I've got a customer who's buying his own splits for a hotel referb. I told him to buy R410a models as if he buys the R32 models i don't yet have the gas to top it up.

The systems are pre-charged for 7m and there will be 10-11m pipe runs. Meaning a top up of 90-120g respectively.

So, as R32 is an ingredient of R410a, what would happen if i added 120g of R410a to this R32 system?