Page 7 tells how to change battery types.
The float voltage will vary according to the temperature probe reading. You are using the temperature probe? If not the float is fixed on the 70 degree setting of 13.5 for wet or 13.6 for gel1. See page 20.
06 Hurricane 34FT WH W20 Chassis 8.1L 129K, Steersafe, Koni Shocks, DIY Trac Bar, Tri-Metric 2025RV Battery Monitor, 4-6V Batteries, Scan Gauge 2, Crossfires, 735W Solar Morningstar MPPT-60, KVH R5 In-Motion Sat, XM Radio, 07 Chevy Malibu Maxx Toad, Falcon 2, Brake Buddy, Escapee