B-17
4-W
A
Y
AIRFLOW
SYSTEM
600
o
600
CEILING
CASSETTE
CEILING CASSETTE
S series
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
11
8
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
Taking air into the unit
2. FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS
SLZ-KA25VAL SLZ-KA25VA
SLZ-KA35VAL SLZ-KA35VA
SLZ-KA50VAL SLZ-KA50VA
Q
0
B
A
C
1
Curve in the
left graph
Duct characteristics
at site
Q
A
EC
2
Q
Qa
AD
3
How to read curves
Whenever the indoor unit operates, the
duct fan 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.
Use a relay of 1W or smaller.
MB: Electromagnetic switch power
relay for duct fan.
X: Auxiliary relay (12V DC LY-1F)
Multiple remote
controller adapter
PAC-SA88HA-E
Indoor controller board
Distance between indoor
controller board and relay
must be within 10m.
Be sure to secure insulation
with tape, etc.
5
Green
Yellow
Orange
Connector (5P)
Indoor unit side
Multiple remote
controller adapter
PAC-SA88HA-E
Be sure to secure insulation
with tape, etc.
Installation at site
CN51
on
indoor unit
board
Red
Brown
1
~
CN51
MB
CN51(WHT)
3. OPERATION IN CONJUNCTION WITH DUCT FAN (BOOSTER FAN)
NOTE: Fresh air intake amount should be 20% or less of
whole air amount to prevent dew dripping.
B.1.6 4-WAY AIR FLOW SYSTEM
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.
Q…Designed amount of fresh air intake
<m
3
/min>
A…Static pressure loss of fresh air
intake duct system with air flow
amount Q
<Pa>
B…Forced static pressure at air condi-
tioner inlet with air flow amount Q
<Pa>
C…Static pressure of booster fan with
air flow amount Q
<Pa>
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
<Pa>
Qa…Estimated amount of fresh air
intake without D
<m3/min>