Panasonic U-72ME2U9, U-96ME2U9, U-120ME2U9, U-144ME2U9, U-72ME2U94 installation

...

INSTALLATION INSTRUCTIONS

Air Conditioner

This air conditioner uses the refrigerant R410A.

NOTE

External diameter of service port R410A: 5/16" (7.94mm)

Model No.

Outdoor Units

Type Outdoor Unit Type Nominal Capacity

72 96 120 144

ME2 2WAY VRF System

U-72ME2U9 U-96ME2U9 U-120ME2U9 U-144ME2U9

U-72ME2U94 U-96ME2U94 U-120ME2U94 U-144ME2U94

• To be connecting Indoor Unit

Indoor Units

Type Indoor Unit Type

4-Way Cassette

36" × 36"

4-Way Cassette

24" × 24"

D1 1-Way Cassette

Concealed Duct

- Medium Static

Concealed Duct

- Low Static

Concealed Duct

- High Static

7 9 12 15 18 24 36 48 54

S-07MU2U6 S-09MU2U6 S-12MU2U6 S-24MU2U6 S-36MU2U6

S-07MY2U6 S-09MY2U6 S-12MY2U6 S-18MY2U6

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

S-07MF2U6 S-09MF2U6 S-12MF2U6 S-15MF2U6 S-18MF2U6 S-24MF2U6 S-36MF2U6 S-48MF2U6 S-54MF2U6

S-07MM2U6 S-09MM2U6 S-12MM2U6 S-15MM2U6 S-18MM2U6

Nominal Capacity

S-36ME1U6 S-48ME1U6

T2 Ceiling

K2 Wall Mounted

P1 Floor Standing

Concealed Floor

Standing

S-07MK2U6 S-09MK2U6 S-12MK2U6 S-18MK2U6 S-24MK2U6

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

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

S-12MT2U6 S-18MT2U6 S-24MT2U6

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 85464369760022

ACXF60-18511

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IMPORTANT!

WARNING

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

CAUTION

If Necessary, Get Help

These instructions are all you need for most installation

sites and maintenance conditions. If you require help for a special problem, contact our sales/service outlet or your

certiﬁed dealer for additional instructions.

In Case of Improper Installation

The manufacturer shall in no way be responsible for improper installation or maintenance service, including

failure to follow the instructions in this document.

SPECIAL PRECAUTIONS

• 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 over-

heating at connection points and a possible re 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 re in case of equipment breakdown or

insulation breakdown.

WARNING

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

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

This symbol refers to a hazard or

unsafe practice which can result in personal injury or product or property damage.

When Wiring

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

…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 bafe.

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

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

outlet at least 5 ft. (1.5 m) away from the unit.

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 are 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 ame,

it produces a toxic gas.

• Do not add or replace refrigerant other than specied type. It may cause product damage, burst and injury, etc.

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• Do not leak refrigerant while piping work for an

WARNING

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 nish, remembering to check that no metal scraps or bits of wiring have been

left inside the unit .

WARNING

• This product must not be modied or disassembled under any circumstances. Modied or disassembled unit may cause re, 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 re or heat, can

produce dangerously toxic gas.

• Conrm 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 oor 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 dene safeguards related to the use of refrigerants, all of which dene a Refrigerant Concentration Level (RCL) of 400 oz

(11.3 kg) per 1,000 ft

(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

CAUTION

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.

Outer diameter Wall thickness Outer diameter Wall thickness

CAUTION

Material: O Material: O

1/4" (6.35) 0.025 (0.635) 7/8" (22.22) 0.045 (1.143)

3/8" (9.52) 0.030 (0.762) 1-1/8" (28.58) 0.050 (1.27)

1/2" (12.7) 0.035 (0.889) 1-3/8" (34.92) 0.055 (1.397)

5/8" (15.88) 0.040 (1.016) 1-5/8" (41.28) 0.060 (1.524)

3/4" (19.05) 0.042 (1.0668) 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.

Use sufficient care in handling the tubing. Seal the tubing ends with caps or tape to prevent dirt, moisture, or other foreign substances from entering. These substances can result in system malfunction.

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 R22- and R407C-type refrigerant systems cannot be used.

R407C tools

Item

Manifold gauge Yes No

Charge hose Yes No To resist higher pressure, material must be changed.

Vacuum pump Yes Yes

Leak detector Yes No

Flaring oil Yes No

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

New

tools?

compatible

with R410A?

Remarks

Types of refrigerant, refrigerating machine oil, and

pressure gauge are different.

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 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.

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.

Manifold gauge

Vacuum pump

Outlet Inlet

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3-2. Use R410A exclusive cylinder only.

New refrigerant R410A cannot be used for earlier models

1. Compressor specifications are different.

If recharging a R22 or R407C compressor with R410A, durability will significantly decrease since

some of the materials used for compressor parts are different.

Valve

Single-outlet valve

(with siphon tube) Liquid refrigerant should be recharged

with the cylinder standing on end as shown.

Liquid

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)

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CONTENTS

Page 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

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

Air 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

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

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CAUTION

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

Part name Figure

Connection

tubing

Operating Instructions

Installation Instructions

Outer

diameter ø1-1/8"(ø28.58)

Inner diameter

ø1"(ø25.4)

paper

Q’ty

U-72ME2U9

U-72ME2U94

(6 ton)

U-96ME2U9

U-96ME2U94

(8 ton)

U-120ME2U9

U-120ME2U94

(10 ton)

0 0 1 1

1 1 1 1

U-144ME2U9

U-144ME2U94

(12 ton)

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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.

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.

Sizes of indoor unit connection tubing

1 – 64 are determined by the connection tubing sizes on the indoor units.

Balance tubing

(ø1/4" (6.35mm))

No.1 distribution joint for outdoor unit No.1 distribution joint (for indoor unit)

Explanation of symbols

Distribution joint (CZ: optional parts)

Ball valve (field supply)

T-joint (field supply)

Solidly welded shut (pinch weld)

Max.1.3 ft (40cm)

For extension

R410A optional 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

* 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

Item Mark Contents Length

Actual length

Equivalent length

Allowable tubing

length

Allowable elevation

difference

Allowable length of joint tubing

L1 Max. tubing length

L (L2 – L4)

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

LM Max. length of main tubing (at maximum size)

1, 2~ 64 Max. length of each distribution tube

L1 + 1 + 2~ 63 + A

+ B + LF + LG + LH

A, B + LO, C + LO

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

Maximum tubing length from outdoor’s 1st distribution

joint to each outdoor unit

When outdoor unit is installed higher than indoor unit

When outdoor unit is installed lower than indoor unit

H2 Max. difference between indoor units

H3 Max. difference between outdoor units

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

first T-joint and solidly welded-shut end point

unit: ft. (m)

656 (200)*

689 (210)*

164 (50)*

3280 (1000)

33 (10)

164 (50)

131 (40)

49 (15)*

13 (4)

6.6 (2)

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.

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1-6. Tubing Size

Table 1-3 Main Tubing Size (LA)

Between No.1 distribution joint for outdoor unit and No.1 distribution joint (for indoor unit)

BTU/h

(kW)

Total system tonnage

Gas tubing

Liquid tubing

72,000

(21.1)

ø3/4"

(ø19.05)

96,000

(28.1)

6 8 10 12 14 16 18 20 22 24 26 28 30

ø7/8"

(ø22.22)

ø3/8"

(ø9.52)

120,000

(35.2)

(ø12.7)

ø1/2"

144,000

(42.2)

168,000

(49.2)

ø1-1/8"

(ø28.58)

192,000

(56.3)

ø5/8"

(ø15.88)

216,000

(63.3)

240,000

(70.3)

264,000

(77.4)

288,000

(84.4)

ø1-3/8"

(ø34.92)

(ø19.05)

312,000

(91.4)

ø3/4"

*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.

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...)

Total capacity

after distribution

Tubing size

Below BTU/h (kW)

Over BTU/h (kW) –

Gas tubing

Liquid tubing

24,200

(7.09)

ø1/2"

(ø12.7)

ø3/8"

(ø9.52)

54,600

(16.0)

24,200

(7.09)

ø5/8"

(ø15.88)

ø3/8"

(ø9.52)

76,800

(22.5)

54,600

(16.0)

ø3/4"

(ø19.05)

ø3/8"

(ø9.52)

102,400

(30.0)

76,800

(22.5)

ø7/8"

(ø22.22)

ø3/8"

(ø9.52)

143,300

(42.0)

102,400

(30.0)

ø1-1/8"

(ø28.58)

ø1/2"

(ø12.7)

178,800

(52.4)

143,300

(42.0)

ø1-1/8"

(ø28.58)

ø1/2"

(ø12.7)

238,900

(70.0)

178,800

(52.4)

ø1-1/8"

(ø28.58)

ø5/8"

(ø15.88)

340,000

(99.6)

238,900

(70.0)

ø1-3/8"

(ø34.92)

ø3/4"

(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.

Unit: in. (mm)

336,000

(98.4)

Unit: in. (mm)

–

340,000

(99.6)

ø1-5/8"

(ø41.28)

ø3/4"

(ø19.05)

360,000

(105.5)

ø1-5/8"

(ø41.28)

Table 1-5 Outdoor Unit Tubing Connection Size (

BTU/h

(kW)

Gas tubing

Liquid tubing

Balance tubing

72,000

(21.1)

ø3/4"

(ø19.05)

ø3/8" (ø9.52) ø3/8" (ø9.52) ø1/2" (ø12.7)

96,000

(28.1)

ø7/8"

(ø22.22)

Brazing connection

Flare connection

ø1/4" (ø6.35)

Flare connection

120,000

(35.2)

–

ø1-1/8"

(ø28.58)

)

Unit: in. (mm)

144,000

(42.2)

ex.) type72

Balance tube

Liquid tube

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)

Initial amount

Table 1-7 Indoor Unit Tubing Connection Size

oz (g) 321 (9,100) 363 (10,300) 300 (8,500) 416 (11,800)

Unit: in. (mm)

Indoor unit type 7 9 12 15 18 24 36 48 54

Gas tubing ø1/2" (ø12.7) ø5/8" (ø15.88)

Liquid tubing ø1/4" (ø6.35) ø3/8" (ø9.52)

Gas tube

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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

Gas tubing size (in. (mm))

90° elbow

45° elbow

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

Trap bend

Y-branch distribution joint

Ball valve for service Equivalent length conversion not needed.

1/2"

(12.7)

(0.30)

0.8

(0.23)

(0.90)

7.5

(2.30)

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

Tubing size (in. (mm))

Material: O Material: O Material: O

Outer diameter Wall thickness Outer diameter Wall thickness Outer diameter Wall thickness

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)

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)

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)

5/8"

(15.88)

1.1

(0.35)

0.9

(0.26)1(0.32)

3.4

(1.05)

9.2

(2.80)

Equivalent length conversion not needed.

3/4"

(19.05)

1.4

(0.42)

4.1

(1.26)

10.5

(3.20)

7/8"

(22.22)

1.6

(0.48)

1.2

(0.36)

4.7

(1.44)

12.5

(3.80)

1-1/8"

(28.58)

1.9

(0.57)

1.4

(0.43)

5.6

(1.71)

15.4

(4.70)

* 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.

1-3/8"

(34.92)

2.5

(0.76)

1.8

(0.55)

7.4

(2.26)

19.2

(5.85)

Unit: ft. (m)

1-5/8"

(41.28)

2.8

(0.85)

2.0

(0.61)

8.4

(2.56)

22.3

(6.80)

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

Additional amount

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

Additional amount oz (g) 70.5 (2,000) 141.0 (4,000) 212 (6,000)

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.

inch ø1/4" ø3/8" ø1/2" ø5/8" ø3/4" ø7/8"

(mm) (ø6.35) (ø9.52) (ø12.7) (ø15.88) (ø19.05) (ø22.22)

oz/ft. 0.279 0.602 1.38 1.99 2.78 3.93

(g/m) (26) (56) (128) (185) (259) (366)

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)

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1-9. System Limitations

CAUTION

Table 1-11 System Limitations

Max. No. allowable connected outdoor units 3 Max. capacity allowable connected outdoor

units

360,000 BTU/h

(30 ton, 105.5 kW)

Max. connectable indoor units 64

Max. allowable indoor/outdoor capacity ratio 50 – 200 %

*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

Combination number of outdoor unit 1 2 3

Upper limit oz (

) 1,763 (50,000) 2,821 (80,000) 3,703 (105,000)

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

Maximum number of connectable indoor units when connected with minimum capacity

Total system

tonnage

Number of

indoor units

Total system

tonnage

Number of

indoor units

6 20 14 45

8 25 16 50 10 32 18 55 12 39 20~30 64

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.

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1-11. Installing Distribution Joint

CAUTION

15〜90°

CAUTION

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

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

How to install

branch tubing

Horizontal

* In case of common use solenoid valve kit

When connecting to A When connecting to B

Straight tubing

length over 8 in. (200mm)

Arrow view D

When connecting branch tubing to indoor unit directly

Suction tube

15〜90°

Not restricted

Straight tubing

length over 8 in. (200mm)

Horizontal

Straight tubing length

over 8 in. (200mm)

15〜90°

15〜30°

(Branch tubing

angle)

Liquid tube / Discharge tube

0〜30°

(Branch tubing

angle)

When not connecting

branch tubing to indoor

unit directly

Suction tube /

Discharge tube /

Liquid tube

Horizontal

Upward

Vertical

Downward

Header branch system

Outdoor

Indoor

6.5 ft. (2m)

(From 1st branch to tip of solidly welded part)

Horizontal line

Install at a positive angle

Vertical

Straight tubing

length over 8 in. (200mm)

15〜90°

(Main tubing is horizontal.)

Indoor

Install at a positive angle

Indoor

(15~30°)

Vertical

Straight tubing length over

Vertical

Horizontal line

Solidly welded shut (X)

8 in. (200mm)

Vertical

(15~30°)

Vertical

15〜90°

Vertical

● 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.

● Do not use the header joint system on the outdoor unit side.

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1-12. Optional Distribution Joint Kits

4-21/64

2-53/64

6-57/64

4-21/64

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 more than 232,000 BTU/h (68.0 kW) 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 more than 232,000 BTU/h (68.0 kW)* 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:

Distribution Joint

Reducing

Joints

Gas tubing Liquid tubing

6-59/64

(175) 5-5/16 (135)

Insulation

4-31/64

(114)

F E D C

Insulation

Distribution Joint

* In case the total capacity of indoor

(110)

3-13/16

(97)

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.

(72)

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

in. (mm)

ø1-3/8"

(ø34.92)

ø1-1/4"

(ø31.75)

ø1-1/8"

(ø28.58)

ø1"

(ø25.4)

ø7/8"

(ø22.22)

ø3/4"

(ø19.05)

ø5/8"

(ø15.88)

ø1/2"

(ø12.7)

2. CZ-P1350PJ1U For outdoor unit (Capacity after distribution joint is greater than 232,000 BTU/h (68.0 kW).)

Example:

Insulation

With regard to the diameter of the tube without description in Table 1-14, use a reducer (field supply) to adjust the tube diameter.

Distribution Joint

Gas tubing Liquid tubing

(175)

5-5/16

(135)

Reducing

Joints

4-31/64

(114)

: Outside dimension

Insulation

Distribution Joint

(110)

3-13/16

(97)

H I

Reducing

Joints

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

ø3/4"

ø5/8"

(ø15.88)

ø1/2"

(ø12.7)

Size Part A Part B Part C Part D Part E Part F Part G Part H Part I

in. (mm)

ø1-3/8"

(ø34.92)

ø1-1/4"

(ø31.75)

ø1-1/8"

(ø28.58)

ø1"

(ø25.4)

ø7/8"

(ø22.22)

(ø19.05)

ø3/8"

(ø9.52)

(72)

Unit: in. (mm)

ø3/8"

(ø9.52)

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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.)*

4-21/64

2-53/64

6-57/64

2-53/64

6-57/64

Example:

Insulation

(110)

3-13/16 3-13/16

(97)

Distribution Joint

Gas tubing

(72)

2-53/64

Insulation

(110)

(97)

Distribution Joint

D E

Liquid tubing

D E

Unit: in. (mm)

(72)

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"

(ø19.05)

ø5/8"

(ø15.88)

ø1/2"

(ø12.7)

ø3/8"

(ø9.52)

ø1/4"

(ø6.35)

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:

D C B

Insulation

Distribution Joint

(175)

5-5/16

(135)

Gas tubing

4-31/64

B C

E F

B C D

Reducing

Joints

E F

(114)

F G

Distribution Joint

Insulation

4-21/64

(110)

3-13/16

(97)

F G H

Liquid tubing

(72)

F G H

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

in. (mm)

ø1-1/8"

(ø28.58)

ø1"

(ø25.4)

ø7/8"

(ø22.22)

ø3/4"

(ø19.05)

ø5/8"

(ø15.88)

ø1/2"

(ø12.7)

ø3/8"

(ø9.52)

ø1/4"

(ø6.35)

5. CZ-P1350BK1U Use: For indoor unit (Capacity after distribution joint is greater than 232,000 BTU/h (68.0 kW).)*

ø5/8"

(ø15.88)

4-21/64

(110)

3-13/16

(97)

ø1/2"

(ø12.7)

Liquid tubing

Reducing

Joints

Unit: in. (mm)

ø3/8"

(ø9.52)

(72)

Example:

C D

Insulation

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

in. (mm)

ø1-3/8"

(ø34.92)

(175)

5-5/16

(135)

Distribution Joint

C D

G H

ø1-1/4"

(ø31.75)

ø1-1/8"

(ø28.58)

Gas tubing

Reducing

Joints

ø1"

(ø25.4)

C D

4-31/64

(114)

: Outside dimension

ø7/8"

(ø22.22)

ø3/4"

(ø19.05)

Distribution Joint

Insulation

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.

ø1/4"

(ø6.35)

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

CAUTION

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)

Unit of account (

)

Required additional

refrigerant charge (g)

(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)

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

For type 72 For type 96 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 “|”.

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

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 “|”.

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 “|”.

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 “|”.

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:

Outdoor unit

Type 96 Type 72

Example of all outdoor units

●

cooling capacity

Type 72: 72,000 BTU/h (21.1 kW)

Type 96: 96,000 BTU/h (28.1 kW)

[Total]

168,000 BTU/h (49.2 kW)

1 2 3 4

Example of each tubing length

●

Main tubing Distribution joint tubing

LA = 131 ft. (40m) Outdoor side Indoor side LB = 16 ft. (4.9m)

LC = 16 ft. (4.9m)

A = 7 ft.

B = 7 ft.

(2.1m) (2.1m)

1 = 98 ft. 2 = 16 ft. 3 = 16 ft. 4 = 65 ft.

Example of all indoor unit cooling capacity

●

(30m) (4.9m) (4.9m) (19.8m)

[Type 48 x 3] 47,800 x 3 = 143,400 BTU/h (14.0 x 3 = 42.0 kW)

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)

[Total] 179,400 BTU/h (52.6 kW)

Obtain 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 Indoor side

Obtain additional charge amount for each tubing size and additional refrigerant charge amount for all indoor unit cooling capacity.

●

A: ø3/8 (in.) B: ø3/8 (in.) (from outdoor unit connection tubing) 1: ø3/8 (in.) 2: ø3/8 (in.) 3: ø3/8 (in.) 4: ø3/8 (in.) (from indoor unit connection tubing)

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

ø5/8 (in.)

ø1/2 (in.)

ø3/8 (in.)

LA : 131 ft. × 1.99 oz/ft. = 261 oz (40m × 185 g/m = 7,400g)

→

LB : 16 ft. × 1.38 oz/ft. = 22 oz (4.9m × 128 g/m = 627g)

→

LC +

A – B + 1 – 4

: 225 ft. × 0.602 oz/ft. = 135 oz (68.6m × 56 g/m = 3,842g)

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.

(See the Table 1-10-2.)

Note 2) Amount of additional charge for outdoor unit (combination number) : 141oz (4,000g)

Note 3: Necessary amount of additional refrigerant charge for all indoor unit cooling capacity

[BTU/h] [kW]

179,400 BTU/h Cooling capacity (BTU/h) x 1.034 x 0.001 + 10.6 oz = 179,400 x 1.034 x 0.001 + 10.6 = 196 oz

(52.6 kW) (Cooling capacity (kW) x1000 x 0.1 + 300 = 52.6 x 1000 x 0.1 + 300 = 5,560 g)

Note 1) Amount of additional charge per tubing length : 418 oz (11,869g) Note 2) Amount of additional charge for outdoor unit (combination number) : 141 oz (4,000g) Note 3) Amount of additional charge for all indoor unit cooling capacity : 196 oz (5,560g)

Total of additional refrigerant charge amount : 755 oz (21,429g)

Therefore, the total of additional refrigerant charge amount reaches 755 oz (21,429g).

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 refrigerant charge amount (shown in the Table 1-6) at shipment in total cooling capacity of outdoor unit.

Refrigerant charge amount at shipment (total cooling capacity of outdoor unit) : : [168,000BTU/h] 684 oz [49.2kW] (19,400g) Total of additional refrigerant charge amount

755 oz (21,429g)

Grand total 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.

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2. SELECTING THE INSTALLATION SITE

CAUTION

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.

Exhaust fan

Hot air

Heat

Out-

door unit

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.

source

Leave space open above the

CAUTION

●

unit.

Construct louvers or other

●

openings in the wall, if necessary, to ensure adequate ventilation.

NOTE

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.

Example: 2 units installation

* For other installation, follow the standards of combination

installation.

Wall height: Less than 1.7ft. (500mm)

Wall height: Unlimited

* Over 2 in.

(50mm)

Over 2-3/8 in. (60mm)

Wall height: Less than 4.9 ft. (1500mm)

Over 1 ft.(300mm)

* Over 2 in. (50mm)

Over 1.7ft. (500mm)

Wall height: Unlimited

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2-2. Shield for Horizontal Exhaust Discharge

CAUTION

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.

In regions with heavy snowfall,

CAUTION

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

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.

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.

AVOID

Without snowproof ducting (Without platform)

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.

c) The platform foundation must be solid and the unit must be

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

With snowproof ducting (High platform)

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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.

unit: in. (mm)

Air direction: Front direction

30-35/64

(776)

29-29/64

(748)

27-43/64

(703)

(733)

28-55/64

(2570)

101-3/16

30-5/16

(770) (770)

Front view Right side view Front view Right side view

39-31/64

(1003)

5/64 (2)3/64 (1)

For type 120/144

Note: Can be installed so that the air direction is to the front or rear direction.

30-35/64

(776)

29-29/64

(748)

30-5/16

Air direction: Rear direction

Top viewTop view

39-31/64

(733)

28-55/64

(2570)

101-3/16

(1003)

unit: in. (mm)

3/64 (1)5/64 (2)

Air direction: Front direction

46-11/16

(1186)

45-19/32

(1158)

43-13/16

(1113)

46-29/64

(1180)

Front view Right side view Front view Right side view

3/64 (1)

(733)

28-55/64

(2570)

101-3/16

39-31/64

(1003)

5/64 (2)

46-11/16

(1186)

45-19/32

(1158)

46-29/64

(1180)

Air direction: Rear direction

Top viewTop view

39-31/64

5/64 (2)

(733)

28-55/64

(2570)

101-3/16

(1003)

3/64 (1)

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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.

unit: in. (mm)

Top view

(Before installing air-discharge chamber)

C : 28-47/64 (730) Installation hole pitch

A : 37-61/64 (964) Installation hole pitch forward tubing direction

B : 28-47/64 (730) Installation hole pitch downward tubing direction

I I

F L

Top view

39-31/64

(733)

28-55/64

(2570)

101-3/16

3/64 (1) 5/64 (2)

(1003)

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):

D E F G H I J K L M

Installation hole pitch

A :

B :

Installation hole pitch

C :

Installation hole pitch

2-23/64

(60)

7-3/32

(180)

7-3/32

(180)

2-1/8

(54)

6-27/32

(174)

6-27/32

(174)

95-29/32

(2,436)

105-23/64

(2,676)

105-23/64

(2,676)

3-35/64

(90)

8-17/64

(210)

8-17/64

(210)

94-31/64

(2,400)

103-15/16

(2,640)

103-15/16

(2,640)

3-15/64

(82)

7-61/64

(202)

7-61/64

(202)

29-9/64

(740)

29-9/64

(740)

29-9/64

(740)

30-35/64

(776)

30-35/64

(776)

30-35/64

(776)

29-29/64

Sample of middle size models (3 units):

D E F G H I J K L M

Installation hole pitch

A :

B :

Installation hole pitch

C :

Installation hole pitch

2-23/64

(60)

7-3/32

(180)

7-3/32

(180)

2-1/8

(54)

6-27/32

(174)

6-27/32

(174)

144-21/64

(3,666)

153-25/32

(3,906)

153-25/32

(3,906)

3-35/64

(90)

8-17/64

(210)

8-17/64

(210)

142-29/32

(3,630)

152-23/64

(3,870)

152-23/64

(3,870)

3-15/64

(82)

7-61/64

(202)

7-61/64

(202)

45-9/32

(1,150)

45-9/32

(1,150)

45-9/32

(1,150)

46-11/16

(1,186)

46-11/16

(1,186)

46-11/16

(1,186)

45-19/32

(1,158)

45-19/32

(1,158)

45-19/32

(1,158)

(748)

27-43/64

(703)

27-43/64

(703)

27-43/64

(703)

43-13/16

(1,113)

43-13/16

(1,113)

43-13/16

(1,113)

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