9
5
4-WAY AIR FLOW SYSTEM
5-3. OPERATION IN CONJUNCTION
WITH DUCT FAN (BOOSTER FAN)
• Whenever the indoor unit is operating, the duct
fun also operates.
(1) Connect the optional multiple remote control-
ler adapter (PAC-SA88HA-E) to the connector
CN51 on the indoor controller board.
(2) Drive the relay after connecting the 12V DC
relay between the Yellow and Orange con-
nector wires.
(*) Use a relay of 1W or smaller.
MB: Electromagnetic switch power relay for duct
fan.
X: Auxiliary relay (For DC 12V, coil rating : 1.0W
or below)
5-1. FRESH AIR INTAKE (Location for installation)
At the time of installation, use the duct holes (cut out) located at the positions shown in following diagram, as and when required.
Refrigerant pipe
Drain pipe
Electrical Box
Fresh air intake
Fresh air intake hole diagram (Unit : inch)
3 -
W
1/8
Burring hole
W
3-15/16
Burring hole pitch
W
2-7/8
(Cut out hole)
Ceiling surface
120
"
120
"
4-21/32
Static pressure : P [in. W.G.
%
10
-2
]
Air flow : Q [CFM]
20
-20
-40
-60
-80
-100
-120
0
20
40
60
80
100 120
PLFY-P08NCMU-E
(1)
.TH PLFY-P12NCMU-E
(1)
.TH PLFY-P15NCMU-E
(1)
.TH
PLFY-P08NCMU-ER2.TH PLFY-P12NCMU-ER2.TH PLFY-P15NCMU-ER2.TH
Taking air into the unit
5-2. FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS
Q
0
B
A
C
1
Curve in the
left graphs
Duct characteristics
at site
Q
A
EC
2
Q
Qa
AD
3
NOTE: Fresh air intake amount should be 20% or less of
whole air amount to prevent dew dripping.
CN51
Multiple remote
controller adapter
PAC-SA88HA-E
Indoor controller board
Distance between indoor
controller board and relay
must be within 33ft.
Be sure to secure insulation
material by tape, etc.
5
Green
Yellow
Orange
Connector (5P)
Indoor unit side
Multiple remote
controller adapter
PAC-SA88HA-E
Be sure to secure insulation
material by tape, etc.
Installation at site
CN51
on
indoor unit
board
Red
Brown
1
~
CN51
MB
How to read curves
Q…Designed amount of fresh air intake
<CFM>
A…Static pressure loss of fresh air
intake duct system with air flow
amount Q
<in. W.G.
o
10
-2
>
B…Forced static pressure at air condi-
tioner inlet with air flow amount Q
<in.
W.G.
o
10
-2
>
C…Static pressure of booster fan with
air flow amount Q <in. W.G.
o
10
-2
>
D…Static pressure loss increase
amount of fresh air intake duct sys-
tem for air flow amount Q
<in.
W.G.
o
10
-2
>
E…Static pressure of indoor unit with
air flow amount Q <in. W.G.
o
10
-2
>
Qa…Estimated amount of fresh air
intake without D
<CFM>
