31
ENGLISH
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.
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.)
Heat insulation
material
Ad Heat - resistant
polyethylene foam + Adhesive tape
Outer
covering
Indoor
Vinyl tape
Floor
exposed
Water-proof hemp cloth +
Bronze asphalt
Outdoor
Water-proof hemp cloth +
Zinc plate + Oily paint
NOTE
!
When using polyethylene cover as covering material, asphalt
roofing shall not be required.
Thermal insulation of refrigerant piping
Bad example
• Do not insulate gas or low pressure pipe and liquid or
highpressure pipe together.
• Be sure to fully insulate connecting portion.
Ⓐ
These parts are not insulated.
Ⓐ
Liquid pipe
Ⓑ
Gas pipe
Ⓒ
Power lines
Ⓓ
Finishing tape
Ⓔ
Insulating material
Ⓕ
Communication lines
A
C
D
E
B
F
A
Good example
Ⓐ
Liquid pipe
Ⓑ
Gas pipe
Ⓒ
Power lines
Ⓓ
Insulating material
Ⓔ
Communication lines
Communication lines
Separation
Power lines
E
D
D
B
A
C
A
B
E
B
I
A
B
D
C
1 m
(3.28 ft)
1 m
(3.28 ft)
D
F
G
B
G
D
B
H
I
J
A
F
Penetrations
Ⓐ
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.)
Inner wall (concealed)
Outer wall
Outer wall (exposed)
Floor (fireproofing)
Penetrating portion on fire
limit and boundary wall
Roof pipe shaft
