Sanyo CHDZR09053, XMHX1252, XMHX1852, CHDZR14053 Tightening torque for each cap, Work method

●Tighten each cap as specified below.

Tightening torque for each cap

Service port cap	60 – 100 lbs · in (70 – 120 kgf · cm)
(width 19/32")
Valve cap	170 – 220 lbs · in (200 – 250 kgf · cm)
(width 55/64")
Flare nut	300 – 360 lbs · in (340 – 420 kgf · cm)
(valve dia. ø3/8")

Valve cap

Flare nut

Service port cap

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.)

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		Pressure-reducing valve (regulator)
	Field-supply tube	Remote valve

Brazing locations Taping

Nitrogen

CAUTION

1.Be sure to use nitrogen. (Oxygen, CO2, and CFC must not be used.)

2.Use a pressure-reducing valve on the nitrogen tank.

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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