INSTALLATION INSTRUCTIONS
Air Conditioner
This air conditioner uses the refrigerant R410A.
NOTE External diameter of service port R410A: 5/16" (7.94mm)
Model No.
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Outdoor Units |
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Type |
Outdoor Unit Type |
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Nominal Capacity |
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72 |
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96 |
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120 |
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144 |
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ME2 |
2WAY VRF System |
U-72ME2U9 |
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U-96ME2U9 |
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U-120ME2U9 |
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U-144ME2U9 |
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U-72ME2U94 |
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U-96ME2U94 |
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U-120ME2U94 |
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U-144ME2U94 |
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• To be connecting Indoor Unit |
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Indoor Units |
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Type |
Indoor Unit Type |
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Nominal Capacity |
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7 |
9 |
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12 |
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15 |
18 |
24 |
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36 |
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48 |
54 |
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U2 |
4-Way Cassette |
S-07MU2U6 |
S-09MU2U6 |
S-12MU2U6 |
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S-24MU2U6 |
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S-36MU2U6 |
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36" × 36" |
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Y2 |
4-Way Cassette |
S-07MY2U6 |
S-09MY2U6 |
S-12MY2U6 |
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S-18MY2U6 |
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24" × 24" |
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D1 |
1-Way Cassette |
S-07MD1U6 |
S-09MD1U6 |
S-12MD1U6 |
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F2 |
Concealed Duct |
S-07MF2U6 |
S-09MF2U6 |
S-12MF2U6 |
S-15MF2U6 |
S-18MF2U6 |
S-24MF2U6 |
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S-36MF2U6 |
S-48MF2U6 |
S-54MF2U6 |
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- Medium Static |
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M2 |
Concealed Duct |
S-07MM2U6 |
S-09MM2U6 |
S-12MM2U6 |
S-15MM2U6 |
S-18MM2U6 |
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- Low Static |
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E1 |
Concealed Duct |
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S-36ME1U6 |
S-48ME1U6 |
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- High Static |
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T2 |
Ceiling |
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S-12MT2U6 |
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S-18MT2U6 |
S-24MT2U6 |
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K2 |
Wall Mounted |
S-07MK2U6 |
S-09MK2U6 |
S-12MK2U6 |
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S-18MK2U6 |
S-24MK2U6 |
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P1 |
Floor Standing |
S-07MP1U6 |
S-09MP1U6 |
S-12MP1U6 |
S-15MP1U6 |
S-18MP1U6 |
S-24MP1U6 |
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R1 |
Concealed Floor |
S-07MR1U6 |
S-09MR1U6 |
S-12MR1U6 |
S-15MR1U6 |
S-18MR1U6 |
S-24MR1U6 |
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Standing |
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Read through the Installation Instructions before you proceed with the installation.
In particular, you will need to read under the “IMPORTANT!” section at the top of the page.
CV6231977845 |
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85464369760022 |
ACXF60-18511 |
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00_302411_EN.indd 1 |
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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.
●This air conditioner shall be installed in accordance with National Wiring Regulations.
●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
CAUTION unsafe practice which can result 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.
•This equipment is strongly recommended to be installed with Earth Leakage Circuit Breaker (ELCB) or Residual Current Device (RCD). Otherwise, it may cause electrical shock and fire in case of equipment breakdown or insulation breakdown.
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
CAUTION outlet at least 5 ft. (1.5 m) 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
•Pay particular attention to refrigerant leakages.
•Ventilate the room immediately, 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 toxic gas.
•Keep all tubing runs as short as possible.
•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.
WARNING
•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 refrigerant cycle.
•If the refrigerant comes in contact with a flame, it produces a toxic gas.
•Do not add or replace refrigerant other than specified type. It may cause product damage, burst and injury, etc.
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•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.
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 .
WARNING
•This product must not be modified or disassembled under any circumstances. Modified or disassembled unit may cause fire, electric shock or injury.
•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.
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. Leaked 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 toxic gas.
Others
CAUTION
• Do not sit or step on the unit, you may fall down accidentally.
• Do not touch the air inlet or the sharp aluminum fins of the outdoor unit. You may get injured.
• 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 400 oz (11.3 kg) per 1,000 ft3 (28.3 m3) for R410A refrigerant. For additional guidance and precautions related to refrigerant safety, please refer to the following documents:
International Mechanical Code 2012 (IMC-2012)
(or more recently revised) ASHRAE 15
ASHRAE 34
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Precautions for Installation Using New Refrigerant
1. Care regarding tubing
1-1. Process tubing
•Material: Use seamless phosphorous deoxidized copper tube for refrigeration. Wall thickness shall comply with the applicable legislation. The minimal wall thickness must be in accordance with the table below.
•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
Outer diameter |
Wall thickness |
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1/4" (6.35) |
0.025 (0.635) |
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3/8" (9.52) |
0.030 (0.762) |
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1/2" (12.7) |
0.035 (0.889) |
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5/8" (15.88) |
0.040 (1.016) |
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3/4" (19.05) |
0.042 (1.0668) |
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Material: O
Outer diameter |
Wall thickness |
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7/8" (22.22) |
0.045 (1.143) |
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1-1/8" (28.58) |
0.050 (1.27) |
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1-3/8" (34.92) |
0.055 (1.397) |
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1-5/8" (41.28) |
0.060 (1.524) |
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Unit: in. (mm) |
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.
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New |
R407C tools |
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Item |
compatible |
Remarks |
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tools? |
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with R410A? |
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Manifold gauge |
Yes |
No |
Types of refrigerant, refrigerating machine oil, and |
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pressure gauge are different. |
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Charge hose |
Yes |
No |
To resist higher pressure, material must be changed. |
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Use a conventional vacuum pump if it is equipped with |
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Vacuum pump |
Yes |
Yes |
a check valve. If it has no check valve, purchase and |
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attach a vacuum pump adapter. |
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Leak detectors for CFC and HCFC that react to chlorine |
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Leak detector |
Yes |
No |
do not function because R410A contains no chlorine. |
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Leak detector for HFC134a can be used for R410A. |
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For systems that use R22, apply mineral oil (Suniso |
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Flaring oil |
Yes |
No |
oil) to the flare nuts on the tubing to prevent refrigerant |
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leakage. For machines that use R407C or R410A, apply |
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synthetic oil (ether oil) to the flare nuts. |
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* Using tools for R22 and R407C and new tools for R410A together can cause defects.
Manifold gauge
Vacuum pump
Outlet
Inlet
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3-2. Use R410A exclusive cylinder only. |
Valve |
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Single-outlet valve
(with siphon tube)
Liquid refrigerant should be recharged with the cylinder standing on end as shown.
Liquid
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) |
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R407C refrigerating machine oil |
Synthetic fluid (ether oil) |
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R410A refrigerating machine oil |
Synthetic fluid (ether oil) |
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CONTENTS
Page
IMPORTANT! . . . . . . . . . . . . . . . 2
Please Read Before Starting Check of Density Limit
Precautions for Installation Using New Refrigerant New refrigerant R410A cannot be used for earlier models
1.GENERAL. . . . . . . . . . . . . . . 7
1-1. Tools Required for Installation (not supplied)
1-2. Accessories Supplied
1-3. Type of Copper Tube and Insulation Material 1-4. Additional Materials Required for Installation 1-5. Tubing Length
1-6. Tubing Size
1-7. Straight Equivalent Length of Joints
1-8. Additional Refrigerant Charge
1-9. System Limitations
1-10. Check of Limit Density
1-11. Installing Distribution Joint
1-12. Optional Distribution Joint Kits
1-13. Example of Tubing Size Selection and
Refrigerant Charge Amount
2.SELECTING THE INSTALLATION SITE. . . 17
2-1. Outdoor Unit
2-2. Shield for Horizontal Exhaust Discharge
2-3. Installing the Outdoor Unit in Heavy Snow
Areas
2-4. Precautions When Installing in Heavy Snow
Areas
2-5. Dimensions of Wind Ducting
2-6. Dimensions of Snow Ducting
3.HOW TO INSTALL THE OUTDOOR UNIT. . . 23
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 . . . . . . . . . . 28
4-1. General Precautions on Wiring
4-2. Recommended Wire Length and Wire Diameter for Power Supply System
4-3. Wiring System Diagram
Page
5.HOW TO PROCESS TUBING . . . . . . . 34
5-1. Connecting the Refrigerant Tubing
5-2. Connecting Tubing Between Indoor and Outdoor Units
5-3. Insulating the Refrigerant Tubing
5-4. Taping the Tubes
5-5. Finishing the Installation
6. AIR PURGING. . . . . . . . . . . . . 37
nAir Purging with a Vacuum Pump (for Test Run) Preparation
7.TEST RUN. . . . . . . . . . . . . . . 40
7-1. Preparing for Test Run
7-2. Test Run Procedure
7-3. Main Outdoor Unit PCB Setting
7-4. Function Switches on P.C. Board
7-5. Auto Address Setting
7-6. Setting Test Run Remote Controller
7-7. Caution for Pump Down
7-8. Self-Diagnosis Function Table and Contents of
Alarm Display
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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 keyhole 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.
1-3. 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" (7.94mm).
3.Use insulated copper wire for field wiring. Wire size varies with the total length of wiring.
See the section “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
Table 1 Outdoor Unit
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Q’ty |
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Part name |
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Figure |
U-72ME2U9 |
U-96ME2U9 |
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U-120ME2U9 |
U-144ME2U9 |
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U-72ME2U94 |
U-96ME2U94 |
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U-120ME2U94 |
U-144ME2U94 |
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(6 ton) |
(8 ton) |
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(10 ton) |
(12 ton) |
Connection |
Outer |
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Inner |
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tubing |
diameter |
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diameter |
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ø1-1/8"(ø28.58) |
ø1"(ø25.4) |
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Operating |
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paper |
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Instructions |
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Installation |
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paper |
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Instructions |
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7
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00_302411_EN.indd 7 |
2018/7/4 13:27:16 |
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1-5. Tubing Length
Select the installation location so that the length and size of refrigerant tubing are within the allowable range show in the figure below.
1.Main tubing length (maximum tubing size) LM = LA + LB …
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 – 64 are determined by the connection tubing sizes on the indoor units.
H3 |
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L1 |
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C |
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L2 |
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R410A optional distribution joint |
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LM |
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CZ-P680PJ1U (for outdoor unit) |
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CZ-P1350PJ1U (for outdoor unit) |
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Balance tubing |
B LO |
A LA |
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CZ-P160BK1U (for indoor unit) |
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(ø1/4" (6.35mm)) |
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L3 |
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CZ-P680BK1U (for indoor unit) |
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No.1 distribution joint for outdoor unit |
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LC |
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CZ-P1350BK1U (for indoor unit) |
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No.1 distribution joint (for indoor unit) |
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LD |
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LB |
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H1 |
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4 |
5 |
62 |
63 |
64 |
Explanation of symbols |
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For |
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LF |
extension |
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Distribution joint |
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Max.1.3 ft (40cm) |
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For |
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(CZ: optional parts) |
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extension |
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H2 |
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Max.1.3 ft (40cm) |
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Ball valve (field supply) |
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LH |
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T-joint (field supply) |
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LG |
1 |
2 |
3 |
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Solidly welded shut |
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L4 |
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(pinch weld) |
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NOTE
* Be sure to use special R410A distribution joints (CZ: optional parts) for outdoor unit connections and tubing branches.
Table 1-2 Ranges that Apply to Refrigerant Tubing Lengths and to Differences in Installation Heights
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unit: ft. (m) |
Item |
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Mark |
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Contents |
Length |
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L1 |
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Max. tubing length |
Actual length |
656 (200)*2 |
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Equivalent length |
689 (210)*2 |
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L (L2 – L4) |
Difference between max. length and min. |
164 (50)*4 |
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length from the No.1 distribution joint |
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Allowable tubing |
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LM |
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Max. length of main tubing (at maximum size) |
- *3 |
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length |
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1, |
2~ |
64 |
Max. length of each distribution tube |
164 (50)*6 |
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L1 + |
1 + |
2~ |
63 + A |
Total max. tubing length including length of each distribution |
3280 (1000) |
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+ B + LF + LG + LH |
tube (only liquid tubing) |
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A, B + LO, |
C + LO |
Maximum tubing length from outdoor’s 1st distribution |
33 (10) |
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joint to each outdoor unit |
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H1 |
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When outdoor unit is installed higher than indoor unit |
164 (50) |
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Allowable elevation |
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When outdoor unit is installed lower than indoor unit |
131 (40) |
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difference |
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H2 |
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Max. difference between indoor units |
49 (15)*5 |
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H3 |
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Max. difference between outdoor units |
13 (4) |
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Allowable length of |
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L3 |
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T-joint tubing (field-supply); Max. tubing length between the |
6.6 (2) |
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joint tubing |
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first T-joint and solidly welded-shut end point |
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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. (90m) (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 1-9) on the second following page.)
3:If the longest main tubing length (LM) exceeds 164 ft. (50m), increase the main tube size at the portion before 164 ft. (50m) by 1 rank for the gas tubes. (Use a field supply reducer.)
(For the portion that exceeds 164 ft. (50m), set based on the main tube sizes (LA) listed in the table on the following page.)
4:If the tubing length marked "L" (L2 - L4) exceeds 131 ft. (40m), increase the liquid tube and gas tube by 1 rank.
5:If the total distribution tubing length exceeds 1,640ft. (500m), maximum allowable elevation difference (H2) between the indoor units is calculated by the following formula. Make sure the indoor unit’s actual elevation difference should fall within the figure calculated as follows.
Unit of account (feet): 49 x (2 - total tubing length(ft.) ÷ 1,640) or Unit of account (meter): 15 x (2 - total tubing length(m) ÷ 500)
6:If any of the tubing length exceeds 98ft. (30m), increase the size of the liquid and gas tubes by 1 rank.
8
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00_302411_EN.indd 8 |
2018/7/4 13:27:16 |
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1-6. Tubing Size |
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Table 1-3 Main Tubing Size (LA) |
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Between No.1 distribution joint for outdoor unit and No.1 distribution joint (for indoor unit) |
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Unit: in. (mm) |
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BTU/h |
72,000 |
96,000 |
120,000 |
144,000 |
168,000 |
192,000 |
216,000 |
240,000 |
264,000 |
288,000 |
312,000 |
336,000 |
360,000 |
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(kW) |
(21.1) |
(28.1) |
(35.2) |
(42.2) |
(49.2) |
(56.3) |
(63.3) |
(70.3) |
(77.4) |
(84.4) |
(91.4) |
(98.4) |
(105.5) |
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Total system |
6 |
8 |
10 |
12 |
14 |
16 |
18 |
20 |
22 |
24 |
26 |
28 |
30 |
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tonnage |
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Gas tubing |
ø3/4" |
ø7/8" |
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ø1-1/8" |
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ø1-3/8" |
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ø1-5/8" |
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(ø19.05) |
(ø22.22) |
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(ø28.58) |
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(ø34.92) |
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(ø41.28) |
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Liquid tubing |
ø3/8" |
ø1/2" |
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ø5/8" |
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ø3/4" |
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(ø9.52) |
(ø12.7) |
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(ø15.88) |
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(ø19.05) |
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*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 three ranks higher.
*2: The balance tube (outdoor unit tube) diameter is ø1/4" (6.35mm). *3: Type 1 tubing should be used for the refrigerant tubes.
n 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...) |
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Unit: in. (mm) |
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Below BTU/h (kW) |
24,200 |
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54,600 |
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76,800 |
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102,400 |
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143,300 |
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178,800 |
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238,900 |
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340,000 |
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– |
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Total capacity |
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(7.09) |
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(16.0) |
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(22.5) |
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(30.0) |
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(42.0) |
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(52.4) |
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(70.0) |
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(99.6) |
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after distribution |
Over BTU/h (kW) |
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24,200 |
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54,600 |
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76,800 |
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102,400 |
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143,300 |
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178,800 |
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238,900 |
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340,000 |
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(7.09) |
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(16.0) |
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(22.5) |
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(30.0) |
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(42.0) |
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(52.4) |
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(70.0) |
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(99.6) |
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Gas tubing |
ø1/2" |
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ø5/8" |
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ø3/4" |
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ø7/8" |
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ø1-1/8" |
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ø1-1/8" |
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ø1-1/8" |
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ø1-3/8" |
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ø1-5/8" |
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(ø12.7) |
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(ø15.88) |
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(ø19.05) |
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(ø22.22) |
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(ø28.58) |
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(ø28.58) |
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(ø28.58) |
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(ø34.92) |
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(ø41.28) |
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Tubing size |
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Liquid tubing |
ø3/8" |
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ø3/8" |
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ø3/8" |
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ø3/8" |
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ø1/2" |
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ø1/2" |
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ø5/8" |
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ø3/4" |
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ø3/4" |
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(ø9.52) |
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(ø9.52) |
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(ø9.52) |
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(ø9.52) |
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(ø12.7) |
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(ø12.7) |
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(ø15.88) |
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(ø19.05) |
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(ø19.05) |
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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.
Table 1-5 Outdoor Unit Tubing Connection Size |
( A – |
C) Unit: in. (mm) |
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BTU/h |
72,000 |
96,000 |
120,000 |
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144,000 |
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(kW) |
(21.1) |
(28.1) |
(35.2) |
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(42.2) |
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ø3/4" |
ø7/8" |
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ø1-1/8" |
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Gas tubing |
(ø19.05) |
(ø22.22) |
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(ø28.58) |
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Brazing connection |
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Liquid tubing |
ø3/8" (ø9.52) |
ø3/8" (ø9.52) |
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ø1/2" (ø12.7) |
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Flare connection |
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Balance tubing |
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ø1/4" (ø6.35) |
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Flare connection |
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Table 1-6 Refrigerant Charge Amount at Shipment (for outdoor unit)
BTU/h (kW) |
72,000 (21.1) |
96,000 (28.1) |
120,000 (35.2) |
144,000 (42.2) |
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Initial amount |
oz (g) |
321 (9,100) |
363 (10,300) |
300 (8,500) |
416 (11,800) |
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Table 1-7 Indoor Unit Tubing Connection Size
ex.) type72
Balance tube
Liquid tube |
Gas tube |
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Unit: in. (mm)
Indoor unit type |
7 |
9 |
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12 |
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15 |
18 |
24 |
36 |
48 |
54 |
Gas tubing |
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ø1/2" (ø12.7) |
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ø5/8" (ø15.88) |
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Liquid tubing |
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ø1/4" (ø6.35) |
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ø3/8" (ø9.52) |
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9
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00_302411_EN.indd 9 |
2018/7/4 13:27:17 |
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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 |
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Unit: ft. (m) |
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Gas tubing size (in. (mm)) |
1/2" |
5/8" |
3/4" |
7/8" |
1-1/8" |
1-3/8" |
1-5/8" |
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(12.7) |
(15.88) |
(19.05) |
(22.22) |
(28.58) |
(34.92) |
(41.28) |
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90° elbow |
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1 |
1.1 |
1.4 |
1.6 |
1.9 |
2.5 |
2.8 |
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(0.30) |
(0.35) |
(0.42) |
(0.48) |
(0.57) |
(0.76) |
(0.85) |
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45° elbow |
0.8 |
0.9 |
1 |
1.2 |
1.4 |
1.8 |
2.0 |
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(0.23) |
(0.26) |
(0.32) |
(0.36) |
(0.43) |
(0.55) |
(0.61) |
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U-shape tube bent (R2-3/8" – 4" (60 – 100mm)) |
3 |
3.4 |
4.1 |
4.7 |
5.6 |
7.4 |
8.4 |
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(0.90) |
(1.05) |
(1.26) |
(1.44) |
(1.71) |
(2.26) |
(2.56) |
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Trap bend |
7.5 |
9.2 |
10.5 |
12.5 |
15.4 |
19.2 |
22.3 |
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(2.30) |
(2.80) |
(3.20) |
(3.80) |
(4.70) |
(5.85) |
(6.80) |
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Y-branch distribution joint |
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Equivalent length conversion not needed. |
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Ball valve for service |
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Equivalent length conversion not needed. |
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Table 1-9 Refrigerant tubing (Existing tubing can be used.)
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Tubing size (in. (mm)) |
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* When bending the tubes, use a |
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Material: O |
Material: O |
Material: O |
bending radius that is at least 4 times |
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the outer diameter of the tubes. |
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Outer diameter |
Wall thickness |
Outer diameter |
Wall thickness |
Outer diameter |
Wall thickness |
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In addition, take sufficient care to |
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1/4" (6.35) |
0.025 (0.635) |
5/8" (15.88) |
0.040 (1.016) |
1-1/8" (28.58) |
0.050 (1.27) |
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avoid crushing or damaging the tubes |
|
3/8" (9.52) |
0.030 (0.762) |
3/4" (19.05) |
0.042 (1.0668) |
1-3/8" (34.92) |
0.055 (1.397) |
||
when bending them. |
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1/2" (12.7) |
0.035 (0.889) |
7/8" (22.22) |
0.045 (1.143) |
1-5/8" (41.28) |
0.060 (1.524) |
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1-8. Additional Refrigerant Charge
Additional refrigerant charge amount is calculated from the liquid tubing total length, combination number of outdoor unit and refrigerant amount according to all indoor unit cooling capacity.
Required amount of additional refrigerant charge
= [(Necessary amount of additional refrigerant charge per ft. (m) of each size of liquid tube x its tube length) + (...) + (...)]
+[Necessary amount of additional refrigerant charge per outdoor unit]
+[Necessary amount of additional refrigerant charge for all indoor unit cooling capacity]
*Always charge accurately using a scale for weighing.
Table 1-10-1 Necessary Amount of Additional Refrigerant Charge Per ft. (or per meter), According to Liquid Tubing Size
Liquid tubing size |
inch |
ø1/4" |
ø3/8" |
ø1/2" |
ø5/8" |
ø3/4" |
ø7/8" |
|
|
|
|
|
|
|
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||
(mm) |
(ø6.35) |
(ø9.52) |
(ø12.7) |
(ø15.88) |
(ø19.05) |
(ø22.22) |
||
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Additional amount |
oz/ft. |
0.279 |
0.602 |
1.38 |
1.99 |
2.78 |
3.93 |
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(g/m) |
(26) |
(56) |
(128) |
(185) |
(259) |
(366) |
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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.
Combination number of outdoor unit |
1 |
2 |
3 |
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Additional amount |
oz (g) |
70.5 (2,000) |
141.0 (4,000) |
212 (6,000) |
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Necessary Amount of Additional Refrigerant Charge for All Indoor Unit Cooling Capacity
Charge a refrigerant amount calculated in the following formula according to the total amount of indoor unit cooling capacity.
Additional refrigerant amount when cooling capacity is BTU/h = Cooling capacity (BTU/h) x 1.034 x 0.001 + 10.6 (oz) or Additional refrigerant amount when cooling capacity is kW = Cooling capacity (kW) x 1000 x 0.1 + 300 (g)
10
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00_302411_EN.indd 10 |
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1-9. System Limitations
Table 1-11 System Limitations
Max. No. allowable connected outdoor units |
3 *2 |
|
|
Max. capacity allowable connected outdoor |
360,000 BTU/h |
units |
(30 ton, 105.5 kW) |
Max. connectable indoor units |
64 *1 |
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Max. allowable indoor/outdoor capacity ratio |
50 – 200 % *3 |
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|
*1: In the case of 18 ton (63.3kW) or smaller units, the number is limited by the total capacity of the connected indoor units.
*2: Up to 3 units can be connected if the system has been extended. *3: It is strongly recommended that you choose the unit so the load
can become between 50 and 130%.
Table 1-12 System Limitations of Total Refrigerant Amount
Maximum number of connectable indoor units when connected with minimum capacity
Total system |
Number of |
Total system |
Number of |
tonnage |
indoor units |
tonnage |
indoor units |
|
|
|
|
6 |
20 |
14 |
45 |
8 |
25 |
16 |
50 |
10 |
32 |
18 |
55 |
12 |
39 |
20~30 |
64 |
Combination number of outdoor unit |
1 |
2 |
3 |
|
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|
|
|
|
Upper limit |
oz (g) |
1,763 (50,000) |
2,821 (80,000) |
3,703 (105,000) |
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|
|
Make sure the values calculated using the following formula should not exceed the maximum allowable values (Table 1-12).
Total refrigerant amount = Refrigerant charge amount at shipment (for outdoor unit)
+Necessary amount of additional refrigerant charge per ft. (or per meter) according to liquid tubing size
+Necessary amount of additional refrigerant charge per outdoor unit
+Necessary amount of additional refrigerant charge for all indoor unit cooling capacity
WARNING Always check the gas density 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.
11
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00_302411_EN.indd 11 |
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1-11. Installing Distribution Joint
CAUTION |
Pay special attention to any location, such as a basement, etc., where leaking refrigerant can |
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accumulate, since refrigerant gas is heavier than air. |
||
|
(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).
●When connecting a branch tubing to the indoor unit directly, it is necessary for each branch tubing to install at a positive angle with respect to horizontal in order to prevent accumulation of refrigerant oil in stopped units. (See the below chart.)
Branch tubing system |
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Restricted |
Not restricted |
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When not connecting |
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How to install |
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When connecting branch tubing to indoor unit directly |
branch tubing to indoor |
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unit directly |
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branch tubing |
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Suction tube |
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Suction tube / |
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B |
* In case of common use solenoid valve kit |
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Liquid tube / Discharge tube |
Discharge tube / |
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A |
When connecting to A |
When connecting to B |
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Liquid tube |
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Straight tubing |
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B |
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length over |
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8 in. (200mm) |
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15 90° |
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A |
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D |
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Straight tubing |
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Horizontal |
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or |
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Horizontal |
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Horizontal |
length over |
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0 30° |
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Straight tubing length |
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8 in. (200mm) |
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over 8 in. (200mm) |
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(Branch tubing |
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15 90° |
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angle) |
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Arrow view D |
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15 30° |
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(Branch tubing |
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angle) |
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Upward |
Vertical |
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Vertical |
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Vertical |
Vertical |
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Vertical |
Straight tubing |
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Straight tubing |
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length over |
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Downward |
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length over |
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8 in. (200mm) |
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Vertical |
8 in. (200mm) |
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Vertical |
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Vertical |
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15 90° |
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Vertical |
15 90° |
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Header branch system (Main tubing is horizontal.)
Outdoor
Indoor
6.5 ft. (2m)
(From 1st branch to tip of solidly welded part)
Horizontal line
Indoor |
Horizontal line |
|
Install at a positive angle |
Indoor |
(15~30°) |
|
|
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Solidly welded shut (X) |
●Be sure to solidly weld shut the T-joint end (marked by X in the figure). In addition, pay attention to the insertion depth of each connected tube so that the flow of refrigerant within the T-joint is not impeded.
Be sure to use a commercial available T-joint.
●When using the header joint system, do not make further branches in the tubing.
Install at a positive angle |
● Do not use the header joint system on the outdoor unit |
|
side. |
||
(15~30°) |
12
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00_302411_EN.indd 12 |
2018/7/4 13:27:18 |
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1-12. Optional Distribution Joint Kits
See the installation instructions packaged with the distribution joint kit for the installation procedure.
Table 1-12 |
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* In case the total capacity of indoor |
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Model name |
Cooling capacity after distribution |
Remarks |
||
units connected after distribution |
||||
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|
|
||
1. CZ-P680PJ1U |
232,000 BTU/h (68.0 kW) or less |
For outdoor unit |
||
exceeds the total capacity of the |
||||
2. CZ-P1350PJ1U |
more than 232,000 BTU/h (68.0 kW) |
For outdoor unit |
outdoor units, select the distribution |
|
|
|
|
tube size for the total capacity of the |
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3. CZ-P160BK1U |
76,400 BTU/h (22.4 kW) or less* |
For indoor unit |
||
outdoor units. |
||||
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4. CZ-P680BK1U |
232,000 BTU/h (68.0 kW) or less* |
For indoor unit |
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5. CZ-P1350BK1U |
more than 232,000 BTU/h (68.0 kW)* |
For indoor unit |
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nTubing 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 |
|
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(175) |
|
|
5-5/16 |
|
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(135) |
C |
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C |
|
D E F |
C
Distribution
Joint
Reducing
Joints Insulation
31/64-4 (114)
Liquid tubing
4-21/64
(110) |
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3-13/16 |
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(97) |
G |
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G |
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G |
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Distribution |
H |
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Joint |
||
I |
Insulation
4 HI (72) 2-53/6
Reducing
Joints
Unit: in. (mm)
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 |
|
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|
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) |
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2.CZ-P1350PJ1U
For outdoor unit (Capacity after distribution joint is greater than 232,000 BTU/h (68.0 kW).)
Example: |
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Gas tubing |
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Liquid tubing |
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6-57/64 |
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4-21/64 |
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(175) |
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(110) |
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5-5/16 |
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3-13/16 |
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D |
C |
(135) |
B |
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C D |
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(97) G |
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B |
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4 |
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A |
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A |
(114) |
31/64- |
F |
G |
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G |
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Distribution |
B |
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Distribution |
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Joint |
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H |
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Joint |
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I |
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A |
C |
E |
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Insulation |
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D |
F |
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Reducing |
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Insulation |
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Joints |
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: Outside dimension |
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4 H I (72) 2-53/6
Reducing
Joints
Unit: in. (mm)
* With regard to the diameter of the tube without description in Table 1-14, use a reducer (field supply) to adjust the tube diameter.
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 |
|
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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) |
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13
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00_302411_EN.indd 13 |
2018/7/4 13:27:18 |
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3. CZ-P160BK1U Use: For indoor unit (Capacity after distribution joint is 76,400 BTU/h (22.4 kW) or less.)*
Example: |
4-21/64 |
Gas tubing |
|
|
4-21/64 |
|||
|
(110) |
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|
(110) |
||
|
3-13/16 |
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3-13/16 |
||
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(97) |
C |
|
-2 |
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(97) |
||
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C |
|||
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B |
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|||
A |
B |
(72) |
53/64 |
D |
C |
|||
A |
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|||||||
Insulation |
Distribution B |
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Insulation |
Distribution |
C |
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Joint |
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Joint |
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D |
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C |
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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 |
|
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|
|
|
|
|
in. (mm) |
ø3/4" |
ø5/8" |
ø1/2" |
ø3/8" |
ø1/4" |
|
(ø19.05) |
(ø15.88) |
(ø12.7) |
(ø9.52) |
(ø6.35) |
||
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Liquid tubing
D E |
|
-2 |
|
(72) |
53/64 |
||
|
Unit: in. (mm)
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: |
|
6-57/64 |
Gas tubing |
|
|
(175) |
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|
5-5/16 |
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|
(135) |
|
D C B |
A |
A |
B C D EF |
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Distribution |
A |
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Joint |
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B |
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C |
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D |
Reducing |
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Insulation |
|
E |
Joints |
|
F |
|
) |
|
(114 |
31/64-4 |
|
4-21/64 |
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|
(110) |
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3-13/16 |
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(97) |
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G F |
E |
E |
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||
|
E |
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Distribution |
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Joint |
F |
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G |
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H |
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Insulation |
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Liquid tubing
F GH |
2 |
|
53/64- (72) |
||
|
Reducing
Joints
Unit: in. (mm)
Table 1-16 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 |
|
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|
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) |
||
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5. CZ-P1350BK1U
Example:
A
D C
Insulation
Use: For indoor unit (Capacity after distribution joint is greater than 232,000 BTU/h (68.0 kW).)*
6-57/64 |
|
Gas tubing |
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4-21/64 |
|
Liquid tubing |
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(175) |
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(110) |
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5-5/16 |
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3-13/16 |
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(135) |
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C D |
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F |
(97) |
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F |
|
53/64-2 |
|
B |
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31/64-4 |
|
G |
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||
B |
A |
(114) |
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G |
H |
(72) |
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B |
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Distribution |
G |
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Distribution |
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Joint |
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Joint |
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C |
A |
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H |
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D |
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I |
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J |
||
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||
E |
|
Insulation |
Reducing |
|
F |
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||
Reducing |
|
Joints |
||
G |
|
|||
Joints |
: Outside dimension |
Unit: in. (mm) |
||
H |
||||
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|
* With regard to the diameter of the tube without description in Table 1-17, use a reducer (field supply) to adjust the tube diameter.
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 |
|
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|
|
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) |
||
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In case the total capacity of indoor units connected after distribution exceeds the total capacity of the outdoor units, select the distribution tube size for the total capacity of the outdoor units.
14
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00_302411_EN.indd 14 |
2018/7/4 13:27:18 |
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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.
Unit of account (oz)
Required additional refrigerant charge (oz)
or Unit of account (g)
Required additional refrigerant charge (g)
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)
+ Necessary amount of additional refrigerant charge for all indoor unit cooling capacity
Necessary Amount of Additional Refrigerant Charge Per Outdoor Unit
=+ 366 × (a) + 259 × (b) + 185 × (c) + 128 × (d) + 56 × (e) + 26 × (f)
+ Necessary amount of additional refrigerant charge for all indoor unit cooling capacity
(a) : Liquid tubing |
Total length of ø7/8" (ft.) or (m) |
(d) : |
Liquid tubing |
Total length of ø1/2" (ft.) or (m) |
(b) : Liquid tubing |
Total length of ø3/4" (ft.) or (m) |
(e) : |
Liquid tubing |
Total length of ø3/8" (ft.) or (m) |
(c) : Liquid tubing |
Total length of ø5/8" (ft.) or (m) |
(f) : |
Liquid tubing |
Total length of ø1/4" (ft.) or (m) |
•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.
1. R410A additional charging absolutely must be done through liquid charging. CAUTION 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.
For type 72
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 (4mm)) and turn to the left to
open.
Gas tube
Use a flathead screwdriver and open by turning the part with the screw groove to the right, from “–” to “|”.
For type 96
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 (4mm)) and turn to the left to
open.
Gas tube
Use a flathead screwdriver and open by turning the part with the screw groove to the right, from “–” to “|”.
15
For type 120/144
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 (4mm)) and turn to the left to
open.
Gas tube
Use a flathead screwdriver and open by turning the part with the screw groove to the right, from “–” to “|”.
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Example: |
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l Example of all outdoor units |
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l Example of each tubing length |
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Outdoor unit |
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cooling capacity |
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Main tubing |
Distribution joint tubing |
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Type 72: 72,000 BTU/h |
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(21.1 kW) |
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LA = 131 ft. (40m) |
Outdoor side |
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Type 96: 96,000 BTU/h |
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(28.1 kW) |
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Type 96 |
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Type 72 |
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LB = 16 ft. |
(4.9m) |
A = 7 ft. |
(2.1m) |
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= 98 ft. |
(30m) |
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[Total] 168,000 BTU/h |
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(49.2 kW) |
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LC = 16 ft. |
(4.9m) |
B = 7 ft. |
(2.1m) |
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(4.9m) |
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LC |
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3 |
= 16 ft. |
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LA |
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1 |
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l Example of all indoor unit cooling capacity |
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[Type 48 x 3] 47,800 x 3 = 143,400 BTU/h |
(14.0 x 3 = 42.0 kW) |
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Type 48 |
Type 48 |
Type 48 |
Type 36 [Type 36 x 1] 36,000 x 1 = 36,000 BTU/h |
(10.6 x 1 = 10.6 kW) |
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[Total] |
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179,400 BTU/h |
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(52.6 kW) |
lObtain liquid tubing size from Tables 1-3, 4, 5, 7 and 10-1.
Main tubing
LA = ø5/8 (in.) (Total capacity of indoor unit is 179,400 BTU/h (52.6kW)) LB = ø1/2 (in.) (Total capacity of indoor unit is 131,600 BTU/h (38.6kW)) LC = ø3/8 (in.) (Total capacity of indoor unit is 83,800 BTU/h (24.6kW))
Distribution joint tubing
Outdoor side |
A: ø3/8 (in.) |
B: ø3/8 (in.) (from outdoor unit connection tubing) |
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Indoor side |
1: ø3/8 (in.) |
2: ø3/8 (in.) |
3: ø3/8 (in.) |
4: ø3/8 (in.) (from indoor unit connection tubing) |
lObtain additional charge amount for each tubing size and additional refrigerant charge amount for all indoor unit cooling capacity. Note 1: The charge amounts per 1 ft. are different for each liquid tubing size.
ø5/8 (in.) |
→ LA |
: 131 ft. × 1.99 oz/ft. |
= 261 oz |
(40m × 185 g/m |
= 7,400g) |
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ø1/2 (in.) |
→ LB |
: 16 ft. × 1.38 oz/ft. |
= |
22 oz |
(4.9m × 128 g/m |
= 627g) |
ø3/8 (in.) |
→ LC + A – B + 1 – 4 |
: 225 ft. × 0.602 oz/ft. = |
135 oz |
(68.6m × 56 g/m |
= 3,842g) |
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Total 418 oz |
(Total 11,869g) |
Additional refrigerant charge amount is 418 oz (11,869g).
Note 2: Necessary amount of additional refrigerant charge per outdoor unit is 141oz (4,000g) in combination of 2 units.
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(See the Table 1-10-2.) |
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Note 2) |
Amount of additional charge for outdoor unit (combination number) |
: |
141oz |
(4,000g) |
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Note 3: Necessary amount of additional refrigerant charge for all indoor unit cooling capacity |
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[BTU/h] |
[kW] |
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179,400 BTU/h |
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(52.6 kW) |
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Cooling capacity (BTU/h) x 1.034 x 0.001 + 10.6 oz |
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(Cooling capacity (kW) x1000 x 0.1 + 300g |
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= 179,400 x 1.034 x 0.001 + 10.6 = 196 oz |
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= 52.6 x 1000 x 0.1 + 300 = 5,560 g) |
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(11,869g) |
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Note 1) |
Amount of additional charge per tubing length |
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: |
418 oz |
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Note 2) |
Amount of additional charge for outdoor unit (combination number) |
: |
141 oz |
(4,000g) |
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Note 3) |
Amount of additional charge for all indoor unit cooling capacity |
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196 oz |
(5,560g) |
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Total of additional refrigerant charge amount |
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755 oz |
(21,429g) |
Therefore, the total of additional refrigerant charge amount reaches 755 oz (21,429g).
lObtain 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 refrigerant charge amount (shown in the Table 1-6) at shipment in total cooling capacity of outdoor unit.
Refrigerant charge amount at shipment |
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(total cooling capacity of outdoor unit) : |
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[168,000BTU/h] |
684 oz |
[49.2kW] (19,400g) |
Total of additional refrigerant charge amount |
: |
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755 oz |
(21,429g) |
Grand total |
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1,439 oz |
(40,829g) |
Therefore, overall refrigerant charge amount of the system reaches 1,439 oz (40,829g).
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.
16
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2. SELECTING THE INSTALLATION SITE
2-1. 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.
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Exhaust fan |
Hot air |
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Heat |
Out- |
source |
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door |
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unit |
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Installation Space
Install the outdoor unit where there is enough space for ventilation. Otherwise the unit may not operate properly. The figure 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.
Example: 2 units installation
*For other installation, follow the standards of combination installation.
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Wall height: Less than 1.7ft. (500mm) |
Wall height: |
Over 1 ft.(300mm) |
Unlimited |
* Over 2 in. |
(50mm) |
Over 2-3/8 in. (60mm) |
* Over 2 in. (50mm)
Over 1.7ft. (500mm) |
Wall height: Unlimited
Wall height: Less than 4.9 ft. (1500mm)
CAUTION
NOTE
•Leave space open above the unit.
•Construct louvers or other openings in the wall, if necessary, to ensure adequate ventilation.
•Do not do any wiring or tubing within 1 ft. (300mm) of the front panel, because this space is needed as a servicing space for the compressor.
•Ensure a base height of 4 in. (100mm) 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. (150mm) 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.
*When setting the anchor bolt to "B" or "C" (see page 20), make enough space for installation operation.
(Space between units: Over 0.6 ft. (180mm), Space from wall: Over 0.83 ft. (250mm))
*When installing a snow-proof ducting, make space between the units 7-3/32 in. (180mm) regardless of the positions (A - C) for installation holes.
*Make a walk-in space in front and behind the unit to ensure ease of operation.
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2-2. 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. (2m) between the airdischarge outlet and a nearby obstacle.
2-3. Installing the Outdoor Unit in Heavy Snow
Areas
In locations where wind-blown snow can be a problem, snow proof ducting (field supply) should be fitted to the unit and direct exposure to the wind should be avoided as much as possible.
In regions with heavy snowfall,
CAUTION the outdoor unit should be provided with a solid, raised
platform and snow-proof ducting (field supply).
DO
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.
2-4. Precautions When Installing in Heavy Snow
Areas
a) The platform should be higher than the maximum snow depth.
b)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.
AVOID |
c) The platform foundation must be solid and the unit must be |
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secured with anchor bolts. |
d) When installing on a roof subject to strong wind, countermeasures must be taken to prevent the unit from being overturned.
Fallen snow
Without snow- |
With snow- |
proof ducting |
proof ducting |
(Without platform) |
(High platform) |
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00_302411_EN.indd 18 |
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2-5. Dimensions of Wind Ducting
Reference diagram for air-discharge chamber (field supply) For type 72/96
Note: Can be installed so that the air direction is to the front or rear direction.
Air direction: Front direction
Top view
unit: in. (mm)
Air direction: Rear direction
Top view
30-35/64 |
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(776) |
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29-29/64 |
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39-31/64 |
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(748) |
3/64 (1) |
(1003) |
5/64 (2) |
27-43/64 |
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(703) |
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28-55/64 |
(733) |
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101-3/16 (2570)
30-5/16
(770)
Front view |
Right side view |
30-35/64 |
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(776) |
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39-31/64 |
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29-29/64 |
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(748) |
5/64 (2) |
(1003) |
3/64 (1) |
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28-55/64 |
(733) |
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101-3/16 (2570)
30-5/16
(770)
Front view |
Right side view |
For type 120/144
Note: Can be installed so that the air direction is to the front or rear direction.
Air direction: Front direction
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Top view |
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46-11/16 |
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(1186) |
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45-19/32 |
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39-31/64 |
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(1158) |
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3/64 (1) |
(1003) |
5/64 (2) |
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43-13/16 |
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(1113) |
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28-55/64 (733) |
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101-3/16 (2570)
unit: in. (mm)
Air direction: Rear direction
Top view
46-11/16 |
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(1186) |
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39-31/64 |
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45-19/32 |
5/64 (2) |
(1003) |
3/64 (1) |
(1158) |
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28-55/64 (733) |
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101-3/16 |
(2570) |
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46-29/64 |
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46-29/64 |
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(1180) |
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(1180) |
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Front view |
Right side view |
Front view |
Right side view |
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Reference diagram for air-discharge chamber (field supply) (continued) Combination of units
For various types of combination, refer to Technical Data.
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C : 28-47/64 (730) Installation hole pitch |
-47/64 (730) Installation hole pitch downward tubing direction |
37-61/64 (964) Installation hole pitch forward tubing direction |
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28 |
A : |
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B : |
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unit: in. (mm)
Top view
(Before installing air-discharge chamber)
J |
G |
J |
G |
J |
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H |
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E |
F |
E |
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K |
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K |
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K |
Top view
I |
F |
I |
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39-31/64 |
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L |
L |
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L |
3/64 (1) |
(1003) |
5/64 (2) |
M |
M |
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M |
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28-55/64 |
(733) |
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101-3/16 (2570)
D |
D |
Front view |
Right side view |
According to the installation site, you may choose the setting position in the depth direction of the anchor bolt from “A”, “B” or “C”.
Sample of small size models (3 units):
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D |
E |
F |
G |
H |
I |
J |
K |
L |
M |
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A : |
2-23/64 |
2-1/8 |
95-29/32 |
3-35/64 |
94-31/64 |
3-15/64 |
29-9/64 |
30-35/64 |
29-29/64 |
27-43/64 |
Installation hole pitch |
(60) |
(54) |
(2,436) |
(90) |
(2,400) |
(82) |
(740) |
(776) |
(748) |
(703) |
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B : |
7-3/32 |
6-27/32 |
105-23/64 |
8-17/64 |
103-15/16 |
7-61/64 |
29-9/64 |
30-35/64 |
29-29/64 |
27-43/64 |
Installation hole pitch |
(180) |
(174) |
(2,676) |
(210) |
(2,640) |
(202) |
(740) |
(776) |
(748) |
(703) |
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C : |
7-3/32 |
6-27/32 |
105-23/64 |
8-17/64 |
103-15/16 |
7-61/64 |
29-9/64 |
30-35/64 |
29-29/64 |
27-43/64 |
Installation hole pitch |
(180) |
(174) |
(2,676) |
(210) |
(2,640) |
(202) |
(740) |
(776) |
(748) |
(703) |
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Sample of middle size models (3 units):
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D |
E |
F |
G |
H |
I |
J |
K |
L |
M |
|
|
|
|
|
|
|
|
|
|
|
A : |
2-23/64 |
2-1/8 |
144-21/64 |
3-35/64 |
142-29/32 |
3-15/64 |
45-9/32 |
46-11/16 |
45-19/32 |
43-13/16 |
Installation hole pitch |
(60) |
(54) |
(3,666) |
(90) |
(3,630) |
(82) |
(1,150) |
(1,186) |
(1,158) |
(1,113) |
|
|
|
|
|
|
|
|
|
|
|
B : |
7-3/32 |
6-27/32 |
153-25/32 |
8-17/64 |
152-23/64 |
7-61/64 |
45-9/32 |
46-11/16 |
45-19/32 |
43-13/16 |
Installation hole pitch |
(180) |
(174) |
(3,906) |
(210) |
(3,870) |
(202) |
(1,150) |
(1,186) |
(1,158) |
(1,113) |
|
|
|
|
|
|
|
|
|
|
|
C : |
7-3/32 |
6-27/32 |
153-25/32 |
8-17/64 |
152-23/64 |
7-61/64 |
45-9/32 |
46-11/16 |
45-19/32 |
43-13/16 |
Installation hole pitch |
(180) |
(174) |
(3,906) |
(210) |
(3,870) |
(202) |
(1,150) |
(1,186) |
(1,158) |
(1,113) |
|
|
|
|
|
|
|
|
|
|
|
20
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00_302411_EN.indd 20 |
2018/7/4 13:27:27 |
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