Lennox SSB048H4S4 User Manual

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SSB*H4 SERIES
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)
IMPORTANT
Use this table to perform maintenance checks; it is not a procedure for charging the 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.
Model SSB036H4S4 SSB048H4S4 SSB060H4S4
5F (5C)*
Liquid Suction Liquid Suction Liquid Suction
First Stage (Low Capacity)
65 (18) 217 141 229 140 229 134
75 (24) 251 143 263 143 264 138
85 (29) 292 146 304 146 305 140
95 (35) 337 147 350 148 349 142
105 (41) 387 150 400 150 402 147
115 (46) 440 154 453 155 455 149
Second Stage (High Capacity)
65 (18) 230 137 234 135 244 129
75 (24) 265 140 269 137 282 131
85 (29) 307 141 312 140 324 133
95 (35) 354 144 359 141 371 136
105 (41) 405 146 409 143 422 139
115 (46) 460 149 465 146 474 143
*Temperature of air entering outdoor coil.
**(Liquid +10 psig; Vapor +5 psig) Typical pressures; indoor unit match up, indoor air quality equipment, and indoor load will cause the pressures to vary.
System Operation
SECOND-STAGE OPERATION
If the demand defrost control (A108) receives a call for
second-stage compressor operation Y2 in heating or
cooling mode and the first‐stage compressor output is
active, the second‐stage compressor solenoid output will
be energized.
If first‐stage compressor output is active in heating mode
and the outdoor ambient temperature is below the selected
compressor lock-in temperature, the second‐stage
compressor solenoid output will be energized without the
Y2 input. If the jumper is not connected to one of the
temperature selection pins on P3 (40, 45, 50, 55°F), the
default lock-in temperature of 40°F (4.5°C) will be used.
IMPORTANT
Some scroll compressor have internal vacuum protector
that will unload scrolls when suction pressure goes
below 20 psig. A hissing sound will be heard when the
compressor is running unloaded. Protector will reset
when low pressure in system is raised above 40 psig. DO
NOT REPLACE COMPRESSOR.

Lennox SSB048H4S4 Specifications

General

Brand	Lennox
Model	SSB048H4S4
Category	Air Conditioner
Language	English