Mitsubishi Electronics PMFY-P08NBMU-E AIR Capacity Taken from Outside, How to read curves

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).

9-13/16	11-3/8	90-
				4-{1/8
				15/16
			3-
			{
		4-1/4
			{
			4
			-
			13/16
	Fresh air intake hole	Fresh air intake hole		(Unit:inch)
	(Knockout)	(Knockout)

Service Ref.	Air flow (Hi)	Air capacity taken from outside
PMFY-P06NBMU-E	300 CFM	60 CFM
PMFY-P06NBMU-E1
PMFY-P08NBMU-E	320 CFM	64 CFM
PMFY-P08NBMU-E1
PMFY-P12NBMU-E	320 CFM	64 CFM
PMFY-P12NBMU-E1
PMFY-P15NBMU-E	370 CFM	74 CFM
PMFY-P15NBMU-E1

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

			Be sure to secure insulation		~
			material by tape, etc.
CN51	5	Green
on			Yellow
indoor unit
	1		Orange		MB
board
	Connector (5P)		Red
	Indoor unit side		Brown	Installation at site
			Multiple remote
			controller adapter	Be sure to secure insulation
			PAC-SA88HA-E	material by tape, etc.

Indoor controller board

Distance between indoor controller board and relay must be within 33 feet.

Multiple remote controller adapter PAC-SA88HA-E

Duct characteristics

1 Curve in the at site right graphs

0	A	C
	B
	Q

2

A

E C

Q

3

D

A

Q

Qa

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>

CN51

Characteristic diagram of air capacity taken from outside of PMFY-P·NBMU-E

	0.2
(in.W.G.)	0.1
	00
pressure									2 intake
	-0.1
									1 intake
Static	-0.2
	-0.3
	-0.4
	0	10	20	30	40	50	60	70		80

Air flow (CFM)

7