LG GHP SUPER - Page 36

36
PIPE CONNECTIONS BETWEEN INDOOR/OUTDOOR UNITS
ENGLISH
Ⓐ To Branch Piping or Indoor Unit
Ⓑ To Outside Unit
Y branch
• Make sure that the two outlet pipes of Y
branch are attached horizontally. (see the
diagram below)
• Horizontal installation is recommended for Y
branch.
However, if there is no other way but verti-
cal installation, then install the branch up
straight. (If the branch is not installed hori-
zontally, it may cause refrigerant drift and
result in deterioration of cooling/heating per-
formance.)
• If the diameter of the selected refrigerant
pipe is different from the one of the joint,
cut a modified joint to adjust in the Y branch
before using. (When cutting the modified
joint section, remove the burr on the cut sur-
face completely. Be extra careful not to let
the burr into the Y branch.)
• Be sure to let nitrogen gas flow in the pipe
when welding.
Otherwise, the excessive sludge formed
inside the pipe may cause a malfunction of
the unit.
Branch Installation Method
A
B
A
B
Viewed from point B
Horizontal plane
±15°
(×)
(×)
C
Facing
downwards
Facing
upwards
Within ±3° Within ±3°
<Horizontal installation>
<Vertical installation>
Header Branch
• The indoor unit with larger capacity must be
installed closer to A than the smaller one.
• If the diameter of the refrigerant pipe select-
ed by the procedures described earlier is dif-
ferent from the one of the joint section, the
connecting joint section should be adjusted
using a modified joint. A modified joint is
included in the branch pipe.
Ⓐ A pipe cutter
Ⓑ To indoor unit
Ⓒ Connecting to pipe
Ⓓ Modified joint
• If the number of pipes to be connected is
smaller than the number of header branch
pipes, seal the unconnected branch pipes.