Adding DAP too early

Dex-Pistol

Howdy. I'm currently on hour 39 of my first cider brew. I'm trying to avoid the dreaded "why hasn't my fermentation started yet?!?!*&@?!?!" post by asking a specific question.
After adding 6 gallons of apple juice (100%+asorbic acid) I added 6 tsp of DAP and 1 packet of EC 1118 (not expired). I did not rehydrate the yeast. I put it in a cool room in the basement (that might be a bit too cold for fermentation to start so I put a space heater in the room which I will remove when fermentation begins. I don't have a thermometer).
Given that information, do you think I added the DAP too early? I know most people say add after 24 hours, but I've read just as many posts saying "just add with the yeast, it will be fine" but... There is no airlock activity after 39 hours and the DAP is my point of concern. I know no bubbles in the airlock doesn't necessarily mean no fermentation but I don't believe there is a leak, the lid is tight, the bung is tight, and the airlock is tight in the bung (tight in the bung is a funny sentence). The bucket is not transparent so if no activity occurs on hour 72 I will remove the bung and take a hydrometer reading.
Would love to hear anyone's thoughts and opinions

Dr_Jeff

just give it time and leave it be

Dex-Pistol

Classic answer to the classic question. Cheers. Do you think I should remove the space heater from the room or keep it going until fermentation starts? It's just heating the room to around room temp, it's a very cold basement in Southern Ontario, Canada.

Dr_Jeff

Either way, if I remember correctly, EC-1118, the lower end of it's range is 52F or 55F degrees.
You know what temperature your space is, and go from there.
A quick Google search reveals - The fermentation characteristics of the EC-1118 — extremely low production of foam, volatile acid and hydrogen sulfide (H2S) — make this strain an excellent choice. This strain ferments well over a very wide temperature range, from 10° to 30°C (50° to 86°F) and demonstrates high osmotic and alcohol tolerance.