Bosch IDS BOVB20 - Refrigerant Line Leak Check; Check For Leaks; Evacuation; Evacuate Lines and Indoor Coil

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Installation Instructions
Bosch IDS BOVB20 Split System Heat Pump - BTC 761701316 C (02.2022)
9 Refrigerant Line Leak Check
9.1 Check For Leaks
1. Pressurize the refrigerant lines and evaporator coil to 150 PSIG using dry
nitrogen.
Figure 22
150 PSI
G
2. Check for leaks by using a soapy solution or bubbles at each brazed location.
Figure 23
10 Evacuation
10.1 Evacuate the Refrigerant Lines and Indoor Coil
Do not open the service valves until the refrigerant lines and indoor coil
leak check and evacuation are complete.
1. Evacuate until the micron gauge reads no higher than 350 microns, then
close the valve to the vacuum pump.
Figure 24
0350
Microns
ON
OFF
2. Observe the micron gauge. Evacuation is complete if the micron gauge does
not rise above 500 microns in one (1) minute.
Once evacuation is complete, turn off the vacuum pump and micron gauge,
and close the valves on the manifold gauge set.
Figure 25
1MIN.