Panasonic U-72ME1U9, U-96ME1U9, U-72ME1U9E, U-96ME1U9E, CZ-P56SVK1U installation

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INSTALLATION INSTRUCTIONS

2WAY VRF System Air Conditioner

This air conditioner uses the refrigerant R410A.

NOTE External diameter of service port R410A: 5/16"

Model No.

Outdoor Units

Type Outdoor Unit Type

72

96

U-72ME1U9 U-96ME1U9

U 2WAY VRF System

U-72ME1U9E* U-96ME1U9E*

* Salt-Air Damage Resistant Specifications.

Indoor Units

 

 

 

 

 

 

 

7

 

9

 

12

 

15

 

18

Type

 

Indoor Unit Type

 

 

 

 

 

D1

 

1-Way Cassette

 

S-07MD1U6

 

S-09MD1U6

 

S-12MD1U6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

U1

 

4-Way Cassette

 

 

 

 

 

S-12MU1U6

 

 

 

S-18MU1U6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y1

 

4-Way Cassette 60 × 60

 

 

 

 

 

S-12MY1U6

 

 

 

S-18MY1U6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

K1

 

Wall Mounted

 

S-07MK1U6

 

S-09MK1U6

 

S-12MK1U6

 

 

 

S-18MK1U6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T1

 

Ceiling

 

 

 

 

 

S-12MT1U6

 

 

 

S-18MT1U6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

F1

 

Low Silhouette Ducted

 

S-07MF1U6

 

S-09MF1U6

 

S-12MF1U6

 

S-15MF1U6

 

S-18MF1U6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

M1

 

Slim Low Static Ducted

 

S-07MM1U6

 

S-09MM1U6

 

S-12MM1U6

 

S-15MM1U6

 

S-18MM1U6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E1

 

High Static Pressure Ducted

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P1

 

Floor Standing

 

S-07MP1U6

 

S-09MP1U6

 

S-12MP1U6

 

S-15MP1U6

 

S-18MP1U6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R1

 

Concealed Floor Standing

 

S-07MR1U6

 

S-09MR1U6

 

S-12MR1U6

 

S-15MR1U6

 

S-18MR1U6

Type

 

Indoor Unit Type

 

 

 

 

 

 

 

19

 

24

 

36

 

48

 

54

D1

 

1-Way Cassette

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

U1

 

4-Way Cassette

 

 

 

S-24MU1U6

 

S-36MU1U6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y1

 

4-Way Cassette 60 × 60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

K1

 

Wall Mounted

 

S-19MS1U6*1

 

S-24MK1U6

 

 

 

 

 

 

T1

 

Ceiling

 

 

 

S-24MT1U6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

F1

 

Low Silhouette Ducted

 

 

 

S-24MF1U6

 

S-36MF1U6

 

S-48MF1U6

 

S-54MF1U6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

M1

 

Slim Low Static Ducted

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E1

 

High Static Pressure Ducted

 

 

 

 

 

S-36ME1U6

 

S-48ME1U6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P1

 

Floor Standing

 

 

 

S-24MP1U6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R1

 

Concealed Floor Standing

 

 

 

S-24MR1U6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

85464369527012

CV6233186894

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

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

This symbol refers to a hazard or

unsafe practice which can result CAUTION in personal injury or product or

property damage.

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 When Wiring

ELECTRICAL SHOCK CAN CAUSE

SEVERE PERSONAL INJURY OR DEATH.

ONLY A QUALIFIED, EXPERIENCED

ELECTRICIAN SHOULD ATTEMPT TO

WIRE THIS SYSTEM.

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 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 outlet at

CAUTION

least 5 feet away from the unit.

 

…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.

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

WARNING

tension inside the 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.

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.

W

Ch

The ins era lim

The er, and lay risk foc Wit buil sys tive tion Mo to r con the sm ced den em occ

2

t

a

n

-

h

nt

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.

 

• Do not clean inside the indoor and

WARNING

 

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.

CAUTION

Others

• 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.

CAUTION

• 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

3

Unit: in. (mm)

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 CAUTION prevent dirt, moisture, or other foreign substances from entering. These substances

can result in system malfunction.

Material

 

 

O

 

 

 

 

 

 

 

 

 

 

 

Copper tube

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)

over 5/128 (1.0)

Unit: in. (mm)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Material

 

 

1/ 2 H, H

 

 

 

 

 

 

 

 

 

 

Copper tube

Outer diameter

7/8 (22.22)

1 (25.4)

1-1/8 (28.58)

1-1/4 (31.75)

1-1/2 (38.1)

1-5/8 (41.28)

Wall thickness

5/128 (1.0)

5/128 (1.0)

5/128 (1.0)

3/64 (1.1)

over 3/64 (1.15)

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. Since refrigerant composition changes and performance decreases when gas leaks, collect the remaining 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 R22and R407C-type refrigerant systems cannot be used.

 

New

R407C tools

 

Item

compatible

Remarks

tool?

 

 

with R410A?

 

 

 

 

 

Manifold gauge

Yes

No

Types of refrigerant, refrigerating machine

 

 

 

oil, and pressure gauge are different.

 

 

 

 

Charge hose

Yes

No

To resist higher pressure, material must be changed.

 

 

 

 

Vacuum pump

Yes

Yes

Use a conventional vacuum pump if it is equipped

 

 

 

with a check valve. If it has no check valve,

 

 

 

purchase and attach a vacuum pump adapter.

 

 

 

 

Leak detector

Yes

No

Leak detectors for CFC and HCFC that

 

 

 

react to chlorine do not function because

 

 

 

R410A contains no chlorine. Leak detector

 

 

 

for HFC134a can be used for R410A.

 

 

 

 

Flaring oil

Yes

No

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

 

 

 

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.

 

 

 

 

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

Manifold gauge

Vacuum pump

Outlet

Inlet

4

3-2. Use R410A exclusive cylinder only.

Valve

 

Single-outlet valve

(with siphon tube)

Liquid refrigerant should be recharged with the cylinder standing on end as shown.

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.

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)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Liquid

5

CONTENTS

 

Page

 

 

Page

IMPORTANT! . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. 2

5.

HOW TO PROCESS TUBING . . . . . . . . . . .

. 28

Please Read Before Starting

 

 

5-1. Connecting the Refrigerant Tubing

 

Check of Density Limit

 

 

5-2. Connecting Tubing Between Indoor and

 

Precautions for Installation Using New Refrigerant

 

 

Outdoor Units

 

New refrigerant R410A cannot be used for earlier models

 

5-3. Insulating the Refrigerant Tubing

 

1. GENERAL

7

 

5-4. Taping the Tubes

 

 

5-5. Finishing the Installation

 

 

 

 

 

 

1-1.

Tools Required for Installation (not supplied)

6.

AIR PURGING

32

1-2.

Accessories Supplied

 

 

 

 

 

1-3.

Type of Copper Tube and Insulation Material

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

1-4.

Additional Materials Required for Installation

 

Preparation

 

1-5.

Tubing Length

 

7.

TEST RUN

35

1-6.

Tubing Size

 

 

 

 

 

1-7.

Straight Equivalent Length of Joints

 

 

7-1. Preparing for Test Run

 

1-8.

Additional Refrigerant Charge

 

 

7-2. Test Run Procedure

 

1-9.

System Limitations

 

 

7-3. Main Outdoor Unit PCB Setting

 

1-10.

Check of Limit Density

 

 

7-4. Auto Address Setting

 

1-11.

Installing Distribution Joint

 

 

7-5. Remote Controller Test Run Settings

 

1-12. Optional Distribution Joint Kits

 

 

7-6. Caution for Pump Down

 

1-13.

Example of Tubing Size Selection and

 

 

7-7. Meaning of Alarm Messages

 

 

Refrigerant Charge Amount

 

 

 

 

2. SELECTING THE INSTALLATION SITE . . . . .

16

 

 

 

2-1.

Outdoor Unit

 

 

 

 

2-2.

Removing Fin Guard for Heat Exchanger

 

 

 

 

2-3.

Shield for Horizontal Exhaust Discharge

 

 

 

 

2-4.

Installing the Outdoor Unit in Heavy Snow

 

 

 

 

Areas

 

 

 

 

2-5.

Precautions When Installing in Heavy Snow

 

 

 

 

Areas

 

 

 

 

2-6.

Dimensions of Wind Ducting

 

 

 

 

2-7.

Dimensions of Snow Ducting

 

 

 

 

3.HOW TO INSTALL THE OUTDOOR UNIT . . . 20

3-1. Transporting

3-2. Installing the Outdoor Unit

3-3. Routing the Tubing

3-4. Prepare the Tubing

3-5. Connect the Tubing

4. ELECTRICAL WIRING . . . . . . . . . . . . . . . . . .

24

4-1.

General Precautions on Wiring

 

4-2.

Recommended Wire Length and Wire

 

 

Diameter for Power Supply System

 

4-3.

Wiring System Diagram

 

6

1. GENERAL

This booklet briefly outlines where and how to install the air conditioning system. Please read over the entire set of instructions for the outdoor unit and make sure all accessory parts listed are with the system before beginning.

1-1. Tools Required for Installation (not supplied)

1.Flathead screwdriver

2.Phillips head screwdriver

3.Knife or wire stripper

4.Tape measure

5.Level gauge

6.Sabre saw or key hole saw

7.Hacksaw

8.Core bits

9.Hammer

10.Drill

11.Tube cutter

12.Tube flaring tool

13.Torque wrench

14.Adjustable wrench

15.Reamer (for deburring)

1-2. Accessories Supplied

See Table 1-1.

Table 1-1 Outdoor Unit

1-3. Type of Copper Tube and Insulation Material

If you wish to purchase these materials separately from a local source, you will need:

1.Deoxidized annealed copper tube for refrigerant tubing.

2.Foamed polyethylene insulation for copper tubes as required to precise length of tubing. Wall thickness of the insulation should be not less than 5/16".

3.Use insulated copper wire for field wiring. Wire size varies with the total length of wiring.

Refer to “4. ELECTRICAL WIRING” for details.

Check local electrical codes and CAUTION regulations before obtaining

wire. Also, check any specified instructions or limitations.

1-4. Additional Materials Required for Installation

1.Refrigeration (armored) tape

2.Insulated staples or clamps for connecting wire (See your local codes.)

3.Putty

4.Refrigeration tubing lubricant

5.Clamps or saddles to secure refrigerant tubing

6.Scale for weighing

 

 

 

Q’ty

Part name

Figure

U-72ME1U9

U-96ME1U9

U-72ME1U9E

U-96ME1U9E

 

 

 

 

(6 ton)

(8 ton)

Outer

Inner

0

1

diameter

diameter

o1-1/8"(o28.58)

o3/4"(o19.05)

 

 

Connection tubing

Inner

 

 

Outer

 

 

diameter

diameter

1

1

o7/8"(o22.22)

o3/4"(o19.05)

 

 

Instruction manual

paper

1

1

7

1-5. 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.

1.Main tubing length LM = LA + LB …262 ft

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

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

4.

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

L5

 

 

 

 

 

 

 

 

H3

 

 

 

 

L1

 

 

 

 

 

 

 

 

 

 

 

C

 

 

 

 

L2

 

 

 

 

 

 

 

 

 

 

 

 

 

LM

 

 

 

 

 

 

B

 

A

 

 

 

 

 

 

Balance tubing

 

 

 

 

 

 

 

 

(ø1/4")

LO

LB

LC

LD

 

 

L3

 

 

 

LA

 

 

 

 

 

 

Explanation of symbols

 

 

 

 

 

 

 

H1

 

 

 

4

5

38

39

40

 

 

 

For

 

 

 

LF

 

 

 

 

 

Distribution joint

 

extension

 

 

 

 

 

Max. 1.3 ft

 

 

 

 

 

 

(CZ : purchased separately)

 

 

 

 

 

 

 

 

For

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

extension

 

 

 

H2

Ball valve (field supply)

 

 

 

LH

 

 

 

 

Max. 1.3 ft

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T-joint (field supply)

 

 

 

 

 

 

 

 

 

 

LG

 

1

2

3

 

 

Solidly welded shut

 

 

 

 

 

 

 

 

 

 

 

 

 

(pinch weld)

 

 

 

 

 

 

 

 

 

 

L4

 

 

 

 

 

 

R410A distribution joint

CZ-P680PJ1U (for outdoor unit) CZ-P1350PJ1U (for outdoor unit) CZ-P160BK1U (for indoor unit) CZ-P680BK1U (for indoor unit) CZ-P1350BK1U (for indoor unit)

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.

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

Item

 

Mark

Contents

Length(ft.)

 

 

 

 

 

 

 

 

 

 

L1

Max. tubing length

Actual length

492

 

 

 

 

 

 

 

 

Equivalent length

574

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L (L2 – L4)

Difference between max. length and min.

131

 

 

length from the No.1 distribution joint

Allowable tubing

 

 

 

 

 

 

 

 

 

 

 

 

LM

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

262*³

length

 

 

 

 

 

 

 

 

 

1,

2~ 40

Max. length of each distribution tube

98

 

 

 

 

 

 

 

 

 

L1 +

1 +

2~ 39 + A

Total max. tubing length including length of each distribution

984

 

+ B + LF + LG + LH

tube (only liquid tubing)

 

 

 

 

 

 

 

 

 

 

 

L5

Distance between outdoor units

32

 

 

 

 

 

 

 

 

 

H1

When outdoor unit is installed higher than indoor unit

164

 

 

 

 

 

 

Allowable elevation

 

 

When outdoor unit is installed lower than indoor unit

131

 

 

 

difference

 

 

H2

Max. difference between indoor units

49

 

 

 

 

 

 

 

 

 

H3

Max. difference between outdoor units

13

 

 

 

 

 

 

Allowable length of

 

 

L3

T-joint tubing (field-supply); Max. tubing length between the

6.6

joint tubing

 

 

first T-joint and solidly welded-shut end point

 

 

 

 

 

 

 

 

 

 

 

L = Length, H = Height

NOTE

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

2:If the longest tubing length (L1) exceeds 295 ft. (equivalent length), increase the sizes of the main tubes (LM) by 1 rank for gas tubes and liquid tubes. (Use a field supply reducer.) (Select the tube size from the table of main tube sizes (Table 1-3) on the following page (LA table), and from the table of refrigerant tubing sizes (Table 1-8) on the second following page.)

3: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 gas tubes. (Use a field supply reducer.)

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

4:If the size of the existing tubing is already larger than the standard tubing size, it is not necessary to further increase the size.

*If the existing tubing is used, and the amount of on-site additional refrigerant charge exceeds the value listed below, then change the size of the tubing to reduce the amount of refrigerant.

Max. additional charge for 1 outdoor unit: 62 lbs Max. additional charge for 2 outdoor units: 111lbs

8

1-6. Tubing Size

Table 1-3 Main Tubing Size (LA)

 

 

 

 

 

 

 

Unit: in. (mm)

BTU/h

72,000

96,000

139,000

168,000

192,000

203,000

240,000

264,000

288,000

(kW)

(21.1)

(28.1)

(40.7)

(49.2)

(56.3)

(59.5)

(70.3)

(77.4)

(84.4)

Total system tonnage

6

8

12

14

16

18

20

22

24

Combined outdoor models

U-72ME1U9(E) U-96ME1U9(E) U-72ME1U9(E) U-72ME1U9(E) U-96ME1U9(E) U-72ME1U9(E) U-96ME1U9(E) U-96ME1U9(E) U-96ME1U9(E)

 

 

U-72ME1U9(E) U-96ME1U9(E)

U-96ME1U9(E) U-72ME1U9(E)

U-72ME1U9(E) U-96ME1U9(E) U-96ME1U9(E)

 

 

 

 

 

 

U-72ME1U9(E) U-72ME1U9(E) U-72ME1U9(E) U-96ME1U9(E)

Gas tubing

o3/4"

o7/8"

 

o1-1/8"

 

 

o1-3/8"

 

(o19.05)

(o22.22)

 

(o28.58)

 

 

(o34.92)

 

 

 

 

 

 

Liquid tubing

 

o3/8"

o1/2"

 

o5/8"

 

 

o3/4"

 

(o9.52)

(o12.7)

 

(o15.88)

 

 

(o19.05)

 

 

 

 

 

 

*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 ø1/4". *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 gas and liquid tubes. (Use field-supply reducers.) (Select from Table 1-3 and Table 1-9.)

*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 gas tubes.

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

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 1-4 Main Tubing Size After Distribution (LB, LC...)

 

 

 

 

Unit: in. (mm)

 

 

 

 

 

 

 

 

 

 

 

Total capacity

Below BTU/h

24,200

54,600

76,800

102,400

143,300

178,800

238,900

334,400

 

 

 

 

 

 

 

 

 

 

after distribution

Over BTU/h

24,200

54,600

76,800

102,400

143,300

178,800

238,900

334,400

 

 

 

 

 

 

 

 

 

 

 

 

 

Gas tubing

ø1/2"

ø5/8"

ø3/4"

ø7/8"

ø1-1/8"

ø1-1/8"

ø1-1/8"

ø1-3/8"

ø1-3/8"

 

(ø12.7)

(ø15.88)

(ø19.05)

(ø22.22)

(ø28.58)

(ø28.58)

(ø28.58)

(ø34.92)

(ø34.92)

Tubing size

 

 

 

 

 

 

 

 

 

 

 

Liquid tubing

ø3/8"

ø3/8"

ø3/8"

ø3/8"

ø1/2"

ø1/2"

ø5/8"

ø3/4"

ø3/4"

 

 

(ø9.52)

(ø9.52)

(ø9.52)

(ø9.52)

(ø12.7)

(ø12.7)

(ø15.88)

(ø19.05)

(ø19.05)

 

 

 

 

 

 

 

 

 

 

 

 

 

Note: In case the total capacity of connected indoor units exceeds the total capacity of the outdoor units, select the main tubing size for the total capacity of the outdoor units. (Especially the main tubing segments of LA, LB and LF.)

Table 1-5 Outdoor Unit Tubing Connection Size

 

( A C)

BTU/h

72,000

 

96,000

 

(kW)

(21.1)

 

(28.1)

 

Gas tubing

ø3/4" *1

 

ø7/8" *2

 

(ø19.05) *1

 

(ø22.22)*2

 

Brazing connection

 

 

 

 

 

 

Liquid tubing

ø3/8" (ø9.52)

 

ø3/8" (ø9.52)

 

 

 

 

Flare connection

 

 

 

 

 

 

 

 

 

 

Balance tubing

ø1/4" (ø6.35)

 

 

 

 

 

 

Flare connection

 

 

 

 

 

 

 

 

 

*1 If the size of tubing (LA) is less than 16.4 feet, it is recommended

Unit: in. (mm)

that the tubing diameter be larger than ø7/8" (ø22.22).

 

 

*2 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).

 

 

Balance tube

 

Liquid tube

Gas tube

 

Table 1-6 Refrigerant Charge Amount at Shipment (for outdoor unit)

DC

U-72ME1U9, U-72ME1U9E

U-96ME1U9, U-96ME1U9E

 

 

(oz)

416

416

Table 1-7 Indoor Unit Tubing Connection Size

 

 

 

 

 

 

Unit: in. (mm)

Indoor unit type

7

9

12

15

18

19

24

36

48

 

54

 

 

 

 

 

 

 

 

 

 

 

 

Gas tubing

 

 

o1/2" (o12.7)

 

 

 

o5/8" (o15.88)

 

 

 

 

 

 

 

 

 

 

 

 

 

Liquid tubing

 

 

o1/4" (o6.35)

 

 

 

o3/8" (o9.52)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note: Use C1220T-1/2H material for tubing over ø3/4" (ø22.22).

9

1-7. Straight Equivalent Length of Joints

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

Table 1-8 Straight Equivalent Length of Joints

 

 

 

 

 

 

 

 

Unit: ft.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Gas tubing size (in. (mm))

 

1/2"

5/8"

 

3/4"

7/8"

1"

1-1/8"

1-3/8"

1-5/8"

 

(12.7)

(15.88)

 

(19.05)

(22.22)

(25.4)

(28.58)

(34.92)

(41.28)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

90° elbow

 

 

 

 

1

1.1

 

1.4

1.6

1.7

1.9

2.5

2.8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

45° elbow

 

0.8

0.9

 

1

1.2

1.3

1.4

1.8

2.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

U-shape tube bent (R2-3/8" – 4" (60 – 100))

 

3

3.4

 

4.1

4.7

5.1

5.6

7.4

8.4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Trap bend

 

7.5

9.2

 

10.5

12.5

14.1

15.4

19.2

22.3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y-branch distribution joint

 

 

 

Equivalent length conversion not needed.

 

 

 

 

 

 

 

 

 

 

Ball valve for service

 

 

 

Equivalent length conversion not needed.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 1-9 Refrigerant tubing (Existing tubing can be used.)

Tubing size (in. (mm))

Material O

Material 1/2H • H

ø1/4" (ø6.35)

t1/32" (t0.8)

ø7/8" (ø22.22)

t5/128" (t1.0)

 

 

 

 

ø3/8" (ø9.52)

t1/32" (t0.8)

ø1" (ø25.4)

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)

ø1-1/4" (ø31.75)

t3/64" (t1.1)

 

 

 

 

ø3/4" (ø19.05)

over t5/128" (t1.0)

ø1-1/2" (ø38.1)

over t3/64" (t1.15)

 

 

 

 

 

 

ø1-5/8" (ø41.28)

over t3/64" (t1.20)

 

 

 

 

*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.

1-8. Additional Refrigerant Charge

Additional refrigerant charge amount is calculated from the liquid tubing total length and a type of outdoor unit as follows.

Table 1-10-1 Amount of Additional Refrigerant Charge Per ft., According to Liquid Tubing Size

Liquid tubing size

Amount of additional

(in. (mm))

refrigerant 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

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.

*If the existing tubing is used, and the amount of on-site additional refrigerant charge exceeds the value listed below, then change the size of the tubing to reduce the amount of refrigerant.

Max. additional charge for 1 outdoor unit

:62 lbs

Max. additional charge for 2 outdoor units

:111 lbs

Table 1-10-2 Necessary Amount of Additional Refrigerant Charge Per Outdoor Unit

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

U-72ME1U9, U-72ME1U9E

U-96ME1U9, U-96ME1U9E

42 oz/unit

42 oz/unit

1-9. System Limitations

Table 1-11 System Limitations

Max. No. allowable connected outdoor units

3 *1

 

 

Max. capacity allowable connected outdoor units

288,000 BTU/h (24 ton, 84.4 kW)

 

 

Max. connectable indoor units

40

 

 

Max. allowable indoor/outdoor capacity ratio

50 – 130 %

 

 

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

10

Always check the gas density WARNING limit for the room in which the

unit is installed.

1-10. Check 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.

Pay special attention to any location,

CAUTION such as a basement, etc., where leaking refrigerant can accumulate, since

refrigerant gas is heavier than air.

1-11. Installing Distribution Joint

(1)Refer to “HOW TO ATTACH DISTRIBUTION JOINT” enclosed with the optional distribution joint kit

(CZ-P680PJ1U, CZ-P1350PJ1U, CZ-P160BK1U, CZ-P680BK1U, CZ-P1350BK1U).

(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 should be at an angle that is greater than horizontal. If the main tubing is vertical, provide a raised starting portion for each branch.

(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 1.3 ft. 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)

 

to

30

15

 

 

 

 

 

 

B

 

 

A

Horizontal

A

B

line

View as seen

 

 

 

 

 

 

from arrow

 

Arrow view

 

 

Types of vertical trap specifications

 

(When using ball valve)

 

 

Main tubing

 

 

 

Ball valve

Indoor unit (more than 2 units)

(If only 1 unit is connected, a ball valve

(BV: purchased

separately)

is also needed on this side.)

Indoor unit (1)

 

 

 

(When not using ball valve)

 

Main tubing

Horizontal

 

 

 

 

 

 

Indoor unit (Each unit is connected

Branch tubing is

 

to tubing that is either

 

level or is directed

directed upward.

 

 

downward.)

 

More than

 

 

 

 

 

 

8 inch

 

 

 

Indoor unit is directed downward

 

 

 

11

1-12. Optional Distribution Joint Kits

See the installation instructions packaged with the distribution joint kit for the installation procedure.

Table 1-12

 

Model name

Cooling capacity after distribution

Remarks

 

 

 

 

 

1.

CZ-P680PJ1U

232,000

BTU/h (68.0 kW) or less

For outdoor unit

 

 

 

 

2.

CZ-P1350PJ1U

460,700 BTU/h (135.0 kW) or less

For outdoor unit

 

 

 

 

 

3.

CZ-P160BK1U

76,400

BTU/h (22.4 kW) or less

For indoor unit

 

 

 

 

 

4.

CZ-P680BK1U

232,000

BTU/h (68.0 kW) or less

For indoor unit

 

 

 

 

5.

CZ-P1350BK1U

460,700 BTU/h (135.0 kW) or less

For indoor unit

 

 

 

 

 

Tubing size (with thermal insulation)

1.CZ-P680PJ1U

For outdoor unit (Capacity after distribution joint is 232,000 BTU/h (68.0 kW) or less.)

Example:

Gas tubing

 

6-59/64

 

5-5/16

 

C

C

D E F

 

C

Distribution

 

Joint

 

Reducing

 

Joints

Insulation

46/13-4

Liquid tubing

 

4-21/64

 

3-13/16

 

G

H I

G

/35-2

G

46

 

Distribution

H

Joint

I

 

Insulation

Reducing

Joints

Unit: in.

Table 1-13 Size of connection point on each part (Shown are inside diameters of tubing)

Size

Part A

Part B

Part C

Part D

Part E

Part F

Part G

Part H

Part I

 

 

 

 

 

 

 

 

 

 

in. (mm)

¯1- 3/8"

ø1-1/4"

ø1-1/8"

ø1"

ø7/8"

ø3/4"

ø5/8"

ø1/2"

ø3/8"

(ø34.92)

(ø31.75)

(ø28.58)

(ø25.4)

(ø22.22)

(ø19.05)

(ø15.88)

(ø12.7)

(ø9.52)

 

 

 

 

 

 

 

 

 

 

 

2. CZ-P1350PJ1U

For outdoor unit (Capacity after distribution joint is greater than 232,000 BTU/h (68.0 kW) and no more than

460,700 BTU/h (135.0 kW).)

Example:

 

Gas tubing

 

 

 

Liquid tubing

 

 

 

 

 

 

 

 

 

 

 

6-57/64

 

 

 

 

4-21/64

 

 

 

5-5/16

 

C D

 

 

3-13/16

 

D

C

B

B

 

 

G

H I

 

 

 

 

 

 

 

46/13-4

 

G

46/35-2

 

 

 

 

(A)

F

 

(A)

 

 

 

G

 

 

 

Distribution

B

 

 

Distribution

 

 

 

Joint

 

 

 

 

 

 

 

 

 

 

Joint

H

 

 

 

 

 

 

 

 

I

 

 

 

(A)

C

E

 

Insulation

 

Reducing

 

 

 

 

 

Joints

 

 

 

D

F

 

 

 

 

 

 

 

 

 

 

 

Unit: in.

Insulation

 

 

Reducing

 

 

 

 

 

Joints

(

): Outside dimension

 

 

Table 1-14 Size of connection point on each part (Shown are inside diameters of tubing)

Size

Part A

Part B

Part C

Part D

Part E

Part F

Part G

Part H

Part I

 

 

 

 

 

 

 

 

 

 

in. (mm)

ø1-3/8"

ø1-1/4"

ø1-1/8"

ø1"

ø7/8"

ø3/4"

ø5/8"

ø1/2"

ø3/8"

(ø34.92)

(ø31.75)

(ø28.58)

(ø25.4)

(ø22.22)

(ø19.05)

(ø15.88)

(ø12.7)

(ø9.52)

 

 

 

 

 

 

 

 

 

 

 

12

Panasonic U-72ME1U9, U-96ME1U9, U-72ME1U9E, U-96ME1U9E, CZ-P56SVK1U installation

3. CZ-P160BK1U

Use: For indoor unit (Capacity after distribution joint is 76,400 BTU/h (22.4 kW) or less.)

Example:

A

Insulation

 

Gas tubing

4-21/64

3-13/16

 

C

B

B

A

Distribution

B

Joint

 

 

C

46/35-2

 

Liquid tubing

 

4-21/64

 

3-13/16

D

C

C

Insulation

Distribution C

 

Joint

D

E

Table 1-15 Size of connection point on each part (Shown are inside diameters of tubing)

Size

Part A

Part B

Part C

Part D

Part E

 

 

 

 

 

 

in. (mm)

ø3/4"

ø5/8"

ø1/2"

ø3/8"

ø1/4"

(ø19.05)

(ø15.88)

(ø12.7)

(ø9.52)

(ø6.35)

 

 

 

 

 

 

 

D E

-2

35

 

 

6/

 

4

Unit: in.

4.CZ-P680BK1U

Use: For indoor unit (Capacity after distribution joint is greater than 76,400 BTU/h (22.4 kW) and no more than 232,000 BTU/h (68.0 kW).)

Example:

Gas tubing

 

 

Liquid tubing

 

 

6-57/64

 

 

 

4-21/64

 

 

5-5/16

 

 

 

3-13/16

 

D C B

A

B C D EF

-4

 

E

E

A

 

13

G F

 

Distribution

A

 

46/

Distribution

E

 

 

 

 

 

 

 

 

 

 

Joint

 

 

 

Joint

 

 

 

B

 

 

 

F

 

 

 

 

 

G

 

 

C

 

 

 

 

 

 

 

 

H

 

 

D

Reducing

 

 

 

 

 

Insulation

 

 

 

 

 

 

 

 

E

Joints

 

 

 

Insulation

 

 

 

 

 

 

 

 

 

F

 

 

 

 

 

 

 

 

 

 

 

Table 1-16 Size of connection point on each part (Shown are inside diameters of tubing)

F GH

Reducing

Joints

Unit: in.

46/35-2

Size

Part A

Part B

Part C

Part D

Part E

Part F

Part G

Part H

 

 

 

 

 

 

 

 

 

in. (mm)

ø1-1/8"

ø1"

ø7/8"

ø3/4"

ø5/8"

ø1/2"

ø3/8"

ø1/4"

(ø28.58)

(ø25.4)

(ø22.22)

(ø19.05)

(ø15.88)

(ø12.7)

(ø9.52)

(ø6.35)

 

 

 

 

 

 

 

 

 

 

5.CZ-P1350BK1U

Use: For indoor unit (Capacity after distribution joint is greater than 232,000 BTU/h (68.0 kW) and no more than 460,700 BTU/h (135.0 kW).)

Example:

Gas tubing

 

6-57/64

 

(A)

5-5/16

 

 

 

 

B

B

D C

 

 

Distribution

B

 

Joint

 

 

C

(A)

 

D

 

 

E

 

 

F

 

Insulation

G

 

 

H

 

C D

(A)

46/13-4

Liquid tubing

4-21/64

3-13/16

F

G G

G

Distribution

Joint

F

H

46/35-2

 

 

H

 

 

 

I

 

 

 

J

 

 

 

Insulation

 

 

 

Reducing

 

Reducing

 

Joints

Unit: in.

Joints

(

): Outside dimension

 

 

 

Table 1-17 Size of connection point on each part (Shown are inside diameters of tubing)

Size

Part A

Part B

Part C

Part D

Part E

Part F

Part G

Part H

Part I

Part J

 

 

 

 

 

 

 

 

 

 

 

in. (mm)

ø1-3/8"

ø1-1/4"

ø1-1/8"

ø1"

ø7/8"

ø3/4"

ø5/8"

ø1/2"

ø3/8"

ø1/4"

(ø34.92)

(ø31.75)

(ø28.58)

(ø25.4)

(ø22.22)

(ø19.05)

(ø15.88)

(ø12.7)

(ø9.52)

(ø6.35)

 

 

 

 

 

 

 

 

 

 

 

 

13

1-13. Example of Tubing Size Selection and Refrigerant Charge Amount

Additional refrigerant charging

Based on the values in Tables 1-3, 4, 5, 7, 10-1 and 10-2, use the liquid tubing size and length, and calculate the amount of additional refrigerant charge using the formula below.

Required additional

refrigerant charge (oz) = Necessary Amount of Additional Refrigerant Charge Per Outdoor Unit

+ 3.93 × (a) + 2.78 × (b) + 1.99 × (c) + 1.38 × (d) + 0.602 × (e) + 0.279 × (f)

(a) : Liquid tubing

Total length of ø7/8" (ft.)

(d) : Liquid tubing

Total length of ø1/2" (ft.)

(b) : Liquid tubing

Total length of ø3/4" (ft.)

(e) : Liquid tubing

Total length of ø3/8" (ft.)

(c) : Liquid tubing

Total length of ø5/8" (ft.)

( f ) : Liquid tubing

Total length of ø1/4" (ft.)

Charging procedure

Be sure to charge with R410A refrigerant in liquid form.

1.After performing a vacuum, charge with refrigerant from the liquid tubing side. At this time, all valves must be in the “fully closed” position.

2.If it was not possible to charge the designated amount, operate the system in Cooling mode while charging with refrigerant from the gas tubing side. (This is performed at the time of the test run. For this, all valves must be in the “fully open” position. However if only one outdoor unit is installed, a balance tube is not used. Therefore, leave the valves fully closed.)

Charge with R410A refrigerant in liquid form.

With R410A refrigerant, charge while adjusting the amount being fed a little at a time in order to prevent liquid refrigerant from backing up.

After charging is completed, turn all valves to the “fully open” position.

Replace the tubing covers as they were before.

CAUTION

Example:

Outdoor unit

1.R410A additional charging absolutely must be done through liquid charging.

2.The R410A refrigerant cylinder has a gray base color, and the top part is pink.

3.The R410A refrigerant cylinder includes a siphon tube. Check that the siphon tube is present. (This is indicated on the label at the top of the cylinder.)

4.Due to differences in the refrigerant, pressure, and refrigerant oil involved in installation, it is not possible in some cases to use the same tools for R22 and for R410A.

Balance tube

Use a flathead screwdriver and open by turning the part with the screw groove to the right,

from “–” to “|”.

Liquid tube

Use a hex wrench (width 5/32 inch) and turn to the left to open.

96 type 96 type

B A

LA

Example of each tubing length

Main tubing

LA = 131 ft.

LB = 16 ft.

LC = 16 ft.

LB

LC

 

 

1

2

3

4

48 type

48 type

48 type

36 type

Distribution joint tubing

 

Outdoor side

 

Indoor side

 

A = 7 ft.

 

1 = 98 ft.

 

B = 7 ft.

 

2 = 16 ft.

 

 

 

3 = 16 ft.

 

 

 

4 = 65 ft.

Gas tube

Use a flathead screwdriver and open by turning the part with the screw groove to the right,

from “–” to “|”.

14

Obtain liquid tubing size from Tables 1-3, 4, 5, 7 and 10-1.

Main tubing

LA = ø5/8 (ft.) (Total capacity of indoor unit is 179,400 BTU/h) LB = ø1/2 (ft.) (Total capacity of indoor unit is 131,600 BTU/h) LC = ø3/8 (ft.) (Total capacity of indoor unit is 83,800 BTU/h)

Distribution joint tubing

The longest tubing length in this example (LA = 131 ft.)

Outdoor side

A: ø3/8 (ft.)

B: ø3/8 (ft.)

(from outdoor unit connection tubing)

Indoor side

1: ø3/8 (ft.)

2: ø3/8 (ft.)

3: ø3/8 (ft.)

4: ø3/8 (ft.) (from indoor unit connection tubing)

Obtain additional charge amount for each tubing size.

Note 1: The charge amounts per 1 ft. are different for each liquid tubing size.

ø5/8 (ft.) → LA

: 131 ft. × 1.99 oz/ft.

=

261 oz

ø1/2 (ft.) → LB

: 16 ft. × 1.38 oz/ft.

=

22 oz

ø3/8 (ft.) → LC +

A – B + 1 – 4 : 225 ft. × 0.602 oz/ft. = 135 oz

 

 

 

Total 418 oz

Additional refrigerant charge amount is 418 oz.

 

 

Note 2: Necessary amount of additional refrigerant charge per outdoor unit (U-96ME1U9) is 42 oz. (See the Table 1-10-2.)

Note 1)

Amount of additional charge per tubing length

: 418 oz

Note 2)

Amount of additional charge for outdoor unit

:

84 oz (42+42)

 

 

 

 

Total of additional refrigerant charge amount

:

502 oz

Therefore, the total of additional refrigerant charge amount reaches 502 oz.

Obtain overall refrigerant charge amount.

Overall refrigerant charge amount of the system indicates the calculated value shown above the additional charge amount in addition to the total of the refrigerant charge amount (shown in the Table 1-6) at the shipment of each outdoor unit.

Refrigerant charge amount at shipment:

 

 

U-96ME1U9

:

416 oz

U-96ME1U9

:

416 oz

Additional charge amount

:

502 oz

 

 

Grand total

: 1334 oz

Therefore, overall refrigerant charge amount of the system reaches 1334 oz.

Remark:

Be sure to include the values in Table 1-10-2 Necessary Amount of Additional Refrigerant Charge Per Outdoor Unit.

CAUTION

Be sure to check the limit density for the

 

 

room in which the indoor unit is installed.

 

15

2. SELECTING THE INSTALLATION SITE

2-1. Outdoor Unit

AVOID:

heat sources, exhaust fans, etc.

damp, humid or uneven locations

indoors (no-ventilation location)

Exhaust fan

Hot air

Heat Out- source door

unit

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. 2-2 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 nec-

essary, to ensure adequate

ventilation.

NOTE

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" 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" 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.

Fig. 2-1

Example of installation of 2 units (When wall height is below 6 ft.)

* More than 4 in.

* More than 4 in.

More than

 

2 in.

More than

 

1.7 ft.

* 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.

Fig. 2-2

 

113 (Ceiling panel dimensions)

 

 

 

35

4

35

4

35

 

 

(Ceiling panel dimensions) (Ceiling panel dimensions) (Ceiling panel dimensions)

 

 

 

 

 

 

35(Ceiling panel dimensions)

36-1/4 (Installation hole pitch)

37-1/2 (Maximum dimensions)

31-1/8

7-7/8

31-1/8

7-7/8

31-1/8

 

 

(Installation hole pitch)

 

(Installation hole pitch)

 

(Installation hole pitch)

 

 

 

109-1/16 (Installation hole pitch)

 

 

 

 

 

Top view

 

Unit: in.

 

Fig. 2-3

16

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