Mitsubishi Electric PLA-A·BA4 Technical Data Manual page 77

10-3. PCA-A·KA4/5
FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS
C
A
■
PCA-A24, 30KA4
50(20)
0
-50(-20)
-100(-40)
-150(-60)
-200(-80)
-250(-100)
-300(-120)
0
■
PCA-A36KA4, 42KA5
50(20)
0
-50(-20)
-100(-40)
-150(-60)
-200(-80)
-250(-100)
-300(-120)
0 1
A
B
1 2 3
50 100
Airflow rate
2 3
50 100
Airflow rate
Fresh air intake hole
At the time of installation, use the duct holes (knock out)
located at the positions shown in the left diagram, as and
when required.
Indoor unit
A
Fresh air intake hole (knock out hole)
B
Filter
C
A
10-3/16
(259.5)
How to read curves
Duct characteristics
Curve in the
at site
1
graphs
0
Q
2
4 [CMM]
[CFM]
Q
3
Q
Qa
4 [CMM]
[CFM]
in. (mm)
B C
ø 3-15/16 4-5/16
(ø 100) (109)
Q ... Designed amount of fresh air intake
A ... Static pressure loss of fresh air
intake duct system with airflow
amount Q
B ... Forced static pressure at air con-
ditioner inlet with airflow amount Q
C ... Static pressure of booster fan with
airflow amount Q <Pa(in.W.G.x10
D ... Static pressure loss increase amount
of fresh air intake duct system for
airflow amount Q <Pa(in.W.G.x10
E ... Static pressure of indoor unit with
airflow amount Q <Pa(in.W.G.x10
Qa ... Estimated amount of fresh air
intake without D
<CMM(CFM)>
<Pa(in.W.G.x10 -2 )>
<Pa(in.W.G.x10 -2 )>
-2 )>
-2 )>
-2 )>
<CMM(CFM)>
77
77