Mitsubishi Electric City Multi PMFY-P06NBMU-E Technical & Service Manual page 7

4-3. AIR CAPACITY TAKEN FROM OUTSIDE
PMFY-P·NBMU-E series are capable of taking air from outside. When taking air from outside, the duct fan is used.
The air capacity should be 20% or less of the airflow SPEC(Hi).
Service Ref.
PMFY-P06NBMU-E
PMFY-P06NBMU-E
1
PMFY-P08NBMU-E
PMFY-P08NBMU-E
1
PMFY-P12NBMU-E
PMFY-P12NBMU-E
1
PMFY-P15NBMU-E
PMFY-P15NBMU-E
1
Operation in conjunction with duct fan (Booster fan)
Whenever the indoor unit is operating, the duct fan
operates.
(1)Connect the optional multiple remote controller
adaptor (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.
(w)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
Duct characteristics
Curve in the
at site
1
right graphs
0
Q
2
Q
3
Q
Qa
9-13/16 11-3/8
Fresh air intake hole
(Knockout)
Air flow (Hi)
300 CFM
320 CFM
320 CFM
370 CFM
Q...Designed amount of fresh air
intake <CFM>
A...Static pressure loss of fresh air
intake duct system with air flow
amount Q <in. W.G>
B...Forced static pressure at air condi-
tioner inlet with air flow amount Q
<in. W.G>
C...Static pressure of booster fan with
air flow amount Q <in. W.G>
D...Static pressure loss increase
amount of fresh air intake duct
system for air flow amount Q
<in. W.G>
E...Static pressure of indoor unit with
air flow amount Q <in. W.G>
Qa...Estimated amount of fresh air
intake without D <CFM>
90-
Fresh air intake hole
(Knockout)
Air capacity taken from outside
60 CFM
64 CFM
64 CFM
74 CFM
Green
CN51 5
on
indoor unit
1
board
Connector (5P)
Indoor unit side
Multiple remote
controller adapter
PAC-SA88HA-E
Indoor controller board
Multiple remote
controller adapter
PAC-SA88HA-E
Characteristic diagram of air capacity taken from outside of PMFY-P·NBMU-E
0.2
0.1
00
-0.1
-0.2
-0.3
-0.4
0 10 20
7
4-{1/8
(Unit:inch)
Be sure to secure insulation
material by tape, etc.
Yellow
Orange
Red
Brown
Installation at site
Be sure to secure insulation
material by tape, etc.
Distance between indoor
controller board and relay
must be within 33 feet.
CN51
30 40 50 60
Air flow (CFM)
~
MB
2 intake
1 intake
70 80