Bosch 19 SEER Series Operation Manual page 21

Installation & Operation Manual
Figure 26
E nsure the temperature sampling position as shown above.
I f calculated subcooling value is lower than the design
subcooling value (Table 12), please add refrigerant. Repeat
steps 2 through 4.
Liquid
Line Temp 6 7 8
(°F)
Liquid Gauge Pressure (PSI)
55
173 176 179
60
188 191 195
65
204 208 211
70
221 225 229
75
239 243 247
80
259 262 266
85
279 283 287
90
300 304 309
95
322 327 331
100
346 351 355
105
370 376 381
110
397 402 407
115
424 430 435
120
453 459 465
125
483 489 469
Table 11
R-410A Refrigerant Chart - Final Subcooling
Heat Pump Model
BRB-60HWD1N1-M19
Table 12
5. Adjust refrigerant level to attain proper gauge pressure.
A dd refrigerant if the subcooling reading from Table 11 is
lower than the designed value (Table 12).
BTC 761701105 A | 03.2019
Final Subcooling(°F)
9 10 11 12
182 185 188 191
198 201 204 208
215 218 221 225
232 236 239 243
251 255 259 262
270 275 279 283
291 295 300 304
313 318 322 327
336 341 346 351
360 365 370 376
386 391 397 402
413 418 424 430
441 447 453 459
471 477 483 489
502 508 515 521
Design Subcooling
12°F ± 4°F

Connect gauges to refrigerant bottle and unit as illustrated
(Figure 25).

Purge all hoses.

Open tank.

Stop adding refrigerant when subcooling matches the
charging chart (Table 11) Final Subcooling value.
R ecover refrigerant if the subcooling reading from Table 11 is
higher than the designed value (Table 12).
13
Figure 27
6. Stabilize the system.
195

211 Wait 5 minutes for the system condition to stabilize
between adjustments.
229
247
W hen the subcooling matches the chart, the system is properly
266
charged.
287
309

Remove gauges.
331

355
Replace service port caps to prevent leaks. Tighten finger
tight plus an additional 1/6 turn.
381
407
7. Record System Information for reference (Table12). Record system
pressures and temperatures after charging is complete.
435
465
T he subcooling also can be calculated by pressing check button
496
after getting T3 and T3L temperatures (refer to table 17).
528
Description
Outdoor model number
Measured Outdoor Ambient
Measured Indoor Ambient
Check Condenser Outlet Temp.(T3L)
Check Condenser Temp.(T3)
Calculate subcooling value =T3 ‒ T3L
Table 13
Bosch Inverter Ducted Packaged Heat Pump | 21
Value
°F
°F
°F
°F
°F
Data subject to change