No offense to previous posters but I do not agree. Here's the correct advice.
1. You can feed a chondro weekly if it is defecating. In fact, if it is a male I would advise feeding it as much as it will eat because at some point it may go on a fast for as long as 9 months. Mine have.
2. They do prolapse - but one the size of yours probably won't. In fact, if it does you have a major issue.
3. They will drink out of a bowl. All of them.
4. All snakes need a thermal gradient. Chondros are no exception. Regulating body temperature dictates almost all of a snake's activities in the wild - why would you not try to replicate this in captivity?
5. I never use anything above a 25 watt red bulb when using it for a snake's "hot spot". If it is too hot (even a 25 watt bulb will generate a lot of heat) then move it so only half the bulb is shining in the tank.
6. The snake is not feeling secure and that is probably why it is not on the branch. I would tape newspaper all around the cage; all four sides. Cut a peep hole so you can look in. The snake ate for you so that is the biggest indicator that it is OK. Once the snake settles in then you can remove the newspaper.
7. Where they come from they get a lot of rain - but I believe it burns off quickly. You can't successfully keep that snake with no ventilation. If you cover the top of the cage with plexiglass you have to allow for some airflow. MUST.
8. Regarding temperature, for what it is worth, my snake room is in the low 80's... and the heaters are set so that the perch under the heaters are at 85F. They generally do not sit under the heat unless digesting a meal.
Hey... don't listen to me... I've only raised this female Wamena for five years... Here's a pic from yesterday morning. She weighs over 1400 grams.
This male Wamena for 5 years (he's the one that goes on 9 month fasts):
This male Aru for 5 years (pic from February 27):
...and this female Aru that I bought in November. She was 500 grams and filled with tapeworms and hookworms. Now she is 818 grams and parasite free (pic's from March 11):