Haier MRV5 Installation Manual page 22

Installation procedure
L1: Total length of 22.22 liquid pipe; L2: Total length of 19.05 liquid pipe;
L3: Total length of 15.88 liquid pipe; L4: Total length of 12.7 liquid pipe;
L5: Total length of 9.52 liquid pipe; L6: Total length of 6.35 liquid pipe;
Total refrigerant volume charging on site during installation=W2+W3
W: Total refrigerant volume charging on site for maintenance.
Refrigerant
charging
Model
volume to
outdoor unit
at factory
AU08NFKERA
Refer to
AU10NFKERA
AU12NFKERA
Note:
• To prevent the different oil into the pipe, please use the special tool for R410A, especially for
gauge manifold and charging hose.
• Mark the refrigerant type in different colour on the tank. R410A is pink.
• Must not use the charging cylinder, because the R410A will change when transferring to the
cylinder.
• When charging refrigerant, the refrigerant should be taken out from the tank as liquid state.
• Mark the counted refrigerant volume due to the distributing pipe length on the label.
GWP: 2088
The product contains fluorinated greenhouse gases and its functioning relies upon such gases.
Heat insulation
• Gas pipe and liquid pipe should be heat insulated separately.
• The material for gas pipe should endure the high temperature over 120 .
• That for liquid pipe should be over 70 .
• The material thickness should be over 10mm, when ambient temp.
is 30 , and the relative humidity is over 80%, the material thickness
should be over 20mm.
• The material should cling the pipe closely without gap, then
be wrapped with adhesive tape. The connection wire can not
be put together with the heat insulation material and should
be far at least 20cm.
Fix the refrigerant pipe
• In operation, the pipe will vibrate and expand or shrink.
If not being fixed, the refrigerant will focus on one part to cause the broken pipe.
• To prevent the central stress, fix the pipe for every 2-3m.
Refrigerant record form
W1: W2:
Refrigerant
charging
volume to
outdoor unit
on site
0kg
0kg
label
0kg
W3: Refrigerant charging volume to
liquid pipe base on different piping
length calculation
Liquid pipe Additional refrigerant
diameter amount
(mm)
Ø6.35 0.022kg/m×__m=__kg
Ø9.52 0.054kg/m×__m=__kg
Ø12.7 0.11kg/m×__m=__kg
Ø15.88 0.17kg/m×__m=__kg
Ø19.05 0.25kg/m×__m=__kg
Ø22.22 0.35kg/m×__m=__kg
W3=___kg
Liquid pipe
20
Total
refrigerant
volume
charging on
site during
installation
(kg)
W2+W3=
___kg
Connection wire
over 20cm
W: Total
refrigerant
volume
charging
on site for
maintenance
W1+W2+
W3=___kg
Adhesive tape
Gas pipe
Heat insulator