PLFY-25
PLFY-P-NCMU-ER4, -NBMU-E2 (November 2015)
© 2015 Mitsubishi Electric US, Inc.
Q Planned amount of fresh air intake
A Static pressure loss of fresh air
intake duct system with air flow
amount Q
B Forced static pressure at air condi-
tioner inlet with air flow amount Q
C Static pressure of booster fan with
air flow amount Q
D Static pressure loss increase
amount of fresh air intake dust sys-
tem for air flow amount Q
E Static pressure of indoor unit with air
flow amount Q
Qa Estimated amount of fresh air
intake with out D
<CFM>
Static pressure : P [in.W.G. 10
-2
]
Air flow : Q [CFM]
20
-20
-40
-60
-80
-100
-120
0
20
40
60
80
100 120
PLFY-P08,12,15 NCMU-E
Taking air into the unit
Q
0
B
A
C
1
Curve in the
left praphs.
Duct characteristics
at site
Q
A
EC
2
Q
Qa
AD
3
<CFM>
<in. W.G. 10
-2
>
<in. W.G. 10
-2
>
<in. W.G. 10
-2
>
<in. W.G. 10
-2
>
<in. W.G. 10
-2
>
NOTE: Fresh air intake amount should be 20% or less of
How to read curves
Refrigerant pipe
Drain pipe
Electrical Box
Fresh air intake
Fresh air intake hole diagram (Unit : inch)
3 - 1/8
Burring hole
3-15/16
Burring hole pitch
2-7/8
(Cut out hole)
Ceiling surface
120
120
4-21/32
whole air amount to prevent dew dripping.
Ref.:PLFY-NCMU-E_OAI_USDB
7. VENTILATION AIR INTAKE AMOUNT AND STATIC PRESSURE
7-1. PLFY-P08, 12, 15NCMU-ER4
7-2. PLFY-P08, 12, 15, 18, 24, 30, 36NBMU-E2
PLFY-P08, 12, 15, 18, 24, 30, 36NBMU-E2
By mounting the optional multi-function casement (PAC-SH53TM-E) to the indoor unit main body, and mounting the optional
duct flange(PAC-SH65OF-E) onto it further, fresh exterior air intake can be accomplished.
(The mounting of the multi-function casement increases the height of the ceiling plenum by 5-5/16(135mm).)
