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metal content in centrifgual chiller oil

We just performed a oil analysis test on the centrifugal chillers oil (Carrier P/N PP49-5). The result are as followed:

chiller no. 1
copper : 126 mg/kg
Lead : 6.73 mg/kg
Tin : 0.21 mg/kg
aluminium : 0.68 mg/kg
iron : 2.31 mg/kg
zinc : 257 mg/kg
acid number : 0.38
kinematic viscosity 40 deg C : 16.3 cSt
Flush point : 10 degC
water by distillation : 0.05 % vol

Anyone know what was the maximum metal content in chiller compressor
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