For a closed-loop chilled water system, where is the best location to install the automatic air release valve?

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Hello everyone, I have a set of clean air conditioning systems that require chilled water at 7 degrees Celsius. The chiller units use a closed-loop chilled water system, and an automatic exhaust valve is installed at the inlet of the chilled water pump – of course, at a relatively high position. The performance isn’t very good; occasionally, there are high-pressure alarms in the units as well as power outages. The personnel on site connect a pipe at the location where the pressure gauge is installed on the outlet of the chilled water pump, sometimes to vent air. It doesn’t seem right either, as the outlet of the chilled water pump is located at a relatively low position. It may not necessarily work. Dear expert, I have two possible locations for installing the automatic exhaust valve. Which one is better? 1. On the vertical pipe that connects the chilled water to the expansion tank; this location is at a higher height, but it is also relatively close to the inlet of the chilled water pump ； 2. At a relatively high position on the water outlet pipeline at the rear of the refrigeration unit. Thank you all for discussing the proposals so much.