Sanyo DHX4852 User Manual

OUTDOOR MODEL No. PRODUCT CODE No. APPLICABLE INDOOR MODEL No. V/ø/Hz

CHDX09053 85403301 AHX,UHX,KHX 0752

CHDX14053 85403302 AHX,KHX 0952 OUTDOOR

XHX,AHX,UHX,THX,KHX 1252 208-230/3ø/60

XHX,UHX,THX,KHX 1852

XHX,UHX,THX,KHX 2452 INDOOR

XHX,UHX,DHX 3652 208-230/1ø/60

DHX 4852

85464869238002

REFERENCE NO.

TD831138-02

i

Check of Density Limit

NO TE

Outdoor unit

Refrigerant tubing

Indoor unit

e.g., charged
amount (353 oz)

Outdoor unit

Indoor unit

Room A Room B Room C Room D Room E Room F

e.g., charged
amount (529 oz)

Refrigerant tubing

Outdoor unit

Very
small
room

Indoor unit

Small
room

Medium
room

Large room

Mechanical ventilation device – Gas leak detector

0 0

57

114

170

227

284

341

398

454

0

500

1000

1500

2000

2500

3000

3500

4000

400200 600 800 1000 1200

Total amount of refrigerant

Min. indoor volume

Min. indoor floor area

(when the ceilin

g

is 8.8 ft. hi

g

h)

ft.

3

ft.

2

oz

Range above
the density limit of

0.3 oz/ft.

3

(countermeasures
needed)

Range below
the density limit of

0.3 oz/ft.

3

(countermeasures
not needed)

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).
In a room where the density may exceed the limit, create
an opening with adjacent rooms, or install mechanical
ventilation combined with a gas leak detection device.
The density is as given below.

2. The standards for minimum room volume are as fol­lows.

(1) No partition (shaded portion)

(2) When there is an effective opening with the adjacent

room for ventilation of leaking refrigerant gas (open­ing without a door, or an opening 0.15% or larger
than the respective floor spaces at the top or bottom
of the door).

(3) If an indoor unit is installed in each partitioned room

and the refrigerant tubing is interconnected, the
smallest room of course becomes the object. But
when mechanical ventilation is installed interlocked
with a gas leakage detector in the smallest room
where the density limit is exceeded, the volume of the
next smallest room becomes the object.

Total amount of refrigerant (lbs)

Min. volume of the indoor unit installed room (ft.3)

<

Density limit (oz/ft.3)

The density limit of refrigerant which is used in multi air
conditioners is 0.3 oz/ft.3 (ISO 5149).

1.If there are 2 or more refrigerating systems in a single
refrigerating device, the amount of refrigerant should be
as charged in each independent device.

For the amount of charge in this example:

The possible amount of leaked refrigerant gas in
rooms A, B and C is 353 oz.
The possible amount of leaked refrigerant gas in
rooms D, E and F is 529 oz.

3. The minimum indoor floor space compared with the
amount of refrigerant is roughly as follows: (When the
ceiling is 8.8 ft. high)

ii

Contents

Section 1: OUTLINE OF W-2WAY ECO-i SYSTEM ................................................................1-1

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

2. Features of W-2WAY ECO-i SYSTEM .............................................................1-4

Section 2: DESIGN OF W-2WAY ECO-i SYSTEM ..................................................................2-1

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

2. System Design ...............................................................................................2-17

3. Electrical Wiring .............................................................................................2-23

4. Installation Instructions ..................................................................................2-27

Section 3: Control of W-2WAY ECO-i SYSTEM .....................................................................3-1

1. Main Operating Functions ................................................................................3-3

2. Wireless Remote Controller .............................................................................3-5

3. Timer Remote Controller................................................................................3-22

4. System Controller ..........................................................................................3-38

5. Simplified Remote Controller .........................................................................3-56

6. Remote Sensor ..............................................................................................3-64

Section 4: W-2WAY ECO-i SYSTEM UNIT SPECIFICATIONS ..............................................4-1

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

2. 4-Way Air Discharge Semi-concealed Type (X Type) .....................................4-12

3. 1-Way Air Discharge Semi-concealed Type (A Type) .....................................4-24

4. Concealed Duct Type (U Type) .......................................................................4-33

5. Concealed Duct High-Static Pressure Type (D Type) .....................................4-50

6. Ceiling-Mounted Type (T Type) ......................................................................4-57

7. Wall-Mounted Type (K Type) ..........................................................................4-66

Section 5: TEST RUN ..............................................................................................................5-1

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

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

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

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

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

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

7. Meaning of Alarm Messages .........................................................................5-14

Section 6: ELECTRICAL DATA ...............................................................................................6-1

1. Outdoor Unit ....................................................................................................6-2

2. Indoor Unit .......................................................................................................6-6

Section 7: PCB AND FUNCTIONS .........................................................................................7-1

1. Outdoor Unit Control PCB ...............................................................................7-2

2. Indoor Unit Control PCB Switches and Functions ...........................................7-6

iii

Outline of W-2Way ECO-i SYSTEM

1

2

3

4

5

6

7

8

Contents

1. OUTLINE OF W-2Way ECO-i MULTI SYSTEM

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

2. Features of W-2WAY ECO-i SYSTEM .................................................................................1-4

1-1

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1. Line-up

Capacity: BTU/h
(kW)

Cooling

/

Heating

Type

97 12 18 24 36 48

XHX1252 XHX1852 XHX2452 XHX3652

KHX0952 KHX1252 KHX2452KHX1852

AHX0952 AHX1252

THX1852THX1252 THX2452

UHX0752 UHX1252 UHX1852 UHX2452

DHX4852

Wall-Mounted
Type
(K Type)

Concealed Duct
Type
(U Type)

7,500 (2.2)

8,500 (2.5)

/

9,600 (2.8)

11,000 (3.2)

/

12,000 (3.6)

14,000 (4.2)

/

36,000 (10.6)

39,000(11.4)

/

47,800 (14.0)

54,600(16.0)

/

25,000 (7.3)

27,000(8.0)

/

19,000 (5.6)

21,000(6.3)

/

KHX0752

AHX0752

4-Way Air
Discharge Semi­Concealed Type
(X Type)

Ceiling-Mounted
Type

(T Type)

1-Way Air
Discharge Semi­Concealed Type

(A Type)

Concealed Duct
High-Static Pressure
Type(D Type)

DHX3652

UHX3652

Indoor units

Outline of W-2Way ECO-i SYSTEM

1-2

1

2

3

4

5

6

7

8

1-3

Outline of W-2Way ECO-i SYSTEM

1

2

3

4

5

6

7

8

1. Line-up

Type

Type

90

Capacity: BTU/h (kW)

95,500 (28.0)

Cooling / Heating / 107,500 (31.5)

Outdoor Unit

Capacity: BTU/h (kW)
Cooling / Heating

Outdoor Unit

CHDX14053

CHDX09053

153,600 (45.0)

140

/ 170,600 (50.0)

Air direction

Air direction

2-11/64

8-47/64

13-5/16

18-5/8

4-39/64

2-59/64

6-15/16

31-19/64

65-25/32

(8-1/2)

74-19/64

2-11/64

8-47/64

13-5/16

18-5/8

4-39/64

2-59/64

6-15/16

31-19/64

65-25/32

(8-1/2)

74-19/64

Outdoor units

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

ADDITION

CONCENTRATION

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

* The capacity after the setting

must not exceed 32 PS.

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

Maximum number of combined outdoor units

Maximum horsepower of combined outdoor units

Maximum number of connectable indoor units

Indoor/outdoor unit capacity ratio

Maximum actual tubing length

Maximum level difference (when outdoor unit is lower)

Maximum total tubing length

2

32 HP

40

50~130%

492 ft

164 (131) ft

984 ft

System limitations

CONNECTION

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

*If addi tional i nst allat ion of outd oor and ind oor u nit s is

exp ect ed, the sizeof refr igera nt tube sho uld be d ecided
accordin g to the to tal c apa city aft er the a ddi tion.

 Combination of outdoor units

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

CAUTION

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

1

1

2

10
16

10

16

20 26 32

Total horse

power

Inverter unit

Combination of outdoor units

1

2

1



2. Features of W-2WAY ECO-i SYSTEM

2-1. Outline of W-2WAY ECO-i SYSTEM

System example

Outline of W-2Way ECO-i SYSTEM

1-4

2. Features of W-2WAY ECO-i SYSTEM

Dimensions

10HP CHDX09053
16HP CHDX14053

Air direction

(Ceiling panel dimensions)

10,16 HP

Air direction

Air direction

31-7/64

(Installation hole pitch)

35-3/64

Top view

Outline of W-2Way ECO-i SYSTEM

Air direction

(Maximum dimensions)

(Installation hole pitch)

(Ceiling panel dimensions)

36-7/32

37-13/32

35-3/64

Unit: in.

Dimensions of unit combinations

20,26,32 HP

74-1/64 (Ceiling panel dimensions)

35-3/64 (Ceiling panel dimensions) 35-3/64 (Ceiling panel dimensions)

35-3/64 (Ceiling panel dimensions)

31-7/64 (Installation hole pitch)

70-5/64 (Installation hole pitch)

31-7/64 (Installation hole pitch)

Top view

36-7/32 (Installation hole pitch)

37-13/32 (Maximum dimensions)

Unit: in.

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2

3

4

5

1-5

6

7

8

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

In case of 32 HP system

Capacity

32

28

24

20

16

12

8

4

DC1

DC2

AC11

AC21

AC12

AC22

DC1

DC1

DC2

AC11

DC1

DC2

AC11

AC21

DC1

DC2

AC11

AC21

AC12

DC2

DC1

DC2

LOAD --->

Example of 2 unit connection

DC1

AC11

AC12

Unit 1

DC2

AC21

AC22

Unit 2

DC3

AC31

AC32

Unit 3

Outline of W-2Way ECO-i SYSTEM

2. Features of W-2WAY ECO-i SYSTEM

Capacity control

The compressor combination (DC inverter compressor + constant-speed compressor) allows smooth capacity control from 0.8
HP to 32 HP.

Realization of smooth capacity control
from 0.8HP to 32HP

Capacity control is possible smoothly with a DC
inverter compressor.The right graph shows the
image of the operating combination of compres­sors in case of 32HP system.In actual operation,
the combination will be changed by operationg
condition, operating time amount, priority of com­pressor and so on.

Comp. HP Unit1(main) Unit2(sub1)

DC comp. 4.0 4.0

AC1 comp. 6.0 6.0

AC2 comp. 6.0 6.0

*32HP = CHDX14053 Type x2

1-6

Design of W-2WAY ECO-i SYSTEM Unit Specifications

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Contents

2. DESIGN OF W-2WAY ECO-i SYSTEM

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

2. System Design ..................................................................................................................2-17

3. Electrical Wiring ................................................................................................................2-23

4. Installation Instructions ...................................................................................................2-27

2-1

Design of W-2WAY ECO-i SYSTEM Unit Specifications

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2

3

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1

2

3

4

5

6

7

8

50

14

23

32

41

50

59

68

77

86

95

104

113

Indoor air intake temp.

°

F (WB)

Outdoor air intake temp.

°

F (DB)

59

57

109

68 77 86

Operating
range

50

5

-4

14

23

32

41

50

59

68

77

Indoor air intake temp.

°

F (DB)

Outdoor air intake temp. °F (WB)

59 68 77 86 95

Operating
range

Cooling

Heating

1. Model Selecting and Capacity Calculator

1-1. Operating Range

2-2

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2-3

Design of W-2WAY ECO-i SYSTEM Unit Specifications

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

Calculation of the indoor air-conditioning load

●

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

Selection of an air conditioning system

●

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

Design of the control system

●

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

Preliminary selection of indoor and outdoor units

●

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

........

2-4 ~ 2-10

Check of the tubing length and elevation difference

●

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

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

2-4

Calculation of the corrected outdoor unit capacity

●

Capacity correction coefficient for model.................................................................... 2-11, 13, 14

●

Capacity correction coefficient for outdoor temperature conditions ..................................2-11, 13

●

Capacity correction coefficient for tubing length and elevation difference ........................ 2-11, 14

●

Heating capacity correction coefficient for frosting/defrosting .......................................... 2-11, 13

Calculation of the corrected capacity for each indoor unit

●

Capacity correction coefficient for indoor temperature conditions .................................... 2-11, 14

●

Capacity distribution ratio based on the tubing length and elevation difference .............. 2-11, 14

Calculation of the actual capacity for each indoor unit

●

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

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

2-11 ~ 2-14

●

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

late the actual capacity for each indoor unit. .......................................................................... 2-12

Recheck of the actual capacity for each indoor unit

●

If the capacity is inadequate, reexamine the unit combinations.

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

Example 2: Increasing the indoor unit capacity ...................................................................... 2-19

●

Increasing the tubing size ...................................................................................................... 2-20

Design of tubing

●

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

possible. .......................................................................................................................... 2-4 ~ 2-6

●

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

●

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

●

Increasing the tubing size of the wide tubes can reduce the loss of capacity caused by longer
tubing lengths. (Only the main wide tube with the largest tube diameter (main tube LA and main
tubes after the distribution point that are the same size as LA) can be changed.) In this case, it is

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

2-20

Calculation of additional refrigerant charge amount

●

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

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

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

Design of electrical wiring capacity

●

Select a wiring capacity according to the method of power supply. ...................................... 2-24

1. Model Selecting and Capacity Calculator

1-2. Procedure for Selecting Models and Calculating Capacity

Model Selection Procedure

Design of W-2WAY ECO-i SYSTEM Unit Specifications

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R410A distribution joint
APR-CHP680BA (for outdoor unit)
APR-CHP680BA (for outdoor unit)
APR-CHP680BA (for outdoor unit)
APR-CHP680BA (for outdoor unit)
APR-P1350BA (for indoor unit)

Explanation of symbols

Distribution joint
(APR: purchased separately)

Solidly welded shut
(pinch weld)

Balance tubing
( 1/4")

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

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

Main tubing length LM = LA + LB … 262 ft

1.

2.

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

4.

Ball valve (field supply)

T-joint (field supply)

Note: Do not use commercially available T-joints for the liquid tubing and parts.
* Be sure to use special R410A distribution joints (APR: purchased separately) for outdoor unit connections and tubing branches.

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

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

Item Mark Contents Length (ft.)

L1 Max. tubing length

Actual length 492

Equivalent length 574

L (L2 – L4)

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

131

LM Max. length of main tubing (at max. diameter) 262

1, 2... 40

Max. length of each distribution tube 98

L1+ 1+ 2... 39+
A+LE+LF+LG

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

984

L5

L3

Distance between outdoor units

32

H1

When outdoor unit is installed higher than indoor unit 164
When outdoor unit is installed lower than indoor unit 131

H2

Max. difference between indoor units 49

H3 Max. difference between outdoor units

13

L = Length, H=Height

Allowable tubing
length

Allowable elevation
difference

*3

6.6

Allowable length of
joint tubing

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

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

2: If the longest tubing length (L1) exceeds 295 ft. (equivalent length), increase the sizes of the main tubes (LM) by 1 rank for gas
tubes and liquid tubes. (Use a field supply reducer.) (Select the tube size from the table of main tube sizes (Table 2-5) on the
following page (LA table), and from the table of refrigerant tubing sizes (Table 2-10) on the second following page.)

3: If the longest main tube length (LM) exceeds 164 ft., increase the main tube size at the portion before 164 ft. by 1 rank for the
gas tubes. (Use a field supply reducer.)
(For the portion that exceeds 164 ft., set based on the main tube sizes (LA) listed in the table on the following page.)

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

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

change the size of the tubing to reduce the amount of refrigerant.

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

NOTE

L5

LA

LE

LM

LB LC

L2

L4

LF

LD L3

LG

H2

H3

H1

L1

2

3

1

5

4

A

B

38

39

40

For
extension

For
extension

Max. 1.3ft

Max. 1.3ft

1. Model Selecting and Capacity Calculator

1-3. Tubing Length

2-4

1

2

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2-5

Design of W-2WAY ECO-i SYSTEM Unit Specifications

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1. Model Selecting and Capacity Calculator

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

DC

(oz)

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

Table 2-3 Amount of Refrigerant Charge Per Meter, According to Liquid Tubing Size

Liquid tubing size Amount of refrigerant

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

ø1/4" (ø6.35) 0.279

ø3/8" (ø9.52) 0.602

ø1/2" (ø12.7) 1.38

ø5/8" (ø15.88) 1.99

ø3/4" (ø19.05) 2.78

ø7/8" (ø22.22) 3.93

CHDX09053 CHDX14053

423 458

Required amount of charge = (Amount of refrigerant charge per

meter of each size of liquid tube × its tube length) + (...) + (...)

* Always charge accurately using a scale for weighing.

* If the existing tubing is used, and the amount of on-site additional

refrigerant charge exceeds the value listed below, then change the

size of the tubing to reduce the amount of refrigerant.

Max. additional charge for 1 outdoor unit : 62 lbs

Max. additional charge for 2 outdoor units : 111 lbs

Table 2-4 System Limitations

Max. No. allowable connected outdoor units 2

Max. capacity allowable connected outdoor units 307,100 BTU/h (32 hp, 90 kW)

Max. connectable indoor units 40

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

*1: Up to 2 units can be connected if the system has been extended.

*1

1

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32

249,100

(73.0)

26

ø7/8"

(ø22.22)

10

95,500

(28.0)

ø1/2"

(ø12.7)

153,600

(45.0)

16

ø1-1/8"

(ø28.58)

ø5/8"

(ø15.88)

10
10

16
10

16
16

191,100

(56.0)

20

ø3/4"

(ø19.05)

ø1-3/8"

(ø34.92)

ø3/8"

(ø9.52)

307,100

(90.0)

16 10

BTU/h

(kW)

Total system horsepower

Combined outdoor units

Gas tubing

Liquid tubing

ø3/4"

(ø19.05)

ø1-3/8"

(ø34.93)

ø5/8"

(ø15.88)

ø1-1/8"

(ø28.58)

ø1/2"

(ø12.7)

ø1-1/8"

(ø28.58)

ø3/8"

(ø9.52)

ø3/4"

(ø19.05)

ø3/8"

(ø9.52)

ø5/8"

(ø15.88)

ø3/8"

(ø9.52)

ø1/2"

(ø12.7)

Gas tubing

Liquid tubing

–

238,900

(25 hp)

178,800

(19 hp)

ø1/2"

(ø12.7)

ø1-1/8"

(ø28.58)

178,800

(19 hp)

143,300

(15 hp)

24,200

(2.5 hp)

24,200

(2.5 hp)

–

54,600

(6 hp)

54,600

(6 hp)

238,900

(25 hp)

76,800

(8.1 hp)

ø3/8"

(ø9.52)

ø7/8"

(ø22.22)

76,800

(8.1 hp)

102,400

(11 hp)

102,400

(11 hp)

Below BTU/h

Over BTU/h

143,300

(15 hp)

hp = horsepower

Tubing size

Total capacity
after distribution

Design of W-2WAY ECO-i SYSTEM Unit Specifications

1. Model Selecting and Capacity Calculator

1-4 Tubing Size

Table 2-5 Main Tubing Size (LA)

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

However extension is not possible if the resulting tubing size is two ranks higher.
*2: The balance tube (outdoor unit tube) diameter is ø1/4".
*3: Type 1 tubing should be used for the refrigerant tubes.
*4: If the length of the longest tube (L1) exceeds 295 ft. (equivalent length), increase the main tube (LM) size by 1 rank for the gas

and liquid tubes. (Use field-supply reducers.) (Select from Table 2-5 and Table 2-10.)
*5: If the longest main tube length (LM) exceeds 164 ft., increase the main tube size at the portion before 164 ft. by 1 rank for the

gas tubes.

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

Unit: in. (mm)

Size of tubing (lB) between outdoor units

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

Table 2-6 Main Tubing Size After Distribution (LB, LC...)

Note: In case the total capacity of connected indoor units exceeds the total capacity of the outdoor units, select the main tubing

size for the total capacity of the outdoor units. (Especially the main tubing segments of LA, LB and LF.)

Unit: in. (mm)

2-6

1

2

3

4

5

6

7

8

2-7

Design of W-2WAY ECO-i SYSTEM Unit Specifications

1

2

3

4

5

6

7

8

ø7/8"

(ø22.22)

ø3/8" (ø9.52)

ø1/4" (ø6.35)

95,500

(28.0)

153,600

(45.0)

ø1-1/8"

(ø28.58)

Flare connection

Brazing connection

ø1/2" (ø12.7)

Flare connection

( A – B)

Balance tubing

Liquid tubing

Gas tubing

BTU/h

(kW)

Balance tube

Liquid tube

Gas tube

ø5/8" (ø15.88)

ø3/8" (ø9.52) ø1/4" (ø6.35)

ø1/2" (ø12.7)

Gas tubing

Liquid tubing

Indoor unit type 7 9 12 18

24

36 48

1. Model Selecting and Capacity Calculator

Table 2-7 Amount of Refrigerant Charge

Liquid tubing size Amount of refrigerant

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

ø1/4" (ø6.35) 0.279

ø3/8" (ø9.52) 0.602

ø1/2" (ø12.7) 1.38

ø5/8" (ø15.88) 1.99

ø3/4" (ø19.05) 2.78

ø7/8" (ø22.22) 3.93

Table 2-8 Outdoor Unit Tubing Connection Size

Unit: in. (mm)

Table 2-9 Indoor Unit Tubing Connection Size

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

Table 2-10 Refrigerant tubing (Existing tubing can be used.)

Material O Material 1/2H • H

ø1/4" (ø6.35) t1/32" (0.8) ø7/8" (ø22.22) t5/128" (1.0)

ø3/8" (ø9.52) t1/32" (0.8) ø1" (ø25.40) t5/128" (1.0)

ø1/2" (ø12.7) t1/32" (0.8) ø1-1/8" (ø28.58) t5/128" (1.0)

ø5/8" (ø15.88) t5/128" (1.0) ø1-1/4" (ø31.75) t3/64" (1.1)

ø3/4" (ø19.05) over t5/128" (1.0) ø1-3/8" (ø34.93) over t3/64" (1.15)

Tubing size (in. (mm))

Unit: in. (mm)

* When bending the tubes, use a bending

radius that is at least 4 times the outer

diameter of the tubes.

In addition, take sufficient care to avoid

crushing or damaging the tubes when

bending them.

Design of W-2WAY ECO-i SYSTEM Unit Specifications

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

Wide tubing size (mm) 12.7 15.88 19.05 22.22 25.4 28.58 31.8 38.1

90o elbow 0.3 0.35 0.42

0.48

0.52 0.57 0.7

0.79

45o elbow 0.23 0.26 0.32

0.36

0.39 0.43 0.53 0.59

U-shape tube bent (R60 100 mm) 0.9 1.05 1.26 1.44 1.56 1.71 2.1

2.37

Trap bend

2.3

2.8 3.2 3.8 4.3 4.7 5.0

5.8

Y-branch distribution joint Equivalent length conversion not needed.

Ball valve for service Equivalent length conversion not needed.

Cooling
Heating

95

94

93

92

91

90

96

97

98

99

100

Capacity ratio based on Gas

tube diameter (%)

Recommended Gas tubes diameter (in)

ø3/4” ø7/8”

ø7/8” ø1-1/8”

ø1-1/8”

ø1-3/8”

ø1-3/8”

ø1”

10 12 14 16 18 20 26 30 35 40 45 46 47 48

Gas tubing size (in. (mm))

1/2"

(12.7)

5/8"

(15.88)

3/4"

(19.05)

7/8"

(22.22)

1"

(25.4)

1-1/8"

(28.58)

1-3/8"

(34.93)

90° elbow

1 1.1 1.4 1.6 1.7 1.9 2.5

45° elbow 0.8 0.9 1

1.2

1.3 1.4 1.8

U-shape tube bent (R2-3/8" – 4" (60 – 100)) 3 3.4 4.1 4.7 5.1 5.6 7.4

Trap bend

7.5 9.2 10.5 12.5 14.1 15.4 19.2

Y-branch distribution joint Equivalent length conversion not needed.

Ball valve for service Equivalent length conversion not needed.

1. Model Selecting and Capacity Calculator

Straight equivalent length of joints

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

Table 2-11 Straight Equivalent Length of Joints

Capacity loss caused by differences in tubing diameters

* Capacity loss will occur if a tubing system that matches the horsepower is not selected (for example, if a tubing system was

determined and installed with no plan for extension and extension occurs later). The loss rate can be found from the graph
below.

Unit: ft.

(Reading the graph)
<Example 1>
Currently a 16 HP system and ø1-1/8" Gas tubings are used. Subsequently the system is expanded, with 16 HP added to the

same tubing system.

Horsepower after extension: 16 + 16 = 32 HP
From the graph above: Cooling: Capacity ratio is 90.8%. Actual capacity = 32 × 0.908 = 29.1 HP

Heating: Capacity ratio is 96.0%. Actual capacity = 32 × 0.960 = 30.7 HP

2-8

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7

8

2-9

Design of W-2WAY ECO-i SYSTEM Unit Specifications

1

2

3

4

5

6

7

8

WARNING

CAUTION

WARNING

0 0

57

114

170

227

284

341

398

454

511

568

625

682

738

795

852

909

966

1022

1079

1136

0

500

1000

1500

2000

2500

3000

3500

4000

4500

5000

5500

6000

6500

7000

7500

8000

8500

9000

9500

10000

1000500 1500 2000 2500 3000

Total amount of refrigerant

Min. indoor volume

Min. indoor floor area

(when the ceilin

g

is 8.8 ft. hi

g

h)

ft.

3

ft.

2

oz

Range above
the density limit of

0.3 oz/ft.

3

(countermeasures
needed)

Range below

the density limit of

0.3 oz/ft.

3

(countermeasures

not needed)

1. Model Selecting and Capacity Calculator

Additional refrigerant charge amount

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

Table 2-12 Amount of Refrigerant Charge Per Meter, According to Liquid Tubing Size

Liquid tubing size Amount of refrigerant

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

ø1/4" (ø6.35) 0.279

ø3/8" (ø9.52) 0.602

ø1/2" (ø12.7) 1.38

ø5/8" (ø15.88) 1.99

ø3/4" (ø19.05) 2.78

ø7/8" (ø22.22) 3.93

Check of limit density

Required amount of charge = (Amount of refrigerant charge per

meter of each size of liquid tube × its tube length) + (...) + (...)

* Always charge accurately using a scale for weighing.

1-5. 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.
If the density could exceed the limit level, it is necessary to provide
an opening between the unit and the adjacent room, or to install
mechanical ventilation which is interlocked with a leak detector.

(Total refrigerant charged amount: oz)

(Min. indoor volume where the indoor unit is installed: ft.3)

<

The limit density of refrigerant R410A which is used in this unit is

0.3 oz/ft.3 (ISO 5149).

The shipped outdoor unit comes charged with the amount of refrig­erant fixed for each type, so add it to the amount that is charged in
the field. (For the refrigerant charge amount at shipment, refer to the
unit’s nameplate.)

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

Limit density 0.3 (oz/ft.3)

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

Minimum indoor volume & floor area as against the amount
of refrigerant is roughly as given in the following table.

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

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

t

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

×

(3) > 100%: Corrected cooling capacity for that indoor unit [5] = Rated cooling capacity for that indoor unit

If (2) ≥ 100%: Corrected cooling capacity for that indoor unit (5) = Rated cooling capacity for that indoor unit

×

(2)

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

t

Design of W-2WAY ECO-i SYSTEM Unit Specifications

1. Model Selecting and Capacity Calculator

1-6. Calculation of Actual Capacity of Indoor Unit

Calculating the actual capacity of each indoor unit

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

1. Outdoor unit capacity correction coefficient

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

(1) Capacity correction for the outdoor unit model

The capacity correction coefficient is 1.00.

(2) Capacity correction for the outdoor unit temperature conditions

From the graph of capacity characteristics on page 2-12, use the outdoor temperature to find the capacity correction coef­ficient.

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

From the graph of capacity change characteristics on page 2-13, use the tubing length and elevation difference to find the
capacity correction coefficient.
The outdoor unit correction coefficient is the value which corresponds to the most demanding indoor unit.

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

From the table on page 2-12, find the capacity correction coefficient.

2. Indoor unit capacity correction coefficients

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

(2) Capacity correction for the indoor unit temperature conditions

From the graph of capacity characteristics on page 2-13, use the indoor temperature to find the capacity correction coeffi­cient.

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

First, in the same way as for the outdoor unit, use the tubing length and elevation difference for each indoor unit to find the
correction coefficient from the graph of capacity change characteristics on page 2-13. Then divide the result by the outdoor
unit correction coefficient to find the capacity distribution ratio for each indoor unit.

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

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

<Cooling>

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

Page 2-12) × Correction coefficient for outdoor temperature conditions ((2)
Page 2-12) × Correction coefficient for tubing length and elevation difference
((3) Page 2-13)

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

capacity [5] is considered to be 100%.

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

indoor temperature conditions at that indoor unit ((2) Page 2-13) × Distribution ratio based on tubing length and elevation dif­ference at that indoor unit ((3) Page 2-13)

2-10

1

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2-11

Design of W-2WAY ECO-i SYSTEM Unit Specifications

1

2

3

4

5

6

7

8

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

1. Model Selecting and Capacity Calculator

<Heating>

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

Page 2-12) × Correction coefficient for outdoor temperature conditions ((2)
Page 2-12) × Correction coefficient for tubing length and elevation difference
((3) Page 2-13) × Correction coefficient for frosting/defrosting ((4) Page

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

capacity is considered to be 100%.

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

indoor temperature conditions at that indoor unit ((2) Page 2-13) × Distribution ratio based on tubing length and elevation

difference at that indoor unit.

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

from the appropriate conditions.

2-12)

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.)

<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.)

Design of W-2WAY ECO-i SYSTEM Unit Specifications

1

2

3

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5

6

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8

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

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

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

2.0

Indoor unit capacity correction coefficient

Corrected indoor/outdoor capacity ratio (Ruc or Ruh)

Outdoor unit cooling capacity
characteristics

Outdoor unit heating capacity
characteristics

Rate of cooling capacity change (%)

Rate of heating capacity change (%)

* Broken line indicates a 16 HP

DC inverter unit

Outdoor air intake temp. (°F DB)

WB = 66°F

Indoor air intake temp. (°F DB)

59

68

77

130
120

110

100

90
80
70
60
50
40

130

120

110

100

90

80

-4 5 14 23 32 41 50 5923 32 41 50 14 59 68 77 86 95 104 113

Outdoor air intake temp. (°F WB)

Indoor air intake temp. (WB) = 60°F

WB = 71°F

1. Model Selecting and Capacity Calculator

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

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

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

Outdoor intake air

(°FWB RH85%)

temp.

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

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

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

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

2-12

1

2

3

4

5

6

7

8

2-13

Design of W-2WAY ECO-i SYSTEM Unit Specifications

1

2

3

4

5

6

7

8

Rate of cooling capacity change (%)

Indoor unit cooling capacity characteristics Indoor unit heating capacity characteristics

indicates the rating point. indicates the rating point.

Indoor air intake temp. (°F WB)

Rate of heating capacity change (%)

Indoor air intake temp. (°F DB)

120

110

100

90

80

110

105

100

95

90

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

80

<Cooling>

Elevation difference (ft)

Base capacity
change rate

Elevation difference (ft)

*1

92 90 88 86 84 82 80 78 76

94

96

98

100
%

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

164

131

98

66

33

0

-33

-66

-98

-131

Equiv

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

alent length (ft)

Equivalent length (ft)

<Heating>

Base capacity
change rate

164

131

98

66

33

0

-33

-66

-98

-131

1. Model Selecting and Capacity Calculator

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

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

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.

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

tion tubes. Refer to Table 2-13 and make the appropriate changes. However be sure that the total length does not exceed the
maximum.
* The only sizes which can be increased are the LM (main tube with the largest diameter) gas tubes, and the changes are

limited to those shown in Table 2-13.
In addition, note that the additional refrigerant charge is determined only by the narrow-tube size.

Table 2-13 Equivalent Length Correction Coefficient when the Size of the Discharge Tubes and Suction Tubes (LM)

is Increased

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

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

Equivalent length correction
coefficient

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

2-13 and calculate the equivalent length of the LM section.

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

ø1/2"

(ø12.7)

ø5/8" ø3/4" ø7/8" ø1-1/8" ø1-3/8"

(ø15.88) (ø19.05) (ø22.22) (ø28.58) (ø34.93)

ø5/8"

(ø15.88) (ø19.05) (ø22.22) (ø28.58)

0.4 0.5 0.6

ø3/4" ø7/8" ø1-1/8"

Design of W-2WAY ECO-i SYSTEM Unit Specifications

1

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1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

<Cooling>

<Heating>

16HP

10HP

Indoor air intake temp. (°F DB)

59

68

77

59

68

77

Capacity ratio (%)

Input ratio (%)

130
120
110
100

90
80
70
60
50
40

130
120

110

100

90
80
70
60
50

– 4 5 14 23 32 41 50 59

Outdoor air intake temp. (°F WB)

Indoor air intake temp. (°F DB)

59

68

77

59

68

77

Capacity ratio (%)

Input ratio (%)

130
120
110
100

90
80
70
60
50
40

130
120

110

100

90
80
70
60
50

– 4 5 14 23 32 41 50 59

Outdoor air intake temp. (°F WB)

* Broken line indicates 16 HP DC inverter unit

Outdoor air intake temp. ( °F DB)

130

120

110

100

90

80

120

110

100

90

80

70

60

50

40

30

20

10

)
%

(
o

i

t
ar

y

t

i
cap

a
C

)
%( oitar tu

pn
I

14 23 32 41 50 59 68 77 86 95 104 113

WB = 66

°

F

Indoor air intake temp. (WB) = 71°F

WB = 60°F

Indoor air intak

e tem

p

.

(WB) = 71

°

F

WB = 66

°

F

WB = 60

°

F

1. Model Selecting and Capacity Calculator

1-7. Capacity Correction Graph According to Temperature Condition

Capacity characteristics

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

Heating capacity correction coefficients for frost/defrost operation

Outdoor intake air
temp.
(°F WB RH85%)

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

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

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

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

2-14

1

2

3

4

5

6

7

8

2-15

Design of W-2WAY ECO-i SYSTEM Unit Specifications

1

2

3

4

5

6

7

8

<Cooling>

Elevation difference (ft)

Base capacity
change rate

*1

92 90 88 86 84 82 80 78 76

94

96

98

100
%

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

164

131

98

66

33

0

–33

–66

–98

–131

Equivalent length (ft)

*1 Sample calculations

(System: 20 HP, 164ft equivalent length, 49ft elevation
difference

The cooling capacity and heating capacity for this system are
found as shown below.)

●

Cooling operation

From the table, the correction coefficient for that horsepower
level is found to be 1.00.
From the graph, the base capacity change rate is found to be

92.0%.

92.0%×1.00 = 92.0%

Capacity change rate is 92.0%.

(56.0kW×92.0% = 51.5kW)

92.0% = 175,800 BTU/h

Cooling capacity is
175,800 BTU/h (51.5 kW)

●

Heating operation

From the table, the correction coefficient for that horsepower
level is found to be 1.00.
From the graph, the base capacity change rate is found to be

97.2%.

97.2%

×

1.00 = 97.2%
Because the calculation result exceeds 97.2%, the capacity
change rate is 97.2%.

(63.0kW

×

97.2% = 61.2kW) Heating capacity is
209,000 BTU/h (61.2 kW)

Cooling Heating

Item

Model (SPW-)

Cooling
capacity
(kW)

Power
consumption
(kW)

Heating
capacity
(kW)

Power
consumption
(kW)

<50Hz models>

22.4

28.0

33.5

40.0

45.0

5.99

7.90

9.58

11.6

13.3

25.0

31.5

37.5

45.0

50.0

6.17

7.15

9.60

11.5

13.2

Equivalent length (ft)

<Heating>

Base capacity
change rate

164

131

98

66

33

0

–33

–66

–98

–131

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

Elevation difference (ft)

191,100 BTU/h

×

97.2% = 209,000 BTU/h215,000 BTU/h

×

1. Model Selecting and Capacity Calculator

Rated performance values

Type

1-8. Capacity Correction Graph According to Tubing Length and Elevation Difference

90 95,500(28.0) 27,000(7.90) 107,500(31.5) 26,500(7.75)

140 153,600(45.0) 45,400(13.3) 170,600(50.0) 45,000(13.2)

Item Cooling Heating

Cooling capacity

BTU/h(kW)

Capacity change characteristics

Power consumption

BTU/h(kW)

Heating capacity

BTU/h(kW)

Power consumption

BTU/h(kW)

NOTE

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

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Design of W-2WAY ECO-i SYSTEM Unit Specifications

1. Model Selecting and Capacity Calculator

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

by one rank.
However, the upper limit for the gas tube size is ø1-5/8".

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

Refer to Table 2-13 to increase the tubing size. However, the maximum allowable tubing length must not be exceeded.

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

Table 2-13 Correction coefficient for equivalent length when the size of the gas tube (LM) is increased

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

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

Equivalent length correction
coefficient

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

correction coefficient from Table 2-13 and calculate the equivalent length for section LM.

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

ø1/2"

(ø12.7)

ø5/8"

(ø15.88)

ø5/8"

(ø15.88)

ø3/4"

(ø19.05)

0.4 0.5 0.6

ø3/4"

(ø19.05)

ø7/8"

(ø22.22)

ø7/8"

(ø22.22)

ø1-1/8"

(ø28.58)

ø1-1/8"

(ø28.58)

ø1-3/8"

(ø34.93)

2-16

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Outdoor

unit 1

Indoor

unit 1

Indoor

unit 2

Indoor

unit 3

Indoor

unit 4

Outdoor

unit 2

Elevation
difference: 33 ft

164 ft

33 ft 33 ft 66 ft

33 ft 33 ft 33 ft

Design of W-2WAY ECO-i SYSTEM Unit Specifications

2. System Design

2-1. System Example

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

Selection conditions

Assumes that installation is in a 60 Hz region.

Outdoor unit

Cooling

Heating

Actual tubing length 291 ft 197 ft 230 ft 263 ft 296 ft

Equivalent length (with consideration
for curves, etc.)

Air condition (DB/WB) 91.0 / 72.0 78.0 / 64.0 78.0 / 64.0 78.0 / 64.0 78.0 / 64.0

Max. load (BTU/h) 40,000 40,000 30,000 18,000

Air condition (DB/WB) 37.0 / 35.0 69.0 / 55.0 69.0 / 55.0 69.0 / 55.0 69.0 / 55.0

Max. load (BTU/h) 46,000 46,000 35,000 23,000

365 ft 236 ft 276 ft 316 ft 355 ft

Room 1
(indoor unit 1)

Room 2
(indoor unit 2)

Room 3
(indoor unit 3)

Room 4
(indoor unit 4)

Preliminary selection

Outdoor unit

Selected model

Load (cooling/heating) (BTU/h) 40,000 40,000 30,000 18,000

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

(5) Corrected capacity (cooling/

heating) (BTU/h)

(7) Actual capacity

(cooling/heating) (BTU/h)

Type

09053+09053

191,000 /

215,000

159,600 /

156,100

Room 1
(indoor unit 1)

Type 4852 Type 4852 Type 3652 Type 1852

47,800 /

54,600

47,400 /

54,600

47,400 /

50,900

Room 2
(indoor unit 2)

47,800 /

54,600

46,300 /

54,600

46,300 /

50,900

Room 3
(indoor unit 3)

36,000 /

39,000

34,000 /

38,900

34,000 /

36,300

Room 4
(indoor unit 4)

19,000 /

21,000

17,500 /

20,600

17,500 /

19,200

Total corrected capacity of indoor units (cooling/heating) = 145,200/168,700
Ruc = 145,200/159,600 = 0.910 < 1 Ruh = 168,700/156,100 = 1.081 > 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.

Room 1
(indoor unit 1)

Type 4852 Type 4852 Type 3652 Type 1852

40,000 40,000 30,000 18,000

47,800 /

54,600

47,400 /

54,600

47,400 /

54,600

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)

Outdoor unit

Type

14053+09035

249,100 /

278,100

208,100 /

201,900

Total corrected capacity of all indoor units (cooling/heating) = 145,200/163,700
Ruc = 145,200/208,100 = 0.698 < 1 Ruh = 168,700/201,900 = 0.835 < 1

Room 2
(indoor unit 2)

2-17

47,800 /

54,600

46,300 /

54,600

46,300 /

54,600

Room 3
(indoor unit 3)

36,000 /

39,000

34,000 /

38,900

34,000 /

38,900

Room 4
(indoor unit 4)

19,000 /

21,000

17,500 /

20,600

17,500 /

20,600

Design of W-2WAY ECO-i SYSTEM Unit Specifications

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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) = 150,700/174,500
Ruc = 150,700/208,100 = 0.724 < 1 Ruh = 174,500/201,900 = 0.864 < 1

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

Type 14053+09053

249,100 / 278,100 47,800 / 54,600 47,800 / 54,600 36,000 / 39,000 25,000 / 27,000

208,100 / 201,900 47,400 / 54,600 46,300 / 54,600 34,000 / 38,900 23,000 / 26,400

Room 1
(indoor unit 1)

Type 4852 Type 4852 Type 3652 Type 2452

40,000 / 46,000 40,000 / 46,000 30,000 / 35,000 18,000 / 23,000

47,400 / 54,600 46,300 / 54,600 34,000 / 38,900 23,000 / 26,400

Room 2
(indoor unit 2)

Room 3
(indoor unit 3)

Room 4
(indoor unit 4)

(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 (BTU/h) 249,100 / 278,100 47,800 / 54,600 47,800 / 54,600 36,000 / 39,000 25,000 / 27,000

(1) Model 1.00 / 1.00

(2) Temp. condition 1.020 / 0.937 0.921 / 0.780 0.921 / 0.980 0.921 / 0.980 0.921 / 0.980

(3) Tubing length,

elevation difference

Correction coefficient

(4) Frosting/defrosting 0.89

Result of (2) × (3) 0.992 / 1.031 0.969 / 1.014 0.945 / 0.997 0.921 / 0.980

Correction coefficient
applied to indoor unit *1

(5) Corrected capacity (BTU/h) *2 208,100 / 201,900 47,400 / 54,600 46,300 / 54,600 34,000 / 38,900 23,000 / 26,400

(6) Correction coefficient

for corrected capacity ratio

(7) Actual capacity (BTU/h) 47,400 / 54,600 46,300 / 54,600 34,000 / 38,900 23,000 / 26,400

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

The actual capacity is calculated as shown below.

Cooling: Ruc = (47,400 + 46,300 + 34,000 + 23,000) / 208,100 = 0.724 < 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 = (54,600 + 54,600 + 38,900 + 26,400) / 201,900 = 0.864 < 1
Therefore,
Actual heating capacity of each indoor unit = Corrected heating capacity of each indoor unit × (0.1 × Ruh + 0.9) / Ruh
(In other words, the correction coefficient (6) for the corrected capacity ratio is (0.1 × Ruh + 0.9) / Ruh.)

0.819 / 0.871

Room 1
(indoor unit 1)

1.077 / 1.052 1.052 / 1.035

0.99 / 1.03 0.97 / 1.01 0.95 / 1.00 0.92 / 0.98

Room 2
(indoor unit 2)

Room 3
(indoor unit 3)

1.00 / 1.00

Room 4
(indoor unit 4)

1.026 / 1.017 1.00 / 1.00

2-18

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2-19

Design of W-2WAY ECO-i SYSTEM Unit Specifications

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964

09053 14053

3652

4852

1852

1852

1852 0952

3652 3652 1852

LH

16.4ft

16.4ft

2. System Design

(3) Increasing the size of the refrigerant tubing

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

Refer to Table 2-13 to increase the tubing size. However, the maximum allowable tubing length must not be exceeded.

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

Table 2-13 Correction coefficient for equivalent length when the size of the gas tube (LM) is increased

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

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

Equivalent length correction
coefficient

* When increasing the size of the suction and discharge tubing (LM), multiply by the correction coefficient from Table 2-13 and

calculate the equivalent length for section LM.

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

ø1/2"

(ø12.7)

ø5/8"

(ø15.88)

ø5/8"

(ø15.88)

ø3/4"

(ø19.05)

0.4 0.5 0.6

ø3/4"

(ø19.05)

ø7/8"

(ø22.22)

ø7/8"

(ø22.22)

ø1-1/8"

(ø28.58)

ø1-1/8"

(ø28.58)

ø1-3/8"

(ø34.93)

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

Sample calculation for the system below

Design of W-2WAY ECO-i SYSTEM Unit Specifications

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2. System Design

Additional refrigerant charge before extension

Liquid tube

diameter

La ø1/2 6.6 1.38 9.055

Lb ø3/8 65.6 0.602 39.501
LA ø3/4 26.2 2.78 72.966
LB ø1/2 19.7 1.38 27.165
LC ø1/2 19.7 1.38 27.165
LD ø1/2 19.7 1.38 27.165

LE1 ø3/8 16.4 0.602 9.875

LG ø5/8 26.2 1.99 52.231
LH ø3/8 13.1 0.602 7.900

L1 ø3/8 9.8 0.602 5.925

L2 ø1/4 9.8 0.279 2.746

L3 ø1/4 9.8 0.279 2.746

L7 ø3/8 9.8 0.602 5.925

L8 ø1/4 9.8 0.279 2.746

L9 ø1/4 13.1 0.279 3.661

Tubing length (ft)

(A)

Total (oz) 296.775 297 oz

Additional refrigerant charge

per 1 ft (oz/ft) (B)

(A) × (B) oz

Additional refrigerant charge after extension

Liquid tube

diameter

LE2 ø3/8 13.1 0.602 7.900

LF ø3/8 16.4 0.602 9.875

L4 ø3/8 13.1 0.602 7.900

L5 ø3/8 19.7 0.602 11.850

L6 ø1/4 23.0 0.279 6.407

Calculation of additional refrigerant charge for the entire 2-WAY ECO-i system

(Additional refrigerant charge for entire 2-WAY ECO-i system)
= (Refrigerant charge at outdoor unit) + (Additional refrigerant charge)
= 881 + 341 = 1222 oz (after extension)
[Before extension: 458 + 297 = 755 oz]

Tubing length (ft)

(A)

Total (oz) 43.934 44 oz

Additional refrigerant charge

per 1 ft (oz/ft) (B)

(A) × (B) oz

2-20

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2-21

Design of W-2WAY ECO-i SYSTEM Unit Specifications

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WARNING

2. System Design

0 0

57

114

170

227

284

341

398

454

511

568

625

682

738

795

852

909

966

1022

1079

1136

0

500

1000

1500

2000

2500

3000

3500

4000

4500

5000

5500

6000

6500

7000

7500

8000

8500

9000

9500

10000

1000500 1500 2000 2500 3000

Total amount of refrigerant

Min. indoor volume

Min. indoor floor area

(when the ceilin

g

is 8.8 ft. hi

g

h)

ft.

3

ft.

2

oz

Range above
the density limit of

0.3 oz/ft.

3

(countermeasures
needed)

Range below
the density limit of

0.3 oz/ft.

3

(countermeasures
not needed)

Checking of limit density

The limit density judgment is made based on the room with the
indoor unit having the smallest capacity in the system after exten­sion.
The volume of the room where a type 1852 indoor unit is used
(connected to tubing L9) is calculated as follows:
floor area 166 ft2 × Ceiling height 8.8 ft = 1,410 ft3. From the graph
below, the minimum room volume for 1,222 oz of refrigerant is
4,070 ft3 (floor area 463 ft2). Therefore an opening for ventilation is
required.

<Judgment by calculation>

Total refrigerant charge for the refrigeration equipment (oz)

Smallest room volume of all rooms where indoor units are

installed (ft3)

1,222 (oz)

=

1,410 (ft3)

= 0.86 (oz/ft3) > 0.3 (oz/ft3)

In this case, an opening is required for ventilation.

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

Checking of limit density

When installing an air conditioner in a room, it is necessary to
ensure that even if the refrigerant gas accidentally leaks out, its
density does not exceed the limit level for that room.
If the density could exceed the limit level, it is necessary to provide
an opening between the unit and the adjacent room, or to install
mechanical ventilation which is interlocked with a leak detector.

(Total refrigerant charged amount: oz)

(Min. indoor volume where the indoor unit is installed: ft.3)

<

Limit density 0.3 (oz/ft.3)

The limit density of refrigerant R410A which is used in this unit is

0.3 oz/ft.3 (ISO 5149).

The shipped outdoor unit comes charged with the amount of refriger­ant fixed for each type, so add it to the amount that is charged in the
field. (For the refrigerant charge amount at shipment, refer to the
unit’s nameplate.)

Minimum indoor volume & floor area as against the amount
of refrigerant is roughly as given in the following table.

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15 to 30

°

B

A

B

A

Arrow view

Horizontal
line

View as seen
from arrow

Ball valve

(BV: purchased

separately)

Main tubing

Types of vertical trap specifications

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

Indoor unit (1)

(When not using ball valve)

(When using ball valve)

Branch tubing is
directed upward.

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

Main tubing

Indoor unit

More than

8 in

Indoor unit (more than 2 units)

Horizontal

Indoor unit is directed downward

2. System Design

Design of W-2WAY ECO-i SYSTEM Unit Specifications

Installing distribution joint

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

enclosed with the optional distribution joint kit (APR­CHP680BA, CHP1350BA, P160BA, P680BA,
P1350BA).

(2) In order to prevent accumulation of refrigerant oil in

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

(3) If there are height differences between indoor units

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

(Consult with SANYO separately concerning the ball

valve.)

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)

2-22

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3. Electrical Wiring

Control wiring

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

(D) Remote control wiring (E) Control wiring for group control

(F) Inter-outdoor unit control wiring

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

AWG #18 (0.75 mm2)

Use shielded wiring* Use shielded wiring Use shielded wiring

Use shielded wiring

Max. 3,280 ft.

Max. 1,640 ft.

Max. 1,640 ft. (Total)

Max. 1,640 ft.

O

utdoor unit

CHDX09053 60 A

CHDX14053 80 A

Time delay fuse or

circuit capacity

(A) Power supply wiring

Indoor unit

Time delay fuse or

(B) Power supply wiring

circuit capacity

K

A, X, T, U

Type

Type

15 A

For field wiring rules, please refer to
your LOCAL ELECTRICAL CODES

For field wiring rules, please refer to
your LOCAL ELECTRICAL CODES

15 A

15 A

D

Design of W-2WAY ECO-i SYSTEM Unit Specifications

3-1. General Precautions on Wiring

(1) Before wiring, confirm the rated voltage of the unit

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

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

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

(3) To prevent possible hazards from insulation failure,

the unit must be grounded.

(4) Each wiring connection must be done in accordance

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

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

compressor, or any moving parts of the fan.

(6) Unauthorized changes in the internal wiring can be

very dangerous. The manufacturer will accept no re-

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

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

(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 rel-

evant rules and regulations.

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

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

The remote control wiring and the inter-unit control wiring

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

Use shielded wires for inter-unit control wiring between

units and ground the shield on both sides.

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

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

NOTE

* With ring-type wire terminal.

2-23

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3. Electrical Wiring

NOT E

(1) Refer to Section 3-2. “Recommended Wire Length and

Wire Diameter for Power Supply System” for the

explanation of “A,” “B,” “C,” “D,” and “E,” in the above

diagram.

(2) The basic connection diagram of the indoor unit shows

the 7P terminal board, so the terminal boards in your

equipment may differ from the diagram.

(3) Refrigerant Circuit (R.C.) address should be set before

turning the power on.

(4) Regarding the R.C. address setting, refer to Section 5.

Address setting can be executed by remote controller

automatically. Refer to Section 5.

K Type

1(L1) 2(L2)

U2U1

1 2 3 4 5

Power
supply

Inter-unit

control wiring

5P terminal board

1(L1) 2(L2)

Power
supply

U1
Inter-unit

control wiring

U2

Remote

controller

R1

R2

X,A,U,D,T Type

7P terminal board

U2

U1

L2

L1

R2

R1

2

1

U2

U1

4

3

3

4

5

2

1

WHT

Remote
controller

BLK

2

1

2

1

WHT

Remote
controller

Group control:

BLK

2

1

2

1

WHT

Remote
controller

D

A

E

Indoor
unit (No. 4)

Indoor
unit (No. 1)

Indoor
unit (No. 2)

Indoor
unit (No. 3)

C

B

Outdoor unit
INV unit

L1
L2
L3

Ground

Ground

L1
L2

L1
L2

L1
L2

L1
L2

BLK

2

1

2

1

4

3

3

4

5

Outdoor unit
INV unit

Power supply
208 / 230V, 1ø, ~60Hz

Power supply
208 / 230V, 1ø, ~60Hz

Power supply
208 / 230V, 1ø, ~60Hz

Power supply
208 / 230V, 1ø, ~60Hz

Power supply
208 / 230V, 3ø, ~60Hz

Power supply
208 / 230V, 3ø, ~60Hz

B

B

B

Ground

Ground

Ground

Ground

A

L1
L2
L3

Ground

Ground

C

Ground

Ground

Ground

Ground

Ground

F

Ground

D

D

C

Ground

Ground

C

Ground

Inter-outdoor-unit control wiring

U2

U1

L2

L1

R2

R1

U2

U1

L2

L1

R2

R1

U2

U1

L2

L1

R2

R1

3-3. Wiring System Diagrams

Design of W-2WAY ECO-i SYSTEM Unit Specifications

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2-25

Design of W-2WAY ECO-i SYSTEM Unit Specifications

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Outdoor unit Outdoor unit Outdoor unit

Indoor unit Indoor unit Indoor unit Indoor unit

Indoor unit

more than 3.3 ft

more than 3.3 ft

Branch
point

16 or fewer

Indoor unit

Indoor unit Indoor unit Indoor unit

less than 3.3 ft

Indoor unit

Outdoor unit Indoor unit Indoor unit Indoor unit

Indoor unit Indoor unit Indoor unit

Outdoor unit

Indoor unit

NO

NO

Branch point

Outdoor unit Outdoor unit Outdoor unit

Prohibited

Prohibited

Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit

WARNING

CAUTION

3. Electrical Wiring

(1) When linking outdoor units in a network (S-net link system), 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.)
Otherwise the communication of S-net link system is not performed. For a system without link (no con-

nection 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)

(3) Do not install inter-unit control wiring such as star branch

wiring. Star branch wiring causes mis-address setting.

(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)

Fig. 2-1

Fig. 2-2

Fig. 2-3

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7

8

3. Electrical Wiring

WARNING

Shielded wire

Ground

Ground

Stranded wire

Ring
pressure

terminal

Strip 3/8 in

Wire

Special
washer

Screw

Ring pressure

terminal

Terminal plate

Screw and
Special washe

r

Ring
pressure

terminal

Wire

(5) Use shielded wires for inter-unit control wiring (c)

and ground the shield on both sides, otherwise

misoperation from noise may occur.(Fig. 2-4)
Connect wiring as shown in Section 3-3. “Wiring

System Diagrams.”

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

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.

Design of W-2WAY ECO-i SYSTEM Unit Specifications

Fig. 2-4

How to connect wiring to the terminal

For stranded wiring

(1) Cut the wire end with cutting pliers, then strip the insulation

to expose the stranded wiring about 3/8 in and tightly twist
the wire ends.(Fig. 2-5)

(2) Using a Phillips head screwdriver, remove the terminal

screw(s) on the terminal plate.

(3) Using a ring connector fastener or pliers, securely clamp

each stripped wire end with a ring pressure terminal.

(4) Place the ring pressure terminal, and replace and tighten

the removed terminal screw using a screwdriver.
(Fig. 2-6)

Fig. 2-5

Fig. 2-6

2-26

1

2

3

4

5

6

7

8

Concealed Duct (High-Static Pressure) Type
4-Way Air Discharge Semi-Concealed Type

3 ft.

3 ft.

3 ft.

3 ft.

3 ft.

W all-Mounted T ype

min.6 in.

Front View

min.
6 in.

min.
6 in.

Ceiling-Mounted T ype

Side vie w

min. 10 in.

min. 2 ft.

Air intake

Air
discharge

min. 10 in.

Ceiling

Wall

Front view

Max. 10 in.

Obstacle

NOTE

The rear of the indoor unit can be installed flush
against the wall.

min. 2 in.

min. 2 in.

min. 3 ft.

Air
intake

Air

discharge

Obstacle

Ceiling

Wall

Wall

Side view

1-Way Air Discharge Semi-Concealed Type

4. Installation Instructions

4. Installation Instructions

4-1. Indoor Unit

AVOID:

areas where leakage of flammable gas may be expected.

places where large amounts of oil mist exist.

direct sunlight.

locations near heat sources which may affect the perform-

ance of the unit.

locations where external air may enter the room directly.

This may cause “sweating” on the air discharge ports,

causing them to spray or drip.

locations where the remote controller will be splashed with

water or affected by dampness or humidity.
installing the remote controller behind curtains or furniture.

locations where high-frequency emissions are generated.

DO:

select an appropriate position from which every corner of

the room can be uniformly cooled.
select a location where the ceiling is strong enough to

support the weight of the unit.
select a location where tubing and drain pipe have the

shortest run to the outdoor unit.
allow room for operation and maintenance as well as unre-

stricted air flow around the unit.
install the unit within the maximum elevation difference

above or below the outdoor unit and within a total tubing

length (L) from the outdoor unit as detailed in Table 2-1.
allow room for mounting the remote controller about 3 ft

off the floor, in an area that is not in direct sunlight nor in

the flow of cool air from the indoor unit.

Design of W-2WAY ECO-i SYSTEM Unit Specifications

Fig. 2-7

Fig. 2-8

Air delivery will be degraded if the distance from the floor to
the ceiling is greater than 10 ft.

NOTE

Fig. 2-9

Fig. 2-10

2-27

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

WARNING

CAUTION

Fig. 2-11

Out­door
unit

Heat
source

Hot air

Exhaust fan

More than
2 in.

More than

1.7 ft.

* More than 4 in.

* More than 4 in.

* More than 4 in.

Example of installation of 2 units

(When wall height is below 6 ft.)

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

either the right side or the rear of the unit.

74-1/64

35-3/64

35-3/64

36-7/32

37-13/32

35-3/64

7-7/8

3 - 15/16

31-7/64

70-5/64

31-7/64

Design of W-2WAY ECO-i SYSTEM Unit Specifications

4. Installation Instructions

4-2. Indoor Unit

AVOID:

heat sources, exhaust fans, etc.

damp, humid or uneven locations

indoors (no-ventilation location)

DO:

choose a place as cool as possible.

choose a place that is well ventilated.

select a location where tubing and drain pipe have the

shortest run to the outdoor unit.
allow enough room around the unit for air intake/exhaust

and possible maintenance.

Installation Space

Install the outdoor unit where there is enough space for venti­lation. Otherwise the unit may not operate properly. Fig. 2-12
shows the minimum space requirement around the outdoor
units when 3 sides are open and only 1 side is shuttered, with
open space above the unit. The mounting base should be
concrete or a similar material that allows for adequate drain­age. Make provisions for anchor bolts, platform height, and
other site-specific installation requirements.

Leave space open above the

unit.

Construct louvers or other

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

NOTE

Do not do any wiring or tubing within 1 ft of the front panel,

because this space is needed as a servicing space for the

compressor.
Ensure a base height of 4 in or more to ensure that drain-

age water does not accumulate and freeze around the

bottom of the unit.
If installing a drain pan, install the drain pan prior to install-

ing the outdoor unit.

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

and the ground.
Also, the direction of the tubing and electrical wiring

should be from the front of the outdoor unit.

Fig. 2-12

Fig. 2-13

Unit: in.

2-28

1

2

3

4

5

6

7

8

2-29

Design of W-2WAY ECO-i SYSTEM Unit Specifications

1

2

3

4

5

6

7

8

WARNING

CAUTION

With snow-

(High platform)

Without snow-

proof ducting

proof ducting

(Without platform)

AVOID

Fallen snow

DO

Fig. 2-14

Fig. 2-15

Fig. 2-16

4. Installation Instructions

4-3. Shield for Horizontal Exhaust Discharge

It is necessary to install an air-discharge chamber (field sup­ply) to direct exhaust from the fan horizontally if it is difficult
to provide a minimum space of 7 ft between the air-discharge
outlet and a nearby obstacle. (Fig. 2-14)

In regions with heavy snowfall,
the outdoor unit should be
provided with a solid, raised
platform and snow-proof duct­ing (field supply).(Fig. 2-15)

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

In locations where wind-blown snow can be a problem, snow­proof ducting (field supply) should be fitted to the unit and
direct exposure to the wind should be avoided as much as
possible. (Fig. 2-16) The following problems may occur if
proper countermeasures are not taken:

The fan in the outdoor unit may stop running, causing the

unit to be damaged.
There may be no air flow.
The tubing may freeze and burst.
The condenser pressure may drop because of strong

wind, and the indoor unit may freeze.

4-5. Precautions When Installing in Heavy Snow
Areas

a) The platform should be higher than the maximum snow

depth. (Fig. 2-15)

b) The 2 anchoring feet of the outdoor unit should be used

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

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

d) When installing on a roof subject to strong wind, counter-

be secured with anchor bolts.

measures must be taken to prevent the unit from being
overturned.

Design of W-2WAY ECO-i SYSTEM Unit Specifications

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

33-3/16

2-11/64 15/16

97-29/32

65-53/64 (32-5/64)

35-15/64

(Maximum bracket dimensions)

35-3/64

(Ceiling panel dimensions)

33-3/16

35-15/64

(Maximum bracket dimensions)

35-3/64

(Ceiling panel dimensions)

35-3/64

(Ceiling panel dimensions)

2-11/64 15/16

97-29/32

65-53/64 (32-5/64)

35-3/64

(Ceiling panel dimensions)

Air direction: Front direction Air direction: Right direction

Ceiling panel

Front view Front view Right side view Right side view

Ceiling panel

unit: in.

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

2-11/64 15/16

35-3/64

(Ceiling panel dimensions)

97-29/32

65-53/64 (32-5/64)

Right side view

unit: in.

31-7/64

33-3/16

5-25/32

74-7/32 (2-unit installation:maximum dimensions)

7-7/8

31-7/64

(Installation hole pitch)

33-3/16

36-7/32

(I

nstallation hole pitch)

Front view

Top view

4. Installation Instructions

4-6. Dimensions of Wind Ducting

Reference diagram for air-discharge chamber (field supply)

2-unit installation

2-30

1

2

3

4

5

6

7

8

2-31

Design of W-2WAY ECO-i SYSTEM Unit Specifications

1

2

3

4

5

6

7

8

Front view

45-5/16

45-5/16

36-7/64

92-53/64

36-7/64

2

3

2

1

1

97-29/32

65-53/64

36-7/64

45-5/16

(32-5/64)

Air direction:
Front direction

Air direction:
Right direction

Ceiling panel

Ceiling panel

Front view

Right side view

Right side view

Ceiling panel

Front view

Right side view

unit: in.

unit: in.

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

53-55/64

31-17/32

31-17/32 (Air intake duct)
33-3/16 (Air outlet duct)

35-3/64

(Ceiling panel dimensions)

9-13/32

53-55/64

36-7/64

45-5/16

9-13/32

9-13/32

35-3/64

9-13/32 9-13/32

53-55/64

35-3/64

(Ceiling panel dimensions)

32-7/8 32-7/8

9-13/32

9-13/32

35-3/64

(Ceiling panel dimensions)

9-13/32

15/16 15/16

53-55/64

31-17/32

31-17/32

1 pc.

4 pc.

31-17/32

35-3/64 35-3/64

3-15/16 3-15/16

112-63/64

35-3/64

31-7/64

7-7/8

31-17/32

97-29/32

65-53/64

9-29/64 9-29/64

7/82-11/64

45-5/16

36-7/64

31-17/32

7-7/8

31-7/64 31-7/64

35-3/64

36-7/32

37-13/32

2 3 2

2

1

35-3/64

(Ceiling panel dimensions)

31-17/32 (Air intake duct)

33-3/16 (Air outlet duct)

Top (Before installation of snowfall protection duct)

2 3 2

74-1/64

35-3/64

35-3/64

36-7/32

37-13/32

35-3/64

7-7/8

3 - 15/16

31-7/64

70-5/64

31-7/64

4. Installation Instructions

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

2-unit installation

Design of W-2WAY ECO-i SYSTEM Unit Specifications

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

C D E F

H I

H

I

C

C

G

G

G

6-59/64

5-5/16

4-21/64

3-13/16

4-31/64

2-53

/

64

Insulation

Distribution
Joint

Reducing
Joints

Insulation

Distribution
Joint

Reducing
Joints

Gas tubing Liquid tubing

Insulation

B

F

H I

H

I

G

G

G

B

B

(A)

(A)

(A)

6-57/64

5-5/16

4-21/64

3-13/16

C

C

C

D

D

D

4-31/64

2-53

/

64

E

F

Reducing
Joints

Distribution
Joint

Insulation

( ): Outside dimension

Distribution
Joint

Reducing
Joints

Gas tubing Liquid tubing

4. Installation Instructions

4-8. Optional Distribution Joint Kits

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

Table 2-14

Model name Cooling capacity after distribution Remarks

1. APR-CHP680BA 232,000 BTU/h (68.0 kW) or less For outdoor unit

2. APR-CHP1350BA 460,700 BTU/h (135.0 kW) or less For outdoor unit

3. APR-P160BA 76,400 BTU/h (22.4 kW) or less For indoor unit

4. APR-P680BA 232,000 BTU/h (68.0 kW) or less For indoor unit

5. APR-P1350BA 460,700 BTU/h (135.0 kW) or less For indoor unit

■ Tubing size (with thermal insulation)

1. APR-CHP680BA

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

Example:

Unit: in.

Table 2-15 Size of connection point on each part (Shown are inside diameters of tubing)

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

(ø34.93) (ø31.75) (ø28.58) (ø25.4) (ø22.22) (ø19.05) (ø15.88) (ø12.7) (ø9.52)

2. APR-CHP1350BA

ø1-3/8" ø1-1/4" ø1-1/8" ø1" ø7/8" ø3/4" ø5/8" ø1/2" ø3/8"

in. (mm)

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

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

Example:

Table 2-16 Size of connection point on each part (Shown are inside diameters of tubing)

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

in. (mm)

(ø34.93) (ø31.75) (ø28.58) (ø25.4) (ø22.22) (ø19.05) (ø15.88) (ø12.7) (ø9.52)

ø1-3/8" ø1-1/4" ø1-1/8" ø1" ø7/8" ø3/4" ø5/8" ø1/2" ø3/8"

2-32

Unit: in.

1

2

3

4

5

6

7

8

2-33

Design of W-2WAY ECO-i SYSTEM Unit Specifications

1

2

3

4

5

6

7

8

4-21/64

3-13/16

4-21/64

3-13/16

2-53/64

2-53/64

Insulation

B

A

D

B

B

C

C

C

D E

A

C

D
E

B

Distribution
Joint

Insulation

Distribution
Joint

Gas tubing Liquid tubing

6-57/64

5-5/16

4-21/64

3-13/16

E

E

F G

F
G
H

B
C

D

E
F

E

B C D

F G H

D C B

E F

4-31/64

2-53/64

Distribution
Joint

Distribution
Joint

Insulation

Insulation

Reducing
Joints

Reducing
Joints

A

A

A

Gas tubing Liquid tubing

6-57/64

5-5/16

4-21/64

3-13/16

H

I

J

C
D

E
F

G

H

4-31/64

2-53/64

G

F

F

H

G

G

Distribution
Joint

Distribution
Joint

Insulation

Insulation

Reducing
Joints

Reducing
Joints

B

CD

B

B

(A)

(A)

(A)

C D

Gas tubing Liquid tubing

( ): Outside dimension

4. Installation Instructions

3. APR-P160BA
Use: For indoor unit (Capacity after distribution joint is 76,400 BTU/h (22.4 kW) or less.)

Example:

Unit: in.

Table 2-17 Size of connection point on each part (Shown are inside diameters of tubing)

Size Part A Part B Part C Part D Part E

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

4. APR-P680BA

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

ø3/4" ø5/8" ø1/2" ø3/8" ø1/4"

in. (mm)

Example:

Unit: in.

Table 2-18 Size of connection point on each part (Shown are inside diameters of tubing)

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

(ø28.58) (ø25.4) (ø22.22) (ø19.05) (ø15.88) (ø12.7) (ø9.52) (ø6.35)

5. APR-P1350BA

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

ø1-1/8" ø1" ø7/8" ø3/4" ø5/8" ø1/2" ø3/8" ø1/4"

in. (mm)

Example:

Table 2-19 Size of connection point on each part (Shown are inside diameters of tubing)

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

in. (mm)

(ø34.93) (ø31.75) (ø28.58) (ø25.4) (ø22.22) (ø19.05) (ø15.88) (ø12.7) (ø9.52) (ø6.35)

ø1-3/8" ø1-1/4" ø1-1/8" ø1" ø7/8" ø3/4" ø5/8" ø1/2" ø3/8" ø1/4"

Unit: in.

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

(Positions where anchor bolts are fastened)

31-7/64 (Installation hole pitch)

37-13/32 (Maximum dimensions)

35-3/64 (Ceiling panel dimensions)

36-7/32 (Installation hole pitch)

35-3/64 (Ceiling panel dimensions)

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

(3-15/16)

(3-15/16)

3-29/64

25/32

1-31/32

Washer

Plate leg

Base

Anchor bolts

Vibration insulator

WARNING

CAUTION

1-33/64

19/32

1-31/32

4 – 19/32 25/32 hole

(Detailed view of legs)

Surface where

installation anchor

brackets are

installed

74-1/64 (Ceiling panel dimensions)

70-5/64 (Installation hole pitch)

35-3/64 (Ceiling panel dimensions) 35-3/64 (Ceiling panel dimensions)

35-3/64 (Ceiling panel dimensions)

31-7/64 (Installation hole pitch) 31-7/64 (Installation hole pitch)

36-7/32 (Installation hole pitch)

37-13/32 (Maximum dimensions)

Design of W-2WAY ECO-i SYSTEM Unit Specifications

4. Installation Instructions

4-9. Transporting the Outdoor Unit

When transporting the unit, have it delivered as close to the
installation site as possible without unpacking.
Use a hook for suspending the unit. (Fig. 2-17)

When hoisting the outdoor unit, pass ropes or straps under the bottom plate

as shown in the figure at right. When hoisting, the angle between the rope

and top panel must be 70° or greater so that the rope does not come into

contact with the fan guard.

(Use 2 lengths of rope 25 ft. long or longer.)

When passing the ropes through the square holes of the bottom plate:

Place the rope in the outer edge of the square holes.

Use protective panels or padding at all locations where the rope contacts the

outer casing or other parts to prevent scratching. In particular, use protective

material (such as cloth or cardboard) to prevent the edges of the top panel

from being scratched.

Be careful of the fan.

There is danger of injury if the fan starts to turn during inspection. Be sure to

turn OFF the remote power switch before beginning inspection.

Fig. 2-17

4-10. Installing the Outdoor Unit

(1) Use anchor bolts (M12 or 15/32") or similar to securely anchor the unit in

place. (Fig. 2-18)

(2) Be sure the rubber vibration insulator and platform extend to the inside of

the legs. In addition, the washers used to anchor the unit from the top must

be larger than the installation anchor holes. (Figs. 2-18 and 2-19)

Top view

Unit: in.

2-34

Unit: in.

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

Fig. 2-18

Fig. 2-19

Unit: in.

1

2

3

4

5

6

7

8

2-35

Design of W-2WAY ECO-i SYSTEM Unit Specifications

1

2

3

4

5

6

7

8

Fig. 2-21

Remove 2 screws

Tubing cover

Bottom

Front

Remove 11 panel
screws from front
panel

Use cutting pliers or similar
tool to cut cover out

Fig. 2-20

Indentation
(4 locations)

Slit hole

4. Installation Instructions

4-11. Routing the Tubing

The tubing can be routed out either from the front or from the bottom. (Fig. 2-21)
The connecting valve is contained inside the unit. Therefore, remove the front panel. (Fig. 2-21)

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

) from the tubing cover. (Figs. 2-20 and 2-21)

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

part ( ).

Use a drill bit approximately 13/64 ft dia. to create holes at

the 4 slit hole indentations (openings).
Punch out the slit part ( ).
Be careful not to damage the base plate.

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

WARNING

CAUTION

1

2

3

Yes (ø1" ø1-1/8")

Connection method Supplied parts used?

Gas tubing

Liquid tubing

Balance tube

Brazing

Flare connection

Flare connection

No

No

1

2

3

Refrigerant tubing

Yes (ø3/4" ø7/8")

1

2

3

Connection method Supplied parts used?

Gas tubing

Liquid tubing

Balance tube

Brazing

Flare connection

Flare connection

No

No

1

2

3

Refrigerant tubing

Design of W-2WAY ECO-i SYSTEM Unit Specifications

4. Installation Instructions

4-12. Prepare the Tubing

Material: Use C1220 phosphorous deoxidized copper as described in JIS H3300, “Copper and Copper Alloy Seamless Pipes

and Tubes.” (For tubes that are ø7/8" (ø22.22 mm) or larger, use 1/2H material or H material. For all others use O material.)
Tubing size

Use the tubing size indicated in the table below.
When cutting the tubing, use a tube cutter, and be sure to remove any burrs.

(The same applies to distribution tubing (optional).)
When bending the tubes, bend each tube using a radius that is at least 4 times the outer diameter of the tube.

When bending, use sufficient care to avoid crushing or damaging the tube

For flaring, use a flare tool, and be sure that flaring is performed correctly.

Use sufficient caution during preparation of the tubing. Seal the tube ends by means of caps
or taping to prevent dust, moisture, or other foreign substances from entering the tubes.

Refrigerant tubing (Existing tubing can be used.)

Material O Material 1/2H • H

ø1/4" (ø6.35) t1/32" (0.8) ø7/8" (ø22.22) t5/128" (1.0)

ø3/8" (ø9.52) t1/32" (0.8) ø1" (ø25.4) t5/128" (1.0)

ø1/2" (ø12.7) t1/32" (0.8) ø1-1/8" (ø28.58) t5/128" (1.0)

ø5/8" (ø15.88) t5/128" (1.0) ø1-1/4" (ø31.75) t3/64" (1.1)

ø3/4" (ø19.05) over t5/128" (1.0) ø1-3/8" (ø34.93) over t3/64" (1.15)

Tubing size (in. (mm))

4-13. Connect the Tubing

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

09053 type (10 hp)

14053 type (16 hp)

2-36

1

2

3

4

5

6

7

8

2-37

Design of W-2WAY ECO-i SYSTEM Unit Specifications

1

2

3

4

5

6

7

8

4. Installation Instructions

WARNING

CAUTION

Tubing
cover

Bottom
plate

Brazing locations

Field-supply tube

Taping

Remote valve

Nitrogen

Pressure-reducing valve (regulator)

Service port cap
(width 19/32)

(0905 Type) (1405 Type)

Service port cap
(width 19/32”, 43/64”)

Service port cap
(width 19/32)

Flare nut
(ø1/4)

Flare nut
(ø3/8)

Service port cap
(width 19/32)

Valve cap
(width 55/64)

Valve cap
(width 55/64”, 15/16”)

Valve cap
(width 55/64)

Valve cap
(width 55/64)

Service port cap
(width 43/64)

Service port cap
(width 19/32)

Flare nut
(ø1/4)

Flare nut
(ø3/8)

Service port cap
(width 19/32)

Valve cap
(width 15/16)

Valve cap
(width 55/64)

Valve cap
(width 55/64)

Cap tightening torque

* Be careful of the cap sizes. The sizes of the service port cap and valve cap
on the 14053 type liquid tube valves are different from other valve caps.

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

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

60 – 100 lbs

·

in. (70 – 120 kgf

·

cm)

170 – 220 lbs

·

in. (200 – 250 kgf

·

cm)

Do not apply a monkey wrench
to the hexagonal part.

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

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

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

Refrigerant tube port

Use caulking, putty, or a similar material to fill any gaps at the

refrigerant tube port (

foreign substances from entering the unit.

* Perform this work even if the tubing is routed out in a downward

direction.

Tighten each cap as specified below.

Tightening torque for each cap

) in order to prevent rainwater, dust or

Tubing routed out

through the front side

Tubing routed out

through the bottom

Precautions for brazing
Be sure to replace the air inside the tube with nitrogen to prevent oxide film from forming during the brazing process.

Be sure to use a damp cloth or other means to cool the valve unit during brazing.

Work method

Unit: in.

1. Be sure to use nitrogen. (Oxygen, CO2, and CFC must not be used.)

2. Use a pressure-reducing valve on the nitrogen tank.

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

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

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Control of W-2WAY ECO-i SYSTEM

Contents

3. Control of W-2WAY ECO-i SYSTEM

1. Main Operating Functions .................................................................................................3-3

1-1. Room Temperature Control ...........................................................................................3-3

1-2. Automatic Control for Heating and Cooling ...................................................................3-4

2. Wireless Remote Controller ..............................................................................................3-5

Optional Controller (Remote Controller) ..........................................................................3-5

How to Use the Wireless Remote Controller.....................................................................3-5

Receiver ............................................................................................................................3-8

RCS-SH80AAB.WL for 4-Way Air Discharge Semi-concealed (X Type) ...........................3-9

RCS-TRP80AAB.WL for 1 Way Air Discharge Semi Concealed (A Type) and

Ceiling-Mounted (T Type) ..........................................3-12

RCS-BH80AAB.WL for Concealed Duct (U Type) and

Concealed Duct High-Static Pressure (D Type) ........3-15

RCS-SH1AAB for Wall-Mounted (K Type) .......................................................................3-21

3. Timer Remote Controller .................................................................................................3-22

Timer Remote Controller/RCS-TM80BG .........................................................................3-22

How to Use the Timer Remote Controller .......................................................................3-22

Names and Operations ...................................................................................................3-23

Setting the Present Time ................................................................................................3-28

Weekly Program Function ...............................................................................................3-29

Outing Function ..............................................................................................................3-34

Sleeping Function ...........................................................................................................3-36

4. System Controller ............................................................................................................3-38

System Controller / SHA-KC64UG ..................................................................................3-38

How to use the system controller ....................................................................................3-39

Functions of buttons ........................................................................................................3-40

Display ............................................................................................................................3-42

How to start group operation ..........................................................................................3-43

How to start collective operation .....................................................................................3-44

How to install the system controller ................................................................................3-45

Electrical wiring ...............................................................................................................3-46

Address switch setting ....................................................................................................3-47

Mode setting ...................................................................................................................3-49

How to perform zone registration ....................................................................................3-50

ZONE registration table ..................................................................................................3-51

How to check overlapping of central address No. ...........................................................3-55

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Control of W-2 WAY ECO-i SYSTEM

Contents

5. Simplified Remote Controller ..........................................................................................3-56

Simplified Remote Controller / RCS-KR1AGB ...............................................................3-56

Operation Buttons ...........................................................................................................3-56

Display ............................................................................................................................3-58

Operation ........................................................................................................................3-59

Troubleshooting ...............................................................................................................3-60

Tips for Energy Saving ....................................................................................................3-60

Parts Supplied with Simplified Remote Controller ..........................................................3-61

Simplified Remote Controller Installation Guidelines .....................................................3-61

How to Install the Simplified Remote Controller ..............................................................3-61

How to Wire the Simplified Remote Controller ................................................................3-62

Guidelines for Using 2 Simplified Remote Controllers ....................................................3-63

Remote Controller Test Run Setting................................................................................3-63

6. Remote Sensor .................................................................................................................3-64

Remote Sensor / ART-K45AGB .......................................................................................3-64

Parts Supplied with Remote Sensor ...............................................................................3-64

Remote Sensor Installation Guidelines ...........................................................................3-64

How to Install the Remote Sensor ..................................................................................3-65

How to Wire the Remote Sensor.....................................................................................3-66

Important Information When Using Together with Remote Controller Switch .................3-66

3-2

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3-3

Control of W-2WAY ECO-i SYSTEM

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Cooling

Room temperature

Set temperature

–2

+2

+4

(deg)

T

Thermostat

ON ONOFF

Heating

Room temperature

Set temperature

–4

–2

+2

(deg)

T

Thermostat

ON ONOFF

1. Main Operating Functions

1-1. Room Temperature Control

The thermostat is turned ON/OFF according to as shown below.

T = Room temperature - Set temperature

When remote controller sensor
is used

When body sensor is used Room temperature = Temperature detected by the body sensor - Intake shift temperature*

* Intake shift temperature (enabled only during heating)

During heating, a difference in temperature occurs between the top and bottom of a room. This value is set in consideration for
the difference between the temperature detected by the body sensor and the temperature at the bottom of the room.

<Value set for intake shift temperature at time of shipment>: 39°F

Note: The shift temperature can be selected in the range of 32 – 50°F, by using the remote controller simplified setting mode.

Room temperature = Temperature detected by the remote controller sensor

(1) After the thermostat turns ON, it will not turn OFF again as a result of for 5 minutes.

(2) After the thermostat turns OFF, it will not turn ON again for 3 minutes. (It also will not turn ON for 3 minutes after the power

is switched ON.)

(3) The compressor turns OFF if the mode is changed cooling heating (or heating cooling) while the compressor is ON.

(4) If “test run” mode is selected, the thermostat will not turn OFF as a result of for 60 minutes. (The thermostat is forced ON.)

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Shift ed set temp

Shifted set temp

Selected operating mode

Selected operating mode

Remote controller display

–4 deg

–2 deg

+2 deg

+6 deg

+4 deg

+5 deg

–6 deg

Thermostat

ON

ON

OFF

ONOFF ONOFF ONON OFF

OFF

A

B

C

Heating HeatingCooling

Control of W-2 WAY ECO-i SYSTEM

1. Main Operating Functions

1-2. Automatic Control for Heating and Cooling

Automatic Heating/Cooling Control

(1) When operation starts, heating or cooling is selected according to the set temperature and the room temperature.

Room temperature Set temperature + 2 Cooling
Set temperature – 2 < Room temperature Set temperature + 2 Monitoring mode (*1)
Room temperature < Set temperature – 2 Heating

*1: If the difference between the room temperature and set temperature is small when operation starts, the cooling

thermostat remains in standby status (OFF) until the temperature difference increases. When the temperature differ­ence increases, either cooling operation or heating operation is selected. This standby status is known as “monitoring
mode.”

(2) After operation starts in the selected operating mode, the set temperature is automatically shifted by +4°F (cooling opera-

tion) or –4°F (heating operation).

Example: Temperature set on the remote controller is 68°F.

Selected operating mode Shifted set temp. Remote controller display

1 Cooling 72°F 68°F

2 Heating 64°F 68°F

(3) Operating mode changes (heating cooling, cooling heating) which occur during operation as a result of temperature

changes are handled as shown below.

Heating cooling: Room temperature Shifted set temperature (set temperature + 4°F) + 1°F
Cooling heating: Room temperature Shifted set temperature (set temperature – 4°F) – 2°F

Example: Temperature set on the remote controller is 68°F.

Operating mode change Shifted set temp.

1 Heating Cooling 68 + 4 + 1 = 73°F or higher (*2)

2 Cooling Heating 68 – 4 – 2 = 62°F or lower

*2: During heating operation when the body sensor is used, a temperature shift is applied to the intake temperature

(4) Cooling (heating) operation does not change if the room temperature changes from area C A (or A C) within 10

(5) When the heating/cooling change

detected by the sensor, in consideration for the difference in temperature at the top and bottom of the room. (Refer
to the “Room Temperature Control” item.) If this intake shift temperature is 8°F, then the heating cooling change
occurs when the temperature detected by the body sensor is 80°F or higher.

minutes after the compressor turns OFF. (Monitoring mode is excepted.)

occurs, the 4-way valve switches
approximately 30 to 50 seconds
after the compressor turns ON.

3-4

Control of W-2WAY ECO-i SYSTEM

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The illustration above pictures the wireless remote control unit after the cover
has been lowered and removed.

I: FLAP bu tton

Q: Slide switch

L: SET button

P: ACL button

(ALL CLEAR)

A: ON/OFF operation button

B: Transmitter

D: Temperature setting buttons

H: A/C SENSOR button

N: VENTILATION button

J: TIMER SET button

O: Remote control sensor

F: FILTER button

K: Time setting buttons

G: ADDRESS button

E: FAN SPEED selector button

M: CL button

C: MODE button

NOTE

2. Wireless Remote Controller

Optional Controller (Remote Controller)

Wireless Remote Controller / RCS-SH80AAB.WL (for X Type) / RCS-TRP80AAB.WL (for A, T Type) / RCS­BH80AAB.WL (for U, D Type) / RCS - SH1AAB (for K Type)

How to Use the Wireless Remote Controller

A: ON/OFF operation button This button is for turning the air conditioner on and off.

B: Transmitter When you press the buttons on the wireless remote control unit, the mark appears in the

display to transmit the setting changes to the receiver in the air conditioner.

C: MODE button Use this button to select one of the following five operating modes.

(AUTO) : Used to automatically set cooling or heating operation. Only for single heat pump

type

(HEAT) : Used for normal heating operation. Only for heat pump type

(DRY)

D: Temperature setting buttons ::Press this button to increase the temperature setting.

E: FAN SPEED selector button

(COOL) : Used for normal cooling operation.

(FAN) : Used to run the fan only, without heating or cooling operation.

(AUTO) : The air conditioner automatically decides the fan speeds.

(HI) : High fan speed

(MED) : Medium fan speed

(LO) : Low fan speed

: Used for dehumidifying without changing the room temperature.

Press this button to decrease the temperature setting.

(Temperature range: 62 ~ 80°F)

(Temperature range: 60 ~ 78°F)

(Temperature range: 64 ~ 86°F)

(Temperature range: 64 ~ 86°F)

Continued

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CAUTION

Control of W-2WAY ECO-i SYSTEM

2. Wireless Remote Controller

F: FILTER button If a separately installed signal receiver is being employed, this button is used to turn off its

filter lamp. When the filter lamp has lighted, first clean the filter, and then press the FILTER
button to turn off the filter lamp. When a wired remote control unit and wireless remote
control unit are both used, the filter sign on the wired remote control unit will appear. When
this happens, first clean the filter, and then press the FILTER button on one of the remote
control units to turn off the filter sign.

G: ADDRESS button When a multiple number of indoor units that can be operated by the wireless remote

control unit have been installed in the same room with a multi-unit or single-unit installation,
this button enables addresses to be set in order to prevent the sending of signals to the
wrong indoor unit. Each of up to six indoor units can be controlled separately using its own
wireless remote control unit by matching the number of the address switch on the operation
area of the indoor unit and the number used for the address of its remote control unit. (The
indoor units cannot be controlled separately when they are used in a flexible combination
format, simultaneous operation of multi units format or any other such format since they will
all operate at the same time.)

NOTE

H: A/C SENSOR button When you press this button (use a narrow-tipped object such as a ballpoint pen), the

NOTE

I: FLAP button 1. Use this button to set the airflow direction to a specific angle.

When the batteries are replaced, the address setting returns to "ALL", so you must make
the setting again.

indication will disappear on the display. The room temperature is detected by the sensor
which is built into the indoor unit and the air conditioner is controlled accordingly.

If the remote control is located near a heat source, such as a space heater or in direct
sunlight, press the A/C SENSOR button to switch to the sensor on the indoor unit.

The airflow direction is displayed on the remote control unit.

Operation mode
(COOL) or (DRY)
(HEAT) or (FAN)
(AUTO)

Cooling mode:

Heating mode:

Number of airflow direction settings

3
5

3
5

NOTE

(SWEEP)

In the Cool mode and Dry mode, if the flaps are set in a downward
position, condensation may form and drip around the vent.
Do not move the flap with your hands.

This function is available only for models X, A, T and K.

2. Use this button to make the airflow direction sweep up and down automatically.
Press this button several times until the symbol appears on the display.

To stop the swing operation

Press the FLAP button again during the flap swing operation to stop the flap at the desired
position. Then, the airflow can be set from the top position by pressing the FLAP button
again.

3-6

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3-7

Control of W-2WAY ECO-i SYSTEM

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Fan and heating Cooling and dryi

ng

2. Wireless Remote Controller

Indicator when swing operation is stopped

During cooling and drying, the flap does not stop at the downward position.
Even if the flap is stopped at the downward position during the swing operation, it does not
stop until it moves to the third position from the top.

NOTE

J: TIMER SET button Use this button while the unit is operating to switch between timer settings.

(OFF Timer)

(OFF Cycle Timer)

(ON Timer)

K: Time setting buttons

L: SET button Use this button to set the timer.

M: CL button Use this button to clear the timer setting.

N: VENTILATION button This is used when a ventilation fan (available commercially) is connected. Pressing the

O: Remote control sensor This detects the temperature around the remote control unit when the remote control unit

P: ACL button (ALL CLEAR) Puts the wireless remote control unit into pre-operation status. This is used after the batter-

Q: Slide switch

This function is available only for models X, A, T and K.

: The air conditioner stops after a preset time elapses.
: The air conditioner always stops after a preset time elapses.
: The air conditioner starts after a preset time elapses.

: Press this button to increase the time.
: Press this button to decrease the time.

VENTILATION button turns the fan on and off. The ventilation fan also turns on and off when
the air conditioner unit is turned on and off. (The display of the remote control unit shows "

" while the ventilation fan is running.)

* If the VENTILATION button is held down for 4 or more seconds when the batteries have

been replaced, " " appears on the display, and the ventilation fan can be used.

position has been selected using the sensor button.

ies have been replaced or when the slide switch setting has been changed.

This switch is for setting the operation mode of the indoor unit and setting the flaps.

NOTE

The wireless remote control unit sends the temperature signal to the air

conditioner regularly at five-minute intervals. If the signal from the wireless
remote control unit stops for more than ten minutes due to the loss of the
wireless remote control unit or other trouble, the air conditioner will switch to
the temperature sensor which is built into the indoor unit and control the room
temperature. In these cases, the temperature around the wireless remote
control unit may differ from the temperature detected at the air conditioner's
position.

When low fan speed is selected and the air conditioner is in cooling opera-

tion at a low outdoor temperature of less than 50°F, the air conditioner may
automatically switch to medium fan speed to prevent freezing.

Control of W-2WAY ECO-i SYSTEM

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E

B

C

D

A

B C D A

E

E

G

F

A

B

C

D
H

B C D A

X type

K type

A, T type

Separately installed
signal receiver (U, D type)

2. Wireless Remote Controller

Receiver

The signal receivers with the exception of the separately installed signal receiver are mounted on the indoor units.

A: Receiver This section picks up infrared signals from the wireless remote control unit (transmitter).

Indication lamps One of these lamps will blink when trouble has occurred. When an indicator lamp starts

to blink, refer to "Trouble Diagnosis" in TEST RUN SERVICE MANUAL.

B: Operation lamp This lamp lights when the appliance is turned on.

C: Timer lamp This lamp lights when the system is being controlled by the timer.

D: Standby lamp This lamp lights at the following times during heating operations: When operation

has started, when the thermostat has been activated, during defrosting operation.

The lamp blinks when trouble has occurred.

E: Emergency operation button This is used when operation cannot be performed due to trouble with or loss of the

wireless remote control unit.

F: ADDRESS switch This switch is used in order to prevent the sending of signals to the wrong indoor unit

when a multiple number of indoor units that can be operated by the wireless remote
control units have been installed in the same room.

G: SWING button When this button is pressed, the airflow sweeps up and down automatically.

H: FILTER lamp This lamp lights to indicate that it is time to clean the filter.

If 2 beeps are heard, the operation lamp among the indication lamps has lighted and the timer lamp and standby

lamp blink alternately. In cases where heat pump models are used, this indicates a Cooling/Heating mode mismatch
and, as such, operation in the desired mode cannot be performed.

(The same beeps will be heard and the same operation lamps will light when auto cooling/heating has been

selected on a model which does not have the auto cooling/heating function.)

When local operation has been set to disabled because the centralized control mode is established, for instance,

pressing the ON/OFF operation button, MODE button or temperature setting buttons results in the sounding of 5
beeps, and the attempted change in the operation will not be accepted.

3-8

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3-9

Control of W-2WAY ECO-i SYSTEM

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2. Wireless Remote Controller

Indoor unit
refrigerant tube side

Indoor unit
drain tube side

Receiver unit
installation position
(Right side of electrical
component box)

Indoor unit electrical
component box

Fig. 3-1

Ceiling panel

screw

Adjustable corner cap

Adjustable corner cap

Fig. 3-2

Remove the packing, twist
the wires together and fasten
them with the cable fastener.
Then replace the packing.

Fig. 3-3

Fig. 3-4

How to Install the Wireless Remote Controller
Receiver

RCS-SH80AAB.WL for 4-Way Air Discharge Semi-

Concealed (X Type)

2-1. Installing the Receiver Unit

The only corner where the receiver unit can be installed is the
one shown in Fig. 3-1. Therefore, consider the direction of the
panel when it is installed on the indoor unit.

(1) Remove the intake grille.

(2) Remove the screws that fasten the adjustable corner cap,

then slide the adjustable corner cap to the side to remove
it. (Fig. 3-2)

(3) The square hole used for the panel wiring is filled with

packing (sponge material) used for insulation.* Remove
the packing, then pass the wiring from the wireless re­ceiver unit through the grill.

Twist the wires together and use a cable fastener to fasten

them and fix with screw, then replace the packing in the
hole as it was before. (Fig. 3-3)

* If this packing is not used, there is danger of condensa-

tion on the wiring. Be sure to replace the packing.

(4) After completing wiring as described in “Wiring the Re-

ceiver Unit” on the next page, twist the wires together and
use a cable fastener to fasten them, leaving a length of
wiring that is long enough to permit removal of the adjust­able corner cap.(Fig. 3-3)

(5) Install the receiver unit in the panel. At this time, slide the

receiver unit so that each of the 3 tabs fits into its respec­tive hole. Take care that the wires are not pinched.
(Fig. 3-4)

* Refer to the instruction manual provided with the panel.

NOTE

Do not twist the control wiring together with the power wir-

ing because this may cause a malfunction.

Install a noise filter or take other appropriate action if elec-

trical noise affects the power supply circuit of the unit.

* For wiring and test run procedures, refer to “Wiring the

Receiver Unit” and “Test Run.”

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5

Fastening screw

Remote
control unit

Remote
control holder

Parts

Q'ty

Parts

Q'ty

AAA alkaline
battery

Receiver
unit

Tapping screw

5/32” 5/8” ×

5/32” 15/32” ×

Clamp

No.No.

2

2

1

1

2PWHT

CN001

WHT

BLK

Indoor unit

Receiver PCB

Remote controller

Terminal board

WARNING

CAUTION

2-2. Accessories

2-3. Wiring the Receiver Unit

Connection diagram

Control of W-2WAY ECO-i SYSTEM

Connect the wire from the receiver unit to the indoor unit

remote controller terminal board. (The wire has no polar­ity.)

2-4. Precautions on Simultaneous Installation of

Wired Remote Controller and Wireless Remote
Controller

By installing a wired remote controller, the wireless remote
controller kit can permit dual remote control operation at the
same time.
(Up to 2 units of remote controllers - a wireless kit and a wired
unit - can be installed.)
Dual remote control operation can control 1 or multiple air
conditioners using several remote controllers.

Be sure to determine the correct terminal numbers on

the indoor unit when wiring the remote controller. The
remote controller will be damaged if high voltage (such
as 200 VAC) is applied.

The wireless remote controller kit components cannot

be used for more than 1 indoor unit at a time. (However,
separate receiver units may be used simultaneously.)

When a wireless remote controller kit and a wired re-

mote controller are used simultaneously, assign either
the wireless remote controller or the wired remote
controller as the sub remote controller unit.

3-10

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3-11

Control of W-2WAY ECO-i SYSTEM

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CN1

(optional)

(optional)

1

2

1 2

Indoor

unit

(sub)

(main)

Receiver unit

Remote controller
terminal board

Ground

Wireless remote

controller kit

Wired remote

controller

Remote control wiring (field supply)

When 1 indoor unit is operated with 2 remote controllers:

(The indoor unit runs according to which of the remote controllers is assigned as the main or sub unit.)

*

*

* Use field wiring cables with a

cross-sectional area of at least

0.5mm

2

to 2mm2.

* The maximum total length of

crossover cables must be no
longer than 400m.

CN1

(optional)

1 2

1 2

(optional)

Indoor

unit No.1

Indoor

unit No.2

Indoor

unit No.3

Indoor

unit No.4

Receiver
unit

(Main)

(Sub)

Remote controller
terminal board

When several groups of indoor units are operated with 2 remote controllers:

(The remote controller (main or sub unit) can operate with any indoor unit.)

Wireless remote

controller kit

Wired remote

controller
Remote control
wiring among the
control groups
(field supply)

* Use field wiring cables with a

cross-sectional area of at least

0.5mm

2

to 2mm2 .

* The maximum total length of

crossover cables must be no
longer than 200m.

**

Ground

Ground Ground

Ground

Fig. 3-6

Fig. 3-5

Receiver PCB

Receiver unit
cover

ON

123

4

Adjustable
corner cap

S003
Bit 1: OFF ON

2. Wireless Remote Controller

(1) To assign the wired remote controller as the sub unit,

locate the address connector at the rear of the wired
remote controller PCB and disconnect it. Reconnect it to
the sub unit position.

(2) To assign the wireless remote controller as the sub unit,

locate the dip switch [S003] on the wireless receiver unit
PCB. Set the No. 3 switch to the ON position.

AWG#20 to AWG#14

longer than 1320 ft.

AWG#20 to AWG#14

longer than 660 ft.

2-5. How to use the Test Run Setting

1. Set DIP switch [S003] No. 1 on the wireless receiver unit
PCB from OFF to ON.

2. All indicator lamps in the display section blink during test
run operation.

3. No temperature control is available during the test run.

4. After the test run, be sure to reset DIP switch No. 1 back
to the OFF position and check that no indicator lamps
are blinking. Then remount and attach the PCB cover as
before.

NOTE

To avoid placing excessive operating load on the equipment,
use this function only when conducting the test run.

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Fig. 3-7

Fig. 3-8

Fig. 3-9

Fig. 3-10

Panel

Intake grille

Side panel

Insert into groove on
side below “O” mark.

Vinyl tape

Standard screwdriver
(wrapped with vinyl tape)

Cover

Receiver unit

Clamp

Terminal board

2. Wireless Remote Controller

RCS-TRP80AAB.WL for 1 Way Air Discharge

Semi Concealed (A Type) and Ceiling-Mounted (T
Type)

2-6. Installing the Receiver Unit

(1) To take off the side panel, open the intake grille and re-

move the screw. Then remove the side panel by moving it
toward the front (direction of arrow). (Fig. 3-7)

(2) Wrap the end of a standard (flat) screwdriver blade with

vinyl tape. Then insert the screwdriver blade into the
groove on the side of the cover below the “O” mark, and
pry open the cover. (Fig. 3-8) (Take care not to scratch the
panel.)

(3) Pass the lead wire through the panel, then install the

receiver unit in the panel hole.

(The projections on the receiver unit engage the panel

holes to attach the unit.)

(4) Fasten the receiver lead wire to the fastener that holds

the louver motor wiring. (Fig. 3-9)

(5) Reattach the side panel.

(6) Route the lead wire from the receiver unit along the lou-

ver motor wiring and other wiring and fasten them with a
fastener. (Fig. 3-10)

* Access the hole at the top of the electrical component

box to draw in the wiring.

Control of W-2WAY ECO-i SYSTEM

NOTE

Do not twist the control wiring with the power wiring be-

cause this may cause malfunction.

Install a noise filter or take other appropriate action if elec-

trical noise disturbs the unit's power supply circuit.

* For the wiring and test run procedures, refer to “Wiring

the Receiver Unit” and “Test Run.”

3-12

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8

3-13

Control of W-2WAY ECO-i SYSTEM

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2

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5

6

7

8

2. Wireless Remote Controller

CN001

2PWHT

WHT

BLK

Indoor unit

Receiver unit

Remote
controller
terminal
board

1

1

1

2

2

Receiver unit

AAA alkaline battery

Remote control
holder

Tapping screw

5/32” × 5/8”

4

5

No. Q'ty No.

Parts

Q'ty

1

2

3

Remote control
unit

Parts

WARNING

CAUTION

2-7. Accessories Supplied with Unit

2-8. Wiring the Receiver Unit

Connection diagram

Connect the provided wire (already connected to the

receiver unit) to the indoor unit remote controller terminal
board. (The wire has no polarity.)

2-9.Precautions on Simultaneous Installation of

Wired Remote Controller and Wireless Remote
Controller

By installing a wired remote controller, the wireless receiver
unit can permit dual remote control operation at the same
time.
(Up to 2 units of remote controllers - a wireless remote con­troller and a wired remote controller - can be installed.)
Dual remote control operation can control 1 or multiple air
conditioners using several remote controllers.

Be sure to determine the correct terminal numbers on the indoor

unit when wiring the remote controller. The remote controller will
be damaged if high voltage (such as 200 VAC) is applied.

The wireless receiver unit components cannot be used for more

than 1 indoor unit at a time. (However, separate receiver units
may be used simultaneously.)

When a wireless receiver unit and a wired remote controller are

used simultaneously, assign either the wireless remote controller
or the wired remote controller as the sub remote controller unit.

(1) To assign the wired remote controller as the sub unit,

locate the address connector at the rear of the wired
remote controller PCB and disconnect it. Reconnect it to
the sub unit position.

(2) To assign the wireless remote controller as the sub unit,

locate the DIP switch [S003] on the wireless control unit.
Set the No. 3 switch to the ON position.

Control of W-2WAY ECO-i SYSTEM

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8

1

2

3

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8

1

2

3

4

5

6

7

8

CN1

1 2

1 2

1

2

(main)

(sub)

Indoor

unit

Control unit

Remote controller
terminal board

Ground

Remote control wiring (field supply)

(optional)

(optional)

Wireless receiver unit

Wired remote controller

When 1 indoor unit is operated with 2 remote controllers:

(The indoor unit runs according to which of the remote controllers is assigned as the main or sub unit.)

* Use field wiring cables with a

cross-sectional area of at least
AWG#20 to AWG#14.

* The maximum total length of

crossover cables must be no
longer than 1320 ft.

**

CN1

(optional)

1 2 2

1

2

1

2

1 2

1

2

(optional)

1

Indoor

unit No. 1

Receiver
unit

Ground

Remote controller
terminal board

Indoor

unit No. 2

Indoor

unit No. 3

Indoor

unit No. 4

(main)

(sub)

Remote control
wiring among the
control groups
(field supply)

Wired remote

controller

When several groups of indoor units are operated with 2 remote controllers:

(The remote controller (main or sub unit) can operate with any indoor unit.)

* Use field wiring cables with a

cross-sectional area of at least
AWG#20 to AWG#14.

* The maximum total length of

crossover cables must be no
longer than 660 ft.

* *

Wireless receiver

unit

Ground Ground Ground

Fig. 3-11

Fig. 3-12

S003
Bit 1: OFF ON

2. Wireless Remote Controller

2-10. How to Use the Test Run Setting

1. Set DIP switch [S003] No. 1 on the wireless receiver unit

2. All indicator lamps in the display section blink during test

3. No temperature control is available during the test run.

4. After the test run, be sure to reset DIP switch No. 1 back

PCB from OFF to ON.

run operation.

to the OFF position and check that no indicator lamps
are blinking. Then remount and attach the PCB cover as
before.

NOTE

To avoid placing excessive operating load on the equip-

ment, use this function only when conducting the test run.

The unit does not receive remote controller signals for ap-

proximately 1 minute after the power is turned ON. This is
not a malfunction. (The signals are received, but have no
immediate effect.)

3-14

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3-15

Control of W-2WAY ECO-i SYSTEM

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Fig. 3-13

1

3

2

4

6

5

Face plate

Remove

Screws

M4 ×25 or 5/32”×1”

Receiver unit

Spacer

2

(provided 7-7/8”
power cable)

Plate
mounting

Screws
M4 × × 1”25 or 5/32”

Screws

M4 × 1-37/64”× 40 or 5/32”

Wood
screws

1

2

3

4

5

No. Parts

Q'ty

No.

6

7

8

9

1

1

2

Parts Q'ty

4

2

1

1

Separate
receiver unit

Spacer

Wire joints

Clamp

Pattern template
3-47/64” × 2”

2

unit: in

2. Wireless Remote Controller

RCS-BH80AAB.WL for Concealed Duct(U Type) and Concealed Duct High-Static Pressure(D Type)

2-11. Accessories Supplied with Separate Receiver Unit

2-12. Important Information for Installation of 1

Separate Receiver Unit

<Installation location>

Do not install in a location where the air contains oil mist,

such as in a kitchen or factory.

Do not install next to a window, or in any other location

directly exposed to sunlight and outside air.

Do not install nearby devices which can be expected to

produce electrical noise, such as elevators, automatic
doors, and industrial sewing machines.

If the receiver unit is installed near a rapid-start type or

inverter-type fluorescent lamp (a lamp which does not
include a glow lamp), it may not be possible to receive
the wireless remote controller signal in some cases. In
order to prevent interference from fluorescent lamps, leave
a minimum of 6.6 ft between the receiver unit and the
fluorescent lamps, and install the receiver unit in a location
where it can receive the wireless remote controller signal
when the fluorescent lamps are lit.

2-13. How to Install the Separate Receiver Unit

NOTE

To avoid malfunction of the remote controller, do not

assemble or run remote control wiring together with the
power cables, and do not enclose them in the same metal
conduit.

When the power unit induces electrical noise, it is

recommended that a noise filter or the like be installed.

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5

6

7

8

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2

3

4

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3

4

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7

8

Fig. 3-14

Fig. 3-15

Fig. 3-16

Face plate

Notch where remote
controller cord passes
through top case

Remote controller
cord (optional)

Connector

Clamp

5/64”~1/8” mm

1 3

2

4

6

5

Remote controller cord

(optional)

Receiver unit

Clamp

Wood
screws (2)

2. Wireless Remote Controller

For flush mounting into a wall, install the separate receiver

unit in a metal switch box (field supply) that has been
recessed into the wall in advance.

1. Insert a flathead screwdriver or similar tool into the notch,
and remove the face plate.

2. Fix the receiver unit with 2 × M4 or 5/32" screws provided.
Do not overly tighten, and use the provided spacers. If the
receiver unit does not fit in the wall, cut spacers to adjust
the clearance.

3. Connect the receiver unit wiring (2-core cable) with the
cables extended from the indoor unit. (Refer to the section
on receiver unit wiring.)

Be sure to determine the correct terminal numbers on the

indoor unit when wiring the receiver unit.

The remote controller will be damaged if high voltage (such

as 200 VAC) is applied.

4. Reinstall the face plate.

When using exposed mounting for the receiver unit, install

onto a wall where the receiver unit can be attached.

1. Insert a flathead screwdriver or similar tool into the
groove on the bottom of the receiver unit. Pry open with
the screwdriver and remove the lower case. (Fig. 3-14).

2. In order to later pass the receiver wiring out through the
upper case (thin part at the top center), use nippers or a
similar tool to cut a notch in the same size as the remote
controller cord (optional). (Fig. 3-15)

3. Disconnect the wires that were connected to the connec­tor at the time of shipment.

4. Fasten the remote controller cord (optional) at the posi­tion shown in Fig. 3-16, using the provided clamp. Then
connect the cord to the receiver connector.

5. Shape the remote controller cord as shown in Fig. 3-16
so that it fits at the top inside the receiver unit, above the
PCB. Then attach the lower case. At this time, bend the
head of the clamp so that it faces sideways.

6. Remove the nameplate and use 2 wood screws to attach
the receiver unit.

7. Use the provided cord clips to fasten the remote controller
cord to the wall.

8. Reattach the nameplate.

If the separate receiver unit is installed on the ceiling, use

the provided ceiling mounting bracket for installation.

Control of W-2WAY ECO-i SYSTEM

3-16

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3-17

Control of W-2WAY ECO-i SYSTEM

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8

Fig. 3-17

Part (B)

Part (A)

Fig. 3-18

Fig. 3-19

2. Wireless Remote Controller

1. Insert a screwdriver or similar tool into the notch at the
bottom to remove the receiver nameplate.

2. Cut a section out of the ceiling along the provided paper
pattern (3 - 47/64" × 2").

3. Pass the wire through the provided mounting bracket and
insert the bracket into the installation hole. (Fig. 3-17)

4. Use bracket parts (A) and (B) to securely grip the ceiling
material. (Fig. 3-18)

5. Connect the receiver wire (2-core) to the wire from the
indoor unit.

(Refer to “Wiring the Receiver Unit.”)

Check the terminal number on the indoor unit before wir-

ing the receiver unit and be sure not to wire incorrectly. (The
unit will be damaged if high voltage, such as 200 VAC, is
applied.)

6. Adjust the provided spacers so that they are several mil­limeters larger than the thickness of the ceiling material.
Pass the 2 supplied screws (M4 × 40 or 5/32" ×1-37/64" )
through the spacers and tighten them enough to hold the
receiver unit in place.

7. Return parts (A) and (B) through the gap between the
ceiling and receiver unit so that they are contained in the
openings. Then tighten the screws.

Do not tighten the screws excessively. This may result in

damage or deformation of the case.

Tighten to the point where the receiver unit can be moved

slightly by hand. (Fig. 3-19)

8. Reattach the nameplate.

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5

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2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

2. Wireless Remote Controller

Wire of
receiver
unit (field
supply)

Power wire from
receiver unit

Separate
receiver unit

Connector

Indoor unit
remote controller
terminal board

1

2

1
2

WHT

BLK

Wire of receiver unit
(field supply)

Power wire from
receiver unit

1. Strip the insulation to approximately 35/64”

from the ends of the wires to be connected.

2. Twist together the 2 wires and create a
crimp connection at the wire joint.

3. If a special crimping tool is not used, or if
the connection is soldered, insulate the
wires using insulation tape.

Provided
wire joint
(WHT 2)

Wire joint

CE-1 (provided)

Remote controller cord (optional)

Separate
receiver unit

Indoor unit
remote controller
terminal board

1

2

WHT

BLK

1
2

2-14. Wiring the Separate Receiver Unit

* Use wires that are AWG#20 to AWG#14 in diameter.

* The wiring length must not exceed 1320 ft.

<Flush Mounting>

Connection diagram

Control of W-2WAY ECO-i SYSTEM

<Exposed Mounting>

Connection diagram

Use the remote controller cord (optional) for wiring the

separate receiver unit.

1. For the methods used to install the remote controller cord,
refer to “For flush mounting into a wall, install the sepa­rate receiver unit in a metal switch box (field supply) that
has been recessed into the wall in advance” on P. 3-16.

2. When using the remote controller cord (optional), refer to
the instruction manual that came with the cord.

Check the terminal number on the indoor unit before wir-

ing the remote controller and be sure not to wire incor­rectly. (The unit will be damaged if high voltage, such as
200 VAC, is applied to it.)

3-18

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8

3-19

Control of W-2WAY ECO-i SYSTEM

1

2

3

4

5

6

7

8

2. Wireless Remote Controller

Separate

receiver unit

(main)

Separate

receiver unit

(sub)

(optional)

Remote controller
terminal board

Wire of the receiver unit (field supply)

Indoor

unit

1

2

1

2

2

1

Ground

1 2

1 2

1 2

1 2

1 21 2

Indoor

unit No. 1

Indoor

unit No. 2

Indoor

unit No. 3

Indoor

unit No. 8

Remote controller
terminal board

Separate

receiver unit

(main)

(optional)

Separate

receiver unit

(sub)

(optional)

Crossover cables of the
receiver unit for the
control groups (field supply)

Ground

Ground Ground Ground

2-15. Important Information for Installation of 2

Separate Receiver Units

When using 2 receiver units to operate 1 or more indoor units
at the same time, follow the procedure below to install them.

Installation method

1. If 2 remote controllers are installed, set one of them as

the “main remote controller” (setting at time of factory
shipment).

2. At the other remote controller, remove the receiver name-

plate and switch the DIP switch to “sub remote controller.”
Under these conditions, the receiver unit functions as the
sub receiver unit.

* The TIMER lamp lights only at the remote controller

that receives the signal.

Basic wiring diagram

* When connecting the wires, be careful not to wire

incorrectly.
(Incorrect wiring will damage the unit.)

Using 2 separate receiver units to control 1 indoor unit:

Using 2 separate receiver units to control a group of multi-

ple indoor units:

* The main and sub receiver units will operate regard-

* Use wires that are AWG#20 to AWG#14 in diameter.

* The wiring length must not exceed 1320 ft.

* Use field wiring cables with a cross-sectional

area of at least AWG#20 to AWG#14.

* The maximum total length of crossover cables

must be no longer than 1320 ft.

less of the indoor unit in which they are installed.

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3

4

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7

8

2. Wireless Remote Controller

2-16. Test Run Setting

1. Remove the receiver unit face plate, and set the DIP

switch to “Test Run - ON” position.

2. Run the air conditioner using the wireless remote control-

ler by pressing the “ON/OFF” button.

All LEDs (“RUN,” “TIMER” and “STANDBY”) blink during

test run operation.

No temperature control is effective with the wireless re-

mote controller in the “Test Run - ON” position.

To avoid mechanical strain on the air conditioner, do not

use this mode except for conducting a test run.

3. Select any one of the operation modes HEAT, COOL or

FAN for the test run.

* The outdoor unit will not start running for about 3 min-

utes after the power ON button is pressed.

4. After the test run operation, stop the air conditioner using

the wireless remote controller, and then reset the DIP
switch in the receiver unit as it was before. (To prevent
constant test running of the air conditioner, the receiver
unit has a 60-minute off timer function.)

Control of W-2WAY ECO-i SYSTEM

3-20

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8

3-21

Control of W-2WAY ECO-i SYSTEM

1

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3

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6

7

8

KHX0752 / 0952 / 1252 / 1852

KHX2452

Setting at time of
factory shipment

Setting at time of
factory shipment

Slide No. 3 on SW101
from ON OFF.

Slide No. 3 on SW101
from ON OFF.

CR-KR74GXH56A-0

CR-KR254GXH56A-0

2. Wireless Remote Controller

RCS-SH1AAB for Wall-Mounted (K Type)

2-17. When Using Wireless Remote Controller Instead Of Wired Remote Controller

When the wireless remote controller is to be used, slide the switch on the indoor unit control PCB.

• If this setting is not made, an alarm will occur. (The operation lamp on the display blinks.)

• This setting is not necessary if both the wired remote controller and wireless remote controller are used.

• The location of the switch varies depending on the type of PCB used. Check the model name before making the
setting.

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8

3. Timer Remote Controller

15 141617232527

29 26

2830 182122

2024

121 2 5 73 86 9 31104 11 13

Operating buttons

Display

8

10

9

13

11

12

1

3

4

7

2

5
6

Timer Remote Controller/RCS-TM80BG

How to Use the Timer Remote Controller

Control of W-2WAY ECO-i SYSTEM

3-22

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3-23

Control of W-2WAY ECO-i SYSTEM

1

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8

3. Timer Remote Controller

Names and Operations

Operation Section (Refer to the previous page)

1. Start/Stop button

Pushing this button starts, and pushing again stops the
unit.

2. Operation lamp

The lamp is turned on when an air conditioner is in opera­tion.
This lamp blinks when an error occurs or a protective
device is activated.

3. Mode Select button

Pushing this button to select an operation mode. (AUTO

/HEAT /DRY /COOL /FAN ).

4. Temperature setting buttons

Changing the temperature setting.

5. FAN speed button

Changing the fan speed.

6. Swing/Air direction button *1

Use this button to set the auto swing or air direction to a
specific angle.

7. Unit Select button

When more than one indoor unit is operated by one re­mote control unit, this button is used to select a unit when
adjusting the air direction.

8. Timer setting buttons

( Weekly Program Function)

9. FILTER reset button

Use this button to reset the filter sign.
When is displayed, press this button after cleaning the
filter.

10. Ventilation button

Use this button when you installed a fan available in the
market. Pressing this button turns on and off the fan.
When turning off the air conditioner, the fan will be also
turned off.
(While the fan is operating, will appear in the display.)
*If is displayed on the LCD of the remote control unit
when pressing the ventilation button, no fans are installed.

11. Inspection button

Do not use this button.

12. Sleeping button

( Sleeping Function)

13. Remote control sensor

Normally, the temperature sensor of the indoor unit is
used to detect the temperature. However, it is also pos­sible to detect the temperature around the remote control
unit.

*1 Do not move the flap (vertical airflow adjustment board)

with your hand.

The flap is automatically directed down when the unit is

stopped.

The flap is directed up during the HEAT standby. The

flap starts swinging after the HEAT standby is can­celled, although the AUTO flap indication on the remote
control unit is displayed during the HEAT standby.

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3

4

5

6

7

8

3. Timer Remote Controller

Display Section (Refer to the page 3-22)

Control of W-2WAY ECO-i SYSTEM

1. SETTING indication

Appears when the timer program is being set.

2. UNIT indication

Indicates the unit No. of the indoor unit which is selected
with the Unit Select button, or the unit in which an abnor­mality occurs.

3. TIMER No. indication

Appears when the time program is being set.

4. Timer program

: The indoor unit starts operation at the programmed

time.

: The indoor unit stops operation at the programmed

time.

5. Today’s day of the week

Indicates today’s day of the week.

6. Program schedule indication

Appears under days that are scheduled for program op­eration.

7. Present time

Displays the present time on a 24-hour clock. Also also,
displays settings in the various setting modes.

8. TIMER OFF indication

Displayed when the timer has been turned OFF.

9. ERROR indication

Displayed when a mistake is made during timer setting.

10. Outing indication ( Outing function)

Appears when the outing function is set.

11. Upper and lower limit indication of the outing func­tion

: Indicates the upper limit of the temperature
: Indicates the lower limit of the temperature

12. Operation Mode indication

Displays the selected operation mode. (AUTO /HEAT
/DRY /COOL /FAN ).

13. Temperature indication

Indicates the set temperature.

14. °F / °C temperature unit indication

15. Remote control sensor indication

Appears when the remote control sensor is used.

16. Centralized control indication

Appears when operated in centralized control. If the
remote control operation is not permitted to the remote
unit, when the Start/Stop button, Mode Select button or
Temperature setting button is pressed, flashes and
rejects the change.

17. Operation mode change control indication

Displays when an operation mode is entered by the re­mote control unit, while another operation mode has been
already selected. This indicates that the operation mode
cannot be changed.

18. Disabled Feature indication

Displayed if the selected feature was disabled during
installation.

20. Heating standby mode indication

appears when the fan of the indoor unit is stopped or in

low fan speed.

21. / / / Fan mode select indication

The selected fan mode is displayed.

22. SWING indication

Appears while the flap swings.

23. Flap position indication

Indicates the flap position.

24. Filter indication

Appears when filter needs cleaning. Clean the filter.

25. Inspection indication

Appears when the protective device is activated or when
an abnormality occurs.

26. Ventilation indication

Appears when a fan available in the market is installed
and is operating.

27. Oil indication

Appears when the engine oil needs to be changed. (Ap­pears when the gas heat pump air conditioner is used.)

28. Sleeping

Appears during the sleeping function.

29. CAUTION

Appears when the protective device is activated or when
an abnormality occurs.

30. Unit No. indication

Indicates the unit No. of the selected indoor unit.

31. TEST indication

Appears while in test operation.

3-24

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3-25

Control of W-2WAY ECO-i SYSTEM

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8

3. Timer Remote Controller

(with 8 in.
wire)

Remote controller Wood screws Wire joints Operation manual Installation manual

CAUTION

Fig. 3-20

Ground

Connection diagram

Basic Wiring Diagram

Terminal board for
indoor unit remote
controller wiring

Remote controller wiring
(field supply)

Connector

Remote
controller
unit

Power wire from remote
controller unit

Approx.
8 in.

1

2

1

2

W

BK

Shielded wire

INSTALLATION MANUAL FOR TIMER REMOTE CONTROLLER

Accessories for remote controller switch

How to install the remote controller

Do not supply power to the unit or try to operate it until the tubing and wiring to the outdoor unit is

completed.

Do not twist the control wiring with the power wiring or run it in the same metal conduit, because

this may cause malfunction.

Install the remote controller away from sources of electrical noise.
Install wiring correctly(incorrect wiring will damage the equipment).
Install a noise filter or take other appropriate action if electrical noise affects the power supply circuit

of the unit.

When wiring, do not connect the remote controller wires to the adjacent terminal block for the power

wiring. Otherwise, the unit will break down.

Use shielded wires for remote control wiring and ground the shield on indoor unit sides. (Fig. 3-20)

Otherwise misoperation due to noise may occur.

The mounting position for the remote controller should be located in an accessible place for control.
Never cover the remote controller or recess it into the wall.

(1) When you open the decorative cover (Fig. 3-23), you will see 2 gaps under the remote controller.

Insert a coin into these gaps and pry off the back case.

(2) Attach the back case with the 2 wood screws provided. Using a screwdriver, push open the cut-outs on the back case.

These holes are for screws. (Fig. 3-24)

(3) Connect the remote controller wiring (2 wires) correctly to the corresponding terminals in the electrical component box of

the indoor unit.

(4) To finish, fit the back tabs of the case into the remote controller and mount it.

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8

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2

3

4

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6

7

8

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2

3

4

5

6

7

8

3. Timer Remote Controller

Fig. 3-21

Remote controller wiring

Power wire from remote
controller unit

Provided wire joint (white)

Wire joint

(sub)

2P terminal
base for remote
control wiring

Remote controller

(main)

1

Indoor unit

No. 1

: Ground (earth)

Indoor unit

No. 2

Indoor unit

No. 8

Indoor unit

No. 3

Connection wiring
for group control

1

1

1

2

2

2

2

1

2

1

2

Fig. 3-22

RCU. Main/Sub

MainSub

CODE

ITEM

DATA

ITEM

Clock display

12 hours

(AM/PM)

24 hours

RCU. CK

NormalRCU. CK

Room temperature sensor

Main unit RCU

CODE

ITEM

DATA

ITEM

Vent. button YesNo

Temperature unit

o

F

o

C

Use AWG#20 to AWG#16 wires.

Remote controller wiring can be extended to a maximum
of 1640 ft.

(1) Strip the insulation to approximately 35/64" from the ends

of the wires that will be connected.

(2) Twist together the 2 wires and create a crimp connection

at the wire joint.

(3) If a special crimping tool is not used, or if the connection

is soldered, insulate the wires using insulation tape.

Group control using 2 remote controllers

It does not matter which of the 2 remote controllers you
set as the main controller. When using multiple remote
controllers (up to 2 can be used), one serves as the
main remote controller and the other as the sub-remote
controller.

Control of W-2WAY ECO-i SYSTEM

Remote controller setting mode

To set the remote controller main/sub setting or change the sensor, follow the steps below.

Press both and buttons on the remote controller for more than

4 seconds together.

Select CODE No. with buttons.
Change DATA with (TIMER) buttons.

Press . Finally, press .

* DATA is memorized in the RCU. (DATA setting will not be changed even

when the power is turned off.)

* Make sure to set [Normal] for RCU. CK.

Indoor unit setting mode

To select the ventilation setting or change the temperature unit, follow the steps below.

Press + + buttons on the remote controller for more than 4 sec-

onds together.

Select CODE No. with buttons.
Change DATA with (TIMER) buttons.

Press . Finally, press .

* DATA is memorized in the indoor unit. (DATA setting will not be changed

even when the power is turned off.)

To display the sensor temperature:

Press both and buttons on the remote controller for more than 4 seconds together.
Change the sensor address (CODE No.) with buttons.

To display the trouble history:

Select the UNIT No. which you want to call with the button.
Press the button to finish service mode.

Press both and buttons on the remote controller for more than 4 seconds together.
Change the alarm message: buttons

Press the button to finish service mode.

CODE No.

(New) (Old)

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3-27

Control of W-2WAY ECO-i SYSTEM

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Fig. 3-23

Fig. 3-24

5/32

7/64

4-23/32

4-23/32

5/8

1-1/2

11

3/16 × 3/8

53/64

4-13/32

15/16

11/64 × 3/8

1/16

11/64 × 3/8

3/16 × 27/64

1-13/16

3-9/32

4-35/64

3. Timer Remote Controller

Caution when installing the remote controller

*1 Install the remote controller more than 3-3/8" apart from the wall surface.
*2 To install the remote controllers side-by-side, keep the space between each for more than 4-59/64".
*3 To install the remote controllers one above the other, keep the space between each for more than 1".

unit :in.

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Control of W-2WAY ECO-i SYSTEM

3. Timer Remote Controller

Setting the Present Time

1. Press and hold for more than 2 seconds to enter in the present
day and time setting mode.

Once you enter in the setting mode, , “ ”(day) and “time” flash.

2. Set “ ” to today’s day of the week.

Press *1 to move “ ” (flashing on the display) in the order of :

Su Mo Tu .... Press to move it in the order of : Su St

Fr ....

*1

While in time setting mode, the temperature setting buttons function as

(changing day) button.

3. Press to change the present “hour” in the range of 0 to 23*2.

Set the present hour and press .
The “hour” digits light up, and the “minute” digits start flashing.

*2

If the clock uses the 12 hours AM/PM setting, the hour is displayed in the range of AM 0 to

11/PM 0 to 11.

4. Press , to change the present “minute” in the range of 0 to 59.

Set the present minute and press . The day and time are set and finishes the setting mode.

Note

• The unit returns to the normal mode if is pressed or there is no operation made for 3 minutes

during the setting. In this case, all the settings in progress will be lost.

• If the present time is invalid, “– – : – –” is displayed.

If the power failure for more than 1 hour occurs, check if the set data of day and time are valid.

3-28

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3-29

Control of W-2WAY ECO-i SYSTEM

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3. Timer Remote Controller

1
2
3
4
5
6

Su Mo Tu We Th Fr Sa

31

TIMER No. 1~6

program CHeck

2

Weekly Program Function

Checking Weekly Timer

Set the weekly program assigning a given timer to each day of the week.
Maximum of 6 programs a day and 42 programs a week can be set.
Select the day and the TIMER number you want to program.

Program image diagram

Vertical scale indicates the TIMER No.,
and horizontal scale indicates the day.

* If the day is changed, the TIMER No.

returns to “1”.

TIMER No.

button

Select a section from
the 42 programs.

1. Press to enter the program confirmation mode
“ ” and start setting.

Once you enter the program confirmation mode, the
present day is indicated as TIMER No. “1”.

2. Select the day.

Press and / to move the “ ” horizon­tally on the day to select.
Press to move “ ” (flashing on the display) in the

order of : Su Mo Tu....

Press to move it in the order of : Su Sa Fr....

“– – : – –” is displayed when the program is not set.

3. Select a Timer number.

Press / to select a TIMER No. from 1 to 6.
Press to move up from 1.
Press to move down from 6.

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3. Timer Remote Controller

1,2,3,4 4

2,3,4

SET

SET

SET

SET

CANCEL,DEL

normal remote controller

program check

PROGRAM CANCEL

CANCEL,DEL

CANCEL

PROGRAM

SET,CANCEL,DEL

SET,CANCEL

Changing the Program Timer

To set the weekly program, follow the steps below.

1. Select the program you want to set in the program
confirmation mode, and press . The enters the
setting mode of the program currently displayed.

* In the program setting mode, , “hour”,

“minute” and “item” flash on the display.

2. Set the “hour”. (program step 1)

Press / to set the “hour”.
Confirm the “hour” and press . The enters the pro­gram changing mode (setting of the “minute”).

3. Set the “minute”. (program step 2)

Press / to set the “minute”.
Confirm the “minute” and press .The unit enters
(the program pattern selection mode).

Control of W-2WAY ECO-i SYSTEM

Program step1

Program

Program step2

Changing hour digits

Changing minute digits

Changing patterns

Selecting copy source

Selecting copy destination

3-30

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3-31

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3. Timer Remote Controller

Weekly Program Function (Continued)

4. Set the program pattern.
(program step 3)

There are 4 program patterns.

Pressing / repeats the following display patterns.

Pattern 1

The indoor unit starts operation at the programmed
time.

Pattern 2

The indoor unit stops operation at the programmed
time.

Pattern 3

The indoor unit starts operation at the programmed
time and changes the temperature settings.

Press / to change the temperature setting.

Pattern 1

Pattern 2

Pattern 3

Pattern 4

Pattern 4

The indoor unit changes the temperature setting at
the programmed time.

Press / to change the temperature setting.

Select the program pattern and press . The program timer setting is confirmed and the unit enters the confirmation mode .

Note

If you press during the setting, it returns to the program confirmation mode.
If there is no operation made for 3 minutes during the setting, it returns to the normal mode.

In this case, all the settings in progress will be invalid.

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3. Timer Remote Controller

435 1 2

Deleting the Program Timer

To delete the program timer setting, follow the steps below.

1. Press to enter the program confirmation mode.

2. Press / to select the day of the program you want to de­lete.

3. Press / to select a TIMER No. (from 1 to 6).

4. Press to display the program setting mode .

5. Press to delete the program.

Note

After deleting, the unit returns to the program confirmation mode .
If you press during the setting, the unit returns to the program

confirmation mode.

If there is no operation made for 3 minutes during the setting, the unit re-

turns to the normal mode.

Invalidating Program Timer

Control of W-2WAY ECO-i SYSTEM

If you want to adjourn the program operation for more than 1 week, you can
invalidate all the timer settings.
Once the timer settings are invalidated, the program will not be operated until the invalidation is cancelled.

<<How to invalidate the program timer>>

Press and hold for more than 2 seconds.

is displayed and the programs will be invalidated from the next one.

<<How to cancel the program timer invalidation>>

Press and hold for more than 2 seconds.

disappears and the programs will be validated from the next one.

If Power Failure Occurred

If the power recovers in a short time period, the program after the recovered time will be valid.
If the power recovered more than 1 hour after the failure, the present time information will be lost. In this case, the program will
not be operated.

3-32

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3-33

Control of W-2WAY ECO-i SYSTEM

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3. Timer Remote Controller

3,51 2,4

Weekly Program Function (Continued)

Duplicating the Program Timer

You can duplicate the preset program by day.

Select the copy source.

1. If is pressed in program checking mode , it enters
the copy mode (Selecting the copy source ) of the pro­gram timer.
While in the copy mode of the program timer, and

(day) of the copy source flash on the display.

2. Press / to select the day of the copy source.
Select the copy destination.

3. If is pressed in the mode of selecting the copy source

, it enters the copy mode (Selecting the copy destina-

tion ) of the program timer.

4. Press / to select the day of the copy source.
Then, press to complete copying and return to the
program checking mode.

Note

The program will be overwritten if the preprogrammed day is selected as a copy source.

Before Asking Repair Work

Before asking repair work, please check the followings.

Trouble Possible Cause/Remedy

“ERROR” is displayed when the
minute digits are entered.

The set data is not stored. The stored programs are automatically sorted by the time. Check if the data is stored in the other TIMER No.

Program does not function.

If there is another TIMER No. which has the program of the same time and same day, you cannot overlap the
setting.

Check if the time indication is not “– – : – –”.
When the time is invalid, the program is also invalid.

Check the remote controller prohibition inside.
In that case, the program is invalid.

Control of W-2WAY ECO-i SYSTEM

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F

F

F

F

3. Timer Remote Controller

Outing Function

Outing function is a function that prevents the room temperature from increasing too much (or decreasing too much) when no
one is in the room.
An air conditioner works automatically if this function is set effective.

General Performance of the Outing Function

COOL / DRY

The air conditioner starts operation when the room tem-

perature increases up to –1°F of the upper limit.

The air conditioner stops operation when the room tem-

perature decreases up to –2°F of the upper limit.

HEAT

The air conditioner starts operation when the room tem-

perature decreases up to +1°F of the lower limit.

The air conditioner stops operation when the room tem-

perature increases up to +2°F of the lower limit.

[Precautions]

The outing control only starts/stops the air conditioner. It does not change the operation mode/temperature setting.

Therefore, the operation mode/temperature needs to be set beforehand so that the outing function turns on the air condition-

er with your desired operation mode/ temperature setting.

If the room temperature rapidly changes, the room temperature may get over the upper or lower limit when the outing func-

tion is activated.

The outing function is invalid during FAN/AUTO operation mode.
The air conditioner's stop order (stated in /above) is valid only when the outing function is operated.

If operated using other remote control unit (or a centralized control device such as a system control), the outing function does

not work.

Outing function upper limit

Room temperature

Room temperature

Outing function Lower limit

3-34

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3-35

Control of W-2WAY ECO-i SYSTEM

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2

3

3. Timer Remote Controller

Outing Function (Continued)

Setting the Outing Function

1. Press and hold for more than 2 seconds to display the upper limit temperature

setting screen.

, and the upper limit temperature start flashing.

(The default value of the upper limit temperature is 99 °F.)

2. Press / to select the upper limit temperature and press to fix the
value. The lower limit temperature setting screen is displayed.

3. Press / to select the lower limit temperature, and press to fix the
value. The outing function setting is completed. (The default value of the lower limit
temperature is 50 °F.)

* The unit returns to the normal mode if is pressed or there is no operation made for 3

minutes during the setting. In this case, all the settings in progress will be lost.

Canceling the outing function

Press and hold for more than 2 seconds while the outing function is set.

Outing function indication

Outing function indication Status

Off The outing function is not set.

Flashing The outing function is now being set, or under operation.

Lighting Although the outing function is set, not under operation.

Note

A remote controller loses outing function operation information when it is cut for more than one hour during the outing function
operation by electricity. It reverts from the blackout, and an air conditioner does not drive in outing function when operation is
started. At this time, an air conditioner does not stop at outing function.

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3. Timer Remote Controller

Sleeping Function

* This function leads you to a comfortable sleep and chang-

es the room temperature during your sleep.

* You can set the off timer every one hour from 1 to 10

hours.

Operating time

Sleeping function
indication

Display of remote control unit (dur­ing sleeping function setting)

Display of remote control unit
(during the time setting)

Off time

In case the present time
is 23:00.

Control of W-2WAY ECO-i SYSTEM

When the off time comes:

The indoor unit stops.

* The temperature returns to the setting at the time when

sleeping function operation started.

To cancel the sleeping function operation:

Press .

* The temperature setting remains at the time cancelled.

The following buttons also cancel the sleeping function

operation.

button
Stop the indoor unit after the sleeping function operation
is cancelled.

button
Changes the operation mode after the sleeping function
operation is cancelled.

Sleeping function indication

* If no operation is made for 3 minutes, the time setting

mode will be automatically finished.

Ex. In case of 7 hours timer

1. Press .
Each time the button is pressed, the indication changes in

the following order.

(every one hour)

(Press to stop the time setting.)

2. Press .
The sleeping operation starts.

3-36

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3-37

Control of W-2WAY ECO-i SYSTEM

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3. Timer Remote Controller

Sleeping Function (Continued)

If button does not work.

Or if the operation does not start even if is pressed.

Check the following table.

Item Display of the remote control unit

1

(for several seconds).

2

3

The sleeping function operation will be cancelled in the following cases:

1: When the unit is operated to stop or change the temperature setting by the other remote control unit or centralized control device.

2: When the unit is operated to stop or change the temperature setting with the weekly program function / outing function.

3: When the centralized control unit is prohibited from stopping the unit or changing the temperature setting.

“This function is not available” indication lights up

(for several seconds).

Centralized control indication flashes

(for several seconds).

(Lighting/flashing indication)

The Error indication flashes

The clock is not set.

When the operation mode is set to AUTO or FAN, this function is not
available.

The centralized control device is prohibited from starting/ stopping the
unit or change the temperature setting.

Contents

Note

Trouble Possible Cause/Remedy

The temperature setting does not decrease (increase). The temperature over the upper or lower limit or each operation mode

cannot be set.

Operation under the sleeping function does not finish. Note if you change the time after the sleeping function started. The

operation does not finish until it reaches to the set starting time.

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4. System Controller

System controller / SHA-KC64UG

�

Example of central control with system controller (individually controlled)

New control wiring system (S-net link system)

�

New control wiring system (S-net) allows connection of as many as total of 94 units (64 Indoor unit

+30 Outdoor unit) to a single contorl line (non-polar twin-line main bus).

�

The main bus is twin-core and non-polar for easier wiring.

�

Using concurrently as remote controller, system controller can control maximum up to 64 indoor units (or

groups) individually.

�

The system without remote controller can be formed.

�

Maximum up to 2 system controllers (1 main, 1 sub) can be installed.

�

It can separate the 64 indoor units into 4 zones and control each zone individually.

�

Maximum up to 16 groups can be registered to each zone.

�

Collective control and individual group (unit) control can be performed also.

�

Alarm and operation output for an external collected signal is available (potential free contact) DC24V

Max. 1A.

�

Input terminal for collective operation on / off is available.

Outdoor unit

Remote
controller

System
controller
(main)

System without
Remote controller

Group
control

Outdoor unit

2157_M_I

System
controller
(sub)

Remote
controller

Group
control

Group
control

Remote
controller

Control of W-2WAY ECO-i SYSTEM

3-38

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Control of W-2WAY ECO-i SYSTEM

4. System Controller

How to use the system controller

A:ALL/ZONE/GR SELECT button

Use this button to select one of following:

ALL: Used for turning all the air conditioners on and off.

ZONE:

GR:

A maximum of four zones and 16 groups (units) in a zone
can be set.

B:ZONE select butoon Use this button to select a zone (1 to 4) to operate individually.

C:GROUP select buttons Use these buttons to select a group (1 to 16) to operate individually.

A:ALL/ZONE/GR
SELECT button

B:ZONE select
button

C:GROUP select
buttons

F:Operation lamp

D:ON button

E:OFF button

G:MODE button

H:Temperature
setting buttons

O:VENTILATION
button

K:CHECK
button

L:CENTRAL

CTRL

button

N:CL button

M:SET button

J:FLAP button

I:FAN SPEED
button

ALL

ZONE2

GR2

UNIT

GR1
UNIT
UNIT

GR1
UNIT
UNIT
UNIT

GR3
UNIT

GR2

UNIT

GR3

UNIT

NOTE

ZONE1

2130_M_I

Used for turning all the air conditioners of each zone on and
off.

Used for turning all the air conditioners of each group on and
off.

Control of W-2WAY ECO-i SYSTEM

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When the indication is displayed, you cannot change the
mode from and or to or and . To change the
mode, turn off all units once then select the mode again.

D:ON button This button is for turning the selected air conditioner on.

E:OFF button This button is for turning the selected air conditioner off.

F:Operation lamp This lamp lights when the unit is turned on.

G:MODE button Use this button to select one of the following five operations:

(AUTO) : Used to automatically set cooling or heating operation.

Only for heat pump type

(temperature range: 62 ~ 80 °F)

(HEAT) : Used for normal heating operation.

(DRY) : Used for dehumidifying without changing the room temperature.

(COOL) : Used for normal cooling operation.

(FAN) : Used to run the fan only, without heating or cooling operation.

H:Temperature
setting buttons

: Press this button to increase the temperature setting.
: Press this button to decrease the temperature setting.

I:FAN SPEED button

(AUTO) : The air conditioner automatically decides the fan speed.

(HI.) : High fan speed.

(MED.) : Medium fan speed.

(LO.) : Low fan speed.

J:FLAP button 1. Use this button to set the airflow direction to a specific angle.

The airflow direction is displayed on the remote control unit.

• In the cool mode and dry mode, when the flaps are set

in a downward position, condensation may form and drip
around the vent.

• Do not move the flap with your hands.

This function is available only for models X, A and T.

( )

2. Use this button to make the airflow direction sweep up and down
automatically.

Press this button several times until the ( ) symbol appears on
the display.

This function is available only for models X, A, K and T.

1) The flap setting can be performed only for units that have no remote
controllers.

2) In the ALL or ZONE mode, no flap setting can be performed. If
necessary, you should select the GR mode and use the FLAP button.

NOTE

Operation mode

(COOL) or (DRY)
(HEAT) or (FAN)
(AUTO)

Cooling mode:
Heating mode:

Number of airflow direction settings

3
5

3
5

NOTE

Functions of buttons

(Continued)

NOTE

NOTE

( )

Only for heat pump type

(temperature range: 60 ~ 78 °F)

(temperature range: 64 ~ 86 °F)

(temperature range: 64 ~ 86 °F)

4. System Controller

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Control of W-2WAY ECO-i SYSTEM

K:CHECK button This button is used only when servicing the air conditioner.

Do not use the CHECK button for normal operation.

L:CENTRAL

CTRL

button Use this button to inhibit individual operation by remote controller as

follows:

1: Individual ON/OFF operation is inhibited.
2: Individual ON/OFF, MODE and Temperature setting operation is
inhibited.
3: Individual MODE and Temperature setting operation is inhibited.
4: Individual MODE operation is inhibited.

No indication: Central control is cleared.
(Individual operation)

M:SET button This button is used for setting indoor unit's address when installing the

air conditioner.

Do not use the SET button for normal operation.

N:CL button Use this button to reset the filter sign .

The air conditioner has the timer for the filter and informs you when the
filter needs cleaning.

O:VENTILATION button Use this button when you installed a fan available in the market.

Pressing this button turns on and off the fan.

When turning off the air conditioner, the fan will also turned off. While
the fan is operating, will appear in the display.

If is displayed when pressing the ventilation button, no fans are
installed.

NOTE

2132_M_I

4. System Controller

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4. System Controller

When turning on the power switch of the system controller, sign

Control of ECO MULTI SYSTEM

A: When the unit is in the heating standby mode, the indicator appears.
B: The currently selected operation mode is displayed.
C: The currently selected FAN SPEED, Airflow Direction and SWEEP

settings are displayed.

D: This indication appears when the filter needs cleaning.
E:

This indication appears only when an abnormality occurs within a unit.

F: The currently selected mode (ALL, ZONE or GROUP), ZONE number

and GROUP number are displayed.

GROUP number display (no figure: no number registered)

GROUP state display ( : registered group, : currently
selected group)

Operation state display ( : on,

no sign: off,

: alarm)

G :

The currently selected central control mode (1, 2, 3 or 4) is displayed

H:

Lights when any of the air conditioners under the system control is
operating; tuens off when none of the air conditioners under the system
control is operating. Blinks when any conditioner is operating under
abnormal conditions and its protection functionality is working.

I:

When the button is pressed for more than four seconds, the TEST
indicator appears.

J :

This indication appears when the temperature is set.

K :

blinks for a few minutes. While blinking, any controls using the system
controller are inhibited. This is because the system controller is verifying
connected groups.

Description

A

B

C

D

E

F

G

H

I

J

K

2133_M_I

Disp lay

Control of W-2WAY ECO-i SYSTEM

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4. System Controller

How to start group operation

To start group operation

The flap setting can be performed only for units that have no remote
controllers.

NOTE

Power Turn the power supply switch on more than 5 hours before starting operation.

1

Press the SELECT button and select GROUP.

2

Select the ZONE No. including the group to be operated by pressing ZONE button.

3

Select the GROUP No. to be operated by pressing GROUP select buttons .

4

Press the ON button.

5

Set the operation mode by pressing the MODE button.

6

Set the desired temperature by pressing one of the temperature setting buttons .

7

Set the desired fan speed by pressing the FAN SPEED button.

8

Set the airflow direction to a specific angle or sweep mode.

9

By pressing , select your desired setting.

Individual: Controls with the remote controller are possble.

Central 1: Individual ON/OFF operation with the remote controller is inhibited.
Central 2: Individual ON/OFF, MODE, and Temp. setting operations with the remote

controller are inhibited.

Central 3: Individual MODE and Temp. setting operations with the remote controller are

inhibited.

Central 4: Individual MODE operation with the remote controller is inhibited.

• Under Central/Individual settings other than listed above,

“CENTRAL

” is displayed.

AUTO Depending on the difference between the temperature setting and the room temperature,
Operation heating and cooling alternate automatically so that a uniform room temperature is maintained.

Stop Confirming the GROUP No. to be selected, press the OFF button.

8

9

1

2

5

6

7

3

Stop

4

2134_M_I

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

4. System Controller

Control of ECO MULTI SYSTEM

How to start collective operation

To start collective operation (ALL or ZONE)

In the ALL or ZONE mode, no flap setting can be performed. If necessary, you
should select the GR mode and use the FLAP button

NOTE

Power Turn the power supply switch on 5 hours or more bofore starting operation.

1

Press the SELECT button and select ALL or ZONE.
In case of ZONE collective operation.

2

Select the ZONE No. to be operated by pressing ZONE button.

3

Press the ON button.

4

Set the operation mode by pressing the MODE button.

5

Set the desired temperature by pressing one of the temperature setting buttons .

6

Set the desired fan speed by pressing the FAN SPEED button.

7

Select the control mode.

Stop Confirming the ZONE No. to be selected or ALL indication, press the OFF button.

7

2

1

5

6

4

Stop

3

2135_M_I

Control of W-2WAY ECO-i SYSTEM

3-44

1

2

3

4

5

6

7

8

3-45

1

2

3

4

5

6

7

8

Control of W-2WAY ECO-i SYSTEM

4. System Controller

3

Control of ECO MULTI SYSTEM

■ How to install the system controller

Fig. 3-25

2041_C_I

System
controller

Switch box
(no cover)

M4 × 30 or 5/32” × 1-3/16”
Screws (2)

Flat-top
Screw

Back case

Gap

Coin

2042_M_I

Gap

Fig. 3-26

Do not supply power to the
unit or try to operate it until
the tubing and wiring to the
outdoor unit is completed.

9-1. System Controller Installation

● Do not twist the control
wiring with the power
wiring or run it in the
same metal conduit,
because this may cause
malfunction.

● Install the system con­troller away from sources
of electrical noise.

● Install a noise filter or
take other appropriate
action if electrical noise
affects the power supply
circuit of the unit.

● If local codes allow, this system controller can be
mounted using a conventional wall box for flush
mounting.

(1) Remove the flat-top screw on the bottom of the

back case. When you open up the decorative
cover, you will see two gaps under the system
controller. Insert a coin into these gaps and
remove the back case. (Figs. 3-25, 3-26)

(2) Connect the wires to terminal base of the system

controller (see next page).

(3) Attach the back case with the 2 × M4 or 5/32” screws

provided.

(4) To finish, fit the back tabs of the back case into

the system controller and mount it using the flat­top screw.

CAUTION

1

2

3

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5

6

7

8

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

4. System Controller

How to connect electrical wiring

(1) Connect B1, B2 to indoor PCB T10 connector using
the accessory 6P connector. (with fuse) (*No polarity)
Total wire length is less than 985 ft. and size is
AWG#18.

(2) Connect B5, B6 to indoor unit 2P terminal base.
(*No polarity). Wire size is AWG#18.

Basic wiring

Terminals for remote monitoring

Basic wiring diagram of control wiring

A max. of 64 indoor units and 30 outdoor units can be
connected in 1 system.

Up to 10 system controllers can be connected in 1
system.

B1

Indoor unit PCB

T10
(YEL)

2P terminal base

Indoor unit

System controller

Accessory connctor

Wire joint connection

B2

B3

B4

B5

B6

U1

U2

A1

<Back side of system controller>

A2

A3

A4

A5

A6

B6

B5

B4

B3

B2

B1

Inter-unit
control wiring

System controller

RC1

1-1

RC2 RC3

2-1 3-1

B1:

B2:

B3:

B4:

B5:

B6:

Power supply: DC12V *No polarity
To T10 connector on indoor PCB

Inter-unit control wiring. (Low voltage)
To indoor unit 2P terminal base (U1, U2)
*No polarity

Auxiliary of inter-unit control wiring

Not be used

A1:

A2:

A3: Common input for turning air conditioners on or off.

A4:

A5:

A6:

ON operation state indicator output.

Alarm indicator output.

Common indicator output.

Input for turning off air conditioners concurrently.

Input for turning on air conditioners concurrently.

Fig. 3-27

Fig. 3-28

Electrical wiring

Control of W-2WAY ECO-i SYSTEM

3-46

1

2

3

4

5

6

7

8

3-47

1

2

3

4

5

6

7

8

Control of W-2WAY ECO-i SYSTEM

4. System Controller

■ Address switch setting

2046_M_I

1

ON

Main/sub selection switch

OFF: System controller operates as main controller.
ON: System controller operates as sub-controller.

SW1

ALL/ZONE mode selection switch

ALL mode:
All indoor units can be controlled by system controller
ZONE 1, 2, 3, 4 mode:
Indoor units in one of zone 1, 2, 3, or 4 can be controlled
by system controller. All indoor units cannot be set.

ALL mode
ZONE 1 mode
ZONE 2 mode
ZONE 3 mode
ZONE 4 mode

OFF
OFF

ON

OFF

ON

2

OFF
OFF
OFF

ON
ON

3

OFF

4

OFF

ON
ON
ON
ON

5

Central control/Remote control mode selection switch.

OFF: Central control mode.
Individual setting by remote controller can be inhibited by
system controller.

ON: Remote control mode.
Setting by system controller is inhibited by other central
control equipments.

Central control Main/Sub selection switch

(OFF: Main, ON: Sub)

1 When AMY adaptor etc. is used with system controller,

set the switch to ON position.

2 When only one system controller is used, set the switch to

OFF position.

3 Except 1 , when multiple system controllers are used,

set only one system controller to OFF position others to
ON position.
ALL mode system controller to be OFF position.
(recommended)

(Central control) button operation switch

OFF: (Central control) button operation is permitted.
ON : button operation is inhibitted.

*All switches are OFF position at shipment.

OFF

2 3 4

SW1

5 6 7 8

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

2047_M_I

1

ON

Weekly timer input switches.

System controller operation can be set when weekly timer
activates (ON/OFF).

SW2

Incase of Remote control mode, use 1 or 2 .
In case of ZONE 1, 2, 3, 4 mode, ALL, all indoor units means
one of ZONE 1, 2, 3, 4.
*

1

: 1 (Central control 1) means ON/OFF operation cannot

excecute by remote controller.

*2: 2 (Central control 2) means ON/OFF, MODE change.

Temp. setting cannot be excecuted by remote controller.

All OFF
All indoor units to
be 1*

1

All OFF and all
indoor units to be
1*

1

All indoor units to
be 2*

2

All OFF and all
indoor units to be
2*

2

All OFF

No change
Individual control
of all indoor units
to be permitted

Ditto

Ditto

Ditto

All ON

Timer OFF→ON Timer ON→OFF

System controller operation

Switch No.

2

3

4

5

6

1

ON

OFF

ON

OFF

ON

OFF

OFF

OFF

OFF

ON

ON

OFF

OFF

ON

ON

OFF

OFF

OFF

1 32

Auxilaly switch

Must be set to OFF position.

Beep tone switch

OFF: Beep tone when each button is pushed.
ON: No tone when each button is pushed.

Indication switch

Normally set to OFF position.
When set to ON position, indication is not displayed on LCD
of system controller.

*All switches are OFF position at shipment.

OFF

2 3 4

SW2

5 6 7 8

4. System Controller

Control of W-2WAY ECO-i SYSTEM

3-48

1

2

3

4

5

6

7

8

3-49

1

2

3

4

5

6

7

8

Control of W-2WAY ECO-i SYSTEM

4. System Controller

Control of ECO MULTI SYSTEM

■ Mode setting

According to function of each system controller, set
SW1 as Fig. 3-29.

(1) Central control/Remote control mode

● Central control mode
System controller is used as central control equip­ment.
Individual setting by remote controller can be
inhibitted by system controller

● Remote control mode
System controller is used as remote controller.
Setting by system controller is inhibitted by other
central control equipments.

(2) ALL/ZONE mode

● ALL mode

All indoor units can be controlled by system control­ler.

● ZONE mode

Indoor units in one of ZONE 1, 2, 3 or 4 can be
controlled by system controller

(3) Function of system controller is 10 types accord-

ing to combination of central control/remote
control mode and ALL/ZONE mode setting as the
table 9-1.

(4) Stick the system controller unit label in a con-

spicuous position.

Table 9-1

Central control Remote control

ALL 1. ALL/Central 6. ALL/Remote

ZONE1 2. ZONE1/Central 7. ZONE1/Remote

ZONE2 3. ZONE2/Central 8. ZONE2/Remote

ZONE3 4. ZONE3/Central 9. ZONE3/Remote

ZONE4 5. ZONE4/Central 10. ZONE4/Remote

2048_M_I

2

ON
OFF

3 4 5 6

ALL

central control

2

ON
OFF

3 4 5 6

ALL

remote control

Inter-unit control wiring

2

ON
OFF

3 4 5 6

ZONE1

central control

2

ON
OFF

3 4 5 6

1

ZONE1

remote control

2 16

ZONE1

central control

address 1-16

2

ON
OFF

3 4 5 6

ZONE2

central control

2

ON
OFF

3 4 5 6

17

ZONE2

remote control

18 32

ZONE2
central control
address 17-32

2

ON
OFF

3 4 5 6

ZONE3

central control

2

ON
OFF

3 4 5 6

33

ZONE3

remote control

34 48

ZONE3
central control
address 33-48

2

ON
OFF

3 4 5 6

ZONE4

central control

2

ON
OFF

3 4 5 6

49

ZONE4

remote control

50 64

ZONE4
central control
address 49-64

Central control

mode

Remote control

mode

Fig. 3-29

Control of W-2WAY ECO-i SYSTEM

1

2

3

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8

Control of ECO MULTI SYSTEM

■ How to perform zone registration

To operate the system controller properly, zone registration is required after finishing the test run (and after
setting all indoor unit addresses) using one of the following methods.

(a) Zone registration using the remote controller (RCS-TM80BG)

Refer to page 3-52

(b) Zone registration using the system controller (SHA-KC64UG)

Refer to page 3-53

(c) Automatic zone registration using the system controller (SHA-KC64UG)

Refer to page 3-54

For methods (a) and (b), you should make a zone registration table manually before performing the registra­tion as shown on the next page.

For method (c), zone registration is executed automatically, proceeding from small indoor unit address and
small central addresses to larger numbers in numerical order. For example:

NOTE 1. An indoor unit address is assigned to each indoor unit during automatic address opera-

tion. Each indoor unit address combines an R.C. address and indoor unit number as
follows:

This address is displayed on remote controller for UNIT No. when the UNIT button is
pressed.

2. The central address represents the zone and group number. These addressed are
assigned in ascending numerical order.

Central address 1 2 3 4 5 6

ZONE–group 1-1 1-2 1-3 1-4 1-5 1-6

Indoor unit address 1-1 1-2 2-1 2-2 2-3 3-1

2084_M_I

: Indoor unit address (UNIT No.)1 – 1

Indoor unit No.
Refrigerant circuit No. (R.C. address)

4. System Controller

3-50

1

2

3

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5

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8

3-51

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2

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8

Control of W-2WAY ECO-i SYSTEM

4. System Controller

3

Control of ECO MULTI SYSTEM

ZONE GROUP

Central

address

Indoor unit

address

(UNIT No.)

Indoor unit

address

(UNIT No.)

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

1

2

3

4

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

31

32

Unit location ZONE GROUP

Central

address

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

Unit location

■ ZONE registration table

NOTE 1. Assign indoor unit addresses to the desired positions (central addresses)

manually.

2. For group control, only the main indoor unit should be assigned.
Sub indoor units cannot be assigned.

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

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2

3

4

5

6

7

8

4. System Controller

Control of ECO MULTI SYSTEM

NOTE

NOTE

In case of group control “ALL” instead of “UNIT No.”
will flash on the display. Select the main indoor unit
address by pressing the button once.

(4) Set CODE No. to 03 using the and

( ) buttons.

The CODE No. 03 must be selected to perform zone
registration using the remote controller.

(5) Set the Central address which you want to assign

to the indoor unit address using the and

( ) buttons according to the zone

registration table.

(6) Press the button. The CODE No. and Central

address changes from flashing to ON state. If you
make mistake, then press the button and

reset the central address.

(7) Press the button to finish zone registration.

NOTE

Fig. 3-30

2049_M_I

2050_M_I

For example, in this case

Indoor unit address: 1–8
Central address : 17 (ZONE 2, GROUP 1)

Fig. 3-31

(a) Zone registration using the remote controller

(RCS-TM80BG)

(Determination of central address)

● In this case, after confirming which indoor unit is
connected to the remote controller and that the air
conditioner in the OFF state, you set the central
addresses one at a time.

● If the system has no remote controller, connect a
remote controller to the system temporarily. Then
follow this procedure.

The indoor unit address must already have been set
before performing zone registration. If necessary, refer
to the Installation Manual supplied with the outdoor
unit.

(1) Press the and buttons at the same time

of the remote controller for more than 4 seconds.

(2) Do not press buttton.

(3) Once in this mode, the UNIT No., CODE No., No.

of SET DATA and indications will flash on
the display as shown Fig. 3-30.

Control of W-2WAY ECO-i SYSTEM

3-52