5
Table 4-2
Select refrigerant pipe
Table 4-1
The indoor and outdoor connecting pipe interface and power
line outlet
Various piping and wiring patterns can be selected,such as out from
the front ,the back the side ,and undersurface, etc.
（
The follow
display the locations of several piping and wiring knock-off interfaces
）
Front out pipe
Back out pipe
Side out pipe
Undersurface out pipe
To prevent the refrigerant piping from oxidizing inside when
welding, it is necessary to charge nitrogen, or oxide will chock
the circulation system.
CAUTION
4. INSTALL THE CONNECTING PIPE
Check whether the height drop between the indoor unit and
outdoor unit, the length of refrigerant pipe, and the number of
the bends meet the following requirements:
4.1 Refrigerant piping
Fat pipe
Fig. 4-3
The unit body
Affiliated heat pump belt
Site pipe side
Cut from upward
4.3 Heat Insulation
Carry out heat insulation treatment for the pipes at the gas and
liquid sides respectively. Pipes on the liquid and air sides have a
low temperature during cooling. Take suficient insulation measures
to prevent condensation (see the figure on the right).
The gas-side pipe must be treated with the closed-cell foam
insulation material, which reaches the non-flammable level of B1
and heat resistance of over 120
℃
.
When the outer diameter of the copper pipe is not greater than
Φ12.7 mm, the thickness of insulation layer should be greater than
15 mm.
When the outer diameter of copper pipe is equal to or greater
than Φ15.9 mm, the thickness of insulation layer should be greater
than 20 mm.
The attached insulation material for the part of the IDU where
the pipe connects must undergo heat insulation treatment that
leaves no gaps.
Please pay attention to avoid the components while connect to
the connecting pipes.
outside, and then piping and wiring through this. Pay attention to
the piping the fat connecting pipe should out from the largest
hole, otherwise the pipes will be rubbed. Please do the moth
proofing for the knocked out hole, to avoid the pest processing
into and destroy the components.
Side out pipe: please remove the L-shape metal plate, otherwise
can not wiring.
Back out pipe: please wipe off the piping support rubber blanket
beside the inner outlet pipe cover of the machine while back side
getting out pipes.
Front out pipe: cut the frontal hole of the pipe-outlet plate.The
method of the out pipe in the same way of the back out pipe.
Undersurface outlet pipe: the knock out should from inside to
CAUTION
Use soapy water or a leak detector to check whether air leaks
at each joint.
A and B indicate check valves of ODU.
C and D indicate IDU connecting pipe ports.
4.2 Leak Detection
Fig. 4-2
Pipe definition
Pipe connect position
The pipe between outdoor unit to the
first branch of indoor unit.
The main pipes of
indoor unit
Code
Indoor unit branch
pipes components
L2 L5
L1
a,b,c,
d,e,f
A,B,C,
D,E
4.4 Connecting method
Main pipe
The branch pipes
of indoor unit
The pipe after the first branch do not
direct connect with the indoor unit.
The pipe after the branch connect with
the indoor unit.
The pipes connect with the main pipe
、
the branch pipe and the the main pipe
of indoor unit.
Fig.4-1
IDU check point
ODU check point
B
A
D
C
R410A
ODU
Air inlet
Mounting
bracket
Refrigerant connecting
pipe
Remote controller
Air outlet
Refrigerant pipe
connector
Water discharge pipe
Front out
pipe
Bottom out
pipe
Back out
pipe
The connect methond of flaring
Side out
pipe
For the 48kBtu/h outdoor unit's back out pipe connection, connecting
pipe is suggested to be used. For the 56kBtu/h outdoor unit's,
connecting pipe is suggested to be used in all directions out pipe
connection.
Connecting Pipe
(Accessorry)