Lester : Some if not most of the off-gasing from your new wood heater was really a surface coating referred to in the industry as Shipping oil(s)
These are there to retard the presence of any visible Rust in your new product during shipment and periods of long storage in unheated ware-
houses while awaiting " Shipping'', hence the name !
A little of the smell and or smoke might have come from the volatile oils left in the protective paint.
So naturally they wanted you to burn a couple of small fires to slowly dissipate the fumes of their 'final curtain call'
Often some aromatics are added to make this more pleasant and less noticeable
experience, the stuff they used up through the Korean war
era would need hand cleaning before you could put it in service,. This is Much better Big AL