Lenox Elite Series X16 Air Conditioner Units, 506637-01 System Operation, TWO−STAGE Compressor

Table 3. HFC−410A Temperature (°F) − Pressure (Psig)

°F	Psig	°F	Psig	°F	Psig	°F	Psig	°F	Psig	°F	Psig	°F	Psig	°F	Psig
32	100.8	48	137.1	63	178.5	79	231.6	94	290.8	110	365.0	125	445.9	141	545.6
33	102.9	49	139.6	64	181.6	80	235.3	95	295.1	111	370.0	126	451.8	142	552.3
34	105.0	50	142.2	65	184.3	81	239.0	96	299.4	112	375.1	127	457.6	143	559.1
35	107.1	51	144.8	66	187.7	82	242.7	97	303.8	113	380.2	128	463.5	144	565.9
36	109.2	52	147.4	67	190.9	83	246.5	98	308.2	114	385.4	129	469.5	145	572.8
37	111.4	53	150.1	68	194.1	84	250.3	99	312.7	115	390.7	130	475.6	146	579.8
38	113.6	54	152.8	69	197.3	85	254.1	100	317.2	116	396.0	131	481.6	147	586.8
39	115.8	55	155.5	70	200.6	86	258.0	101	321.8	117	401.3	132	487.8	148	593.8
40	118.0	56	158.2	71	203.9	87	262.0	102	326.4	118	406.7	133	494.0	149	601.0
41	120.3	57	161.0	72	207.2	88	266.0	103	331.0	119	412.2	134	500.2	150	608.1
42	122.6	58	163.9	73	210.6	89	270.0	104	335.7	120	417.7	135	506.5	151	615.4
43	125.0	59	166.7	74	214.0	90	274.1	105	340.5	121	423.2	136	512.9	152	622.7
44	127.3	60	169.6	75	217.4	91	278.2	106	345.3	122	428.8	137	519.3	153	630.1
45	129.7	61	172.6	76	220.9	92	282.3	107	350.1	123	434.5	138	525.8	154	637.5
46	132.2	62	175.4	77	224.4	93	286.5	108	355.0	124	440.2	139	532.4	155	645.0
47	134.6			78	228.0			109	360.0			140	539.0

Table 4. Normal Operating Pressures (Liquid +10 and Suction +5 psig)

				Use this table to perform maintenance checks; it is not a procedure for charging the
IMPORTANT				system. Minor variations in these pressures may be due to differences in installations.
				Significant deviations could mean that the system is not properly charged or that a
				problem exists with some component in the system.
Temp. of air		−024				−036			−048			−060
entering
outdoor coil
	Liquid		Suction		Liquid		Suction	Liquid		Suction	Liquid		Suction
5F (5C)
					First Stage (Low Capacity)
65 (18.3)	215		144		226		142	224		142	215		136
75 (23.9)	247		146		261		144	258		144	250		139
85 (29.4)	288		148		304		145	299		146	291		142
95 (35.0)	332		151		352		147	345		148	337		144
105 (40.6)	381		153		405		150	395		150	388		146
115 (46.1)	435		155		460		150	450		153	444		148
					Second Stage (High Capacity)
65 (18.3)	225		140		228		144	235		135	220		130
75 (23.9)	258		142		262		146	269		137	256		133
85 (29.4)	301		144		306		148	313		139	299		136
95 (35.0)	346		146		353		150	361		141	347		138
105 (40.6)	397		149		405		151	412		143	402		141
115 (46.1)	452		151		462		154	471		146	462		143

*These are typical pressures only. Indoor indoor match up, indoor air quality, and indoor load will cause the pressures to vary.

System Operation

TWO−STAGE COMPRESSOR

The two−stage scroll compressor operates much like the standard scroll compressor. The two−stage compressor steps between low capacity and high capacity as required to meet cooling demand. The steps occur when gas is bypassed through a vent port in the first suction pocket. This bypassing of gas allows the compressor to operate at low capacity if thermostat demand allows, creating a more cost effective and efficient compressor.

Full capacity is achieved by blocking the vent port with a slider ring. The slider ring (vent port cover) is controlled by a 24VDC internal solenoid in the open position allowing low capacity. When energized the internal solenoid closes the slider ring, blocking the vent port and bringing the compressor to full capacity. Stepping can occur during a single thermostat demand as the motor runs continuously while the compressor steps from low to full capacity.

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XC16 SERIES