Bosch BOVB 18 Series Installation Instructions Manual page 24

2 4 | Bosch IDS BOVB 18
Design Subcooling
Model Subcooling/°F Superheat/°F
10±2 10~18
24K/36K
8±2
8±2
48K
6±2
8±2
60K
6±2
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.
Data subject to change
Note
Specifi cation applicable for indoor
units with adjustable or non-
adjustable TXV
Specifi cation applicable for indoor
7~10
units with non-adjustable TXV
Specifi cation applicable for indoor
9~18 units with adjustable or non-
adjustable TXV
Specifi cation applicable for indoor
7~9
units with non-adjustable TXV
Specifi cation applicable for indoor
8~18 units with adjustable or non-
adjustable TXV
Specifi cation applicable for indoor
6~8
units with non-adjustable TXV
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
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
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