Service manual

14
4-3. AIR CAPACITY TAKEN FROM OUTSIDE
PMFY-P·VBM-E series enables to take fresh air from outside. When taking fresh air, the duct fan is used.
The air capacity should be 20% or less of the air flow SPEC(Hi).
50.0
-50.0
-100.0
0.0 0.5 1.0
Air flow (m
3
/min)
2 intakes
1 intake
Characteristic diagram of fresh air taken capacity
Static pressure (Pa)
1.5 2.0 2.5
0.0
PMFY-P20VBM-E
PMFY-P20VBM-E
1
PMFY-P20VBM-E#2
PMFY-P25VBM-E
PMFY-P25VBM-E
1
PMFY-P25VBM-E#2
PMFY-P32VBM-E
PMFY-P32VBM-E
1
PMFY-P32VBM-E#2
PMFY-P40VBM-E
PMFY-P40VBM-E
1
PMFY-P40VBM-E#2
8.7m³/min
9.3m³/min
9.3m³/min
10.7m³/min
Max 1.74m³/min
Max 1.86m³/min
Max 1.86m³/min
Max 2.14m³/min
Air flow (Hi) Air capacity from outsideService Ref.
PMFY-P20VBM-ER3
PMFY-P20VBM-ER4
PMFY-P25VBM-ER3
PMFY-P25VBM-ER4
PMFY-P32VBM-ER3
PMFY-P32VBM-ER4
PMFY-P40VBM-ER3
PMFY-P40VBM-ER4
(Knockout)
4-W2.8
Fresh air intake hole
(Knockout)
Fresh air intake hole
90
W
122
W
100
108
250 288.5
Unit : mm
Installation at site
1
~
CN51
Multiple remote
controller adapter
PAC-SA88HA-E
Indoor controller board
Distance between indoor
controller board and relay
must be within 10m.
Be sure to secure insulation
material by tape, etc.
5
Green
Yellow
Orange
Connector (5P)
Indoor unit side
Multiple remote
controller adapter
PAC-SA88HA-E
Be sure to secure insulatio
n
material by tape, etc.
CN51
on
indoor unit
board
Red
Brown
MB
Q
0
B
A
C



Curve in the
right graphs
Duct characteristics
at site
Q
A
EC
Q
Qa
AD
Operation in conjunction with duct fan (Booster fan)
● Whenever the indoor unit is operating, the duct fun
operates.
(1) Connect the optional multiple remote controller
adapter (PAC-SA88HA-E) to the connector CN51
on the indoor controller board.
(2) Drive the relay after connecting the 12V DC relay
between the Yellow and Orange connector lines.
(
*
) Use a relay of 1W or smaller.
MB: Electromagnetic switch power relay for duct fan.
X: Auxiliary relay (12V DC LY-1F)
How to read curves
Q…Designed 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 condi-
tioner 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 duct 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 without D <m
3
/min>
OC307E