Panasonic U-72MF2U9 Installation Instructions Manual page 27

Refrigerant tube port
● Use caulking, putty, or a similar material to fill any gaps at the refrigerant tube port
( ) in order to prevent rainwater, dust or foreign substances from entering the unit.
* Perform this work even if the tubing is routed out in a downward direction.
● Tighten each cap as specified below.
Tightening torque for each cap
Cap tightening torque
lbs · inch
Service
N · m
port cap
{kgf · cm}
lbs · inch
The liquid
Valve cap N · m
tube valve
{kgf · cm}
lbs · inch
Flare nut N · m
{kgf · cm}
lbs · inch
Service
N · m
port cap
{kgf · cm}
lbs · inch
The
discharge Valve cap N · m
tube valve
{kgf · cm}
lbs · inch
Flare nut N · m
{kgf · cm}
lbs · inch
Service
N · m
port cap
The suction {kgf · cm}
tube valve lbs · inch
Valve cap N · m
{kgf · cm}
lbs · inch
Service
N · m
port cap
{kgf · cm}
lbs · inch
The balance
Valve cap N · m
tube valve
{kgf · cm}
lbs · inch
Flare nut N · m
{kgf · cm}
For type 72
Valve cap
width 35/64 (14)
Service port cap
width 43/64 (17)
Balance
tube
Service port cap
width 43/64 (17)
Valve cap
width 3/4 (19)
Liquid
Flare nut
tube
ø3/8 (ø9.52)
Flare nut
ø5/8 (ø15.88)
Do not apply an adjustable wrench
to the hexagonal part.
Do not 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 the valve. (If force is applied to this part, gas
leakage will occur.)
Type 72 Type 96 Type 120 Type 144
(6 Ton) (8 Ton) (10 Ton) (12 Ton)
90-100
10-12
{100-120}
120-170 190-240
14-20 22-28
{140-200} {220-280}
300-360 430-610
34-42 49-61
{340-420} {490-610}
90-100 90-100
10-20 10-20
{100-200} {100-200}
420-530 170-220
48-60 20-25
{480-600} {200-250}
590-710 -
67-81 -
{680-820} -
90-100
10-12
{100-120 }
170-220
20-25
{200-250}
90-100
10-12
{100-120 }
170-220
20-25
{200-250}
120-160
14-18
{140-180}
Unit: in. (mm)
Service port cap
Flare nut
width 43/64 (17)
ø1/4 (ø6.35)
Valve cap
width 35/64 (14)
Service port cap
width 43/64 (17)
Valve cap
width 1-3/16 (30)
Discharge Discharge
tube
tube
Suction tube
For type 96
Valve cap
width 35/64 (14)
Service port cap
width 43/64 (17)
Service port cap
width 43/64 (17)
Valve cap
width 3/4 (19)
Flare nut
ø3/8 (ø9.52)
Flare nut
ø5/8 (ø15.88)
For type 120/144
Valve cap
width 35/64 (14)
Service port cap
width 43/64 (17)
Service port cap
width 43/64 (17)
Valve cap
width 17/16 (27)
Flare nut
ø1/2 (ø12.7)
Use two adjustable wrenches, as shown in the
figure, when removing the liquid tube valve flare
nut and the discharge tube valve flare nut.
1. Do not apply a wrench to the valve cap when
removing or installing the flare nuts.
Doing so may damage the valve.
2. 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.
3. 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.)
27
Tubing cover
Tubing routed out
through the front side
Bottom plate
Tubing routed out
through the bottom
Service port cap
Flare nut
width 43/64 (17)
ø1/4 (ø6.35)
Balance
Valve cap
tube
width 43/64 (17)
Service port cap
width 43/64 (17)
Valve cap
width 1-3/16 (30)
Discharge Discharge
tube
Liquid tube
Suction tube
tube
Valve cap
Flare nut
width 35/64 (14)
ø1/4 (ø6.35)
Valve cap
Balance
width 43/64 (17)
tube
Service port cap
width 43/64 (17)
Service port cap
width 43/64 (17)
Discharge
Discharge
tube
tube
Liquid
Suction tube
tube
Unit: in. (mm)
Unit: in. (mm)