Trane BCXC-SVX01B-EN, BCHC manual Belt tension, BCBH/BCVC valve package waterflow limits

Maintenance

NOTICE

Belt tension!

Do not over-tension belts. Excessive belt tension will reduce fan and motor bearing life, accelerate belt wear, and could result in shaft failure.

Table 32. BCHC/BCVC fan, filter, and mixing box general data

Unit size	12	18	24	36	54	72	90
Nominal cfm	400	600	800	1200	1800	2400	3000
Air flow
Minimum cfm	250	375	500	750	1125	1500	1875
Maximum cfm	500	675	1000	1600	2400	3000	4000
Fan data
Fan wheel, in. (dia. x width)	9.5 x 4.5	9.5 x 4.5	9.5 x 9.5	9.5 x 9.5	12.6 x 9.5	12.6 x 9.5	12.6 x 9.5
Maximum rpm	2300	2300	1800	1800	1500	1500	1500
Motor hp	0.33–1.0	0.33–1.0	0.33–1.0	0.33–1.5	0.33–2.0	0.33–3.0	0.33–3.0
Unit flat filter
Qty. - size, in.	1 - 12 x 24 1 - 12 x 24 1 - 16 x 25 2 - 16 x 20 2 - 20 x 20 1 - 20 x 20 3 - 16 x 25
						1 - 20 x 25
Area, sq. ft	2.000	2.000	2.778	4.444	5.556	6.250	8.333
Velocity, ft/min.	200	300	288	270	324	384	360
Angle filter
Qty. - size, in.	2 - 12 x 24 2 - 12 x 24 2 - 12 x 24 2 - 20 x 20 4 - 16 x 20 4 - 16 x 20 4 - 20 x 20
Area, sq. ft	4.000	4.000	4.000	5.556	8.889	8.889	11.111
Velocity, ft/min.	100	150	200	216	203	270	270
Bottom / top access filter box
Qty. - size, in.	1 - 12 x 20 1 - 12 x 24 1 - 16 x 25 1 - 16 x 20 1 - 16 x 20 1 - 20 x 25 2 - 16 x 25
				1 - 16 x 16 1 - 20 x 20 1 - 20 x 20 1 - 14 x 25
Area, sq. ft	1.700	2.000	2.800	4.000	5.000	6.300	8.000
Velocity, ft/min.	240	300	288	300	360	384	375
Mixing box
Damper opening width, in.	15.5	19.5	19.5	31.5	31.5	31.5	31.5
Damper opening height, in.	7	7	7	7	12.75	12.75	12.75
Area, sq. ft	0.753	0.948	0.948	1.531	2.789	2.789	2.789
Velocity, ft/min.	531	633	844	784	645	861	1076

Note: Minimum air flow limits apply to units with hot water or electric heat only. There is no minimum airflow limit on cooling on units. Maximum airflow limits are to help prevent moisture carryover.

Table 33. BCBH/BCVC valve package waterflow limits

Tube size (in.)	gpm
1/2	8.6
3/4	19.3
1	34.3
1-1/4	53.5

BCXC-SVX01B-EN 65