Heatcraft Refrigeration Products HCS manual Coil Performance- Direct Expansion MBH/SQ FT

Coil Performance- Direct Expansion MBH/SQ FT

Table 17

Wet Evaporator Capacity

1/2" and 5/8" tube, entering air 80°F. DB, 67°F. WB

Type A and Type 5, direct expansion at 40ºF. evaporating, cooling capacities

MBH per SQ FT of coil face area

		FPM, Type A Coils (1/2" DIA.)					FPM, Type 5 Coils (5/8" DIA.)
Rows	FPI	400	450	500	550	600	400	450	500	550	600
	6	11.3	12.1	12.8	13.4	14.0	13.1	13.8	14.5	15.2	15.8
	8	13.0	13.9	14.7	15.4	16.1	14.9	15.8	16.6	17.4	18.1
3	10	14.4	15.3	16.2	17.0	17.8	16.2	17.2	18.2	19.0	19.8
	12	15.4	16.5	17.4	18.3	19.1	17.3	18.4	19.4	20.3	21.2
	14	16.3	17.4	18.4	19.3	20.2	18.0	19.2	20.4	21.4	22.4
	6	14.0	15.0	16.0	16.9	17.7	15.8	16.8	17.8	18.7	19.5
	8	15.9	17.1	18.2	19.2	20.1	17.7	18.9	20.0	21.0	22.0
4	10	17.4	18.7	19.8	20.9	22.0	19.0	20.4	21.7	22.8	23.9
	12	18.5	19.9	21.2	22.3	23.4	19.9	21.4	22.8	24.1	25.3
	14	19.4	20.9	22.2	23.5	24.6	20.7	22.3	23.8	25.2	26.5
	6	15.9	17.1	18.3	19.3	20.3	17.9	19.2	20.5	21.6	22.6
	8	18.3	19.7	21.1	22.3	23.5	19.8	21.3	22.7	24.0	25.2
5	10	19.8	21.3	22.8	24.2	25.5	21.0	22.7	24.3	25.7	27.1
	12	20.9	22.6	24.2	25.6	27.0	21.8	23.6	25.4	27.0	28.5
	14	21.8	23.6	25.3	26.8	28.3	22.5	24.4	26.3	28.0	29.6
	6	17.8	19.2	20.5	21.7	22.8	19.7	21.2	22.7	24.0	25.3
	8	19.7	21.3	22.7	24.1	25.4	21.4	23.1	24.8	26.3	27.8
6	10	21.1	22.8	24.4	25.9	27.2	22.5	24.4	26.3	28.0	29.7
	12	22.1	23.9	25.6	27.2	28.7	23.3	25.3	27.3	29.2	31.0
	14	22.9	24.8	26.6	28.2	29.8	23.9	26.0	28.1	30.1	32.0
	6	20.9	22.7	24.3	25.9	27.4	22.3	24.2	26.0	27.7	29.4
	8	22.7	24.7	26.6	28.4	30.0	23.8	25.9	28.0	29.9	31.7
8	10	23.9	26.1	28.1	30.1	31.9	24.6	27.0	29.3	31.3	33.3
	12	24.8	27.1	29.3	31.3	33.2	25.2	27.7	30.1	32.4	34.6
	14	25.4	27.8	30.1	32.2	34.2	25.7	28.2	30.7	33.1	35.4

Note: Please contact your representative for ARI ratings for coils. These tables are only estimates. For extimates for other web bulb and evaporator temperatures, multiply by correction factors in Table 18.

Actual capacity will vary

with coil circuiting

Table 18:

						Capacity Correction Factors* To Coil Performance
						Of 67°F Wb And 40°F Evaporating
Ent Air WB						Refrigerant Evaporating Temperature °F.
Temp. °F.	35	36	37	38	39	40	41	42	43	44	45	46	47	48	49	50
60	0.820	0.794	0.768	0.740	0.713	0.685	0.656	0.628	0.598	0.568	0.538	0.506	0.475	0.442	0.409	0.376
61	0.862	0.837	0.810	0.783	0.756	0.727	0.698	0.670	0.640	0.610	0.580	0.548	0.517	0.484	0.452	0.418
62	0.907	0.881	0.854	0.827	0.799	0.771	0.743	0.714	0.684	0.654	0.623	0.592	0.561	0.528	0.496	0.462
63	0.950	0.923	0.897	0.870	0.842	0.814	0.785	0.756	0.727	0.696	0.666	0.635	0.603	0.571	0.538	0.505
64	0.994	0.969	0.942	0.914	0.887	0.859	0.831	0.802	0.772	0.742	0.712	0.680	0.649	0.616	0.583	0.550
65	1.040	1.014	0.988	0.960	0.933	0.905	0.876	0.847	0.818	0.788	0.757	0.726	0.694	0.662	0.629	0.596
66	1.087	1.061	1.035	1.008	0.980	0.952	0.923	0.894	0.864	0.835	0.804	0.773	0.741	0.709	0.676	0.642
67	1.136	1.109	1.083	1.055	1.028	1.000	0.971	0.943	0.913	0.883	0.852	0.822	0.789	0.757	0.724	0.691
68	1.185	1.158	1.132	1.105	1.077	1.050	1.020	0.992	0.962	0.932	0.901	0.870	0.838	0.806	0.773	0.740
69	1.235	1.209	1.182	1.155	1.127	1.100	1.071	1.042	1.012	0.982	0.952	0.920	0.889	0.856	0.824	0.790
70	1.286	1.260	1.235	1.206	1.179	1.152	1.122	1.094	1.063	1.033	1.003	0.972	0.940	0.908	0.875	0.841
71	1.339	1.313	1.285	1.260	1.231	1.203	1.175	1.146	1.115	1.086	1.055	1.024	0.993	0.960	0.927	0.894
72	1.393	1.365	1.340	1.314	1.285	1.257	1.229	1.200	1.170	1.140	1.110	1.079	1.046	1.015	0.981	0.948
73	1.450	1.422	1.395	1.369	1.340	1.313	1.285	1.255	1.225	1.195	1.165	1.134	1.103	1.070	1.036	1.003
74	1.505	1.479	1.451	1.425	1.396	1.370	1.340	1.310	1.281	1.252	1.221	1.190	1.159	1.126	1.094	1.060

* Note: correction factor = (enthalpy of air temperature - enthalpy of evaporator temperature) in BTU/LB divided by 16.39

21