Accidentally mixed R404A with R134a

[toma]

Dear All,

We had compressor Danfoss MTZ28-4 for food chiller using R404A. Unfortunately our team member did not realize that the compressor is use R404A, he took R134A which we use for our HVAC system to recharge the food chiller. After desired suction pressure reached then he just realize he made mistaken. Now our food chiller still opreating, but cannot reach temperature setting (0-5 degC)? What would happen with our chiller system? Can we recharge it again with R404A to make the lower temperature? Thank you

[Peter_1]

Remove wrong refrigerant as much as possible with recovery unit and restart with the right refrigerant. Vacuum is not necessary because R404a consists of R134a.
It will never work and your TEV or capillary is not designed for this refrigerant.
If you want to destroy your compressor, let it run this way.