Way Air Flow System - Mitsubishi Electric PLFY-P20VCM-E 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
Refrigerant pipe
4-2. Fresh air intake amount & static pressure characteristics
PLFY-P20VCM-E.TH
PLFY-P25VCM-E.TH
PLFY-P32VCM-E.TH
PLFY-P40VCM-E.TH
Taking air into the unit
Static pressure : P [Pa]
50
0.5 1.0 1.5 2.0 2.5 3.0 3.5
0
-50
-100
-150
-200
-250
-300
NOTE: Fresh air intake amount should be 20% or less of
whole air amount to prevent dew dripping.
4-3. Interlocking operation method with
duct fan (Booster fan)
• Whenever the indoor unit is operating, the duct fun 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 12V DC relay
between the Yellow and Orange connector lines.
MB: Electromagnetic switch power relay for duct fan.
X: Auxiliary relay (For DC 12V, coil rating : 1.0W or below)
Drain pipe
Electrical Box
3
Air flow : Q [m /min]
CN51
on indoor
controller board
Detail drawing of fresh air intake
[100 25
3-[2.8 hole
Cut out hole
Burring hole
Ceiling surface
How to read curves
Duct characteristics
Curve in the
at site
1
left praphs.
0
Q
2
Q
3
Q
Qa
Green
5
1
Connector (5P)
Red
Brown
Package side
Multiple remote
controller adapter
PAC-SA88HA-E
Indoor controller board
Multiple remote
controller adapter
PAC-SA88HA-E
CN51
10
[73.4
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
amount of fresh air intake dust sys-
tem for air flow amount Q <Pa>
E ... Static pressure of indoor unit with air
flow amount Q
Qa ... Estimated amount of fresh air
intake with out D <m
Be sure to secure insulation
material by tape and such
Yellow
Orange
Installation at site
Be sure to secure insulat
material by tape and such
Distance between indoo
controller board and rela
CN51
must be within 10m.
<m /min>
3
<Pa>
<Pa>
<Pa>
increase
<Pa>
3 /min>
~
M