Bosch BOVA Series Installation Instructions Manual page 22

2 2 | Bosch IDS 2.0 BOVA
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) 48
Table 6
20 MIN.
Figure 39
4. Calculate superheat value (According to Table 7)

Measured Suction Line Temp = ________ºF

Measured Suction Line Pressure = _______ PSIG

Calculate superheat value = ________ºF
C heck the superheat and select correct subcooling according to
superheat, refer to Table 9. It is recommended to keep the superheat at
10-18°F if a third party indoor unit is used.
5. Calculate subcooling value (According to Table 8)

Measured Liquid Line Temp. = ________ºF

Measured Liquid Line Pressure = _______ PSIG

Calculate subcooling value = ________ºF
Figure 40
Data subject to change
3TON 4TON 5TON
72 54 62
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 12
(°F)
40 105 101 97 93
42 109 105 101 97
44 114 109 105 101
46 118 114 109 105
48 123 118 114 109
50 128 123 118 114
52 133 128 123 118
54 138 133 128 123
56 143 138 133 128
58 148 143 138 133
60 153 148 143 138
62 159 153 148 143
64 164 159 153 148
66 170 164 159 153
68 176 170 164 159
70 182 176 170 164
72 188 182 176 170
Table 7 R-410A Refrigerant chart - Final Superheat
Liquid
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 8
R-410A Refrigerant chart - Final Subcooling
Design Subcooling
Model
24K/36K
48K
60K
Table 9
Installation Instructions
Final Superheat (°F)
14 16 18 20
Suction Gauge Pressure (PSI)
89 86 82 78
93 89 86 82
97 93 89 86
101 97 93 89
105 101 97 93
109 105 101 97
114 109 105 101
118 114 109 105
123 118 114 109
128 123 118 114
133 128 123 118
138 133 128 123
143 138 133 128
148 143 138 133
153 148 143 138
159 153 148 143
164 159 153 148
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
Subcooling/℉ Superheat/℉
10±2 10―18
8±2 7―10
8±2 9―18
6±2 7―9
8±2 8―18
6±2 6―8
02.2019 | Bosch Thermotechnology Corp.
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