It's pretty simple - just move the ferementer into a refrigerator for a few (3-4) days prior to bottling. For extra clarity, you can dose it with some gelatin after giving it a day or so to chill down first. Here's how you use the gelatin:
- Sprinkle 1 tbsp of gelatin crystals into 250 mL of boiled and cooled water at room temperature.
- Wait 20 minutes for the gelatin to "bloom."
- 10-15 seconds at a time, heat the water/gelatin mixture in the microwave until it reaches 150° F. DO NOT BOIL the mixture. You only want to heat it to 150° F.
- Stir to fully dissolve the gelatin. The water should be clear, maybe with a slight yellow tint and a little distorted when you look through it.
- Pour it into the chilled beer
You mentioned dry hopping, so I'm assuming you're making an IPA. With IPAs, I modify my procedure slightly in order to preserve as much hop aroma as possible, while still ending up with clear beer. The issue is that the gelatin can potentially strip hop oils out of your beer, so I dry hop
after undergoing my clarification protocol. Here's what I do with my IPAs:
1. Allow 3 weeks to fully ferment out.
2. Move into refrigerator to cold-crash.
3. 1 day later, add gelatin
4. 4 days later, rack to a 5 gallon carboy, add dry hops, and leave out of refrigertor to allow it to warm up
5. Wait 5-7 more days
6. Cold-crash again in refrigerator, but no gelatin this time
7. Wait 3-4 more days
8. Rack to keg and begin carbonating.
It takes slightly longer, but I end up with very clear beer and a prominent hop aroma.