I don't believe your numbers. Or I need to buy a whole lot of chillers just like yours.....

COP in consistent units is (KW extracted/KW Input) and high numbers represent good performance.

KW/Ton is the inverse: It is the input divided by the output, so low numbers are good. But the units don't quite work out if that Ton is TR as in the effect of melting one ton of ice.

A cubic meter of water weighs 1000 Kg. So your mass flow is 818000 kg/hr. The sensible heat of water at these temperatures is 4.18 kJ/kG-Deg C. 52.9 Deg F. is equiv of 11.6 Deg. C. 46.5 Deg F is equiv of 8 deg C.
A Kilowatt is a Kilojoule per Second. So the Arithmetic is:

Q= Mdot Cp Delta-T

=818000*4.18*(11.6-8)

=12167298 Kilojoules per hour....
so
To bring it to KW: Divide by 3600 so its Kilojoules per Second

=3377 KW or about 960 TR

That gives you a COP of about 36 which is far too high. Sure you are not looking at the power input to the Chilled Water Pumps? Are those temperatures being produced by a cooling tower without the compressor operating?