Bryant 551A operation manual Fan RPM at Motor Pulley Settings, Evaporator Fan Motor Specifications

Table 14 — Perfect Humidity™ Dehumidification

Package Static Pressure Drop (in. wg)

UNIT SIZE	UNIT NOMINAL	CFM PER TON
551A	TONS	300	400	500
155	12	.026	.045	.071
180	15	.040	.071	.111
240	20	.071	.126	.197

Table 15 — Fan RPM at Motor Pulley Settings*

551A	0	0.5	1	11/	2	2	21/	2	3	31/	2	4	41/	5	51/	2	6
													2
155†	††	††	††	††		1064	1035		1006	978		949	920	891	863		834
155**	††	††	††	††		1426	1393		1360	1327		1294	1261	1227	1194		1161
180†	††	††	††	††		1021	1002		984	965		947	928	910	891		873
180**	††	††	††	††		1200	1178		1156	1134		1112	1091	1069	1047		1025
240†	††	††	††	††		1151	1132		1114	1095		1077	1058	1040	1021		1002
240**	††	††	††	††		1369	1347		1325	1303		1281	1259	1237	1215		1193

*Approximate fan rpm shown.

†Indicates standard drive package. **Indicates alternate drive package.

††Due to belt and pulley style, pulley cannot be set to this number of turns open.

Table 16 — Evaporator Fan Motor Specifications

UNIT	NOMINAL	VOLTAGE	MAX	EFF.	MAX	MAX	MAX
551A	HP		WATTS	%	BHP	BkW	AMPS
155	2.9	208	2700	85.8	3.13	2.34	9.46
(Standard	2.9	230	2700	85.8	3.13	2.34	8.6
Motor)	2.9	460	2700	85.8	3.13	2.34	4.3
155	3.7	208	3775	85.8	4.38	3.27	10.5
(Optional	3.7	230	3775	85.8	4.38	3.27	10.5
Motor)	3.7	460	3775	85.8	4.38	3.27	4.8
180	5	208	5180	87.5	6.13	4.57	15.8
	5	230	5180	87.5	6.13	4.57	15.8
	5	460	5180	87.5	6.13	4.57	7.9
240	7.5	208	7915	88.5	9.47	7.06	22
	7.5	230	8640	88.5	10.33	7.71	22
	7.5	460	8640	88.5	10.33	7.71	13

LEGEND

BHP — Brake Horsepower

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