On Saturday, May 6, 2017 at 2:32:40 PM UTC-4, dpb wrote:
On 05/06/2017 1:16 PM, rangerssuck wrote:
...

I surely am hoping that we are on the low side of this range - this stuff is expensive.


Well, how much _did_ you recover, you know? If _that_ number is big...

My only experience w/ rink refrigeration systems were all
ammonia-based...I suppose that is telling on their age!

--

We didn't get nearly enough - not enough to re-start the system. As I said, there have been non-insignificant leaks.

This rink was built in 1980. I am familiar with much newer facilities than this that run ammonia systems, though not under the ice. They have heat exchangers and run chilled glycol or brine under the ice.