted Type

Refer to the 2WAY VRF SYSTEM TECHNICAL DATA (TD831157)

Section 5: TEST RUN .............................................................................................................

Section 6: ELECTRICAL DATA ..............................................................................................

Section 7: PCB AND FUNCTIONS ........................................................................................

Section 8: CAPACITY TABLE ................................................................................................

1. 5-2

Preparing for Test Run ....................................................................................

2. 5-3

Test Run Procedure ........................................................................................

3. 5-4

Main Outdoor Unit PCB Setting ......................................................................

4. 5-6

Auto Address Setting ......................................................................................

5. 5-12

Remote Controller Test Run Settings ...........................................................

6. 5-12

Caution for Pump Down ................................................................................

7. 5-13

Meaning of Alarm Messages ........................................................................

1. 6-2

Outdoor Unit ...................................................................................................

Indoor Unit

Refer to the 2WAY VRF SYSTEM TECHNICAL DATA (TD831157)

1. 7-2

Outdoor Unit Control PCB ...............................................................................

Indoor Unit Control PCB Switches and Functions

Refer to the 2WAY VRF SYSTEM TECHNICAL DATA (TD831157)

1. 8-2

Capacity Ratio of Outdoor Unit ......................................................................

2. 8-10

Cooling Capacity of Indoor Unit ....................................................................

1-1

2-1

3-1

4-1

4-3

5-1

6-1

7-1

8-1

Outline of 3WAY VRF SYSTEM

Contents

1. OUTLINE OF 3WAY VRF SYSTEM

1. Line-up ............................................................................................................................... 1-2

. Features of 3WAY VRF SYSTEM .......................................................................................

3. Salt-Air Damage Resistant Specifications .......................................................................

1-4

1-7

1 - 1

Outline of 3WAY VRF SYSTEM

1. Line-up

Indoor units

Type 9 191815127 3624 48 54

4-Way Cassette

(U1 Type)

4-Way Cassette

60 X 60 (Y1 Type)

1-Way Cassette

(D1 Type)

Low Silhouette Ducted (F1 Type)

S-07MD1U6 S-09MD1U6 S-12MD1U6

S-07MF1U6 S-12MF1U6 S-15MF1U6 S-18MF1U6S-09MF1U6 S-24MF1U6

S-12MU1U6 S-18MU1U6

S-12MY1U6 S-18MY1U6

S-24MU1U6 S-36MU1U6

S-36MF1U6 S-48MF1U6 S-54MF1U6

Slim Low Static Ducted (M1 Type)

High Static Pressure Ducted (E1 Type)

Ceiling

(T1 Type)

Wall Mounted

(K1 Type)

Floor Standing

(P1 Type)

Concealed Floor Standing (R1 Type)

S-07MM1U6 S-12MM1U6 S-15MM1U6 S-18MM1U6S-09MM1U6

S-18MT1U6S-12MT1U6 S-24MT1U6

S-07MK1U6 S-09MK1U6 S-12MK1U6

S-07MP1U6 S-12MP1U6 S-15MP1U6 S-18MP1U6S-09MP1U6 S-24MP1U6

S-07MR1U6 S-12MR1U6 S-15MR1U6 S-18MR1U6S-09MR1U6 S-24MR1U6

S-19MS1U6

S-24MK1U6S-18MK1U6

S-36ME1U6

S-48ME1U6

* Necessary to install the External Electronic Expansion Valve Kit (Optional:CZ-P56SVK1U).

1 - 2

1. Line-up

Outdoor units

Type

Capacity: BTU/h (kW)

Cooling / Heating

U-72MF1U9 U-72MF1U9E

Outline of 3WAY VRF SYSTEM

72,000 (21.1)

/ 81,000 (23.7)

Air intake

Air

intake

37-1/2

Outdoor Unit

Type

Capacity: BTU/h (kW)

Cooling / Heating

U-96MF1U9 U-96MF1U9E

Air intake

(Ceiling panel dimensions)

Air discharge

(Maximum dimensions)

82-9/16

unit : in.

96,000 (28.1)

/ 108,000 (31.6)

Air intake

Air

intake

37-1/2

Air intake

Outdoor Unit

Outdoor unit model name ended with letters "U9E". Refer to the Section 1 "3. Salt-Air Damage Resistant Specifications".

1 - 3

(Ceiling panel dimensions)

82-9/16

Air discharge

(Maximum dimensions)

unit : in.

2. Features of 3WAY VRF SYSTEM

2-1. Outline of 3WAY VRF SYSTEM

System example

CONCENTRATION

Outline of 3WAY VRF SYSTEM

Since all pipings are concentrated into one pipe shaft, you can minimize piping space and construction labor

CONNECTION

System limitations

Maximum number of combined outdoor units Maximum tonnage of combined outdoor units Maximum number of connectable indoor units Indoor/outdoor unit capacity ratio Maximum actual piping length Maximum level difference (when outdoor unit is lower) Maximum total piping length

* Panasonic makes it possible to link outdoor

unit together for a large capacity (24-Ton).

If indoor/outdoor units need servicing, a ball valve (field supply) cuts off non-operational units to let other units stay running.

3 24-Ton 40 50~130% 492ft 164 (131) ft 984 ft

Solenoid valve kit

Indoor unit

ADDITION

If your indoor capacity load changes in the future, it’s easy to add on both indoor and outdoor units using the same pipings.

If the additional installment of outdoor and indoor units are

expected, the size of refrigerant piping should be decided according to the total capacity after the addition.

Combination of outdoor units

The DC inverter unit can be used independently or in combination.

CAUTION

Total tonnage

Type (ton)

R407C models and R22 models must not be used in combination with each other.

6 8 12 14 18 20 22 24

11 231

12231

1 - 4

2. Features of 3WAY VRF SYSTEM

Dimensions

Outline of 3WAY VRF SYSTEM

6, 8 Ton

Air intake

6-Ton 8-Ton

U-72MF1U9, U-72MF1U9E U-96MF1U9, U-96MF1U9E

Dimensions of unit combinations

* *

Air intake

74 (Ceiling panel dimensions)

(Ceiling panel dimensions)

Air intake

31-1/8

(Installation hole pitch)

(Ceiling panel dimensions)

Top view

12, 14 Ton

(Ceiling panel dimensions)

Air intake

37-1/2

36-1/4

(Installation hole pitch)

(Ceiling panel dimensions)

(Maximum dimensions)

Unit: in.

36-1/4

37-1/2

(Installation hole pitch)

(Ceiling panel dimensions)

(Installation hole pitch)

31-1/8

7-7/8

(Installation hole pitch)

70-1/8

(Installation hole pitch)

Top view

18, 20, 22, 24 Ton

113 (Ceiling panel dimensions)

(Ceiling panel dimensions)

(Installation hole pitch)

109-1/16 (Installation hole pitch)

31-1/8

Top view

31-1/8

(Ceiling panel dimensions)

8/7-78/7-731-1/8

(Installation hole pitch)

31-1/8

(Installation hole pitch)

(Ceiling panel dimensions)

(Maximum dimensions)

Unit: in.

36-1/4

37-1/2

(Installation hole pitch)

(Ceiling panel dimensions)

Unit: in.

(Maximum dimensions)

Outdoor unit model name ended with letters "U9E". Refer to the Section 1 "3. Salt-Air Damage Resistant Specifications".

1 - 5

Outline of 3WAY VRF SYSTEM

2. Features of 3WAY VRF SYSTEM

Capacity control

The compressor combination (DC inverter compressor + constant-speed compressor) allows smooth capacity control from

0.6-Ton to 24-Ton.

Realization of smooth capacity control from 0.6-Ton to 24-Ton

Capacity control is possible smoothly with a DC inverter compressor. The right graph shows the image of the operating combination of compressors in case of 24-Ton system. In actual operation, the combination will be changed by operating condition, operating time amount, priority of compressor and so on.

Comp. HP Unit1(main) Unit2(sub1) Unit3(sub2)

DC comp. 4.0 4.0 4.0

AC comp. 5.0 5.0 5.0

*24 Ton = U-96MF1U9 (U-96MF1U9E) Type x 3

Unit 1

DC1

AC1

Unit 2

DC2

AC2

Unit 3

DC3

AC3

Capacity

(Ton)

In case of 24-Ton system

DC1

DC1 DC2

DC1

DC2

DC3

Example of 3 unit connection

DC2

DC3

AC1

DC2

DC3

AC1

AC2

LOAD

DC2

DC3

AC1

AC2

AC3

---

1 - 6

3. Salt-Air Damage Resistant Speciﬁ cations

Specifications

Relevant Parts Material Standard Specifications

Outline of 3WAY VRF SYSTEM

Salt-Air Damage Resistant

Specifications

Outdoor unit model name ended

with letters "U9E".

Outer box/side plate/ drain pan between the stud

Base frame

Fan guard

Fin Aluminum

Tube Copper No treatment Zinc rich treatment (whole)

Tube plate

Exchanger

Heat

Propeller fan

Fan

Installation frame

Electrical component box

Tapping screws

Hot-dip zinc-coated steel sheet

Hot-dip aluminum-zinc coated steel sheet

Resin (Polypropylene) No treatment

Hot-dip zinc-coated steel sheet

Resin

Aluminum

Hot-dip zinc-coated steel sheet

SUS410

Polyester powder double coating (both sides)( m)40

No treatment

Motor maker's standard spec.Motor

Polyester powder double coating (both sides) m)120(

No treatment

Hexavalent chromium-free coating

Polyester powder double coating (both sides) ( m)120

No treatment

Zinc rich treatment

Zinc rich treatment (whole)

No treatment

Urethane coating

Motor maker's spec. for salt-air damage resistant (urethane coating)

Polyester powder double coating (both sides) 120 m)(

Polyester powder coating( 120 m)

Hexavalent chromium-free coating + urethane coating

(m)30

Stud supplementary bracket

Accumulator Receiver tank

Welded portion Copper tube No treatment Urethane coating

Outer surface Copper tube No treatment Urethane coating

Refrigeration

cycle tube

Fixing bracket

Notes:

1 Consult us before introducing a salt-air damage resistant model as it requires a special treatment. 2 The specifications are subject to change without notice for development. 3 Contact us for the delivery schedule.

Hot-dip zinc-coated steel sheet

Steel Epoxy coating + alkyd coating

Hot-dip zinc-coated steel sheet

No treatment

Polyester powder double coating ( 120 m)

Dessicant coating

Zinc rich double coating + urethane coating m)70(

Polyester powder double coating (both sides) m)80(

m) 30 (PC board --

1 - 7

– MEMO –

1 - 8

Design of 3WAY VRF SYSTEM

Contents

2. DESIGN OF 3WAY VRF SYSTEM

1. Model Selecting and Capacity Calculator ........................................................................2-2

2-21-1. Operating Range .............................................................................................................

2-31-2. Procedure for Selecting Models and Calculating Capacity ...........................................

2-41-3. Tubing Length .................................................................................................................

2-61-4. Tubing Size ......................................................................................................................

2-81-5. Installation Standards ......................................................................................................

2-91-6. Straight Equivalent Length of Joints ...............................................................................

2-101-7. Check of limit density ....................................................................................................

2-11................................................................8-1 Calculation of Actual Capacity of Indoor Unit

2-15................................9-1 Capacity Correction Graph According to Temperature Condition

2-161-10. ...Capacity Correction Graph According to Tubing Length and Elevation Difference

................................................................................................................. 2-182. System Design

2-182-1. System Example............................................................................................................

2-20.......2-2. Example of Tubing Size Selection for Extension and Additional Charge Amount

2-23............................................................................................2-3. Installing Distribution Joint

2-243. Electrical Wiring ..............................................................................................................

2-243-1. General Precautions on Wiring .....................................................................................

Recommended Wire Length and Wire Diameter for Power Supply System ..................

4-5. 2-33Precautions When Installing in Heavy Snow Areas ......................................................

4-6. Dimensions of Wind Ducting

4-7. Dimensions of Snow Ducting

Indoor Unit

Refer to the 2WAY VRF SYSTEM TECHNICAL DATA (TD831157)

Distribution Joint Kits

Solenoid Valve Kit for 3WAY VRF System ......................................................................

.....................................................................................................

2 - 1

2-243-2.

2-253-3. Wiring System Diagrams ...............................................................................................

2-283-4. Important Note When Wiring for Common Type ..........................................................

2-313-5. Important Note When Wiring for Y1 Type ....................................................................

2-324. Installation Instructions ..................................................................................................

2-32Outdoor Unit ..................................................................................................................

2-324-1. Selecting the Installation Site for Outdoor Unit ............................................................

2-33.....................................................................2-4 Removing Fin Guard for Heat Exchanger

2-33.......................................................................3-4 Shield for Horizontal Exhaust Discharge

2-33.........................................................4-4 Installing the Outdoor Unit in Heavy Snow Areas

2-34Reference diagram for air-discharge chamber (field supply).......................................

2-35Reference diagram for snow-proof ducting (field supply)............................................

2-364-8. Transporting the Outdoor Unit .....................................................................................

2-364-9. Installing the Outdoor Unit ............................................................................................

2-374-10. Remove the Brackets Used for Transport ..................................................................

2-374-11. Routing the Tubing ......................................................................................................

2-384-12. Prepare the Tubing......................................................................................................

2-384-13. Connect the Tubing.....................................................................................................

2-405. HOW TO PROCESS TUBING ..........................................................................................

2-405-1. Connecting the Refrigerant Tubing ..............................................................................

2-415-2. Connecting Tubing Between Indoor and Outdoor Units .............................................

2-425-3. Insulating the Refrigerant Tubing .................................................................................

2-435-4. Taping the Tubes ..........................................................................................................

2-435-5. Finishing the Installation ................................................................................................

2-446. AIR PURGING .................................................................................................................

2-44Air Purging with a Vacuum Pump (for Test Run) Preparation ..................................

2-477. Optional Parts ..................................................................................................................

2-477-1. 2-517-2.

1. Model Selecting and Capacity Calculator

1-1. Operating Range

Heating and Cooling

Design of 3WAY VRF SYSTEM

Outdoor air intake temp. F (WB)

-4 50 59

Operating range

68 77 86

Indoor air intake temp. F (DB)

Cooling

113

104

Heating

Operating range

68 77

Outdoor air intake temp. F (DB)

Indoor air intake temp. F (WB)

Outdoor air intake temp. F (WB)

-4 50

Operating range

68 77 86 95

Indoor air intake temp. F (DB)

2 - 2

Design of 3WAY VRF SYSTEM

1. Model Selecting and Capacity Calculator

1-2. Procedure for Selecting Models and Calculating Capacity

Model Selection Procedure

Select the model and calculate the capacity for each refrigerant system according to the procedure shown below.

Calculation of the indoor air-conditioning load

Calculate the maximum air-conditioning load for each room or zone.

Selection of an air conditioning system

Select the ideal air conditioning system for air conditioning of each room or zone.

Design of the control system

Design a suitable control system for the selected air conditioning system.

Preliminary selection of indoor and outdoor units

Make preliminary selections that are within the allowable range for the system

Check of the tubing length and elevation difference

Check that the length of refrigerant tubing and the elevation difference are within the allowable

ranges.........................................................................................................................................

Calculation of the corrected outdoor unit capacity

Capacity correction coefficient for model................................................................................

Capacity correction coefficient for outdoor temperature conditions...........................

Capacity correction coefficient for tubing length and elevation difference........................

Heating capacity correction coefficient for frosting/defrosting..........................................

Calculation of the corrected capacity for each indoor unit

Capacity correction coefficient for indoor temperature conditions....................................

Capacity distribution ratio based on the tubing length and elevation difference..............

Calculation of the actual capacity for each indoor unit

Calculate the corrected indoor/outdoor capacity ratio, based on the corrected outdoor unit capacity and the total corrected capacity of all indoor units in the same system. Use the result to

calculate the capacity correction coefficient for the indoor units.................................

Multiply the corrected capacity of each indoor unit by the capacity correction coefficient to calcu-

late the actual capacity for each indoor unit...........................................................................

Recheck of the actual capacity for each indoor unit

If the capacity is inadequate, reexamine the unit combinations.

Example 1: Increasing the outdoor unit capacity....................................................................

Example 2: Increasing the indoor unit capacity......................................................................

Increasing the tubing size........................................................................................................

Design of tubing

Create a tubing design which minimizes the amount of additional refrigerant charge as much as

possible...........................................................................................................................

If tubing extension for additional unit is expected in the future, create the tubing design with adequate consideration for this extension. Select the tubing size for the main tube (LA) up to the No. 1 distribution joint based on the rated cooling capacity of the outdoor unit. Select tubing sizes after the distribution point based on the total rated cooling capacity of the connected indoor units. Increasing the tubing size of the wide tubes can reduce the loss of capacity caused by longer tubing lengths. (Only the main wide tube with the largest tube diameter (main tube LA and main tubes after the distribution point that are the same size as LA) can be changed.) In this case, it is

necessary to recalculate the actual indoor unit capacities.....................................................

Calculation of additional refrigerant charge amount

Calculate the additional refrigerant charge from the diameters and lengths of the refrigerant tubing. Even if the wide tubing diameter was increased, determine the additional refrigerant charge

based only on the narrow tubing size.....................................................................................

Check the minimum indoor capacity (limit density) with respect to the amount of refrigerant. If the limit density is exceeded, be sure to install ventilation equipment or take other corrective steps.

Design of electrical wiring capacity

Select a wiring capacity according to the method of power supply.......................................

2 - 3

........

2-4 ~ 2-10

2-4

2-11

2-11, 13, 15

2-11, 14 2-11, 13

2-11, 14 2-11, 14

2-11 ~ 2-15

2-12

2-18 2-19 2-20

2-4 ~ 2-6

2-20

2-21

2-22

2-24

Design of 3WAY VRF SYSTEM

1. Model Selecting and Capacity Calculator

1-3. Tubing Length

Select the installation location so that the length and size of refrigerant tubing are within the allowable range shown in the figure below.

2. Main distribution tubes LC – LH are selected according to the capacity after the

The outdoor connection main tubing (LO portion) is determined by the total capacity of the

3. outdoor units that are connected to the tube ends.

Main tubing length LM = LA + LB … < 262 ft

distribution joint.

Sizes of indoor unit connection tubing 1 – 40 are determined by the connection tubing sizes on the indoor units.

Balance tubing (ø3/8")

Explanation of symbols

Distribution joint (purchased separately)

Ball valve (field supply)

T-joint (field supply)

Solidly welded shut (pinch weld)

Note: Do not use commercially available T-joints for the liquid tubing and parts.

Be sure to use special R410A distribution joints (CZ: purchased separately) for outdoor

unit connections and tubing branches.

LB LC

Max.1.3 ft

For extension

T-joint tubing (header joint system)

LE L3

Solenoid valve kit

R410A distribution joint CZ-P900PH1U CZ-P224BH1U (for indoor unit) CZ-P680BH1U (for indoor unit) CZ-P1350BH1U

(for outdoor unit)

(for indoor unit)

Table 2-1 Ranges that Apply to Refrigerant Tubing Lengths and to Differences in Installation Heights

Length (ft.)ContentsMarkItem

492

574

131

262ML

984

164

131

6.6

Allowable tubing length

Allowable elevation difference

Allowable length of joint tubing

L = Length, H = Height

L (L2 – L4)

,2...

L1+

A+B

...

+LF+LG+LH

H2 H3

Max. tubing length

Difference between max. length and min. length from the No. 1 distribution joint

Max. length of main tubing (at max. diameter)

Max. length of each distribution tube

Total max. tubing length including length of each distribution tube (only liquid tubing)

Distance between outdoor units

When outdoor unit is installed higher than indoor unit

When outdoor unit is installed lower than indoor unit Max. difference between indoor units Max. difference between outdoor units

T-joint tubing (field-supply); Max. tubing length between the first T-joint and solidly welded-shut end point

Actual length

Equivalent length

NOTE

The outdoor connection main tubing (LO portion) is determined by the total capacity of the outdoor units that are connected to the tube ends.

If the longest tubing length (L1) exceeds 295 ft. (equivalent length), increase the sizes of the main tubes (LM) by 1 rank for the discharge tubes, suction tubes, and narrow tubes. (field supplied)

If the longest main tube length (LM) exceeds 164 feet, increase the main tube size at the portion before 164 ft. by 1 rank for the suction tubes and discharge tubes. (field supplied)

(For the portion that exceeds 164 feet, set based on the main tube sizes (LA) listed in the table on the following page.)

4: If the tubing length (LA) is less than 16.4 feet, it is recommended that the suction tube be increased by 1 rank.

2 - 4

1. Model Selecting and Capacity Calculator

Refrigerant Charge Amount at Shipment (for outdoor unit)

(oz)

Additional Refrigerant Charge

Additional refrigerant charge amount is calculated from the liquid tubing total length as follows.

Amount of Refrigerant Charge Per ft., According to Liquid Tubing Size

(in. (mm))

ø1/4" (ø6.35)

ø3/8" (ø9.52)

ø1/2" (ø12.7)

ø5/8" (ø15.88)

ø3/4" (ø19.05)

ø7/8" (ø22.22)

U-72MF1U9

U-72MF1U9E

416

Liquid tubing size

Amount of refrigerant

charge (oz/ft.)

0.279

0.602

1.38

1.99

2.78

3.93

U-96MF1U9

U-96MF1U9E

416

Required amount of additional refrigerant charge = [(Amount of

additional refrigerant charge per ft. of each size of liquid tube ×

its tube length) + (...) + (...)] + [Necessary amount of additional

refrigerant charge per outdoor unit + (...) + (...)]

* Always charge accurately using a scale for weighing.

Design of 3WAY VRF SYSTEM

Table 2-1-1 Necessary Amount of Refrigerant Charge Per Outdoor Unit

Further charge a certain amount listed below in addition to the amount of refrigerant charge.

U-72MF1U9

U-72MF1U9E

42 oz/unit

NOTE

If the tubing length (LA) is less than 16.4 feet, it is necessary to add 71 oz/unit of refrigerant in addition to 42 oz.

System Limitations

Max. capacity allowable connected outdoor units 288,000 BTU/h (24-Ton, 84 kW)

*1: Up to 3 units can be connected if the system has been extended.

U-96MF1U9

U-96MF1U9E

42 oz/unit

3Max. No. allowable connected outdoor units

40Max. connectable indoor units

50 – 130 %Max. allowable indoor/outdoor capacity ratio

2 - 5

Design of 3WAY VRF SYSTEM

1. Model Selecting and Capacity Calculator

1-4. Tubing Size

Table 2-2 Main Tubing Size (LA)

BTU/h

(kW)

Total system tonnage

Combined outdoor models

Suction tubing

Discharge tubing

Liquid tubing

72,000

(21.1)

ø3/4"

(ø19.05)

ø5/8"

(ø15.88)

96,000

(28.1)

ø7/8"

(ø22.22)

ø3/4"

(ø19.05)

ø3/8"

(ø9.52)

139,000

(40.7)

U-72MF1U9(E)U-96MF1U9(E)U-72MF1U9(E) U-72MF1U9(E)

ø1/2"

(ø12.7) (ø15.88)

168,000

(49.2)

U-96MF1U9(E) U-72MF1U9(E)

ø1-1/8"

(ø28.58)

ø7/8"

(ø22.22)

203,000

(59.5)

186

U-72MF1U9(E) U-72MF1U9(E) U-72MF1U9(E)

ø5/8"

240,000

(70.3)

U-96MF1U9(E) U-72MF1U9(E) U-72MF1U9(E)

ø1-1/8"

(ø28.58)

264,000

U-96MF1U9(E) U-96MF1U9(E) U-72MF1U9(E)

ø1-3/8"

(ø34.92)

(ø19.05)

*1: If future extension is planned, select the tubing diameter based on the total tonnage after extension.

However extension is not possible if the resulting tubing size is two ranks higher. *2: The balance tube (outdoor unit tube) diameter is ø3/8" (ø9.52). *3: Type 1 tubing should be used for the refrigerant tubes. *4: If the length of the longest tube (L1) exceeds 295 ft. (equivalent length), increase the main tube (LM) size by 1 rank for the

suction, discharge, and liquid tubes. (Use field-supply reducers.) (Select from Table 2-2 and Table 2-7.) *5: If the longest main tube length (LM) exceeds 164 ft., increase the main tube size at the portion before 164 ft. by 1 rank for

the suction tubes and discharge tubes.

(For the portion that exceeds 164 ft., set based on the main tube sizes (LA) listed in the table above.)

(77.4)

ø3/4"

Unit: in. (mm)

288,000

(84.4)

U-96MF1U9(E) U-96MF1U9(E) U-96MF1U9(E)

Size of tubing (LO) between outdoor units

Select the size of tubing between outdoor units based on the main tubing size (LA) as given in the table above.

Table 2-3 Main Tubing Size After Distribution (LB, LC...)

Total capacity after distribution

Tubing size

Total capacity after distribution

Tubing size

Below BTU/h

Over BTU/h

Suction tubing

Discharge tubing

Liquid tubing

Below BTU/h

Over BTU/h

Suction tubing

Discharge tubing

Liquid tubing

24.200

(ø15.88) (ø19.05) (ø19.05) (ø22.22)

ø1/2" ø5/8" ø5/8" ø3/4"

ø3/8" ø3/8" ø3/8" ø3/8"

258.000

238.900 258.000

ø1-3/8" ø1-3/8" ø1-3/8"

ø1-1/8" ø1-1/8" ø1-1/8"

(ø19.05) (ø19.05) (ø19.05)

54.600

–

24.200

(ø15.88) (ø19.05) (ø22.22)(ø12.70)

334.400

85.300

54.600 ø3/4"ø3/4"ø5/8"

(ø15.88)

–

334.400

(ø34.92)(ø34.92)(ø34.92)

(ø28.58)(ø28.58)(ø28.58)

ø3/4"ø3/4"ø3/4"

102.400

Table 2-4 Outdoor Unit Tubing Connection Size ( A – D )

BTU/h

(kW)

Suction tubing

Discharge tubing

Liquid tubing

Balance tubing

72,000

(21.1)

ø3/4"

(ø19.05)

Brazing connection

ø5/8"

(ø15.88)

Brazing connection

ø3/8" (ø9.52)

Flare connection

ø3/8" (ø9.52)

Flare connection

96,000

(28.1)

ø7/8"

(ø22.22)

ø3/4"

(ø19.05)

ø3/8" (ø9.52)

Unit: in. (mm)

2 - 6

143.300

124.200

(ø28.58)

ø7/8"

ø1/2"

(ø12.70)

85.300

(ø9.52)(ø9.52)(ø9.52)(ø9.52)

124.200

102.400

(ø28.58)

ø3/4"

(ø19.05)

ø1/2"

(ø12.70)

The outdoor unit connection tubing (LO) is

*1:

determined by the total capacity of the outdoor units connected to the tube ends. The tubing size is selected based on the table of main tube sizes after the branch.

If the total capacity of the indoor units con-

*2:

nected to the tube ends is different from the total capacity of the outdoor units, then the main tube size is selected based on the total capacity of the outdoor units. (For LA, LB, and LF in particular)

If the size of tubing (LA) is less than 16.4 feet, it is recommended that the tubing diameter be larger than ø7/8" (ø22.22).

If the size of tubing (LA) is less than 16.4 feet, it is recommended that the tubing diameter be larger than ø1-1/8" (ø28.58).

162.400

143.300

(ø28.58)

ø7/8" ø7/8" ø1-1/8"

(ø22.22) (ø22.22)

ø1/2"

200.600

162.400 ø1-1/8"ø1-1/8"ø1-1/8"ø1-1/8"ø7/8"

(ø28.58)

(ø15.88)(ø12.70)

Unit: in. (mm)

238.900

200.600 ø1-1/8"

(ø28.58)

ø5/8"ø5/8"

(ø15.88)

1. Model Selecting and Capacity Calculator

Table 2-5 Amount of Refrigerant Charge

Liquid tubing size Amount of refrigerant

(in. (mm)) charge (oz/ft.)

ø1/4" (ø6.35) 0.279

ø3/8" (ø9.52) 0.602

ø1/2" (ø12.7) 1.38

ø5/8" (ø15.88) 1.99

ø3/4" (ø19.05) 2.78

ø7/8" (ø22.22) 3.93

Design of 3WAY VRF SYSTEM

Table 2-6 Indoor Unit Tubing Connection Size ( 1– 40 )

Indoor unit type

Distribution joint-solenoid valve kit tubing

Solenoid valv kit-Indoor unit tubing connection

*1: For the solenoid valve kits, use type 160 with parallel specifications. Branch the tubing before and after the solenoid valve kits.

Table 2-7 Refrigerant tubing (Existing tubing can be used.)

ø1/4" (ø6.35) t1/32 (t0.8)

ø3/8" (ø9.52) t1/32 (t0.8) ø1-1/8" (ø28.58) t5/128 (t1.0)

ø1/2" (ø12.7) t1/32 (t0.8)

ø5/8" (ø15.88) t5/128 (t1.0)

ø3/4" (ø19.05)

Suction tubing Discharge tubing Liquid tubing

Gas tubing

Liquid tubing

Material O Material 1/2H • H

over t5/128 (t1.0)

Tubing size (in. (mm))

ø7/8" (ø22.22) t5/128 (t1.0)

ø1-3/8" (ø34.92)

ø1-5/8" (ø41.28)

12 15 18 19 24 36 48 54

ø5/8" (ø15.88)

ø1/2" (ø12.7)

ø3/8" (ø9.52)

ø1/2" (ø12.7)

ø1/4" (ø6.35)

over t3/64 (t1.20)

t3/64 (t1.1)

When bending the tubes, use a bending radius that is at least 4 times the outer diameter of the tubes. In addition, take sufficient care to avoid crushing or damaging the tubes when bending them.

ø5/8" (ø15.88)

ø3/8" (ø9.52)

Unit: in. (mm)

2 - 7

1. Model Selecting and Capacity Calculator

1-5. Installation Standards

Relationship between A/C units and refrigerant tubing

Design of 3WAY VRF SYSTEM

Room

Indoor unit

Hallway

Solenoid

valve kit

Liquid

Room

Indoor unit

Gas tube

tube

Solenoid valve kit

Outdoor unit Outdoor unit Indoor unit

Install the solenoid valve kit 98 ft. or less from the indoor unit. In quiet locations such as hospitals, libraries, and hotel rooms, the refrigerant noise may be somewhat noticeable. It is recom-

mended that the solenoid valve kit be installed inside the corridor ceiling, at a location outside the room.

Hallway

Common solenoid valve kit

Multiple indoor units under group control can utilize a solenoid valve kit in common. Categories of connected indoor unit capacities are determined by the solenoid valve kit.

Type of solenoid valve kit Total capacity of indoor units (BTU/h)

160 19.000 < Total capacity

56 7.500

If the capacity range is exceeded, use 2 solenoid valves connected in parallel.

4-tube layout 3-tube layout 2-tube layout

Suction tube

Discharge tube

Liquid tube

Solenoid valve kit

54.600

Room

Indoor unit

Suction tube

Discharge tube

Liquid tube

Balance tube

Desirable Undesirable

Room

Indoor unit

Total capacity 19.000

(2) When adding ball valve for outdoor unit

1. Location: Install the ball valve at the main tube of the distribution joint.

Outdoor unit for extension

Ball valve (for extension)

(Planned expansion)

Main tube of distribution joint

Balance tube

Discharge tube

Less than 1.3 ft

Distribution joint

(Suction tube)

Main tube

Liquid tube

To indoor unit

2. Installation requirements

• Be sure to install the ball valve up-grade to prevent the inadvertent flow of oil.

• Install the ball valve at the shortest distance (within 1.3 ft.) from the main tube. If the diameter of the ball valve is smaller than that of the main tube, use a reducer or the like to reduce the size of the tubing at that location.

NOTE

• If the ball valve is installed at the outdoor unit (including extension for outdoor unit), face the service port of the valve toward the outdoor unit side (see above illustration; dotted line) and allow a distance of over 1.6 ft from the outdoor unit. If the ball valve is installed between the indoor unit (including extension for indoor unit) and the main tube, face the ball valve toward the indoor unit side (see above illustration; dotted line).

• Use a field supply ball valve.

2 - 8

Design of 3WAY VRF SYSTEM

1. Model Selecting and Capacity Calculator

1-6. Straight Equivalent Length of Joints

Design the tubing system by referring to the following table for the straight equivalent length of joints.

Table 2-8 Straight Equivalent Length of Joints

Gas tubing size (in.(mm))

90° elbow

45° elbow

U-shape tube bent (R2–23/64–3–15/16 in.)

T r ap bend

Y-branch distr ibution joint Equivalent length conversion not needed.

Ball v alve f or ser vice Equivalent length conversion not needed.

1/2"

(12.7)

0.8 0.9 1

7.5 9.2 10.5 15.4

5/8"

(15.88)

1 1.1 1.4 1.9 2.5 2.8

3 3.4 4.1 5.6 7.4 8.4

3/4"

(19.05)

1.6

1.2

4.7

1-1/8"

(28.58)

1.4

7/8"

(22.22)

12.5 19.2 22.3

1-3/8"

(34.92)

1.8 2.0

Unit: ft.

1-5/8"

(41.28)

2 - 9

1. Model Selecting and Capacity Calculator

Check of limit density

Design of 3WAY VRF SYSTEM

WARNING

1-7. Check of limit density

When installing an air conditioner in a room, it is necessary to ensure that if the refrigerant gas accidentally leaks out, its density does not exceed the limit level for that room.

CAUTION

Always check the gas density limit for the room in which the unit is installed.

Pay special attention to any location, such as a basement, etc., where leaking refrigerant can accumulate, since refrigerant gas is heavier than air.

2 - 10

Design of 3WAY VRF SYSTEM

1. Model Selecting and Capacity Calculator

1-8. Calculation of Actual Capacity of Indoor Unit

Calculating the actual capacity of each indoor unit

Because the capacity of a multi air-conditioner changes according to the temperature conditions, tubing length, elevation difference and other factors, select the correct model after taking into account the various correction values. When selecting The model, calculate the corrected capacities of the outdoor unit and each indoor unit. Use the corrected outdoor unit capacity and the total corrected capacity of all the indoor units to calculate the actual final capacity of each indoor unit.

1. Outdoor unit capacity correction coefficient

Find the outdoor unit capacity correction coefficient for the following items.

(1) Capacity correction for the outdoor unit model

The capacity correction coefficient is 1.00.

(2)

Capacity correction for the outdoor unit temperature conditions Cooling:

Heating:

(3) Capacity correction for the outdoor unit tubing length and elevation difference

From the graph of capacity change characteristics on page 2-14, use the tubing length and elevation difference to find the capacity correction coefficient. The outdoor unit correction coefficient is the value which corresponds to the most demanding indoor unit.

(4) Capacity correction for outdoor unit frosting/defrosting during heating

From the table on page 2-13, find the capacity correction coefficient.

From the graph of capacity characteristics on page 2-13 ( Graph of Outdoor Unit Capacity Characteristics), use the outdoor temperature to find the capacity correction coefficient. From the graph of capacity characteristics on page 2-15, use the outdoor temperature to find the capacity correction coefficient. * Indoor air intake temperature should be set to 68 °FDB.

2. Indoor unit capacity correction coefficients

Find the indoor unit capacity correction coefficient for the following items.

(2) Capacity correction for the indoor unit temperature conditions

From the graph of capacity characteristics on page 2-14 ( Graph of Indoor Unit Capacity Characteristics), use the indoor temperature to find the capacity correction coefficient.

(3) Capacity distribution ratio based on the indoor unit tubing length and elevation difference First, in the same way as for the outdoor unit, use the tubing length and elevation difference for each indoor unit to find the correction coefficient from the graph of capacity change characteristics on page 2-14. Then divide the result by the outdoor unit correction coefficient to find the capacity distribution ratio for each indoor unit.

Capacity distribution ratio for each indoor unit (3) = Correction coefficient for that indoor unit / Correction coefficient for the outdoor unit

3. Calculating the corrected capacities for the outdoor unit and each indoor unit

The corrected capacities for the outdoor unit and each indoor unit are calculated form the formula below.

Outdoor unit corrected cooling capacity (5) = Outdoor unit rated cooling capacity × Correction coefficient for model ((1)

Page 2-11) × Correction coefficient for outdoor temperature conditions ((2) Page 2-13) × Correction coefficient for tubing length and elevation difference ((3) Page 2-14)

* However, if the outdoor unit corrected cooling capacity [5] is greater than 100%, then the outdoor unit corrected cooling

capacity [5] is considered to be 100%.

Corrected cooling capacity of each indoor unit (5) = Rated cooling capacity for that indoor unit × Correction coefficient for indoor temperature conditions at that indoor unit ((2) Page 2-14) × Distribution ratio based on tubing length and elevation difference at that indoor unit ((3) Page 2-14)

However, the corrected cooling capacity of each indoor unit is found as shown below. If (2) < 100% and (2) × (3) > 100%: Corrected cooling capacity for that indoor unit [5] = Rated cooling capacity for that indoor unit If (2) >100%: Corrected cooling capacity for that indoor unit (5) = Rated cooling capacity for that indoor unit × (2)

2 - 11

Design of 3WAY VRF SYSTEM

1. Model Selecting and Capacity Calculator

Outdoor unit corrected heating capacity (5) = Outdoor unit rated heating capacity × Correction coefﬁ cient for model ((1)

Page 2-11) × Correction coefﬁ cient for outdoor temperature conditions ((2) Page 2-15) × Correction coefﬁ cient for tubing length and elevation difference ((3) Page 2-14) × Correction coefﬁ cient for frosting/defrosting ((4) Page

* However, if the outdoor unit corrected heating capacity [5] is greater than 100%, then the outdoor unit corrected heating

capacity is considered to be 100%.

Corrected heating capacity of each indoor unit (5) = Rated heating capacity for that indoor unit × Correction coefﬁ cient for

indoor temperature conditions at that indoor unit ((2) Page 2-14) × Distribution ratio based on tubing length and elevation difference at that indoor unit.

However, the corrected heating capacity of each indoor unit is found as shown below. If (2) < 100% and (2)

100%: Corrected heating capacity for that indoor unit (5) = Rated heating capacity for that indoor unit × (2)

If (2)

* Characteristic graphs are shown on the pages listed above next to each correction item. Find each correction coefﬁ cient

from the appropriate conditions.

× (3) > 100%: Corrected heating capacity for that indoor unit (5) = Rated heating capacity for that indoor unit

2-13)

4. Calculating the actual indoor unit capacity based on the indoor/outdoor corrected capacity ratio

Calculate the actual capacity of each indoor unit from the values (found in (3)) for the corrected outdoor unit capacity and the corrected capacity of each indoor unit.

Corrected indoor/outdoor capacity ratio during cooling (Ruc) = Total corrected cooling capacity of all indoor units in that system / Corrected outdoor unit cooling capacity

If the corrected outdoor unit cooling capacity is greater than or equal to the total corrected unit cooling capacity of all indoor units in that system (Ruc

Actual cooling capacity of each indoor unit (7) = Corrected cooling capacity of each indoor unit (5) (In other words, the correction coefﬁ cient (6), based on the corrected indoor/outdoor capacity ratios for each indoor unit, is 1.)

If the corrected outdoor unit cooling capacity is less than the total corrected unit cooling capacity of all indoor units in that system (Ruc > 1), then:

(Actual cooling capacity of each indoor unit (7)) = (Corrected cooling capacity of each indoor unit (5)) × (0.25 × Ruc + 0.75) / Ruc (In other words, the correction coefﬁ cient (6), based on the corrected indoor/outdoor capacity ratios for each indoor unit, is the underlined part in the formula above.)

Corrected indoor/outdoor capacity ratio during heating (Ruh) = Total corrected heating capacity of all indoor units in that system / Corrected outdoor unit heating capacity

If the corrected outdoor unit heating capacity is greater than or equal to the total corrected unit heating capacity of all indoor units in that system (Ruh

Actual heating capacity of each indoor unit (7) = Corrected heating capacity of each indoor unit (5)

(In other words, the correction coefﬁ cient (6), based on the corrected indoor/outdoor capacity ratios for each indoor unit, is 1.)

If the corrected outdoor unit heating capacity is less than the total corrected unit heating capacity of all indoor units in that system (Ruh > 1), then:

(Actual heating capacity of each indoor unit (7)) = (Corrected heating capacity of each indoor unit (5)) × (0.1 × Ruh + 0.9) / Ruh (In other words, the correction coefﬁ cient (6), based on the corrected indoor/outdoor capacity ratios for each indoor unit, is the underlined part in the formula above.)

1), then:

2 - 12

Design of 3WAY VRF SYSTEM

1. Model Selecting and Capacity Calculator

Refer to the graph below for the correction coefﬁ cients for Ruc and Ruh.

Indoor unit capacity correction coefficient for Ruc (cooling) Indoor unit capacity correction coefficient for Ruh (heating)

1.0

0.9

0.8

0.7

0.6

0.5

Indoor unit capacity correction coefficient

0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9

Corrected indoor/outdoor capacity ratio (Ruc or Ruh)

NOTE

When Ruc or Ruh is less than or equal to 1.0, the indoor unit capacity correction coefficient for both Ruc and Ruh is 1.0.

2.0

5. Graph of capacity correction coefficients

Graph of outdoor unit capacity characteristics (1 – (2))

Outdoor unit cooling capacity characteristics

120

110

100

Rate of cooling capacity change (%)

23 32 41 50 59 68 77 86 95 104 113

Outdoor air intake temp. (°F DB) Outdoor air intake temp. (°F WB)

Outdoor unit heating capacity correction coefﬁ cient during frosting/defrosting (1 – (4))

Outdoor intake air

(°FWB RH85%)

temp.

Correction coefficient 0.97 0.97 0.97 0.96 0.94 0.91 0.89 0.87 0.87 0.87 0.88 0.89 0.91 0.92 0.95 1.0

* To calculate the heating capacity with consideration for frosting/defrosting operation, multiply the heating capacity found

from the capacity graph by the correction coefﬁ cient from the table above.

–4 5 1417212324283032333537394142

Outdoor unit heating capacity characteristics

120

110

100

Rate of heating capacity change (%)

-4 5 142332415059

2 - 13

1. Model Selecting and Capacity Calculator

Graph of indoor unit capacity characteristics (2 – (2))

Indoor unit cooling capacity characteristics Indoor unit heating capacity characteristics

Design of 3WAY VRF SYSTEM

120

110

100

57 59 60 62 64 66 68 69 71 73 75 77 59 60 62 64 66 68 69 71 73 75 77 78

Indoor air intake temp. ( °F WB)

Rate of cooling capacity change (%)

indicates the rating point. indicates the rating point.

110

105

100

Indoor air intake temp. ( °F DB)

Rate of heating capacity change (%)

Graph of capacity change characteristics resulting from tubing length and elevation difference (1 / 2 – (3))

Base capacity change rate

164

131

100

-33

Elevation difference (ft)

-66

-98

-131 0 98 66 33 131 164 197 230 262 295 328 361 394 427 459 492

92 90 88 86 84 82 80 78 76

Equiv

alent length (ft)

The positive side for the elevation difference indicates that the outdoor unit is installed at a higher position than the indoor units. The negative side indicates the opposite.

Base capacity change rate

164

131

-33

Elevation difference (ft)

-66

-98

-131 0 98 66 33 131 164 197 230 262 295 328 361 394 427 459 492

Equivalent length (ft)

The capacity loss that is caused by the tubing length can be reduced by increasing the sizes of the discharge tubes and suc-

tion tubes. Refer to Table 2-9 and make the appropriate changes. However be sure that the total length does not exceed the maximum. * The only sizes which can be increased are the LM (main tube with the largest diameter) gas tubes, and the changes are

limited to those shown in Table 2-9. In addition, note that the additional refrigerant charge is determined only by the narrow-tube size.

Table 2-9 Equivalent Length Correction Coefﬁ cient when the Size of the Discharge Tubes and Suction Tubes (LM)

is Increased

Standard tubing diameter (gas tube, in.(mm))

Tubing diameter after change (gas tube,in.(mm))

Equivalent length correction coefficient

ø1/2"

(ø12.7)

ø5/8" ø3/4" ø7/8" ø1-1/8" ø1-3/8"

(ø15.88) (ø19.05) (ø22.22) (ø28.58) (ø34.92)

ø5/8"

(ø15.88) (ø19.05) (ø22.22) (ø28.58)

0.4 0.5 0.6

ø3/4" ø7/8" ø1-1/8"

* If the size of the discharge tubes and suction tubes (LM) have been increased, apply the correction coefﬁ cient from Table

2-9 and calculate the equivalent length of the LM section.

Equivalent length of tubing after size increase = Standard tubing equivalent length × Equivalent length correction coefﬁ cient

2 - 14

Design of 3WAY VRF SYSTEM

1. Model Selecting and Capacity Calculator

1-9. Capacity Correction Graph According to Temperature Condition

Capacity characteristics

(The corrected capacity for speciﬁ c temperature conditions can be found from the graphs below.)

< Cooling > < Heating >

6-Ton 8-Ton

130

Indoor air intake temp. (WB) = 71 FIndoor air intake temp. (WB) = 71 F

Indoor air intake temp. (WB) = 72°F

120

110

WB = 67°F

100

WB = 61°F

Capacity ratio (%)

120

110

100

Indoor air intake temp. (WB) = 72°F

WB = 67°F

WB = 61°F

Input ratio (%)

14 23 32 41 50 59 68 77 86 95

104 113

130

120

110 110

100

Capacity ratio (%)

130

120

100

Input ratio (%)

- 4

Indoor air intake temp. (°F DB)

5 142332415059

130

120

100

Capacity ratio (%)

130

120

110110

100

Input ratio (%)

- 4

5 142332415059

Indoor air intake temp. (°F DB)

Heating capacity correction coefﬁ cients for frost/defrost operation

Outdoor intake air temp.

–4 5 1417212324283032333537394142

(°F WB RH85%)

Correction coefficient 0.97 0.97 0.97 0.96 0.94 0.91 0.89 0.87 0.87 0.87 0.88 0.89 0.91 0.92 0.95 1.0

* The heating capacity when frost/defrost operation is considered is calculated by multiplying the heating capacity found

from the capacity graph by the correction coefﬁ cient from the table above.

2 - 15

Design of 3WAY VRF SYSTEM

1. Model Selecting and Capacity Calculator

Rated performance values

Item Cooling Heating

Cooling capacity

Type

72 72,000(21.1) 5.30 81,000(23.7) 5.79

96 96,000(28.1) 7.75 108,000(31.6) 8.6

BTU/h(kW)

1-10. Capacity Correction Graph According to Tubing Length and Elevation Difference

Capacity change characteristics

Base capacity change rate

164

131

100

–33

Elevation difference (ft)

–66

–98

–131

0 33 66 98 131 164 197 230 262 295 328 361 394 427 459 4920 33 66 98 131 164 197 230 262 295 328 361 394 427 459 492

92 90 88 86 84 82 80 78 76

Equivalent length (ft)

Power consumptionkWHeating capacity

BTU/h(kW)

Power consumption

Base capacity change rate

164

131

–33

–66

Elevation difference (ft)

–98

–131

0 33 66 98 131 164 197 230 262 295 328 361 394 427 459 492

Equivalent length (ft)

NOTE

The positive side for the elevation difference indicates that the outdoor unit is installed at a higher position than the indoor units. The negative side indicates the opposite.

*1 Sample calculations

(System: 8 Ton, 164ft equivalent length, 49ft elevation difference The cooling capacity and heating capacity for this system are found as shown below.)

●

Cooling operation

From the graph, the base capacity change rate is found to be

92.0%.

96,000 BTU/h

(28.1kW

●

Heating operation

From the graph, the base capacity change rate is found to be

97.2%. Because the calculation result exceeds 97.2%, the capacity change rate is 97.2%.

(31.6kW

92.0% = 88,320 BTU/h

92.0% = 25.8kW)

97.2% = 105,000 BTU/h108,000 BTU/h

97.2% = 30.7kW) Heating capacity is

Capacity change rate is 92.0%. Cooling capacity is 88,320 BTU/h (28.1 kW)

105,000 BTU/h (30.7 kW)

2 - 16

Design of 3WAY VRF SYSTEM

1. Model Selecting and Capacity Calculator

If the maximum tubing length (L1) exceeds 295 ft (equivalent length), increase the tubing size of the main liquid, gas tubes(LM) by one rank.

However, the upper limit for the gas tube size is Increasing the tubing size of the gas tubes can reduce the loss of capacity caused by longer tubing lengths. Refer to Table 2-11 to increase the tubing size. However, the maximum allowable tubing length must not be exceeded.

* The amount of additional refrigerant charge is determined from the liquid tube size only.

Table 2-10 Correction coefficient for equivalent length when the size of the gas tube (LM) is increased

Standard tube diameter (gas tube, in.(mm))

Tube diameter after change (gas tube, in.(mm))

Equivalent length correction coefficient

* When increasing the size of the suction and discharge tubing (LM), multiply by the

correction coefficient from Table 2-11 and calculate the equivalent length for section LM.

Tubing equivalent length after size increase = Standard tubing equivalent length × Equivalent length correction coefficient

ø1/2"

(ø12.7)

ø5/8"

(ø15.88)

ø5/8"

(ø15.88)

ø3/4"

(ø19.05)

0.4 0.5 0.6

1-3/8".

ø3/4"

(ø19.05)

ø7/8"

(ø22.22)

ø7/8"

(ø22.22)

ø1-1/8"

(ø28.58)

ø1-1/8"

(ø28.58)

ø1-3/8"

(ø34.92)

Table 2-11 Dimensions for connections of each part Unit: in.

Position A B C D E F G H I J Dimension ø1-1/2" ø1-1/4" ø1-1/8" ø1" ø7/8" ø3/4" ø5/8" ø1/2" ø3/8" −

2 - 17

Design of 3WAY VRF SYSTEM

2. System Design

2-1. System Example

(1) Below are the tables created using the “PAC System Diagram Software.” Details of the calculations are shown in (2).

As the maximum tubing length (equivalent length) is over 295ft. in the following selection sample, the item (3) is applied due to the main tube size up.

Outdoor

unit 1

Outdoor

unit 2

170 ft

Elevation difference: 33 ft

33 ft 33 ft 66 ft

33 ft 33 ft 33 ft

Indoor

unit 1

Indoor

unit 2

Selection conditions

Outdoor unit

Cooling

Heating

Actual tubing length

Equivalent length (with consideration for curves, etc.) [* Equivalent length after size-up correction]

* Equivalent length after size-up correction is used for the calculation of actual capacity.

Air condition (DB/WB)

Max. load (BTU/h)

Air condition (DB/WB)

Max. load (BTU/h)

91.0 / 72.0 78.0 / 64.0

37.0 / 35.0 69.0 / 55.0 69.0 / 55.0

367.2 ft

[285.6 ft]

Room 1 (indoor unit 1)

50,000

52,000

306 ft 205 ft

246 ft

[164.4 ft]

Preliminary selection

Outdoor unit

Selected model

Load (cooling/heating) (BTU/h)

Rated capacity (cooling/heating) (BTU/h)

(5) Corrected capacity (cooling/heating) (BTU/h)

(7) Actual capacity (cooling/heating) (BTU/h)

Total corrected capacity of indoor units (cooling/heating) = 126,915 / 143,254 Ruc = 126,915 / 125,752 = 1.009 > 1 Ruh = 143,254 / 120,304 = 1.191 > 1

Type

72 + 72

139,000 /

157,000

125,752 /

120,304

Room 1 (indoor unit 1)

Type 54

50,000 /

52,000

54,600 /

61,400

54,600 /

61,768

52,223 / 35,595 / 18,344 / 17,876 /

Indoor

unit 3

Room 2 (indoor unit 2)

78.0 / 64.0

32,000

33,000

238 ft

285.6 ft [204 ft]

Room 2 (indoor unit 2)

Type 36

32,000 /

33,000 19,000

36,000 /

39,000

35,842 /

39,234

Room 3 (indoor unit 3)

Solenoid valve kit

Indoor

unit 4

Room 4 (indoor unit 4)

78.0 / 64.0

18,000

69.0 / 55.0

19,000

271 ft

325.2 ft

[243.6 ft]

Type 18 Type 18

18,000 /

19,000 /

21,000

21,126

78.0 / 64.0

17,900

69.0 / 55.0

21,500

306 ft

367.2 ft

[285.6 ft]

Room 4 (indoor unit 4)

17,900 /

21,500

19,000 /

21,000

18,000 /18,472 /

21,126

18,07918,07933,57652,861

Outdoor unit changes

The corrected outdoor unit capacity is less than the total corrected capacity of all indoor units in the system. As a result, the actual capacity of each indoor unit is less than the maximum load. Therefore the outdoor unit is increased by one rank.

Outdoor unit

Selected model Type 54

Load (cooling/heating) (BTU/h)

Rated capacity (cooling/heating) (BTU/h)

(5) Corrected capacity (cooling/heating) (BTU/h)

(7) Actual capacity (cooling/heating) (BTU/h)

Total corrected capacity of indoor units (cooling/heating) = 126,915 / 143,254

Ruh = 143,254 / 146,242 = 0.980 < 1Ruc = 126,915 / 146,710 = 0.865 < 1

Type

96 + 72

168,000 / 54,600 / 36,000 / 19,000 / 19,000 /

189,000

146,710 / 54,600 / 35,842 / 18,472 / 18,000 /

146,242 61,768

Room 1 (indoor unit 1)

50,000 /

52,000 33,000 19,000 21,500

61,400 39,000 21,000 21,000

2 - 18

Room 2 (indoor unit 2)

Type 36 Type 18 Type 18

32,000 / 18,000 / 17,900 /

39,00061,400

Room 3 (indoor unit 3)

21,12639,234

Room 4 (indoor unit 4)

21,126

18,000 /18,472 /35,842 /54,600 /

21,00021,000

Design of 3WAY VRF SYSTEM

2. System Design

Indoor unit changes

The indoor unit in room 4, where the corrected indoor unit capacity is less than the maximum load, is increased by one rank.

Outdoor unit

Selected model

Load (cooling/heating) (BTU/h)

Rated capacity (cooling/heating) (BTU/h)

(5) Corrected capacity (cooling/heating) (BTU/h)

(7) Actual capacity (cooling/heating) (BTU/h)

Total corrected capacity of indoor units (cooling/heating) = 132,600 / 149,290

Ruh = 149,290 / 146,242 = 1.021 > 1Ruc = 132,600 / 146,710 = 0.904 < 1

For both cooling and heating in all rooms, actual capacity is now greater than or equal to the maximum load. Selection is completed.

Type

96 + 72

168,000 /

189,000

146,710 /

146,242

Room 1

(indoor unit 1)

Type 54 Type 36 Type 18 Type 24

50,000 /

52,000

54,600 /

61,400

54,600 /

61,768

54,600 /

60,631

(2) Calculate the final selection results according to the capacity calculation procedure.

Room 2

(indoor unit 2)

32,000 /

33,000

36,000 /

39,000

35,842 /

39,234

35,842 /

38,512

Room 3

(indoor unit 3)

18,000 /

19,000

19,000 /

21,000

18,472 /

21,126

18,472 /

20,737

Room 4

(indoor unit 4)

17,900 /

21,500

25,000 /

27,000

23,685 /

27,162

23,684 /

26,662

[From calculation of the correction coefficient to calculation of actual capacity]

Selected model

Load (cooling/heating) (BTU/h)

Rated capacity (cooling/heating) (BTU/h)

Model

(1)

(2) Temp. condition

(3) Tubing length, elevation difference

Distribution ratio

Correction coefficient

(4) Frosting/defrosting

Result of (2) × (3)

Correction coefficient applied to indoor unit *1

(5) Corrected capacity (BTU/h) *2

(6) Correction coefficient for corrected capacity ratio

(7) Actual capacity (BTU/h)

Outdoor unit

Type

96 + 72

168,000 /

189,000

1.0000 /

1.0000

1.0203 /

0.9688

0.8559 /

0.8974

0.8900

146,710 /

146,242

Room 1

(indoor unit 1)

Type 54 Type 36 Type 18 Type 24

50,000 /

52,000

54,600 /

61,400

0.9474 /

1.0060

0.9205 /

0.9436

1.0755 /

1.0515

1.0189 /

1.0578

1.0000 /

1.0000

54,600 /

61,768

1.0000 /

0.9816

54,600 /

60,631

Room 2

(indoor unit 2)

32,000 /

33,000

36,000 /

39,000

0.9474 /

1.0060

0.8995 /

0.9285

1.0509 /

1.0346

0.9956 /

1.0408

0.9956 /

1.0000

35,842 /

39,234

1.0000 /

0.9816

35,842 /

38,512

(Cooling/heating)

Room 3

(indoor unit 3)

18,000 /

19,000

19,000 /

21,000

0.9474 /

1.0060

0.8783 /

0.9134

1.0262 /

1.0178

0.9722 /

1.0239

0.9722 /

1.0000

18,472 /

21,126

1.0000 /

0.9816

18,472 /

20,737

Room 4

(indoor unit 4)

17,900 /

21,500

25,000 /

27,000

0.9474 /

1.0060

0.8559 /

0.8974

1.0000 /

1.0000

0.9474 /

1.0060

0.9474 /

1.0000

23,685 /

27,162

1.0000 /

0.9816

23,684 /

26,662

*1: This varies depending on the values of (2) and (2) × (Distribution ratio in (3)). *2: Corrected outdoor unit capacity = Rated outdoor unit capacity × (1) × (2) × (3) × (4)

The actual capacity is calculated as shown below.

Cooling: Ruc = (54,600 + 35,842 + 18,472 + 23,684) / 146,710 = 0.904 < 1 Therefore,

Actual cooling capacity of each indoor unit = Corrected cooling capacity of each indoor unit (In other words, the correction coefficient (6) for the corrected capacity ratio is 1.)

Heating: Ruh = (60,631 + 38,512 + 20,737 + 26,662) / 146,242 = 1.021 > 1

2 - 19

Design of 3WAY VRF SYSTEM

2. System Design

(3) Increasing the size of the refrigerant tubing

Increasing the tubing size of the gas tubes can reduce the loss of capacity caused by longer tubing lengths.

Refer to Table 2-11 to increase the tubing size. However, the maximum allowable tubing length must not be exceeded.

* The amount of additional refrigerant charge is determined from the liquid tube size only.

Table 2-10 Correction coefﬁ cient for equivalent length when the size of the gas tube (LM) is increased

Standard tube diameter (gas tube, in.(mm))

Tube diameter after change (gas tube, in.(mm))

Equivalent length correction coefficient

* When increasing the size of the suction and discharge tubing (LM), multiply by the correction coefﬁ cient from Table 2-11 and

calculate the equivalent length for section LM.

Tubing equivalent length after size increase = Standard tubing equivalent length × Equivalent length correction coefﬁ cient

ø1/2"

(ø12.7)

ø5/8"

(ø15.88)

ø5/8"

(ø15.88)

ø3/4"

(ø19.05)

0.4 0.5 0.6

ø3/4"

(ø19.05)

ø7/8"

(ø22.22)

ø7/8"

(ø22.22)

ø1-1/8"

(ø28.58)

ø1-1/8"

(ø28.58)

ø1-3/8"

(ø34.92)

2-2. Example of Tubing Size Selection for Extension and Additional Charge Amount

Sample calculation for the system below

Type 96

Type 72

Elevation difference

H=16.4 ft.

Elevation difference

H=16.4 ft.

LA LB LC

Type 36

L7 L8 L9

Type 09 Type 18 Type 18

1LD LE LE2

Extension indoor units

Solenoid Valve Kit

Type 18Type 18Type 36Type 09Type 18

2 - 20

2. System Design

Additional refrigerant charge before extension

La Lb LA LB LC LD

LE1

LH L1 L2 L3 L7 L8 L9

Liquid tube

diameter

ø3/8 ø3/8 ø3/4 ø1/2 ø1/2 ø1/2 ø3/8 ø3/8 ø3/8 ø3/8 ø1/4 ø1/4 ø1/4 ø1/4 ø1/4

Tubing length (ft)

(A)

6.6

65.6

26.2

19.7

16.4

26.2

13.1

9.8

13.1

Additional refrigerant charge

per 1 ft (oz/ft) (B)

0.602

2.78

1.38

0.602

0.279

(A) × (B) oz

3.973

39.491

72.836

27.186

9.873

15.772

7.886

5.900

2.734

3.655

251.881Total (oz)

Design of 3WAY VRF SYSTEM

252 oz

Additional refrigerant charge after extension

LE2

Liquid tube

diameter

ø3/8

ø1/4

Tubing length (ft)

(A)

13.1

16.4

13.1

19.7

23.0

Additional refrigerant charge

per 1 ft (oz/ft) (B)

0.602

0.279

0.279 6.417

(A) × (B) oz

7.886

9.873

7.886

5.496

37.559Total (oz)

38 oz

Calculation of additional refrigerant charge for the entire 3WAY VRF system

(Additional refrigerant charge for entire 3WAY VRF system)

[After extension] = (Refrigerant charge at outdoor unit) + (Additional refrigerant charge) = (416+416=832) + (252+38=290) + (42+42=84) = 1206

[Before extension] = 416+252+42 =710

Remark:

When planning an extension model, be sure to include the values of the Table 2-1-1 (Page 2-5) Necessary Amount of Refrigerant Charge per Outdoor Unit. If the tubing length (LA) is less than 16.4 feet, it is necessary to add 71 oz/unit of refrigerant in addition to 42 oz.

2 - 21

2. System Design

Always check the gas

WARNING

Checking of limit density

When installing an air conditioner in a room, it is necessary to ensure that even if the refrigerant gas accidentally leaks out, its density does not exceed the limit level for that room.

density limit for the room in which the unit is installed.

Design of 3WAY VRF SYSTEM

2 - 22

2. System Design

Design of 3WAY VRF SYSTEM

2-3. Installing Distribution Joint

Pay special attention to any

CAUTION

location, such as a basement, etc., where leaking refrigerant can accumulate, since refrigerant gas is heavier than air.

(1) Refer to “HOW TO ATTACH DISTRIBUTION JOINT”

enclosed with the optional distribution joint kit (CZP900PH1U, P224BH1U, P680BH1U, P1350BH1U).

(2) When creating a branch using a commercially available

T-joint (header joint system), orient the main tubing so that it is either horizontal (level) or vertical. In order to prevent accumulation of refrigerant oil in stopped units, if the main tubing is horizontal then each branch tubing length “B” should be at an angle that is greater than horizontal. If the main tubing is vertical, provide a raised starting portion for each branch. When only one indoor unit is connected to the side of “A” install part “A” at a positive angle (15-30°) for the ﬁ eld tubing as shown in the ﬁ gure.

[Header joint system]

Be sure to solidly weld shut the T-joint end (marked by “X”

in the ﬁ gure). In addition, pay attention to the insertion depth of each connected tube so that the ﬂ ow of refrigerant within the T-joint is not impeded.

When using the header joint system, do not make fur-

ther branches in the tubing.

Do not use the header joint system on the outdoor unit

side.

(3) If there are height differences between indoor units or if

branch tubing that follows a distribution joint is connected to only 1 unit, a trap or ball valve must be added to that distribution joint. (When adding the ball valve, locate it within 15 - 3/4" of the distribution joint.)

If a trap or ball valve is not added, do not operate the

system before repairs to a malfunctioning unit are completed. (The refrigerant oil sent through the tubing to the malfunctioning unit will accumulate and may damage the compressor.)

Tube branching methods (horizontal use)

Arrow view D

15 to 30°

view D

Arrow view C

view C

Header joint system (Indoor)

Install at a positive angle

Outdoor

Indoor

Horizontal line

L3 6.56 ft.

Types of vertical trap specifications

(When using ball valve)

Main tubing

Ball valve

(BV: purchased

separately)

Indoor unit (1)

(When not using ball valve)

Main tubing

Branch tubing is directed upward.

Indoor unit is directed downward

Indoor

Horizontal line

Indoor unit (more than 2 units)

(If only 1 unit is connected, a ball valve is also needed on this side.)

Horizontal

Indoor unit

More than 7–7/8"

Solidly welded shut (X)

(Each unit is connected to tubing that is either level or is directed downward.)

15 to 30

Horizontal line

View as seen from arrow

Install at a positive angle (15 – 30°)

2 - 23

3. Electrical Wiring

Design of 3WAY VRF SYSTEM

3-1. General Precautions on Wiring

(1) Before wiring, conﬁ rm the rated voltage of the unit

as shown on its nameplate, then carry out the wiring closely following the wiring diagram.

(2) Provide a power outlet to be used exclusively for each

unit, and a power supply disconnect, circuit breaker and earth leakage breaker for overcurrent protection should be provided in the exclusive line.

(3) To prevent possible hazards from insulation failure, the

unit must be grounded.

(4) Each wiring connection must be done in accordance

with the wiring system diagram. Wrong wiring may cause the unit to misoperate or become damaged.

(5) Do not allow wiring to touch the refrigerant tubing, com-

pressor, or any moving parts of the fan.

(6) Unauthorized changes in the internal wiring can be very

dangerous. The manufacturer will accept no responsi-

3-2. Recommended Wire Length and Wire Diameter for Power Supply System

Outdoor unit

Time delay fuse or

circuit capacity

bility for any damage or misoperation that occurs as a result of such unauthorized changes.

(7) Regulations on wire diameters differ from locality to lo-

cality. For ﬁ eld wiring rules, please refer to your LOCAL ELECTRICAL CODES before beginning.

You must ensure that installation complies with all rel-

evant rules and regulations.

(8) To prevent malfunction of the air conditioner caused by

electrical noise, care must be taken when wiring as follows:

The remote control wiring and the inter-unit control wiring

should be wired apart from the inter-unit power wiring.

Use shielded wires for inter-unit control wiring between

units and ground the shield on both sides.

(9) If the power supply cord of this appliance is damaged,

it must be replaced by a repair shop appointed by the manufacture, because special purpose tools are required.

U-72MF1U9

U-72MF1U9E

U-96MF1U9

U-96MF1U9E

Indoor unit

Typ e

D1, U1, Y1, F1, M1, T1, P1, R1

Control wiring

(A) Inter-unit (between outdoor and indoor units) control wiring*

AWG #18 (0.75 mm

Max. 3,280 ft.

NOTE

* With ring-type wire terminal.

Time delay fuse or

circuit capacity

10 – 16 A

) AWG #18 (0.75 mm2) AWG #18 (0.75 mm2)

40 A

45 A

(B) Remote control wiring (C) Control wiring for group control

Max. 1,640 ft.

(D) Inter-outdoor unit control wiring

Max. 650 ft. (Total)

AWG #18 (0.75 mm

Max. 980 ft.

)

2 - 24

3. Electrical Wiring

Design of 3WAY VRF SYSTEM

3-3. Wiring System Diagram

212

L1 L2

Ground

L1 L2

Ground

L1 L2

Ground

L1 L2

Ground

BLK WHT

Power supply 208 / 230V, 60Hz, 1-PH

K1 Type

Power supply 208 / 230V, 60Hz, 1-PH

Remote Controller

WHT BLK

Remote Controller

WHT BLK

BLK WHT

CONNECTOR 2P(WHT)

Group control:

Indoor

BLK WHT

unit (No. 1)

Indoor unit (No. 2)

Indoor unit (No. 3)

Indoor unit (No. n)

Outdoor unit

INV unit

Inter-outdoor unit control wiring

Outdoor unit INV unit

NOTE:

Power supply

208 / 230V, 60Hz, 3-PH

Ground

Power supply

208 / 230V, 60Hz, 3-PH

Ground

Disconnect switch

(Field Supply)

Disconnect Switch may be needed by the National/Local code.

ALWAYS COMPLY WITH NATIONAL AND LOCAL CODE REQUIREMENTS.

Outdoor Unit

4P terminal board

1234

(BLU)

L1 L2 L3

Inter-unit

control

wiring

Inter-outdoor unit control wiring

Indoor Unit

U1, E1 Types

7P terminal board

Y1, D1, T1, F1, M1, P1, R1 Types

6P terminal board

NOTE

(1)

Refer to Section 2 “3-2. Recommended Wire Length and Wire Diameter for Power Supply System” for the explanation of “A,” “B,” “C,” and “D,” in the above diagram.

(2)

The basic connection diagram of the indoor unit shows the 7P terminal board, so the terminal boards in your equipment may differ from the diagram.

(3)

Refrigerant Circuit (R.C.) address should be set before turning the power on.

(4)

Regarding the R.C. address setting, refer to Section 5 "TEST RUN." Address setting can be executed by remote controller automatically.

1(L1) 2(L2)

Power supply

K1 Type Model : S-07MK1U6

S-09MK1U6 S-12MK1U6

5P terminal board 5P terminal board

(L1)2(L2)

Power

supply

2 - 25

Unit

control

Line

Remote

control

Line

Unit

control

Line

L1 L2 U1 U2 R1 R2

Power supply

Unit

control

Line

Remote

control

Line

K1 Type Model : S-18MK1U6

S-19MS1U6 S-24MK1U6

2U1U2U1U

(L1)2(L2)

Power supply

Unit

control

Line

Design of 3WAY VRF SYSTEM

3. Electrical Wiring

CAUTION

(1)

When linking outdoor units in a network, disconnect the terminal extended from the short plug (CN003, 2P Black,

location: right bottom on the outdoor main control PCB) from all outdoor units except any one of the outdoor units.

(When shipping: In shorted condition.)

For a system without link (no connection wiring between outdoor units), do not remove the short plug.

(2)

Do not install the inter-unit control wiring in a way that forms a loop. (Fig. 2-1)

Outdoor unit

Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit

(3) Do not install inter-unit control wiring such as star branch wiring. Star branch wiring causes mis-address setting.

(Fig. 2-2)

Outdoor unit Indoor unit Indoor unit

(4) If branching the inter-unit control wiring, the number of branch points should be 16 or fewer.

(Branches less than 3.3 ft. are not included in the total branch number.) (Fig. 2-3)

Outdoor unit Outdoor unit Outdoor unit

Outdoor unit Outdoor unit

Prohibited

Fig. 2-1

Indoor unit Indoor unit

Branch point

Fig. 2-2

Branch point

16 or fewer

Indoor unit Indoor unit Indoor unit Indoor unit

more than 3.3 ft.

Indoor unit

more than 3.3 ft.

Indoor unit

less than 3.3 ft.

Indoor unit

Indoor unit Indoor unit Indoor unit

Fig. 2-3

2 - 26

3. Electrical Wiring

Loose wiring may cause the

WARNING

When connecting each power wire to the terminal, follow the instructions on “How to connect wiring to the terminal” and fasten the wire securely with the fixing screw of the terminal plate.

How to connect wiring to the terminal

terminal to overheat or result

in unit malfunction. A fire

hazard may also exist.

Therefore, ensure that all

wiring is tightly connected.

Design of 3WAY VRF SYSTEM

For stranded wiring

(1)

Cut the wire end with cutting pliers, then strip the insulation to expose the stranded wiring approx. 3/8" and tightly twist the wire ends. (Fig. 2-4)

(2)

Using a Phillips head screwdriver, remove the terminal screw(s) on the terminal plate.

(3)

Using a ring connector fastener or pliers, securely clamp each stripped wire end with a ring pressure terminal.

(4)

Place the ring pressure terminal, and replace and tighten the removed terminal screw using a screwdriver. (Fig. 2-5)

Special washer

Wire

Stranded wire

Strip 3/8"

Fig. 2-4

Screw

Ring pressure terminal

Terminal plate

Wire

Fig. 2-5

Ring pressure terminal

Screw and Special washer

Ring pressure

terminal

2 - 27

3. Electrical Wiring

Design of 3WAY VRF SYSTEM

3-4. Important Note When Wiring for Common Type

Connect the wires referring to the diagram. Note that the control wirings (Low voltages) shall be segregated from the power supply wires (High voltage) as follows:

Connect the Inter-unit control wiring to U1/U2 terminals and the remote control wire to R1/R2. (excepting K1 type).

Connect the power supply wires to “L1, L2” of the terminal block. Be sure to connect the grounding conductor of the incoming power supply to the earth (ground) screw.

Securely affix the power supply wires and remote control wires by the clamping strap or clamping clip not to cross each other and not to leave the wirings loose. When loosening the clamping clip, twist the strap and it will come undone.

Clamping clip

Twist

NOTE

Securely affix the 3-way wiring harness with the remote control wiring (U1 type).

U1 Type

Earth screw

Power wiring (field supplied)

Clamping clip

Conduit

Connection for Solenoid Valve Kit (for 3WAY)

Remote control wiring and Inter-unit control wiring (field supplied)

Clamping clip

Remote control wiring and Inter-unit control wiring (field supplied)

Earth screw

Conduit (field supplied)

Power wiring (field supplied)

F1 TypeD1 Type

Earth screw

Power wiring (field supplied)

Conduit (field supplied)

Clamping clip

Remote control wiring and Inter-unit control wiring (field supplied)

Connection for Solenoid Valve Kit (for 3WAY)

2 - 28

3. Electrical Wiring

Important Note When Wiring for Common Type (Continued)

Design of 3WAY VRF SYSTEM

E1 Type

Remote control wiring and Inter-unit control wiring (field supplied)

Earth screw

Power wiring (field supplied)

Clamping clip

Conduit (field supplied)

T1 Type

Clamping clip

Earth screw

Remote control wiring (field supplied)

Power wiring (field supplied)

Conduit (field supplied)

M1 Type

Earth screw

Power wiring (field supplied)

Clamping clip

Conduit (field supplied)

Remote control wiring and Inter-unit control wiring (field supplied)

P1, R1 Type

Clamping clip

Power wiring (field supplied)

Earth screw

Conduit

Optional remote control wiring (field supplied)

Connection for Solenoid Valve Kit (for 3WAY)

3-way connection wiring with harness(supplied)

2 - 29

3. Electrical Wiring

Important Note When Wiring for Common Type (Continued)

K1 Type

Design of 3WAY VRF SYSTEM

Model : S-07MK1U6

S-09MK1U6 S-12MK1U6

Power wiring (field supplied)

Conduit (field supplied)

Clamping strap

Connection for Solenoid Valve Kit (for 3WAY)

Remote control wiring and Inter-unit control wiring (field supplied)

K1 Type

Model : S-18MK1U6

S-19MS1U6* S-24MK1U6

Power wiring (field supplied)

Earth screw

Clamping strap

Conduit (field supplied)

Connection for Solenoid Valve Kit (for 3WAY)

Remote control wiring and Inter-unit control wiring (field supplied)

* Necessary to install the External Electronic Expansion Valve Kit (Optional : CZ-P56SVK1U)

2 - 30

3. Electrical Wiring

3-5. Important Note When Wiring for Y1 Type

Connect the wires referring to the diagram. Note that the control wirings (Low Voltages) shall be segregated from the power supply wires (High Voltage) as follows:

Connect the Inter-unit control wiring to U1/U2 terminals and the remote control wire to R1/R2. Then place and fix the two clasps so that the clasps shall cover both the remote control wires, the Interunit control wiring and the 3-way wiring harness as shown in the magnified drawing.

Connect the grounding conductor of the incoming power supply to the earth (ground) screw before connecting the power supply conductors to “L1, L2” of the terminal block.

Securely affix the two power supply conductors (L1, L2) in the wiring channel by the clamping strap as shown.

Design of 3WAY VRF SYSTEM

Y1 Type

Connection for Solenoid

Valve Kit (for 3WAY) Remote control wiring (field supplied)

Clasp

Power wiring (field supplied)

NOTE

Take care not to damage the control wirings by the clasp. Do not leave the control wirings loose.

Entirely cover the control wirings (Remote / Inter-unit 3WAY connection)

Remote control wiring and Inter-unit control wiring (field supplied)

Conduit (field supplied)

Earth screw

Clamping clip

2 - 31

4. Installation Instructions

Design of 3WAY VRF SYSTEM

4-1. Selecting the Installation Site for Outdoor Unit

AVOID:

heat sources, exhaust fans, etc.

damp, humid or uneven locations

indoors (no-ventilation location)

DO:

choose a place as cool as possible.

choose a place that is well ventilated.

allow enough room around the unit for air intake/ exhaust and possible maintenance.

use lug bolts or equal to bolt down unit, reducing vibration and noise.

Installation Space

Install the outdoor unit where there is enough space for ventilation. Otherwise the unit may not operate properly. Fig. 2-7 shows the minimum space requirement around the outdoor units when 3 sides are open and only 1 side is shuttered, with open space above the unit. The mounting base should be concrete or a similar material that allows for adequate drainage. Make provisions for anchor bolts, platform height, and other site-specific installation requirements.

Leave space open above the

CAUTION

unit.

Construct louvers or other openings in the wall, if necessary, to ensure adequate ventilation.

NOTE

More than 2 in.

* More than 4 in.

* However, be sure to ensure a space of 1 ft. or more at

either the right side or the rear of the unit.

(Ceiling panel dimensions)

Exhaust fan

Hot air

Heat

Outdoor unit

Fig. 2-6

Example of installation of 2 units

(When wall height is below 6 ft.)

* More than 4 in.

Fig. 2-7

113 (Ceiling panel dimensions)

(Ceiling panel dimensions)

4435

source

* More than 4 in.

(Ceiling panel dimensions)

More than

1.7 ft.

Do not do any wiring or tubing within 1 ft. of the front panel, because this space is needed as a servicing space for the compressor.

Ensure a base height of 4 in. or more to ensure that drainage water does not accumulate and freeze around the bottom of the unit.

If installing a drain pan, install the drain pan prior to installing the outdoor unit.

* Make sure there is at least 6 in. between the outdoor

unit and the ground. Also, the direction of the tubing and electrical wiring should be from the front of the outdoor unit.

2 - 32

31-1/8

(Installation hole pitch)

7-7/8

109-1/16 (Installation hole pitch)

31-1/8

(Installation hole pitch)

Fig. 2-8

7-7/8

(Installation hole pitch)

31-1/8

35(Ceiling panel dimensions)

36-1/4 (Installation hole pitch)

37-1/2 (Maximum dimensions)

Unit: in.Top v ie w

4. Installation Instructions

4-2. Removing Fin Guard for Heat Exchanger

After installation of the outdoor unit, detach the fin guard for heat exchangers as following steps.

Cut out the fin guard entirely attached to the panel and remove it from the outdoor unit. Pay careful attention not to damage the fin when cutting out the fin guard.

If there is a case where easy to touch the sharp aluminum fin of the outdoor unit, be sure to attach a snow-proof ducting to the unit. It is recommended that the outdoor unit be located away from the touched with hands.

4-3. Shield for Horizontal Exhaust Discharge

It is necessary to install an air-discharge chamber (field supply) to direct exhaust from the fan horizontally if it is difficult to provide a minimum space of 7 ft. between the air-discharge outlet and a nearby obstacle. (Fig. 2-9)

In regions with heavy snowfall,

CAUTION

the outdoor unit should be provided with a solid, raised platform and snow-proof ducting (field supply). (Fig. 2-10)

Design of 3WAY VRF SYSTEM

Fig. 2-9

4-4. Installing the Outdoor Unit in Heavy Snow

Areas

In locations where wind-blown snow can be a problem, snowproof ducting (field supply) should be fitted to the unit and direct exposure to the wind should be avoided as much as possible. (Fig. 2-11) The following problems may occur if proper countermeasures are not taken:

The fan in the outdoor unit may stop running, causing the unit to be damaged.

There may be no air flow.

The tubing may freeze and burst.

The condenser pressure may drop because of strong wind, and the indoor unit may freeze.

4-5. Precautions When Installing in Heavy Snow

Areas

The platform should be higher than the maximum snow depth. (Fig. 2-10)

The 2 anchoring feet of the outdoor unit should be used for the platform, and the platform should be installed beneath the air-intake side of the outdoor unit.

The platform foundation must be solid and the unit must be secured with anchor bolts.

When installing on a roof subject to strong wind, countermeasures must be taken to prevent the unit from being overturned.

2 - 33

AVOID

Without snowproof ducting (Without platform)

Fig. 2-10

Fig. 2-11

Fallen snow

With snowproof ducting (High platform)

4. Installation Instructions

4-6. Dimensions of Wind Ducting

Reference diagram for air-discharge chamber (field supply)

Design of 3WAY VRF SYSTEM

unit: in.

33-3/16

(Ceiling panel dimensions)

35-1/4

(Maximum bracket dimensions)

Front view Right side view Front view Right side view

3-unit installation

(Installation hole pitch)

Ceiling panel Ceiling panel

Air direction: Front direction Air direction: Right direction

(Ceiling panel dimensions)

(32-1/8)

106-1/8

74-1/16

Note:

Can be installed so that the air direction is to the front, right, left or rear direction.

(3-unit installation: maximum dimensions)

113

(2-unit installation: maximum dimensions)

33-3/16 33-3/16 33-3/16

31-1/8

74-1/4

5-3/4

31-1/8

(Installation hole pitch)

5-3/4

31-1/8

(Installation hole pitch)

(Ceiling panel dimensions)

Top view

33-1/4

35-1/4

(Ceiling panel dimensions)

(Maximum bracket dimensions)

(32-1/8)

106-1/8

74-1/16

unit: in.

36-1/4

7-7/8 7-7/8

(Installation hole pitch)

(32-1/8)

106-1/8

74-1/16

Front view Right side view

(Ceiling panel dimensions)

2 - 34

4. Installation Instructions

4-7. Dimensions of Snow Ducting

Reference diagram for snow-proof ducting (field supply)

Air direction: Front direction

31-1/2

Design of 3WAY VRF SYSTEM

Air direction: Right direction

31-1/2

(Air intake duct)

33-3/16

9-1/2 9-1/2

53-5/8

Note:

(Air outlet duct)

(Ceiling panel dimensions)

(54)

1 pc.

44-3/8

Front view

Can be installed so that the air direction is to the front, right, left or rear direction.

3-unit installation

Ceiling panel Ceiling panel

31-1/2

9-1/2

106-1/8

4 pc.

35 35 35

(Ceiling panel dimensions)

(32-1/8)

74-1/16

Right side view

113

32-7/8

31-1/2

33-3/16

(Air intake duct)

31-1/2

9-1/2 9-1/2 9-1/2

(Ceiling panel dimensions)

32-7/8

(54)

(Air outlet duct)

(Ceiling panel dimensions)

9-1/2 9-1/2

unit: in.

53-5/8

44-3/8

Right side viewFront view

Snowfall protection duct (Field supply)

31-1/2

Air-discharge chamber (Field supply)

Snowfall protection duct (Field supply)

53-5/8

44-3/8

31-1/8

7-7/8 7-7/8

Board (Field supply)

31-1/8 31-1/8

Board (Field supply)

Air-discharge chamber (Field supply)

131-3/4

Front view

37-3/8

36-1/4

Top view (Before installation of snowfall protection duct)

Snowfall protection duct (Field supply)

31-1/2

35 (Ceiling panel dimensions)

7/82-1/8

Air-discharge chamber (Field supply)

Snowfall protection duct (Field supply)

44-3/8

Right side view

Ceiling panel

Snowfall protection duct (Field supply)

53-5/8

44-3/8

9-1/2 9-1/2

106-1/8

unit: in.

53-5/8

2 - 35

4. Installation Instructions

4-8. Transporting the Outdoor Unit

When transporting the unit, have it delivered as close to the installation site as possible without unpacking. Use a hook for suspending the unit. (Fig. 2-12)

CAUTION

When hoisting the outdoor unit, pass ropes or straps under the bottom plate as shown in the figure at right. When hoisting, the angle between the rope and top panel must be 70° or greater so that the rope does not come into contact with the fan guard. (Use 2 lengths of rope 25 ft. long or longer.)

When passing the ropes through the square holes of the bottom plate: Place the rope in the outer edge of the square holes.

Use protective panels or padding at all locations where the rope contacts the outer casing or other parts to prevent scratching. In particular, use protective material (such as cloth or cardboard) to prevent the edges of the top panel from being scratched.

Be careful of the fan. There is danger of injury if the fan starts to turn during inspection. Be sure to turn OFF the remote power switch before beginning inspection.

4-9. Installing the Outdoor Unit

(1)

Use anchor bolts (M12 or 15/32") or similar to securely anchor the unit in place. (Fig. 2-13)

(2)

Be sure the rubber vibration insulator and platform extend to the inside of the legs. In addition, the washers used to anchor the unit from the top must be larger than the installation anchor holes. (Figs. 2-13 and 2-14)

(Positions where anchor bolts are fastened)

Installation anchor hole (4-19/32 25/32 oval holes)

unit: in.

Design of 3WAY VRF SYSTEM

Fig. 2-12

Plate leg

Anchor bolts

Washer

25/32

3-15/32

(3-15/16)

The vibration insulator, base, or platform must be large enough to bear the full surface of the base plate legs.

Vibration insulator

1-31/32

Base

Unit: in.

31-1/8

(Installation hole pitch)

(Ceiling panel dimensions)

31-1/8

(Installation hole pitch)

113 (Ceiling panel dimensions)

(Ceiling panel dimensions)

109 (Installation hole pitch)

37-1/2

36-1/4

(Installation hole pitch)

(Ceiling panel dimensions)

(Installation hole pitch)

Fig. 2-15

(Maximum dimensions)

31-1/8

Top v i ew

(Ceiling panel dimensions)

31-1/8

(Installation hole pitch)

4 – 19/32 25/32 hole

37-1/2

36-1/4

(Installation hole pitch)

(Ceiling panel dimensions)

(Maximum dimensions)

Surface where

installation anchor

brackets are

installed

1-31/32

Fig. 2-13

(Detailed view of legs)

19/32

Unit: in.

1-33/64

Fig. 2-14

2 - 36

Design of 3WAY VRF SYSTEM

4. Installation Instructions

4-10. Remove the Brackets Used for Transport

After installing the unit, remove the 2 transport brackets from the front

and rear (4 brackets total).

4-11. Routing the Tubing

The tubing can be routed out either from the front or from the bottom. (Fig. 2-17)

The connecting valve is contained inside the unit. Therefore, remove the front panel. (Fig. 2-17)

(1) If the tubing is routed out from the front, use cutting pliers or a similar tool to cut out the tubing outlet slit (part

indicated by ) from the tubing cover. (Figs. 2-17 and 2-18)

(Fig. 2-16)

Remove the 2 screws (8 screws total)

Remove the 2 transport brackets from the front and rear (4 brackets total)

Fig. 2-16

Front

Bottom

Tubing cover

Remove 2 screws

(2) If the tubing is routed out from the bottom, remove

the slit part (

Use a drill bit approximately 13/64" dia. to create holes at the 4 slit hole indentations (openings).

Punch out the slit part ( ).

Be careful not to damage the base plate.

Use cutting pliers or similar tool to cut cover out

Remove 11 panel screws from front panel

Fig. 2-17

Indentation (4 locations)

Slit hole

2 - 37

Fig. 2-18

Design of 3WAY VRF SYSTEM

4. Installation Instructions

4-12. Prepare the Tubing

Material: Use C1220 phosphorous deoxidized copper as described in JIS H3300, “Copper and Copper Alloy Seamless Pipes and Tubes.” (For tubes that are ø7/8" (ø22.22 mm) or larger, use 1/2H material or H material. For all others use O material.) Tubing size Use the tubing size indicated in the table below. When cutting the tubing, use a tube cutter, and be sure to remove any burrs. (The same applies to distribution tubing (optional).) When bending the tubes, bend each tube using a radius that is at least 4 times the outer diameter of the tube. When bending, use sufficient care to avoid crushing or damaging the tube. For flaring, use a flare tool, and be sure that flaring is performed correctly.

Use sufficient caution during preparation of the tubing. Seal the tube ends by

CAUTION

Refrigerant tubing (Existing tubing can be used.)

Outer dia. Thickness Outer dia. Thickness

ø1/4" (ø6.35) t1/32" (t0.8) ø3/4" (ø19.05) over t5/128" (t1.0) ø3/8" (ø9.52) t1/32" (t0.8) ø7/8" (ø22.22) t5/128" (t1.0) ø1/2" (ø12.7) t1/32" (t0.8) ø1-1/8" (ø28.58) t5/128" (t1.0)

ø5/8" (ø15.88) t5/128" (t1.0) ø1-3/8" (ø34.92) t3/64" (t1.1)

4-13. Connect the Tubing

means of caps or taping to prevent dust, moisture, or other foreign substances from entering the tubes.

Tubing size (mm)

Use the supplied connector tubing. (See figure below.)

72 type (6-Ton)

96 type (8-Ton)

Refrigerant tubing

Suction tube Brazed connection

Discharge tube Brazed connection

Liquid tube Brazed connection No

Balance tube Flared connection No

Refrigerant tubing

Suction tube Brazed connection

Discharge tube Brazed connection

Liquid tube Brazed connection No

Balance tube Flared connection No

Connection method

Refrigerant tube port

Use caulking, putty, or a similar material to fill any gaps at the refrigerant tube port ( ) in order to prevent rainwater, dust or foreign substances from entering the unit. * Perform this work even if the tubing is routed out

in a downward direction.

Use supplied connector tube?

No No

Use supplied

connector tube? Yes (ø3/4" → ø7/8") Yes (ø5/8" → ø3/4")

Tubing routed out forward

2 - 38

Tubing cover

Tubing routed out downward

Base plate

4. Installation Instructions

Design of 3WAY VRF SYSTEM

Tighten each cap as specified below.

Tightening torque for each cap

Service port cap

(width 19/32")

Valve cap

(width 55/64")

Flare nut

(valve dia. ø3/8")

Do not apply an adjustable wrench to the hexagonal part.

Do not use two adjustable wrenches when removing or installing the balance tube flare nut. In particular, do not apply an adjustable wrench to the hexagonal part at the top of the valve. (If force is applied to this part, gas leakage will occur.)

60 – 100 lbs · in (70 – 120 kgf · cm)

170 – 220 lbs · in (200 – 250 kgf · cm)

300 – 360 lbs · in (340 – 420 kgf · cm)

Valve cap

Flare nut

Service port cap

Use two adjustable wrenches, as shown in the figure, when removing the liquid tube valve flare nut.

1. Do not apply a wrench to the valve cap when removing or installing the flare nuts. Doing so may damage the valve.

2. If the valve cap is left off for a long period of time, refrigerant leakage will occur. Therefore, do not leave the valve cap off.

3. Applying refrigerant oil to the flare surface can be effective in preventing gas leakage, however be sure to use a refrigerant oil which is suitable for the refrigerant that is used in the system. (This unit utilizes R410A refrigerant, and the refrigerant oil is ether oil (synthetic oil). However, hub oil (synthetic oil) can also be used.)

Precautions for brazing Be sure to replace the air inside the tube with nitrogen to prevent oxide film from forming during the brazing process. Be sure to use a damp cloth or other means to cool the valve unit during brazing.

Work method

CAUTION

Field-supply tube

Brazing locations

Be sure to use nitrogen. (Oxygen, CO

1. 2

Use a pressure-reducing valve on the nitrogen tank.

Do not use agents intended to prevent the formation of oxide film. They will adversely affect the refrigeration oil, and may cause equipment failure.

The balance tube is not used if only 1 outdoor unit is installed. Use the unit in the same conditions as when it was shipped from the factory.

Taping

Remote valve

Pressure-reducing valve (regulator)

Nitrogen

, and CFC must not be used.)

2 - 39

5. HOW TO PROCESS TUBING

Design of 3WAY VRF SYSTEM

5. HOW TO PROCESS TUBING

The liquid tubing side is connected by a flare nut, and the gas tubing side is connected by brazing.

5-1. Connecting the Refrigerant Tubing

Use of the Flaring Method

Many of conventional split system air conditioners employ the flaring method to connect refrigerant tubes which run between indoor and outdoor units. In this method, the copper tubes are flared at each end and connected with flare nuts.

Flaring Procedure with a Flare Tool

(1)

Cut the copper tube to the required length with a tube cutter. It is recommended to cut approx. 1 – 2 ft. longer than the tubing length you estimate.

(2)

Remove burrs at the end of the copper tube with a tube reamer or file. This process is important and should be done carefully to make a good flare. (Fig. 2-19)

NOTE

When reaming, hold the tube end downward and be sure that no copper scraps fall into the tube. (Fig. 2-20)

Deburring

AfterBefore

Fig. 2-19

Copper tubing

Reamer

Fig. 2-20

(3)

Remove the flare nut from the unit and be sure to mount it on the copper tube.

(4)

Make a flare at the end of copper tube with a flare tool. (Fig. 2-21)

NOTE

A good flare should have the following characteristics:

inside surface is glossy and smooth edge is smooth tapered sides are of uniform length

Flare nut

Copper tubing

Flare tool

Fig. 2-21

2 - 40

5. HOW TO PROCESS TUBING

Caution Before Connecting Tubes Tightly

(1)

Apply a sealing cap or water-proof tape to prevent dust or water from entering the tubes before they are used.

(2)

Be sure to apply refrigerant lubricant to the matching surfaces of the flare and union before connecting them together. This is effective for reducing gas leaks. (Fig. 2-22)

(3)

For proper connection, align the union tube and flare tube straight with each other, then screw in the flare nut lightly at first to obtain a smooth match. (Fig. 2-23)

Adjust the shape of the liquid tube using a tube bender at the installation site and connect it to the liquid tubing side valve using a flare.

Design of 3WAY VRF SYSTEM

Apply refrigerant lubricant

Fig. 2-22

Union

Fig. 2-23

Flare nut

Cautions During Brazing

Replace air inside the tube with nitrogen gas to prevent copper oxide film from forming during the brazing process. (Oxygen, carbon dioxide and Freon are not acceptable.) Do not allow the tubing to get too hot during brazing. The nitrogen gas inside the tubing may overheat, causing refrigerant system valves to become damaged. Therefore allow the tubing to cool when brazing. Use a reducing valve for the nitrogen cylinder. Do not use agents intended to prevent the formation of oxide film. These agents adversely affect the refrigerant and refrigerant oil, and may cause damage or malfunctions.

5-2. Connecting Tubing Between Indoor and

Outdoor Units

(1)

Tightly connect the indoor-side refrigerant tubing extended from the wall with the outdoor-side tubing.

(2)

To fasten the flare nuts, apply specified torque as at right:

When removing the flare nuts from the tubing connections, or when tightening them after connecting the tubing, be sure to use 2 adjustable wrenches or spanners as shown. (Fig. 2-24) If the flare nuts are over-tightened, the flare may be damaged, which could result refrigerant leakage and cause in injury or asphyxiation to room occupants.

For the flare nuts at tubing connections, be sure to use the flare nuts that were supplied with the unit, or else flare nuts for R410A (type 2). The refrigerant tubing that is used must be of the correct wall thickness as shown in the table at right.

Torque wrench

Indoor unit

Outdoor unit

Fig. 2-24

Tube diameter

ø1/4" (ø6.35 mm)

ø3/8" (ø9.52 mm)

ø1/2"(ø12.7 mm)

ø5/8" (ø15.88 mm)

ø3/4" (ø19.05 mm)

Because the pressure is approximately 1.6 times higher than conventional refrigerant pressure, the use of ordinary flare nuts (type 1) or thin-walled tubes may result in tube rupture, injury, or asphyxiation caused by refrigerant leakage.

In order to prevent damage to the flare caused by over-tightening of the flare nuts, use the table above as a guide when tightening.

When tightening the flare nut on the liquid tube, use an adjustable wrench with a nominal handle length of 7-7/8 in.

Tightening torque,

approximate

120 – 160 lbs·inch

(140 – 180 kgf·cm)

300 – 360 lbs·inch

(340 – 420 kgf·cm)

430 – 480 lbs·inch

(490 – 550 kgf·cm)

590 – 710 lbs·inch

(680 – 820 kgf·cm)

870 – 1040 lbs·inch

(1000 – 1200 kgf·cm)

Spanner

Tube thickness

1/32"

(0.8 mm)

1/32"

(0.8 mm)

1/32"

(0.8 mm)

5/128"

(1.0 mm)

over 5/128"

(1.0 mm)

2 - 41

5. HOW TO PROCESS TUBING

Design of 3WAY VRF SYSTEM

5-3. Insulating the Refrigerant Tubing

Tubing Insulation

Thermal insulation must be applied to all unit tubing, including the distribution joint (purchased separately). (Fig. 2-25)

* For gas tubing, the insulation material must be heat

resistant to 248°F or above. For other tubing, it must

be heat resistant to 176°F or above. Insulation material thickness must be 25/64 in. or greater.

If the conditions inside the ceiling exceed DB 86°F and RH 70%, increase the thickness of the gas tubing insulation material by 1 step.

If the exterior of the outdoor

CAUTION

Taping the flare nuts

Wind the white insulation tape around the flare nuts at the gas tube connections. Then cover up the tubing connections with the flare insulator, and fill the gap at the union with the supplied black insulation tape. Finally, fasten the insulator at both ends with the supplied vinyl clamps. (Fig. 2-26)

unit valves has been finished with a square duct covering, make sure you allow sufficient space to use the valves and to allow the panels to be attached and removed.

Two tubes arranged together

Liquid tubing

Three tubes arranged together

Liquid tubing

Insulation

Four tubes arranged together

Discharge tubing

Balance tubing

Sealer (supplied)

Unit side insulator

Flare nut

Insulation

Cosmetic (finishing) tape

Insulation

Fig. 2-25

Insulation tape (white)

(supplied)

Vinyl clamps (supplied)

Fig. 2-26

Gas tubing

Balance tubing

Suction tubing

Liquid tubing

Flare insulator (supplied)

Tube insulator (not supplied) Heat resistant 248°F or above

2 - 42

5. HOW TO PROCESS TUBING

5-4. Taping the Tubes

(1)

At this time, the refrigerant tubes (and electrical wiring if local codes permit) should be taped together with armoring tape in 1 bundle. To prevent the condensation from overflowing the drain pan, keep the drain hose separate from the refrigerant tubing.

(2)

Wrap the armoring tape from the bottom of the outdoor unit to the top of the tubing where it enters the wall. As you wrap the tubing, overlap half of each previous tape turn.

(3)

Clamp the tubing bundle to the wall, using 1 clamp approx. each ft. (Fig. 2-27)

NOTE

Do not wind the armoring tape too tightly since this will decrease the heat insulation effect. Also ensure that the condensation drain hose splits away from the bundle and drips clear of the unit and the tubing.

Design of 3WAY VRF SYSTEM

Insulated tubes

Fig. 2-27

Apply putty here

Clamp

Drain hose

5-5. Finishing the Installation

After finishing insulating and taping over the tubing, use sealing putty to seal off the hole in the wall to prevent rain and draft from entering. (Fig. 2-28)

Tubing

Fig. 2-28

2 - 43

6. AIR PURGING

Design of 3WAY VRF SYSTEM

6. AIR PURGING

Air and moisture in the refrigerant system may have undesirable effects as indicated below.

pressure in the system rises operating current rises cooling (or heating) efficiency drops moisture in the refrigerant circuit may freeze and block capillary tubing water may lead to corrosion of parts in the refrigerant

system Therefore, the indoor unit and tubing between the indoor and outdoor unit must be leak tested and evacuated to remove any noncondensables and moisture from the system.

Air Purging with a Vacuum Pump (for Test Run) Preparation

Check that each tube between the indoor and outdoor units have been properly connected and all wiring for the test run has been completed. Remove the valve caps from all service ports on the outdoor unit. (Fig. 2-30) Note that all service valves on the outdoor unit are kept closed at this stage. The balance tube leak test is not necessary if only 1 outdoor unit is installed.

Manifold gauge

Fig. 2-29a

Flare nut

Pressure gauge

Vacuum pump

Outlet Inlet

Fig. 2-29b

Valve cap

Service port cap

Fig. 2-30

Manifold valve

Lo Hi

Charge hose

Leak test

(1) Attach a manifold valve (with pressure gauges) and

dry nitrogen gas cylinder to all service ports with charge hoses. The balance tube leak test is not necessary if only 1 outdoor unit is installed.

Use a manifold valve for air

CAUTION

(2) Pressurize the system to no more than 450 psig

(31 kgf/cm2G) with dry nitrogen gas and close the cylinder valve when the gauge reading reaches 450 psig (31 kgf / cm2G). Then, test for leaks with liquid soap.

CAUTION

purging. If it is not available, use a stop valve for this purpose. The “Hi” knob of the manifold valve must always be kept closed.

To avoid nitrogen entering the refrigerant system in a liquid state, the top of the cylinder must be higher than the bottom when you pressurize the system. Usually, the cylinder is used in a vertical standing position.

Suction tube

Discharge tube

Liquid tube

Balance tube

Cylinder valve

Open

Fig. 2-31

Nitrogen gas cylinder (In vertical standing position)

Outdoor unit

2 - 44

6. AIR PURGING

(3)

Do a leak test of all joints of the tubing (both indoor and outdoor) and all service valves. Bubbles indicate a leak. Wipe off the soap with a clean cloth after a leak test.

(4)

After the system is found to be free of leaks, relieve the nitrogen pressure by loosening the charge hose connector at the nitrogen cylinder. When the system pressure is reduced to normal, disconnect the hose from the cylinder.

Evacuation

(1) Attach the charge hose end described in the

preceding steps to the vacuum pump to evacuate the tubing and indoor unit. Confirm that the “Lo” knob of the manifold valve is open. Then, run the vacuum pump. The operation time for evacuation varies with the tubing length and capacity of the pump. Evacuation is not necessary for the balance tube if only 1 outdoor unit is installed.

Pressure gauge

Suction tube

Design of 3WAY VRF SYSTEM

Manifold valve

Lo Hi

Vacuum pump

Open

NOTE

The vacuum condition should be less than –14.7 psig (–755 mmHg, 5 Torr).

Discharge tube

Liquid tube

Balance tube

Open

Fig. 2-32

Outdoor unit

2 - 45

6. AIR PURGING

Design of 3WAY VRF SYSTEM

(2) When the desired vacuum is reached, close the “Lo”

knob of the manifold valve and turn off the vacuum pump. Please confirm that the gauge pressure is under –14.7 psig (–755 mmHg, 5 Torr) after 4 to 5 minutes of vacuum pump operation.

Charging additional refrigerant

CAUTION

Use a cylinder designed for use with R410A.

Charging additional refrigerant (calculated from the liquid tube length as shown in Section “Additional Refrigerant Charge (page 2-5)”) using the liquid tube service valve. (Fig. 2-33)

Use a balance or scale to measure the refrigerant accurately.

If the additional refrigerant charge amount cannot be charged at once, charge the remaining refrigerant in liquid form by using the suction tube service valve with the system in Cooling mode at the time of test run. (Fig. 2-34)

Close the valve on the cylinder containing R410A.

Finishing the job

(1)

With a flathead screwdriver, turn the liquid tube service valve counter-clockwise to fully open the valve.

(2)

Turn the all service valve counter-clockwise to fully open the valve.

(3)

Close all stop valves and loosen the “Lo” knob of the manifold valve.

(4)

Loosen the charge hose connected to all service port, then remove the hose.

(5)

Replace all valve caps at all service ports and fasten them securely.

This completes air purging with a vacuum pump. The air conditioner is now ready for a test run.

Pressure gauge

Suction tube

Discharge tube

Liquid tube

Balance tube

Manifold valve

Suction tube

Discharge tube

Lo Hi

Open

Fig. 2-33

Open

Valve

Liquid

R410A

Outdoor unit

Open

Outdoor unit

Open

Liquid tube

Open

Balance tube

Open

Fig. 2-34

2 - 46

7. Optional Parts

7-1. Distribution Joint Kits

CZ-P900PH1U (for R410A)

How to Attach Distribution Joint

1. Accompanying Parts Check the contents of your distribution joint kit.

2. Distribution Joint Kits (with insulation)

Design of 3WAY VRF SYSTEM

CZ-P900PH1U

Suction Tube

300

Distribution Joint

Insulators for both the Suction tube and the Discharge tube are the same.

Suction tube and Discharge tube are similar in sizes and both the tube entrances have the same diameter.

So the both Distribution joints can fit into different tubes. Since the diameter of the tube ends for both Suction and Discharge tube are different, take care not to connect the distribution joint different.See the "#" marks on the above figures.

D E

Insulation

USE:For outdoor unit (Capacity after distribution joint is 90.0kW or less.)

Discharge Tube

300

Reducing Joints

ED C

D E F

Insulation

FDE

Liquid Tube

G F E

340

Insulation

Size of connection point on each part (Shown are inside diameters of tubing)

Size

Inch

Part B

Ø34.92

1-3/8

Part C

Ø28.58

1-1/8

Part D

Ø25.4

Part E

Ø22.22

7/8

Part F

Ø19.05

3/4

Part G

Ø15.88

5/8

Part H

Ø12.7

1/2

Part I

Ø9.52

3/8

GFEEFG

IHIH

Using a tube cutter, cut the joints at the diameter required to match the outside diameter of the tubing you are connecting. (This is usually done at the installation site.) The tube diameter depends on the total capacity of the outdoor unit. Note that you do not have to cut the joints if it already matches the tubing end size. For size selection of the tube diameter, refer to the installation instructions provided with the outdoor unit.

NOTE

Avoid forceful cutting that may harm the shape of the joints or tubing. (Inserting the tubing will not be possible if the tube shape is not proper.)

Stopper(boss)

Cutting point

Cut off as far away from stopper as possible. After cutting the joints, be sure to remove burrs on the inside of the joints. (If the joints have been squashed or dented badly, reshaped them using a tube spreader.) Make sure there is no dirt or other foreign substances inside the distribution joint.

2 - 47

Make this as long as possible.

Insertion length of the connecting tube

7. Optional Parts

The distribution joint can be either horizontal or vertical.

In the case of horizontal, the L-shaped tubing must be slanted slightly upward (15° to 90° ).

Design of 3WAY VRF SYSTEM

15 to 30°

Outdoor unit Side

In case of horizontal position

When brazing, replace air inside the tube with nitrogen gas to prevent copper oxide from forming. To insulate the distribution joint, use the supplied tubing insulation. (If using insulation other than that supplied, make sure that its heat resistance is 248°F or higher.)

For additional details, refer to the installation instructions provided with the outdoor unit.

upward slant

Indoor unit Side

In case of vertical position

(directed upward or downward)

Direction of Distribution Joint

Outdoor unit

Direction of Distribution Joint

Indoor unit

2 - 48

7. Optional Parts

CZ-P224BH1U, CZ-P680BH1U, CZ-P1350BH1U (for R410A)

How to Attach Distribution Joint

1. Accompanying Parts Check the contents of your distribution joint kit.

2. Distribution Joint Kits (with insulation)

Design of 3WAY VRF SYSTEM

CZ-P224BH1U

Suction Tube

Distribution Joint

Insulation Insulation

CZ-P680BH1U

Suction Tube

300

FED C

Insulation

Insulators for both the Suction tube and the Discharge tube are the same.

* *

Suction tube and Discharge tube are similar in sizes and both the tube entrances have the same diameter.

G H

Reducing Joints

USE:For indoor unit(Capacity after distribution joint is greater than 22.4kW and no more than 68.0kW.)

E F G

USE:For Indoor unit(Capacity after distribution joint is 22.4kW or less.)

Discharge Tube

186210 235

DFE

Discharge Tube

DEF

Insulation

300

E F G H

Liquid Tube

I H

Insulation

Liquid Tube

I H

G F E

340

Insulation

HIIH

GFEEFG

Unit:mm

HIHI

CZ-P1350BH1U

USE:For indoor unit(Capacity after distribution joint is greater than 68.0kW and no more than 135.0kW.)

Suction Tube·Discharge Tube

H G

F E D

C A

BBB

Insulation

ECDAFFCDAE

Liquid Tube

I H

G F E

340

Insulation

GFEEFG

HIHI

2 - 49

Unit:mm

Design of 3WAY VRF SYSTEM

7. Optional Parts

Size of connection point on each part (Shown are inside diameters of tubing)

Size Part D E traPA traP H traPB traP Part G Part IF traPC traP

Inch

3. Making Branch Connections

Using a tube cutter,cut the joints at the diameter required to match the outside diameter of the tubing you are connecting. (This is usually done at the installation site.) The tube diameter depends on the total capacity of the indoor unit. Note that you do not have to cut the joints if it already matches the tubing end size. For size selection of the tube diameter, refer to the installation instructions provided with the outdoor unit.

NOTE

Avoid forceful cutting that may harm the shape of the joints or tubing. (Inserting the tubing will not be possible if the tube shape is not proper.)

Cut off as far away from stopper as possible. After cutting the joints,be sure to remove burrs on the inside of the joints.

(If the joints have been squashed or dented badly, reshaped them using a tube spreader.) Make sure there is no dirt or other foreign substances inside the distribution joint.

The distribution joint can be either horizontal or vertical. In the case of horizontal, the L-shaped tubing must be slanted slightly upward (15° to 30°).

Ø25.4 22.22Ø1.83Ø 7.21Ø31.75Ø Ø15.88 Ø9.5250.91Ø85.82Ø

18/72/1-1 2/14/1-1 5/8 3/84/38/1-1

Stopper (boss)

Cutting point

Indoor unit

Outdoor unit Side

In case of horizontal position

When brazing,replace air inside the tube with nitrogen gas to prevent copper oxide from forming.

To insulate the distribution joint, use the supplied tubing insulation. (If using insulation other than that supplied, make sure that its heat resistance is 248˚F or higher.) For additional details, refer to the installation instructions provided with the outdoor unit.

Side

15 to 30°

upward slant

Make this as long as possible.

Insertion length of the connecting tube

In case of vertical position

(directed upward or downward)

2 - 50

7. Optional Parts

7-2. Solenoid Valve Kit for 3WAY VRF System

CZ-P56HR1U, CZ-P160HR1U

For safety installation and trouble-free operation, you must:

Design of 3WAY VRF SYSTEM

WARNING

CAUTION

1. Accessories

Part Name Figure Q'ty Remarks

Washer

Hanging hook

M4 screw ( L=15/32")

Tapping screw ( L=5/16")

Wire holder

3-Way connect wire (6.5ft.)

This symbol refers to a hazard or unsafe practice which can result in severe personal injury or death.

This symbol refers to a hazard or unsafe practice which can result in personal injury or product or property damage.

For hanging bolts

Used to hang the Solenoid Valve Kit

For hanging hook

For Solenoid Valve Relay Kit

For Solenoid Valve Relay Kit wiring

ACC-3WAY-AAB

Solenoid Valve Relay Kit

2. Positioning for Installation

The solenoid valve kit produces some refrigerant noise. If it is to be installed in a quiet place such as a hospital, library or hotel, it is recommended that the solenoid valve kit be installed in the ceiling of a corridor, etc. apart from the room.

Room Room

Indoor unit Indoor unit

Solenoid valve kit

Corridor

Recommended installation

Room Room

Indoor unit Indoor unit

Avoid

Solenoid valve kit

Corridor

2 - 51

7. Optional Parts

Be sure to secure the solenoid valve kit to the structure and the hanging bolts, etc. using the top or side holes of the hanging hooks. Do not place the solenoid valve kit directly on the ceiling surface. When installing the solenoid valve kit,

install it with the top surface facing upward.

(See the figure shown in the subsection "How to use the fittings" in " 3. Valve Dimensions and Hanging Method.")

Provide a service space of 7-7/8" or more in front of the installing site.

Never conduct drilling or welding on the sheet metal.

Place the solenoid valve kit so that it does

not hinder draining. Do not cover air holes.

remember to

Design of 3WAY VRF SYSTEM

Front side

7-7/8" or more

Service space

3. Valve Dimensions and Hanging Method

There are 2 types of solenoid valve kits: type 56 and type 160. The corresponding indoor unit model capacities are shown in the table at right.

Gas tube ID 1/2" ( 5/8" )

1-21/32

3-21/32

4-7/32

Liquid tube ID 1/4" ( 3/8" )

Hanging hook

Holes for suspension bolt ø15/32

5-55/64

Solenoid Valve Kit

CZ-P56HR1U

CZ-P160HR1U

Discharge tube ID 1/2"

Front side

4-21/64 4-21/64 5-55/64

Indoor Unit Capacity

7 -18 Type

24 - 48 Type

63/64

2-31/64

3-15/16

6-29/64

8-15/32

Liquid tube ID 3/8"

Suction tube ID 5/8"

53/64 2-63/64

NOTE

This figure shows the unit with suspension fittings attached.

2 - 52

43/64

1-7/64

Cover of electrical components

7/16

7-41/64

5-55/64

unit : in.

9-29/64

7. Optional Parts

How to use the fittings

Design of 3WAY VRF SYSTEM

Suspension bolt (3/8" or M10) (field supplied)

Nut (field supplied) (3/8" or M10)

Washer

Suspension hook

Install the hanging hook with supplied 4 screws (M4 X 15/32") taking care of the positioning.

CAUTION

4. Wiring, Tubing, and Heat Insulation

1. Refrigerant tubing

Gas tube

Wrong positioning will become unfitted center of gravity position, causing injuries or product damage.

Cool with damp cloth or other means when brazing the joint with a torch. Otherwise, the solenoid valve will be damaged.

M4 screw (M4 × 15/32")

M4 screw (M4 × 15/32" : supplied ) Never use a long screw other than the accessory screw. This may bore a hole through the tube surface, causing refrigerant leakage.

Liquid tube

Discharge tube

Liquid tube

NOTE

When brazing, be sure to perform nitrogen replacement inside the tube so that oxidation coating does not form inside the tube. Then stop performing when nitrogen replacement is completed. The solenoid valve, however, will be damaged if nitrogen is applied during while brazing.

Heat sensitive components, protect from flame and heat conduction. Comply with all Local Code Requirements. Clean base metals throughly. Use proper ventilation to carry fumes away from the work area. Use a high quality silver based solder of at least 15% silver. Heat the base materials broadly and uniformly. Take precautions not to overheat the device which could damage sensitive internal components. Insure compliance with all local codes!

2. Heat Insulation

Be sure to insulate the tubing after finishing leakage inspection. Wrap insulators (field supplied) having a thickness of 25/64" or more with the heat resistance of 248 or more around the discharge tubes and gas tubes, and 176 or more around the suction tubes and liquid tubes. Wrap around the each tube not to make gaps between the thermal insulation. Failure to conduct shielding gaps and thermal insulation will cause water leakage.

Suction tube

2 - 53

7. Optional Parts

Wiring3.

Design of 3WAY VRF SYSTEM

Indoor Unit

Solenoid valve relay kit

Solenoid valve

Control PCB

It requires that the Class wire and Class wire should be separated.

Procedure :

1. Connect the power supply wire to the solenoid valve kit, using the Class wire.

2. Connect the solenoid valve kit to the solenoid valve relay kit, using the Class wire.

3. Connect the solenoid valve relay kit to the indoor unit, using the supplied connect wire.

4. The left-over wires connected to the solenoid valve relay kit should be tied up in a bundle of wires by the supplied wire holder not to leave the wires loose as shown in the diagram at right.

5P connector

3-Way connect wire (6.5ft ) / supplied

1 2 3 4 5

Terminal base

ELECTRICAL BOX

Indoor PCB

Wiring from indoor unit PCB

5 wires / field supplied (Class , 98ft Max.)

Class field supplied

Power

Solenoid valve kit

1 2

1 2 3 4 5

Terminal base

3-Way connect wire (supplied)

5 wires / field supplied (Class , 98ft Max.)

5. Installation to the Solenoid Valve Relay Kit Install the solenoid valve relay kit into the indoor unit and fix it using a Philips-head screwdriver. See the

diagram in the section of "6. Electrical Wiring Diagrams".

WARNING

Do not install outside the building and the area where the water is splashed. Failure to do so could result in product or property damage.

Do not handle or touch the unit with wet hands. Failure to do so could result in electric shock.

2 - 54

Design of 3WAY VRF SYSTEM

7. Optional Parts

Electrical Wiring Diagrams6.

Make sure that the power supply wiring, communication wiring and 3-way wiring will not be crossed each other.

U1 Type

Solenoid valve relay kit

Y1 Type

Solenoid valve relay kit

D1 Type

Only for 3-Way connect wire, fix with a clip.

Bracket

Tapping screws (4 pcs.)

Unscrew the tapping screws and remove the bracket.

Reinstall the bracket with the tapping screws.

Turn 180 degrees (upside-down).

3-Way wiring connector

2 - 55

Design of 3WAY VRF SYSTEM

7. Optional Parts

F1 Type

Solenoid valve relay kit

E1 Type

K1 Type

Solenoid valve relay kit

Put the 3-way connect wire through the eyelet.

For wall-mount type (K1 type), install the solenoid valve relay kit on the wall.

Important: Installation behind the wall or ceiling is required that the maintenance should become capable.

Solenoid valve relay kit

2 - 56

7. Optional Parts

T1 Type

Common use

Model : S-12MT1U6/ S-18MT1U6

Design of 3WAY VRF SYSTEM

Only for 3-Way connect wire, fix with a clip.

3-Way wiring connector

Model : S-24MT1U6

Solenoid Valve Relay Kit

Open the knock-out hole and install the eyelet (Ø1-3/16") supplied with the indoor unit. Then put the 3-way connect wire through the eyelet.

Solenoid Valve Relay Kit

Open the knock-out hole and install the eyelet (Ø1-3/16") supplied with the indoor unit. Then put the 3-way connect wire through the eyelet.

2 - 57

– MEMO –

2 - 58

Contents

3. Control of 3WAY VRF SYSTEM

1. Main Operating Functions

2. Wireless Remote Controller

3. Timer Remote Controller

4. Simpliﬁ ed Remote Controller

5. System Controller

6. Schedule Timer

7. Intelligent Controller (CZ-256ESMC1U)

8. Communication Adaptor (CZ-CFUNC1U)

9. Remote Sensor

10. LonWorks Interface (CZ-CLNC1U)

* Refer to the 2WAY VRF SYSTEM TECHNICAL DATA (TD831157)

Control of 3WAY VRF SYSTEM

3 - 1

– MEMO –

3 - 2

Contents

3WAY VRF SYSTEM Unit Speciﬁ cations

4. 3WAY VRF SYSTEM UNIT SPECIFICATIONS

1. Outdoor Unit ..................................................................................................................... 4-2

1-1. Specifications .............................................................................................................. 4-2

1-2. AHRI Registration Values ........................................................................................ 4-10

1-3. Dimensional Data ..................................................................................................... 4-11

1-4. Multiple Unit Installation Example ............................................................................

1-5. Refrigerant Flow Diagram ..........................................................................................

1-6. Noise Criterion Curves .............................................................................................

4-Way Cassette Type (U1 Type)

2. 4-Way Cassette 60×60 Type (Y1 Type)

3. 1-Way Cassette Type (D1 Type)

4. Low Silhouette Ducted Type (F1 Type)

5. Slim Low Static Ducted Type (M1 Type)

6. High Static Pressure Ducted Type (E1 Type)

7. Ceiling Type (T1 Type)

8. Wall Mounted Type (K1 Type)

10.

Floor Standing Type (P1 Type)

11.

Concealed Floor Standing Type (R1 Type)

12.

Intaking Fresh Air of 4-Way Casstte Type and Slim Low Static Ducted Type

Refer to the 2WAY VRF SYSTEM TECHNICAL DATA (TD831157)

4-12 4-14 4-15

4 - 1

1. Outdoor Unit

3WAY VRF SYSTEM Unit Speciﬁ cations

1-1. Speciﬁ cations

Unit Speciﬁ cations (1)

MODEL NAME MODEL No. SOURCE PERFORMANCE

Cooling capacity BTU / h (kW) 72,000 (21.1) Heating capacity BTU / h (kW) 81,000 (23.7)

Height in. (mm) 82-9/16 (2097)

UNIT DIMENSIONS

Net weight lbs. (kg) 573 (260) Color (Munsell code) Silky shade (1Y 8.5 / 0.5)

ELECTRICAL RATINGS

Voltage rating V 208 230

Cooling

Heating

Starting amperes A 3 3

COMPRESSOR

Type - Q'ty Inverter driven Rotary type x 1 Motor output kW 4.1

Refrigeration oil

Crankcase heater W 25 Capacity control % 10 - 100 % Refrigerant amount at shipment lbs. (kg) Refrigerant control Defrost method Heat exchanger

FAN DEVICE

Type - Q'ty Propeller fan x 1 Air circulation CFM 5,300 External static pressure in.WG 0 Motor output (No. of poles) kW 0.7/8P Protective devices High pressure switch, overcurrent (CT method) TUBING

Refrigerant tubing

Drain port External air temperature operation range °F Cooling: 14 ~ 113 °F (DB) Heating: -4 ~ 59 (WB) Operation sound (Hi) dB-A 54.5 (Quiet mode: 51.5)

Primary accessories

* Outdoor unit model name ended with the letter “E”

Refer to the Section 1 “3. Salt-Air Damage Resistant Specifications.”

*1 If the tubing length (LA) is less than 16.4 feet, it is recommended that the suction tube be increased by 1 rank.

Rated conditions

Performance, electrical characteristics values and operating sound are based on JIS B8616 package A/C.

(Cooling : Indoor intake air temperature 80°F DB / 67°F WB. Outdoor intake air temperature 95°F DB.)

(Heating : Indoor intake air temperature 70°F DB. Outdoor intake air temperature 47°F DB / 43°F WB.)

Width in. (mm) 35 (890)

Depth in. (mm)

Running amperes A 15.1 14.2 Power input kW 5.30 5.30 Power factor % 97.3 93.8 Running amperes A 16.5 15.5 Power input kW 5.79 5.79 Power factor % 97.4 94.0

Type FV68S (Ether oil) Charge amount gal 1.40 (5.3 liters)

Suction tube in. (mm) ø3/4 (ø19.05) Discharge tube in. (mm) ø5/8 (ø15.88) (Brazing) Liquid tube in. (mm) ø3/8 (ø9.52) (Brazing) Balance tube in. (mm) ø3/8 (ø9.52) (Flare nut)

3WAY SYSTEM Capacity Control Outdoor Unit <6-Ton>

U-72MF1U9, U-72MF1U9E*

208-230V/3N/60Hz

Ceiling dimension : 35

Electronic expansion valve

Reverse-cycle defrost, outdoor unit cycle defrost

Aluminum plate fin / Copper tube

ø7/8 (ø22.22) - ø3/4 (ø19.05)

(890)

R410A - 25.9 (11.8)

(Brazing)

–

Connection tubing

4 - 2

1. Outdoor Unit

3WAY VRF SYSTEM Unit Speciﬁ cations

Unit Speciﬁ cations (2)

MODEL NAME MODEL No. SOURCE PERFORMANCE

Cooling capacity BTU / h (kW) 96,000 (28.1) Heating capacity BTU / h (kW) 108,000 (31.6)

Height in. (mm) 82-9/16 (2097)

UNIT DIMENSIONS

Net weight lbs. (kg) 672 (305) Color (Munsell code) Silky shade (1Y 8.5 / 0.5)

ELECTRICAL RATINGS

Voltage rating V 208 230

Cooling

Heating

Starting amperes A 140 136

COMPRESSOR

Type - Q'ty Inverter driven Rotary type x 1 + Fixed Speed Scroll type x 1 Motor output kW 2.7 + 3.75

Refrigeration oil

Crankcase heater W 25 + 32 Capacity control % 8 - 100 % Refrigerant amount at shipment lbs. (kg) Refrigerant control Defrost method Heat exchanger

FAN DEVICE

Type - Q'ty Propeller fan x 1 Air circulation CFM 5,650 External static pressure in.WG 0 Motor output (No. of poles) kW 0.7/8P Protective devices High pressure switch, overcurrent (CT method) TUBING

Refrigerant tubing

Drain port External air temperature operation range °F Cooling: 14 ~ 113 °F (DB) Heating: -4 ~ 59 (WB) Operation sound (Hi) dB-A 55.0 (Quiet mode: 52.0)

Primary accessories

* Outdoor unit model name ended with the letter “E” Refer to the Section 1 “3. Salt-Air Damage Resistant Specifications.” *1 If the tubing length (LA) is less than 16.4 feet, it is recommended that the suction tube be increased by 1 rank. Rated conditions

Performance, electrical characteristics values and operating sound are based on JIS B8616 package A/C. (Cooling : Indoor intake air temperature 80°F DB / 67°F WB. Outdoor intake air temperature 95°F DB.) (Heating : Indoor intake air temperature 70°F DB. Outdoor intake air temperature 47°F DB / 43°F WB.)

Width in. (mm) 35 (890)

Depth in. (mm)

Running amperes A 23.2 21.6 Power input kW 7.75 7.75 Power factor % 92.8 90.2 Running amperes A 25.4 23.7 Power input kW 8.60 8.60 Power factor % 94.0 91.2

Type FV68S (Ether oil) Charge amount gal 1.96 (7.4 liters)

Suction tube in. (mm) ø7/8 (ø22.22) Discharge tube in. (mm) ø3/4 (ø19.05) (Brazing) Liquid tube in. (mm) ø3/8 (ø9.52) (Brazing) Balance tube in. (mm) ø3/8 (ø9.52) (Flare nut)

3WAY SYSTEM Capacity Control Outdoor Unit <8-Ton>

U-96MF1U9, U-96MF1U9E*

208-230V/3N/60Hz

Ceiling dimension : 35

Electronic expansion valve

Reverse-cycle defrost, outdoor unit cycle defrost

Aluminum plate fin / Copper tube

ø1-1/8 (ø28.58) - ø3/4 (ø19.05)

ø7/8 (ø22.22) - ø3/4 (ø19.05) ø3/4 (ø19.05) - ø5/8 (ø15.88)

4 - 3

(890)

R410A - 25.9 (11.8)

(Brazing)

–

Connection tubing

1. Outdoor Unit

3WAY VRF SYSTEM Unit Speciﬁ cations

Unit Speciﬁ cations (3)

MODEL NAME GENERAL MODEL No. COMPONENT OUTDOOR UNIT SOURCE PERFORMANCE

Cooling capacity BTU / h (kW) 144,000 (42.2) Heating capacity BTU / h (kW) 162,000 (47.3)

Height in. (mm) 82-9/16 (2097)

UNIT DIMENSIONS

Net weight lbs. (kg) 573 (260) 573 (260) Color (Munsell code) Silky shade (1Y 8.5 / 0.5)

ELECTRICAL RATINGS

Voltage rating V 208 230

Cooling

Heating

Starting amperes A 20 19

COMPRESSOR

Type - Q'ty Motor output kW 4.1 4.1

Refrigeration oil

Crankcase heater W 25 25 Capacity control % – Refrigerant amount at shipment lbs. (kg) Refrigerant control Defrost method Heat exchanger

FAN DEVICE

Type - Q'ty Propeller fan x 1 Propeller fan x 1 Air circulation CFM 5,300 5,300 External static pressure in.WG 0 0 Motor output (No. of poles) kW 0.7/8P 0.7/8P Protective devices High pressure switch, overcurrent (CT method) TUBING

Refrigerant tubing

Drain port External air temperature operation range °F Cooling: 14 ~ 113 °F (DB) Heating: -4 ~ 59 (WB) Operation sound (Hi) dB-A 58.0 (Quiet mode: 55.0)

Primary accessories

* Outdoor unit model name ended with the letter “E”

Refer to the Section 1 “3. Salt-Air Damage Resistant Specifications.” *1 If the tubing length (LA) is less than 16.4 feet, it is recommended that the suction tube be increased by 1 rank. Rated conditions

Performance, electrical characteristics values and operating sound are based on JIS B8616 package A/C.

(Cooling : Indoor intake air temperature 80°F DB / 67°F WB. Outdoor intake air temperature 95°F DB.)

(Heating : Indoor intake air temperature 70°F DB. Outdoor intake air temperature 47°F DB / 43°F WB.)

Width in. (mm) 74 (1880)

Depth in. (mm)

Running amperes A 30.2 28.4 Power input kW 10.6 10.6 Power factor % 97.3 93.8 Running amperes A 33.0 30.9 Power input kW 11.6 11.6 Power factor % 97.4 94.0

Type FV68S (Ether oil) Charge amount gal 1.40 (5.3 liters) 1.40 (5.3 liters)

Suction tube in. (mm) ø1-1/8 (ø28.58) (Brazing) Discharge tube in. (mm) ø7/8 (ø22.22) (Brazing) Liquid tube in. (mm) ø1/2 (ø12.7) (Brazing) Balance tube in. (mm) ø3/8 (ø9.52) (Flare nut)

3WAY SYSTEM Capacity Control Outdoor Unit <12-Ton>

WU-144MF1U9, WU-144MF1U9E

U-72MF1U9, U-72MF1U9E* U-72MF1U9, U-72MF1U9E*

208-230V/3N/60Hz 208-230V/3N/60Hz

Ceiling dimension : 35 ~ +2-3/8

Inverter driven Rotary type x 1 Inverter driven Rotary type x 1

R410A - 25.9 (11.8) R410A - 25.9 (11.8)

Reverse-cycle defrost, outdoor unit cycle defrost

Aluminum plate fin / Copper tube

Connection tubing

ø7/8 (ø22.22) - ø3/4 (ø19.05)

4 - 4

(890 ~ +60)

Electronic expansion valve

–

Connection tubing

ø7/8 (ø22.22) - ø3/4 (ø19.05)

1. Outdoor Unit

3WAY VRF SYSTEM Unit Speciﬁ cations

Unit Speciﬁ cations (4)

MODEL NAME GENERAL MODEL No. COMPONENT OUTDOOR UNIT SOURCE PERFORMANCE

Cooling capacity BTU / h (kW) 168,000 (49.2) Heating capacity BTU / h (kW) 189,000 (55.4)

Height in. (mm) 82-9/16 (2097)

UNIT DIMENSIONS

Net weight lbs. (kg) 573 (260) 672 (305) Color (Munsell code) Silky shade (1Y 8.5 / 0.5)

ELECTRICAL RATINGS

Voltage rating V 208 230

Cooling

Heating

Starting amperes A 157 152

COMPRESSOR

Type - Q'ty

Motor output kW 4.1 2.7 + 3.75

Refrigeration oil

Crankcase heater W 25 25 + 32 Capacity control % – Refrigerant amount at shipment lbs. (kg) Refrigerant control Defrost method Heat exchanger

FAN DEVICE

Type - Q'ty Propeller fan x 1 Propeller fan x 1 Air circulation CFM 5,300 5,650 External static pressure in.WG 0 0 Motor output (No. of poles) kW 0.7/8P 0.7/8P Protective devices High pressure switch, overcurrent (CT method) TUBING

Refrigerant tubing

Drain port External air temperature operation range °F Cooling: 14 ~ 113 °F (DB) Heating: -4 ~ 59 (WB) Operation sound (Hi) dB-A 58.0 (Quiet mode: 55.0)

Primary accessories

* Outdoor unit model name ended with the letter “E”

Refer to the Section 1 “3. Salt-Air Damage Resistant Specifications.” *1 If the tubing length (LA) is less than 16.4 feet, it is recommended that the suction tube be increased by 1 rank.

Rated conditions

Width in. (mm) 74 (1880)

Depth in. (mm)

Running amperes A 38.3 35.8 Power input kW 13.1 13.1 Power factor % 94.6 91.6

Running amperes A 41.9 39.1 Power input kW 14.4 14.4 Power factor % 95.4 92.3

Type FV68S (Ether oil) Charge amount gal 1.40 (5.3 liters) 1.96 (7.4 liters)

Suction tube in. (mm) ø1-1/8 (ø28.58) (Brazing) Discharge tube in. (mm) ø7/8 (ø22.22) (Brazing) Liquid tube in. (mm) ø5/8 (ø15.88) (Brazing) Balance tube in. (mm) ø3/8 (ø9.52) (Flare nut)

3WAY SYSTEM Capacity Control Outdoor Unit <14-Ton>

WU-168MF1U9, WU-168MF1U9E

U-72MF1U9, U-72MF1U9E* U-96MF1U9, U-96MF1U9E*

208-230V/3N/60Hz 208-230V/3N/60Hz

Ceiling dimension : 35 ~ +2-3/8

Inverter driven Rotary type x 1

R410A - 25.9 (11.8) R410A - 25.9 (11.8)

Reverse-cycle defrost, outdoor unit cycle defrost

Aluminum plate fin / Copper tube

Connection tubing

ø7/8 (ø22.22) - ø3/4 (ø19.05)

4 - 5

(890 ~ +60)

Inverter driven Rotary type x 1

+ Fixed Speed Scroll type x 1

Electronic expansion valve

–

Connection tubing

ø1-1/8 (ø28.58) - ø3/4 (ø19.05)

ø7/8 (ø22.22) - ø3/4 (ø19.05) ø3/4 (ø19.05) - ø5/8 (ø15.88)

1. Outdoor Unit

3WAY VRF SYSTEM Unit Speciﬁ cations

Unit Speciﬁ cations (5)

MODEL NAME GENERAL MODEL No. COMPONENT OUTDOOR UNIT SOURCE PERFORMANCE

Cooling capacity BTU / h (kW) 216,000 (63.3) Heating capacity BTU / h (kW) 243,000 (71.1)

Height in. (mm) 82-9/16 (1887)

UNIT DIMENSIONS

Net weight lbs. (kg) 573 (260) 573 (260) 573 (260) Color (Munsell code) Silky shade (1Y 8.5 / 0.5)

ELECTRICAL RATINGS

Voltage rating V 208 230

Cooling

Heating

Starting amperes A 36 34

COMPRESSOR

Type - Q'ty Motor output kW 4.1 4.1 4.1

Refrigeration oil

Crankcase heater W 25 25 25 Capacity control % – Refrigerant amount at shipment lbs. (kg) Refrigerant control Defrost method Heat exchanger

FAN DEVICE

Type - Q'ty Propeller fan x 1 Propeller fan x 1 Propeller fan x 1 Air circulation CFM 5,300 5,300 5,300 External static pressure in.WG 0 0 0 Motor output (No. of poles) kW 0.7/8P 0.7/8P 0.7/8P Protective devices High pressure switch, overcurrent (CT method) TUBING

Refrigerant tubing

Drain port External air temperature operation range °F Cooling: 14 ~ 113 °F (DB) Heating: -4 ~ 59 (WB) Operation sound (Hi) dB-A 58.0 (Quiet mode: 55.0)

Primary accessories

* Outdoor unit model name ended with the letter “E”

Refer to the Section 1 “3. Salt-Air Damage Resistant Specifications.”

*1 If the tubing length (LA) is less than 16.4 feet, it is recommended that the suction tube be increased by 1 rank. Rated conditions

Width in. (mm) 113 (2870)

Depth in. (mm)

Running amperes A 45.4 42.5 Power input kW 15.9 15.9 Power factor % 97.3 93.8 Running amperes A 49.5 46.4 Power input kW 17.4 17.4 Power factor % 97.4 94.0

Type FV68S (Ether oil) Charge amount gal 1.40 (5.3 liters) 1.40 (5.3 liters) 1.40 (5.3 liters)

Suction tube in. (mm) ø1-3/8 (ø34.92) (Brazing) Discharge tube in. (mm) ø1-1/8 (ø28.58) (Brazing) Liquid tube in. (mm) ø5/8 (ø15.88) (Brazing) Balance tube in. (mm) ø3/8 (ø9.52) (Flare nut)

3WAY SYSTEM Capacity Control Outdoor Unit <18-Ton>

WU-216MF1U9, WU-216MF1U9E

U-72MF1U9(E*) U-72MF1U9(E*) U-72MF1U9(E*)

208-230V/3N/60Hz 208-230V/3N/60Hz 208-230V/3N/60Hz

Ceiling dimension : 35 ~ +2-3/8

Inverter driven Rotary type x 1 Inverter driven Rotary type x 1 Inverter driven Rotary type x 1

R410A - 25.9 (11.8) R410A - 25.9 (11.8) R410A - 25.9 (11.8)

Reverse-cycle defrost, outdoor unit cycle defrost

Aluminum plate fin / Copper tube

Connection tubing

ø7/8 (ø22.22) – ø3/4 (ø19.05)

4 - 6

(890 ~ +60)

Electronic expansion valve

–

Connection tubing

ø7/8 (ø22.22) – ø3/4 (ø19.05)

Connection tubing

ø7/8 (ø22.22) – ø3/4 (ø19.05)

1. Outdoor Unit

3WAY VRF SYSTEM Unit Speciﬁ cations

Unit Speciﬁ cations (6)

MODEL NAME GENERAL MODEL No. COMPONENT OUTDOOR UNIT SOURCE PERFORMANCE

Cooling capacity BTU / h (kW) 240,000 (70.3) Heating capacity BTU / h (kW) 270,000 (79.1)

Height in. (mm) 82-9/16 (2097)

UNIT DIMENSIONS

Net weight lbs. (kg) 672 (305) 573 (260) 573 (260) Color (Munsell code) Silky shade (1Y 8.5 / 0.5)

ELECTRICAL RATINGS

Voltage rating V 208 230

Cooling

Heating

Starting amperes A 173 167

COMPRESSOR

Type - Q'ty

Motor output kW 2.7 + 3.75 4.1 4.1

Refrigeration oil

Crankcase heater W 25 + 32 25 25 Capacity control % – Refrigerant amount at shipment lbs. (kg) Refrigerant control Defrost method Heat exchanger

FAN DEVICE

Type - Q'ty Propeller fan x 1 Propeller fan x 1 Propeller fan x 1 Air circulation CFM 5,650 5,300 5,300 External static pressure in.WG 0 0 0 Motor output (No. of poles) kW 0.7/8P 0.7/8P 0.7/8P Protective devices High pressure switch, overcurrent (CT method) TUBING

Refrigerant tubing

Drain port External air temperature operation range °F Cooling: 14 ~ 113 °F (DB) Heating: -4 ~ 59 (WB) Operation sound (Hi) dB-A 58.0 (Quiet mode: 55.0)

Primary accessories

Rated conditions

Width in. (mm) 113 (2870)

Depth in. (mm)

Running amperes A 53.4 49.9 Power input kW 18.4 18.4 Power factor % 95.4 92.2 Running amperes A 58.4 54.6 Power input kW 20.2 20.2 Power factor % 95.9 92.8

Type FV68S (Ether oil) Charge amount gal 1.96 (7.4 liters) 1.40 (5.3 liters) 1.40 (5.3 liters)

Suction tube in. (mm) ø1-3/8 (ø34.92) (Brazing) Discharge tube in. (mm) ø1-1/8 (ø28.58) (Brazing) Liquid tube in. (mm) ø3/4 (ø19.05) (Brazing) Balance tube in. (mm) ø3/8 (ø9.52) (Flare nut)

3WAY SYSTEM Capacity Control Outdoor Unit <20-Ton>

WU-240MF1U9, WU-240MF1U9E

U-96MF1U9(E*) U-72MF1U9(E*) U-72MF1U9(E*)

208-230V/3N/60Hz 208-230V/3N/60Hz 208-230V/3N/60Hz

Ceiling dimension : 35 ~ +2-3/8

Inverter driven Rotary type x 1

+ Fixed Speed Scroll type x 1

R410A - 25.9 (11.8) R410A - 25.9 (11.8) R410A - 25.9 (11.8)

Reverse-cycle defrost, outdoor unit cycle defrost

Aluminum plate fin / Copper tube

Connection tubing

ø1-1/8 (ø28.58) - ø3/4 (ø19.05) ø7/8 (ø22.22) - ø3/4 (ø19.05) ø3/4 (ø19.05) - ø5/8 (ø15.88)

4 - 7

(890 ~ +60)

Inverter driven Rotary type x 1 Inverter driven Rotary type x 1

Electronic expansion valve

–

Connection tubing

ø7/8 (ø22.22) - ø3/4 (ø19.05)

Connection tubing

ø7/8 (ø22.22) - ø3/4 (ø19.05)

1. Outdoor Unit

3WAY VRF SYSTEM Unit Speciﬁ cations

Unit Speciﬁ cations (7)

MODEL NAME GENERAL MODEL No. COMPONENT OUTDOOR UNIT SOURCE PERFORMANCE

Cooling capacity BTU / h (kW) 264,000 (77.4) Heating capacity BTU / h (kW) 297,000 (87.0)

Height in. (mm) 82-9/16 (2097)

UNIT DIMENSIONS

Net weight lbs. (kg) 672 (305) 672 (305) 573 (260) Color (Munsell code) Silky shade (1Y 8.5 / 0.5)

Width in. (mm) 113 (2870)

Depth in. (mm)

ELECTRICAL RATINGS

Voltage rating V 208 230

Running amperes A 61.5 57.3

Cooling

Heating

Starting amperes A 182 175

Power input kW 20.8 20.8 Power factor % 93.9 91.1 Running amperes A 67.3 62.8 Power input kW 23.0 23.0 Power factor % 94.9 91.9

COMPRESSOR

Type - Q'ty

Motor output kW 2.7 + 3.75 2.7 + 3.75 4.1

Refrigeration oil

Crankcase heater W 25 + 32 25 + 32 25 Capacity control % – Refrigerant amount at shipment lbs. (kg) Refrigerant control Defrost method Heat exchanger

Type FV68S (Ether oil) Charge amount gal 1.96 (7.4 liters) 1.96 (7.4 liters) 1.40 (5.3 liters)

FAN DEVICE

Type - Q'ty Propeller fan x 1 Propeller fan x 1 Propeller fan x 1 Air circulation CFM 5,650 5,650 5,300 External static pressure in.WG 0 0 0 Motor output (No. of poles) kW 0.7/8P 0.7/8P 0.7/8P Protective devices High pressure switch, overcurrent (CT method) TUBING

Suction tube in. (mm) ø1-3/8 (ø34.92) (Brazing)

Refrigerant tubing

Drain port External air temperature operation range °F Cooling: 14 ~ 113 °F (DB) Heating: -4 ~ 59 (WB) Operation sound (Hi) dB-A 58.0 (Quiet mode: 55.0)

Primary accessories

Rated conditions

Discharge tube in. (mm) ø1-1/8 (ø28.58) (Brazing) Liquid tube in. (mm) ø3/4 (ø19.05) (Brazing) Balance tube in. (mm) ø3/8 (ø9.52) (Flare nut)

3WAY SYSTEM Capacity Control Outdoor Unit <22-Ton>

WU-264MF1U9, WU-264MF1U9E

U-96MF1U9(E*) U-96MF1U9(E*) U-72MF1U9(E*)

208-230V/3N/60Hz 208-230V/3N/60Hz 208-230V/3N/60Hz

Ceiling dimension : 35 ~ +2-3/8

Inverter driven Rotary type x 1

+ Fixed Speed Scroll type x 1

R410A - 25.9 (11.8) R410A - 25.9 (11.8) R410A - 25.9 (11.8)

Reverse-cycle defrost, outdoor unit cycle defrost

Aluminum plate fin / Copper tube

Connection tubing

ø1-1/8 (ø28.58) - ø3/4 (ø19.05) ø7/8 (ø22.22) - ø3/4 (ø19.05) ø3/4 (ø19.05) - ø5/8 (ø15.88)

4 - 8

(890 ~ +60)

Inverter driven Rotary type x 1

+ Fixed Speed Scroll type x 1

Electronic expansion valve

–

Connection tubing

ø1-1/8 (ø28.58) - ø3/4 (ø19.05)

ø7/8 (ø22.22) - ø3/4 (ø19.05) ø3/4 (ø19.05) - ø5/8 (ø15.88)

Inverter driven Rotary type x 1

Connection tubing

ø7/8 (ø22.22) - ø3/4 (ø19.05)

1. Outdoor Unit

3WAY VRF SYSTEM Unit Speciﬁ cations

Unit Speciﬁ cations (8)

MODEL NAME GENERAL MODEL No. COMPONENT OUTDOOR UNIT SOURCE PERFORMANCE

Cooling capacity BTU / h (kW) 288,000 (84.4) Heating capacity BTU / h (kW) 324,000 (94.9)

Height in. (mm) 82-9/16 (2097)

UNIT DIMENSIONS

Net weight lbs. (kg) 672 (305) 672 (305) 672 (305) Color (Munsell code) Silky shade (1Y 8.5 / 0.5)

Width in. (mm) 113 (2870)

Depth in. (mm)

ELECTRICAL RATINGS

Voltage rating V 208 230

Running amperes A 69.5 64.7

Cooling

Heating

Starting amperes A 191 183

Power input kW 23.3 23.3 Power factor % 92.8 90.2 Running amperes A 76.2 71.0 Power input kW 25.8 25.8 Power factor % 94.0 91.2

COMPRESSOR

Type - Q'ty

Motor output kW 2.7 + 3.75 2.7 + 3.75 2.7 + 3.75

Refrigeration oil

Crankcase heater W 25 + 32 25 + 32 25 + 32 Capacity control % – Refrigerant amount at shipment lbs. (kg) Refrigerant control Defrost method Heat exchanger

Type FV68S (Ether oil) Charge amount gal 1.96 (7.4 liters) 1.96 (7.4 liters) 1.96 (7.4 liters)

FAN DEVICE

Type - Q'ty Propeller fan x 1 Propeller fan x 1 Propeller fan x 1 Air circulation CFM 5,650 5,650 5,650 External static pressure in.WG 0 0 0 Motor output (No. of poles) kW 0.7/8P 0.7/8P 0.7/8P Protective devices High pressure switch, overcurrent (CT method) TUBING

Suction tube in. (mm) ø1-3/8 (ø34.92) (Brazing)

Refrigerant tubing

Drain port External air temperature operation range °F Cooling: 14 ~ 113 °F (DB) Heating: -4 ~ 59 (WB) Operation sound (Hi) dB-A 58.0 (Quiet mode: 55.0)

Primary accessories

* Outdoor unit model name ended with the letter “E” Refer to the Section 1 “3. Salt-Air Damage Resistant Specifications.”

*1 If the tubing length (LA) is less than 16.4 feet, it is recommended that the suction tube be increased by 1 rank. Rated conditions

Discharge tube in. (mm) ø1-1/8 (ø28.58) (Brazing) Liquid tube in. (mm) ø3/4 (ø19.05) (Brazing) Balance tube in. (mm) ø3/8 (ø9.52) (Flare nut)

3WAY SYSTEM Capacity Control Outdoor Unit <24-Ton>

WU-288MF1U9, WU-288MF1U9E

U-96MF1U9(E*) U-96MF1U9(E*) U-96MF1U9(E*)

208-230V/3N/60Hz 208-230V/3N/60Hz 208-230V/3N/60Hz

Ceiling dimension : 35 ~ +2-3/8

Inverter driven Rotary type x 1

+ Fixed Speed Scroll type x 1

R410A - 25.9 (11.8) R410A - 25.9 (11.8) R410A - 25.9 (11.8)

Reverse-cycle defrost, outdoor unit cycle defrost

Aluminum plate fin / Copper tube

Connection tubing

ø1-1/8 (ø28.58) - ø3/4 (ø19.05) ø7/8 (ø22.22) - ø3/4 (ø19.05) ø3/4 (ø19.05) - ø5/8 (ø15.88)

4 - 9

(890 ~ +60)

Inverter driven Rotary type x 1

+ Fixed Speed Scroll type x 1

Electronic expansion valve

–

Connection tubing

ø1-1/8 (ø28.58) - ø3/4 (ø19.05) ø7/8 (ø22.22) - ø3/4 (ø19.05) ø3/4 (ø19.05) - ø5/8 (ø15.88)

Inverter driven Rotary type x 1

+ Fixed Speed Scroll type x 1

Connection tubing

ø1-1/8 (ø28.58) - ø3/4 (ø19.05) ø7/8 (ø22.22) - ø3/4 (ø19.05) ø3/4 (ø19.05) - ø5/8 (ø15.88)

1. Outdoor Unit

1-2. AHRI Registration Values

3WAY VRF SYSTEM Unit Speciﬁ cations

Outdoor Unit

Models

U-72MF1U9(E)

U-96MF1U9(E)

WU-144MF1U9(E)

WU-168MF1U9(E)

WU-216MF1U9(E)

Indoor Unit

Types

Ducted

Non Ducted

Mixed Non-Ducted and Duced

Ducted

Non Ducted

Mixed Non-Ducted and Duced

Ducted

Non Ducted

Mixed Non-Ducted and Duced

Ducted

Non Ducted

Mixed Non-Ducted and Duced

Ducted

Non Ducted

Cooling Capacity

BTU/h 95°F

72,000 81,000 47,00011.4 3.50 2.2816.4

198,000 220,000 120,00010.5 3.21 2.0516.6

EER IEER

Heating

Capacity

BTU/h

HI COP

47°F

Low

Heating

Capacity

BTU/h

Low COP SCHE

17°F

24.0

24.769,000 77,000 42,00010.9 3.31 2.2517.1

24.471,000 79,500 44,50011.2 3.41 2.2716.8

23.195,000 106,000 69,00011.0 3.30 2.2516.0

23.593,000 103,000 58,50010.9 3.31 2.2516.7

23.394,000 104,500 63,50011.0 3.31 2.2516.4

23.1138,000 156,000 93,00010.8 3.21 2.0516.4

23.8136,000 150,000 83,00010.9 3.31 2.2517.1

23.5137,000 153,000 88,00010.9 3.26 2.1516.8

22.6164,000 184,000 114,00010.7 3.21 2.0516.1

23.3160,000 178,000 98,00010.5 3.21 2.0516.9

23.0162,000 181,000 106,00010.6 3.21 2.0516.5

22.2202,000 228,000 136,00010.6 3.21 2.0516.0

22.9

WU-240MF1U9(E)

WU-264MF1U9(E)

WU-288MF1U9(E)

Mixed Non-Ducted and Duced

Ducted

Non Ducted

Mixed Non-Ducted and Duced

Ducted

Non Ducted

Mixed Non-Ducted and Duced

Ducted

Non Ducted

Mixed Non-Ducted and Duced

220,000 246,000 136,00010.5 3.21 2.0516.4

252,000 268,000 150,0009.4 3.21 2.0516.3

274,000 292,000 164,0009.4 3.21 2.0516.2

22.6200,000 224,000 128,00010.6 3.21 2.0516.3

22.0230,000 264,000 158,00010.5 3.21 2.0516.0

22.4

22.2225,000 255,000 147,00010.5 3.21 2.0516.2

21.6258,000 288,000 176,0009.7 3.21 2.0515.9

22.0

21.8255,000 278,000 163,0009.6 3.21 2.0516.1

21.2280,000 312,000 194,0009.6 3.21 2.0515.8

21.6

21.4277,000 302,000 179,0009.5 3.21 2.0516.0

4 - 10

1. Outdoor Unit

1-3. Dimensional Data

U-72MF1U9, U-72MF1U9E, U-96MF1U9, U-96MF1U9E

U-72MF1U9 U-72MF1U9E

(6-Ton) (8-Ton)

3/4" (

Refrigerant tube (gas tube)

Refrigerant tube (discharge tube)

Refrigerant tube (liquid tube)

Refrigerant tube (balance tube)

Installation holes (4 –19/32" × 25/32" elongated holes), anchor bolts M12 or 15/32" or larger

Refrigerant port (front: knock-out hole and slit)

Refrigerant port (bottom: slit hole)

Electrical wiring port (front: ø2-23/64", ø1-7/64" knock-out holes – for conduit connection)

Electrical wiring port (bottom:ø2-23/64", ø1-1/2" knock-out holes – for conduit connection)

Pressure outlet port (for high pressure: ø5/16" (ø7.94) Schrader-type connection)

Pressure outlet port (for low pressure: ø5/16" (ø7.94) Schrader-type connection)

Knock-out hole for connecting pressure gauge (optional)

brazed connection brazed connection brazed connection flared connection

19.05) 5/8" (ø15.88) 3/4" (ø19.05)

3/8" (ø9.52) 3/8" (ø9.52)

9.52) 3/8" (ø9.52)

3/8" (

unit : in.(mm)

U-96MF1U9 U-96MF1U9E

7/8" (ø22.22)

3WAY VRF SYSTEM Unit Speciﬁ cations

Air intake

31-1/8

(Installation hole pitch)

(Ceiling panel dimensions)

Air intake

Air discharge

Air intake

(Ceiling panel dimensions)

Top view

unit : in.

37-1/2

36-1/4

(Installation hole pitch)

(Maximum dimensions)

13-37/64

1-31/32

9-61/64

Position of refrigerant connection

Position of installation

(Knock-out hole)

1-1/2

(Knock-out hole)

Left side

2-23/64

37-13/32

(Bottom plate dimension)

34-9/64

(Bottom plate dimension)

Z view

(8-1/2)

82-9/16

74-1/16

31-19/64

6-59/64

Space for creation of hole on-site

(Max. diameter

17-51/64

14-1/4

9-1/16

13/64

ø1-57/64)

5-1/8

4-39/64

3-15/16

Table of Measurements for Refrigerant Tube Connection

Equivalent tonnage

6-Ton

1-31/32

8-Ton

Measurements for 8-Ton assume that the supplied connection tubing is used.

4 - 11

6-11/32

Front view

1-31/32

mounting surface

Installation bracket

(1-33/64)

Enlarged view of A

abcde

10-25/32

10-1/8

(257)

6-37/64

(167)

(274)

6-27/32

(174)

13-5/16

18-5/8

2-11/64

8-47/64

(19/32)

Size in. (mm)

12-29/32

(328)

12-29/32

(328)

2-29/32

3-35/64

(90)

3-35/64

(90)

4-39/64

5-63/64

(152)

5-63/64

(152)

8-17/64

(210)

8-17/64

(210)

1. Outdoor Unit

3WAY VRF SYSTEM Unit Speciﬁ cations

1-4. Multiple Unit Installation Example

Equivalent tonnage

12-Ton

14-Ton

6-Ton

U-72MF1U9 U-72MF1U9E

8-Ton

U-96MF1U9 U-96MF1U9E

(8-1/2)

82-9/16

74-1/16

74 (Ceiling panel dimensions)

(Ceiling panel dimensions)

31-1/8

(Installation hole pitch)

70-1/8

(Ceiling panel dimensions)

7-7/8

31-1/8

(Installation hole pitch)

36-1/4

(Ceiling panel dimensions)

Top view

37-1/2

(Installation hole pitch)

(Maximum dimensions)

unit: in.

Equivalent tonnage

18-Ton

20-Ton

22-Ton

24-Ton

6-Ton

U-72MF1U9 U-72MF1U9E

31-19/64

Left side Right sideFront view

113 (Ceiling panel dimensions)

8-Ton

U-96MF1U9 U-96MF1U9E

(8-1/2)

(Ceiling panel dimensions)

(Installation hole pitch)

7-7/8 7-7/831-1/8

109-1/16 (Installation hole pitch)

(Ceiling panel dimensions)

31-1/8

(Installation hole pitch)

(Ceiling panel dimensions)

31-1/8

(Installation hole pitch)

36-1/4

(Ceiling panel dimensions)

Top view

37-1/2

(Installation hole pitch)

(Maximum dimensions)

82-9/16

74-1/16

31-19/64

Left side Right sideFront view

4 - 12

1. Outdoor Unit

Position of center of gravity

3WAY VRF SYSTEM Unit Speciﬁ cations

MODEL

(Ceiling panel dimensions)

37-1/2

36-1/4

(Installation hole pitch)

(Maximum dimensions)

Position of center

Weight

lbs (kg)

in. (mm)

of gravity

U-72MF1U9 U-72MF1U9E

15-3/8

(392)

17-3/4

(452)

33-5/8

(853)

573

(260)

U-96MF1U9 U-96MF1U9E

13-1/4

(336)

18-7/8

(481)

30-1/4

(767)

683

(310)

(8-1/2)

82-9/16

74-1/16

31-1/8

(Installation hole pitch)

(Ceiling panel dimensions)

Top view

31-19/64

1-47/64

31-7/64 34-9/16

Front view

4 - 13

Right side

unit : in.

1. Outdoor Unit

1-5. Refrigerant Flow Diagram

U-72MF1U9, U-72MF1U9E

Solenoid valve

Oil separator

Oil drain

High pressure switch

Solenoid valve

4-way valve

Solenoid valve

4-way valve

Solenoid valve

3WAY VRF SYSTEM Unit Speciﬁ cations

LPS

Low pressure sensor

To be brazed pinch after oil is inserted. (1 portion)

Accumulator

HPS

High Pressure sensor

Fusible plug

Thermistor position

Strainer

For LP

For HP

Balance tube

ø3/8" flare connection

Suction tube ø3/4" Brazing

Discharge tube

ø5/8" Brazing

Narrow tube

ø3/8" Brazing

Outside air

Electronic control valv

U-96MF1U9, U-96MF1U9E

High pressure switch

Solenoid valve

Oil separator

Oil drain

Solenoid valve

Outside air

Electronic control valve

Solenoid valve

4-way

valve

Solenoid valve

4-way valve

Solenoid valve

Fusible plug

LPS

Low pressure sensor

o be brazed pinch

T after oil is inserted. (1 portion)

Accumulator

HPS

High Pressure sensor

Thermistor position

Strainer

For LP

For HP

Balance tube

ø3/8" flare connection

Suction tube ø7/8" Brazing (Use supplied only)

Discharge tube

ø3/4" Brazing (Use supplied only)

Narrow tube

Fusible plug

ø3/8" Brazing

Electronic control valve

Fusible

plug

Electronic control valve

4 - 14

1. Outdoor Unit

1-6. Noise Criterion Curves

3WAY VRF SYSTEM Unit Speciﬁ cations

MODEL

SOUND LEVEL

dB(A)

(Cooling/Heating)

CONDITION

Approximate minimum audible limit for continuous noise

Overall

Octave Band Level (dB)

63 125 250 500 1000 2000 4000 8000

U-72MF1U9, U-72MF1U9E

54.5

(Quiet mode 51.5)

3.3 ft front at height of 4.9 ft

Frequency at center of octave band (Hz)

60Hz

Standard mode

Quiet mode

MODEL

SOUND LEVEL

dB(A)

(Cooling/Heating)

CONDITION

Approximate minimum audible limit for continuous noise

Overall

Octave Band Level (dB)

63 125 250 500 1000 2000 4000 8000

U-96MF1U9, U-96MF1U9E

55.0

(Quiet mode 52.0)

3.3 ft in front at height of 4.9 ft

Frequency at center of octave band (Hz)

60Hz

Standard mode

Quiet mode

4 - 15

– MEMO –

4 - 16

Test Run

Contents

5. TEST RUN

1. Preparing for Test Run .......................................................................................................5-2

2. Test Run Procedure ............................................................................................................5-3

3. Main Outdoor Unit PCB Setting.........................................................................................5-4

4. Auto Address Setting .........................................................................................................5-6

5. Remote Controller Test Run Settings .............................................................................5-12

6. Caution for Pump Down ...................................................................................................5-12

7. Meaning of Alarm Messages ...........................................................................................5-13

5 - 1

1. Preparing for Test Run

Before attempting to start the air conditioner, check the fol-

lowing.

(1) The control wiring is correctly connected and all electrical

connections are tight.

(2) The transportation pads for the indoor fan have been

removed. If not, remove them now.

(3) The power has been connected to the unit for at least 5

hours before starting the compressor. The bottom of the compressor should be warm to the touch and the crankcase heater around the feet of the compressor should be hot to the touch. (Fig. 5-1)

(4) If only 1 outdoor unit is installed, close the service valve

on the balance tubes, and open the service valve on the other 3 tubes (suction, discharge, and liquid tubes). (Fig. 5-2) If 2 or 3 outdoor units are installed, open the service valves on all 4 tubes (suction, discharge, liquid, and balance tubes). (Fig. 5-2)

(5) Request that the customer be present for the trial run.

Explain the contents of the instruction manual, then have the customer actually operate the system.

(6) Be sure to give the instruction manual and warranty cer-

tiﬁ cate to the customer.

(7) When replacing the control PCB, be sure to make all the

same settings on the new PCB as were in use before replacement. The existing EEP ROM is not changed, and is connected to the new control PCB.

Power mains switch

Balance tube

Liquid tube

Discharge tube

Test Run

(Power must be turned ON at least 5 hours before attempting test run)

Fig. 5-1

Suction tube

Fig. 5-2

5 - 2

2. Test Run Procedure

Test Run

Recheck the items to check before the test run.

Unit No. setting switch

(S007)

Unit No. setting switch

(S006)

Unit No. setting switch

(S004 and S005)

(Check the link wiring.)

Unit No. setting switch

(S002 and S003)

Refer to Fig. 5-4

Is it OK to start the compressors?

Turn ON the indoor and

(CN101) on the outdoor main unit PCB.

*3 *3

outdoor unit power.

Short-circuit the mode change pin

At the same time, short-circuit the

automatic address pin (CN100) for 1

second or longer, then release it.

Start indoor and outdoor unit

cooling operation.

LED 1 and 2 blink alternately.

When multiple outdoor main units exist, disconnect the terminals

extended from the shorted plugs (CN003) at all outdoor main unit

PCBs except for 1. Alternatively, move the sockets to the OPEN side.

CASE 3B CASE 3A

Are LEDs 1 and 2 on the

outdoor unit PCB OFF?

Set the No. of outdoor units.

Set the No. of indoor units.

inter-unit control wires connected

to more than 1 refrigerant

Set the system address.

to turn ON the power only for the 1 refrigerant

system where the test run will be

Will automatic address setting

be performed in Heating mode?

Have the outdoor sub

units been connected?

YES

Set the unit address.

*1 The unit with the unit No. set to 1 is

the main unit. All other units are sub units.

Are the

system?

YES

Is it possible

performed?

YES

Is it OK to start the compressors?

Turn ON the indoor and

outdoor unit power.

Short-circuit the automatic

address pin (CN100) on the

outdoor main unit PCB for

1 second or longer,

then release it.

Start indoor and outdoor unit

heating operation.

LED 1 and 2 blink alternately.

YES

CASE 1

Note: It is not necessary to remove

CASE 2

YES

Make necessary corrections.

Turn OFF the indoor and

outdoor unit power.

Check the alarm contents.

Make necessary

corrections

Refer to Table of Self-Diagnostic Functions and Description of Alarm Displays.

Turn OFF the indoor

and outdoor unit power.

Check the alarm

contents.

A minimum of 5 hours must have passed after

the power was turned ON to the outdoor unit.

*3 All indoor units operate in all refrigerant

systems where the power is ON.

Items to Check Before the Test Run

1. Turn the remote power switch on at least 5 hours before the test, in order to energize the crankcase heater.

2. Turn the outdoor service valves (4 locations) to the full-open positions.

Use caution when making the settings. If there are duplicated system addresses, or if the settings for the Nos. of the indoor units are not consistent, an alarm will occur and the system will not start.

These settings are not made on the indoor unit PCB.

the socket that is used to short-circuit the terminal plugs from the outdoor sub unit PCBs.

Turn ON the indoor and outdoor unit power

for that refrigerant system only.

Short-circuit the automatic address

pin (CN100) on the outdoor main unit PCB

for 1 second or longer, then release it.

LED 1 and 2 blink alternately

(about 2 or 3 minutes).

Are LEDs 1 and 2 on the

outdoor unit PCB OFF?

YES

(Do not allow the short-circuited pins to remain short-circuited.)

Refer to the remote

controller test-run

settings.

Check that test run preparation is OK.

Set the wired remote controller for test run.

Does system operate?

YES

Return remote control to normal mode

Check and make corrections according to Table of Self-Diagnostic Functions.

5 - 3

Fig. 5-3

3. Main Outdoor Unit PCB Setting

L Examples of the No. of indoor units settings (S005, S004)

No. of indoor units

1 unit (factory setting)

11 units

21 units

31 units

40 units

Indoor unit setting (S005)

(3P DIP switch, blue)

All OFF

1 ON

2 ON

3 ON

1 & 3 ON

10 20 30

OFF

L Examples of refrigerant circuit (R.C.) address settings (required when link wiring is used) (S003, S002)

System address (S003)

System address No.

System 1 (factory setting)

System 11

System 21

System 30

(2P DIP switch, blue)

10 20

1 ON

2 ON

Both OFF

1 & 2 ON

Indoor unit setting (S004)

(Rotary switch, red)

Set to 1

Set to 0

System address (S002)

(Rotary switch, black)

OFF

Set to 1

Set to 0

Test Run

L Examples of the No. of outdoor units settings (S006)

No. of outdoor units

1 unit (factory setting)

2 units

3 units

Outdoor unit setting (S006)

(3P DIP switch, blue)

1 ON

2 ON

1 & 2 ON

OFF

L Address setting of main outdoor unit (S007)

Unit No. setting

Unit No. 1 (main unit)

Address setting of outdoor unit (S007)

(3P DIP switch, blue)

21ON3

OFF

L Address setting of sub outdoor unit

Unit No. setting

Unit No. 2 (sub unit)

Unit No. 3 (sub unit)

Address setting of outdoor unit (S007)

(3P DIP switch, blue)

2 ON

1 & 2 ON

OFF

The sub unit control PCB contains the same switches as the main unit control PCB for No. of indoor units, No. of outdoor units, and system address. However it is not necessary to set these switches.

5 - 4

3. Main Outdoor Unit PCB Setting

Test Run

CN003

CN101

CN100

Fig. 5-4

5 - 5

S002S003S004S005S007 S006

4. Auto Address Setting

Basic wiring diagram: Example (1)

• If link wiring is not used (The inter-unit control wires are not connected to multiple refrigerant systems.)

Indoor unit addresses can be set without operating the compressors.

No. 1 (main outdoor unit)

settings

System address

(system 1 setting)

(S003)(S002) ON

No. of outdoor units (3 units setting)

OFF

(S006) (S007)

Outdoor Unit

OFF

Unit number

setting (Unit No. 1)

Unit

No. 1

(Main)

No. of indoor units

(10 units setting)

(S004)

(S005)

1ON3

OFF

Leave the socket that is used to short-circuit the terminal plug. (CN003)

Inter-outdoor unit control wiring

Inter-unit control wiring

No. 2 (sub unit)

Unit number setting (Unit No. 2)

(S007)

123

Unit No. 2 (Sub)

OFF

Inter-outdoor unit control wiring

Unit number setting (Unit No. 3)

No. 3 (sub unit)

(S007)

Unit No. 3 (Sub)

Test Run

OFF

Case 1

Indoor Unit

Remote controller

1-1

1-2

1-3

Remote control communication wiring

1-10

Fig. 5-5

(1) Automatic Address Setting from the Outdoor Unit

1. To set the number of outdoor units, on the outdoor main unit control PCB set the No. of outdoor units DIP switch (S006) to

123

On the No. 2 (sub) unit control PCB, set the unit No. switch (S007) to

(3 units), and set the unit No. DIP switch (S007) to (unit No. 1 - main outdoor unit).

OFF

On the No. 3 (sub) unit control PCB, set the unit No. switch (S007) to

On the outdoor main unit control PCB, check that the system address rotary switch (S002) is set to “1” and that the DIP

switch (S003) is set to

To set the number of indoor units that are connected to the outdoor unit to 10 on the outdoor main unit control PCB, set the

No. of indoor units DIP switch (S005) to

Turn ON the power to the indoor and outdoor units.

On the outdoor main unit control PCB, short-circuit the automatic address pin (CN100) for 1 second or longer, then release it.

“0.” (These are the settings at the time of factory shipment.)

OFF

“1.” and set the rotary switch (S004) to “0.”

OFF

123

(unit No. 2).

(unit No. 3).

(Communication for automatic address setting begins.)

To cancel, again short-circuit the automatic address pin (CN100) for 1 second or longer, then release it.

The LED that indicates that automatic address setting is in progress turns OFF and the process is stopped. Be sure to perform automatic address setting again.

(Automatic address setting is completed when LEDs 1 and 2 on the outdoor main unit control PCB turn OFF.)

Operation from the remote controllers is now possible.

7. To perform automatic address setting from the remote controller, perform steps 1 to 5, then use the remote controller and

complete automatic address setting.

Refer to “Automatic Address Setting from the Remote Controller.”

5 - 6

4. Auto Address Setting

Basic wiring diagram: Example (2)

No. 1 (main outdoor unit) settings

System address

(system 1 setting)

(S003)(S002)

OFF

No. of outdoor units (3 units setting)

(S006)

Unit

number

setting

(unit No. 1)

OFF

•

If link wiring is used

No. of indoor units

(13 units setting)

(S004)

(S005)

OFF

(S007)

OFF

No. 2 (sub unit)

Unit number setting (unit No. 2)

Test Run

When multiple outdoor main units exist, remove the socket that is used to short-circuit the terminal plug (CN003) from all outdoor main unit PCBs except for one unit. Alternatively, move the sockets to the “OPEN” side.

No. 3 (sub unit)

123

OFF

Unit number setting (unit No. 3)

(S007)(S007)

OFF

No. 2 Refrigerant circuit

Outdoor unit

system 1

Indoor unit

Remote

controller

System address

(system 2 setting)

No. of outdoor units (2 units setting)

Unit

No. 1

(Main)

Leave the socket that is used to short-circuit the terminal plug. (CN003)

Inter-unit control wiring

No. 1 (main unit) settings

No. of indoor units

(9 units setting)

OFF

(S004)

(S005)

1ON3

Unit number setting (unit No. 1)

(S003)(S002)

(S006)

123

OFF

Unit

Outdoor unit

system 2

No. 1

(Main)

OFF

(S007)

OFF

Move the socket to the “OPEN” side (CN003).

Unit No. 2 (Sub)

Inter-outdoor unit control wiring

Remote control communication wiring

No. 2 (sub unit) settings

Unit number setting (unit No. 2)

(S007)

123

Unit

No. 2

(Sub)

Unit

No. 3

(Sub)

1-131-31-21-1

OFF

Inter-unit control wiring

To other system link wiring

Indoor unit

Remote

controller

2-1 2-2 2-9

Remote control communication wiring

Make settings as appropriate for the cases listed below.

(Refer to the instructions on the following pages.)

· Indoor and outdoor unit power can be turned ON for each system separately.

· Indoor and outdoor unit power cannot be turned ON for each system separately.

Automatic address setting in Heating mode

Automatic address setting in Cooling mode

Fig. 5-6

5 - 7

Inter-outdoor unit control wiring

Case 2

Case 3A

Case 3B

4. Auto Address Setting

Test Run

Case 2

Automatic Address Setting from Outdoor Unit

Automatic Address Setting (no compressor operation)

Indoor and outdoor unit power can be turned ON for each system separately. Indoor unit addresses can be set without operating the compressors.

On the No. 1 (main) unit control PCB, set the unit No. switch (S007) to

On the No. 2 (sub) unit control PCB, set the unit No. switch (S007) to

On the No. 3 (sub) unit control PCB, set the unit No. switch (S007) to

To set the number of outdoor units on the outdoor main unit control PCB, set the No. of outdoor units DIP switch (S006) to

123

On the outdoor main unit control PCB, check that the system address rotary switch (S002) is set to “1” and that the DIP

switch (S003) is set to “0”

OFF

(3 units).

(These are the settings at the time of factory shipment.)

OFF

(unit No. 1).

(unit No. 2).

(unit No. 3).

To set the number of indoor units that are connected to the outdoor unit to 13 on the outdoor main unit control PCB, set the

No. of indoor units DIP switch (S005) to “1”

Turn on power to all indoor and outdoor units in the system.

Short-circuit the automatic address pin at the outdoor main unit (CN100) for 1 second or longer, then release it.

(Communication for automatic address setting begins.)

To cancel, again short-circuit the automatic address pin (CN100) for 1 second or longer, then release it. The LED that indicates automatic address setting is in progress turns OFF and the process is stopped. Be sure to perform automatic address setting again.

(Automatic address setting is completed when LEDs 1 and 2 on the outdoor main unit control PCB turn OFF.)

Next turn the power ON only for the indoor and outdoor units of the next (different) system. Repeat steps 1 - 5 in the same way to complete automatic address settings for all systems.

Operation from the remote controllers is now possible. *

To perform automatic address setting from the remote controller, perform steps 1 - 5, then use the remote controller and complete automatic address setting.

, and set the rotary switch (S004) to “3.”

OFF

Refer to “Automatic Address Setting from Remote Controller.”

5 - 8

4. Auto Address Setting

Case 3A Automatic Address Setting in Heating Mode

Indoor and outdoor unit power cannot be turned ON for each system separately.

In the following, automatic setting of indoor unit addresses is not possible if the compressors are not operating. Therefore perform this process only after completing all refrigerant tubing work.

Automatic Address Setting from Outdoor Unit

Test Run

1. Perform steps 1 - 4 in the same way as for

5. Turn the indoor and outdoor unit power ON at all systems.

6. To perform automatic address setting in Heating mode , on the outdoor main unit control PCB in the refrigerant system where you wish to set the addresses, short-circuit the automatic address pin (CN100) for 1 second or longer, then release

it. (Be sure to perform this process for one system at a time. Automatic address settings cannot be performed for more than one system at the same time.)

(Communication for automatic address setting begins, the compressors turn ON, and automatic address setting in

Heating mode begins.) (All indoor units operate.)

* To cancel, again short-circuit the automatic address pin (CN100) for 1 second or longer, then release it. The

LED that indicates automatic address setting is in progress turns OFF and the process is stopped. Be sure to perform automatic address setting again.

(Automatic address setting is completed when the compressors stop and LEDs 1 and 2 on the main unit control PCB turn

OFF.)

7. At the outdoor main unit in the next (different) system, short-circuit the automatic address pin (CN100) for 1 second or longer, then release it.

(Repeat the same steps to complete automatic address setting for all units.)

8. Operation from the remote controllers is now possible. * To perform automatic address setting from the remote controller, perform steps 1 - 5, then use the remote controller and

complete automatic address setting.

Refer to “Automatic Address Setting from Remote Controller.”

Case 2

5 - 9

4. Auto Address Setting

Test Run

Case 3B

Indoor and outdoor unit power cannot be turned ON for each system separately. In the following, automatic setting of indoor unit addresses is not possible if the compressors are not operating. Therefore perform this process only after completing all refrigerant tubing work. Automatic address setting can be performed during Cooling operation.

Automatic Address Setting from Outdoor Unit

Perform steps 1 – 4 in the same way as for .

Turn the indoor and outdoor unit power ON at all systems.

To perform automatic address setting in , on the outdoor main unit control PCB in the refrigerant system

where you wish to set the addresses, short-circuit the mode change 2P pin (CN101). At the same time, short-circuit the automatic address pin (CN100) for 1 second or longer, then release it. (Be sure to perform this process for one system at a time. Automatic address settings cannot be performed for more than one system at the same time.)

(Communication for automatic address setting begins, the compressors turn ON, and automatic address setting in

Cooling mode begins.)

(All indoor units operate.)

(Automatic address setting is completed when the compressors stop and LEDs 1 and 2 on the outdoor main unit control PCB turn OFF.)

Automatic Address Setting in Cooling Mode

Case 2

Cooling mode

To cancel, again short-circuit the automatic address pin (CN100) for 1 second or longer, then release it.

The LED that indicates automatic address setting is in progress turns OFF and the process is stopped. Be sure to perform automatic address setting again.

At the outdoor main unit in the next (different) system, short-circuit the automatic address pin (CN100) for 1 second or longer,

then release it.

(Repeat the same steps to complete automatic address setting for all units.)

Operation from the remote controllers is now possible.

* Automatic address setting in Cooling mode cannot be done from the remote controller.

Automatic Address Setting* from the Remote Controller

Selecting each refrigerant system individually for automatic address setting

---Automatic address setting for each system: Item code “A1”

Press the remote controller timer time button and button at the same time.

(Press and hold for 4 seconds or longer.)

Next, press either the temperature setting or button.

(Check that the item code is “A1.”)

Use either the or button to set the system No. to perform automatic

address setting.

4. Then press the

(Automatic address setting for one refrigerant system begins.)

(When automatic address setting for one system is completed, the system returns to normal stopped status.) <Approximately 4 – 5 minutes is required.>

button.

(During automatic address setting, “ ” is displayed on the remote controller. This message disappears when automatic address setting is completed.)

Repeat the same steps to perform automatic address setting for each successive system.

5 - 10

Panasonic U-96MF1U9, U-96MF1U9E, U-72MF1U9, U-72MF1U9E User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Precautions for Installation Using New Refrigerant

Contents

1. OUTLINE OF 3WAY VRF SYSTEM

1. Line-up

2. Features of 3WAY VRF SYSTEM

2. DESIGN OF 3WAY VRF SYSTEM

1. Model Selecting and Capacity Calculator

2. System Design

3. Electrical Wiring

4. Installation Instructions

5. HOW TO PROCESS TUBING

6. AIR PURGING

7. Optional Parts

3. Control of 3WAY VRF SYSTEM

4. 3WAY VRF SYSTEM UNIT SPECIFICATIONS

1. Outdoor Unit

5. TEST RUN

1. Preparing for Test Run

2. Test Run Procedure

3. Main Outdoor Unit PCB Setting

4. Auto Address Setting