Mitsubishi Electric PLFY Series Technical & Service Manual page 12

4-4. FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS
PLFY-WL06/08/12/15/18/24/30/36/48NEMU-E
Taking air into the unit
50(20)
0
-50(-20)
-100(-40)
-150(-60)
0 0.2 0.4
10
Multi-functional casement + High efficiency filter
50(20)
0
-50(-20)
-100(-40)
1 - inlet
-150(-60)
-200(-80)
0 1 2
50
TCH124A
0.6 0.8 1 1.2
20 30 40
Airflow rate
2 - inlet
3 4 5
100 150 200
Airflow rate
Multi-functional casement + Standard filter
50(20)
0
-50(-20)
-100(-40)
-150(-60)
-200(-80)
0 1
1.4 [CMM]
50
[CFM]
How to read curves
Duct characteristics
Curve in the
at site
1
graphs
0
Q
2
Q
6 [CMM]
[CFM]
3
Q
Qa
12
2 - inlet
1 - inlet
2 3 4 5
100 150
Airflow rate
Q...Designed amount of fresh air intake
A...Static pressure loss of fresh air intake
duct system with airflow amount Q
<Pa (in.W.G.o10-2)>
B...Forced static pressure at air condi-
tioner inlet with airflow amount Q
<Pa (in.W.G.o10-2)>
C...Static pressure of booster fan with
airflow amount Q <Pa (in.W.G.o10-2)>
D...Static pressure loss increase amount
of fresh air intake duct system for air-
flow amount Q <Pa (in.W.G.o10-2)>
E...Static pressure of indoor unit with
airflow amount Q <Pa (in.W.G.o10-2)>
Qa...Estimated amount of fresh air intake
without D <CMM (CFM)>
[CMM]
6
200 [CFM]
<CMM (CFM)>