Main PCB DIP switch ON ( No.11,14)
Vacuum mode setting
ODU V/V OPEN
Main EEV, SC EEV OPEN
IDU EEV OPEN
ODU power reset
Press the black button Main PCB (5 sec.)
Main PCB
SW01S
Main PCB
SW02B
Main PCB
SW01V
Vacuum mode setting method
Vacuum mode cancellation method
Main PCB DIP switch OFF( No.11,14)
Power reset
Vacuum mode cancellation
14
ENGLISH
CAUTION
ODU operation stops during vacuum mode. Compressor can't
operate.
!
Be sure to give insulation work to refrigerant piping by covering liquid
pipe and gas pipe separately with enough thickness heat-resistant poly-
ethylene, so that no gap is observed in the joint between indoor unit
and insulating material, and insulating materials themselves. When in-
sulation 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 in-
sulation material with a finishing tape.)
Heat insulation
material
Adhesive + Heat - resistant poly-
ethylene 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 roof-
ing shall not be required.
Bad example
• Do not insulate gas or low pressure pipe and liquid or highpres-
sure 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
Good example
Ⓐ Liquid pipe
Ⓑ Gas pipe
Ⓒ Power lines
Ⓓ
Insulating material
Ⓔ
Communication lines
Communication lines
Separation
Power lines
E
D
D
B
A
C
Penetrations
Ⓐ Sleeve
Ⓑ Heat insulating material
Ⓒ Lagging
Ⓓ Caulking material
Ⓔ Band
Ⓕ Waterproofing layer
Ⓖ Sleeve with edge
Ⓗ Lagging material
Ⓘ Mortar or other incombustible
caulking
Ⓙ Incombustible heat insulation ma-
terial
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 incom-
bustible 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
Heat insulation of refrigerant piping
Vacuum Mode
This function is used for creating vacuum in the system after compres-
sor replacement, ODU parts replacement or IDU addition/replacement.
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