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TABLE 7. Normal Operating Pressures* – Single and Two Stage – Residential
Entering Outdoor
Air Temp
ºF (ºC)
ELS090 + (2) CX35-060C ELS090 + (2) CX35-060D
STAGE 1 STAGE 1
ºF (ºC) Liquid Suction Liquid Suction
65 (18) 255 139 253 134
75 (24) 295 142 293 137
85 (29) 340 145 338 140
95 (35) 389 147 386 143
105 (41) 442 150 439 146
115 (46) 498 153 496 149
125 (52) 559 156 558 153
SCFM 3000 3000
Entering
Outdoor Air
Temp
ºF (ºC)
ELS120S4D + (2) CBA27UHE-060
or (2) CBA38MV-060
ELS120S4D + (2) CH33-62D ELS120S4D + (2) CH23-068
STAGE 1 STAGE 2 STAGE 1 STAGE 2 STAGE 1 STAGE 2
ºF (ºC) Liquid Suction Liquid Suction Liquid Suction Liquid Suction Liquid Suction Liquid Suction
65 (18) 251 133 250 131 240 125 241 125 241 128 242 128
75 (24) 292 135 287 134 280 129 282 128 281 131 283 131
85 (29) 340 137 333 136 324 132 326 131 325 134 326 133
95 (35) 391 140 384 139 372 135 374 134 373 137 375 136
105 (41) 446 143 441 142 425 139 427 137 427 141 428 139
115 (46) 505 145 501 144 483 143 484 141 484 144 486 142
125 (52) 569 148 566 147 545 146 548 145 547 147 550 146
SCFM 3615 3200 3200
Entering
Outdoor Air
Temp ºF (ºC)
ELS120S4D + (2) CX35-60C ELS120S4D + (2) CX35-60D
STAGE 1 STAGE 2 STAGE 1 STAGE 2
ºF (ºC) Liquid Suction Liquid Suction Liquid Suction Liquid Suction
65 (18) 241 130 243 129 240 127 241 127
75 (24) 282 133 282 132 281 130 282 130
85 (29) 326 136 327 135 325 134 327 133
95 (35) 374 139 375 138 373 137 374 136
105 (41) 427 142 428 141 427 141 428 139
115 (46) 485 145 486 144 484 145 486 143
125 (52) 548 148 550 147 548 148 550 146
SCFM 3200 3200
Entering
Outdoor Air
Temp ºF (ºC)
ELS120S4D + (2) CBA25UH-060
STAGE 1 STAGE 2
ºF (ºC) Liquid Suction Liquid Suction
65 (18) 253 127 255 127
75 (24) 292 129 284 129
85 (29) 326 132 326 132
95 (35) 375 135 377 135
105 (41) 425 141 433 141
115 (46) 479 144 489 144
125 (52) 542 146 548 146
SCFM 3500
*Pressures at 80ºF dry bulb and 67ºF wet bulb entering indoor air temperatures.
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