** Adjusting the chilled water temperature can end in complete disaster if the sensor are defective or the water flow is insufficient.**
The tubes can freeze and break, allowing the water and refrigerant to mix.
Aside from the cost of shutting down the chillers cooling function and loss of that productivity, the cost of repairs can go well into the tens of thousands of dollars.
You do not want to be the man holding the bag if that happens... to do this properly you need all the data I asked for earlier. This tricky, and **risky business.
Trane recommends that only a factory trained Trane technician work on those systems for that reason.
However if you can give me the temperature readings I ask for then after that check the thermistors so that we can determine if they are reading accurately or not, I might be able to coach you to adjust the water temperature.
Regarding the EWT...that can be low, not because of any actual chiller settings but because the chilled water mixing and diverting valves at the air handlers or process cooling heat exchangers
are not working properly.
I can opt out if you like, or you can continue with me... this however is something that only a Trane chiller specialist should be putting his hands on.