LG MULTI V WATER IV ARWN080LAS4, Технический каталог изделия, Страница: 367 / 396

MULTI V Water IV
Heat Pump
8. Refrigerant Piping System
28
Installation of Outside Units
8.4 Oil trap application method between outside units
• Because of the possibility of oil being accumulated in the outside unit that has stopped, when there is a height
difference between outside unit pipes or if the pipe distance between the outside units is over 2m, you must
always apply an oil trap. (But, the oil trap between outside units is limited to 1 time and is only applied to the gas
pipe.)
• If the pipe distance between the outside units is 2m or below, and if the location of the main pipe is lower than
that of the outside unit and if the location of the main pipe is lower than that of the outside unit, the oil trap does
not have to be applied.
• If the location of the main pipe is higher than the location of the outside unit, be careful since the oil can be
accumulated in the stopped outside unit.
• If there is high/low difference between the outside unit pipes, oil can be accumulated to the outside unit on the
lower location until the unit stops.
 Examples of Wrong Pipe Connections
– The pipes between the outside unit must maintain horizontal levelness or give an inclination to prevent a back
flow toward the slave outside unit. Otherwise, the unit may not operate properly.
(Example 1)
(Example 2)
If the main pipe is higher
than the outside units, oil
is accumulated in the
outside unit.
If there are differences in the height between
the outside Unit, oil is accumulated in the
lower outside unit.
Oil Trap
Toward indoor unit
Toward indoor unit
Toward indoor unit
Pipe inclination (2 or more)
Toward indoor unit