Mitsubishi Electric PLFY-P20VEM-E Technical & Service Manual page 18

4-4. FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS
l PLFY-P20/25/32/40/50/63/80VEM-E.UK
Multi-functional casement + Standard filter
50
25
0
−25
−50
−75
−100
−125
−150
0 0.2 0.4
Airflow rate [m
Taking air into the unit
50
0
−50
−100
1 - inlet
−150
−200
0 1 2
Airflow rate [m
2 PLFY-P100/125VEM-E.UK
Multi-functional casement + Standard filter
50
0
−50
−100
−150
−200
0 0.2 0.4 0.6
Airflow rate [m
Taking air into the unit
50
0
−50
−100
1 - inlet
−150
−200
0 1 2
Airflow rate [m
OCH657
0.6 0.8 1 1.2
3
/min]
2 - inlet
3 4 5
3
/min]
0.8 1 1.2 1.4 1.6
3 /min]
2 - inlet
3 4 5 6
3
/min]
Multi-functional casement + High efficiency filter
50
0
−50
−100
−150
−200
0 1
1.4
How to read curves
Duct characteristics
Curve in the
at site
1
graphs
0
Q
2
Q
3
6
Q
Qa
Multi-functional casement + High efficiency filter
50
0
−50
−100
−150
−200
0 1
1.8
7
18
2 - inlet
1 - inlet
2 3 4
3
Airflow rate [m /min]
Q ... Designed amount of fresh air intake
A ... Static pressure loss of fresh air
intake air duct system with airflow
amount Q
B ... Forced static pressure at air condi-
tioner inlet with airflow amount Q
C ... Static pressure of booster fan with
airflow amount Q
D ... Static pressure loss increase amount
of fresh air intake duct system for
airflow amount Q
E ... Static pressure of indoor unit with
airflow amount Q
Qa ... Estimated amount of fresh air
intake without D
2 - inlet
1 - inlet
2 3 4 5
Airflow rate [m 3 /min]
5 6
<m /min>
3
<Pa>
<Pa>
<Pa>
<Pa>
<Pa>
<m 3 /min>
6 7