Panasonic Mini ECO-i Technical Data Manual

U-36LE1U6

MINI VRF System

U-36LE1U6E

*
U-52LE1U6
U-52LE1U6E

Model No.
Outdoor Unit

Model Name

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

Indoor Units

Class 24 36 48 54

U1

4-Way Cassette

4-Way Cassette 60×60

Y1

U-36LE1U6 U-52LE1U6
U-36LE1U6E* U-52LE1U6E*

7 9 12 15 18

*

5236Class

S-12MY1U6 S-18MY1U6

19

Section

1

Section

1

2

2

3

3

4

4

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

5

5

D1

1-Way Cassette

Low Silhouette Ducted

F1

Slim Low Static Ducted

M1

High Static Pressure

E1

Ducted

Ceiling

T1

K1

Wall Mounted

P1

Floor Standing

Concealed Floor

R1

Standing

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

85464869256000

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

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

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

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

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

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

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

S-15MM1U6 S-18MM1U6

S-18MK1U6

S-19MS1U6**S-24MK1U6

S-24MF1U6

REFERENCE NO.

S-36MF1U6 S-48MF1U6

S-36ME1U6 S-48ME1U6

TD831156-00

S-54MF1U6

6

6

7

7

8

8

IMPORTANT!
Please Read Before Starting

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

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

Carefully read this instruction booklet before beginning.

Follow each installation or repair step exactly as shown.

Observe all local, state, and national electrical codes.

Pay close attention to all warning and caution notices
given in this manual.

This symbol refers to a hazard or

WARNING

CAUTION

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.

If Necessary, Get Help

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

In Case of Improper Installation

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

SPECIAL PRECAUTIONS

WARNING

Do not supply power to the unit until all wiring and tubing

•

are completed or reconnected and checked.

Highly dangerous electrical voltages are used in this

•

system. Carefully refer to the wiring diagram and these
instructions when wiring. Improper connections and inad­equate grounding can cause accidental injury or death.

Ground the unit following local electrical codes.

•

Connect all wiring tightly. Loose wiring may cause over-

•

heating at connection points and a possible fire hazard.

To prevent possible hazards from insulation failure,

•

the unit must be grounded.

When Transporting

Be careful when picking up and moving the indoor and
outdoor units. Get a partner to help, and bend your knees
when lifting to reduce strain on your back. Sharp edges or
thin aluminum fins on the air conditioner can cut your fingers.

When Wiring

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

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.

CAUTION

…In Moist or Uneven Locations

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

…In an Area with High Winds

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

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

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

Keep the fire alarm and the air outlet at
least 5 feet away from the unit.

When Connecting Refrigerant Tubing

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

• Keep all tubing runs as short as possible.

• Use the flare method for connecting tubing.

• Apply refrigerant lubricant to the matching surfaces of
the flare and union tubes before connecting them, then
tighten the nut with a torque wrench for a leak-free con­nection.

• Check carefully for leaks before starting the test run.

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

WARNING

• Do not leak refrigerant while piping work for an
installation or re-installation, and while repairing
refrigeration parts.

Handle liquid refrigerant carefully as it may cause

frostbite.

tension inside the refrigerant
cycle.

• Refrigerant gas leakage may
cause fire.

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

i

When Servicing

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

•

Keep your fingers and clothing away from any moving
parts.

•

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

•

WARNING

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

Others

CAUTION

••Do not touch the air inlet or the
sharp aluminum fins of the
outdoor unit. You may get injured.

• Ventilate any enclosed areas when
installing or testing the refrigeration
system. Escaped refrigerant gas, on
contact with fire or heat, can produce
dangerously toxic gas.

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

•

Do not touch the air inlet or the
sharp aluminum fins of the
outdoor unit. You may get injured.

•

Do not sit or step on the unit,
you may fall down accidentally.

•

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

Check of Density Limit

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

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

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

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

ii

Precautions for Installation Using New Refrigerant

1.Care regarding tubing

1-1.Process tubing

Material:Use C1220 phosphorous deoxidized copper specified in JIS H3300 “Copper and Copper Alloy Seamless
Pipes and Tubes.”

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

CAUTION

Copper tube

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

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

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.

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

Unit: in. (mm)

OMaterial

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 of 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.

New
tool?

Manifold gauge Yes No Types of refrigerant, refrigerating machine oil, and

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

Vacuum pump Yes Yes Use a conventional vacuum pump if it is equipped

Leak detector Yes No Leak detectors for CFC and HCFC that

Flaring oil Yes No For systems that use R22, apply mineral oil (Suniso oil)

R407C tools

RemarkscompatibleItem

with R410A?

pressure gauge are different.

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

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

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

Manifold gauge

Vacuum pump

Outlet
Inlet

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

iii

3-2.Use R410A exclusive cylinder only.

Single-outlet valve

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

New refrigerant R410A cannot be used for
earlier models

1.Compressor specifications are different.

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

Valve

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)

iv

Contents

Section 1: OUTLINE OF MINI VRF SYSTEM .........................................................................

1. 1-2

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

2. 1-4

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

Section 2: DESIGN OF MINI VRF SYSTEM ..........................................................................

1. 2-2

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

2. 2-13

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

3. 2-22

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

4. 2-30

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

5. 2-38HOW TO PROCESS TUBING ......................................................................

6. 2-42AIR PURGING ..............................................................................................

7. 2-45Optional Parts ...............................................................................................

Section 3: CONTROL OF MINI VRF SYSTEM ......................................................................

1.

Main Operating Functions

2.

Wireless Remote Controller

3.

Timer Remote Controller

4.

Simplified Remote Controller

5.

System Controller

6.

Schedule Timer

7.

Intelligent Controller (CZ-256ESMC1U)

8.

Communication Adaptor (CZ-CFUNC1U)

9.

Remote Sensor

10.

LonWorks Interface (CZ-CLNC1U)

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

*

Section 4: MINI VRF SYSTEM UNIT SPECIFICATIONS .......................................................

1.

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

4-Way Cassette Type (U1 Type)

2.

4-Way Cassette 60×60 Type (Y1 Type)

3.

1-Way Cassette Type (D1 Type)

4.

Low Silhouette Ducted Type (F1 Type)

5.

Slim Low Static Ducted Type (M1 Type)

6.

High Static Pressure Ducted Type (E1 Type)

7.

Ceiling Type (T1 Type)

8.

Wall Mounted Type (K1 Type)

9.

Floor Standing Type (P1 Type)

10.

11. Concealed Floor Standing Type (R1 Type)

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

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

*

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

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

1. 5-2

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

2. 5-3

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

3. 5-4

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

4. 5-6

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

5. 5-12

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

6. 5-13

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

7. 5-13

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

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

1. 6-2
Indoor Unit

2.

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

*

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

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

1. 7-2
Indoor Unit Control PCB Switches and Functions

2.

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

*

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

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

1. 8-2

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

2. 8-10

1-1

2-1

3-1

4-1

4-2

5-1

6-1

7-1

8-1

v

Outline of Mini VRF SYSTEM

4

Contents

1. OUTLINE OF MINI VRF SYSTEM

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

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

1-

1

2

3

4

5

6

7

8

1 - 1

1

Outline of Mini VRF SYSTEM

1. Line-up

Indoor units

Type 9 191815127 3624 48 54

4-Way Cassette

(U1 Type)

4-Way Cassette

60 X 60

(Y1 Type)

1-Way Cassette

(D1 Type)

Low Silhouette

Ducted

(F1 Type)

Slim Low Static

Ducted

(M1 Type)

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

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

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

S-12MU1U6 S-18MU1U6

S-12MY1U6 S-18MY1U6

S-24MU1U6 S-36MU1U6

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

2

3

4

5

6

High Static

Pressure Ducted

(E1 Type)

Ceiling

(T1 Type)

Wall Mounted

(K1 Type)

Floor Standing

(P1 Type)

Concealed Floor

Standing

(R1 Type)

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

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

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

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

S-18MT1U6S-12MT1U6 S-24MT1U6

S-19MS1U6

*

S-24MK1U6S-18MK1U6

S-36ME1U6

S-48ME1U6

7

8

1 - 2

1. Line-up

Indoor units

Type

Capacity:
BTU/h (kW)

Cooling /
Heating

38,200 (11.2)

/ 42,700 (12.5)

U-36LE1U6/U-52LE1U6
U-36LE1U6E*/U-52LE1U6E*

Outline of Mini VRF SYSTEM

DC inverter unit

5236

52,900 (15.5)

/ 60,000 (17.6)

Outdoor
Unit

13-3/8

11-21/32

48-7/16

23/32

6-

11/16

2-

3/4

25-31/32

8-5/8

Air intake

1/2

Air
discharge

5-29/32

37

1/2

2/12/1

2-3/8

4-

5/16

25/32

13/32

3-29/32

25/32

2-25/32

13/32

14-31/32

19/32

5-1/2

4-23/32

15-15/16

7-3/4

6-9/16

3-3/16

6-13/16

Air
discharge

23-5/8

22-9/16

5-9/16

1-13/32

2-3/8

4-11/32

5-1/8

Air
intake

4-3/4

2-27/32

1

2

3

4

7-25/32

5

6-5/8

Outdoor unit model name ended with letters "U6E". Refer to the Section 1 "2. Salt-Air Damage Resistant Specifications".

*

1 - 3

6

7

8

2. Salt-Air Damage Resistant Specifications

Specifications

Relevant Parts Material Standard Specifications

Outline of Mini VRF SYSTEM

Salt-Air Damage

Resistant Specifications

Outdoor unit model name ended

with letters "U6E".

1

2

3

Outer box/side plate/
drain pan
between the stud

Base frame

Fan guard

Fin Aluminum No treatment

Tube Copper No treatment Zinc rich treatment (whole)

Tube plate

Heat

Exchanger

Propeller fan

Fan

Installation frame

Electrical component box

Tapping screws

Stud supplementary
bracket

Hot-dip zinc-coated
steel sheet

Hot-dip aluminum-zinc
coated steel sheet

Resin (Polypropylene) No treatment No treatment

Hot-dip zinc-coated
steel sheet

Resin

Aluminum

Hot-dip zinc-coated
steel sheet

--

Hot-dip zinc-coated
steel sheet

Hot-dip zinc-coated
steel sheet

SUS410

Hot-dip zinc-coated
steel sheet

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

No treatment

No treatment

No treatment

No treatment

No treatment

Motor maker's standard spec.Motor

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

No treatment

Hexavalent chromium-free
coating

No treatment

(both sides) ( 120 m)

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

Zinc rich treatment

Zinc rich treatment (whole)

No treatment

Urethane coating ( 30 m)

Urethane coating ( 30 m)

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

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

Polyester powder coating ( 120 m)

Hexavalent chromium-free coating +
urethane coating

Polyester powder double coating
( 120 m)

4

5

6

7

8

No treatment

Accumulator
Receiver tank

Welded portion Copper tube No treatment Urethane coating

Outer surface Copper tube No treatment Urethane coating

Refrigeration

cycle tube

Fixing bracket

Notes:

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

Steel Epoxy coating + alkyd coating

Hot-dip zinc-coated
steel sheet

No treatment

1 - 4

Dessicant coating (PC board 30 m)--

Zinc rich double coating + urethane
coating ( 70 m)

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

Design of Mini VRF SYSTEM

Contents

2. DESIGN OF MINI VRF SYSTEM

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

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

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

2-41-3. Calculation of Actual Capacity of Indoor Unit ................................................................

2-91-4. Capacity Correction Graph According to Temperature Condition ................................

2-111-5. Capacity Correction Graph According to Tubing Length and Elevation Difference ....

................................................................................................................... 2-132. System Design

2-132-1. Tools Required for Installation (not supplied) ..............................................................

2-13.....................................................................2-2. Accessories Supplied with Outdoor Unit

2-13..............................................................2-3. Type of Copper Tube and Insulation Material

2-132-4. Additional Materials Required for Installation...............................................................

2-14..................................................................................................................2-5. Tubing Size

2-14...........................................................................2-6. Straight Equivalent Length of Joints

2-152-7. Additional Refrigerant Charge .....................................................................................

2-15.......................................................................................................2-8. System Limitations

2-15..............................................................................................................2-9. Tubing Length

2-162-10. Check of Limit Density ...............................................................................................

2-17........................................................................................................2-11. System Example

2-19.........................2-12. Example of Tubing Size Selection and Refrigerant Charge Amount

2-21.........................................................................................2-13. Installing Distribution Joint

2-223. Electrical Wiring.................................................................................................................

2-223-1. General Precautions on Wiring ...................................................................................

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

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

4-5. 2-32Dimensions of Air-Discharge Chamber........................................................................

4-6. Dimensions of Outdoor Unit with Air-Discharge Chamber (field supply) 2-32

Indoor Unit

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

*

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

Distribution Joint Kits

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

2 - 1

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

..........................4-8. Dimensions of Outdoor Unit with Snow-Proof Ducting (field supply) 2-34

2-223-2.

2-233-3. Wiring System Diagrams .............................................................................................

2-263-4. Important Note When Wiring for Common Type .........................................................

2-293-5. Important Note When Wiring for Y1 Type.....................................................................

2-304. Installation Instructions.....................................................................................................

2-30

2-304-1. Selecting the Installation Site for Outdoor Unit ............................................................

2-314-2. ..................................................................Air Discharge Chamber for Top Discharge

2-314-3. ......................................................................Installing the Unit in Heavy Snow Areas

2-314-4. .......................................................Precautions for Installation in Heavy Snow Areas

2-34Dimensions of Snow Ducting ......................................................................................4-7.

2-37..........................................................................................Installing the Outdoor Unit4-9.

2-374-10. Drainage Work...........................................................................................................

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

2-385. HOW TO PROCESS TUBING .............................................................................................

2-385-1. Connecting the Refrigerant Tubing ............................................................................

2-395-2. Connecting Tubing Between Indoor and Outdoor Units .............................................

2-405-3. Insulating the Refrigerant Tubing ...............................................................................

2-415-4. Taping the Tubes ........................................................................................................

2-415-5. Finishing the Installation ..............................................................................................

2-426. AIR PURGING ....................................................................................................................

2-42

2-457. Optional Parts .....................................................................................................................

2-457-1.

1

2

3

4

5

6

7

8

1. Model Selecting and Capacity Calculator

1-1. Operating Range

Design of Mini VRF SYSTEM

1

2

Cooling

113

109

104

95

86

77

57

Operating
range

59

68 77 86

68

59

50

41

Outdoor air intake temp. °F (DB)

32

23

14

50

Indoor air intake temp. °F (WB)

Heating

77

68

59

50

41

32

23

14

Outdoor air intake temp. °F (WB)

5

–4

50

Indoor air intake temp. °F (DB)

Operating
range

59 68 77 86 95

3

4

5

6

7

8

2 - 2

Design of Mini VRF SYSTEM

1. Model Selecting and Capacity Calculator

1-2. Procedure for Selecting Models and Calculating Capacity

Model Selection Procedure

■

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

Calculation of the indoor air-conditioning load

●

Selection of an air conditioning system

Design of the control system

Preliminary selection of indoor and outdoor units

Check of the tubing length and elevation difference

Calculation of the corrected outdoor unit capacity

Calculation of the corrected capacity for each indoor unit

Calculation of the actual capacity for each indoor unit

Recheck of the actual capacity for each indoor unit

Design of tubing

Calculation of additional refrigerant charge amount

Design of electrical wiring capacity

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

●

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

●

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

●

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

●

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

ranges. ................................................................................................................. 2-4, 2-15 – 2-16

●

Capacity correction coefficient for outdoor temperature conditions .......................... 2-4, 2-6 – 2-7

●

Capacity correction coefficient for tubing length and elevation difference ........................ 2-4, 2-8

●

Heating capacity correction coefficient for frosting/defrosting ............................................ 2-4, 2-7

●

Capacity correction coefficient for indoor temperature conditions ..................................... 2-4, 2-8

●

Capacity distribution ratio based on the tubing length and elevation difference ... 2-4, 2-15 – 2-16

●

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

calculate the capacity correction coefficient for the indoor units. ..................................... 2-4 – 2-8

●

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

calculate the actual capacity for each indoor unit. ................................................................... 2-6

●

If the capacity is inadequate, reexamine the unit combinations.

Example 1: Increasing the outdoor unit capacity ........................................................ 2-17 – 2-18

Example 2: Increasing the indoor unit capacity .......................................................... 2-17 – 2-18

●

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

possible. ....................................................................................................................... 2-14 – 2-15

●

If tubing extension is expected in the future, create the tubing design with adequate
consideration for this extension.

●

Select the tubing size for the main tube (LA) up to the No. 1 distribution joint based on the rated
cooling capacity of the outdoor unit. Select tubing sizes after the distribution point based on the
total rated cooling capacity of the connected indoor units.

●

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

charge based only on the liquid tubing size. .......................................................................... 2-21

●

Check the minimum indoor capacity (limit density) with respect to the amount of refrigerant. If the
limit density is exceeded, be sure to install ventilation equipment or take other corrective steps. 2-22

●

Select a wiring capacity according to the method of power supply. ....................................... 2-32

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

2-2

1

2

3

4

5

6

7

2 - 3

8

1

2

3

4

5

6

7

Design of Mini VRF SYSTEM

1. Model Selecting and Capacity Calculator

1-3. Calculation of Actual Capacity of Indoor Unit

Calculating the actual capacity of each indoor unit

■

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

1. Outdoor unit capacity correction coefficient

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

(1) Capacity correction for the outdoor unit temperature conditions

From the graph of capacity characteristics on page 2-6, use the outdoor temperature to find the capacity
correction coefficient.

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

From the graph of capacity change characteristics on page 2-7, use the tubing length and elevation difference
to find the capacity correction coefficient.
The outdoor unit correction coefficient is the value which corresponds to the most demanding indoor unit.

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

From the table on page 2-7, find the capacity correction coefficient.

2. Indoor unit capacity correction coefficients

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

(1) Capacity correction for the indoor unit temperature conditions

From the graph of capacity characteristics on page 2-8, use the indoor temperature to find the capacity
correction coefficient.

(2) Capacity distribution ratio based on the indoor unit tubing length and elevation difference

First, in the same way as for the outdoor unit, use the tubing length and elevation difference for each indoor unit
to find the correction coefficient from the graph of capacity change characteristics on page 2-8. Then divide the
result by the outdoor unit correction coefficient to find the capacity distribution ratio for each indoor unit.

Capacity distribution ratio for each indoor unit (2) = Correction coefficient for that indoor unit / Correction coefficient for the outdoor uni

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

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

<Cooling>

●

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

outdoor temperature conditions ((1) Page 2-6) × Correction
coefficient for tubing length and elevation difference ((2) Page 2-8)

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

capacity [5] is considered to be 100%.

●

Corrected cooling capacity of each indoor unit (5) = Rated cooling capacity for that indoor unit × Correction

coefficient for indoor temperature conditions at that indoor unit ((1) Page 2-7) × Distribution ratio based on tubing
length and elevation difference at that indoor unit ((2) Page 2-8)

However, the corrected cooling capacity of each indoor unit is found as shown below.
If (1) < 100% and (1) × (2) > 100%: Corrected cooling capacity for that indoor unit [5] = Rated cooling capacity for that indoor unit
If (1) ≥ 100%: Corrected cooling capacity for that indoor unit (5) = Rated cooling capacity for that indoor unit × (1)

t

8

2 - 4

Design of Mini VRF SYSTEM

1. Model Selecting and Capacity Calculator

<Heating>

●

Outdoor unit corrected heating capacity (5) = Outdoor unit rated heating capacity × Correction coefficient

for outdoor temperature conditions ((1) Page 2-6) × Correction
coefficient for tubing length and elevation difference ((2) Page 2-8)

Correction coefficient for frosting/defrosting ((2) Page 2-7)

×

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

capacity is considered to be 100%.

●

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

coefficient for indoor temperature conditions at that indoor unit ((1) Page 2-6) × Distribution ratio based on tubing
length and elevation difference at that indoor unit ((2) Page 2-8).

However, the corrected heating capacity of each indoor unit is found as shown below.

length and elevation difference at that indoor unit ((3) Page 2-72)

If (1) < 100% and (1) × (2) > 100%: Corrected heating capacity for that indoor unit (5) = Rated heating capacity for that indoor unit
If (1) ≥ 100%: Corrected heating capacity for that indoor unit (5) = Rated heating capacity for that indoor unit × (1)

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

Find each correction coefficient from the appropriate conditions.

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

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

<Cooling capacity>

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

If the corrected outdoor unit cooling capacity is greater than or equal to the total corrected unit cooling capacity of
all indoor units in that system (Ruc ≤ 1), then:

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

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

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

1

2

3

4

<Heating capacity>

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

If the corrected outdoor unit heating capacity is greater than or equal to the total corrected unit heating capacity of
all indoor units in that system (Ruh ≤ 1), then:

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

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

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

2 - 5

5

6

7

8

1. Model Selecting and Capacity Calculator

Refer to the graph below for the correction coefficients for Ruc and Ruh.

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

1.0

0.9

0.8

0.7

0.6

0.5

Indoor unit capacity correction coefficient

0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9
Corrected indoor/outdoor capacity ratio (Ruc or Ruh)

Note:

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

5. Graph of capacity correction coefficients

Design of Mini VRF SYSTEM

2.0

1

2

3

4

5

6

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

■

Outdoor unit cooling capacity characteristics

120

100

80

Capacity ratio (%)

14

71°F WB

66°F WB

60°F WB

95 100

Outdoor air intake temp. (°F DB)

104
100

109

(1) U-36LE1U6, U-36LE1U6E

(1)
(2)

(1)

90
80

(2) U-52LE1U6, U-52LE1U6E

(2)

7

8

2 - 6

1. Model Selecting and Capacity Calculator

0

–

0

Outdoor unit heating capacity characteristics

Design of Mini VRF SYSTEM

U-36LE1U6, U-36LE1U6E

130
120
110
100

90
80
70
60

Capacity ratio (%)

50
40

4 5 14 23 32 41 50 59

Outdoor air intake temp. (°F DB)

Outdoor unit heating capacity correction coefficient during frosting/defrosting (1 – (2))

■

Outdoor intake air

(°F WB RH 85%)

temp.

Correction

coefficient

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

found from the capacity graph by the correction coefficient from the table above.

–4 5 14 17 21 23 24 28 30 32 33 35 37 39 41 42

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

(°F DB)

59

68

77

U-52LE1U6, U-52LE1U6E

130
120
110
100

90
80
70
60

Capacity ratio (%)

50
40

–4 5 142332415059

Outdoor air intake temp. (°F DB)

(°F DB)

59

68

77

1

2

3

4

5

6

7

8

2 - 7

1. Model Selecting and Capacity Calculator

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

■

Indoor unit cooling capacity characteristics Indoor unit heating capacity characteristics

Design of Mini VRF SYSTEM

1

2

3

120

110

100

90

80

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

Indoor air intake temp. (˚F WB)

Rate of cooling capacity change (%)

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

■

Base capacity
change rate (%)

164

131

98

66

100

33

0

-33

-66

-98

Elevation difference (ft)

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

94

96

98

%

indicates the rating point. indicates the rating point.

<Cooling>

92 90 88 86 84 82 80 78 76

Equivalent length (ft)

110

105

100

95

90

Indoor air intake temp. (˚F DB)

Rate of heating capacity change (%)

<Heating>

Base capacity
change rate (%)

164

131

98

99

66

100

33

%

0

-33

-66

-98

Elevation difference (ft)

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

97 96 95 94 93 92 91

98

Equivalent length (ft)

80

4

5

6

7

8

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

2 - 8

Design of Mini VRF SYSTEM

1. Model Selecting and Capacity Calculator

1-4. Capacity Correction Graph According to Temperature Condition

Capacity characteristics

■

(The corrected capacity for specific temperature conditions can be found from the graphs below and next page.)

<COOLING>

120

100

80

Capacity ratio (%)

100

50

Capacity ratio (%)

(1) U-36LE1U6, U-36LE1U6E

(1)
(2)

(1)

(2) U-52LE1U6, U-52LE1U6E

(2)

14

71°F WB

66°F WB

60°F WB

95 100

Outdoor air intake temp. (°F DB)

109

104
100

90
80

1

112

92

63

50

33

100104

71°F WB

66°F WB

60°F WB

124
118
114
108
100

(1)
(1)
(2)
(2)
(2)

(1) U-36LE1U6, U-36LE1U6E

(2) U-52LE1U6, U-52LE1U6E

2

3

4

14

95 100 109

Outdoor air intake temp. (°F DB)

5

6

7

8

2 - 9

1. Model Selecting and Capacity Calculator

p. (

)

<HEATING>

Design of Mini VRF SYSTEM

1

U-36LE1U6, U-36LE1U6E

130
120
110
100

90
80
70
60

Capacity ratio (%)Input ratio (%)

50
40

130
120
110
100

90
80
70
60
50

–4 5 142332415059

Outdoor air intake temp. (°F DB)

(°F DB)

59

68

77

59

68

77

U-52LE1U6, U-52LE1U6E

130
120
110
100

90
80
70
60

Capacity ratio (%)Input ratio (%)

50
40

130
120
110
100

90
80
70
60
50

–4 5 142332415059

Outdoor air intake tem

°F DB

(°F DB)

59

68

77

59

68

77

2

3

4

5

6

7

8

2 - 10

1. Model Selecting and Capacity Calculator

●

Inverter model rated performance values

Design of Mini VRF SYSTEM

Item

Cooling

Model

U-36LE1U6, U-36LE1U6E
U-52LE1U6, U-52LE1U6E

Outdoor unit heating capacity correction coefficient during frosting/defrosting (1 – (3))

■

Outdoor intake air

(°F WB RH 85%)

temp.

Correction

coefficient

–4 5 14 17 21 23 24 28 30 32 33 35 37 39 41 42

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

capacity

BTU/h(kW)

38,200 (11.2) 9,400 (2.76) 42,700 (12.5) 9,800 (2.88)
52,900 (15.5) 16,600 (4.57) 60,000 (17.6) 15,600 (4.58)

Cooling Heating

Power

consumption

BTU/h(kW)

Heating

capacity

BTU/h(kW)

Power

consumption

BTU/h(kW)

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

found from the capacity graph by the correction coefficient from the table above.

1-5. Capacity Correction Graph According to Tubing Length and Elevation Difference

Capacity change characteristics

■

<Cooling>

Base capacity
change rate (%)

164

131

98

66

100

33

0

–33

Elevation difference (ft)

–66

–98

–131

0 33 66 98 131 164 197 230 262 295 328 361

96

98

%

92 90 88 86 84 82 80 78 76

94

*1

Equivalent length (ft)

394 427

459 492

1

2

3

4

<Heating>

Base capacity
change rate (%)

164

131

98

66

33

0

–33

–66

Elevation difference (ft)

–98

–131

99

100

%

0 33 66 98 131 164 197 230 262 295 328 361

97 96 95 94 93 92 91

98

*1

Equivalent length (ft)

394 427

459 492

5

6

7

8

2 - 11

Design of Mini VRF SYSTEM

1. Model Selecting and Capacity Calculator

For U-36LE1U6(E) units

If the maximum tubing length (L1) exceeds 295 ft. (equivalent length), increase the tubing size of the main gas

■

tube (LM) by one rank.

* The size increase is applied to the gas tube only. In addition, for a 6 HP unit it is not necessary to increase the

tubing size.

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

■

Refer to Table 2-1 to increase the tubing size. However, the maximum allowable tubing length must not be
exceeded.

* The size increase is applied to the LM gas tube (main tube with the largest diameter) only, and is limited to the

cases shown in Table 2-1. In addition, the amount of additional refrigerant charge is determined from the liquid
tube size only.

* In case of 6pieces, increasing the size of the gas tube is not possible.

Table 2-1 Correction coefficient for equivalent length when the size of the gas tube (LM) is increased

1

2

3

4

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

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

Equivalent length correction coefficient

* When increasing the size of the gas tubing (LM), multiply by the correction coefficient from Table 2-1 and calculate the

equivalent length for section LM.

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

WARNING

The upper limit for tubing size is ø3/4” (ø19.05). Tubing above that size cannot be
used.

ø5/8" (ø15.88)

ø3/4" (ø19.05)

0.4

5

6

7

8

2 - 12

2. System Design

Design of Mini VRF SYSTEM

2-1. Tools Required for Installation (not supplied)

1. Flathead screwdriver

2. Phillips head screwdriver

3. Knife or wire stripper

4. Tape measure

5. Carpenter’s level

6. Sabre saw or key hole saw

7. Hack saw

8. Core bits

9. Hammer

10. Drill

11. Tube cutter

12. Tube flaring tool

13. Torque wrench

14. Adjustable wrench

15. Reamer (for deburring)

2-2. Accessories Supplied with Outdoor Unit

Table 2-2 (Outdoor Unit)

Q'ty

Patr name Figure

Tube Discharge
Assembly

U-36LE1U6

U-36LE1U6E

(4 hp)

U-52LE1U6

U-52LE1U6E

(6 hp)

01

2-3. Type of Copper Tube and Insulation Material

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

1. Deoxidized annealed copper tube for refrigerant
tubing.

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

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

3. Electrical Wiring for details.

CAUTION

2-4. 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

Check local electrical codes
and regulations before
obtaining wire. Also, check
any specified instructions
or limitations.

1

2

3

Instruction
manual

paper

11

hp = horsepower

4

5

6

7

8

2 - 13

Design of Mini VRF SYSTEM

p)

ø

5/

8

(

ø

5.

88

)

ø

(

ø

)

ø

3

(

ø

)

ø

3/8

(

ø

)

ø

3/8

(

ø

)

p)

38

p)

47,

8

p)

U/h

Ov

U/h

s

t

u

bi

g

tubi

g

U

2. System Design

2-5. Tubing Size

Table 2-3 Main Tubing Size (LA)

BTU/h (kW)

System horsepower

Gas tubing

Liquid tubing

38,200 (11.2)

4

ø5/8" (ø15.88)

ø 3/8" (ø9.52)

Note: If the system consists of only one indoor unit with an outdoor 6HP (Type 52), the main tube of the unit (LA) should be

ø19.05. Convert ø19.05 to ø15.88 using a reducer (field supply) close to the indoor unit and then make the connection.

Table 2-4 Main Tubing Size After Distribution (LB, LC...)

Total capacity
after distribution

Tubing size

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.

Below BT

er BT

Liquid

n

n

52,900 (15.5)

ø 3/4" (ø19.05)

24,200 (2.5 h

1/2"

12.7

"

9.52

6

Unit: in. (mm)

,200 (4 h

"

00 (5 hp)52,900 (6 h

24,200 (2.5 h

1

"

9.52

/4"

19.05
it: in. (mm)

hp = horsepower

1

2

3

4

5

6

Table 2-5 Indoor Unit Tubing Connection ( 1, 2...

7 9 12 18 3624 48Indoor unit type

Gas tubing

Liquid tubing

ø

1/2" (ø12.7)

ø

1/4" (ø6.35)

n–1

)

5415 19

ø

5/8" (ø15.88)

ø

3/8" (ø9.52)

Unit: in. (mm)

2-6. Straight Equivalent Length of Joints

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

1.1

0.9

3.4

9.2

Unit: ft.

3/4" (19.05)

1.4

1

4.1

10.5

Table 2-6 Straight Equivalent Length of Joints

Gas tubing size (in. (mm))

elbow

90°

45°

elbow

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

Trap bend

Y-branch distribution joint

Ball valve for ser

vice

1/2" (12.7)

0.8

7.5

Equivalent length conversion not needed.

Equivalent length conversion not needed.

5/8" (15.88)

1

3

Unit: in. (mm)

over 5/128 (1.0)

7

Table 2-7 Required Copper Tubing Dimensions

Material O

Copper tube

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

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

8

2 - 14

Design of Mini VRF SYSTEM

2. System Design

2-7. Additional Refrigerant Charge

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

Table 2-8 Amount of Refrigerant Charge Per Feet, According to Liquid Tubing Size

Liquid tubing size

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

ø1/4” (ø6.35) 0.279

ø3/8” (ø9.52) 0.602

Table 2-9 Refrigerant Charge Amount at Shipment (for outdoor unit)

Amount of refrigerant

Required amount of charge = (Amount of refrigerant
charge per ft. of each size of liquid tube × its tube
length) + (...) + (...)

*Always charge accurately using a scale for weighing.

Heat pump unit
(Single-phase)(oz)

2-8. System Limitations

Table 2-10 System Limitations

Outdoor units

Number of max. connectable indoor units 6 9
Max. allowable indoor/outdoor capacity ratio 50 – 130%

2-9. Tubing Length

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

Main tube of unit

U-36LE1U6E

LA

U-36LE1U6

123 123

U-36LE1U6

U-36LE1U6E

L1
L2

LCLB

U-52LE1U6

U-52LE1U6E

LD

U-52LE1U6

U-52LE1U6E

n

H1

1

2

3

4

5

1st branch

1

L3

Unit distribution tube

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

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

unit connections and tubing branches.

23

2 - 15

n-1

H2

R410A distribution joint
CZ-P160BK1U (for indoor unit)

6

7

8

Design of Mini VRF SYSTEM

2. System Design

Table 2-11 Ranges that Apply to Refrigerant Tubing Lengths and to Differences in Installation Heights

Items Marks Contents Length (ft.)

>

>

>

131

>

262

>

>

656

>

>

>

Allowable tubing
length

Allowable elevation
difference

L = Length, H = Height

L1 Max. tubing length

L (L2 – L3)

LA

...

1, 2

n

+2+...

1

n-1

H1

H2 Max. difference between indoor units 49

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

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

Max. length of each distribution tube 98

Total max. tubing length including length of

+L1

each distribution tube (only narrow tubing)

When outdoor unit is installed higher than indoor unit 164

When outdoor unit is installed lower than indoor unit 131

Actual length 492

Equivalent length 574

1

2

3

4

5

WARNING

2-10. 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.

CAUTION

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

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

6

7

8

2 - 16

2. System Design

2-11. System Example

(1) Below are the tables created using the “PAC System Diagram Software.”

Details of the calculations are shown in (2).

Outdoor

unit

Design of Mini VRF SYSTEM

131 ft.

Elevation
difference: 33 ft.

Selection conditions

Assumes that installation is in a 60 Hz region.

Outdoor unit

Selected model

Air condition

Cooling

Heating

Actual tubing length

Equivalent length (with
consideration for curves, etc.)

Preliminary selection

Selected model
Load (cooling/heating) (BTU/h)

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

(5) Corrected capacity

(7) Actual capacity

Total corrected capacity of indoor units (cooling/heating) = 32,800 / 39,100
Ruc = 32,800 / 33,200 = 0.988 < 1 Ruh = 39,100 / 33,700 = 1,160 > 1

Outdoor unit changes

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

Selected model

Maximum load
(cooling/heating) (BTU/h)

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

(5) Corrected capacity

(7) Actual capacity

Total corrected capacity of all indoor units (cooling/heating) = 32,800 / 39,100

Ruc = 32,800 / 45,900 = 0.715 < 1 Ruh = 39,100 / 47,300 = 0.827 < 1

(DB/WB)

Max. load (BTU/h)

Air condition
(DB/WB)

Max. load (BTU/h)

(cooling/heating) (BTU/h)

(cooling/heating) (BTU/h)

(cooling/heating) (BTU/h)

(cooling/heating) (BTU/h)

U-36LE1U6 (U-36LE1U6E)

91.0 / 72.0

37.0 / 35.0 69.0 / 55.0 69.0 / 55.0 69.0 / 55.0 69.0 / 55.0

246 ft.

295 ft. 197 ft. 236 ft. 276 ft. 295 ft.

Outdoor unit

U-36LE1U6 (U-36LE1U6E)

38,200 / 42,700

33,200 / 33,700

Outdoor unit

U-52LE1U6 (U-52LE1U6E)

52,900 / 60,000

45,900 / 47,300

Indoor

unit 1

33 ft.

33 ft.

(indoor unit 1)

78.0 / 64.0

(indoor unit 1)

10,000 / 12,000

12,000 / 14,000

11,700 / 14,000

11,700 / 12,200

(indoor unit 1)

10,000 / 12,000

12,000 / 14,000

11,700 / 14,000

11,700 / 14,000

33 ft. 49 ft.

33 ft.

Indoor

unit 2

Room 1

Type 12 Type 7 Type 7 Type 7

10,000 7,000 7,000 7,000

Room 1

Type 12 Type 7 Type 7 Type 7

Room 1

Type 12 Type 7 Type 7 Type 7

2 - 17

33 ft.

Indoor

unit 3

Room 2

(indoor unit 2)

78.0 / 64.0 78.0 / 64.0 78.0 / 64.0

Room 2

(indoor unit 2)

7,000 / 8,400 7,000 / 8,400 7,000 / 8,400

7,500 / 8,500

7,200 / 8,400

7,200 / 7,400 7,000 / 7,300

Room 2

(indoor unit 2)

7,000 / 8,400 7,000 / 8,400 7,000 / 8,400

7,500 / 8,500

7,200 / 8,400

7,200 / 8,400

Indoor

unit 4

Room 3

(indoor unit 3)

Room 3

(indoor unit 3)

7,500 / 8,500

7,000 / 8,400

Room 3

(indoor unit 3)

7,500 / 8,500

7,000 / 8,400

7,000 / 8,400

(indoor unit 4)

(indoor unit 4)

7,500 / 8,500

6,900 / 8,300

6,900 / 7,300

(indoor unit 4)

7,500 / 8,500

6,900 / 8,300

6,900 / 8,300

Room 4

8,4008,4008,40012,000

246 ft.230 ft.197 ft.164 ft.

Room 4

Room 4

1

2

3

4

5

6

7

8

1

2

3

4

5

Design of Mini VRF SYSTEM

2. System Design

Indoor unit changes

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

Outdoor unit

Selected model

Maximum load
(cooling/heating) (BTU/h)

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

(5) Corrected capacity

(cooling/heating) (BTU/h)

(7) Actual capacity

(cooling/heating) (BTU/h)

Total corrected capacity of all indoor units (cooling/heating) = 36,900 / 44,500
Ruc = 36,900 / 45,900 = 0.804 < 1 Ruh = 44,500 / 47,300 = 0.941 < 1

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

U-52LE1U6 (U-52LE1U6E)

52,900 / 60,000

45,900 / 47,300

Room 1

(indoor unit 1)

Type 12 Type 7 Type 12Typ e 7

10,000 / 12,000

12,000 / 14,000

11,700 / 14,000

11,700 / 14,000

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

[From calculation of the correction coefficient to calculation of actual capacity] (Cooling/heating)

Outdoor unit

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

(1) Model

(2) Temp. condition

(3) Tubing length,

elevation difference

coefficient

Correction

(4) Frosting • defrosting

Result of (2) × (3)

Correction coefficient
applied to indoor unit *1

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

(6) Correction coefficient

for corrected capacity
ratio

(7) Actual capacity (BTU/h)

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

52,900 / 60,000

1.00 / 1.00

1.020 / 0.937 0.920 / 0.980

0.851 / 0.946 1.000 / 1.0001.062 / 1.020 1.012 / 1.0041.037 / 1.012

— / 0.890

45,900 / 47,300

Room 1

(indoor unit 1)

12,000 / 14,000

0.977 / 1.000 0.954 / 0.992 0.992 / 0.984 0.920 / 0.980

0.977 / 1.000 0.954 / 0.992

11,700 / 14,000

11,700 / 14,000

Room 2

(indoor unit 2)

7,000 / 8,400 7,000 / 8,400 7,000 / 8,400

7,500 / 8,500 7,500 / 8,500

7,200 / 8,400 7,000 / 8,400

7,200 / 8,400 7,000 / 8,400

Room 2

(indoor unit 2)

7,500 / 8,500 7,500 / 8,500

0.920 / 0.980 0.920 / 0.980 0.920 / 0.980

7,200 / 8,400

1.00 / 1.00

7,200 / 8,400 7,000 / 8,400

Room 3

(indoor unit 3)

12,000 / 14,000

11,000 / 13,700

11,000 / 13,700

Room 3

(indoor unit 3)

12,000 / 14,000

0.992 / 0.984 0.920 / 0.980

7,000 / 8,400

11,000 / 13,700

11,000 / 13,700

Room 4

(indoor unit 4)

Room 4

(indoor unit 4)

6

7

8

The actual capacity is calculated as shown below.

Cooling: Ruc = (11,700 + 7,200 + 7,000 + 11,000) / 45,900 = 0.804 < 1
Therefore,
Actual cooling capacity of each indoor unit = Corrected cooling capacity of each indoor unit
(In other words, the correction coefficient [6] for the corrected capacity ratio is 1.)

Heating: Ruh = (14,000 + 8,400 + 8,400 + 13,700) / 47,300 = 0.941 < 1
Therefore,
Actual heating capacity of each indoor unit = Corrected heating capacity of each indoor unit
(In other words, the correction coefficient (6) for the corrected capacity ratio is 1.)

2 - 18

Design of Mini VRF SYSTEM

2. System Design

2-12. Example of Tubing Size Selection and Refrigerant Charge Amount

Additional refrigerant charging

Based on the values in Tables 2-3, 2-4, 2-5 and 2-8, use the liquid tubing size and length, and calculate the amount
of additional refrigerant charge using the formula below.

Required additional
refrigerant charge (oz)

(a): Liquid tubing Total length of ø3/8” (ø9.52) (ft.) (b): Liquid tubing Total length of ø1/4” (ø6.35) (ft.)

●

Charging procedure

Be sure to charge with R410A refrigerant in liquid form.

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

2. If it was not possible to charge the designated amount, operate the system in Cooling mode while charging
with refrigerant from the gas tubing side. (This is performed at the time of the test run. For this, all valves
must be in the “fully open” position.)
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.

= 0.602 × (a) + 0.279 × (b)

1

2

Tightening torque for valve stem cap: 160 – 180 lbs

Tightening torque: 300 – 360 lbs

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.

3

4

5

Tightening torque: 590 – 710 lbs

4

·

in.

·

in.

3

1

2

Tightening torque for valve stem cap: 240 – 280 lbs

·

in.

·

in.

6

7

8

2 - 19

2. System Design

Example:

Design of Mini VRF SYSTEM

1

2

3

4

LA

Main tube of unit

1st branch

Unit distribution tube

●

Example of each tubing length

Main tubing Distribution joint tubing

LA = 131 ft. Indoor side
LB = 16 ft. 1 = 16 ft. 4 = 20 ft.
LC = 16 ft. 2 = 16 ft. 5 = 16 ft.
LD = 49 ft. 3 = 7 ft.

●

Obtain charge amount for each tubing size
Note that the charge amounts per 3.3 ft. are different for each liquid tubing size.
ø3/8" (ø9.52) → LA + LB + LC + LD : 212 ft. × 0.602 oz/ft. = 127 oz
ø1/4" (ø6.35) → 1 + 2 + 3 + 4 + 5 : 75 ft. × 0.279 oz/ft. = 20 oz

Total 147 oz
Additional refrigerant charge amount is 147 oz.

Be sure to check the limit density

CAUTION

for the room in which the indoor
unit is installed.

1

model 7 model 9 model 12 model 18

L1
L2

LCLB

23

LN

n–1

n

model 18

5

6

7

8

2 - 20

2. System Design

Design of Mini VRF SYSTEM

2-13. Installing Distribution Joint

(1) Refer to “HOW TO ATTACH DISTRIBUTION

JOINT” enclosed with the optional distribution
joint kit (CZ-P160BK1U).

(2) In order to prevent accumulation of refrigerant oil

in stopped units, if the main tubing is horizontal
then each branch tubing length “B” should be at
an angle that is greater than horizontal. If the main
tubing is vertical, provide a raised starting portion
for each branch.

When only one indoor unit is connected to the side of
“A”, install part “A” at a positive angle (15-30°) for the

fi eld tubing as shown in the fi gure.

(3) If there are height differences between indoor units

or if branch tubing that follows a distribution joint
is connected to only 1 unit, a trap or ball valve
must be added to that distribution joint. (When
adding the ball valve, locate it within 1.3 ft. of the
distribution joint.)

If a trap or ball valve is not added, do not operate
the system before repairs to a malfunctioning
unit are completed. (The refrigerant oil sent
through the tubing to the malfunctioning unit will
accumulate and may damage the compressor.)

Tube branching methods (horizontal use)

A

Arrow view D

15 to 30°

B

view D

Types of vertical trap specifications

(When using ball valve)

Main tubing

Ball valve

(BV: purchased

separately)

Indoor unit (1)

(When not using ball valve)

Main tubing

Branch tubing is
directed upward.

Indoor unit is directed downward

B

Arrow view C

A

Indoor unit (more than 2 units)

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

Horizontal

Indoor unit

More than
8 in.

Horizontal
line

view C

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

15 to 30°

B

A

View as seen
from arrow

1

2

3

4

2 - 21

5

6

7

8

1

3. Electrical Wiring

3-1. General Precautions on Wiring

Before wiring, confirm the rated voltage of the unit

(1)

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

Provide a power outlet to be used exclusively for

(2)

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

To prevent possible hazards from insulation failure,

(3)

the unit must be grounded.

(4)

Each wiring connection must be done in
accordance with the wiring system diagram.
Wrong wiring may cause the unit to misoperate or
become damaged.

Do not allow wiring to touch the refrigerant tubing,

(5)

compressor, or any moving parts of the fan.

(6)

Unauthorized changes in the internal wiring can be
very dangerous. The manufacturer will accept no
responsibility for any damage or misoperation that
occurs as a result of such unauthorized changes.

Design of Mini VRF SYSTEM

(7)

Regulations on wire diameters differ from locality
to locality. For field wiring rules, please refer
to your LOCAL ELECTRICAL CODES before
beginning.

You must ensure that installation complies with all
relevant rules and regulations.

(8)

To prevent malfunction of the air conditioner
caused by electrical noise, care must be taken
when wiring as follows:

The remote control wiring and the inter-unit control
wiring should be wired apart from the inter-unit
power wiring.

Use shielded wires for inter-unit control wiring
between units and ground the shield on both sides.

(9)

If the power supply cord of this appliance is
damaged, it must be replaced by a repair shop
appointed by the manufacturer, because special
purpose tools are required.

2

3

4

5

6

7

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

Outdoor unit

Type

U-36LE1U6
U-36LE1U6E

U-52LE1U6
U-52LE1U6E

Indoor unit

Type

K1

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

E1

Control wiring

(A) Inter-unit (between outdoor and

indoor units) control wiring*

AWG #18 (0.75 mm

Max. 3,280 ft.

Time delay fuse or

circuit capacity

30 A

50 A

Time delay fuse or

circuit capacity

15 A

15 A

15 A

(B) Remote control wiring

2

)

AWG #18 (0.75 mm

Max. 1,640 ft.

(C) Control wiring for group control

2

)

AWG #18 (0.75 mm2)

Max. 650 ft. (Total)

8

NOTE

* With ring-type wire terminal.

2 - 22

3. Electrical Wiring

3-3.Wiring System Diagram

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

Remote
Controller

WHT
BLK

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

Remote
Controller

WHT
BLK

Group control:

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

L1
L2

Ground

1

1

2

2

L1
L2

Ground

1

1

2

2

L1
L2

Ground

Design of Mini VRF SYSTEM

Indoor

C

unit (No. 1)

L1

L2

U1

U2

R1

R2

Indoor
unit (No. 2)

L1

L2

U1

U2

R1

R2

Indoor
unit (No. 3)

L1

L2

U1

U2

R1

R2

Outdoor unit

A

A

INV unit

*

NOTE:

L1

1

L2

2

*

L1
L2

Ground

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

* Disconnect switch

(Field Supply)

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

ALWAYS COMPLY WITH NATIONAL AND

A

LOCAL CODE REQUIREMENTS.

Outdoor Unit

5P terminal board

A

1

*

B

*

B

*

K1 Type

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

Remote
Controller

2

BLK

1

WHT

CONNECTOR
2P (WHT)

L1
L2

Ground

BLK
WHT

BLK
WHT

*

B

Indoor
unit (No. n)

BLK
WHT

L1

L2

U1

U2

3

1

NOTE

(1)

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

(2)

The basic connection diagram of the indoor
unit shows the 6P terminal board, so the
terminal boards in your equipment may differ
from the diagram.

(3)

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

(4)

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

RC

(BLU)

Indoor Unit

U1, E1 Types

7P terminal board

1(L1) 2(L2)

Power
supply

K1 Type
Model : S-07MK1U6

S-09MK1U6
S-12MK1U6

5P terminal board 5P terminal board

1

(L1)2(L2)

Power

supply

L1 1

L2

2

Power
supply

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

6P terminal board

L1 L2 U1 U2 R1 R2

U2

U1

R1

Unit

control

Line

R2

Remote

control

Line

Power
supply

K1 Type
Model : S-18MK1U6

U1 U2 U1 U2

Unit

control

1

(L1)2(L2)

Power
supply

Line

Unit

control

Line

S-19MS1U6
S-24MK1U6

control

Remote

control

Line

Unit

Line

2

3

4

5

6

7

8

2 - 23

Design of Mini VRF SYSTEM

3. Electrical Wiring

CAUTION

(1) When linking outdoor units in a network, disconnect the terminal extended from the short plug (CN003,

2P Black, location: right bottom on the outdoor main control PCB) from all outdoor units except any one
of the outdoor units.
(When shipping: In shorted condition.)

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

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

1

2

3

4

Outdoor unit Outdoor unit Outdoor unit

Prohibited

Indoor unit Indoor unit Indoor unit Indoor unit

Fig. 2-1

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

address setting.

Outdoor unit Indoor unit Indoor unit

NO

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

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

Outdoor unit

Indoor unit Indoor unit

Branch point

Fig. 2-2

Outdoor unit

Prohibited

Indoor unit

Outdoor unit

5

6

7

8

Branch
point

16 or fewer

Indoor unit Indoor unit Indoor unit Indoor unit

more than 3.3 ft

Indoor unit

more than 3.3 ft

Indoor unit

less than 3.3 ft

Indoor unit

Indoor unit Indoor unit Indoor unit

Fig. 2-3

2 - 24

3. Electrical Wiring

Loose wiring may cause

WARNING

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

How to connect wiring to the terminal

For stranded wiring

Cut the wire end with cutting pliers, then strip the

(1)

insulation to expose the stranded wiring approx.
3/8 in. and tightly twist the wire ends. (Fig. 2-4)

Using a Phillips head screwdriver, remove the

(2)

terminal screw(s) on the terminal plate.

(3)

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

(4)

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

the terminal to overheat or
result in unit malfunction.
A fire hazard may also
exist. Therefore, ensure
that all wiring is tightly
connected.

Special
washer

Wire

Stranded wire

Strip 3/8"

Fig. 2-4

Screw

Ring pressure
terminal

Terminal plate

Fig. 2-5

Design of Mini VRF SYSTEM

Ring
pressure
terminal

Screw and
Special washer

Ring
pressure
terminal

Wire

1

2

3

4

5

6

7

8

2 - 25

3. Electrical Wiring

Design of Mini VRF SYSTEM

1

2

3-4. Important Note When Wiring for Common Type

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

1.

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

Connect the power supply wires to “L1, L2” of the

2.

terminal block. Be sure to connect the grounding
conductor of the incoming power supply to the earth
(ground) screw.

Securely affix the power supply wires and remote

3.

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

Clamping clip

Twist

NOTE

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

U1 Type

Earth screw

Power wiring
(field supplied)

Clamping
clip

Conduit

Connection for
Solenoid Valve Kit
(for 3WAY)

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

3

4

5

6

7

8

Clamping
clip

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

Earth screw

Conduit
(field supplied)

Power wiring
(field supplied)

F1 TypeD1 Type

Earth screw

Power wiring
(field supplied)

Conduit
(field supplied)

Clamping
clip

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

Connection for Solenoid
Valve Kit (for 3WAY)

2 - 26

3. Electrical Wiring

Important Note When Wiring for Common Type (Continued)

Design of Mini VRF SYSTEM

E1 Type

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

Earth screw

Power wiring
(field supplied)

Clamping
clip

Conduit
(field supplied)

T1 Type

Clamping
clip

Earth screw

Remote control wiring
(field supplied)

Power wiring
(field supplied)

1

Conduit
(field supplied)

2

M1 Type

Earth screw

Power wiring
(field supplied)

Clamping
clip

Conduit
(field supplied)

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

P1, R1 Type

Clamping clip

Power wiring
(field supplied)

Earth screw

Conduit

Optional remote control
wiring (field supplied)

Connection
for Solenoid
Valve Kit
(for 3WAY)

3-way connection wiring
with harness(supplied)

3

4

5

6

7

8

2 - 27

3. Electrical Wiring

Important Note When Wiring for Common Type (Continued)

K1 Type

Design of Mini VRF SYSTEM

1

2

Model : S-07MK1U6

S-09MK1U6
S-12MK1U6

Power wiring
(field supplied)

Conduit
(field supplied)

Clamping
strap

Connection for Solenoid
Valve Kit (for 3WAY)

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

3

4

5

6

7

K1 Type

Model : S-18MK1U6

S-19MS1U6*
S-24MK1U6

Power wiring
(field supplied)

Earth screw

Clamping
strap

Conduit
(field supplied)

Connection for Solenoid
Valve Kit (for 3WAY)

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

8

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

2 - 28

3. Electrical Wiring

3-5. Important Note When Wiring for Y1 Type

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

1.

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

2.

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

3.

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

Design of Mini VRF SYSTEM

Y1 Type

Connection for Solenoid

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

Clasp

Power wiring
(field supplied)

NOTE

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

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

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

Conduit
(field supplied)

Earth screw

Clamping clip

1

2

3

4

5

6

2 - 29

7

8

1

2

3

4

4. Installation Instructions

4-1. Selecting the Installation Site for Outdoor Unit

AVOID:

heat sources, exhaust fans, etc.(Fig.2-6)

damp, humid or uneven locations

DO:

choose a place as cool as possible.

choose a place that is well ventilated and outside
air temperature does not exceed maximum 113°F
constantly.

allow enough room around the unit for air intake/
exhaust and possible maintenance.(Fig.2-7)

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

Installation space

Distance between obstructions and the unit air inlet
and outlet must be as shown below.

*3

Inlet side C

More than 25/64" More than 25/64"

*2

CAUTION

Outlet side
More than

3.3 ft.

*1

Fig. 2-7

Concerning inlet-side distance “C” (Fig. 2-7)
The minimum for distance “C” is 6 in. if there are no obstructions on the outlet side
(wall *1 side) and *2 or *4 is not present. In all other cases, the minimum for distance
“C” is 8 in.

*4

Air direction chamber

(field supply)

Hot air

Out­door
unit

Fig. 2-6

(Obstruction above unit)

*1

Fig. 2-8

Design of Mini VRF SYSTEM

Exhaust fan

Heat source

B

A

Inlet side
More than 8 in.

(Obstruction on
inlet side)

(Ground)

5

6

7

8

If the unit is installed with the outlet side facing wall *1, then there must be no obstruc­tions on 2 of the remaining 3 sides: *2, *3, *4.

If wall *1 is on the outlet side (Fig. 2-7), or if obstructions are present on all 3 sides *2,
*3, and *4 (Fig. 2-7), then the minimum distance for “A” and “B” is 6.6 ft. (Fig. 2-9).
Even if there is no wall on the outlet side, a minimum of 3.3 ft.is required.

In case of multiple installations

provide a solid base (concrete block, 4 ×16 in.
beams or equal), a minimum of 6 in. above ground
level to reduce humidity and protect the unit against
possible water damage and decreased service life.
(Fig. 2-9)

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

Anchor bolts
(4 pieces)

Fig. 2-9

2 - 30

4. Installation Instructions

4-2. Air Discharge Chamber for Top Discharge

Be sure to install an air discharge chamber (field sup­ply) in the field when:

it is difficult to keep a space of min.20 in.between
the air discharge outlet and an obstacle.

the air discharge outlet is facing a sidewalk and
discharged hot air may annoy passers-by.
Refer to Fig.2-10.

4-3. Installing the Unit in Heavy Snow Areas

In locations with strong wind, snow-proof ducting
(field supply) should be fitted and direct exposure to
the wind should be avoided as much as possible.

Countermeasures against snow and wind

In regions with snow and strong wind, the following
problems may occur when the outdoor unit is not pro­vided with a platform and snow-proof ducting:

Design of Mini VRF SYSTEM

Air discharge

Fig. 2-10

In regions with significant snowfall, the outdoor unit should
be provided with a platform and snow-proof ducting.

The outdoor fan may not run and damage to the

a)

unit may occur.

b)

There may be no air flow.

c)

The tubing may freeze and burst.

d)

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

4-4. Precautions for Installation in Heavy Snow

Areas

The platform should be higher than the max. snow

(1)

depth. (Fig. 2-11)

The 2 anchoring feet of the outdoor unit should be

(2)

used for the platform, and the platform should be
installed beneath the air intake side of outdoor
unit.

The platform foundation must be firm and the unit

(3)

must be secured with anchor bolts.

(4)

In case of installation on a roof subject to strong
wind, countermeasures must be taken to prevent
the unit from being blown over.

Without snow­proof ducting
(Low platform)

Fig. 2-11

Outdoor
Unit

Duct

1

2

3

With snow­proof ducting
(High platform)

4

5

6

2 - 31

Air
Intake

7

8

Fig. 2-12

4. Installation Instructions

4-5. Dimensions of Air-Discharge Chamber
Reference diagram for air-discharge chamber (field supply)

1

Unit front, air discharge chamber

2

Unit left side, air discharge chamber

3

Unit right side, air discharge chamber

4

Reinforcement brackets, 4 locations

9-7/161-1/8

Rectangular
hole

2

1

1-3/821-5/32

Design of Mini VRF SYSTEM

11-13/16

3

4

9-27/32

9-7/16

Rectangular
hole

1-1/8

1-3/8

12-15/3221-5/32

1

2

3

4

5

9-27/32

39-1/4

Rectangular
hole

2-3/4

12-15/32

22-13/32
21-13/321 1

12-7/329-27/32

4-6. Dimensions of Outdoor Unit with Air-Discharge Chamber (field supply)

11-13/16

4-5/16

1/2

25/3225/32

14-31/32 13/3219/32

15-15/16

4-1/439-1/4

11-13/16

Wind direction

1/2 1/2

Wind

direction

13-3/8

2-11/36 21-13/32

25-31/326-11/16

Wind direction

37

42-29/32

Rectangular
hole

2-3/4

Unit:in.

6

7

8

Wind
direction

48-7/16

Wind
direction

23/32

Wind
direction

Wind
direction

2 - 32

Wind direction

Unit:in.

Design of Mini VRF SYSTEM

4. Installation Instructions

Reference for air-discharge chamber (field supply)
Required space around outdoor unit

If an air discharge chamber is used, the space shown below must be secured around the outdoor unit.
If the unit is used without the required space, a protective device may activate, preventing the unit from operating.

(1) Single-unit installation

Min. 7-7/8

Min. 39-3/8

Unit:in.

The top and both sides must remain open.

CAUTION

If there are obstacles to the front and rear of the outdoor unit,
the obstacle at either the front or rear must be no taller than the
height of the outdoor unit.

(2) Multiple-unit installation

Installation in lateral rows

More than 7-7/8

CAUTION

Installation in front-rear rows

intakes or outlets facing outlets

More than 59-1/16

More than 11-13/16More than 11-13/16

More than 15-3/4

The front and top must remain open.
The obstacles must be no taller than the height of the outdoor unit.

Installation with intakes facing outletsInstallation with intakes facing

More than 15-3/4

More than 78-3/4

1

2

3

4

5

6

CAUTION

The front and both sides must remain open.

2 - 33

Unit: in.

7

8

4. Installation Instructions

4-7. Dimensions of Snow Ducting
Reference diagram for snow-proof ducting (field supply)

Fastened by screws at 13 locations

1

Unit top, snow-proof vent

2

Unit left side

3

Unit right side

4

Unit reverse side

Design of Mini VRF SYSTEM

30-3/32

4

1

2

3

3

9-3/16

28-13/16

47-19/32

Fastened by screws at
3 locations (also on reverse side)

Fastened by screw at
1 location (also on reverse side)

25-13/32

17-15/32

15-9/32

3-3/4 19-11/16

5-29/32

25/32

17-23/32

19-11/16

Unit anchor hole

(7 – ø9/32 hole)

1-5/8 28-3/4

30-5/8

4-8. Dimensions of Outdoor Unit with Snow-Proof Ducting (field supply)

Wind direction

30-3/32

Wind direction

7-1/16

13-5/1619-11/16

5/8

3-31/32

Unit: in.

11-7/8

1-3/16

2

9-3/16

28-13/16

47-19/32

1

4

5

6

7

8

25-13/32

48-7/16

47-19/32

Wind direction

24-7/8

Wind direction

37

25/3225/32

14-31/32 13/3219/32

2 - 34

15-15/16

Wind direction

Unit: in.

11-29/32

28-13/16

Wind direction

4. Installation Instructions

Reference diagram for snow-proof ducting – 1

Space requirements for setting – (1)

Design of Mini VRF SYSTEM

[Obstacle to the rear of unit]

Top is open:

(1) Single-unit installation

(2) Obstacles on both sides

Min. A

Min. B

(3) Multiple-unit installation (2 or more units)

Min. E Min. E Min. E

Min. C

[Obstacle to the front of unit]

Top is open:

(1) Single-unit installation

Min. D

(2) Multiple-unit installation (2 or more units)

Min. I Min. I

Min. G

HIJ

19-11/16 11-13/16 39-3/8

Min. H

1

Min. J

2

Min. F

AB DCEFG

5-29/32 5-29/32 7-7/8

11-13/16 11-13/16

5-29/32 7-7/8

Note: In cases 2 and 3 the height of the obstacle
must be no taller than the height of the outdoor
unit.

Top is blocked by an obstacle:

Min. L

Min. K

KL

19-11/16

5-29/32

Top is blocked by an obstacle:

Min. M

MN

39-3/8

39-3/8

Min. N

3

4

5

6

7

2 - 35

Unit: in.

8

4. Installation Instructions

Reference diagram for snow-proof ducting – 2

Space requirements for setting – (2)

[Obstacles to the front and rear of unit]

The top and both sides must remain open. Either the obstacle to the front or
the obstacle to the rear must be no taller than the height of the outdoor unit.

(1) Single-unit installation

Design of Mini VRF SYSTEM

1

2

3

4

Q

Min. P

Min. O

(2) Obstacles on both sides

Min. 11-13/16

[Installation in front-rear rows]

The top and both sides must remain open. Either the obstacle to the front or the obstacle
to the rear must be no taller than the height of the outdoor unit.

Min. 39-3/8 Min. 7-7/8

Min. 11-13/16

Min. 11-13/16

Min. 59-1/16 Min. 78-3/4

Dimension Q
If a snow protection duct is attached after the unit is

installed, verify that dimension Q is 19-11/16" or more.

OP

39-3/8

5-29/32

Q

Min. 7-7/8

Min. 39-3/8

Q

5

6

7

8

Dimension Q
If a snow protection duct is

attached after the unit is
installed, verify that dimension
Q is 19-11/16" or more.

Unit:in.

2 - 36

4. Installation Instructions

4-9. Installing the Outdoor Unit

Use concrete or a similar material to create the base, and
ensure good drainage.

Ordinarily, ensure a base height of 2" or more. If a drain pipe
is used, or for use in cold-weather regions, ensure a height
of 6" or more at the feet on both sides of the unit.
(In this case, leave clearance below the unit for the drain
pipe, and to prevent freezing of drainage water in
cold-weather regions.)

Refer to the Fig. 2-13 for the anchor bolt dimensions.

Be sure to anchor the feet with the anchor bolts (M10 or
3/8"). In addition, use anchoring washers on the top side.
(Use large square 1-1/4"×1-1/4" SUS washers with
diameters of 3/8".) (Field supply)

4-10. Drainage Work

Follow the procedure below to ensure adequate draining for
the outdoor unit.

For the drain port dimensions, refer to the figure at right.

Ensure a base height of 6" or more at the feet on both sides
of the unit.

Design of Mini VRF SYSTEM

Drain port (2 locations)

6-47/64 25-63/64 4-3/8

5-29/328-5/8

13-13/64

11-21/32

33/64

33/64 33/64

33/64

37

25/32

3/4

25/64

14-61/64

15-15/16

19/32

1

4-11. Routing the Tubing and Wiring

The tubing and wiring can be extended out in 4 directions:
front, rear, right, and down.

The service valves are housed inside the unit. To access
them, remove the inspection panel. (To remove the
inspection panel, remove the 3 screws, then slide the
panel downward and pull it toward you.)

(1)

If the routing direction is through the front, rear, or right,
use a nipper or similar tool to cut out the knockout holes for
the inter-unit control wiring outlet, power wiring outlet, and
tubing outlet from the appropriate covers A and B.

(2)

If the routing direction is down, use a nipper or similar tool to
cut out the lower flange from cover A.

CAUTION

Route the tubing so that it does
not contact the compressor,
panel, or other parts inside the
unit. Increased noise will result if
the tubing contacts these parts.

When routing the tubing, use a
tube bender to bend the tubes.

Drain port

Fig. 2-13

Inter-unit control wiring

Inspection panel

Cover A

Front

Power supply

Fig. 2-14

2

Anchor bolt
(M10 or 3/8")

3

Unit: in.

4

Rear

5

Cover B

Right

6

Down

Tubing outlet

7

2 - 37

8

5. HOW TO PROCESS TUBING

Design of Mini VRF SYSTEM

1

5. HOW TO PROCESS TUBING

5-1. Connecting the Refrigerant Tubing

Use of the Flaring Method

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

Flaring Procedure with a Flare Tool

(1)

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

(2)

Remove burrs at the end of the copper tube with a
tube reamer or file. This process is important and
should be done carefully to make a good flare.
(Fig. 2-15)

NOTE

Before

Deburring

After

Fig. 2-15

Copper
tubing

Reamer

2

3

4

5

6

When reaming, hold the tube end downward and be
sure that no copper scraps fall into the tube.(Fig.2-16)

(3)

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

(4)

Make a flare at the end of copper tube with a flare
tool. (Fig.2-17)

NOTE

A good flare should have the following characteristics:

inside surface is glossy and smooth

edge is smooth

tapered sides are of uniform length

Fig. 2-16

Flare nut

Copper
tubing

Flare tool

Fig. 2-17

7

8

2 - 38

5. HOW TO PROCESS TUBING

Caution Before Connecting Tubes Tightly

(1)

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

(2)

Be sure to apply refrigerant lubricant to the matching
surfaces of the flare and union before connecting them
together. This is effective for reducing gas leaks. (Fig.2-18)

(3)

For proper connection, align the union tube and flare tube
straight with each other, then screw in the flare nut lightly
at first to obtain a smooth match.(Fig.2-19)
Adjust the shape of the liquid tube using a tube bender at
the installation site and connect it to the liquid tubing side
valve using a flare.

Design of Mini VRF SYSTEM

Apply refrigerant
lubricant

Fig. 2-18

Union

Flare nut

Cautions During Brazing

Replace air inside the tube with nitrogen gas to
prevent copper oxide film from forming during the
brazing process. (Oxygen, carbon dioxide and Freon
are not acceptable.)

Do not allow the tubing to get too hot during brazing.
The nitrogen gas inside the tubing may overheat,
causing refrigerant system valves to become dam­aged. Therefore allow the tubing to cool when brazing.

Use a reducing valve for the nitrogen cylinder.

Do not use agents intended to prevent the
formation of oxide film. These agents adversely
affect the refrigerant and refrigerant oil, and may
cause damage or malfunctions.

5-2. Connecting Tubing Between Indoor and Outdoor

Units

(1)

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

(2)

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

When removing the flare nuts from the tubing
connections, or when tightening them after connecting
the tubing, be sure to use 2 adjustable wrenches or
spanners as shown. (Fig. 2-20)
If the flare nuts are over-tightened, the flare may be
damaged, which could result refrigerant leakage and
cause in injury or asphyxiation to room occupants.

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

Fig. 2-19

Torque wrench

Indoor unit

Outdoor unit

Fig. 2-20

Tube diameter

ø1/4"
(ø6.35 mm)

ø3/8"
(ø9.52 mm)

ø1/2"
(ø12.7 mm)

ø5/8"
(ø15.88 mm)

ø3/4"
(ø19.05 mm)

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

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

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

Tightening torque,
approximate

120 – 160 lbs

(140 – 180 kgf

300 – 360 lbs

(340 – 420 kgf

430 – 480 lbs

(490 – 550 kgf

590 – 710 lbs

(680 – 820 kgf

870 – 1040 lbs

(1000 – 1200 kgf

in.

·

cm)

·

in.

·

cm)

·

in.

·

cm)

·

in.

·

cm)

·

·

in.

·

cm)

Spanner

Tube thickness

1/32"
(0.8 mm)

1/32"
(0.8 mm)

1/32"
(0.8 mm)

5/128"
(1.0 mm)

over 5/128"
(1.0 mm)

1

2

3

4

5

6

7

8

2 - 39

5. HOW TO PROCESS TUBING

5-3. Insulating the Refrigerant Tubing

Tubing Insulation

Design of Mini VRF SYSTEM

1

2

3

Thermal insulation must be applied to all unit tubing,
including distribution joint (purchased separately).

* For gas tubing, the insulation material must be heat

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

be heat resistant to 176°F or above.
Insulation material thickness must be 25/64" or greater.
If the conditions inside the ceiling exceed DB 86°F and
RH 70%, increase the thickness of the gas tubing
insulation material by 1 step.

Taping the flare nuts

CAUTION

Wind the white insulation tape around the flare nuts at the
gas tube connections. Then cover up the tubing
connections with the flare insulator, and fill the gap at the
union with the supplied black insulation tape. Finally,
fasten the insulator at both ends with the supplied vinyl
clamps. (Fig.2-22)

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

Sealer (supplied)

Unit side
insulator

Flare nut

Two tubes arranged together

Liquid tubing

Insulation

Insulation tape (white)

(supplied)

Vinyl clamps (supplied)

Gas tubing

Fig. 2-21

Flare insulator (supplied)

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

4

5

6

7

8

Fig. 2-22

2 - 40

5. HOW TO PROCESS TUBING

5-4. Taping the Tubes

(1)

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

(2)

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

(3)

Clamp the tubing bundle to the wall, using 1 clamp
approx. each ft. (Fig.2-23)

NOTE

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

5-5. Finishing the Installation

Design of Mini VRF SYSTEM

Apply putty here

Insulated tubes

Fig. 2-23

Clamp

Drain hose

1

After finishing insulating and taping over the tubing, use
sealing putty to seal off the hole in the wall to prevent
rain and draft from entering. (Fig.2-24)

2

Tubing

3

Fig. 2-24

4

5

6

7

2 - 41

8

6. AIR PURGING

Design of Mini VRF SYSTEM

1

2

6. AIR PURGING

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

pressure in the system rises
operating current rises
cooling (or heating) efficiency drops
moisture in the refrigerant circuit may freeze and block

capillary tubing
water may lead to corrosion of parts in the refrigerant

system

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

Air Purging with a Vacuum Pump (for Test Run)

Preparation

Check that each tube (both liquid and gas tubes) between
the indoor and outdoor units has been properly connected
and all wiring for the test run has been completed. Remove
the valve caps from both the gas tube and liquid tube
service valves on the outdoor unit. Note that both liquid and
gas tube service valves on the outdoor unit are kept closed
at this stage.

Pressure
gauge

Manifold gauge

Fig.2-25

Vacuum pump

Outlet
Inlet

Fig.2-26

Manifold valve

Lo Hi

3

4

5

6

7

8

Leak test

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

nitrogen gas cylinder to this service port with charge
hoses.

CAUTION

(2) Pressurize the system to no more than

512 psig (36 kgf/cm
the cylinder valve when the gauge reading reaches
512 psig (36 kgf/cm2G). Then, test for leaks with liquid
soap.

CAUTION

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

2

G) with dry nitrogen gas and close

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

2 - 42

Gas
tube

Liquid
tube

Cylinder
valve

Open

Open

Fig.2-27

Charge hose

Nitrogen gas cylinder
(In vertical standing
position)

Service port ø5/16"

Close

Close

Outdoor unit

6. AIR PURGING

(3)

Do a leak test of all joints of the tubing (both indoor and

outdoor) and both gas tube and liquid tube service

valves. Bubbles indicate a leak. Wipe off the soap with a

clean cloth after the leak test.

(4)

After the system is found to be free of leaks, relieve the

nitrogen pressure by loosening the charge hose

connector at the nitrogen cylinder. When the system

pressure is reduced to normal, disconnect the hose from

the cylinder.

Evacuation

(1) Attach the charge hose end described in the preceding

steps to the vacuum pump to evacuate the tubing and

indoor unit. Confirm that the “Lo” knob of the manifold

valve is open. Then, run the vacuum pump. The

operation time for evacuation varies with the tubing

length and capacity of the pump. The following table

shows the amount of time for evacuation:

Pressure
gauge

Design of Mini VRF SYSTEM

Manifold valve

Lo Hi

Vacuum pump

Service port ø5/16"

Required time for evacuation

when 30 gal/h vacuum pump is used

If tubing length is

less than 49 ft.

45 min. or more 90 min. or more

NOTE

The required time in the above table is calculated based on
the assumption that the ideal (or target) vacuum condition is
less than –14.7 psig (–755 mmHg, 5 Torr).

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

knob of the manifold valve and turn off the vacuum pump.

Confirm that the gauge pressure is under –14.7 psig

(–755 mmHg, 5 Torr) after 4 to 5 minutes of vacuum

pump operation.

If tubing length is

longer than 49 ft.

Gas
tube

Liquid
tube

Open

Open

Fig. 2-28

Close

Close

Outdoor unit

1

2

3

4

5

6

2 - 43

7

8

6. AIR PURGING

Design of Mini VRF SYSTEM

1

2

3

4

5

6

7

CAUTION

Charging additional refrigerant

Charging additional refrigerant (calculated from the
liquid tube length as shown in Section 2-7
“Additional Refrigerant Charge”) using the liquid
tube service valve. (Fig. 2-29)

Use a balance to measure the refrigerant accurately.

If the additional refrigerant charge amount cannot
be charged at once, charge the remaining
refrigerant in liquid form by using the gas tube
service valve with the system in cooling operation
mode at the time of test run. (Fig. 2-30)

Finishing the job

(1)

With a hex wrench, turn the liquid tube service

valve stem counter-clockwise to fully open the

valve.

(2)

Turn the gas tube service valve stem

counter-clockwise to fully open the valve.

CAUTION

Loosen the charge hose connected to the gas

(3)

tube service port (for ø5/16" tube) slightly to

release the pressure, then remove the hose.

Replace the service port cap on the gas tube

(4)

service port and fasten the cap securely with an

adjustable wrench or box wrench. This process is

very important to prevent gas from leaking from

the system.

Replace the valve caps at both gas tube and liquid

(5)

tube service valves and fasten them securely.

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

Use a cylinder designed for
use with R410A.

To avoid gas from leaking when
removing the charge hose,
make sure the stem of the gas
tube is turned all the way out
(“BACK SEAT” position).

Pressure
gauge

Gas
tube

Liquid
tube

Gas
tube

Liquid
tube

Manifold valve

Lo Hi

Close

Open

Fig. 2-29

Open

Close

Close

Close

Open

Open

Valve

Liquid

R410A

Outdoor unit

Outdoor unit

8

Fig. 2-30

2 - 44

7. Optional Parts

.

7-1. Distribution Joint Kits

Design of Mini VRF SYSTEM

CZ-P160BK1U (for R410A)

How to Attach Distribution Joint

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

2. Distribution Joint Kits (with insulation)

4-21/64

3-13/16

A

Distribution

Joint

Insulation Insulation

B

C

B

B

C

2-53/64

D

Distribution

Joint

A

unit : inch unit : inch

Parts Kit 2Parts Kit 1

4-21/64

C

C

3-13/16

C

D
E

ED

2-53/64

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

Size mm Inch

Part A

Part B

Part C

Part D

Part E

Straight tubing 5-15/16" or larger

o19.05

o15.88

o12.7

o9.52

o6.35

3. Making Branch Connections
For branching tubes, install 5-15/16" or larger (including reducer)
straight tubing up to the point where the tube branches

Stopper(boss)

Cutting point

(or after the point where the tubes join together). (Fig. 2-31)
Using a tube cutter, cut the joints at the diameter required to match
the outside diameter of the tubing you are connecting.
(This is usually done at the installation site.)
The tube diameter depends on the total capacity of the indoor unit.
Note that you do not have to cut the joints if it already matches the
tubing end size. For size selection of the tube diameter, refer to the

Make space as long as possible
Insertion length of the

connecting tube

installation instructions provided with the outdoor unit.

NOTE

Avoid forceful cutting that may harm the shape of the joints or tubing.

Outdoor unit
Side

(Inserting the tubing will not be possible if the tube shape is not proper.)

15 to 30

Cut off as far away from stopper as possible. (Fig. 2-32)

After cutting the joints, be sure to remove burrs on the inside of the

In case of horizontal position

upward slant

joints. (If the joints have been squashed or dented badly, reshaped
them using a tube spreader.)

Make sure there is no dirt or other foreign substances inside the
distribution joint.

The distribution joint can be either horizontal or vertical. (Fig. 2-33)
In the case of horizontal, the L-shaped tubing must be slanted slightly
upward (15 to 30 ).

When brazing a pipe E to the reducer of which middle pipe inner
dimension is D as shown above chart, cut the middle pipe as long as

In case of vertical position

(directed upward)

possible so that the pipe E can be inserted.

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

To insulate the distribution joint, use the supplied tubing insulation. (If using insulation other than that supplied,
make sure that its heat resistance is 248 F or higher.)

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

3/4

5/8

1/2

3/8

1/4

Fig. 2-31

1

2

Fig. 2-32

3

Indoor unit

Side

4

5

6

7

Fig. 2-33

8

2 - 45

– MEMO –

2 - 46

Contents

3. CONTROL OF MINI VRF SYSTEM

1. Main Operating Functions

2. Wireless Remote Controller

3. Timer Remote Controller

4. Simplifi ed Remote Controller

5. System Controller

6. Schedule Timer

7. Intelligent Controller (CZ-256ESMC1U)

8. Communication Adaptor (CZ-CFUNC1U)

9. Remote Sensor

10. LonWorks Interface (CZ-CLNC1U)

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

Control of Mini VRF SYSTEM

1

2

3

4

5

6

3 - 1

7

8

– MEMO –

3 - 2

Mini VRF SYSTEM

Contents

Unit Specifications

4. MINI VRF SYSTEM UNIT SPECIFICATIONS

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

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

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

1-3. Dimensional Data ...................................................................................................... 4-5

1-4. Refrigerant Flow Diagram ............................................................................................

1-5. Sound Data .................................................................................................................

2.

4-Way Cassette Type (U1 Type)

3.

4-Way Cassette 60×60 Type (Y1 Type)

4.

1-Way Cassette Type (D1 Type)

5.

Low Silhouette Ducted Type (F1 Type)

6.

Slim Low Static Ducted Type (M1 Type)

7.

High Static Pressure Ducted Type (E1 Type)

8.

Ceiling Type (T1 Type)

9.

Wall Mounted Type (K1 Type)

10.

Floor Standing Type (P1 Type)

11.

Concealed Floor Standing Type (R1 Type)

12.

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

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

*

4-6
4-7

1

2

3

4

5

6

7

4 - 1

8

1

2

3

4

5

6

7

8

Mini VRF SYSTEM

1. Outdoor Unit

1-1. Specifi cations

Unit specifi cations (A)

MODEL No.

POWER SOURCE

PERFORMANCE

Capacity

Air circulation (Hi) CFM 3,530

ELECTRICAL RATINGS

Voltage rating V 208 230 208 230

Available voltage range V 187 - 253 187 - 253

Running amperes A 14.6 13.6 14.6 13.6

Max. running amperes * A 23.6 23.6

Power input kW 2.76 2.76 2.88 2.88

Max. power input kW 4.85 4.85

Power factor % 91 88 95 92

Max. starting amperes A Approx. 1 Approx. 1 Approx. 1 Approx. 1

FEATURES

Controls Microprocessor

Defrost control Reverse cycle, microprocessor control

Service function

Refrigerant amount at shipment lbs. (kg) R410A - 7.7 (3.5)

Refrigerant control Electronic expansion valve

Operation sound (Hi)

External finish Galvanized steel plate with powder paint

Color (Approximate value) Munsell code 1Y 8.5 /0.5

Power level

Pressure level 51

Refrigerant tubing

Limit of tubing length ft. (m) 492 (150)

Limit of elevation difference

betweenthe2units

Refrigerant tube
diameter

Refrigerant tubing kit / Joint kit Optional

Liquid tube in. (mm) 3/8 (9.52)

Gas tube in. (mm) 5/8 (15.88)

DIMENSIONS & WEIGHT

Height in. (mm) 48-7/16 (1230)

Unit dimensions

Net weight lbs. (kg) 229 (104)

Shipping weight lbs. (kg) 247 (112)

Shipping volume ft

Rated conditions

Cooling : Indoor air temperature 80°F DB / 67°F WB ; Outdoor air temperature 95°F DB
Heating : Indoor air temperature 70°F DB ; Outdoor air temperature 47°F DB / 43°F WB

* Full-load conditions at Indoor / Outdoor capacity ratio 100%

Cooling : Indoor air temperature 89°F DB / 73°F WB ; Outdoor air temperature 109°F DB / 78°F WB

1

Outdoor unit model name ended with letter “E”

*

Refer to the Section 1 “2. Salt-Air Damage Resistant Specifi cations”.

Width in. (mm) 37 (940)

Depth in. (mm) 13-13/32 (340)

Outdoor Unit U-36LE1U6, U-36LE1U6E*

208 - 230 V / 1ø / 60 Hz

Cooling Heating

BTU / h 38,200 42,700

kW 11.2 12.5

Sensor temp. recall function

Past service warnings recall function

dB-A

ft. (m)

3 (m3

) 19.8 (0.56)

4 - 2

Outdoor unit is higher than indoor unit : 164 (50)

Outdoor unit is lower than indoor unit : 131 (40)

Unit dimensions

DATA SUBJECT TO CHANGE WITHOUT NOTICE

67

Unit Specifications

1

––

––

Package dimensions

52-13/32 (1331)

40 (1016)

16-11/32 (415)

Mini VRF SYSTEM

1. Outdoor Unit

Unit specifi cations (B)

MODEL No.

POWER SOURCE

PERFORMANCE

Capacity

Air circulation (Hi) CFM 3,530

ELECTRICAL RATINGS

Voltage rating V 208 230 208 230

Available voltage range V 187 - 253 187 - 253

Running amperes A 23.5 21.9 23.5 21.9

Max. running amperes * A 28.0 28.0

Power input kW 4.57 4.57 4.58 4.58

Max. power input kW 5.72 5.72

Power factor % 93 91 94 91

Max. starting amperes A Approx. 1 Approx. 1 Approx. 1 Approx. 1

FEATURES

Controls Microprocessor

Defrost control Reverse cycle, microprocessor control

Service function

Refrigerant amount at shipment lbs. (kg) R410A - 7.7 (3.5)

Refrigerant control Electronic expansion valve

Operation sound (Hi)

External finish Galvanized steel plate with powder paint

Color (Approximate value) Munsell code 1Y 8.5 /0.5

Power level

Pressure level 52

Refrigerant tubing

Limit of tubing length ft. (m) 492 (150)

Limit of elevation difference

betweenthe2units

Refrigerant tube
diameter

Refrigerant tubing kit / Joint kit Optional

Liquid tube in. (mm) 3/8 (9.52)

Gas tube in. (mm) 3/4 (19.05)

DIMENSIONS & WEIGHT

Height in. (mm) 48-7/16 (1230)

Unit dimensions

Net weight lbs. (kg) 229 (104)

Shipping weight lbs. (kg) 247 (112)

Shipping volume ft

Rated conditions

Cooling : Indoor air temperature 80°F DB / 67°F WB ; Outdoor air temperature 95°F DB
Heating : Indoor air temperature 70°F DB ; Outdoor air temperature 47°F DB / 43°F WB

* Full-load conditions at Indoor / Outdoor capacity ratio 100%

Cooling : Indoor air temperature 89°F DB / 73°F WB ; Outdoor air temperature 109°F DB / 78°F WB

1

Outdoor unit model name ended with letter “E”

*

Refer to the Section 1 “2. Salt-Air Damage Resistant Specifi cations”.

Width in. (mm) 37 (940)

Depth in. (mm) 13-13/32 (340)

Outdoor Unit U-52LE1U6, U-52LE1U6E*

208 - 230 V / 1ø / 60 Hz

Cooling Heating

BTU / h 52,900 60,000

kW 15.5 17.6

Sensor temp. recall function

Past service warnings recall function

dB-A

ft. (m)

3 (m3

) 19.8 (0.56)

4 - 3

Outdoor unit is higher than indoor unit : 164 (50)

Outdoor unit is lower than indoor unit : 131 (40)

Unit dimensions

DATA SUBJECT TO CHANGE WITHOUT NOTICE

68

Unit Specifications

1

––

––

Package dimensions

52-13/32 (1331)

40 (1016)

16-11/32 (415)

1

2

3

4

5

6

7

8

1. Outdoor Unit

1-2. AHRI Registration Values

Mini VRF SYSTEM

Unit Specifications

1

2

Outdoor Unit

Models

U-36LE1U6(E)

U-52LE1U6(E)

Indoor Unit

Types

Ducted

Non Ducted

Mixed Non-Ducted and Duced

Ducted

Non Ducted

Mixed Non-Ducted and Duced

Cooling

Capacity

BTU/h 95°F

37,000

39,000

38,000

51,500

52,000

51,750

EER SEER HSPF

9.60

11.50

10.55

9.40

10.20

9.80

13.1

17.0

15.05

14.6

17.4

16.0

Heating

Capacity

BTU/h

38,500

43,000

40,750

57,500

58,500

58,000

7.8

9.8

8.8

7.7

9.6

8.65

3

4

5

6

7

8

4 - 4

1. Outdoor Unit

Mini VRF SYSTEM

Unit Specifications

1-3. Dimensional Data

U-36LE1U6, U-36LE1U6E
U-52LE1U6, U-52LE1U6E

2 x ø32 or ø1/4'' holes (holes for drain)

Of the 4 ø32 or ø1/4'' holes, use 1 of the 2 holes specified

for drain use to install the drain port.

Use rubber plugs to seal the remaining 3 holes.

10-25/32

11-11/32

2-7/32

4-19/32

R1-3/16

13/32

25/32

2-3/8

5/16

15-15/16

14-31/32

R3/4

2-7/16

19/32

13/32

7

6

8

7

4

5-29/32

2-1/4

3-7/16

1-13/16

5

7-25/32

5

8

3-29/32

25/32

4

5-9/16

23-5/8

22-9/16

6-13/16

7

4

7

7

7

Air

Air

3

2

6

intake

discharge

3-3/16

9

7-8/32

8-9/32

6-5/8

4-3/4

2-27/32

2-3/8

1-13/32

7-3/4

6-9/16

5-1/2

6-11/16

8-15/16

For R410A only

5-1/8

4-11/32

4-23/32

2-25/32

1

2

4-5/16

25-31/32

Air intake

1/2 1/2

8-5/8 5-29/32

2-

3/4

6-11/16

Installation anchoring hole (4-R6.5 or R1/4"), anchor bolt: M10 or 13/32''

Refrigerant tubing (liquid tube), flared connection ø3/8'' (ø9.52)

Refrigerant tubing (gas tube), flared connection ø5/8'' (ø15.88)

Refrigerant tubing port

Electrical wiring port ø1-3/8'' (ø35)

Electrical wiring port ø1-7/64'' (ø28)

Electrical wiring port ø55/64'' (ø22)

Electrical wiring port ø33/64'' (ø13)

Auxiliary connection tube ø5/8'' to ø3/4'' (ø15.88 to ø19.05) 6 hp only

7

8

1

2

3

4

6

5

9

11-21/32

13-3/8

4 - 5

1/21/2

37

Air

discharge

1

48-7/16

23/32

8

5

2-3/8

6

Unit: inch

3

4

5

6

7

8

1. Outdoor Unit

1-4. Refrigerant Flow Diagram

U-36LE1U6
U-36LE1U6E
U-52LE1U6
U-52LE1U6E

Mini VRF SYSTEM

Unit Specifications

Suction

1

2

3

4

5

6

7

8

4 - 6

1. Outdoor Unit

1-5. Sound Data

(1) Sound Power Level

U-36LE1U6, U-36LE1U6E

Mini VRF SYSTEM

Unit Specifications

Model

Sound Power
Level

Condition

90

80

70

60

50

Sound Power Level (dB)

U-36LE1U6, U-36LE1U6E

67 dB (A)
Cooling

NC – 70

NC – 60

NC – 50

1

2

3

40

30

20

10

NOTE

1. dBA = A – weighted sound power level (A – scale according to IEC)

2. Reference acoustic intensity 0 dB = 10

63 125 250 500 1000 2000 4000 8000

Frequency at center of sound pressure band (Hz)

–13

4 - 7

W/ft

2

NC – 40

NC – 30

NC – 20

4

5

6

7

8

1. Outdoor Unit

U-52LE1U6, U-52LE1U6E

Mini VRF SYSTEM

Unit Specifications

1

2

Model

Sound Power
Level

Condition

90

80

70

60

50

Sound Power Level (dB)

U-52LE1U6, U-52LE1U6E

68 dB (A)
Cooling

NC – 70

NC – 60

NC – 50

3

4

5

6

7

8

40

30

20

10

NOTE

1. dBA = A – weighted sound power level (A – scale according to IEC)

2. Reference acoustic intensity 0 dB =10

63 125 250 500 1000 2000 4000 8000

Frequency at center of sound pressure band (Hz)

–13

W/ft

2

NC – 40

NC – 30

NC – 20

4 - 8

1. Outdoor Unit

(2) Sound Pressure Level

U-36LE1U6, U-36LE1U6E

Mini VRF SYSTEM

Unit Specifications

90

80

70

60

Model

Sound Pressure Level
Cooling

Condition

U-36LE1U6, U-36LE1U6E

Front 51 dB (A)
Quiet Mode 48 dB (A)

3.3 ft. in front at height of 4.9 ft.

NC – 70

NC – 60

Front

Quiet Mode

1

2

3

50

Octave Band Level (dB)*

40

30

Approximate
minimum audible

20

limit for continuous
noise

10

Overall

* 0 dB = 0.0002 µbar

63

NC – 50

NC – 40

NC – 30

NC – 20

125 250 500 1000 2000 4000 8000

Frequency at center of sound pressure band (Hz)

4 - 9

4

5

6

7

8

1. Outdoor Unit

U-52LE1U6, U-52LE1U6E

Mini VRF SYSTEM

Unit Specifications

1

2

90

80

70

60

Model

Sound Pressure Level
Cooling

Condition

U-52LE1U6, U-52LE1U6E

Front 52 dB (A)
Quiet Mode 49 dB (A)

3.3 ft. in front at height of 4.9 ft.

Front

Quiet Mode

NC – 70

NC – 60

3

4

5

6

7

8

50

Octave Band Level (dB)*

40

30

Approximate
minimum audible

20

limit for continuous
noise

10

Overall

* 0 dB = 0.0002 µbar

63 125 250 500 1000 2000 4000 8000

NC – 50

NC – 40

NC – 30

NC – 20

Frequency at center of sound pressure band (Hz)

4 - 10

Test Run

Contents

5. TEST RUN

1. Preparing for Test Run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 -2

2. Test Run Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 -3

3. Outdoor Unit PCB Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

4. Auto Address Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

5. Remote Controller Test Run Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

6. Caution for Pump Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13

7. Meaning of Alarm Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13

1

2

3

4

5

6

5 - 1

7

8

1

2

3

1. Preparing for Test Run

●

Before attempting to start the air conditioner,
check the following.

(1) All loose matter is removed from the cabinet,

especially steel filings, bits of wire, and clips.

(2) The control wiring is correctly connected and all

electrical connections are tight.

(3) The transportation pads for the indoor fan have

been removed. If not, remove them now.

(4) The power has been connected to the unit for at

least 5 hours before starting the compressor. The
bottom of the compressor should be warm to the
touch and the crankcase heater around the feet of
the compressor should be hot to the touch.
(Fig. 5-1)

(5) Both the gas and liquid tube service valves are

open. If not, open them now. (Fig. 5-2)

(6) Request that the customer be present for the trial

run.
Explain the contents of the instruction manual,
then have the customer actually operate the
system.

(7) Be sure to give the instruction manual and

warranty certificate to the customer.

(8) When replacing the control PCB, be sure to make

all the same settings on the new PCB as were in
use before replacement.
The existing EEPROM is not changed, and is
connected to the new control PCB.

Test Run

ON

(Power must be turned ON
at least 5 hours before
attempting test run)

Power mains switch

Fig. 5-1

4

5

6

7

8

Liquid tube service cap

5 - 2

Gas tube service cap

Fig. 5-2

2. Test Run Procedure

Recheck the items to check before the test run.

<Outdoor unit control PCB>

Unit No. setting switch

(S004)

Set the No. of indoor units.

Test Run

Items to Check Before the Test Run

1.

Turn the remote power switch on at least 5 hours before
the test, in order to energize the crankcase heater.

2. Turn the outdoor service valves
(2 locations) to the full-open positions.

●

Use caution when making the settings. If there are

duplicated system addresses, or if the settings for
the Nos. of the indoor units are not consistent, an
alarm will occur and the system will not start.

●

These settings are not made on the indoor unit PCB.

(Check the link wiring.)

<Outdoor unit control PCB>

Unit No. setting switch

(S002 and S003)

Refer to Fig. 5-4

When multiple outdoor units exist, disconnect the

(CN33) at all outdoor unit PCBs except for 1.ޓ

Alternatively, move the sockets to the OPEN side.

NO

CASE 3B CASE 3A

Is it OK to start the

compressors?

Turn ON the indoor and

outdoor unit power.

*2

Short-circuit the mode change pin

(CN50) on the outdoor unit PCB.

At the same time, short-circuit the

automatic address pin (CN51) for 1

second or longer, then pull it out.

*3 *3

Start indoor and outdoor unit

cooling operation.

LED 1 and 2 blink alternately.

Are LEDs 1 and 2 on the

outdoor unit PCB OFF?

Are the inter-unit control

wires connected to more than 1

refrigerant system?

YES

Set the system address.

terminals extended from the shorted plugs

ON the power only for the 1 refrigerant

Is it possible to turn

system where the test run will

be performed?

NO

Will automatic address setting be

performed in Heating mode?

YES

Is it OK to start the

compressors?

Turn ON the indoor and

outdoor unit power.

*2

Short-circuit the automatic

address pin (CN51) on the

outdoor unit PCB for 1
second or longer, then

release it.

Start indoor and outdoor unit

heating operation. LED 1

and 2 blink alternately.

Make necessary

corrections

Turn OFF the indoor
and outdoor unit

Check the alarm

contents.

NO

CASE 1

NO

CASE 2

YES

Turn ON the indoor and outdoor unit
power for that refrigerant system only.

Make necessary

corrections.

Turn OFF the indoor and

outdoor unit power.

Check the alarm contents.

Refer to “Table of
Self-Diagnostic Functions and
Description of Alarm Displays.”

*2 A minimum of 5 hours must have passed

after the power was turned ON to the
outdoor unit.

*3 All indoor units operate in all refrigerant

systems where the power is ON.

Short-circuit the automatic address
pin (CN51) on the outdoor unit PCB
for 1 second or longer, then release it.

LED 1 and 2 blink alternately

NO

Are LEDs 1 and 2 on the

(about 2 or 3 minutes).

outdoor unit PCB OFF?

YES

1

2

3

4

5

6

(Do not allow the short-circuited pins to remain short-circuited.)

Set the wired remote controller for test run.

Refer to the remote
controller test-run
settings.

Return remote control to normal mode

YES

Check that test run preparation is OK.

Does system

operate?

NO

Check and make corrections according to

YES

End test run.

“Table of Self Diagnostic Functions.”

5 - 3

7

8

Fig. 5-3

3. Outdoor Unit PCB Setting

Test Run

1

2

3

4

5

6

CN33

S003

S002

S004

CN51

CN50

D043
(LED2)

D042
(LED1)

7

8

Fig. 5-4

5 - 4

3. Outdoor Unit PCB Setting

Examples of the No. of indoor units settings

Test Run

No. of indoor units

1 unit (factory setting)

2 units

9 units

Indoor unit setting (S004)

(Rotary switch, red)

1

Set to 1

2

Set to 2

9

Set to 9

Examples of refrigerant circuit (R.C.) address settings (required when link wiring is used)

System address No.

System 1 (factory setting)

System 11

System 21

System 30

System address (S003)

(2P DIP switch, blue)

Both OFF

1 ON

2 ON

1 & 2 ON

10 20

ON

ON

ON

ON

ON

2

OFF

1

ON

2

1

OFF

ON

2

OFF

1

ON

2

1

OFF

System address (S002)

(Rotary switch, black)

1

Set to 1

1

Set to 1

1

Set to 1

0

Set to 0

1

2

3

4

5

6

7

8

5 - 5

4. Auto Address Setting

Basic wiring diagram: Example (1)

• If link wiring is not used

(The inter-unit control wires are not connected to multiple refrigerant systems.)

Indoor unit addresses can be set without operating the compressors.

No. 1 unit settings

Test Run

1

2

3

System address

(system 1 setting)

(S003) (S002)
ON

ON

1

2

1

OFF

Outdoor Unit

Indoor Unit

Remote controller

(S004)

No. of indoor units

(8 units setting)

(S004)

Unit

No. 1

1-1

8

Inter-unit control wiring

1-2 1-3

1-8

Remote control
communication wiring

Fig. 5-5

(1) Automatic Address Setting from the Outdoor Unit

1. On the outdoor unit control PCB, check that the system address rotary switch (S002) is set to “1” and that the
DIP switch (S003) is set to “0.”

ON

ON

(These are the settings at the time of factory shipment.)

1

2

OFF

4

5

6

7

8

2. To set the number of indoor units that are connected to the outdoor unit to 8 on the outdoor unit control PCB, set
the No. of indoor units rotary switch (S004) to “8.”

3. Turn ON the power to the indoor and outdoor units.

4. On the outdoor unit control PCB, short-circuit the automatic address pin (CN51) for 1 second or longer, then
release it.

↓

(Communication for automatic address setting begins.)

↓

* To cancel, again short-circuit the automatic address pin (CN51) for 1 second or longer, then pull it out.

The LED that indicates that automatic address setting is in progress turns OFF and the process is
stopped.

(Automatic address setting is completed when LEDs 1 and 2 on the outdoor unit control PCB turn OFF.)

↓

5. Operation from the remote controllers is now possible.

* To perform automatic address setting from the remote controller, perform steps 1 to 3, then use the remote controller and

complete automatic address setting.
Refer to “Automatic Address Setting from the Remote Controller.”

5 - 6

4. Auto Address Setting

Basic wiring diagram: Example (2)

Test Run

System address

(system 1 setting)

(S003)

ON

1

2

(S002)

ON

OFF

Outdoor unit

system 1

Indoor unit

• If link wiring is used• If link wiring is used

No. 1 unit settings

No. of indoor units
(6 units setting)

1

Unit

No. 1

1-1 1-2

Remote

controller

No. 2 unit settings

* When multiple outdoor units exist, remove the socket that

is used to short-circuit the terminal plug (CN33) from all
outdoor unit PCBs except for 1.
Alternatively, move the sockets to the “OPEN” side.

(S004)

6

Leave the socket
that is used to
short-circuit the
terminal plug.
(CN33)

Inter-unit control wiring

1

1-3 1-6

Remote control
communication wiring

2

System address

(system 2 setting)

(S003)(S002)

ON

2

1

2

Outdoor unit

system 2

To other system
link wiring

• Indoor and outdoor unit power can be turned ON for each system separately.

• Indoor and outdoor unit power cannot be turned ON for each system separately.

Automatic address setting in Heating mode

Automatic address setting in Cooling mode

Indoor unit

Make settings as appropriate for the cases listed below.

No. of indoor units

7

(7 units setting)

ON

OFF

(S004)

Unit

No. 1

7

Leave the socket
that is used to open
circuit the terminal
plug (CN33).

Inter-unit control wiring

2-1 2-2 2-7

Remote

controller

(Refer to the instructions on the following pages.)

Remote control
communication

wiring

Case 1

Case 2

Case 3

3

4

5

6

7

8

Fig. 5-6

5 - 7

4. Auto Address Setting

Test Run

1

2

Case 1

●

Indoor and outdoor unit power can be turned ON for each system separately.

Indoor unit addresses can be set without operating the compressors.

Automatic Address Setting from Outdoor Unit

1. On the outdoor unit control PCB, check that the system address rotary switch (S002) is set to “1” and that the

2. To set the number of indoor units that are connected to the outdoor unit to 6 on the outdoor unit control PCB, set

3. At the outdoor unit where all indoor and outdoor unit power has been turned ON, short-circuit the automatic

(Communication for automatic address setting begins.)

(Automatic address setting is completed when LEDs 1 and 2 on the outdoor unit control PCB turn OFF.)

4. Next turn the power ON only for the indoor and outdoor units of the next (different) system. Repeat steps 1 – 3

5. Operation from the remote controllers is now possible.

Automatic Address Setting (no compressor operation)

DIP switch (S003) is set to “0.”

the No. of indoor units rotary switch (S004) to “6.”

address pin (CN51) for 1 second or longer, then pull it out.

↓

↓

↓

in the same way to complete automatic address settings for all systems.

↓

* To cancel, again short-circuit the automatic address pin (CN51) for 1 second or longer, then pull it out.

The LED that indicates automatic address setting is in progress turns OFF and the process is stopped.

ON

1

ON

(These are the settings at the time of factory shipment.)

2

OFF

3

4

5

6

7

* To perform automatic address setting from the remote controller, perform steps 1 and 2, then use the remote controller

complete automatic address setting.
Refer to “Automatic Address Setting from the Remote Controller.”

8

5 - 8

4. Auto Address Setting

Test Run

Case 2

●

Indoor and outdoor unit power cannot be turned ON for each system separately.

Automatic Address Setting from Outdoor Unit

1. Perform steps 1 and 2 in the same way as for

2. Turn the indoor and outdoor unit power ON at all systems.

3. To perform automatic address setting in

(Communication for automatic address setting begins, the compressors turn ON, and automatic address

(All indoor units operate.)

Automatic Address Setting in Heating Mode

In the following, automatic setting of indoor unit addresses is not possible if the compressors are not operating.
Therefore perform this process only after completing all refrigerant tubing work.

Case 1

↓

Heating mode

system where you wish to set the addresses, short-circuit the automatic address pin (CN51) for 1 second or
longer, then pull it out.
(Be sure to perform this process for one system at a time. Automatic address settings cannot be performed for
more than one system at the same time.)

↓

setting in heating mode begins.)

↓

* To cancel, again short-circuit the automatic address pin (CN51) for 1 second or longer, then pull it out.

The LED that indicates automatic address setting is in progress turns OFF and the process is stopped.

.

, on the outdoor unit control PCB in the refrigerant

1

(Automatic address setting is completed when the compressors stop and LEDs 1 and 2 on the outdoor unit

control PCB turn OFF.)

4. At the outdoor unit in the next (different) system, short-circuit the automatic address pin (CN51) for 1 second or
longer, then pull it out.

(Repeat the same steps to complete automatic address setting for all units.)

5. Operation from the remote controllers is now possible.

↓

↓

* To perform automatic address setting from the remote controller, perform steps 1 and 2, then use the remote controller

complete automatic address setting.
Refer to “Automatic Address Setting from the Remote Controller.”

2

3

4

5

6

5 - 9

7

8

4. Auto Address Setting

Test Run

1

Case 3

●

Indoor and outdoor unit power cannot be turned ON for each system separately.

Automatic Address Setting from Outdoor Unit

1. Perform steps 1 and 2 in the same way as for

2. Turn the indoor and outdoor unit power ON at all systems.

3. To perform automatic address setting in

(Communication for automatic address setting begins, the compressors turn ON, and automatic address

(All indoor units operate.)

Automatic Address Setting in Cooling Mode

In the following, automatic setting of indoor unit addresses is not possible if the compressors are not operating.
Therefore perform this process only after completing all refrigerant tubing work.
Automatic address setting can be performed during Cooling operation.

Case 1

↓

Cooling mode

system where you wish to set the addresses, short-circuit the mode change 2P pin (CN50). At the same time,
short-circuit the automatic address pin (CN51) for 1 second or longer, then pull it out. (Be sure to perform this
process for one system at a time. Automatic address settings cannot be performed for more than one system at
the same time.)

↓

setting in Cooling mode begins.)

↓

* To cancel, again short-circuit the automatic address pin (CN51) for 1 second or longer, then pull it out.

The LED that indicates automatic address setting is in progress turns OFF and the process is stopped.

.

, on the outdoor unit control PCB in the refrigerant

2

3

4

5

6

7

8

(Automatic address setting is completed when the compressors stop and LEDs 1 and 2 on the outdoor unit

control PCB turn OFF.)

4. At the outdoor unit in the next (different) system, short-circuit the automatic address pin (CN51) for 1 second or
longer, then pull it out.

(Repeat the same steps to complete automatic address setting for all units.)

5. Operation from the remote controllers is now possible.

* Automatic address setting in Cooling mode cannot be done from the remote controller.

Automatic Address Setting from the Remote Controller

Selecting each refrigerant system individually for automatic address setting

---Automatic address setting for each system: Item code “A1”

●

●

●

●

(Automatic address setting for one refrigerant system begins.)

●

↓

↓

Press the remote controller timer time button and button at the

same time. (Press and hold for 4 seconds or longer.)

Next, press either the temperature setting or button.

(Check that the item code is “A1.”)

Use either the or button to set the system No. to perform

automatic address setting.

Then press the button.

(When automatic address setting for one system is completed, the sys­tem returns to normal stopped status.) <Approximately 4 – 5 minutes is
required.>
(During automatic address setting, “
when automatic address setting is completed.)

Repeat the same steps to perform automatic address setting for each successive system.

” is displayed on the remote controller. This message disappears

5 - 10

Test Run

4. Auto Address Setting

Display during automatic address setting

●

On outdoor unit PCB

1

2

LED

Blink alternately

* When automatic address setting has been successfully completed, both LEDs 1 and 2 turn OFF.

* LED 1 is D042. LED 2 is D043.

* If automatic address setting is not completed successfully, refer to the table below and correct the problem. Then

perform automatic address setting again.

●

Display details of LEDs 1 and 2 on the outdoor unit control PCB

( : ON : Blinking : OFF)

LED 1 LED 2

* Do not short-circuit the automatic address setting pin (CN51) again while automatic

address setting is in progress. Doing so will cancel the setting operation and will cause
LEDs 1 and 2 to turn OFF.

:

Display meaning

After the power is turned ON (and automatic address setting is not in progress), no communication with the indoor
units in that system is possible.

After the power is turned ON (and automatic address setting is not in progress), 1 or more indoor units are
confirmed in that system; however, the number of indoor units does not match the number that was set.

Alternating

Simultaneous

Alternating

Note: indicates that the solenoid is fused or that there is a CT (current detection circuit) failure (current is detected when

the compressor is OFF).

●

Remote controller display during automatic setting

Automatic address setting is in progress.

Automatic address setting completed.

At time of automatic address setting, the number of indoor units did not match the number that was set.

(when indoor units are operating) indication appears on the display.

Refer to Table of Self-Diagnostic Functions and Description of Alarm Displays.

is blinking

1

2

3

4

5

6

5 - 11

7

8

1

2

3

4

4. Auto Address Setting

Test Run

5. Remote Controller Test Run Settings

Request concerning recording the indoor/outdoor unit combination Nos.

After automatic address setting has been completed, be sure to record them for future reference.

List the outdoor unit system address and the addresses of the indoor units in that system in an easily visible location
(next to the nameplate), using a permanent marking pen or similar means that cannot be erased easily.

Example: (Outdoor) 1 – (Indoor) 1-1, 1-2, 1-3… (Outdoor) 2 – (Indoor) 2-1, 2-2, 2-3…

These numbers are necessary for later maintenance. Please be sure to indicate them.

Checking the indoor unit addresses

Use the remote controller to check the indoor unit address.

<If 1 indoor unit is connected to 1 remote controller>

1. Press and hold the
longer (simple settings mode).

2. The address is displayed for the indoor unit that is connected to the
remote controller.
(Only the address of the indoor unit that is connected to the remote
controller can be checked.)

3. Press the
mode.

<If multiple indoor units are connected to 1 remote controller

(group control)>

1. Press and hold the
longer (simple settings mode).

2. “ALL” is displayed on the remote controller.

3. Next, press the

4. The address is displayed for 1 of the indoor units which is
connected to the remote controller. Check that the fan of that indoor
unit starts and that air is discharged.

5. Press the
indoor unit in sequence.

6. Press the
mode.

button again to return to normal remote controller

button again to return to normal remote controller

button and button for 4 seconds or

Number changes to indicate which indoor unit is
currently selected.

Indoor unit address

button and button for 4 seconds or

button.

button again and check the address of each

Number changes to indicate which indoor unit is
currently selected.

Indoor unit address

5

6

7

8

5. Remote Controller Test Run Settings

1. Press the remote controller

●

“TEST” appears on the LCD display while the test run is in progress.

●

The temperature cannot be adjusted when in Test Run mode.

(This mode places a heavy load on the machines. Therefore use it only when performing the test run.)

2. The test run can be performed using the HEAT, COOL, or FAN operation modes.

Note: The outdoor units will not operate for approximately 3 minutes after the power is turned ON and after

operation is stopped.

3. If correct operation is not possible, a code is displayed on the remote controller display.
(Refer to “2-6. Meaning of Alarm Messages” and correct the problem.)

4. After the test run is completed, press the
controller's display.
(To prevent continuous test runs, this remote controller includes a timer function that cancels the test run after
60 minutes.)

* If the test run is performed using the wired remote controller, operation is possible even if the cassette-type

ceiling panel has not been installed. (“P09” display does not occur.)

button for 4 seconds or longer. Then press the button.

button again. Check that “TEST” disappears from the remote

5 - 12

6. Caution for Pump Down

Test Run

7. Meaning of Alarm Messages

6. Caution for Pump Down

Pump down means refrigerant gas in the system
is returned to the outdoor unit. Pump down is used
when the unit is to be moved, or before servicing the
refrigerant circuit.

●

This outdoor unit cannot collect more than the rated refrigerant amount as shown

CAUTION

7. Meaning of Alarm Messages

Table of Self-Diagnostics Functions and Description of Alarm Displays

Alarm messages are indicated by the blinking of LED 1 and 2 (D042, D043) on the outdoor unit PCB. They are also displayed
on the wired remote controller.

Viewing the LED 1 and 2 (D042 and D043) alarm displays

●

by the nameplate on the back.

●

If the amount of refrigerant is more than that recommended, do not conduct pump

down. In this case use another refrigerant collecting system.

LED 1

Alternating

( : Blinking)

Possible cause of malfunction

Serial commu­nication errors
Mis-setting

LED 2

Alarm display
LED 1 blinks M times, then LED 2 blinks N times. The cycle then repeats.
M = 2: P alarm 3: H alarm 4: E alarm 5: F alarm 6: L alarm
N = Alarm No.
Example: LED 1 blinks 2 times, then LED 2 blinks 17 times. The cycle then repeats.
Alarm is “P17.”

Remote controller is detecting
error signal from indoor unit.

Indoor unit is detecting error signal from remote controller (and system controller).

Indoor unit is detecting error
signal from outdoor unit.

Improper setting of indoor unit or
remote controller.

During auto address setting,
number of connected units does
not correspond to number set.

When turning on the power
supply, number of connected
units does not correspond to
number set.

(Except R.C. address is “0.”)

Indoor unit communication error
of group control wiring.

Alarm contents

Error in receiving serial communication signal.
(Signal from main indoor unit in case of group control)

Ex: Auto address is not completed.

Error in transmitting serial communication signal.

Error in receiving serial communication signal.

When turning on the power supply, the number of connected
indoor units does not correspond to the number set. (Except R.C.

address is “0.”)

Error of the outdoor unit in receiving serial communication signal
from the indoor unit.

Indoor unit address setting is duplicated.

Remote controller address connector (RCU. ADR) is duplicated.
(Duplication of main remote controller)

Starting auto address setting is prohibited.
This alarm message shows that the auto address connector CN100

is shorted while other RC line is executing auto address operation.

Error in auto address setting. (Number of connected indoor units
is less than the number set)

Error in auto address setting. (Number of connected indoor units

is more than the number set)
No indoor unit is connected during auto address setting.

Error of outdoor unit address setting.

Error of main indoor unit in receiving serial communication signal

from sub indoor units.

Alarm

message

<E01>

<E02>

<<E03>>

E04

<E06>

E08

<<E09>>

E12

E15

E16

E20

E25

E18

Continued

1

2

3

4

5

6

7

8

5 - 13

1

2

3

4

5

6

7

7. Meaning of Alarm Messages

Possible cause of malfunction

Serial
communication
errors
Mis-setting

Activation of
protective
device

Thermistor
fault

EEPROM on indoor unit PCB failure

Protective
device for
compressor is
activated

Improper setting.

Protective device in indoor unit
is activated.

Protective device in outdoor unit
is activated.

Indoor thermistor is either open
or damaged.

Outdoor thermistor is either
open or damaged.

Protective device for compressor
No. 1 is activated.

Test Run

Alarm

message

This alarm message shows when the indoor unit for multiple-use
is not connected to the outdoor unit.

Duplication of main indoor unit address setting in group control.

Duplication of outdoor R.C. address setting.
There are 2 or more indoor units

controllers which have operation
mode priority in 1 refrigerant circuit.

Group control wiring is connected to individual control indoor unit.

Indoor unit address is not set.

Capacity code of indoor unit is not set.

Capacity code of outdoor unit is not set.

Mis-matched connection of outdoor units which have different kinds
of refrigerant.

4-way valve operation failure

Thermal protector in indoor unit fan motor is activated.

Improper wiring connections of ceiling panel.

Float switch is activated.

O

2

sensor (detects low oxygen level) activated.

Compressor thermal protector is activated.
Power supply voltage is unusual. (The voltage is more than 260 V
or less than 160 V between L1 and L2 phase.)

Incorrect discharge temperature.

High pressure switch is activated.

Detective phase (3-phase outdoor unit only)

Compressor running failure resulting from missing phase in the
compressor wiring, etc. (Start failure not caused by IPM or no gas.)

Outdoor unit fan motor is unusual.

Overcurrent at time of compressor runs more than 80Hz (DCCT
secondary current or ACCT primary current is detected at a time
other than when IPM has tripped.)

IPM trip (IPM current or temperature)

Inverter for compressor is unusual. (DC compressor does not
operate.)

Indoor coil temp. sensor (E1)

Indoor coil temp. sensor (E2)

Indoor coil temp. sensor (E3)

Indoor suction air (room) temp. sensor (TA)

Indoor discharge air temp. sensor (BL)

Compressor discharge sensor (TD) F04

Outdoor No. 1 coil liquid temp. sensor (C1)

Outdoor air temp. sensor (TO)

Compressor suction port temperature sensor (TS)

High pressure sensor

EEPROM on the outdoor unit PCB is a failure.

Current is not detected when comp. is ON.

Priority set remote controller

Non-priority set remote controller

L02

<L03>

L04

L05

L06

L07

L08

<<L09>>

L10

L17

L18

<<P01>>

<<P09>>

<<P10>>

P12Operation of protective function of fan inverter.

P14

P02

P03

P04

P05

P16

P22

P26

H31

P29

<<F01>>

<<F02>>

<<F03>>

<<F10>>

<<F11>>

F07

F08

F12

F16

F29

F31

H03

8

5 - 14

Contents

Electrical Data

6. ELECTRICAL DATA

1. Outdoor Unit ......................................................................................................................

(1) Electric Wiring Diagram U-36LE1U6, U-36LE1U6E ..................................................

(2) Electric Wiring Diagram U-52LE1U6, U-52LE1U6E ..................................................

2. Indoor Unit

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

6-2

6-2

6-4

1

2

3

4

5

6

7

6 - 1

8

1. Outdoor Unit

(1) Electric Wiring Diagram U-36LE1U6, U-36LE1U6E

Electrical Data

1

2

3

4

5

6

7

8

6 - 2

1. Outdoor Unit

Schematic Diagram U-36LE1U6, U-36LE1U6E

Electrical Data

1

2

3

4

5

6

6 - 3

7

8

1. Outdoor Unit

(2) Electric Wiring Diagram U-52LE1U6, U-52LE1U6E

Electrical Data

1

2

3

4

5

6

7

8

6 - 4

1. Outdoor Unit

Schematic Diagram U-52LE1U6, U-52LE1U6E

Electrical Data

1

2

3

4

5

6

6 - 5

7

8

– MEMO –

6 - 6

Contents

PCB and Functions

7. PCB AND FUNCTIONS

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

1-1. Outdoor Unit Control PCB CR-CHX06052 ....................................................................

1-2. Outdoor Unit HIC Board HIC-CHDX14053 ....................................................................

1-3. Functions (for CR-CHX06052) ......................................................................................

2. Indoor Unit Control PCB Switches and Functions

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

*

7-2

7-2
7-3
7-4

1

2

3

4

5

6

7

7 - 1

8

1. Outdoor Unit Control PCB

1-1. Outdoor Unit Control PCB CR-CHX06052

PCB and Functions

1

2

3

4

5

6

7

8

7 - 2

1. Outdoor Unit Control PCB

1-2. Outdoor Unit HIC Board HIC-CHDX14053

PCB and Functions

1

2

3

4

5

6

7 - 3

7

8

1

1. Outdoor Unit Control PCB

1-3. Functions (for CR-CHX06052)

CN51 2P plug (black): Automatic address setting pin

If the system address switch (S002: Factory setting is 0) is set to other than 0 (centralized

•
control), press this switch once to automatically set the address of the indoor unit to the
connected outdoor unit within the same system. While the automatic address setting is in
progress, 2 LEDs (red) on the outdoor unit control PCB blinks alternately. (The automatic
address operation will stop when this switch is pressed again.)
When other system in centralized control mode is in the progress of automatic address

•
setting, only the LED1 of the outdoor unit control PCB blinks and indicates that the
automatic address setting for other system is in progress. While other unit is in the progress
of automatic address setting, pressing S001 will disable the automatic address setting.

S002 Rotary switch (10 positions, black): Outdoor system address setting switch

•

The factory setting is 0 (1 system control), but it is necessary to set the address to each
system with the multiple system control or centralized control. (Fig.7-1)

•

When system address is set to 0, automatic address will start simultaneously with power
activation, and it is not necessary to set the automatic address setting with SW01 switch
when there is only a single or simultaneously running multiple controls in a single system.

•

When multiple systems are operated in centralized control, maximum of 30 systems (up
to indoor unit 64 units) can be connected. When operated by group control or centralized
control, set the system address other than 0 (1 or more).

•

When the number of systems exceeds 9, you can set up to 30 systems by combining with
the dip switch S003. You can set up to 39, however control will be for 30 systems even if you
set more than 30. (For details, refer to Table 7-1.)

•

LED1 of the outdoor unit control PCB lights up and the warning “
control when the system addresses has overlapped (multiple equated addresses exist).

PCB and Functions

” is displayed in remote

2

3

4

5

6

7

S003 DIP switch (2P, blue): Switches for setting system address 10s digit and 20s digit

If 10 systems or more are set, the setting is made by a combination of this DIP switch and

•
S002.
If 10 - 19 systems are set, set switch 1P (10s digit) to ON.

•
If 20 - 29 systems are set, set switch 2P (20s digit) to ON, and set switch 1P (10s digit) to

•
OFF.
If 30 systems are set, set both switch 1P (10s digit) and switch 2P (20s digit) to ON. (For

•
details, refer to Table 7-1.)

CN14 2P plug (white): PCB inspection pin at the factory

8

7 - 4

PCB and Functions

1. Outdoor Unit Control PCB

CN15 The control operations that are shown below are when you short-circuit this cooling inspection

pin located on the outdoor unit control PCB.

1.Thermistor inspection

Thermistor

Discharge temperature (TD) LED1 lights up

Outdoor temperature (TO) LED2 lights up
Heat exchanger temperature (C1) LED1 lights up
Heat exchanger temperature (C2) LED2 lights up

Air inlet temperature (TS) LED1 lights up

↓

2. Turn ON the four-way valve for one second

3. Forced cooling operation

CN50 This pin is used to perform automatic address while operating the compressor. Normally,

automatic address can be performed in Heating mode, short-circuit this pin to perform
automatic address when operation is in Cooling mode.

Detection results

Normal Error

LED1, 2 turns off

CN33 3P plug (black): Terminal plug of the communications circuit

•

A connecting socket (2P, black) for short circuiting is attached to the terminal plug at the
time of shipment from the factory.

•

When multiple systems are operated in centralized control, leave the connecting socket in
place at only 1 of the outdoor unit in system address, and then replace the socket 2 to 3
from the outdoor unit (other than 1). If multiple connecting sockets are left in place while
operated in centralized control, communications trouble will occur.

•

When there is only single (system address 0) connecting socket of 1 system, do not remove
the connecting socket. (It is for the warning “

CN028 2P plug (white): Silent mode operation pin

Operates the outdoor fan and compressor frequency with a limitation.

•
When relay turns ON, operating noise becomes low.

•

Relay
(field supply)

Silent
CN028

Outdoor unit control PCB
Note 1: Make the length of the wire between the outdoor unit control PCB to Relay within 6.5 ft.

2P socket with lead wire (Service parts: Parts code/CV6231612098)

•
Relay fi eld supply contact input specifi cation DC5V and 0.5mA

•
(Recommended relay; The Fuji Electric Co. /HH62SW nano-contact point
correspondence)
Use commercially available timer. (Omron “H5” daily time switch, etc.)

•

Power
source

”.)

1

2

3

4

External contact
(Timer input, etc.: field supply)

5

6

7 - 5

7

8

1

2

3

4

1. Outdoor Unit Control PCB

Table 7-1. Setting the System Address

[S002: Rotary switch (black), S003: 2P DIP (green or blue)]

1

refrigerant

system

only

When
operated in
centralized

control

Outdoor

system

address No.

1 0 OFF OFF

1
2
3
4
5
6
7
8
9

10
11
12
13
14
15
16
17
18
19

20
21
22
23
24
25
26
27
28
29

30 0 ON ON

S002 setting

(System

address

switch)

1
2
3
4
5
6
7
8
9

0
1
2
3
4
5
6
7
8
9

0
1
2
3
4
5
6
7
8
9

S003 setting

1P

(10s digit)

OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF

ON
ON
ON
ON
ON
ON
ON
ON
ON
ON

OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF

2P

(20s digit)

OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF

OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF

ON
ON
ON
ON
ON
ON
ON
ON
ON
ON

System
controller

Outdoor
unit

Indoor
unit

Outdoor
unit

Indoor
unit

Fig. 7-1

PCB and Functions

Outdoor
unit

Indoor
unit

Outdoor
unit

Indoor
unit

5

6

7

8

7 - 6

Contents

Capacity Table

8. CAPACITY TABLE

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

1-1. U-36LE1U6, U-36LE1U6E (Cooling) ............................................................................

1-2. U-36LE1U6, U-36LE1U6E (Heating) ............................................................................

1-3. U-52LE1U6, U-52LE1U6E (Cooling) ............................................................................

1-4. U-52LE1U6, U-52LE1U6E (Heating) ............................................................................

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

8-2

8-2
8-4
8-6
8-8

8-10

8-102-1. 4-Way Cassette Type (U1 Type), 4-Way Cassette 60×60 Type (Y1 Type) ..................

8-162-2. 1-Way Cassette Type (D1 Type) .................................................................................

8-192-3. Wall Mounted Type (K1 Type) .....................................................................................

8-252-4. Ceiling Type (T1 Type) ................................................................................................

8-282-5. Low Silhouette Ducted Type (F1 Type), Slim Low Static Ducted Type (M1 Type) .......

8-422-6. High Static Pressure Ducted Type (E1 Type) .............................................................

8-442-7. Floor Standing Type (P1 Type) ...................................................................................

8-502-8. Concealed Floor Standing Type (R1 Type) .................................................................

1

2

3

4

5

6

7

8

8 - 1

1. Capacity Ratio of Outdoor Unit

1-1. U-36LE1U6, U-36LE1U6E (Cooling)

MINI VRF Capacity Ratio 50-130%

Combination(%):

Indoor/outdoor

capacity ratio

130% 20.0 10.1 1.50 11.0 1.70 11.8 1.89 12.7 2.10 13.5 2.28 14.3 2.46 15.2 2.71

Outdoor

air temp.

°CDB

-10.0 10.1 0.99 11.0 1.17 11.8 1.32 12.7 1.50 13.5 1.62 14.3 1.74 15.2 1.86

-5.0 10.1 1.02 11.0 1.20 11.8 1.35 12.7 1.56 13.5 1.68 14.3 1.80 15.2 1.92

0.0 10.1 1.08 11.0 1.26 11.8 1.41 12.7 1.62 13.5 1.77 14.3 1.86 15.2 2.01

5.0 10.1 1.14 11.0 1.32 11.8 1.50 12.7 1.71 13.5 1.83 14.3 1.98 15.2 2.13

10.0 10.1 1.23 11.0 1.41 11.8 1.59 12.7 1.80 13.5 1.95 14.3 2.10 15.2 2.25

15.0 10.1 1.35 11.0 1.55 11.8 1.74 12.7 1.92 13.5 2.10 14.3 2.28 15.2 2.46

25.0 10.1 1.68 11.0 1.89 11.8 2.10 12.7 2.34 13.5 2.52 14.3 2.71 15.2 3.13

30.0 10.1 1.92 11.0 2.13 11.8 2.34 12.7 2.64 13.5 3.01 14.3 3.22 14.8 3.34

35.0 10.1 2.25 11.0 2.49 11.8 2.74 12.7 3.01 13.5 3.25 13.9 3.43 14.3 3.55

40.0 10.1 2.64 11.0 2.89 11.8 3.13 12.3 3.46 12.8 3.55 13.2 3.58 13.4 3.58

43.0 10.1 3.01 11.0 3.25 11.1 3.40 11.6 3.55 12.1 3.58 12.3 3.58 12.8 3.58

16.0 17.0 18.0 19.0 20.0 21.0

TC PI TC PI TC PI TC PI

kW kW kW kW kW kW kW kW

Indoor air temp. : °CWB

Capacity Table

TC: Total capacity (kW), PI: Power input (kW)

TC

PI TC PI TC PI

kW kW kW kW kW

kW

22.0

1

2

3

4

5

6

Combination(%):

Indoor/outdoor

capacity ratio

120% 20.0 9.7 1.46 10.6 1.65 11.4 1.84 12.2 2.05 13.0 2.23 13.8 2.40 14.6 2.64

Combination(%):

Indoor/outdoor

capacity ratio

110% 20.0 9.4 1.42 10.2 1.61 11.0 1.79 11.8 1.99 12.5 2.16 13.3 2.33 14.1 2.56

Combination(%):

Indoor/outdoor

capacity ratio

100% 20.0 9.0 1.38 9.7 1.56 10.4 1.74 11.2 1.93 11.9 2.10 12.7 2.26 13.4 2.48

Outdoor

air temp.

°CDB

-10.0 9.7 0.97 10.6 1.14 11.4 1.29 12.2 1.46 13.0 1.58 13.8 1.70 14.6 1.82

-5.0 9.7 1.00 10.6 1.17 11.4 1.32 12.2 1.52 13.0 1.64 13.8 1.76 14.6 1.87

0.0 9.7 1.05 10.6 1.23 11.4 1.38 12.2 1.58 13.0 1.73 13.8 1.82 14.6 1.96

5.0 9.7 1.11 10.6 1.29 11.4 1.46 12.2 1.67 13.0 1.79 13.8 1.93 14.6 2.08

10.0 9.7 1.20 10.6 1.38 11.4 1.55 12.2 1.76 13.0 1.90 13.8 2.05 14.6 2.20

15.0 9.7 1.32 10.6 1.51 11.4 1.70 12.2 1.87 13.0 2.05 13.8 2.23 14.6 2.40

25.0 9.7 1.64 10.6 1.84 11.4 2.05 12.2 2.28 13.0 2.46 13.8 2.64 14.6 3.05

30.0 9.7 1.87 10.6 2.08 11.4 2.28 12.2 2.58 13.0 2.93 13.8 3.13 14.3 3.25

35.0 9.7 2.20 10.6 2.43 11.4 2.66 12.2 2.93 13.0 3.16 13.4 3.34 13.8 3.46

40.0 9.7 2.58 10.6 2.81 11.4 3.05 11.8 3.37 12.3 3.46 12.8 3.54 13.1 3.58

43.0 9.7 2.93 10.6 3.16 10.7 3.31 11.2 3.46 11.7 3.57 12.0 3.58 12.4 3.58

Outdoor

air temp.

°CDB

-10.0 9.4 0.94 10.2 1.11 11.0 1.25 11.8 1.42 12.5 1.54 13.3 1.65 14.1 1.76

-5.0 9.4 0.97 10.2 1.14 11.0 1.28 11.8 1.48 12.5 1.59 13.3 1.71 14.1 1.82

0.0 9.4 1.02 10.2 1.19 11.0 1.34 11.8 1.54 12.5 1.68 13.3 1.76 14.1 1.90

5.0 9.4 1.08 10.2 1.25 11.0 1.42 11.8 1.62 12.5 1.73 13.3 1.88 14.1 2.02

10.0 9.4 1.17 10.2 1.34 11.0 1.51 11.8 1.71 12.5 1.85 13.3 1.99 14.1 2.13

15.0 9.4 1.28 10.2 1.46 11.0 1.65 11.8 1.82 12.5 1.99 13.3 2.16 14.1 2.33

25.0 9.4 1.59 10.2 1.79 11.0 1.99 11.8 2.22 12.5 2.39 13.3 2.56 14.1 2.96

30.0 9.4 1.82 10.2 2.02 11.0 2.22 11.8 2.50 12.5 2.84 13.3 3.04 13.8 3.16

35.0 9.4 2.13 10.2 2.36 11.0 2.59 11 .8 2. 84 12.5 3.07 12.9 3.24 13.3 3.35

40.0 9.4 2.50 10.2 2.73 11.0 2.96 11.4 3.27 11.9 3.35 12.3 3.44 12.7 3.53

43.0 9.4 2.84 10.2 3.07 10.3 3.21 10.8 3.35 11.3 3.47 11.8 3.58 12.1 3.58

Outdoor

air temp.

°CDB

-10.0 9.0 0.91 9.7 1.08 10.4 1.21 11.2 1.38 11.9 1.49 12.7 1.60 13.4 1.71

-5.0 9.0 0.94 9.7 1.10 10.4 1.24 11.2 1.44 11.9 1.55 12.7 1.66 13.4 1.77

0.0 9.0 0.99 9.7 1.16 10.4 1.30 11.2 1.49 11.9 1.63 12.7 1.71 13.4 1.85

5.0 9.0 1.05 9.7 1.21 10.4 1.38 11.2 1.57 11.9 1.68 12.7 1.82 13.4 1.96

10.0 9.0 1.13 9.7 1.30 10.4 1.46 11.2 1.66 11.9 1.79 12.7 1.93 13.4 2.07

15.0 9.0 1.24 9.7 1.42 10.4 1.60 11.2 1.77 11.9 1.93 12.7 2.10 13.4 2.26

25.0 9.0 1.55 9.7 1.74 10.4 1.93 11.2 2.15 11.9 2.32 12.7 2.48 13.4 2.87

30.0 9.0 1.77 9.7 1.96 10.4 2.15 11.2 2.43 11.9 2.76 12.7 2.95 13.1 3.06

35.0 9.0 2.07 9.7 2.29 10.4 2.51 11. 2 2.7 6 11.9 2.98 12.3 3.15 12.7 3.26

40.0 9.0 2.43 9.7 2.65 10.4 2.87 10.9 3.17 11.3 3.26 11.8 3.34 12.1 3.42

43.0 9.0 2.76 9.7 2.98 9.9 3.12 10.3 3.26 10.8 3.37 11.2 3.48 11.6 3.53

16.0 17.0 18.0 19.0 20.0 21.0 22.0

TC PI TC PI TC PI TC PI TC PI TC PI TC PI

kW kW kW kW kW kW kW kW kW kW kW kW kW kW

16.0 17.0 18.0 19.0 20.0 21.0 22.0

TC PI TC

kW kW kW kW kW kW kW kW kW kW kW kW kW kW

16.0 17.0 18.0 19.0 20.0 21.0 22.0

TC PI TC

kW kW kW kW kW kW kW kW kW kW kW kW kW kW

PI

TC PI TC PI TC PI TC PI TC PI

PI

TC PI TC PI TC PI TC PI TC PI

Indoor air temp. : °CWB

Indoor air temp. : °CWB

Indoor air temp. : °CWB

7

8

Combination(%):

Indoor/outdoor

capacity ratio

90% 20.0 8.1 1.17 8.7 1.33 9.4 1.48 10.1 1.64 10.7 1.78 11.4 1.92 12.1 2.11

Outdoor

air temp.

°CDB

-10.0 8.1 0.77 8.7 0.91 9.4 1.03 10.1 1.17 10.7 1.27 11.4 1.36 12.1 1.45

-5.0 8.1 0.80 8.7 0.94 9.4 1.06 10.1 1.22 10.7 1.31 11.4 1.41 12.1 1.50

0.0 8.1 0.84 8.7 0.99 9.4 1.10 10.1 1.27 10.7 1.38 11.4 1.45 12.1 1.57

5.0 8.1 0.89 8.7 1.03 9.4 1.17 10.1 1.34 10.7 1.43 11.4 1.55 12.1 1.67

10.0 8.1 0.96 8.7 1.10 9.4 1.24 10.1 1.41 10.7 1.52 11.4 1.64 12.1 1.76

15.0 8.1 1.06 8.7 1.21 9.4 1.36 10.1 1.50 10.7 1.64 11.4 1.78 12.1 1.92

25.0 8.1 1.31 8.7 1.48 9.4 1.64 10.1 1.83 10.7 1.97 11.4 2.11 12.1 2.44

30.0 8.1 1.50 8.7 1.67 9.4 1.83 10.1 2.06 10.7 2.35 11.4 2.51 11.8 2.60

35.0 8.1 1.76 8.7 1.95 9.4 2.13 10.1 2.35 10.7 2.53 11.1 2.67 11.4 2.77

40.0 8.1 2.06 8.7 2.25 9.4 2.44 9.8 2.70 10.2 2.77 10.6 2.84 10.9 2.91

43.0 8.1 2.35 8.7 2.53 8.9 2.65 9.3 2.77 9.7 2.86 10.1 2.96 10.5 3.00

16.0 17.0 18.0 19.0 20.0 21.0 22.0

TC PI TC PI TC PI TC PI TC PI TC PI TC PI

kW kW kW kW kW kW kW kW kW kW kW kW kW kW

Indoor air temp. : °CWB

8 - 2

1. Capacity Ratio of Outdoor Unit

Capacity Table

MINI VRF Capacity Ratio 50-130%

Combination(%):

Indoor/outdoor

capacity ratio

80% 20.0 7.2 0.98 7.8 1.11 8.4 1.23 9.0 1.37 9.6 1.49 10.2 1.61 10.8 1.76

Combination(%):

Indoor/outdoor

capacity ratio

70% 20.0 6.3 0.80 6.8 0.90 7.3 1.01 7.8 1.12 8.4 1.22 8.9 1.31 9.4 1.44

Combination(%):

Indoor/outdoor

capacity ratio

60% 20.0 5.4 0.65 5.8 0.73 6.3 0.82 6.7 0.91 7.2 0.99 7.6 1.06 8.1 1.17

Outdoor

air temp.

°CDB

-10.0 7.2 0.65 7.8 0.76 8.4 0.86 9.0 0.98 9.6 1.06 10.2 1.14 10.8 1.21

-5.0 7.2 0.67 7.8 0.78 8.4 0.88 9.0 1.02 9.6 1.10 10.2 1.18 10.8 1.25

0.0 7.2 0.71 7.8 0.82 8.4 0.92 9.0 1.06 9.6 1.16 10.2 1.21 10.8 1.31

5.0 7.2 0.74 7.8 0.86 8.4 0.98 9.0 1.12 9.6 1.20 10.2 1.29 10.8 1.39

10.0 7.2 0.80 7.8 0.92 8.4 1.04 9.0 1.18 9.6 1.27 10.2 1.37 10.8 1.47

15.0 7.2 0.88 7.8 1.01 8.4 1.14 9.0 1.25 9.6 1.37 10.2 1.49 10.8 1.61

25.0 7.2 1.10 7.8 1.23 8.4 1.37 9.0 1.53 9.6 1.65 10.2 1.76 10.8 2.04

30.0 7.2 1.25 7.8 1.39 8.4 1.53 9.0 1.72 9.6 1.96 10.2 2.10 10.5 2.18

35.0 7.2 1.47 7.8 1.63 8.4 1.78 9.0 1.96 9.6 2.12 9.9 2.23 10.1 2.31

40.0 7.2 1.72 7.8 1.88 8.4 2.04 8.7 2.25 9.0 2.31 9.4 2.37 9.7 2.43

43.0 7.2 1.96 7.8 2.12 7.9 2.21 8.2 2.31 8.6 2.39 9.0 2.47 9.3 2.51

Outdoor

air temp.

°CDB

-10.0 6.3 0.53 6.8 0.62 7.3 0.70 7.8 0.80 8.4 0.86 8.9 0.93 9.4 0.99

-5.0 6.3 0.54 6.8 0.64 7.3 0.72 7.8 0.83 8.4 0.90 8.9 0.96 9.4 1.02

0.0 6.3 0.58 6.8 0.67 7.3 0.75 7.8 0.86 8.4 0.94 8.9 0.99 9.4 1.07

5.0 6.3 0.61 6.8 0.70 7.3 0.80 7.8 0.91 8.4 0.98 8.9 1.06 9.4 1.14

10.0 6.3 0.66 6.8 0.75 7.3 0.85 7.8 0.96 8.4 1.04 8.9 1.12 9.4 1.20

15.0 6.3 0.72 6.8 0.82 7.3 0.93 7.8 1.02 8.4 1.12 8.9 1.22 9.4 1.31

25.0 6.3 0.90 6.8 1.01 7.3 1.12 7.8 1.25 8.4 1.34 8.9 1.44 9.4 1.66

30.0 6.3 1.02 6.8 1.14 7.3 1.25 7.8 1.41 8.4 1.60 8.9 1.71 9.2 1.78

35.0 6.3 1.20 6.8 1.33 7.3 1.46 7.8 1.60 8.4 1.73 8.6 1.82 8.9 1.89

40.0 6.3 1.41 6.8 1.54 7.3 1.66 7.6 1.84 7.9 1.89 8.2 1.94 8.5 1.98

43.0 6.3 1.60 6.8 1.73 6.9 1.81 7.2 1.89 7.5 1.95 7.8 2.02 8.2 2.05

Outdoor

air temp.

°CDB

-10.0 5.4 0.43 5.8 0.51 6.3 0.57 6.7 0.65 7.2 0.70 7.6 0.75 8.1 0.80

-5.0 5.4 0.44 5.8 0.52 6.3 0.58 6.7 0.67 7.2 0.73 7.6 0.78 8.1 0.83

0.0 5.4 0.47 5.8 0.54 6.3 0.61 6.7 0.70 7.2 0.77 7.6 0.80 8.1 0.87

5.0 5.4 0.49 5.8 0.57 6.3 0.65 6.7 0.74 7.2 0.79 7.6 0.86 8.1 0.92

10.0 5.4 0.53 5.8 0.61 6.3 0.69 6.7 0.78 7.2 0.84 7.6 0.91 8.1 0.97

15.0 5.4 0.58 5.8 0.67 6.3 0.75 6.7 0.83 7.2 0.91 7.6 0.99 8.1 1.06

25.0 5.4 0.73 5.8 0.82 6.3 0.91 6.7 1.01 7.2 1.09 7.6 1.17 8.1 1.35

30.0 5.4 0.83 5.8 0.92 6.3 1.01 6.7 1.14 7.2 1.30 7.6 1.39 7.9 1.44

35.0 5.4 0.97 5.8 1.08 6.3 1.18 6.7 1.30 7.2 1.40 7.4 1.48 7.6 1.53

40.0 5.4 1.14 5.8 1.25 6.3 1.35 6.5 1.49 6.8 1.53 7.1 1.57 7.3 1.61

43.0 5.4 1.30 5.8 1.40 5.9 1.47 6.2 1.53 6.5 1.58 6.7 1.63 7.0 1.66

16.0 17.0 18.0 19.0 20.0 21.0 22.0
TC PI TC PI TC PI TC PI TC PI TC PI TC PI
kW kW kW kW kW kW kW kW kW kW kW kW kW kW

16.0 17.0 18.0 19.0 20.0 21.0 22.0
TC PI TC PI TC PI TC PI TC PI TC PI TC PI
kW kW kW kW kW kW kW kW kW kW kW kW kW kW

16.0 17.0 18.0 19.0 20.0 21.0 22.0
TC PI TC PI TC PI TC PI TC PI TC PI TC PI
kW kW kW kW kW kW kW kW kW kW kW kW kW kW

Indoor air temp. : °CWB

Indoor air temp. : °CWB

Indoor air temp. : °CWB

TC: Total capacity (kW), PI: Power input (kW)

1

2

3

Combination(%):

Indoor/outdoor

capacity ratio

50% 20.0 4.5 0.50 4.8 0.56 5.2 0.63 5.6 0.70 6.0 0.76 6.3 0.81 6.7 0.89

Outdoor

air temp.

°CDB

-10.0 4.5 0.33 4.8 0.39 5.2 0.44 5.6 0.50 6.0 0.54 6.3 0.58 6.7 0.62

10.0 4.5 0.41 4.8 0.47 5.2 0.53 5.6 0.60 6.0 0.65 6.3 0.70 6.7 0.75

15.0 4.5 0.45 4.8 0.51 5.2 0.58 5.6 0.64 6.0 0.70 6.3 0.76 6.7 0.81

25.0 4.5 0.56 4.8 0.63 5.2 0.70 5.6 0.78 6.0 0.83 6.3 0.89 6.7 1.03

30.0 4.5 0.64 4.8 0.71 5.2 0.78 5.6 0.87 6.0 0.99 6.3 1.06 6.6 1.10

35.0 4.5 0.75 4.8 0.82 5.2 0.90 5.6 0.99 6.0 1.07 6.2 1.13 6.3 1.17

40.0 4.5 0.87 4.8 0.95 5.2 1.03 5.4 1.14 5.7 1.17 5.9 1.20 6.0 1.23

43.0 4.5 0.99 4.8 1.07 4.9 1.12 5.2 1.17 5.4 1.21 5.6 1.25 5.8 1.27

TC PI TC PI TC PI TC PI TC PI TC PI TC PI
kW kW kW kW kW kW kW kW kW kW kW kW kW kW

-5.0 4.5 0.34 4.8 0.40 5.2 0.45 5.6 0.52 6.0 0.56 6.3 0.60 6.7 0.64

0.0 4.5 0.36 4.8 0.42 5.2 0.47 5.6 0.54 6.0 0.59 6.3 0.62 6.7 0.67

5.0 4.5 0.38 4.8 0.44 5.2 0.50 5.6 0.57 6.0 0.61 6.3 0.66 6.7 0.71

Indoor air temp. : °CWB

20.0 21.0 22.016.0 17.0 18.0 19.0

8 - 3

4

5

6

7

8

1. Capacity Ratio of Outdoor Unit

1-2. U-36LE1U6, U-36LE1U6E (Heating)

MINI VRF Capacity Ratio 50-130%

Combination(%):

Indoor/outdoor

capacity ratio

130% 0.8 0.0 15.4 3.74 15.3 3.74 14.6 3.52 14.1 3.46 13.6 3.31 12.7 3.07 11.7 2.77

Outdoor
air temp.

DB WB kW kW kW kW kW kW kW kW kW kW kW kW kW kW

-19.8 -20.0 9.9 3.25 9.6 3.22 9.3 3.19 9.2 3.13 9.0 3.10 8.8 3.04 8.5 2.98

-14.7 -15.0 11.3 3.43 11.0 3.40 10.7 3.34 10.6 3.28 10.5 3.25 10.2 3.22 9.9 3.16

-9.6 -10.0 12.9 3.58 12.6 3.55 12.3 3.52 12.1 3.46 11.9 3.40 11.6 3.37 11.4 3.34

-4.4 -5.0 14.3 3.74 14.1 3.74 13.8 3.68 13.7 3.61 13.6 3.58 12.7 3.40 11.7 3.13

-1.8 -2.5 15.0 3.74 14.7 3.74 14.6 3.68 14.1 3.61 13.6 3.46 12.7 3.22 11.7 2.95

2.8 2.0 15.7 3.74 15.5 3.74 14.6 3.37 14.1 3.31 13.6 3.19 12.7 2.92 11.7 2.62

6.0 5.0 16.3 3.74 15.5 3.58 14.6 3.16 14.1 3.10 13.6 2.92 12.7 2.71 11.7 2.41

7.0 6.0 16.4 3.74 15.5 3.52 14.6 3.07 14.1 3.01 13.6 2.86 12.7 2.62 11.7 2.32

8.6 7.5 16.5 3.68 15.5 3.40 14.6 2.98 14.1 2.92 13.6 2.80 12.7 2.53 11.7 2.23

11.2 10.0 16.5 3.49 15.5 3.19 14.6 2.80 14.1 2.74 13.6 2.62 12.7 2.35 11.7 2.05

16.415.0 16.53.1615.52.8614.62.4414.12.3813.62.2612.72.0511.7 1.69

15.0 17.0 19.0 20.0 21.0 23.0 25.0

TC PI TC PI TC PI TC PI TC PI TC PI TC PI

Capacity Table

TC: Total capacity (kW), PI: Power input (kW)

Indoor air temp. : °CDB

1

2

3

4

5

6

Combination(%):

Indoor/outdoor

capacity ratio

120% 0.8 0.0 15.0 3.74 14.8 3.74 14.1 3.47 13.6 3.41 13.1 3.26 12.2 3.02 11.3 2.73

Combination(%):

Indoor/outdoor

capacity ratio

110% 0.8 0.0 14.63.7414.43.7413.63.4213.13.3612.73.2211.82.9810.92.69

Combination(%):

Indoor/outdoor

capacity ratio

100% 0.8 0.0 14.0 3.74 13.8 3.69 12.9 3.37 12.5 3.31 12.1 3.17 11.3 2.94 10.4 2.65

Outdoor
air temp.

DB WB kW kW kW kW kW kW kW kW kW kW kW kW kW kW

-19.8 -20.0 9.5 3.20 9.2 3.17 9.0 3.14 8.8 3.08 8.7 3.05 8.4 2.99 8.2 2.93

-14.7 -15.0 10.9 3.38 10.6 3.35 10.3 3.29 10.2 3.23 10.1 3.20 9.8 3.17 9.5 3.11

-9.6 -10.0 12.4 3.53 12.1 3.50 11.8 3.47 11.7 3.41 11.4 3.35 11.2 3.32 11.0 3.29

-4.4 -5.0 13.9 3.70 13.6 3.67 13.3 3.62 13.2 3.56 13.1 3.53 12.2 3.35 11.3 3.08

-1.8 -2.5 14.4 3.74 14.3 3.70 14.1 3.62 13.6 3.56 13.1 3.41 12.2 3.17 11.3 2.90

2.8 2.0 15.3 3.74 15.0 3.67 14.1 3.32 13.6 3.26 13.1 3.14 12.2 2.87 11.3 2.58

6.0 5.0 15.8 3.74 15.0 3.53 14.1 3.11 13.6 3.05 13.1 2.87 12.2 2.67 11.3 2.37

7.0 6.0 15.9 3.73 15.0 3.47 14.1 3.02 13.6 2.96 13.1 2.82 12.2 2.58 11.3 2.28

8.6 7.5 15.9 3.62 15.0 3.35 14.1 2.93 13.6 2.87 13.1 2.76 12.2 2.49 11.3 2.19

11.2 10.0 15.9 3.44 15.0 3.14 14.1 2.76 13.6 2.70 13.1 2.58 12.2 2.31 11.3 2.02

16.4 15.0 15.9 3.11 15.0 2.82 14.1 2.40 13.6 2.34 13.1 2.22 12.2 2.02 11.3 1.66

Outdoor
air temp.

DB WB kW kW kW kW kW kW kW kW kW kW kW kW kW kW

-19.8 -20.0 9.2 3.16 8.9 3.13 8.7 3.10 8.5 3.04 8.4 3.01 8.1 2.95 7.9 2.89

-14.7 -15.0 10.5 3.33 10.2 3.30 10.0 3.24 9.8 3.19 9.7 3.16 9.5 3.13 9.2 3.07

-9.6 -10.0 11.9 3.48 11.7 3.45 11.4 3.42 11.3 3.36 11.0 3.30 10.8 3.27 10.6 3.24

-4.4 -5.0 13.4 3.65 13.1 3.62 12.9 3.57 12.7 3.51 12.7 3.48 11.8 3.30 10.9 3.04

-1.8 -2.5 14.0 3.71 13.8 3.65 13.6 3.57 13.1 3.51 12.7 3.36 11.8 3.13 10.9 2.86

2.8 2.0 14.8 3.74 14.4 3.62 13.6 3.27 13.1 3.22 12.7 3.10 11.8 2.84 10.9 2.54

6.0 5.0 15.4 3.74 14.4 3.48 13.6 3.07 13.1 3.01 12.7 2.84 11.8 2.63 10.9 2.34

7.0 6.0 15.4 3.68 14.4 3.42 13.6 2.98 13.1 2.92 12.7 2.78 11.8 2.54 10.9 2.25

8.6 7.5 15.4 3.57 14.4 3.30 13.6 2.89 13.1 2.84 12.7 2.72 11.8 2.46 10.9 2.16

11.2 10.0 15.4 3.39 14.4 3.10 13.6 2.72 13.1 2.66 12.7 2.54 11.8 2.28 10.9 1.99

16.415.0 15.43.0714.42.7813.62.3713.12.3112.72.1911.8 1.9910.91.64

Outdoor
air temp.

DB WB kW kW kW kW kW kW kW kW kW kW kW kW kW kW

-19.8 -20.0 8.8 3.11 8.5 3.08 8.3 3.05 8.1 3.00 8.0 2.97 7.8 2.91 7.5 2.85

-14.7 -15.0 10.0 3.28 9.8 3.25 9.5 3.20 9.4 3.14 9.3 3.11 9.0 3.08 8.8 3.02

-9.6 -10.0 11.4 3.43 11.1 3.40 10.9 3.37 10.8 3.31 10.5 3.25 10.3 3.23 10.1 3.20

-4.4 -5.0 12.8 3.60 12.5 3.57 12.3 3.51 12.1 3.46 12.1 3.43 11.3 3.25 10.4 3.00

-1.8 -2.5 13.4 3.66 13.1 3.60 12.9 3.51 12.5 3.46 12.1 3.31 11.3 3.08 10.4 2.82

2.8 2.0 14.3 3.74 13.8 3.57 12.9 3.23 12.5 3.17 12.1 3.05 11.3 2.79 10.4 2.51

6.0 5.0 14.6 3.69 13.8 3.43 12.9 3.02 12.5 2.97 12.1 2.79 11.3 2.59 10.4 2.30

7.0 6.0 14.6 3.63 13.8 3.37 12.9 2.94 12.5 2.88 12.1 2.74 11.3 2.51 10.4 2.22

8.6 7.5 14.6 3.51 13.8 3.25 12.9 2.85 12.5 2.79 12.1 2.68 11.3 2.42 10.4 2.13

11.2 10.0 14.6 3.34 13.8 3.05 12.9 2.68 12.5 2.62 12.1 2.51 11.3 2.25 10.4 1.96

16.415.0 14.63.0213.82.7412.92.3312.52.2812.12.1611.3 1.9610.41.61

15.0 17.0 19.0 20.0 21.0 23.0 25.0

TC PI TC PI TC PI TC PI TC PI TC PI TC PI

15.0 17.0 19.0 20.0 21.0 23.0 25.0

TC PI TC PI TC PI TC PI TC PI TC PI TC PI

15.0 17.0 19.0

TC PI TC PI TC PI TC PI TC PI TC PI TC PI

Indoor air temp. : °CDB

Indoor air temp. : °CDB

Indoor air temp. : °CDB

20.0 21.0 23.0 25.0

7

8

Combination(%):

Indoor/outdoor

capacity ratio

90% 0.8 0.0 12.6 3.29 12.4 3.24 11.6 2.97 11.3 2.91 10.9 2.79 10.1 2.59 9.3 2.33

Outdoor
air temp.

DB WB kW kW kW kW kW kW kW kW kW kW kW kW kW kW

-19.8 -20.0 7.9 2.74 7.7 2.71 7.4 2.69 7.3 2.64 7.2 2.61 7.0 2.56 6.8 2.51

-14.7 -15.0 9.0 2.89 8.8 2.86 8.6 2.81 8.4 2.76 8.3 2.74 8.1 2.71 7.9 2.66

-9.6 -10.0 10.2 3.02 10.0 2.99 9.8 2.97 9.7 2.91 9.5 2.86 9.2 2.84 9.1 2.81

-4.4 -5.0 11.5 3.17 11.3 3.14 11.0 3.09 10.9 3.04 10.9 3.02 10.1 2.86 9.3 2.64

-1.8 -2.5 12.0 3.22 11.8 3.17 11.6 3.09 11.3 3.04 10.9 2.91 10.1 2.71 9.3 2.48

2.8 2.0 12.8 3.29 12.4 3.14 11.6 2.84 11.3 2.79 10.9 2.69 10.1 2.46 9.3 2.20

6.0 5.0 13.2 3.24 12.4 3.02 11.6 2.66 11.3 2.61 10.9 2.46 10.1 2.28 9.3 2.03

7.0 6.0 13.2 3.19 12.4 2.97 11.6 2.59 11.3 2.53 10.9 2.41 10.1 2.20 9.3 1.95

8.6 7.5 13.2 3.09 12.4 2.86 11.6 2.51 11.3 2.46 10.9 2.36 10.1 2.13 9.3 1.88

11.2 10.0 13.2 2.94 12.4 2.69 11.6 2.36 11.3 2.31 10.9 2.20 10.1 1.98 9.3 1.72

16.4 15.0 13.2 2.66 12.4 2.41 11.6 2.05 11.3 2.00 10.9 1.90 10.1 1.72 9.3 1.42

TC PI TC PI TC PI TC PI TC PI TC PI TC PI

Indoor air temp. : °CDB

20.0 21.0 23.0 25.015.0 17.0 19.0

8 - 4

1. Capacity Ratio of Outdoor Unit

Capacity Table

MINI VRF Capacity Ratio 50-130%

Combination(%):

Indoor/outdoor

capacity ratio

80% 0.8 0.0 11.2 2.85 11.0 2.80 10.4 2.56 10.0 2.52 9.7 2.41 9.0 2.23 8.3 2.01

Combination(%):

Indoor/outdoor

capacity ratio

70% 0.8 0.0 9.8 2.40 9.6 2.36 9.1 2.16 8.8 2.12 8.4 2.03 7.9 1.88 7.3 1.70

Combination(%):

Indoor/outdoor

capacity ratio

60% 0.8 0.0 8.4 2.02 8.3 1.99 7.8 1.82 7.5 1.79 7.2 1.71 6.8 1.59 6.2 1.43

Outdoor
air temp.

DB WB kW kW kW kW kW kW kW kW kW kW kW kW kW kW

-19.8 -20.0 7.0 2.36 6.8 2.34 6.6 2.32 6.5 2.28 6.4 2.25 6.2 2.21 6.0 2.17

-14.7 -15.0 8.0 2.50 7.8 2.47 7.6 2.43 7.5 2.39 7.4 2.36 7.2 2.34 7.0 2.30

-9.6 -10.0 9.1 2.60 8.9 2.58 8.7 2.56 8.6 2.52 8.4 2.47 8.2 2.45 8.1 2.43

-4.4 -5.0 10.2 2.74 10.0 2.71 9.8 2.67 9.7 2.63 9.7 2.60 9.0 2.47 8.3 2.28

-1.8 -2.5 10.7 2.78 10.5 2.74 10.4 2.67 10.0 2.63 9.7 2.52 9.0 2.34 8.3 2.15

2.8 2.0 11.4 2.85 11.0 2.71 10.4 2.45 10.0 2.41 9.7 2.32 9.0 2.12 8.3 1.90

6.0 5.0 11.7 2.80 11.0 2.60 10.4 2.30 10.0 2.25 9.7 2.12 9.0 1.97 8.3 1.75

7.0 6.0 11.7 2.76 11.0 2.56 10.4 2.23 10.0 2.19 9.7 2.08 9.0 1.90 8.3 1.69

8.6 7.5 11.7 2.67 11.0 2.47 10.4 2.17 10.0 2.12 9.7 2.04 9.0 1.84 8.3 1.62

11.2 10.0 11.7 2.54 11.0 2.32 10.4 2.04 10.0 1.99 9.7 1.90 9.0 1.71 8.3 1.49

16.4 15.0 11.7 2.30 11.0 2.08 10.4 1.77 10.0 1.73 9.7 1.64 9.0 1.49 8.3 1.23

Outdoor
air temp.

DB WB kW kW kW kW kW kW kW kW kW kW kW kW kW kW

-19.8 -20.0 6.1 1.99 6.0 1.97 5.8 1.95 5.7 1.92 5.6 1.90 5.4 1.86 5.3 1.82

-14.7 -15.0 7.0 2.10 6.8 2.08 6.7 2.05 6.6 2.01 6.5 1.99 6.3 1.97 6.1 1.94

-9.6 -10.0 8.0 2.19 7.8 2.17 7.6 2.16 7.5 2.12 7.4 2.08 7.2 2.06 7.1 2.05

-4.4 -5.0 8.9 2.30 8.8 2.29 8.6 2.25 8.5 2.21 8.4 2.19 7.9 2.08 7.3 1.92

-1.8 -2.5 9.4 2.34 9.2 2.30 9.1 2.25 8.8 2.21 8.4 2.12 7.9 1.97 7.3 1.81

2.8 2.0 10.0 2.40 9.6 2.29 9.1 2.06 8.8 2.03 8.4 1.95 7.9 1.79 7.3 1.60

6.0 5.0 10.2 2.36 9.6 2.19 9.1 1.94 8.8 1.90 8.4 1.79 7.9 1.66 7.3 1.47

7.0 6.0 10.2 2.32 9.6 2.16 9.1 1.88 8.8 1.84 8.4 1.75 7.9 1.60 7.3 1.42

8.6 7.5 10.2 2.25 9.6 2.08 9.1 1.82 8.8 1.79 8.4 1.71 7.9 1.55 7.3 1.36

11.2 10.0 10.2 2.14 9.6 1.95 9.1 1.71 8.8 1.68 8.4 1.60 7.9 1.44 7.3 1.25

16.4 15.0 10.2 1.94 9.6 1.75 9.1 1.49 8.8 1.46 8.4 1.38 7.9 1.25 7.3 1.03

Outdoor
air temp.

DB WB kW kW kW kW kW kW kW kW kW kW kW kW kW kW

-19.8 -20.0 5.3 1.68 5.1 1.66 5.0 1.65 4.9 1.62 4.8 1.60 4.7 1.57 4.5 1.54

-14.7 -15.0 6.0 1.77 5.9 1.76 5.7 1.73 5.6 1.70 5.6 1.68 5.4 1.66 5.3 1.63

-9.6 -10.0 6.8 1.85 6.7 1.84 6.5 1.82 6.5 1.79 6.3 1.76 6.2 1.74 6.1 1.73

-4.4 -5.0 7.7 1.94 7.5 1.93 7.4 1.90 7.3 1.87 7.2 1.85 6.8 1.76 6.2 1.62

-1.8 -2.5 8.0 1.98 7.9 1.94 7.8 1.90 7.5 1.87 7.2 1.79 6.8 1.66 6.2 1.52

2.8 2.0 8.6 2.02 8.3 1.93 7.8 1.74 7.5 1.71 7.2 1.65 6.8 1.51 6.2 1.35

6.0 5.0 8.8 1.99 8.3 1.85 7.8 1.63 7.5 1.60 7.2 1.51 6.8 1.40 6.2 1.24

7.0 6.0 8.8 1.96 8.3 1.82 7.8 1.59 7.5 1.56 7.2 1.48 6.8 1.35 6.2 1.20

8.6 7.5 8.8 1.90 8.3 1.76 7.8 1.54 7.5 1.51 7.2 1.45 6.8 1.31 6.2 1.15

11.2 10.0 8.8 1.80 8.3 1.65 7.8 1.45 7.5 1.42 7.2 1.35 6.8 1.21 6.2 1.06

16.4 15.0 8.8 1.63 8.3 1.48 7.8 1.26 7.5 1.23 7.2 1.17 6.8 1.06 6.2 0.87

15.0 17.0 19.0 20.0 21.0 23.0 25.0

TC PI TC PI TC PI TC PI TC PI TC PI TC PI

TC PI TC PI TC PI TC PI TC PI TC PI TC PI

15.0 17.0 19.0 25.0

TC PI TC PI TC PI TC PI TC PI TC PI TC PI

Indoor air temp. : °CDB

Indoor air temp. : °CDB

20.0 21.0 23.0

Indoor air temp. : °CDB

20.0 21.0 23.0

TC: Total capacity (kW), PI: Power input (kW)

25.015.0 17.0 19.0

1

2

3

Combination(%):

Indoor/outdoor

capacity ratio

50% 0.8 0.0 7.0 1.65 6.9 1.62 6.5 1.48 6.3 1.46 6.0 1.39 5.6 1.29 5.2 1.17

Outdoor
air temp.

DB WB kW kW kW kW kW kW kW kW kW kW kW kW kW kW

-19.8 -20.0 4.4 1.37 4.3 1.36 4.1 1.34 4.1 1.32 4.0 1.31 3.9 1.28 3.8 1.25

-14.7 -15.0 5.0 1.44 4.9 1.43 4.8 1.41 4.7 1.38 4.6 1.37 4.5 1.36 4.4 1.33

-9.6 -10.0 5.7 1.51 5.6 1.50 5.4 1.48 5.4 1.46 5.3 1.43 5.1 1.42 5.1 1.41

-4.4 -5.0 6.4 1.58 6.3 1.57 6.1 1.55 6.1 1.52 6.0 1.51 5.6 1.43 5.2 1.32

-1.8 -2.5 6.7 1.61 6.6 1.58 6.5 1.55 6.3 1.52 6.0 1.46 5.6 1.36 5.2 1.24

2.8 2.0 7.1 1.65 6.9 1.57 6.5 1.42 6.3 1.39 6.0 1.34 5.6 1.23 5.2 1.10

6.0 5.0 7.3 1.62 6.9 1.51 6.5 1.33 6.3 1.31 6.0 1.23 5.6 1.14 5.2 1.01

7.0 6.0 7.3 1.60 6.9 1.48 6.5 1.29 6.3 1.27 6.0 1.20 5.6 1.10 5.2 0.98

8.6 7.5 7.3 1.55 6.9 1.43 6.5 1.25 6.3 1.23 6.0 1.18 5.6 1.06 5.2 0.94

11.2 10.0 7.3 1.47 6.9 1.34 6.5 1.18 6.3 1.15 6.0 1.10 5.6 0.99 5.2 0.86

16.4 15.0 7.3 1.33 6.9 1.20 6.5 1.03 6.3 1.00 6.0 0.95 5.6 0.86 5.2 0.71

15.0 17.0 19.0 20.0 21.0 23.0 25.0

TC PI TC PI TC PI TC PI TC PI TC PI TC PI

Indoor air temp. : °CDB

8 - 5

4

5

6

7

8

1. Capacity Ratio of Outdoor Unit

1-3. U-52LE1U6, U-52LE1U6E (Cooling)

MINI VRF Capacity Ratio 50-130%

Combination(%):

Indoor/outdoor

capacity ratio

130% 20.0 14.0 2.49 15.2 2.81 16.3 3.14 17.5 3.48 18.7 3.98 19.8 4.33 21.0 4.48

Outdoor

air temp.

°CDB

-10.0 14.0 1.64 15.2 1.94 16.3 2.19 17.5 2.49 18.7 2.59 19.8 2.89 21.0 3.09

-5.0 14.0 1.69 15.2 1.99 16.3 2.24 17.5 2.59 18.7 2.74 19.8 3.04 21.0 3.19

0.0 14.0 1.79 15.2 2.09 16.3 2.34 17.5 2.69 18.7 2.94 19.8 3.23 21.0 3.33

5.0 14.0 1.89 15.2 2.19 16.3 2.49 17.5 2.84 18.7 3.14 19.8 3.43 21.0 3.53

10.0 14.0 2.04 15.2 2.34 16.3 2.64 17.5 2.99 18.7 3.28 19.8 3.63 21.0 3.73

15.0 14.0 2.24 15.2 2.56 16.3 2.89 17.5 3.19 18.7 3.63 19.8 3.98 21.0 4.08

25.0 14.0 2.79 15.2 3.14 16.3 3.48 17.5 3.88 18.7 4.48 19.8 4.83 20.7 4.78

30.0 14.0 3.19 15.2 3.53 16.3 3.88 17.5 4.38 18.7 4.68 19.6 4.88 20.3 5.08

35.0 14.0 3.73 15.2 4.13 16.3 4.53 17.5 4.98 18.2 5.08 18.9 5.23 19.6 5.37

40.0 14.0 4.38 15.2 4.78 16.3 5.18 15.8 5.33 17.0 5.37 17.9 5.52 18.4 5.72

43.0 14.0 4.98 14.0 5.28 14.0 5.37 14.0 5.47 15.8 5.62 16.8 5.72 17.5 5.87

16.0 17.0 18.0 19.0 20.0 21.0 22.0

TC PI TC PI TC PI TC PI TC PI TC PI TC PI

kW kW kW kW kW kW kW kW kW kW kW kW kW kW

Capacity Table

TC: Total capacity (kW), PI: Power input (kW)

Indoor air temp. : °CWB

1

2

3

4

5

6

Combination(%):

Indoor/outdoor

capacity ratio

120% 20.0 13.5 2.42 14.6 2.74 15.7 3.05 16.9 3.39 18.0 3.88 19.1 4.22 20.2 4.36

Combination(%):

Indoor/outdoor

capacity ratio

110% 20.0 13.0 2.35 14.1 2.66 15.2 2.97 16.3 3.29 17.3 3.77 18.4 4.10 19.5 4.24

Combination(%):

Indoor/outdoor

capacity ratio

100% 20.0 12.4 2.29 13.4 2.58 14.5 2.88 15.5 3.20 16.5 3.66 17.6 3.98 18.6 4.11

Outdoor

air temp.

°CDB

-10.0 13.5 1.60 14.6 1.89 15.7 2.13 16.9 2.42 18.0 2.52 19.1 2.81 20.2 3.01

-5.0 13.5 1.65 14.6 1.94 15.7 2.18 16.9 2.52 18.0 2.67 19.1 2.96 20.2 3.10

0.0 13.5 1.75 14.6 2.04 15.7 2.28 16.9 2.62 18.0 2.86 19.1 3.15 20.2 3.25

5.0 13.5 1.84 14.6 2.13 15.7 2.42 16.9 2.76 18.0 3.05 19.1 3.35 20.2 3.44

10.0 13.5 1.99 14.6 2.28 15.7 2.57 16.9 2.91 18.0 3.20 19.1 3.54 20.2 3.64

15.0 13.5 2.18 14.6 2.50 15.7 2.81 16.9 3.10 18.0 3.54 19.1 3.88 20.2 3.98

25.0 13.5 2.72 14.6 3.05 15.7 3.39 16.9 3.78 18.0 4.36 19.1 4.70 19.9 4.65

30.0 13.5 3.10 14.6 3.44 15.7 3.78 16.9 4.27 18.0 4.56 18.9 4.75 19.6 4.95

35.0 13.5 3.64 14.6 4.02 15.7 4.41 16.9 4.85 17.5 4.95 18.2 5.09 18.9 5.24

40.0 13.5 4.27 14.6 4.65 15.7 5.04 15.2 5.19 16.4 5.24 17.2 5.38 17.7 5.58

43.0 13.5 4.85 13.5 5.14 13.5 5.24 13.5 5.33 15.2 5.48 16.2 5.58 16.9 5.72

Outdoor

air temp.

°CDB

-10.0 13.0 1.55 14.1 1.84 15.2 2.07 16.3 2.35 17.3 2.45 18.4 2.73 19.5 2.92

-5.0 13.0 1.60 14.1 1.88 15.2 2.12 16.3 2.45 17.3 2.59 18.4 2.87 19.5 3.01

0.0 13.0 1.69 14.1 1.98 15.2 2.21 16.3 2.54 17.3 2.78 18.4 3.06 19.5 3.15

5.0 13.0 1.79 14.1 2.07 15.2 2.35 16.3 2.68 17.3 2.97 18.4 3.25 19.5 3.34

10.0 13.0 1.93 14.1 2.21 15.2 2.49 16.3 2.82 17.3 3.11 18.4 3.44 19.5 3.53

15.0 13.0 2.12 14.1 2.42 15.2 2.73 16.3 3.01 17.3 3.44 18.4 3.77 19.5 3.86

25.0 13.0 2.64 14.1 2.97 15.2 3.29 16.3 3.67 17.3 4.24 18.4 4.57 19.2 4.52

30.0 13.0 3.01 14.1 3.34 15.2 3.67 16.3 4.14 17.3 4.42 18.2 4.61 18.9 4.80

35.0 13.0 3.53 14.1 3.91 15.2 4.28 16.3 4.71 16.9 4.80 17.6 4.94 18.2 5.08

40.0 13.0 4.14 14.1 4.52 15.2 4.90 14.6 5.04 15.8 5.08 16.6 5.22 17.1 5.41

43.0 13.0 4.71 13.0 4.99 13.0 5.08 13.0 5.18 14.6 5.32 15.6 5.41 16.3 5.55

Outdoor

air temp.

°CDB

-10.0 12.4 1.51 13.4 1.78 14.5 2.01 15.5 2.29 16.5 2.38 17.6 2.65 18.6 2.83

-5.0 12.4 1.55 13.4 1.83 14.5 2.06 15.5 2.38 16.5 2.51 17.6 2.79 18.6 2.92

0.0 12.4 1.65 13.4 1.92 14.5 2.15 15.5 2.47 16.5 2.70 17.6 2.97 18.6 3.06

5.0 12.4 1.74 13.4 2.01 14.5 2.29 15.5 2.60 16.5 2.88 17.6 3.15 18.6 3.24

10.0 12.4 1.87 13.4 2.15 14.5 2.42 15.5 2.74 16.5 3.02 17.6 3.34 18.6 3.43

15.0 12.4 2.06 13.4 2.35 14.5 2.65 15.5 2.92 16.5 3.34 17.6 3.66 18.6 3.75

25.0 12.4 2.56 13.4 2.88 14.5 3.20 15.5 3.56 16.5 4.11 17.6 4.43 18.3 4.39

30.0 12.4 2.92 13.4 3.24 14.5 3.56 15.5 4.02 16.5 4.30 17.4 4.48 18.0 4.66

35.0 12.4 3.43 13.4 3.79 14.5 4.16 15.5 4.57 16.1 4.66 16.7 4.80 17.4 4.94

40.0 12.4 4.02 13.4 4.39 14.5 4.75 14.0 4.89 15.0 4.94 15.8 5.07 16.3 5.26

43.0 12.4 4.57 12.4 4.84 12.4 4.94 12.4 5.03 14.0 5.16 14.9 5.26 15.5 5.39

16.0 17.0 18.0 19.0 20.0 21.0 22.0

TC PI TC PI TC PI TC PI TC PI TC PI TC PI

kW kW kW kW kW kW kW kW kW kW kW kW kW kW

16.0 17.0 18.0 19.0 20.0 21.0 22.0

TC PI TC PI TC PI TC PI TC PI TC PI TC PI

kW kW kW kW kW kW kW kW kW kW kW kW kW kW

16.0 17.0 18.0 19.0 20.0 21.0 22.0

TC PI TC PI TC PI TC PI TC PI TC PI TC PI

kW kW kW kW kW kW kW kW kW kW kW kW kW kW

Indoor air temp. : °CWB

Indoor air temp. : °CWB

Indoor air temp. : °CWB

7

8

Combination(%):

Indoor/outdoor

capacity ratio

90% 20.0 11.2 1.92 12.1 2.17 13.0 2.42 14.0 2.69 14.9 3.07 15.8 3.34 16.7 3.45

Outdoor

air temp.

°CDB

-10.0 11.2 1.27 12.1 1.50 13.0 1.69 14.0 1.92 14.9 2.00 15.8 2.23 16.7 2.38

-5.0 11.2 1.31 12.1 1.54 13.0 1.73 14.0 2.00 14.9 2.11 15.8 2.34 16.7 2.46

0.0 11.2 1.38 12.1 1.61 13.0 1.80 14.0 2.07 14.9 2.26 15.8 2.50 16.7 2.57

5.0 11.2 1.46 12.1 1.69 13.0 1.92 14.0 2.19 14.9 2.42 15.8 2.65 16.7 2.73

10.0 11.2 1.57 12.1 1.80 13.0 2.03 14.0 2.30 14.9 2.53 15.8 2.80 16.7 2.88

15.0 11.2 1.73 12.1 1.98 13.0 2.23 14.0 2.46 14.9 2.80 15.8 3.07 16.7 3.15

25.0 11.2 2.15 12.1 2.42 13.0 2.69 14.0 2.99 14.9 3.45 15.8 3.72 16.5 3.69

30.0 11.2 2.46 12.1 2.73 13.0 2.99 14.0 3.38 14.9 3.61 15.6 3.76 16.2 3.92

35.0 11.2 2.88 12.1 3.19 13.0 3.49 14.0 3.84 14.5 3.92 15.1 4.03 15.6 4.15

40.0 11.2 3.38 12.1 3.69 13.0 3.99 12.6 4.11 13.5 4.15 14.2 4.26 14.6 4.41

43.0 11.2 3.84 11.2 4.07 11.2 4.15 11.2 4.22 12.6 4.34 13.4 4.41 14.0 4.53

16.0 17.0 18.0 19.0 20.0 21.0 22.0

TC PI TC PI TC PI TC PI TC PI TC PI TC PI

kW kW kW kW kW kW kW kW kW kW kW kW kW kW

Indoor air temp. : °CWB

8 - 6