We use a dial indicator also with no problems . We let the compressor run then recheck it as it is now hot and adjust accordingly. Then run some more and recheck. A vibration analysist afterward can help to make sure you have no out of round vibrations if your that worried about it.
I hope...
Yes an acid is whats used at least it is where I am at. The only draw back is eventually it will eat away on your condensor tubes,but as long as you have the correct mixture in your water the tubes will last for years. Water analysis on a daily basis is a must. This is usualy done with the help...
I would say yea it is better to just run one cost wise ,but you have to consider your load factor. Are you set up for the other tower to turn on when you have high load days and if not then you either have to set it up for that so it operates automatically on and off depending on load or just...