DOWNLOAD Panasonic CS-E21JB4EA / CU-E21HBEA Service Manual ↓ Size: 4.37 MB | Pages: 87 in PDF or view online for FREE

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• Remove the mounting screw, remove the control box cover,

and then connect the wires by following the procedure given
in the illustration.

Earth lead wire shall be longer than other wires as shown in
the figure for the electrical safety in case of the slipping out of
the cord from anchorage.

1. Remove the air inlet grille by moving the catchers to center.

2. Fitting the decorative panel

• Temporarily secure the fixing screws (3 pcs.) before

fitting the decorative panel. (For temporarily securing the
front grille.)

• Place decorative panel on the screws (3 pcs.) before

fitting, move decorative panel as illustrated and tighten
all the screws (4 pcs.).

The decorative panel has its installation direction. Confirm the direction by displaying the piping side.

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• 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.

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• 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.

A

B

C

D

612.5 mm

131 mm

19 mm

383 mm

Piping size (Torque)

Gas

Liquid

1/2” (55 N.m)

1/4” (18 N.m)

Do not over tighten, over tightening cause gas leakage.

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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.