During the winter, force carbing is easy because in certain parts of my cellar it is very cold. I simply chill the beer and set the regulator to 30 psi for 48 hours, and that does the trick.
During the summer, I usually carbonate naturally using sugar.
I have a beer ready now that I don’t have time to carbonate naturally. So my question is, how can I force carbonate at 60 F? What setting? How long?
Question, if I have the key in a cooler at about 42-44 F temperature, and connect the co2 at a pressure of 30 psi, you can know how long before carbonation?
I had to force carb a bunch of kegs @ 62 for my wedding last year and I took notes.
At 62 F I applied 50 PSI and PULLED THE GAS LINE. the next day the head pressure was 18 PSI.
I then hit it with 50 PSI and again PULLED THE GAS LINE. the next day I had head pressure at 29 and probably would have dropped a little lower with time. I was shooting for a stable/no gas added head pressure of 26 PSI to achieve 2.5 vols. your temp is pretty close so this should give you something to go on.
A word of caution: Old kegs are rated to over 100 psi but they are old, QD’s and gas line are not rated (at least not that I have seen/know). I have thick wall gas line and clamp at all hose barbs. 50 PSI is what I decided the highest acceptable pressure to use on my system/with my kegs. Use your best judgement when ramping up the pressure beyond serving.