Panasonic LZ2 - Precautions for Installation Using New Refrigerant

xviii
4-Way Cassette 60 × 60
Use or nonuse of R32
refrigerant leakage
detection sensor
Nonuse Use
Capacity of indoor unit
15~56 15 22 28 36 45~56
Refrigerant charge amount (kg)
Floor area of the room (m
2
)
82
11.3 11.3 11.3 11.3 11.3 11.3
84
11.5 11.5 11.5 11.5 11.5 11.5
86
11.6 11.6 11.6 11.6 11.6 11.6
88
11.7 11.7 11.7 11.7 11.7 11.7
90
11.9 11.9 11.9 11.9 11.9 11.9
92 12.0 12.0 12.0 12.0 12.0 12.0
94 12.1 12.1 12.1 12.1 12.1 12.1
96 12.3 12.3 12.3 12.3 12.3 12.3
98 12.4 12.4 12.4 12.4 12.4 12.4
100 12.5 12.5 12.5 12.5 12.5 12.5
00_330340_2WAY_Eng.indb 17 2020/12/18 9:33:08
Precautions for Installation Using New Refrigerant
1. Care regarding tubing
1-1. Process tubing
● Material: Use seamless phosphorous deoxidized copper tube for refrigeration. Wall
thickness shall comply with the applicable legislation. The minimal wall thickness must be in
accordance with the table below.
● 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: mm
Material Temper - O (Soft copper tube)
Copper tube
Outer diameter 6.35 9.52 12.7 15.88 19.05
Wall thickness 0.8 0.8 0.8 1.0 1.2
Unit: mm
Material Temper - 1/2 H, H (Hard copper tube)
Copper tube
Outer diameter 22.22 25.4
Wall thickness 1.0 1.0
1-2. Prevent impurities including water, dust and oxide from entering the tubing. Impurities
can cause R32 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 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.
00_330340_2WAY_Eng.indb 18 2020/12/18 9:33:08
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