Haier AU282FHERA(H) Installation Manual page 10

Installation instruction
Pipe material and specs selection
1. Please select the refrigerant pipe of the below material.
Material: the phosphoric oxidize seamless copper pipe, model: C1220T-1/2H (diameter is over 19.05); C1220T-
0(diameter is below 15.88).
2. Thickness and specs:
Confirm the pipe thickness and specs according to the pipe selection method(the unit is with R410A, if the pipe over
19.05 is 0-type, the pressure preservation will be bad, thus it must be 1/2H type and over the min. thickness.
3. The branch pipe must be from Haier.
4. When installing the stop valve, refer to the relative operation instruction.
5. The pipe installation should be in the allowable range.
6. The installation of branch pipe and gather pipe should be performed according to the relative manual.
Drain pipe disposal
• Make sure the drain works properly.
• In regions where buildups of snow can be expected, the accumulation and freezing of snow in the space between the
heat exchanger and external plate may lower operating efficiency.
• After punching the knock-out hole, the application of repair-type paint on the surface around the edge sections is
recommended to prevent rust.
Pipe specification:
b c
a a
b
a a
1. Pipe "a" diameter (between indoor and branch pipe) (depends on indoor pipe)
Please refer to the indoor air conditioner manual.
2. Pipe "b" diameter (between branch pipes)
Total indoor capacity after the branch pipe (x100W)
112≤X< 234
3. Pipe "c" diameter ( outdoor pipe diameter)
Outdoor capacity(100W)
80
150
180
Note:
When the distance from outdoor to the longest indoor is over 30m, the main pipe should be the enlarged diameter.
Copper pipe selection:
hardness
Outer diameter (mm)
Min. thickness (mm)
Note: If the copper pipe with outer diameter 19.05 is coil pipe, the thickness should be over 1.1.
X<112
Gas pipe (mm)
Ø15.88
Ø19.05
Ø19.05
softness
Ø6.35 Ø9.52 Ø12.7
0.8 0.8
Gas pipe (mm) Liquid pipe (mm)
Ø15.88
Ø19.05
Liquid pipe (mm)
Ø9.52
Ø9.52
Ø9.52
Half-hardness
Ø15.88 Ø19.05 Ø22.22 Ø25.24 Ø28.58
1.0 1.0 1.0
8
Ø9.52
Ø9.52
1.1 1.2 1.4