Vacuum Mode; Thermal Insulation Of Refrigerant Piping - LG MULTI V S ARUB060GSS4 Installation Manual

WARNING
!
Use a vacuum pump or Inert(nitrogen) gas when doing leakage test
or air purge. Do not compress air or Oxygen and do not use
Flammable gases. Otherwise, it may cause fire or explosion.
- There is the risk of death, injury, fire or explosion.
!
NOTE
Always add an appropriate amount of refrigerant. (For the
refrigerant additional charge)
Too much or too little refrigerant will cause trouble.
To use the Vacuum Mode
(If the Vacuum mode is set, all valves of Indoor units and Outdoor
units will be opened.)
WARNING
!
When installing and moving the air conditioner to another site,
recharge after perfect evacuation.
- If a different refrigerant or air is mixed with the original
refrigerant, the refrigerant cycle may malfunction and the unit
may be damaged.

Vacuum Mode

This function is used for creating vacuum in the system after
compressor replacement, ODU parts replacement or IDU
addition/replacement.
Vacuum mode setting method
7-Segment
SW01C
( :confirm)
SW02C
( :backward)
SW03C
( :forward)
Service PCB DIP switch on : No.5
Select the mode using '▶', '◀' Button :
"SVC" Push the '●' button
Select the Function using '▶', '◀' Button :
"Se3" Push the '●' button
Start the vacuum mode : "VACC"
ODU V/V open
ODU EEV open
IDU EEV open
Vacuum mode off method
DIP switch off and push the reset button on Service PCB
CAUTION
!
ODU operation stops during vacuum mode. Compressor can't
operate.

Thermal insulation of refrigerant piping

Be sure to give insulation work to refrigerant piping by covering liquid
pipe and gas pipe separately with enough thickness heat-resistant
polyethylene, so that no gap is observed in the joint between indoor
unit and insulating material, and insulating materials themselves. When
insulation work is insufficient, there is a possibility of condensation
drip, etc. Pay special attention to insulation work to ceiling plenum.
Ⓐ Heat insulation material
Ⓑ Pipe
Ⓒ Outer covering(Wind the connection part and cutting part of heat
insulation material with a finishing tape.)
!
NOTE
When using polyethylene cover as covering material, asphalt
roofing shall not be required.
• Do not insulate gas or low pressure pipe and liquid or
highpressure pipe together.
A
SW01D
E
(reset)
SW04C
(x:cancel)
• Be sure to fully insulate connecting portion.
DIP-SWITCH
Ⓐ These parts are not insulated.
C
D
D
B
E
Heat insulation Adhesive + Heat - resistant
material polyethylene foam + Adhesive tape
Indoor Vinyl tape
Floor Water-proof hemp cloth +
Outer
exposed Bronze asphalt
covering
Water-proof hemp cloth +
Outdoor
Zinc plate + Oily paint
Bad example
Ⓐ Liquid pipe
Ⓑ Gas pipe
ⓒ Power lines
ⓓ Finishing tape
C
ⓔ Insulating material
D
ⓕ Communication lines
A
Good example
Power lines
Communication lines
Ⓐ Liquid pipe
A
Ⓑ Gas pipe
ⓒ Power lines
ⓓ Insulating material
ⓔ Communication lines
Separation
19