Care regarding tubing | Sanyo 85464359981002 guide

Precautions for Installation Using New Refrigerant

1. Care regarding tubing

1-1. Process tubing

●Material: Use C1220 phosphorous deoxidized copper specified in JIS H3300 “Copper and Copper Alloy Seamless Pipes and Tubes.”

●Tubing size: Be sure to use the sizes indicated in the table below.

●Use a tube cutter when cutting the tubing, and be sure to remove any flash. This also applies to distribution joints (optional).

●When bending tubing, use a bending radius that is 4 times the outer diameter of the tubing or larger.

CAUTION

Use sufficient care in handling the tubing. Seal the tubing ends with caps or tape to prevent dirt, moisture, or other foreign substances from entering. These substances can result in system malfunction.

Unit: in. (mm)

Material				O

Copper tube	Outer diameter	1/4 (6.35)	3/8 (9.52)	1/2 (12.7)	5/8 (15.88)	3/4 (19.05)

	Wall thickness	1/32 (0.8)	1/32 (0.8)	1/32 (0.8)	5/128 (1.0)	5/128 (1.0)
	Wall thickness	1/32 (0.8)	1/32 (0.8)	1/32 (0.8)	5/128 (1.0)	5/128 (1.0)

1-2. Prevent impurities including water, dust and oxide from entering the tubing. Impurities can cause R410A refrigerant deterioration and compressor defects. Due to the features of the refrigerant and refrigerating machine oil, the prevention of water and other impurities becomes more important than ever.

2. Be sure to recharge the refrigerant only in liquid form.

2-1. Since R410A is a non-azeotrope, recharging the refrigerant in gas form can lower performance and cause defects of the unit.

2-2. Since refrigerant composition changes and performance decreases when gas leaks, collect the remaining refrigerant and recharge the required total amount of new refrigerant after fixing the leak.

3. Different tools required

3-1. Tool specifications have been changed due to the characteristics of R410A. Some tools for R22- and R407C-type refrigerant systems cannot be used.

	New	R407C tools
Item	New	compatible	Remarks
Item	tool?	compatible	Remarks
	tool?	with R410A?

Manifold gauge	Yes	No	Types of refrigerant, refrigerating machine oil, and
			pressure gauge are different.

Charge hose	Yes	No	To resist higher pressure, material must be changed.

Vacuum pump	Yes	Yes	Use a conventional vacuum pump if it is equipped
			with a check valve. If it has no check valve,
			purchase and attach a vacuum pump adapter.

Leak detector	Yes	No	Leak detectors for CFC and HCFC that
			react to chlorine do not function because
			R410A contains no chlorine. Leak detector
			for HFC134a can be used for R410A.

Flaring oil	Yes	No	For systems that use R22, apply mineral oil (Suniso oil)
			to the flare nuts on the tubing to prevent refrigerant
			leakage. For machines that use R407C or R410A, apply
			synthetic oil (ether oil) to the flare nuts.

Manifold gauge

Vacuum pump

Outlet

Inlet

* Using tools for R22 and R407C and new tools for R410A together can cause defects.

85464359981002 specifications

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