Closed Loops. Chilled Water, Hot Water, Heat Pump and Glycol Loops. Basic Terminology What are we talking about?. Close System – Any water recirculated system that is completely sealed and does not regularly or by design take on makeup
Chilled Water, Hot Water, Heat Pump and Glycol Loops
Closed loop systems should be the easiest to treat and they are, but when things go wrong they are also difficult to correct.
Normal Loop pH should be between 9.0 – 11.0, unless there is aluminum in the system, where it must be kept in the 8.0 – 8.8 range
Not all antifreeze agents are the same. There are many differences but these are probably the most important.