Greenheck Fan manual GB-500, Maximum Motor Frame Size = 256T

Roof Downblast - Exhaust Belt Drive

GB-500

83

(2108)

*503⁄4	(Pa)
(1289)	Pressure
141⁄2 (368)	Static
13⁄4 (44)

64

(1626)

Damper Size = 54 x 54 (1371 x 1371) Roof Opening = 561/2 x 561/2 (1435 x 1435) Shroud Thickness = 0.100 (2.5)

Motor Cover Thickness = 0.064 (1.6) Curb Cap Thickness = 0.100 (2.5) ^Approximate Unit Weight = 687 lbs. (312 kg)

All dimensions in inches (millimeters).. *May be greater depending on motor. ^Weight shown is largest cataloged Open Drip-Proof motor.

RPM (Belt)

HP

Density 0.075 lb/ft3

Density 1.2 kg/m3

(in.wg)

R

V

E

Pressure

U

C

M

T

E

S

Y

Static

I S

S

T

H

F

O

T

F

E

L

E

H

O

T

T

T

C

E

L

E

S

T

O

N

O

D

Volume (cfm x 1000)

Volume (m3/hr x 1000)

Motor	Fan					Static Pressure in Inches wg
HP	RPM		0	0..125	0..25	0..375	0..5	0..625		0..75		0..875	1	1..25
500
		CFM	14102	11123
	175
		BHP
		Sones	6..7	6..5							MAXIMUM RPM = 460
		CFM	16117	13588	10593
										TIP SPEED (ft/min) = RPM x 14.137
1	200	BHP	0..75	0..85	0..83
									MAXIMUM MOTOR FRAME SIZE = 256T
		Sones	8..4	8..0	7..7
		CFM	17245	14939	12242
	214	BHP	0..92	1..04	1..04
		Sones	9..5	9..1	8..7
		CFM	19743	17749	15481	12983
11⁄2	245	BHP	1..38	1..54	1..57	1..53
		Sones	11..9	11..5	11..0	10..7
		CFM	21677	19873	17857	15752
2	269	BHP	1..83	2..02	2..06	2..08
		Sones	14..0	13..8	13..2	12..7
		CFM	24820	23263	21627	19752	17903	15284
3	308	BHP	2..74	3..00	3..09	3..11	3..11	2..96
		Sones	17..7	17..4	16..9	16..2	15..8	15..6
		CFM	27157	25739	24253	22614	20937	19206			16671
	337	BHP	3..59	3..89	4..01	4..06	4..08	4..06			3..88
5		Sones	19..9	19..5	19..1	18..5	17..9	17..6			17..4
		CFM	29494	28188	26834	25429	23831	22310			20688	18366
	366	BHP	4..60	4..92	5..10	5..20	5..20	5..24			5..19	4..99
		Sones	22	22	21	21	20	19..8			19..5	19..4
		CFM	33764	32624	31467	30265	29015	27607			26276	24940	23486
71⁄2	419	BHP	6..90	7..27	7..57	7..70	7..80	7..80			7..84	7..88	7..78
		Sones	27	27	27	26	26	25			24	24	23
		CFM	35457	34371	33279	32134	30989	29679			28373	27107	25801	22407
	440	BHP	8..00	8..38	8..74	8..87	9..01	9..03			9..05	9..10	9..09	8..73
10		Sones	30	29	29	29	29	28			27	26	26	25
		CFM	37068	36030	34991	33900	32805	31625			30342	29127	27917	25310
	460	BHP	9..14	9..54	9..94	10..10	10..24	10..32			10..32	10..36	10..41	10..26
		Sones	32	32	32	32	32	31			30	29	28	27

Performance certified is for installation type A: Free inlet, Free outlet. Power rating (BHP) does not include transmission losses. Performance ratings include the effects of a birdscreen. The sound ratings shown are loudness values in hemispherical sones at 5 ft. (1.5 m) in a hemispherical free field calculated per AMCA Standard 301. Values shown are for installation type A: free inlet hemispherical sone levels.

45