York Y34, Y33, Y32 manual Unit Cornerweight, Indoor Sound Power Rating, Attenuation Factors

246653-YTG-E-0108

TABLE 61: UNIT CORNERWEIGHT

UNIT		25 TON				30 TON				40 TON
DESCRIPTION
	A	B	C	D	A	B	C	D	A	B	C	D
BASIC UNIT	870	949	1352	1239	930	972	1360	1303	969	969	1454	1454
BASIC UNIT WITH	1018	1111	1313	1203	1076	1124	1328	1272	1058	1058	1482	1482
ECONOMIZER
BASIC UNIT WITH
ECONOMIZER AND	994	1084	1418	1300	1073	1073	1403	1403	1102	1055	1503	1570
GAS OR ELECTRIC
HEAT
BASIC UNIT WITH
ECONOMIZER AND
GAS OR ELECTRIC	1220	1275	1318	1262	1275	1275	1410	1410	1335	1278	1485	1551
HEAT AND POWER
EXHAUST

NOTES:Basic Unit = cooling only, 10hp FC fan.

+Econ = +235lb

+Heat = single stage gas, 180 lb

+Power Exhaust = modulating 7.5hp

TABLE 62: INDOOR SOUND POWER RATING

		ESP	BLOWER					SOUND POWER (DB 10-12 WATTS)
MODEL NUMBER	CFM					OCTAVE BAND CENTERLINE FREQUENCY (HZ)								DBA
		IWG	RPM	BHP	63	125	250		500	1000	2000	4000	8000
Y32	10,000	1.5	750	7.5	90	88	85		85	80	78	74	68	87
Y33	12750	1.5	840	12.8	93	91	88		88	83	81	77	71	90
Y34	17500	1.3	800	20	95	92	89		89	84	83	78	72	91

Sound Power Ratings for Supply Air Blowers in our Millen- nium Units with High Gas Heat, Economizer, 2: T/A Filters and Wet DX Sound power calculations complements of Lau’s revised “Whirlwind” application selection software for air mov- ing components.

The sound ratings above occur at the blower wheel. To deter- mine the sound rating at a unit’s supply and return air duct connection, subtract the attenuation factors listed below.

TABLE 63: ATTENUATION FACTORS

			OCTAVE BAND CENTERLINE FREQUENCY (HZ)
LOCATION	63	125	250		500	1000	2000	4000	8000
				S	OUND ATTENUATION (DB12 WATTS)
SUPPLY AIR	11	13	18		10	21	21	23	23
RETURN AIR	13	15	22		23	25	25	29	29

TABLE 64: OUTDOOR SOUND POWER RATING

				OCTAVE BAND CENTERLINE FREQUENCY (HERTZ)
MODEL	65	125	250		500	1000	2000	4000	8000	db(A)
					SOUND POWER	LEVEL, DB (10)-	12 WATTS
Y32	88	91	89		86	82	79	76	72	88
Y33	87	90	88		86	82	80	77	73	88
Y34	88	91	89		86	82	80	77	73	88

NOTE: These values have been accessed using a model of sound propagation from a point source into the hemispheric free field (AMCA 303-79). The dBA val- ues provided are to be used for reference only. Cal- culation of dBA values cover matters of system design, and the fan manufacturer has no way of knowing the details of each system. This constitutes an exception to any specification or guarantee requiring a dBA value or sound data in any other form than sound power level ratings.

Johnson Controls Unitary Products 79