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2-2 Connecting pipes
1. After deciding the installation location, carry out flaring work of liquid pipe and apply thin layer of refrigerant oil (procure locally) to
the flared seat surface.
2. Connect the field refrigerant piping.
A dimensions (mm)
A
Copper
pipe O.D.
Flare tool for R410A
Flare tool for R22, R407C
(mm)
Clutch-style
Die
[6.35(1/4")
0~0.5
Copper
pipe
[9.52(3/8")
0~0.5
w When flare tools for R22, R407C are used for R410A flaring work, refer to the table above. The size adjustment gauge can be used to secure A measurements.
Apply thin layer of ester oil, ether oil or alkylbenzene oil to the entire flare seat surface.
wDo not apply it to the screws as it may cause loosening of the flare nut.
Make sure to use the flare nut attached to the unit
(Using commercial item may cause breaks).
3. Wrap the enclosed pipe cover 3 around the liquid pipe connection, pushing it on the outside of External LEV Box 1.
4. Secure both ends of pipe cover 3 with the enclosed bands 4 to make sure it is insulated.
Pipe cover 3
Band 4
External LEV Box 1
30~40mm
Joint pipe 2
R410A : Only for indoor unit 63 models
R407C : Only for indoor unit 50, 63 models
3
Wiring procedure
Wiring procedure differs depending on the indoor unit. To remove the electrical box cover when connecting the cables of each
indoor unit, refer to the installation manuals of each indoor unit. Fix the cable together with the on-site wirings (power supply cable,
transmission cable and remote controller cable). Use the fastener
Example: PKFY-P . VBM-E
Electrical box
Fastener 5
Use the clamp for on-site wiring under the electrical
parts box to fix the cable together with the on-site
wirings (power supply cable, transmission cable and
remote controller cable).
45- i2-
Flare dimensions
Tightening torque
N . m(kgf . cm)
B dimensions
[
(mm)
1.0~1.5
8.7~9.1
14~18(140~180)
34~42(340~420)
1.0~1.5
12.8~13.2
Cross-section view of connection
30mm
Band 4
Pipe cover 3
Insulation material
for refrigerant pipe
Refrigerant pipe
Insulation material
for refrigerant pipe
(Procure locally)
to bind the cables in the electrical box.
5
Controller board
Connect to the CN60 connector.
Cable for External LEV Box
Caution
Make sure to complete the work below before turning on the indoor unit.
If you turn on the indoor unit before disconnecting the cable for LEV in the indoor unit, the LEV in the indoor unit will close.
(At factory shipment, the LEV is fully open.)
If the LEV in the indoor unit closes, you must use the maintenance tool to open the LEV fully.
Consult your dealer for service.
At factory shipment, the cable for LEV in the indoor unit is connected to the connector CN60 on the indoor controller board.
Remove the cable for LEV in the indoor unit and connect cable No.1(100mm) for External LEV box 1 to the connector
CN60.
And certain models have connector CN60 which doesn't fit cable No.1 as shown below, then replace cable No.1 (100mm)
with the provided cable No.2(100mm) 6.
Bind the removed cable for LEV with fastener 5 and place it in the electrical box.
The replacement of the
cable No.1 is not necessary.
Linear expansion valve
LEV
Push in
Wiring shown below can be applied when the connector board and LEV are connected with relay.
Remove the relay connector in electrical box. Connect the lead wire of the connector (CN60) to the connector of the cable
(Accessory:5300mm) of External LEV Box 1. Bind the removed lead wire of LEV with fastener 5 and place it in the electrical
box. Remove the cable No.1 (100mm) since it is unnecessary.
Linear expansion valve
LEV
Relay connector
4
Test run
Carry out test run referring to the installation manual enclosed with indoor/outdoor unit.
The replacement of the cable No.1
with the cable No.2(100mm) 6
is required.
Indoor unit
Cable (Accessory:100mm)
Electrical box
Cable (Accessory:5300mm)
Put the connector
in the electrical box.
CN60 connector (LEV, white)
Controller board
Controller board
Indoor unit
Electrical box
CN60 connector (LEV, white)
Remove
Cable (Accessory:5300mm)
Put the connector
Lead wire of
in the electrical box.
Connector (CN60)
HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
External LEV Box 1
External LEV Box 1
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