LG Multi V PRHR033 Installation Manual page 31

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.
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
Outer
covering
Ⓐ 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.
Bad example
• Do not insulate gas or low pressure pipe and liquid or
highpressure pipe together.
A
C
D
E
• Be sure to fully insulate connecting portion.
A
Ⓐ These parts are not insulated.
Adhesive + Heat - resistant
polyethylene foam + Adhesive tape
Indoor Vinyl tape
Floor Water-proof hemp cloth +
exposed Bronze asphalt
Outdoor Water-proof hemp cloth +
Zinc plate + Oily paint
Ⓐ Liquid pipe
Ⓑ Gas pipe
ⓒ Power lines
ⓓ Finishing tape
ⓔ Insulating material
ⓕ Communication lines
Good example
C
Power lines
D
D
A
B
E
Penetrations
Inner wall (concealed) Outer wall
D
C
A
B
Floor (fireproofing) Penetrating portion on fire
limit and boundary wall
D
F
G
B
Ⓐ Sleeve
Ⓑ Heat insulating material
Ⓒ Lagging
Ⓓ Caulking material
Ⓔ Band
Ⓕ Waterproofing layer
Ⓖ Sleeve with edge
Ⓗ Lagging material
Ⓘ Mortar or other incombustible caulking
Ⓙ Incombustible heat insulation material
When filling a gap with mortar, cover the penetration part with steel
plate so that the insulation material will not be caved in. For this part,
use incombustible materials for both insulation and covering. (Vinyl
covering should not be used.)
Communication lines
Ⓐ Liquid pipe
Ⓑ Gas pipe
ⓒ Power lines
ⓓ Insulating material
ⓔ Communication
Separation
lines
Outer wall (exposed)
B
A
I
Roof pipe shaft
I
G
D
B
H
A
F
1 m 1 m
31
E
B
J