10
88-A5PA3001-1A-EN
Charging in Cooling above
55°F OD Ambient
If servicing the equipment requires system evacuation,
then re-charge the system to the weight specified on
the nameplate. Verify the system subcooling using the
Subcooling Charging Table and, if necessary, adjust
the charge using the procedure below.
1. For best results — the indoor temperature should
be kept between 70°F to 80°F. Add system heat if
needed.
2. Whenever charge is removed or added, the system
must be operated for a minimum of 20 minutes to
stabilize before accurate measurements can be
made.
3. Measure Liquid Line Temperature and Refrigerant
Pressure at service valved in the compressor
compartment.
4. Locate your liquid line temperature in the left
column of the table, and the intersecting liquid line
pressure under the subcool value column, Add
refrigerant to raise the pressure to match the table,
or remove refrigerant to lower the pressure. Again,
wait 20 minutes for the system conditions to
stabilize before adjusting charge again.
NNoottee:: System charge shall never be more than 110% or
less than 90% of nameplate charge. If specified
subcooling cannot be achieved within those
charge bounds, contact your Field Service
Representative.
5. When system is correctly charged, you can refer to
System Pressure Curves to verify typical
performance.
CCHHAARRGGIINNGG BBEELLOOWW 5555°°FF
Evacuate system and weigh in nameplate charge or
use factory charge. Correct subcooling may be verified
when the temperature is above 55°F.
R-454B REFRIGERANT CHARGING CHART
LIQUID
TEMP
(°F)
DESIGN SUBCOOLING (°F)
6 7 8 9 10 11 12 13 14
LIQUID GAGE PRESSURE (PSI)
55 164 167 170 172 175 178 181 184 187
60 178 181 184 187 190 194 197 200 203
65 193 197 200 203 206 210 213 217 220
70 210 213 217 220 223 227 230 234 238
75 227 230 234 238 241 245 249 252 256
80 245 249 252 256 260 264 268 272 276
85 264 268 272 276 280 284 288 292 297
90 284 288 292 297 301 305 309 314 318
95 305 309 314 318 323 327 332 336 341
100 327 332 336 341 346 351 355 360 356
105 351 355 360 365 370 375 380 385 390
110 375 380 385 390 396 401 406 412 417
115 401 406 412 417 422 428 433 439 445
120 428 433 439 445 450 456 462 468 474
125 456 462 468 474 480 486 492 498 504
IInnttrroodduuccttiioonn,, UUnniitt IInnssppeeccttiioonn aanndd SSppeecciiffiiccaattiioonn
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