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STEP 3 - Stabilize the system by operating for a
minimum of 20 minutes.
At startup, or whenever charge is removed or
added, the system must be operated for a mini-
mum of 20 minutes to stabilize before accurate
measurements can be made.
STEP 4 - Measure the liquid line temperature
and pressure at the outdoor unit's service valve.
Measured Liquid Line Temp = __________ º F
Liquid Gage Pressure = __________ PSI
Final Subcooling Value = __________ º F
STEP 5 - Use the final subcooling value, refriger-
ant temperature and pressure from STEP 4, to
determine the proper liquid gage pressure using
Table 14.2.
Example: Assume a 12º F Final Subcooling
value and liquid temp of 90º F.
1. Locate 12º F Final Subcooling in Table 14.2.
2. Locate the Liquid Temperarature (90º F) in
the left column.
3. The Liquid Gage Pressure should be ap-
proximately 327 PSI. (This is the shown as
the intersection of the Final Subcooling column
and the Liquid Temperature row.
16
20 MIN.
Table 14.2
R-410A REFRIGERANT CHARGING CHART
FINAL SUBCOOLING (
LIQUID
8
9
10
11
TEMP
°
(
F)
LIQUID GAGE PRESSURE (PSI)
55
179 182 185 188 191 195 198
60
195 198 201 204 208 211 215
65
211 215 218 222 225 229 232
70
229 232 236 240 243 247 251
75
247 251 255 259 263 267 271
80
267 271 275 279 283 287 291
85
287 291 296 300 304 309 313
90
309 313 318 322 327 331 336
95
331 336 341 346 351 355 360
100
355 360 365 370 376 381 386
105
381 386 391 396 402 407 413
110
407 413 418 424 429 435 441
115
435 441 446 452 458 464 470
120
464 470 476 482 488 495 501
125
495 501 507 514 520 527 533
From Dwg. D154557P01 Rev. 3
107 °F
°
F)
12
13
14
18-AC123D1-1B-EN
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