Mitsubishi Electric PL18FK2 Service And Parts Manual page 94

FRESH AIR INTAKE (Installation at site)
1.
Location for installing fresh air intake
*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 PL18/24FK2, PLL12/18/24FK.
/
Detail drawing of fresh air intake]
Fresh-& P-V curve
2 0 0
- I ~ I ~ I ~ P+
-20
Ambient air flow [CFM]
Be sure to secure insulation
-
<' % ;.
-
3. Sequential operation method with duct fan.
material by tape and such
,
,.
.
,
I
Indoor unlt
(Booster fan)
I I
I
microprocessor
-
I I
Yellow
I
Have the duct fan 'ON' whenever indoor is in operation
g j :
- - - 0 :
:;
.-.
I
mode (air-conditioning and fan).
z q i &
Orange-
_,
.
- - - -
,
, . , . I
Ix
,:MB\
.
.,
(1 ) Connect optional multiple remote controller adapter
Brown
,-
-
-
- -
-
-
-1
(PAC-725AD) to indoor microprocessor board CN5 1
.
Package side
1
Installation at site
(2) Drive the relay after connecting the DC12V relay
ic------ Adapter
T
(PAC-725AD) \
Be sure t o secure insulation
between the Yellow and Orange connector lines.
material by tape and such
(
*
)Use a relay under 1 W.
MB
:
Electromagnetic open/close power relay for duct fan.
Distance between indoor
X:Auxilian/ relay (DC12V LY-1 F). microprocessor board and
relay must be within
30 feet.
(PAC-725AD)
air valve (CFM)
1 5 0
V:Fresh
1 0 0
area
2. Air flow & static pressure conditions for fresh
air intake
0
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.
g
-4
0
' 5
e!
a
-8
-
E
3
-12
Booster fan required