Panasonic U-20GES3E5 Manual Del Usuario página 20

2. Connect the tubing as shown in Table 4.
Table 4
Refrigerant tubing
Gas tube (Ø22.22)
1
Liquid tube (Ø9.52)
2
Balance tube (Ø6.35)
3
3. Use caulking, putty, or a similar material to fill any gaps at the refrigerant tube port (
prevent rainwater, dust or foreign substances from entering the unit as shown in Fig. 19. Perform this
work even if the tubing is routed out in a downward direction.
Tubing routed out
through the front side
CAUTION
 Use two adjustable wrenches when removing or installing the balance tube flare nut. In particular, do not
apply an adjustable wrench to the hexagonal part at the top of valve. If force is applied to this part, gas
leakage will occur.
 Apply an adjustable wrench to settle the fixing tool as shown in the figure. If not used, the valve fixing tool
will get distorted.
 Use two adjustable wrenches, as shown in the figure, when removing the liquid tube valve flare nut.
• Do not apply a wrench to the valve cap when removing or installing the flare nuts. Doing so may damage
the valve.
• If the valve cap is left off for a long period of time, refrigerant leakage will occur. Therefore, do not leave
the valve cap off.
• Applying refrigerant oil to the flare surface can be effective in preventing gas leakage, however be sure to
use a refrigerant oil which is suitable for the refrigerant that is used in the system. This unit utilizes R410A
refrigerant, and the refrigerant oil is ether oil (synthetic oil). However, hub oil (synthetic oil) can also be
used.
Do not apply an adjustable
wrench to the hexagonal part.
Connection method
Brazing
Flare connection
Flare connection
Tubing cover
Fig. 19
Valve fixing tool
EN - 20
Tightening torque for
flare nut [N · m ]
-
3
38±4
16±2
Tubing routed out
through the bottom
2
1
) in order to
Bottom plate