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
Bottom plate
Tubing cover
Tubing routed out | Tubing routed out |
through the front side | through the bottom |
Cap tightening torque
Service port cap | 60 | – 100 lbs ·in. (70 – 120 kgf ·cm) |
(width 19/32", 43/64") | ||
Valve cap | 170 | – 220 lbs ·in. (200 – 250 kgf ·cm) |
(width 55/64", 15/16") |
*Be careful of the cap sizes. The sizes of the service port cap and valve cap on the 14053 type liquid tube valves are different from other valve caps.
(0905 Type)
Service port cap (width 19/32)
Valve cap (width 55/64)
Valve cap (width 55/64)
Service port cap (width 19/32)
Flare nut | Valve cap |
(ø1/4) | (width 55/64) |
Flare nut | Service port cap |
(ø3/8) | (width 19/32) |
Do not apply a monkey wrench to the hexagonal part.
Do not use two monkey wrenches when removing or installing the balance tube flare nut. In particular, do not apply a monkey wrench to the hexagonal part at the top of the valve.
(If force is applied to this part, gas leakage will occur.)
(1405 Type)
Service port cap (width 43/64)
Valve cap (width 15/16)
Valve cap (width 55/64)
Service port cap (width 19/32)
Flare nut | Valve cap |
(ø1/4) | (width 55/64) |
Flare nut | Service port cap |
(ø3/8) | (width 19/32) |
Unit: in.
Use two monkey wrenches, as shown in the figure, when removing the liquid 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.)
●Precautions for brazing
Be sure to replace the air inside the tube with nitrogen to prevent oxide film from forming during the brazing process. Be sure to use a damp cloth or other means to cool the valve unit during brazing.
Work method |
| |
| Remote valve | |
|
Brazing locations | Taping |
Nitrogen
CAUTION
1.Be sure to use nitrogen. (Oxygen, CO2, and CFC must not be used.)
2.Use a
3.Do not use agents intended to prevent the formation of oxide film. They will adversely affect the refrig- eration oil, and may cause equipment failure.
4.The balance tube is not used if only 1 outdoor unit is installed.
Use the unit in the same conditions as when it was shipped from the factory.
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