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20K

5/8"

1/4"

25

15

28K/30K/40K

5/8"

3/8"

30

20

44K/48K/50K

3/4"

3/8"

40

25

80K

1"

5/8"

50

30

PIPE SIZE

MODEL

GAS SIDE

LIQUID SIDE

Max.

Length

A (m)

Max.

Elevation

B (m)

A

B

Indoor unit

Outdoor unit

200mm

70mm

70mm

90mm

Wall

Core Drill

Tilt 

Cut if necessary

More than 15mm

Wall

Plastic tube
(Bushing)

INSIDE

OUTSIDE

1. The mounting floor should be strong and solid

enough to prevent it from vibration.

2. Drill the piping hole with 70mm diameter hole-

core drill at either the right or the left of indoor
unit. The hole should be sightly slant to the
outdoor side.

3. Insert the plastic tube through the hole.

4. Cut the extruded outside part of the plastic

tube, if necessary.

1. Install the outdoor unit on the concrete or any solid base securely and horizontally by securing it

with bolts (Ø12mm) and nuts.

2. If there is any vibration transmitted to the building, mount the rubber underneath the outdoor unit.

Before shipment, this air conditioner is filled
with the rated amount of refrigerant including
additional amount required for air-purging,
subject to 5m piping length. (The rated amount
of refrigerant is indicated on the name plate.)
But when the piping length exceeds 5 meters,
additional charge is required according to the
following table.

Example)  28K/30K
In case of 10m long pipe(one-way), the amount
of refrigerant to be replenished is:

(10 - 5) x 30 = 150g

(Unit: g)

REFRIGERANT CHARGE

30 per 1m

40 per 1m

80 per 1m

MODEL

20K/28K/30K/40K

(Btu/h) 

44K/48K/50K

(Btu/h)

80K

(Btu/h)

1

Preparation of tools and installation parts

Preparation of installation

2

Flaring the pipes

To insert the flare nuts, mounted on the 
connection parts of both indoor and 
outdoor unit, onto the copper pipes.

3

Pipe bending

To reduce the flow resistance of refrigerant.

4

Connection of installation parts

Connection of long piping

(elbows, socket etc)

5

Tighten the flare nut (outdoor) 

Connecting the pipings of the outdoor unit.

6

Blowing the pipings

To remove dust and scale in working.

7

Tighten the flare nut (indoor)

Connecting the pipings of the indoor unit.

8

Check a gas-leakage of the connecting 
part of the pipings.

9

Vacuum drying of the piping and indoor unit

The air which contains moisture and which
remains in the refrigeration cycle may cause a 
malfunction on the compressor

10

Open the 3-way (liquid side) and 
3-way (gas side) valves.

11

Form the pipings

To prevent heat loss and sweat

12

Checking the drainage (indoor unit) 

To ensure if water flow drain hose of indoor unit.

13

Connecting the cable between outdoor 

Preparation of the operating

and indoor unit 

14

Connecting the main cable to outdoor unit

15

Supply the power to the crankcase heater

To prevent the liquid back to the compressor.

(Before the operating the unit)

(Heat pump only)

16

Cooling operation
(Use the remote control or display of the
indoor unit)

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