Panasonic U-72MF1U9, Technical Data Manual

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Manifold gauge Yes No Types of refrigerant, refrigerating machine
oil, and pressure gauge are different.
Charge hose Yes
Yes
No
Yes No
Yes No
Yes
To resist higher pressure, material must be changed.
Vacuum pump 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 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 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.
1-2.
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.
in the unit.
2-2. nce 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.
Prevent impurities including water, dust and oxide from entering the tubing. Impurities can cause R410A
Since R410A is a non-azeotrope, recharging the refrigerant in gas form can lower performance and cause defects
Since refrigerant composition changes and performa
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 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)
O Material
Material
Copper tube
Unit: in. (mm)
1/2 H, H
Copper tube
Outer diameter
Wall thickness
Item
New
tool?
R407C tools
compatible
with R410A?
Remarks
* Using tools for R22 and R407C and new tools for R410A together can cause defects.
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)
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)
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)
TD831158-00̲3WAY̲VRF̲SYS.indb 4 TD831158-00̲3WAY̲VRF̲SYS.indb 4 2012/01/23 17:31:03 2012/01/23 17:31:03