OC194-47
FRESH AIR INTAKE (Installation at site)1. Location for installing fresh air intake
2. Air flow & static pressure conditions for fresh
air intake
Detail drawing of fresh air intake
Be sure to use a duct fan (booster fan) when applying fresh
air intake.As for sequential operation with the duct fan, see
Item 3.
3. Sequential operation method with duct fan.
(Booster fan)
●Have the duct fan “ON”whenever indoor is in operation
mode (air-conditioning and fan).
(1) Connect optional multiple remote controller adapter
(PAC-725AD) to indoor microprocessor board CN51.
(2) Drive the relay after connecting the DC12V relay
between the Yellow and Orange connector lines.
* Use a relay under 1W.
MB:
Electromagnetic open/close power relay for duct fan.
X:Auxiliary relay (DC12V LY-1F).
4
0
–4
–8
–12
–16
–20
Fresh-Air P-V curve
P[in.W.G]O10–1
External pressure of duct
50 100
V:Fresh air valve [CFM]
Booster fan required area
150 200
Ambient air flow [CFM]
Be sure to secure insulation
material by tape and such
Be sure to secure insulation
material by tape and such
Green
Yellow
Orange
Red
Brown
5
1
Connector (5P)
Package side Installation at site
MB
Adapter
(PAC-725AD)
Indoor unit
microprocessor
board
CN51
●The fresh air intake duct can be connected by removing the knockout holes on the casing of the indoor unit and attaching the
fresh air intake flange and duct.When applying fresh air intake, confirm that the mixed air is within applicable conditions as the
intake air mixes with the ambient air.
Figure is for PL12/18/24FK
Indoor unit microprocessor board.
Distance between indoor
microprocessor board
and relay must be within
30 feet.
CN51
Adapter
(PAC-725AD)