Install The Connecting Pipe - EAS Electric VRV EVR 6 Series Instruction Manual

NOTE
All the pictures in this manual are for explanation purpose only.
They may be slightly different from the air conditioner you
purchased(depend on model).The actual shape shall prevail.

4. INSTALL THE CONNECTING PIPE

Water discharge pipe
Check whether the height drop between the indoor unit and
Remote controller
outdoor unit, the length of refrigerant pipe, and the number of
the bends meet the following requirements:
ODU
Air outlet
Mounting
bracket
4.1 Refrigerant piping
CAUTION
Please pay attention to avoid the components while connect to
the connecting pipes.
To prevent the refrigerant piping from oxidizing inside when
welding, it is necessary to charge nitrogen, or oxide will chock
the circulation system.
The indoor and outdoor connecting pipe interface and power
line outlet
Vavious piping and viring 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）
Table 4-1
Front out pipe Side out pipe
IDU
Refrigerant connecting
pipe
Air inlet
Refrigerant pipe
connector
Fig.4-1
Fat pipe
Undersurface out pipe
Back out pipe
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
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.
4.2 Leak Detection
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.
IDU check point
ODU check point
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 sufcient insulation measures
to prevent condensation (see the fgure on the right).
The gas-side pipe must be treated with the closed-cell foam
insulation material, which reaches the non-fammable 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 aves
no gaps.
The unit body
14
CAUTION
D
C
B
A
Fig. 4-2
Cut from upward
Site pipe side
Affiliated heat pump belt
Fig. 4-3
V.1