Vacuum Mode; Thermal Insulation Of Refrigerant Piping - LG ARUN050LMC0 Installation Manual

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
SW01C ( : confirm)
7-Segment
SW02C ( : backward)
SW03C ( : forward)
SW01D (reset)
SW04C ( X : cancel)
DIP SWITCH
Master unit 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 Master unit 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
• Be sure to fully insulate connecting portion.
www.lgcomfortcooling.co.uk
D
B
Heat insulation
material polyethylene foam + Adhesive tape
Indoor
Floor
Outer
exposed
covering
Outdoor
Bad example
Ⓐ Liquid pipe
Ⓑ Gas pipe
ⓒ Power lines
C
ⓓ Finishing tape
ⓔ Insulating material
D
E
ⓕ Communication lines
A
Ⓐ These parts are not insulated.
Good example
C
Power lines Communication lines
D
A
E
Separation
19
Adhesive + Heat - resistant
Vinyl tape
Water-proof hemp cloth +
Bronze asphalt
Water-proof hemp cloth +
Zinc plate + Oily paint
Ⓐ Liquid pipe
Ⓑ Gas pipe
ⓒ Power lines
ⓓ Insulating material
ⓔ Communication lines