Sound Levels - York YKCA-YKHA 18 Service Manual

9. Sound Levels

FOUR-WAY CASSETTE TYPE
High speed airflow
Medium speed airflow
Low speed airflow
Model
YKCA-YKHA 18
YKCA-YKHA 24
YKCA-YKHA 36
YKCA-YKHA 48
18000btu/h
Audibility limits of
continuous white
sound
Octave band center frequency
1.0m
Microphone
Noise level under three speeds of fan
H
43
43
46
46
24000btu/h
Hz
*
M
41
41
44
44
+
L
38
38
41
41
36000btu/h 48000btu/h
Audibility limits of
continuous white
sound
Octave band center frequency * Hz +