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Old 11-24-2013, 11:37 PM   #1
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Coach heat on the road

This has been discussed, sort of.........

We will be on the road Friday driving in temperatures from the teens to high 30s. I don't want to lose residual heat in the floors.

Should I leave the diesel burner on or can I switch to electric or is the engine heat mode sufficient? Will the batteries support the electrical needs of Aquahot and "gas" heat or do I need the generator on?
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Old 11-25-2013, 05:34 AM   #2
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If I recall your Anthem has the Engine Heat switch in the heating/cooling cabinet. The manual says by flipping it on your engine coolant will heat a loop in the Aqua Hot. If not hot enough I think the diesel burner is the best option. If the floor heat is the only zone demanding heat I don't think the burner will cycle much. I don 't know what the consumption rate is, but it has got to be pretty low. I run my Aspire LP burner for heat on the road. I've never tested it but I don't think the inverter(s) will power the Aqua Hot element.
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Old 11-25-2013, 07:41 AM   #3
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If I recall your Anthem has the Engine Heat switch in the heating/cooling cabinet. The manual says by flipping it on your engine coolant will heat a loop in the Aqua Hot. If not hot enough I think the diesel burner is the best option. If the floor heat is the only zone demanding heat I don't think the burner will cycle much. I don 't know what the consumption rate is, but it has got to be pretty low. I run my Aspire LP burner for heat on the road. I've never tested it but I don't think the inverter(s) will power the Aqua Hot element.

You should not use the Engine Heat switch on when travelling, as the engine's water pump will circulate heat FROM THE ENGINE to your Aquahot when traveling. The Engine Heat switch is to be used when sitting still with engine off, to send Aquahot heat back INTO the engine for better starting in very cold weather.

If the heat from the engine is insufficient, then turn the Burner switch on to run the diesel burner. I have never found this necessary, but then I have not been travelling in super-cold temperatures. Let us know how it works out.
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Old 11-25-2013, 09:10 AM   #4
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You should not use the Engine Heat switch on when travelling, as the engine's water pump will circulate heat FROM THE ENGINE to your Aquahot when traveling. The Engine Heat switch is to be used when sitting still with engine off, to send Aquahot heat back INTO the engine for better starting in very cold weather.

If the heat from the engine is insufficient, then turn the Burner switch on to run the diesel burner. I have never found this necessary, but then I have not been travelling in super-cold temperatures. Let us know how it works out.
MrUsa. I beg to differ.

From page 8-24 of 2014 Entegra Anthem manual...

The Engine Preheat mode will also circulate hot water through the system and can be used to heat your motor home while in transit. To utilize this heat mode, simply turn on the CCC (Comfort Control Center) thermostat and set the furnace Mode to the temperature you desire. In cold weather, you may need to use the Diesel Burner mode to bring the heating temperature up to heating temperature. The Engine Preheat mode will normally keep the motor home at a comfortable temperature. Note that, in extreme cold temperatures, the Diesel Burner may be needed to supplement heating of the antifreeze heating solution.
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Old 11-25-2013, 09:13 AM   #5
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I stand corrected. However, I have been driving with engine heat and burner switches off, and I still get heat via my Aquahot system. I imaging in very cold temperatures, it might be need.
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Old 11-25-2013, 01:37 PM   #6
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Marc, you are correct the pre heat sw. Does not have to be on to use the motor aide on the road. The pre heat sw. Is used to heat the engine from the aqua hot unit but is NOT required to heat the mh from the engine. Noel
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Old 11-25-2013, 02:37 PM   #7
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Marc, you are correct the pre heat sw. Does not have to be on to use the motor aide on the road. The pre heat sw. Is used to heat the engine from the aqua hot unit but is NOT required to heat the mh from the engine. Noel
That's what I thought Noel, but apparently not what the manual says. The manual could be in error, or maybe it is a matter of degree. Maybe more heat flows with the switch on. I don't know, because I've never needed more heat when driving.
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Old 11-25-2013, 02:47 PM   #8
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If you read the manual carefully it doesn't say the sw. has to be on for motor aide, only for engine pre heat. Noel
The engine preheat switch activates the engine preheat
pump, which draws the motor home’s engine coolant
through the boiler tank to heat it before returning it to the
engine block to transfer the heat there. Either the diesel burner
switch or the electric element switch must also be
activated in order for the engine preheat feature to function.
The engine preheat switch does not need to be activated for
the motor-aide feature to work and should be shut off when on the road.
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Old 11-25-2013, 07:43 PM   #9
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Which is what I said in the fisrt place. Thanks for backing me up!
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Old 11-25-2013, 07:48 PM   #10
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For me, the tangle associated with heating the floors and the engine and the coach is becoming increasingly confusing. Solution -- South of 30 degrees North latitude from November to March. Just sayin'
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Old 11-25-2013, 08:01 PM   #11
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The manual indicates the pre heat button AND the diesel burner must be turned on. Not the electric.
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Old 11-25-2013, 08:05 PM   #12
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FYI ...my zone one and two gas heat was blowing cold. After testing lines in basement and generator compartment, found kink in supply line behind kitchen cabinet drawer...snagged by slide. 22 degrees here and now completely toasty!
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Old 11-26-2013, 03:51 PM   #13
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The definitive answer on engine heat to the coach

Based on some of the posts I emailed Entegra CS to ask some questions about the Anthem/Cornerstone heating system to clarify (to me at least), how it all works. There were several emails so this is paraphrasing..

First, the engine water pump circulates hot coolant to the Aqua Hot anytime the motor runs and if you desire warm water to wash your hands or demand heat to the floor or a heater unit it will provide relatively warm heat. The manual says you must have the desired zone in "heat" to obtain the heat. Of course if it is really cold, the engine coolant can't do it all and either the diesel burner or the electric element running off the genny is required to heat the Aqua Hot enough. The overall summary is the engine coolant circulates into the Aqua Hot all the time.

Secondly, the Engine Preheat switch activates a circulation pump to move the engine coolant thru the hot Aqua Hot unit which warms the motor. Entegra says having the switch (pump) on while the engine is running is counterproductive (not hazardous) because the engine water pump is competing against the Aqua Hot circulation pump. I don't know if they pump against each other or what. It would seem that either pressurizes the coolant loop. Unless they flow thru check valves you would basically be running two pumps.

FYI. Now I understand the Aqua Hot/Engine relationship.
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