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ESI Outdoor Unit Installation Instruction
05.2018
Manufacturer reserves the right to change at any time for specifications or designs without notice and incurring obligations.
7. Refrigerant System Leak Check
Leak check is required for the brazed pipe connections.
1. Pressurize the brazed refrigerant pipes and indoor coil to at least 150 PSIG using dry nitrogen.
2. Check for leaks by using a soapy solution or bubbles at each brazed location.
150PSIG
8. Evacuation
Figure 7-1 Charge dry nitrogen to the system
Figure 7-2 Leak check
Do not open the service valves until the 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.
2. Evacuation is complete if the micron gauge does not rise above 500 microns in one minute.
1 MIN
Figure 8-1 Evacuation the refrigerant system