Carrier 50CR Cooling Charging Table-Subcooling, ECMWet Coil Pressure Drop in. wg, Small Cabinet

		Required Subcooling oF (oC)							Required Liquid Line Temperature for a Specific Subcooling (R-410A)
			Outdoor Ambient Temperature						Required Subcooling (oF)						Required Subcooling (oC)
Model Size	75 (24)		82 (28)	85 (29)	95 (35)	105 (41)	Pressure						Pressure
							(psig)	5	10	15	20	25	(kPa)	3	6	8	11	14
024	10.3 ( 5.7 )		9.8 ( 5.4 )	9.4 ( 5.2 )	9 ( 5 )	8.6 ( 4.7 )	189	61	56	51	46	41	1303	16	13	11	8	5
030	9.3 ( 5.2 )		8.8 ( 4.9 )	8.6 ( 4.8 )	7.8 ( 4.3 )	7 ( 3.9 )	196	63	58	53	48	43	1351	17	15	12	9	6
036	17.6 ( 9.8 )		16.8 ( 9.3 )	16.5 ( 9.2 )	15.4 ( 8.6 )	14.3 ( 7.9 )	203	66	61	56	51	46	1399	19	16	13	10	8
042	12.8 ( 7.1 )		12.7 ( 7.1 )	12.7 ( 7.1 )	12.6 ( 7 )	12.6 ( 7 )	210	68	63	58	53	48	1448	20	17	14	11	9
048	17.5 ( 9.7 )		16.9 ( 9.4 )	16.6 ( 9.2 )	15.7 ( 8.7 )	14.8 ( 8.2 )	217	70	65	60	55	50	1496	21	18	15	13	10
060	13.7 ( 7.6 )		13 ( 7.2 )	13 ( 7.2 )	14.5 ( 8.1 )	11.5 ( 6.4 )	224	72	67	62	57	52	1544	22	19	16	14	11
Charging Procedure							231	74	69	64	59	54	1593	23	20	18	15	12
							238	76	71	66	61	56	1641	24	21	19	16	13
1- Measure Discharge line pressure by attaching a gauge to the service port.							245	77	72	67	62	57	1689	25	22	20	17	14
							252	79	74	69	64	59	1737	26	23	21	18	15
2- Measure the Liquid line temperature by attaching a temperature sensing							260	81	76	71	66	61	1792	27	25	22	19	16
device to it.							268	83	78	73	68	63	1848	29	26	23	20	17
3- Insulate the temperature sensing device so that the Outdoor Ambient							276	85	80	75	70	65	1903	30	27	24	21	19
doesn’t affect the reading.							284	87	82	77	72	67	1958	31	28	25	22	20
4- Refer to the required Subcooling in the table based on the model size and							292	89	84	79	74	69	2013	32	29	26	23	21
the Outdoor Ambient temperature.							300	91	86	81	76	71	2068	33	30	27	24	22
5- Interpolate if the Outdoor ambient temperature lies in between the table							309	93	88	83	78	73	2130	34	31	28	26	23
values. Extrapolate if the temperature lies beyond the table range.							318	95	90	85	80	75	2192	35	32	29	27	24
6- Find the Pressure Value in the table corresponding to the the measured							327	97	92	87	82	77	2254	36	33	31	28	25
Pressure of the Compressor Discharge line.							336	99	94	89	84	79	2316	37	34	32	29	26
7- Read across from the Pressure reading to obtain the Liquid line							345	101	96	91	86	81	2378	38	35	33	30	27
temperature for a required Subcooling							354	103	98	93	88	83	2440	39	36	34	31	28
8- Add Charge if the measured temperature is higher than the table value.							364	105	100	95	90	85	2509	40	38	35	32	29
							374	107	102	97	92	87	2578	41	39	36	33	30
							384	108	103	98	93	88	2647	42	40	37	34	31
							394	110	105	100	95	90	2716	44	41	38	35	32
							404	112	107	102	97	92	2785	45	42	39	36	33
							414	114	109	104	99	94	2854	46	43	40	37	34
							424	116	111	106	101	96	2923	47	44	41	38	35
							434	118	113	108	103	98	2992	48	45	42	39	36
							444	119	114	109	104	99	3061	48	46	43	40	37
							454	121	116	111	106	101	3130	49	47	44	41	38
							464	123	118	113	108	103	3199	50	48	45	42	39
							474	124	119	114	109	104	3268	51	48	46	43	40
							484	126	121	116	111	106	3337	52	49	47	44	41
							494	127	122	117	112	107	3406	53	50	47	45	42
							504	129	124	119	114	109	3475	54	51	48	46	43
							514	131	126	121	116	111	3544	55	52	49	46	44
							524	132	127	122	117	112	3612	56	53	50	47	45
							534	134	129	124	119	114	3681	56	54	51	48	45

C03027

Fig. 22 - Cooling Charging Table-Subcooling

Table 3—ECM Wet Coil Pressure Drop (in. wg)

UNIT							STANDARD CFM (SCFM)
SIZE
	600	700	800	900	1000	1100	1200	1300	1400	1500	1600	1700	1800	1900	2000	2100
024	0.005	0.007	0.010	0.012	0.015	–	–	–	–	–	–	–	–	–	–	–
030	–	0.007	0.010	0.012	0.015	0.018	0.021	0.024	–	–	–	–	–	–	–	–
036	–	–	–	0.019	0.023	0.027	0.032	0.037	0.042	0.047	–	–	–	–	–	–
042	–	–	–	–	0.014	0.017	0.020	0.024	0.027	0.031	0.035	0.039	0.043	–	–	–
048	–	–	–	–	–	–	0.027	0.032	0.036	0.041	0.046	0.052	0.057	0.063	0.068	–
060	–	–	–	–	–	–	–	–	–	0.029	0.032	0.036	0.040	0.045	0.049	0.053

Table 4—Filter Pressure Drop Table (in. wg)

FILTER SIZE										CFM
	500	600	700	800	900	1000	1100	1200	1300	1400	1500	1600	1700	1800	1900	2000	2100	2200	2300
20X20X1	0.05	0.07	0.08	0.1	0.12	0.13	0.14	0.15	—	—	—	—	—	—	—	—	—	—	—
24X30X1	—	—	—	—	0.05	0.6	0.07	0.07	0.08	0.09	0.1	—	—	—	—	—	—	—	—
24X36X1	—	—	—	—	—	—	—	0.06	0.07	0.07	0.08	0.09	0.09	0.10	0.11	0.12	0.13	0.14	0.14

Table 5—Electric Heat Pressure Drop Table

Small Cabinet: 024-036

							CFM
	500	600	700	800	900	1000	1100	1200	1300	1400	1500	1600
5 kw	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.02	0.04	0.06	0.07
7.2 kw	0.00	0.00	0.00	0.00	0.00	0.00	0.02	0.03	0.05	0.07	0.08	0.09
10 kw	0.00	0.00	0.00	0.00	0.00	0.02	0.04	0.06	0.07	0.09	0.10	0.11
15 kw	0.00	0.00	0.00	0.02	0.04	0.06	0.08	0.10	0.12	0.14	0.16	0.18
20 kw	0.00	0.00	0.02	0.04	0.06	0.08	0.09	0.11	0.13	0.15	0.17	0.19

50CR

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