Panasonic ECOi 3 Way Manual de instalación descargar pdf (Pagina 4)

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

in 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.

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.”

For tubes of ø7/8" (ø22.22 mm) or larger, use C1220 T-1/2H material or H material, and do not bend the 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.

Manifold gauge

Vacuum pump

Outlet

Inlet

CAUTION

Use sufﬁ cient 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)

over 5/128 (1.0)

Unit: in. (mm)

Material 1/2 H, H

Copper tube

Outer diameter

7/8 (22.22) 1 (25.4) 1-1/8 (28.58) 1-1/4 (31.75) 1-1/2 (38.1) 1-5/8 (41.28)

Wall thickness

5/128 (1.0) 5/128 (1.0) 5/128 (1.0) 3/64 (1.1)

over 3/64 (1.15) over 3/64 (1.20)

Item

New

tool?

R407C tools

compatible

with R410A?

Remarks

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.

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

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Panasonic ECOi 3 Way Manual de instalación Pagina 4

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