10
4
4-WAY AIR FLOW SYSTEM
4-1. 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.
Detail drawing of fresh air intake
Ceiling surface
Refrigerant pipe
Drain pipe
Electrical Box
Cut out hole
[
73.4
Burring hole
3-
[
2.8 hole
[
100
118
25
120
°
120
°
Fresh air intake
Static pressure : P [Pa]
Air flow : Q [m
3
/min]
50
-50
-100
-150
-200
-250
-300
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
PLFY-P20VCM-E.TH
PLFY-P25VCM-E.TH
PLFY-P32VCM-E.TH
PLFY-P40VCM-E.TH
Taking air into the unit
4-2. Fresh air intake amount & static pressure characteristics
Q
0
B
A
C
1
Curve in the
left praphs.
Duct characteristics
at site
Q
A
E
C
2
Q
Qa
A
D
3
Q…Planned amount of fresh air intake
A…Static pressure loss of fresh air
intake duct system with air flow
amount Q
B…Forced static pressure at air condi-
tioner inlet with air flow amount Q
C…Static pressure of booster fan with
air flow amount Q
D…Static pressure loss increase
amount of fresh air intake dust sys-
tem for air flow amount Q <Pa>
E…Static pressure of indoor unit with air
flow amount Q
Qa…Estimated amount of fresh air
intake with out D
<m
3
/min>
<m
3
/min>
<Pa>
<Pa>
<Pa>
<Pa>
How to read curves
NOTE: Fresh air intake amount should be 20% or less of
whole air amount to prevent dew dripping.
4-3. Interlocking operation method with
duct fan (Booster fan)
• Whenever the indoor unit is operating, the duct fun also
operates.
(1)Connect the optional multiple remote controller
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 connector lines.
MB: Electromagnetic switch power relay for duct fan.
X: Auxiliary relay (For DC 12V, coil rating : 1.0W or below)
CN51
Multiple remote
controller adapter
PAC-SA88HA-E
Indoor controller board
Distance between indoo
controller board and rela
must be within 10m.
Be sure to secure insulation
material by tape and such
5
Green
Yellow
Orange
Connector (5P)
Package side
Multiple remote
controller adapter
PAC-SA88HA-E
Be sure to secure insulat
material by tape and such
Installation at site
CN51
on indoor
controller board
Red
Brown
1
~
CN51
M
OC314--1.qxp 04.8.27 11:43 Page 10
