12
ENGLISH
6
If the diameters of the branch piping of the designated refrigerant
piping differs, use a pipe cutter to cut the connecting section and
then use an adapter for connecting different diameters to connect
the piping.
7
Always observe the restrictions on the refrigerant piping (such as
rated length, difference in height, and piping diameter).
Failure to do so can result in equipment failure or a decline in heat-
ing/cooling performance.
8
A second branch cannot be made after a header. (These are shown
by .)
To Outdoor Unit
Sealed Piping
A
A
B
9
The Multi V will stop due to an abnormality like excessive or insuffi-
cient refrigerant. At such a time, always properly charge the unit.
When servicing, always check the notes concerning both the piping
length and the amount of additional refrigerant.
10
Never perform a pump down. This will not only damage the com-
pressor but also deteriorate the performance.
11
Never use refrigerant to perform an air purge. Always evacuate air
by using a vacuum pump.
12
Always insulate the piping properly. Insufficient insulation will re-
sult in a decline in heating/cooling performance, drip of condensate
and other such problems.
13
When connecting the refrigerant piping, make sure the service
valves of the Outdoor Unit is completely closed (the factory set-
ting) and do not operate it until the refrigerant piping for the Out-
door and Indoor Units has been connected, a refrigerant leakage
test has been performed and the evacuation process has been
completed.
14
Always use a non-oxidizing brazing material for brazing the parts
and do not use flux. If not, oxidized film can cause clogging or dam-
age to the compressor unit and flux can harm the copper piping or
refrigerant oil.
A
B
WARNING
When installing and moving the air conditioner to another site, be
sure to make recharge refrigerant after perfect evacuation.
• If a different refrigerant or air is mixed with the original refriger-
ant, the refrigerant cycle may malfunction and the unit may be
damaged.
• After selecting diameter of the refrigerant pipe to suit total ca-
pacity of the indoor unit connected after branching, use an appro-
priate branch pipe set according to the pipe diameter of the
indoor unit and the installation pipe drawing.
!
- Pipe connections can be done on the front side or on the side accord-
ing to the installation environments.
- Be sure to let 0.2 kgf/cm
2
(2.8 psi) Nitrogen flow in the pipe when
welding.
- If Nitrogen was not flown during welding, many oxidized membranes
may form inside the pipe and disturb the normal operations of valves
and condensers.
Left Side
Pipe Draw
Out
Front Pipe Draw Out
Right
Side Pipe
Draw Out
Refrigerant Pipe
Regulator
Nitrogen
Taping
Valve
Nitrogen
Nitrogen
Direction
Direction
Nitrogen
Direction
Removal area for pipes
bottom side connections.
Knock Out for
communication cable
Knock Out for
power supply cable
Knock Out for
gas pipe
Knock Out for
Liquid pipe
CAUTION
• Do not give damage to the pipe/base during the Knock Out
work.
• Proceed to pipe work after removing burr after Knock Out work.
• Perform sleeve work to prevent damage to the wire when con-
necting wires using Knock Outs.
!
Preparation Work
- Use Knock Outs of Base Pan of the outdoor unit for Left/Right or
Bottom pipe drawing outs.
PIPE CONNECTIONS BETWEEN
INDOOR AND OUTDOOR UNIT
1,MFL67221438,영영 2018. 10. 4. 영영 11:29 Page 12
