Haier MRV SII AU042FNEUA Service Manual page 32

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:
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)
X<112
112≤X< 234
3. Pipe "c" diameter ( outdoor pipe diameter)
Outdoor capacity
Gas pipe (mm)
(100W)
AU042FNERA
AU052FNERA
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) Ø6.35
Min. thickness (mm)
Note:
If the copper pipe with outer diameter 19.05 is coil pipe, the thickness should be over 1.1.
a
a
Liquid pipe (mm)
Ø15.88 Ø9.52
Ø15.88 Ø9.52
softness
Ø9.52 Ø12.7
0.8 0.8 1.0
b c
a
b
a
Gas pipe (mm) Liquid pipe (mm)
Ø15.88 Ø9.52
Ø19.05 Ø9.52
Ø15.88 Ø19.05
1.0 1.0
30
Half-hardness
Ø22.22 Ø25.24 Ø28.58
1.1 1.2 1.4