Bosch IDS BOVA15 Installation Instructions Manual page 21

Design Subcooling
Model Subcooling/°F
2 Ton 6 - 12
3 Ton 8 - 15
4 Ton & 5 Ton 6 - 12
Table 9
6. Adjust refrigerant level to attain proper gauge pressure.
Add refrigerant if the subcooling reading from Table 8 is lower
than the designed value (Table 9).

Connect gauges to refrigerant bottle and unit as illustrated (Fig.37).

Purge all hoses.

Open tank.

Stop adding refrigerant when subcooling matches the design value (Table
9).
Recover refrigerant if the subcooling reading from Table 8 is higher
than the design value (Table 9).
Figure 37
7. Stabilize the system.

Wait 5 minutes for the system condition to stabilize between adjustments.
When the subcooling matches the design value (Table 9), the system is
properly charged.
Bosch IDS BOVA15 Split System Heat Pump - BTC 761701317 A (02.2022)

Remove gauges.
Superheat/°F

Replace service port caps to prevent leaks. Tighten finger tight plus an
6 - 18
additional 1/6 turn.
6 - 18
8. Record System Information for reference (Table 10).
Record system pressures and temperatures after charging is complete.
6 - 18
Description
Outdoor model number
Measured Outdoor Ambient
Measured Indoor Ambient
Measured Liquid Line Temp
Measured Suction Line Temp
Liquid Gauge Pressure
Suction Gauge Pressure
Table 10
Installation Instructions
Value
°F
°F
°F
°F
PSIG
PSIG
| 21