Kenneth
It looks like Table 2 is an example of maximum refrigerant charge for a single equipment with some assumptions and default leak rate of 2%, and end of year loss of 10%. If you find the equipment installed on your project has lower refrigerant charge, please use the actual number in the calculation. The credit is awarded if the Average Atmosphere Refrigerant Impact is less than 100. It would be very helpful to support all calculations and refrigerant charges with manufacturer data and cut sheets