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Old 01-28-2020, 12:36 PM   #1
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Floor heat 15 Anthem

Hi guys we just took ownership of a 15 anthem 44B. How do you turn on the floor heat? I've searched for a switch but can't find one. I'm sure there will be more questions so I appreciate those that have or had one of these classic coaches.
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Old 01-28-2020, 12:44 PM   #2
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Quote:
Originally Posted by toyzforme View Post
Hi guys we just took ownership of a 15 anthem 44B. How do you turn on the floor heat? I've searched for a switch but can't find one. I'm sure there will be more questions so I appreciate those that have or had one of these classic coaches.
On your thermostat in the 1/2 bath select zone 2 to gas heat slide the lower switch to heat, set the zone 2 temperature to around 73F, turn on the diesel and/or the electric element on the Aquahot and allow up to 24 hours for the floor to fully heat up.
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Old 01-28-2020, 12:58 PM   #3
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Don knows.... :-)

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Old 01-28-2020, 02:20 PM   #4
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On your thermostat in the 1/2 bath select zone 2 to gas heat slide the lower switch to heat, set the zone 2 temperature to around 73F, turn on the diesel and/or the electric element on the Aquahot and allow up to 24 hours for the floor to fully heat up.
Awesome thanks they didn't cover that in the walk around as everything we told them to fix two weeks prior wasn't done and the delivery guy was running around like a chicken with its head cut off lol.
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Old 01-28-2020, 02:26 PM   #5
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I generally set mine to 78 or so. 73 does not seem to me to give enough heat for the floor.

The electric heat source is only adequate in mild weather (50-ish). In cold weather you need to use the diesel heat.
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Old 01-28-2020, 02:43 PM   #6
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I generally set mine to 78 or so. 73 does not seem to me to give enough heat for the floor.

The electric heat source is only adequate in mild weather (50-ish). In cold weather you need to use the diesel heat.
Same experience.
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Old 01-28-2020, 03:13 PM   #7
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Floor heat 15 Anthem

Note where the thermistor is for zone 2. Not sure which year they switched but it went from close to the floor to mid level. So if it is low, both heat and ac temperature settings will be exaggerated, set extra high for heat and extra low for cool. After some experience, you will find the sweet spot. But I guess the key is zone 2 for floor heat.
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Old 01-29-2020, 07:47 AM   #8
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Note where the thermistor is for zone 2. Not sure which year they switched but it went from close to the floor to mid level. So if it is low, both heat and ac temperature settings will be exaggerated, set extra high for heat and extra low for cool. After some experience, you will find the sweet spot. But I guess the key is zone 2 for floor heat.
Yes on my 15 I looked and it's near the floor
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Old 01-29-2020, 08:02 AM   #9
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Ok this doesnt seem to work. When I change zone 2 to gas heat it changes all the zones to heat. Am I not able to have zones 1 and 3 on AC and floor heat on. Is thermostat in basement for the basement only
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Old 01-29-2020, 08:28 AM   #10
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Floor heat 15 Anthem

I have a much older system but was always told the heat pumps/ A/C air can’t be on with the floor registers which I assume are on the same rules as the hydronic floor heat. They must all be on the same type of heating or cooling . The system won’t allow air conditioning and heating at the same time.
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Old 01-29-2020, 08:39 AM   #11
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This is what I use as operating and info on system:

RV COOLING & HEATING SYSTEMS

THERMOSTAT NOTES

ZONES

Zone 1 is the front of the coach. Cooling is from the front A/C unit. Heat is from either the front heat pump (electric mode) or forced air using the AquaHot system (gas mode).

Zone 2 is the middle of the coach. Cooling is from the mid A/C unit. Heat is from either the mid heat pump (electric mode) or in-floor heating using the AquaHot system (gas mode). (all the tiled flooring aft of the front seats)

Zone 3 is the rear of the coach. Cooling is from the rear A/C unit. Heat is from either the rear heat pump (electric mode) or forced air using the AquaHot system (gas mode).

Zone 4 is forced air heat to the basement, controlled by a separate thermostat in the basement that has only temperature select and an on/off switch. It uses AquaHot for heating, and has no cooling mode.

There are 3 sources of environmental heat to the coach… fireplace, heat pumps, and AquaHot.

FIREPLACE

The fireplace is a 1500w electric heater, and requires AC power from either shore power or the generator. Running the generator only to use the fireplace is inefficient.

HEAT PUMPS

The 3 rooftop air conditioners run in reverse to heat the coach and are ineffective at lower outside air temperatures. They begin to lose efficiency approaching 45F, and will stop providing heat altogether at 40F and below.

A heat pump for Zone 1, 2, or 3 is selected at the thermostat using the ‘electric’ mode. Heat pumps require AC power from either shore power or the generator. They are not as powerful as the AquaHot system, and are inefficient powered by the generator. They are best suited when connected to shore power and when the OAT is above 40F.

AQUA HOT SYSTEM

The AquaHot boiler provides heated circulating fluid to forced air registers in Zones 1, 3, & 4 (front, rear, basement), and to the in-floor heat system using Zone 2. AquaHot heat for Zones 1, 2, or 3 is selected at the thermostat using the ‘gas’ mode.

Fluid in the AquaHot boiler is heated using an electric heater (~ 2k BTU), or a gas burner (~ 50k BTU), or both. ‘Electric’ and ‘Burner’ select switches are in the mid-bath (near the thermostat). The ‘Electric’ heater requires AC power from either shore power or the generator. The gas ‘Burner’ uses diesel fuel. When the engine is running, engine heat is automatically routed to add heat to the AquaHot boiler.

The ‘Engine Preheat’ switch sends AquaHot fluid to the engine block for pre-heating. This switch should remain off except to pre-heat the engine when starting in very cold temperatures.

***On diesel-fired Aquahots turn on zone 2 and gas heat while traveling and you will get free heat from the engine while traveling. You do not have to turn on the diesel boiler or the electric switch to get this free heat. This will keep your floors from cooling down while traveling.

As noted, the Aquahot electric heating element provides only a small amount of heat and will suffice only down to 50 or 55 degrees. In colder temperatures use the heat pumps (electric heat setting on zones 1 through 3) to heat the coach if plugged in and the outside temps are above 40F. This avoids the use of diesel fuel. If not plugged in or temps below 40F use the diesel burner. It will keep you comfy regardless of the outside temperature.

In mildly cold temperatures when plugged in, use heat pumps on zone 1 and 3 and use gas heat setting on zone 2 with just the electric switch on, not the burner. The zone 2 setting takes the chill off the floor using electricity not diesel.
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Old 01-29-2020, 01:21 PM   #12
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Awesome breakdown. Thanks. My Newmar didnt have aquahot so this system is all new
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Old 02-04-2020, 05:48 AM   #13
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Floor Heat won't work

Well after messing around trying to get the floor heat to come on, I discovered that the pump is not working on the aquahot. Great I wished I would have seen this before I left the dealer with it. Now I have to deal with the extended warranty company
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Old 02-04-2020, 06:13 AM   #14
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Well after messing around trying to get the floor heat to come on, I discovered that the pump is not working on the aquahot. Great I wished I would have seen this before I left the dealer with it. Now I have to deal with the extended warranty company
The 14's and 15' had bad pumps from Aqua Hot. If you have the square GRI pumps, the 105's were recalled. They were replaced with 108's which were not much better. The replacement pumps are a round Buhler pump. If any of the pumps are GRI's expect to have problems with all of them. The change over with the adapter kit runs about $200. There have been posts on making you own kit and finding motors outside of Aqua Hot for less money. If you have any of the GRI pumps, look to replace all of them, as the problem will continue. There are 4 total with the one on the back side of the aqua hot.

Aqua Hot was not retroactive on the bad bumps, 2 year warranty, that was it. Sorry for the problem, those of us that had Classics have all been there.
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