Mitsubishi Electronics PEAD-A24AA, PEAD-A42AA, PEAD-A36AA, PEAD-A30AA User Manual
SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP
AIR CONDITIONERS
2009
Series PEAD
<indoor unit> Service ref.
Models
PEAD-A24AA
PEAD-A30AA
PEAD-A36AA
PEAD-A42AA
INDOOR UNIT
R410A
NOTE:
• This manual describes only
service data of the indoor
units.
CONTENTS
1. SAFETY PRECAUTION ····························· 2
2. PART NAMES AND FUNCTIONS ·············· 3
3. SPECIFICATION ········································ 5
4. FAN PERFORMANCE AND
CORRECTED AIR FLOW ·························· 7
5. SOUND PRESSURE LEVELS ···················12
6. OUTLINES & DIMENSIONS ······················16
7. WIRING DIAGRAM ····································17
8. REFRIGERANT SYSTEM DIAGRAM ········18
9. HEATER CONTROL ··································18
10
. TROUBLESHOOTING ·······························21
11
. DISASSEMBLY PROCEDURE ··················35
TEMP.
REMOTE CONTROLLER
ON/OFF
TM
1
SAFETY PRECAUTION
1-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply
circuits must be disconnected.
1-2. CAUTIONS RELATED TO NEW REFRIGERANT
Cautions for units utilising refrigerant R410A
Use new refrigerant pipes.
In case of using the existing pipes for R22, be careful with
the followings.
· For A36 and A42, be sure to perform replacement oper-
ation before test run.
· Change flare nut to the one provided with this product.
Use a newly flared pipe.
· Avoid using thin pipes.
Make sure that the inside and outside of refrigerant piping is clean and it has no contamination
such as sulfur hazardous for use, oxides, dirt,
shaving particles, etc.
In addition, use pipes with specified thickness.
Contamination inside refrigerant piping can cause deterioration of refrigerant oil etc.
Store the piping to be used indoors during
installation and both ends of the piping sealed
until just before brazing. (Leave elbow joints, etc.
in their packaging.)
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of compressor.
Do not use refrigerant other than R410A.
If other refrigerant (R22 etc.) is used, chlorine in refrigerant can cause deterioration of refrigerant oil etc.
Use a vacuum pump with a reverse flow check
valve.
Vacuum pump oil may flow back into refrigerant cycle and
that can cause deterioration of refrigerant oil etc.
Use the following tools specifically designed for
use with R410A refrigerant.
The following tools are necessary to use R410A refrigerant.
Tools for R410A
Gauge manifold
Charge hose
Gas leak detector
Torque wrench
Flare tool
Size adjustment gauge
Vacuum pump adaptor
Electronic refrigerant
charging scale
Handle tools with care.
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of compressor.
Use ester oil, ether oil or alkylbenzene oil (small
amount) as the refrigerant oil applied to flares
and flange connections.
If large amount of mineral oil enters, that can cause deterioration of refrigerant oil etc.
Do not use a charging cylinder.
If a charging cylinder is used, the composition of refrigerant will change and the efficiency will be lowered.
Ventilate the room if refrigerant leaks during
Charge refrigerant from liquid phase of gas
cylinder.
If the refrigerant is charged from gas phase, composition
change may occur in refrigerant and the efficiency will be
lowered.
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
[1] Cautions for service
(1) Perform service after recovering the refrigerant left in unit completely.
(2) Do not release refrigerant in the air.
(3) After completing service, charge the cycle with specified amount of refrigerant.
(4) When performing service, install a filter drier simultaneously.
Be sure to use a filter drier for new refrigerant.
[2] Additional refrigerant charge
When charging directly from cylinder
· Check that cylinder for R410A on the market is syphon type.
· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
2
Gravimeter
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No. Tool name Specifications
1 Gauge manifold
2 Charge hose
3 Electronic scale
4 Gas leak detector
5 Adaptor for reverse flow check
6 Refrigerant charge base
7 Refrigerant cylinder
8 Refrigerant recovery equipment
· Only for R410A
· Use the existing fitting specifications. (UNF1/2)
· Use high-tension side pressure of 5.3MPa·G or over.
· Only for R410A
· Use pressure performance of 5.09MPa·G or over.
· Use the detector for R134a, R407C or R410A.
· Attach on vacuum pump.
· Only for R410A · Top of cylinder (Pink)
· Cylinder with syphon
Unit
2
Indoor Unit
•
Air intake (sucks the
air inside the room
into the unit)
PART NAMES AND FUNCTIONS
In case of rear inlet
Air outlet
In case of bottom inlet
3
Wired remote controller
Display Section
For purposes of this explanation,
all parts of the display are shown
as lit. During actual operation, only
the relevant items will be lit.
Identifies the current operation
Shows the operating mode, etc.
*Multilanguage display is available.
“Centrally Controlled” indicator
Indicates that operation from the
remote controller has been prohibited by a master controller.
“Timer is Off” indicator
Indicates that the timer is off.
Temperature Setting
Shows the target temperature.
Day-of-Week
Shows the current day of the week.
Time/Timer Display
Shows the current time, unless the simple or Auto Off
timer is set.
If the simple or Auto Off timer is set, the time to be
switched off is shown.
TIME SUN MON TUE WED THU FRI SAT
TIMER
AFTER
ERROR CODE
°F°C
Hr
AFTER
°F°C
ONLY1Hr.
Up/Down Air Direction indicator
The indicator shows the direction of the outcoming airflow.
“One Hour Only” indicator
Displayed if the airflow is set to
low or downward during COOL
or DRY mode. (Operation varies
according to model.)
The indicator goes off in 1 hour,
when the airflow direction
also changes.
Room Temperature display
Shows the room temperature. The room
temperature display range is 8–39
The display blinks if the temperature
is less than 8
Louver display
Indicates the action of the swing louver.
Does not appear if the louver is not
running.
(Power On indicator)
Indicates that the power is on.
ON
OFF
FUNCTION
FILTER
WEEKLY
SIMPLE
AUTO OFF
˚C or 39˚C or more.
“Sensor” indication
Displayed when the remote controller
sensor is used.
“Locked” indicator
Indicates that remote controller buttons have been locked.
“Clean The Filter” indicator
To be displayed on when it is time to
clean the filter.
Timer indicators
The indicator comes on if the corresponding timer is set.
Fan Speed indicator
Shows the selected fan speed.
Ventilation indicator
Appears when the unit is running in
˚C.
Ventilation mode.
Operation Section
Temperature setting buttons
Down
Up
Timer Menu button
(Monitor/Set button)
Mode button (Return button)
TEMP.
ON/OFF
Set Time buttons
Back
Ahead
Timer On/Off button
(Set Day button)
Opening the
lid
BACK DAY
PAR-21MAA
MENU
MONITOR/SET
CLOCK
ON/OFF
OPERATION
FILTER
CHECK
CLEAR
TEST
Built-in temperature sensor
Note:
“PLEASE WAIT” message
This message is displayed for approximately 3 minutes when power is supplied to the indoor unit or when the unit is recovering from a power failure.
“NOT AVAILABLE” message
This message is displayed if an invalid button is pressed (to operate a function that the indoor unit does not have).
If a single remote controller is used to operate multiple indoor units simultaneously that are different types, this message will not be displayed as
far as any of the indoor units is equipped with the function.
ON/OFF button
Fan Speed button
Filter button
(<Enter> button)
Test Run button
Check button (Clear button)
Airflow Up/Down button
Louver button
( Operation button)
To return operation
number
Ventilation button
( Operation button)
To go to next operation
number
4
Service Ref.
Power supply (phase, cycle, voltage)
Max. Fuse Size
Min. Circuit Ampacity A
A
External finish
Heat exchanger
Fan
Fan (drive) × No.
F
Fan motor
an motor output kW
F.L.A
Airflow (Low-Mid-High)
m
3
/min (CFM)
External static pressure Pa (in.WG)
Operation control & Thermostat
Sound pressure level
(Low-Mid-High)
dB (A)
Field drain pipe O.D mm (in.)
Dimensions W mm (in.)
D mm (in.)
H mm (in.)
kg (lbs)
INDOOR UNIT
Weight
35Pa (0.14 in.WG)
50Pa (0.20 in.WG)
70Pa (0.28 in.WG)
100Pa (0.40 in.WG)
150Pa (0.60in.WG)
Service Ref.
Power supply (phase, cycle, voltage)
Max. Fuse Size
Min. Circuit Ampacity A
A
External finish
Heat exchanger
Fan
Fan (drive) × No.
F
Fan motor
an motor output kW
F.L.A
Airflow (Low-Mid-High)
m
3
/min (CFM)
External static pressure Pa (in.WG)
Operation control & Thermostat
Sound pressure level
(Low-Mid-High)
dB (A)
Field drain pipe O.D mm (in.)
Dimensions W mm (in.)
D mm (in.)
H mm (in.)
kg (lbs)
INDOOR UNIT
Weight
35Pa (0.14 in.WG)
50Pa (0.20 in.WG)
70Pa (0.28 in.WG)
100Pa (0.40 in.WG)
150Pa (0.60in.WG)
Service Ref.
Power supply (phase, cycle, voltage)
Max. Fuse Size
Min. Circuit Ampacity A
A
External finish
Heat exchanger
Fan
Fan (drive) × No.
F
Fan motor
an motor output kW
F.L.A
Airflow (Low-Mid-High)
m
3
/min (CFM)
External static pressure Pa (in.WG)
Operation control & Thermostat
Sound pressure level
(Low-Mid-High)
dB (A)
Field drain pipe O.D mm (in.)
Dimensions W mm (in.)
D mm (in.)
H mm (in.)
kg (lbs)
INDOOR UNIT
Weight
35Pa (0.14 in.WG)
50Pa (0.20 in.WG)
70Pa (0.28 in.WG)
100Pa (0.40 in.WG)
150Pa (0.60in.WG)
PEAD-A24AA
1 phase, 60Hz, 208/230V
15
2.63
1 phase, 60Hz, 208/230V
15
2.73
1 phase, 60Hz, 208/230V
15
3.30
Galvanized sheets
Plate fin coil
Sirocco fan
× 2
0.121
2.10
14.5-18.0-21.0 (512-636-742)
35-50-70-100-150 (0.14-0.20-0.28-0.40-0.60)
Remote controller & built-in
25-28-32
25-29-33
26-30-34
27-31-35
29-34-38
32 (1-1/4)
1100 (43-5/16)
732 (28-7/8)
250 (9-7/8)
33 (73)
PEAD-A30AA
PEAD-A36AA
Galvanized sheets
Plate fin coil
Sirocco fan × 2
0.121
2.18
17.5-21.0-25.0 (618-742-883)
35-50-70-100-150 (0.14-0.20-0.28-0.40-0.60)
Remote controller & built-in
25-29-34
26-30-34
27-31-35
28-32-36
30-35-39
32 (1-1/4)
1100 (43-5/16)
732 (28-7/8)
250 (9-7/8)
33 (73)
Galvanized sheets
Plate fin coil
Sirocco fan
× 2
0.244
2.64
24.0-29.0-34.0 (847-1024-1201)
35-50-70-100-150 (0.14-0.20-0.28-0.40-0.60)
Remote controller & built-in
28-33-38
29-34-38
30-35-39
31-36-40
34-40-43
32 (1-1/4)
1400 (55-1/8)
732 (28-7/8)
250 (9-7/8)
41 (91)
3
SPECIFICATION
5
Service Ref.
Power supply (phase, cycle, voltage)
Max. Fuse Size
Min. Circuit Ampacity A
A
External finish
Heat exchanger
Fan
Fan (drive) × No.
F
Fan motor
an motor output kW
F.L.A
Airflow (Low-Mid-High)
m
3
/min (CFM)
External static pressure Pa (in.WG)
Operation control & Thermostat
Sound pressure level
(Low-Mid-High)
dB (A)
Field drain pipe O.D mm (in.)
Dimensions W mm (in.)
D mm (in.)
H mm (in.)
kg (lbs)
INDOOR UNIT
Weight
35Pa (0.14 in.WG)
50Pa (0.20 in.WG)
70Pa (0.28 in.WG)
100Pa (0.40 in.WG)
150Pa (0.60in.WG)
PEAD-A42AA
1 phase, 60Hz, 208/230V
15
3.50
Galvanized sheets
Plate fin coil
Sirocco fan
× 2
0.244
2.80
29.5-35.5-42.0 (1042-4254-1483)
35-50-70-100-150 (0.14-0.20-0.28-0.40-0.60)
Remote controller & built-in
31-36-40
33-36-40
33-37-41
34-39-42
37-41-45
32 (1-1/4)
1400 (55-1/8)
732 (28-7/8)
250 (9-7/8)
43 (95)
6
4
FAN PERFORMANCE AND CORRECTED AIR FLOW
PEAD-A24AA
(External static pressure 35Pa) 208-230V 60Hz
60
[0.241]
50
[0.201]
Limit
40
[0.161]
Rated point
30
[0.120]
20
[0.080]
External static pressure (Pa)[in.WG]
10
[0.040]
0
[0]
10
[353]
PEAD-A24AA
(External static pressure 50Pa) 208-230V 60Hz
70
[0.281]
60
[0.241]
50
[0.201]
Limit
[530]
15
Airflow rate (m
Low
[706]
20
Middle
3
/min)[cfm]
Rated point
High
[883]
PEAD-A24AA
(External static pressure 100Pa) 208-230V 60Hz
150
[0.602]
[0.401]
Limit
100
Rated point
High
Middle
50
[0.201]
External static pressure (Pa)[in.WG]
Low
0
25
30
[1059]
[0]
10
[353]
PEAD-A24AA
(External static pressure 150Pa) 208-230V 60Hz
200
[0.803]
150
[0.602]
15
[530]
Limit
[706]
Airflow rate (m
20
3
/min)[cfm]
Rated point
[883]
25
30
[1059]
High
40
[0.161]
30
[0.120]
External static pressure (Pa)[in.WG]
20
[0.080]
10
[0.040]
0
[0]
10
[353]
PEAD-A24AA
(External static pressure 70Pa) 208-230V 60Hz
90
[0.361]
80
[0.321]
70
[0.281]
[0.241]
[0.201]
[0.161]
[0.120]
External static pressure (Pa)[in.WG]
[0.080]
[0.040]
60
50
40
30
20
10
0
[0]
[353]
Limit
10
[530]
[530]
Low
15
Airflow rate (m
15
Airflow rate (m
[706]
Low
[706]
20
20
3
/min)[cfm]
3
/min)[cfm]
Middle
Rated point
Middle
High
[883]
[883]
25
High
25
30
[1059]
30
[1059]
[0.401]
External static pressure (Pa)[in.WG]
[0.201]
100
Middle
50
Low
0
[0]
[353]
10
15
[530]
[706]
Airflow rate (m
20
3
/min)[cfm]
[883]
25
30
[1059]
7
PEAD-A30AA
(External static pressure 35Pa) 208-230V 60Hz
70
[0.281]
60
[0.241]
[0.201]
[0.161]
[0.120]
External static pressure (Pa)[in.WG]
[0.080]
[0.040]
50
40
30
20
10
0
[0]
10
[353]
Limit
[530]
Middle
Low
15
[706]
Airflow rate (m
20
3
/min)[cfm]
High
[883]
25
Rated point
PEAD-A30AA
(External static pressure 100Pa) 208-230V 60Hz
150
[0.602]
Limit
100
[0.401]
50
[0.201]
External static pressure (Pa)[in.WG]
0
[0]
30
[1059]
[353]
10
15
[530]
Low
[706]
Airflow rate (m
20
Middle
3
/min)[cfm]
High
Rated point
25
[883]
30
[1059]
PEAD-A30AA
(External static pressure 50Pa) 208-230V 60Hz
90
[0.361]
80
[0.321]
70
[0.281]
60
[0.241]
50
[0.201]
40
[0.161]
30
[0.120]
External static pressure (Pa)[in.WG]
20
[0.080]
10
[0.040]
0
[0]
10
[353]
PEAD-A30AA
(External static pressure 70Pa) 208-230V 60Hz
100
[0.401]
90
[0.361]
80
[0.321]
70
[0.281]
60
[0.241]
50
[0.201]
40
[0.161]
30
External static pressure (Pa)[in.WG]
[0.120]
20
[0.080]
10
[0.040]
0
[0]
10
[353]
Limit
Limit
15
[530]
15
[530]
Middle
Low
[706]
Airflow rate (m
Middle
Low
[706]
Airflow rate (m
20
20
3
/min)[cfm]
3
/min)[cfm]
High
High
Rated point
25
[883]
25
[883]
Rated point
PEAD-A30AA
(External static pressure 150Pa) 208-230V 60Hz
200
[0.803]
150
30
[1059]
30
[1059]
[0.602]
[0.401]
External static pressure (Pa)[in.WG]
[0.201]
100
50
0
[0]
10
[353]
Limit
[530]
15
[706]
Airflow rate (m
20
Middle
Low
3
/min)[cfm]
High
Rated point
25
[883]
30
[1059]
8
PEAD-A36AA
(External static pressure 35Pa) 208-230V 60Hz
70
[0.281]
Limit
60
[0.241]
50
[0.201]
40
[0.161]
30
[0.120]
3
/min)[cfm]
Middle
External static pressure (Pa)[in.WG]
20
[0.080]
10
[0.040]
0
[0]
10
[353]15[530]20[706]25[883]30[1059]35[1236]40[1412]45[1589]
Low
Airflow rate (m
Rated point
High
PEAD-A36AA
(External static pressure 100Pa) 208-230V 60Hz
150
[0.602]
Limit
High
100
[0.401]
Middle
50
[0.201]
External static pressure (Pa)[in.WG]
0
[0]
10
[353]15[530]20[706]25[883]30[1059]35[1236]40[1412]45[1589]
Low
Airflow rate (m
3
/min)[cfm]
Rated point
PEAD-A36AA
(External static pressure 50Pa) 208-230V 60Hz
100
[0.401]
90
[0.361]
80
[0.321]
70
[0.281]
60
[0.241]
50
[0.201]
40
[0.161]
30
External static pressure (Pa)[in.WG]
[0.120]
20
[0.080]
10
[0.040]
[0]
PEAD-A36AA
(External static pressure 70Pa) 208-230V 60Hz
150
[0.602]
Limit
High
Middle
Low
0
10
[353]15[530]20[706]25[883]30[1059]35[1236]40[1412]45[1589]
Airflow rate (m
3
/min)[cfm]
Limit
Rated point
PEAD-A36AA
(External static pressure 150Pa) 208-230V 60Hz
200
[0.803]
High
150
[0.602]
Limit
Middle
100
[0.401]
Low
External static pressure (Pa)[in.WG]
50
[0.201]
0
[0]
10
[353]15[530]20[706]25[883]30[1059]35[1236]40[1412]45[1589]
Airflow rate (m
3
/min)[cfm]
Rated point
100
[0.401]
High
Middle
50
[0.201]
External static pressure (Pa)[in.WG]
0
[0]
10
[353]15[530]20[706]25[883]30[1059]35[1236]40[1412]45[1589]
Low
Airflow rate (m
3
/min)[cfm]
Rated point
9
PEAD-A42AA
(External static pressure 35Pa) 208-230V 60Hz
70
[0.281]
Limit
60
[0.241]
Middle
3
/min)[cfm]
[0.201]
[0.161]
[0.120]
External static pressure (Pa)[in.WG]
[0.080]
[0.040]
50
40
30
20
10
0
[0]
15
[530]20[706]
Low
25
[883]30[1059]35[1236]40[1412]45[1589]
Airflow rate (m
High
Rated point
PEAD-A42AA
(External static pressure 100Pa) 208-230V 60Hz
200
[0.803]
Limit
150
[0.602]
[0.401]
External static pressure (Pa)[in.WG]
[0.201]
100
50
0
[0]
15
[530]
20
[706]25[883]30[1059]35[1236]40[1412]45[1589]
Middle
Low
3
Airflow rate (m
Airflow rate (m3/min)[cfm]
/min)[cfm]
High
Rated point
PEAD-A42AA
(External static pressure 50Pa) 208-230V 60Hz
100
[0.401]
90
[0.361]
80
[0.321]
70
[0.281]
60
[0.241]
50
[0.201]
40
[0.161]
30
External static pressure (Pa)[in.WG]
[0.120]
20
[0.080]
10
[0.040]
0
[0]
[530]20[706]
PEAD-A42AA
(External static pressure 70Pa) 208-230V 60Hz
150
[0.602]
Limit
Middle
Low
15
25
[883]30[1059]35[1236]40[1412]45[1589]
3
Airflow rate (m
Airflow rate (m3/min)[cfm]
/min)[cfm]
Limit
100
[0.401]
Middle
High
High
Rated point
Rated point
PEAD-A42AA
(External static pressure 150Pa) 208-230V 60Hz
250
[1.004]
[0.803]
[0.602]
[0.401]
External static pressure (Pa)[in.WG]
[0.201]
200
150
100
Limit
Low
50
0
[0]
15
[530]
20
[706]25[883]30[1059]35[1236]40[1412]45[1589]
Airflow rate (m
Airflow rate (m
Middle
3
3/min)[cfm]
/min)[cfm]
High
Rated point
[0.201]
External static pressure (Pa)[in.WG]
50
0
[0]
15
[530]20[706]
Low
25
[883]30[1059]35[1236]40[1412]45[1589]
Airflow rate (m
3/min)[cfm]
Airflow rate (m3/min)[cfm]
10
PEAD-A24, 30, 36,42AA
Air filter 208-230V 60Hz
15
[0.060]
10
[0.040]
5
[0.020]
External static pressure (Pa)[in.WG]
0
[0]
0
[0]
[353]
10
Airflow rate (m
[706]
A36,42
A24,30
20
3
/min)[cfm]
30
[1059]
40
[1412]
11
5
SOUND PRESSURE LEVELS
5-1. Sound pressure level
Ceiling concealed
5-2. NC curves
PEAD-A24AA
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
Approximate minimum
10.0
audible limit on
continuous noise
5.0
0.0
63 125 250 500 1k 2k 4k 8k
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
Approximate minimum
10.0
audible limit on
continuous noise
5.0
0.0
63 125 250 500 1k 2k 4k 8k
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
Approximate minimum
10.0
audible limit on
continuous noise
5.0
0.0
63 125 250 500 1k 2k 4k 8k
External static pressure 0.14 [in.WG] (35Pa) External static pressure 0.40 [in.WG] (100Pa)
Octave band center frequencies (Hz)
External static pressure 0.20 [in.WG] (50Pa)
Octave band center frequencies (Hz)
External static pressure 0.28 [in.WG] (70Pa)
Octave band center frequencies (Hz)
2m
Aux. duct
test unit
1.5m
Measurement location
High
Low
Middle
High
Low
Middle
High
Low
Middle
NC-60
NC-50
NC-40
NC-30
NC-20
NC-60
NC-50
NC-40
NC-30
NC-20
NC-60
NC-50
NC-40
NC-30
NC-20
1m
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
Approximate minimum
10.0
audible limit on
continuous noise
5.0
0.0
63 125 250 500 1k 2k 4k 8k
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
Approximate minimum
10.0
audible limit on
continuous noise
5.0
0.0
63 125 250 500 1k 2k 4k 8k
Octave band center frequencies (Hz)
External static pressure 0.60 [in.WG] (150Pa)
Octave band center frequencies (Hz)
High
Middle
High
Middle
Low
NC-60
NC-50
NC-40
NC-30
NC-20
Low
NC-60
NC-50
NC-40
NC-30
NC-20
12
PEAD-A30AA
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
Approximate minimum
10.0
audible limit on
continuous noise
5.0
0.0
63 125 250 500 1k 2k 4k 8k
External static pressure 0.14 [in.WG] (35Pa) External static pressure 0.40 [in.WG] (100Pa)
High
Middle
Octave band center frequencies (Hz)
Low
NC-60
NC-50
NC-40
NC-30
NC-20
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
Approximate minimum
10.0
audible limit on
continuous noise
5.0
0.0
63 125 250 500 1k 2k 4k 8k
Octave band center frequencies (Hz)
High
Middle
Low
NC-60
NC-50
NC-40
NC-30
NC-20
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
Approximate minimum
10.0
audible limit on
continuous noise
5.0
0.0
63 125 250 500 1k 2k 4k 8k
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
Approximate minimum
10.0
audible limit on
continuous noise
5.0
0.0
63 125 250 500 1k 2k 4k 8k
External static pressure 0.20 [in.WG] (50Pa)
High
Middle
Octave band center frequencies (Hz)
Low
External static pressure 0.28 [in.WG] (70Pa)
High
Middle
Octave band center frequencies (Hz)
Low
NC-60
NC-50
NC-40
NC-30
NC-20
NC-60
NC-50
NC-40
NC-30
NC-20
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
Approximate minimum
10.0
audible limit on
continuous noise
5.0
0.0
63 125 250 500 1k 2k 4k 8k
External static pressure 0.60 [in.WG] (150Pa)
High
Middle
Octave band center frequencies (Hz)
Low
NC-60
NC-50
NC-40
NC-30
NC-20
13
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