Thermo Products OD6RA072D48B Speed vs. color code for PSC Motor Low = Orange, High = Black

For PSC systems, the ½ hp motor is equipped with 5 speeds. The unit is set for mid-fire temp rise @ 65ºF. See table for proper blower motor set up:

Speed Tap\	Furnace Airflow (CFM) vs. External Static pressure (in. WC.)
Static Pressure	0.1	0.2	0.3	0.4	0.5	0.6	0.7
Low	930	915	912	910	822	774	730
ML	1155	1152	1130	1126	1085	1042	920
MH	1442	1432	1418	1382	1334	1293	1230
High	1802	1762	1705	1635	1569	1493	1428
	Furnace Motor Current Draw (Amps) vs. External Static pressure (in. WC.)
Low	3.28	3.1	3.02	2.91	2.64	2.49	2.36
ML	4.18	4.02	3.91	3.74	3.59	3.34	2.95
MH	5.44	5.17	4.95	4.72	4.43	4.21	3.95
High	6.61	6.36	6.04	5.73	5.46	5.17	4.9
Speed Tap\	High Fire Temperature Rise vs. External Static pressure (in. WC.)
Static Pressure	0.1	0.2	0.3	0.4	0.5	0.6	0.7
Low	90	91	91	92	101	108	114
ML	72	72	74	74	77	80	91
MH	58	58	59	60	62	64	68
High	46	47	49	51	53	56	58
Speed Tap\	Mid Fire Temperature Rise vs. External Static pressure (in. WC.)
Static Pressure	0.1	0.2	0.3	0.4	0.5	0.6	0.7
Low	72	73	73	73	81	86	91
ML	58	58	59	59	61	64	72
MH	46	47	47	48	50	52	54
High	37	38	39	41	42	45	47
Speed Tap\	Low Fire Temperature Rise vs. External Static pressure (in. WC.)
Static Pressure	0.1	0.2	0.3	0.4	0.5	0.6	0.7
Low	60	61	61	61	68	72	76
ML	48	48	49	49	51	53	60
MH	39	39	39	40	42	43	45
High	31	32	33	34	35	37	39

Figure 19: Heating speed by input

Speed vs. color code for PSC Motor:

Low = Orange

M. Low = Red

Med = Blue

M. High = Yellow

High = Black

31