Way Air Flow System - Mitsubishi Electric PLFY-P15VFM-E1 Technical & Service Manual

4

4-WAY AIR FLOW SYSTEM

4-1. 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
4-2. FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS
PLFY-P15VFM-E1.TH
PLFY-P32VFM-E1.TH
Taking air into the unit
0.3 0.6
0
−30
−60
−90
−120
−150
Air flow : Q [m
NOTE: Fresh air intake amount should be 10% or less of
whole air amount to prevent dew dripping.
4-3. OPERATION IN CONJUNCTION WITH DUCT FAN (Booster fan)
• Whenever the indoor unit operates, the duct fan also
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 12 V DC relay
between the Yellow and Orange connector wires.
MB: Electromagnetic switch power relay for duct fan.
X: Auxiliary relay
(For 12 V DC, coil rating: 1.0 W or below)
OCH617
Refrigerant pipe Electrical Box
PLFY-P20VFM-E1.TH
PLFY-P40VFM-E1.TH
0.9 1.2 1.5
/min]
3
Detail drawing of fresh air intake
140
Burring hole
120°
Ceiling surface
Drain pipe
PLFY-P25VFM-E1.TH
PLFY-P50VFM-E1.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)
Brown
Indoor unit side
Multiple remote
controller adapter
PAC-SA88HA-E
CN51
Multiple remote
controller adapter
PAC-SA88HA-E
Indoor controller board
13
Cut out hole
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
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
Qa ... Estimated amount of fresh air
intake without D
~
Be sure to secure insulation
material by tape, etc.
−
Yellow
+
Orange
Red
Installation at site
Be sure to secure insulation
material by tape, etc.
<m /min>
3
<Pa>
<Pa>
<Pa>
<Pa>
<Pa>
<m /min>
3
MB
Distance between
indoor controller board
and relay must be
within 10m.