Hi breezedew,
Welcome to the Heartland Owners Forum. There's lots of useful information here along with a great bunch of friendly and helpful people.
Heartland's manuals are generic, covering travel trailers and 5th wheels, so there isn't a manual specific to Trailrunner. That being the case, you can download a current manual from the HeartlandRVs.com website.
Here's a link. Most, if not all of the info will still apply to prior year models.
We also have an extensive collection of
manufacturer manuals covering various appliances and components.
Our owners have written a number of
user guides and
troubleshooting guides that you may find helpful. They're based on actual owner experience and may save you a lot of time.
And of course, you can browse or search the forum 24x7 for answers to any questions you may have.
As I said, there's a great bunch of friendly and helpful people here, so feel free to ask questions. You're sure to get answers.