Bosch BOVB 18 Series - Page 24

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Bosch IDS BOVB 18 Installation Instructions
10.2020 | Bosch Thermotechnology Corp.Data subject to change
Design Subcooling
Model Subcooling/°F Superheat/°F Note
24K/36K
10±2 10~18
Specifi cation applicable for indoor
units with adjustable or non-
adjustable TXV
8±2 7~10
Specifi cation applicable for indoor
units with non-adjustable TXV
48K
8±2 9~18
Specifi cation applicable for indoor
units with adjustable or non-
adjustable TXV
6±2 7~9
Specifi cation applicable for indoor
units with non-adjustable TXV
60K
8±2 8~18
Specifi cation applicable for indoor
units with adjustable or non-
adjustable TXV
6±2 6~8
Specifi cation applicable for indoor
units with non-adjustable TXV
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. 41).
 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 42
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.
 Remove gauges.
 Replace service port caps to prevent leaks. Tighten finger tight plus an
additional 1/6 turn.
8. Record System Information for reference (Table 10).
Record system pressures and temperatures after charging is complete.
Description Value
Outdoor model number
Measured Outdoor Ambient °F
Measured Indoor Ambient °F
Measured Liquid Line Temp °F
Measured Suction Line Temp °F
Liquid Gauge Pressure PSIG
Suction Gauge Pressure PSIG
Table 10