Bryant 591B instruction manual Superheatcharging, Xiii. Final Checks, Care And Maintenance

TABLE 4—SUPERHEAT CHARGING

OUTDOOR TEMP (°F)				EVAPORATOR ENTERING AIR TEMPERATURE (°F WB)
	50	52	54	56		58			60		62		64			66		68	70			72	74		76
55	9	12	14	17		20			23		26		29			32		35	37			40	42		45
60	7	10	12	15		18			21		24		27			30		33	35			38	40		43
65	—	6	10	13		16			19		21		24			27		30	33			36	38		41
70	—	—	7	10		13			16		19		21		24		27		30		33		36		39
75	—	—	—	6		9			12		15		18		21		24		28		31		34		37
80	—	—	—	—	5			8		12		15		18		21		25		28		31		35
85	—	—	—	—	—		—	8		11				15		19		22	26			30	33
90	—	—	—	—	—		—	5		9				13		16		20	24			27	31
95	—	—	—	—	—		—		—	6		10				14		18	22			25	29
100	—	—	—	—	—		—		—		—	8				12		15	20			23	27
105	—	—	—	—	—		—		—		—	5				9		13	17			22	26
110	—	—	—	—	—		—		—		—		—			6		11	15			20	25
115	—	—	—	—	—		—		—		—		—			—		8	14			18	23

Where a dash (—) appears, do not attempt to charge system under these conditions or refrigerant slugging may occur. Charge must be weighed in. NOTE: Superheat °F is at low-side service port.

6.Refer to Table 4. Find outdoor temperature and evaporator entering air wet-bulb temperature. At this intersection, note superheat.

7.Refer to Table 5. Find superheat temperature located in item 6 and suction pressure. At this intersection, note suction line temperature.

8.If unit has a higher suction line temperature than charted temperature, add refrigerant until charted temperature is reached.

9.If unit has a lower suction line temperature than charted temperature, reclaim refrigerant until charted temperature is reached.

10.When adding refrigerant, charge in liquid form into suction service port using a flow-restricting device.

11.If outdoor air temperature or pressure at suction valve changes, charge to new suction line temperature indicated on chart.

XIII. FINAL CHECKS

IMPORTANT: Before leaving job, be sure to do the following:

1.Ensure that all wiring is routed away from tubing and sheet metal edges to prevent rub-through or wire pinching.

2.Ensure that all wiring and tubing is secure in unit before adding panels and covers. Securely fasten all panels and covers.

3.Tighten service valve stem caps to 1/12-turn past finger tight.

4.Leave User’s Manual with owner. Explain system operation and periodic maintenance requirements outlined in manual.

5.Fill out Dealer Installation Checklist and place in customer file.

CARE AND MAINTENANCE

For continuing high performance and to minimize possible equip- ment failure, periodic maintenance must be performed on this equipment.

Frequency of maintenance may vary depending upon geographic areas, such as coastal applications. See Users Manual for informa- tion.

TABLE 5—REQUIRED SUCTION-LINE TEMPERATURE

SUPERHEAT				SUCTION PRESSURE AT SERVICE PORT (PSIG)
TEMP
	107.8	112.2	116.8		121.2	126.0	130.8	138.8	140.8	145.8
(°F)
0	35	37	39		41	43	45	47	49	51
2	37	39	41		43	45	47	49	51	53
4	39	41	43		45	47	49	51	53	55
6	41	43	45		47	49	51	53	55	57
8	43	45	47		49	51	53	55	57	59
10	45	47	49		51	53	55	57	59	61
12	47	49	51		53	55	57	59	61	63
14	49	51	53		55	57	59	61	63	65
16	51	53	55		57	59	61	63	65	67
18	53	55	57		59	61	63	65	67	69
20	55	57	59		61	63	65	67	69	71
22	57	59	61		63	65	67	69	71	73
24	59	61	63		65	67	69	71	73	75
26	61	63	65		67	69	71	73	75	77
28	63	65	67		69	71	73	75	77	79
30	65	67	69		71	73	75	77	79	81
32	67	69	71		73	75	77	79	81	83
34	69	71	73		75	77	79	81	83	85
36	71	73	75		77	79	81	83	85	87
38	73	75	77		79	81	83	85	87	89
40	75	77	79		81	83	85	87	89	91

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