Figure 58: Leak test hold times
What to do next:
• For a unit with no loss of pressure, proceed to unit evacuation.
• For units where a leak is suspected and there is any amount of drop in recorded pressure,
proceed to either of the following leak detection methods: Conducting the soap visual gas leak
test or Conducting the optional trace gas leak test.
Conducting the soap visual gas leak test
1. To monitor the system pressure over time, install a high-quality, high-resolution analog
pressure gauge on one of the shells. Use a pressure gauge that has a resolution of 2 psi (13.8
kPa) increments with a dial face at 3 in. (76 mm) in diameter or greater.
2. Before proceeding, make sure that the unit is at the initial evacuation level of 5 mmHg.
143YVAM with OptiView Control Center
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