I 2-2 Connecting pipes I
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
A dimensions (mm)
o;
�
Copper
Flare dimensions
"'
pipeO.D.
Flare tool for R41 0A
q\B dimensions
0
(mm)
+I
Clutch-style
(mm)
Copper
q\6.35(1/4")
0-0.5
8.7-9.1
pipe
Apply refrigerant machine oil over the entire flare seat surface.
*Do not apply it to the screws as it may cause loosening of the flare nut.
r-A-n-(\ �-
R
Make sure to use the flare nut attached to the unit
�- �� � (Using commercial item may cause breaks).
Tightening torque
N·m(kgf-cm)
14-18(140-180)
3. Wrap the enclosed pipe cover ® around the liquid pipe connection, pushing it on the outside of External LEV Box CD.
4. Secure both ends of pipe cover ® with the enclosed bands @ to make sure it is insulated.
Pipe cover®
External LEV Box 0)
Band®
Cross-section view of connection
-$
-$
@
-$-
@
-$-
I
-�=-===::=
I
J
Wiring procedure
I-----<
,-
_____ J
Insulation material
for refrigerant pipe
(Procure locally)
Pipe cover®
Insulation material
for refrigerant pipe
Band®
Push in
Refrigerant pipe
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 band@ to bind the on-site wirings.
Example: PKFY-P·VLM-E
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.)
Indoor unit side
t
Clamp
On-site wirings
Disconnect cable for LEV in the indoor unit.
Connect to the
CN60 connector
�,-;;-r----L Controller
-fl;---,-1°"""'
board
Cable for External LEV Box
Lt.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 the cable for External LEV box CD to the connector CN60.
Keep the disconnected cable in the electrical box.
4
Linear expansion valve
External LEV Box 0)
Indoor unit
Cable (Accessory:5300mm)
CN60 connector (LEV, white)
Controller board
Test run
Carry out test run referring to the installation manual enclosed with indoor/outdoor unit.
MITSUBISHI ELECTRIC CORPORATION
HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
4
