Haier MRVIII-S AV08NMSETA Design, Installation & Maintenance Instruction page 52

Diameter (mm)
Ø6.35
Ø9.52
Ø12.7
Ø15.88
Ø19.05
Branch pipe
Branch pipe selection:
Total indoor capacity(100W)
Less than 335
More than 335, less than 506
Outdoor unit type
The master unit will choose the closest one to the 1st branch pipe.
Note:
1. When connecting the outdoor branch pipe and the outdoor, please pay attention to the
outdoor pipe dimension.
2. When adjusting the diameter among outdoor branch pipe and among the units, please must
execute at the branch pipe side.
3. Please install the outdoor branch pipe (gas/liquid side) in horizontal or vertical direction.
4. When welding with hard solder, please must blow nitrogen. If not, a number of oxide will be
produced and cause heavy damage.Besides,to prevent water and dust into the pipe, please
make the brim as outer roll.
Adhesive side
Cut off pipe with the cutter
Cut off at the middle
Pipe installation
When doing the piping connection, please do the following:
• Please don't let the pipe and the parts in the unit collide each other.
• When connecting the pipes, close the valves fully.
• Protect the pipe end against the water, impurity into the pipes (welding after being fl at, or
being sealed with adhesive tape).
• Bend the pipe as large semi-diameter as possible(over 4 times of the pipe diameter).
• The connection between outdoor liquid pipe and the distributing pipe is fl ared type. Please
expand the pipe with the special tool for R410A after installing the expanding nut. But if the
projecting pipe length has been adjusted with the copper pipe gauge, you can use the original
tool to expand the pipe.
Torque(N . m)
14~18
34~42
49~61
68~82
84~98
model(optional)
FQG-B335A
FQG-B506A
Prepare on fi eld
Floor
Right
52
Seal the connection and wrap the
heat insulator with adhesive tape
Horizontal
Wrong
Floor