Since we will be using our coach on trips throughout the NY winter months, I called Entegra CS. I was told the same thing when I called customer service as what was stated in your email from Joyce. I actually called as asked how to I turn on my tank heaters....
I was told I don't have tank heaters; instead, Entegra uses basement heating. So I was instructed to:
1. Turn on my Auqahot to electric
2. Turn on thermostat to heat
3. Set zone 2 (in-floor) heat to "gas"
4. Set temp to desired temp (for me in upstate NY about, 40 degrees)
5. Turn on basement heat (located in the basement)
6. Set basement heat to desired temp (for me in NY, about 65 degrees)
7. Set Zone 1 and 3 heat to "gas"
8. Set zone 1 and 3 to desired temp (for me in NY, 50 degrees)
The Aquahot will run just fine on 20 amps as CS told me. (not 15 amps, I tried and kept tripping the house breaker)
For added NY winter security, belt and suspenders I call it, I also use antifreeze.
1. Open fresh water tank valve to drain fresh water tank
2. Open fresh water valves to drain lines to faucet
3. Open all faucets and drinking water knobs (there will be air in the line holding water in the washer
4. Pull house filter, drinking wear filter and water filter from fridge (put plug in fridge)
5. Close valves and faucets
6. Put winterization hose into gallon jug of antifreeze (have 4 gallons available)
7. Turn on pump and suck in antifreeze until the pump stops (keep tube in antifreeze)
8. Turn on washer (about 45-60 seconds), then his cancel to drain
9. Pour 4 cups of antifreeze into the washer
10. Pour antifreeze down all ptraps (sinks, shower, toilets)
11. I also pull out my fresh water hose and drain water as well, even though the basement heat and in-floor heat is on.