Panasonic S-36PU1E5A Service Manual page 275

1-9-2. External Air Intake Volume & Resistance Within Unit / Operation Noise Characteristics (continued)
Ceiling (Type T2)
1-9-2-3. In a Case of External Air Intake to Unit Directly (Using external air intake cylindrical flange)
50
40
Resistance within the unit
(High speed wind)
30
20
10
0
0 50 100
External Air Intake Volume (m
External Air Intake Volume & Resistance Within Unit/
Operation Noise Characteristics
1. Calculate the operation noise when external air is being fed by combining the noise when only external air is being fed as
shown in the diagram for operation noise characteristics and the operation noise of the unit as stipulated in the catalogue.
2. The operation noise conforms to JIS standards and constitute measurements taken in an anechoic chamber 1m front
and 1m below the indoor unit. Under normal circumstances, the diagram shown above is greater owing to the effects of
surrounding noise and reverberation when the unit is actually installed.
The amount of external air intake that is possible to feed when it is fed directly into the unit
Type
Permissible air intake
160
volume (m 3 /h)
* The operation noise for models that use small units is lower, so use values that are within the range shown in the
above table. Using values that exceed these will result in noise when only external air is fed being louder than the
noise emitted from the unit.
150 200 250
3
/h)
36 45 50 60
170 170 200
70
Operation noise
(External air intake only)
60
External air intake cylindrical flange
50
40
Indoor unit
30
20
With the External Air Intake Flange Attached
71 100 125 140
210 240 240 240
1-265
Connection duct: diameter ø100
1