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37

• Check before hand the height from the ceiling to the unit.
• The front grille fitting direction is determined by the unit

direction.

• Only use the screws with the length of 35mm which is

provided, to fix the decorative panel.

• Do not use other screw which is longer it may cause

damage to the drain-pan and other components.

3. Fit the decorative panel and ceiling wall together and confirm no gap in between. Readjust indoor unit height, if there is a gap

between ceiling wall and decorative panel.

4. Open the indoor control box cover. (2 pcs)
5. Insert firmly the connector of cosmetic louver to indoor

pcb CN-STM1, CN-STM2 and CN-DISP.
Be caution not to clamp the cord in between control board
and control board cover.

6. After complete, install back removed part follow opposite

procedure.

Be sure to hook the air inlet grill string, to prevent
grill from falling and causing injury from it.

38

• After selecting the best location, start installation according

to Indoor/Outdoor Unit Installation Diagram.

1. Fix the unit on concrete or rigid frame firmly and

horizontally by bolt nut. (ø10 mm).

2. When installing at roof, please consider strong wind and

earthquake. Please fasten the installation stand firmly
with bolt or nails.

Connect The Piping To Indoor Unit
Please make flare after inserting flare nut (locate at joint portion
of tube assembly) onto the copper pipe. (In case of using long
piping)
Connect the piping

• Align the center of piping and sufficiently tighten the flare nut

with fingers.

• Further tighten the flare nut with torque wrench in specified

torque as stated in the table.

Connecting The Piping To Outdoor Unit
Decide piping length and then cut by using pipe cutter. Remove burrs from cut edge. Make flare after inserting the flare nut (locate
at valve) onto the copper pipe.
Align center of piping to valves and then tighten with torque wrench to the specified torque as stated in the table.

1. Please cut using pipe cutter and then remove the burrs.
2. Remove the burrs by using reamer. If burrs is not removed, gas leakage may be caused.

Turn the piping end down to avoid the metal powder entering the pipe.

3. Please make flare after inserting the flare nut onto the copper pipes.

Model

A

B

C

D

E10HBEA

570 mm

105 mm

18.5 mm

320 mm

E15HBEA,
E18HBEA,

E21HBEA

612.5 mm

131 mm

19 mm

383 mm

Model

Piping size (Torque)

Gas

Liquid

E10HBEA

3/8” (42 N.m)

1/4” (18 N.m)

E15HBEA, E18HBEA,

E21HBEA

1/2” (55 N.m)

1/4” (18 N.m)

Do not over tighten, over tightening cause gas leakage.

39

WHEN INSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES in the
following procedure.

1. Connect a charging hose with a push pin to the Low side of a charging set and the service port of the 3-way valve.

• Be sure to connect the end of the charging hose with the push pin to the service port.

2. Connect the center hose of the charging set to a vacuum pump with check valve, or vacuum pump and vacuum pump

adaptor.

3. Turn on the power switch of the vacuum pump and make sure that the needle in the gauge moves from 0 cmHg (0 MPa) to

 -76 cmHg (-0.1 MPa). Then evacuate the air approximately ten minutes.

4. Close the Low side valve of the charging set and turn off the vacuum pump. Make sure that the needle in the gauge does not

move after approximately five minutes.
Note: BE SURE TO FOLLOW THIS PROCEDURE IN ORDER TO AVOID REFRIGERANT GAS LEAKAGE.

5. Disconnect the charging hose from the vacuum pump and from the service port of the 3-way valve.
6. Tighten the service port caps of both of the 3-way valve at a torque of 18 N.m with a torque wrench.
7. Remove the valve caps of both of the 2-way valve and 3-way valve. Position both of the valves to “OPEN” using a hexagonal

wrench (4 mm).

8. Mount valve caps onto the 2-way valve and the 3-way valve.

• Be sure to check for gas leakage.

• If gauge needle does not move from 0 cmHg (0 MPa) to -76 cmHg (-0.1 MPa), in step 

 above take the following measure:

• If the leak stops when the piping connections are tightened further, continue working from step  .
• If the leak does not stop when the connections are retightened, repair the location of leak.
• Do not release refrigerant during piping work for installation and reinstallation. Take care of the liquid refrigerant, it may cause

frostbite.

40

(FOR DETAIL REFER TO WIRING DIAGRAM AT UNIT)

1. Remove the control board cover from the unit by loosening the screw.

2. Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 4 × 1.5 mm

2

 flexible

cord, type designation 245 IEC 57 or heavier cord.

3. Secure the cable onto the control board with the holder

(clamper).

4. Cable connection to the power supply through knife

switch (Disconnecting means).

• Connect the approved polychloroprene sheathed power

supply cable (3 x 1.5 mm

2

), type designation 245 IEC 57

or heavier cord to the terminal board, and connect the
other end of the cable to knife switch (Disconnecting
means).

5. For wire stripping and connection requirement, refer to

instruction 6 of indoor unit.
Note: Knife switch (Disconnecting means) should have
minimum 3.5 mm contact gap.

• Secure the cable onto the control board with the holder

(clamper).

• Power supply earth cable must connect to the left earth

terminal.

1. Please carry out insulation at pipe connection portion as mentioned in Indoor/Outdoor Unit Installation Diagram. Please wrap

the insulated piping end to prevent water from going inside the piping.

2. If drain hose or connecting piping is in the room (where dew may form), please increase the insulation by using POLY-E

FOAM with thickness 6 mm or above.

• If a drain elbow is used, the unit should be placed on a stand

which is taller than 3 cm.

• If the unit is used in an area where temperature falls below

0

°C for 2 or 3 days in succession, it is recommended not to

use a drain elbow, for the drain water freezes and the fan will
not rotate.

The following operations can be performed by pressing the
“AUTO” switch.

1. AUTO OPERATION MODE

The Auto operation will be activated immediately once the
Auto Switch is pressed.

2. TEST RUN OPERATION (FOR PUMP DOWN/

SERVICING PURPOSE)
The Test Run operation will be activated if the Auto
Switch is pressed continuously for more than 5 sec. to
below 8 sec. A “pep” sound will occur at the fifth sec., in
order to identify the starting of Test Run operation.