Way Air Flow System - Mitsubishi Electric City Multi PLFY-P08NCMU-E Technical & Service Manual

5

4-WAY AIR FLOW SYSTEM

5-1. FRESH AIR INTAKE (Location for installation)
At the time of installation, use the duct holes (cut out) located at the positions shown in following diagram, as and when required.
Fresh air intake
5-2. FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS
PLFY-P08NCMU-E
(1)
PLFY-P08NCMU-ER2.TH PLFY-P12NCMU-ER2.TH
Taking air into the unit
Static pressure : P [in. W.G. 10
20
20 40
0
-20
-40
-60
-80
-100
-120
NOTE: Fresh air intake amount should be 20% or less of
whole air amount to prevent dew dripping.
5-3. OPERATION IN CONJUNCTION
WITH DUCT FAN (BOOSTER FAN)
• Whenever the indoor unit is operating, the duct
fun also operates.
(1) Connect the optional multiple remote control-
ler 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 con-
nector wires.
(*) Use a relay of 1W or smaller.
MB: Electromagnetic switch power relay for duct
fan.
X: Auxiliary relay (For DC 12V, coil rating : 1.0W
or below)
Electrical Box
Refrigerant pipe
.TH PLFY-P12NCMU-E
-2
]
Air flow : Q [CFM]
60 80 100 120
Fresh air intake hole diagram
3 - 1/8
Burring hole
Drain pipe
.TH PLFY-P15NCMU-E
(1)
PLFY-P15NCMU-ER2.TH
How to read curves
Duct characteristics
Curve in the
at site
1
left graphs
0
Q
2
Q
3
Q
Qa
Green
CN51 5
on
indoor unit
1
board
Connector (5P)
Indoor unit side
Indoor controller board
Multiple remote
controller adapter
PAC-SA88HA-E
CN51
9
3-15/16
Burring hole pitch
2-7/8
(Cut out hole)
Ceiling surface
.TH
(1)
Q ... Designed 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 <in. W.G.o10
D ... Static pressure loss increase
amount of fresh air intake duct sys-
tem for air flow amount Q
E ... Static pressure of indoor unit with
air flow amount Q <in. W.G.o10
Qa ... Estimated amount of fresh air
intake without D
Be sure to secure insulation
material by tape, etc.
Yellow
Orange
Red
Brown
Installation at site
Multiple remote
controller adapter
Be sure to secure insulation
PAC-SA88HA-E
material by tape, etc.
Distance between indoor
controller board and relay
CN51
must be within 33ft.
(Unit : inch)
<CFM>
<in. W.G.o10 -2 >
<in. W.G.o10 -2 >
-2
>
-2
<in. W.G.o10 >
-2 >
<CFM>
~
MB