4-2. Air capacity taken from outside
50.0
-50.0
-100.0
0.0
0.5
1.0
Air flow (m
3
/min)
2 intakes
1 intake
Characteristic diagram of air capacity taken from outside
Static pressure (Pa)
1.5
2.0
2.5
0.0
PMH-P1.6BA
PMH-P2BA
10.0m
3
/min
11.0m
3
/min
2.0m
3
/min
2.2m
3
/min
Air flow
(Hi)
Air capacity taken outside
PMH-P·BA series are possible to be taken air from outside.
When taking air from the outside, the duct fan can be used to.
The air capacity should be 20% or less of the air flow SPEC(Hi).
Q…Planned 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 conditioner 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 system 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 with out D <Pa>
(Knock out)
4-
{
2.8
Flesh air intake hole
(Knock out)
Flesh air intake hole
90
-
{
122
{
100
108
250
288.5
Q
0
B
A
C
1
2
3
Curve in the
left praphs.
Duct characteristics
at site
Q
A
EC
Q
Qa
AD
How to read curves
9
