Bosch IDS BOVA15 Installation Instructions Manual page 20

Installation Instructions
3. Stabilize the system.
After starting the system in cooling mode, short press "FORCE" button,
and " " symbol should appear. System may take 10 minutes to ramp up.
Operate the system for a minimum of twenty (20) minutes.
After a twenty (20) minute stabilization period operating at 100%
capacity (i.e. once the compressor reaches the frequency shown in Table
6), maintain continuous operation while adjusting refrigerant charge.
After adjusting, operate system for a minimum of fi ve (5) minutes for
system to stabilize, otherwise repeat step 3.
Compressor Frequency in Force Mode in Cooling
ODU Capacity 2TON
Frequency (HZ) 46
Table 6
20 MIN.
Figure 35
4. Calculate superheat value (According to Table 7)

Measured Suction Line Temp = ________ºF

Measured Suction Line Pressure = _______ PSIG

Calculate superheat value = ________ºF
F or indoor unit with adjustable TXV, set subcooling and adjust superheat
via adjustable TXV according to Table 9. For indoor unit with non-
adjustable TXV, check the superheat and set correct subcooling
according to superheat, refer to Table 9.
5. Calculate subcooling value (According to Table 8)

Measured Liquid Line Temp. = ________ºF

Measured Liquid Line Pressure = _______ PSIG

Calculate subcooling value = ________ºF
Figure 36
2 0 |
3TON 4TON 5TON
66 54 60
Insulation
If calculated subcooling value is lower than the design subcooling value
(Table 9), please add refrigerant. Repeat steps 3 through 5.
If the superheat is out of range, refer to Troubleshooting section of this
IOM.
Suction
Temp 6 8 10
(°F)
40 105 101 97
42 109 105 101
44 114 109 105
46 118 114 109
48 123 118 114
50 128 123 118
52 133 128 123
54 138 133 128
56 143 138 133
58 148 143 138
60 153 148 143
62 159 153 148
64 164 159 153
66 170 164 159
68 176 170 164
70 182 176 170
72 188 182 176
Table 7
R-410A Refrigerant chart - Final Superheat
Liquid
Temp 6 7
(°F)
55 173 176
60 188 191
65 204 208
70 221 225
75 239 243
80 259 262
85 279 283
90 300 304
95 322 327
100 346 351
105 370 376
110 397 402
115 424 430
120 453 459
125 483 489
Table 8
R-410A Refrigerant chart - Final Subcooling
Bosch IDS BOVA15 Split System Heat Pump - BTC 761701317 A (02.2022)
Final Superheat (°F)
12 14 16 18 20
Suction Gauge Pressure (PSI)
93 89 86 82 78
97 93 89 86 82
101 97 93 89 86
105 101 97 93 89
109 105 101 97 93
114 109 105 101 97
118 114 109 105 101
123 118 114 109 105
128 123 118 114 109
133 128 123 118 114
138 133 128 123 118
143 138 133 128 123
148 143 138 133 128
153 148 143 138 133
159 153 148 143 138
164 159 153 148 143
170 164 159 153 148
Final Subcooling (°F)
8 9 10 11 12
Liquid Gauge Pressure (PSI)
179 182 185 188 191
195 198 201 204 208
211 215 218 221 225
229 232 236 239 243
247 251 255 259 262
266 270 275 279 283
287 291 295 300 304
309 313 318 322 327
331 336 341 346 351
355 360 365 370 376
381 386 391 397 402
407 413 418 424 430
435 441 447 453 459
465 471 477 483 489
469 502 508 515 521
22
75
78
82
86
89
93
97
101
105
109
114
118
123
128
133
138
143
13
195
211
229
247
266
287
309
331
355
381
407
435
465
496
528