Bryant CK3B manual COIL STATIC PRESSURE DROP In. WC

CFM — Cubic Ft per Minute

EWB — Entering Wet Bulb ( °F)

LWB — Leaving Wet Bulb ( °F)

TC — Total Cooling Capacity 1000 Btuh

SHC — Total Sensible Capacity 1000 Btuh

BF — Bypass Factor

MBH — 1000 Btuh

NOTES:

1.Contact manufacturer for cooling capacities at conditions other than shown in table.

2.Formulas:

3.Direct interpolation is permissible. Do not extrapolate.

4.SHC is based on 80°F db temperature of air entering coil. Below 80°F db, subtract (Correction Factor x CFM) from SHC. Above 80°F db, add (Correction Factor x CFM) to SHC.

5.All data points are based on 10°F superheat leaving coil.

6.Bypass Factor = 0 indicates no psychometric solution. Use bypass factor of next lower EWB for approximation.

	ENTERING AIR DRY BULB TEMPERATURE (°F)
	79	78	77	76	75	Under 75
BYPASS	81	82	83	84	84	Over 85

Leaving db = entering db —

sensible heat cap.

1.09 x CFM

FACTOR			Correction Factor
0.10	0.98	1.96	2.94	3.92	4.91	Use formula
0.20	0.87	1.74	2.62	3.49	4.36
						shown below
0.30	0.76	1.53	2.29	3.05	3.82

Leaving wb = wb corresponding to enthalpy of air leaving coil (hLWB)

total capacity (Btuh)

hLWB = hEWB —

4.5 x CFM

where hEWB = enthalpy of air entering coil.

Interpolation is permissible.

Correction Factor = 1.09 x (1 – BF) x (db – 80)

COIL STATIC PRESSURE DROP (In. WC)

UNIT SIZE	BULB			AIR QUANTITY (CFM)
		600	700	800	900	—	—
A024
	WET	0.08	0.10	0.13	0.16	—	—
	DRY	0.06	0.08	0.11	0.13	—	—
		700	800	900	1000	1100	—
A030
	WET	0.08	0.12	0.15	0.19	0.23	—
	DRY	0.08	0.10	0.14	0.17	0.21	—
		900	1000	1100	1200	1300	—
A036
	WET	0.16	0.19	0.23	0.27	0.32	—
	DRY	0.13	0.17	0.21	0.25	0.29	—
		1000	1100	1200	1300	1400	—
A042
	WET	0.18	0.21	0.24	0.27	0.31	—
	DRY	0.14	0.17	0.20	0.23	0.26	—
		1300	1400	1500	1600	1700	—
A048
	WET	0.19	0.22	0.25	0.28	0.31	—
	DRY	0.18	0.21	0.24	0.27	0.30	—
		1600	1700	1800	1900	2000	2100
A060
	WET	0.19	0.22	0.24	0.26	0.28	0.30
	DRY	0.18	0.20	0.21	0.24	0.26	0.28

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