Aqua-Hot by a newbie

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Aqua-Hot by a newbie

April 17, 2014, 03:41:46 pm

Well we made it to Ky thru 3 days of thunder storms and hi winds. Was really kind of fun. Our new to us 2003 U320 38 f handled it with ease.

My question on the 38 ft there is only one thermostat in the head for the aqua-hot right? I will try to limit my questions on items with no manuals, Thanks, Tom

Re: Aqua-Hot by a newbie

Reply #1 – April 17, 2014, 04:52:39 pm

Tom, yes, usually there is only thermostat for a Dometic system of your vintage. If you have two or more zones, the thermostat can be switched for individual control. However you cannot set it to furnace on one zone and cool on another - both must be set the same.

Jim

Re: Aqua-Hot by a newbie

Reply #2 – April 17, 2014, 05:35:14 pm

I don't have AquaHot, but have seen a number of misc. controllers before. Have seen one in the basement, the bedroom, the bath, and the saloon.

Re: Aqua-Hot by a newbie

Reply #3 – April 17, 2014, 07:11:44 pm

The one in the bath is for that zone and the basement. Look at you dometic up front for the other zones.

Re: Aqua-Hot by a newbie

Reply #4 – April 17, 2014, 07:34:54 pm

Tom7, there is one on the bulkhead just behind the drivers chair, right below the cabinet.
I have the same coach so should be the same.

Richard B

Re: Aqua-Hot by a newbie

Reply #5 – April 17, 2014, 09:28:30 pm

Quote from: John S – April 17, 2014, 07:11:44 pm

The one in the bath is for that zone and the basement. Look at you dometic up front for the other zones.

I always refer to Rudy's explanation on how aquahot works for the basement and bathroom:

Quote from: Rudy – October 07, 2012, 03:44:46 pm

Yetch, Eric & John,

The bathroom thermostat controls heat in the bathroom only. The basement thermostat controls heat in the basement only.

Now the coolant loop supplied by pump 2 goes to the bathroom fan coil and to the basement fan coil. So if either the bathroom or basement thermostat calls for heat, pump 2 supplies hot coolant to both fan coils. ONLY the fan of the thermostat calling for heat turns on - not both fans.

With the bathroom thermostat set to as low a temp as is possible or even disconnected, the basement thermostat can turn on pump 2 and the basement fan.

Hope this helps you all.

Re: Aqua-Hot by a newbie

Reply #6 – April 18, 2014, 12:42:21 am

Tom7,
To specifically answer your question, yes there is only one thermostat for heating the bath area.

Re: Aqua-Hot by a newbie

Reply #7 – April 18, 2014, 06:40:16 am

Yes but the bathroom pump has to be turned on for the basement to get heat. The thermostat for that is in the monobloc compartment but even set high nothing will pump unless you turn on the bathroom.

Re: Aqua-Hot by a newbie

Reply #8 – April 18, 2014, 07:25:37 am

Thanks for the info. Tom

Re: Aqua-Hot by a newbie

Reply #9 – April 18, 2014, 07:49:34 am

My 03 works as Rudy explained. I can have basement heat without bathroom heat and bathroom heat without basement heat. Thermostats are independent but share a pump.

Re: Aqua-Hot by a newbie

Reply #10 – April 18, 2014, 07:55:18 am

But that zone has to be on to get basement heat. So if you do not have it on it will not pump. I had no heat in the basement or bath as the relay for that pump went off. They are on seperate thermostats but you have to have that zone on to get the pump to work. I have to have zone two on to get the basement to work. I can set it upstairs at 50 and never have the bathroom come on but it has to be on for the pump to work.

Re: Aqua-Hot by a newbie

Reply #11 – April 18, 2014, 08:48:36 am

The Aqua Hot heaters in pre-2003 Foretravels that do not have an electronic control board have the utility bay thermostat wired to directly turn on the utility bay fan coil and pump two. This thermostat which is located in the basement bay does not use any of the three zone relays located in the heater just below the fuse block.

No interior zones need to be on to have the utility bay active. But the Diesel Burner and/or Electric Element must be on or there will be no heated coolant available to heat anything.

Re: Aqua-Hot by a newbie

Reply #12 – April 18, 2014, 09:14:15 am

Thanks Rudy.

Re: Aqua-Hot by a newbie

Reply #13 – April 18, 2014, 09:20:41 am

John,

Your welcome as always.

All the best.

Re: Aqua-Hot by a newbie

Reply #14 – April 18, 2014, 10:23:47 am

Quote

. This thermostat which is located in the basement bay does not use any of the three zone relays located in the heater just below the fuse block.

To test my 99's basement heaters (one hidden behind the wet bay panel) I immersed the temp sensors in some ice water. Almost immediately, the fans came on and the compartment was bathed in warm air. Pretty neat.
jor

Re: Aqua-Hot by a newbie

Reply #15 – April 21, 2014, 07:18:45 pm

Just one more example of how valuable Foreforums really is.

Thanks!

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Aqua-Hot by a newbie

April 17, 2014, 03:41:46 pm

Re: Aqua-Hot by a newbie

Reply #1 – April 17, 2014, 04:52:39 pm

Re: Aqua-Hot by a newbie

Reply #2 – April 17, 2014, 05:35:14 pm

Re: Aqua-Hot by a newbie

Reply #3 – April 17, 2014, 07:11:44 pm

Re: Aqua-Hot by a newbie

Reply #4 – April 17, 2014, 07:34:54 pm

Re: Aqua-Hot by a newbie

Reply #5 – April 17, 2014, 09:28:30 pm

Re: Aqua-Hot by a newbie

Reply #6 – April 18, 2014, 12:42:21 am

Re: Aqua-Hot by a newbie

Reply #7 – April 18, 2014, 06:40:16 am

Re: Aqua-Hot by a newbie

Reply #8 – April 18, 2014, 07:25:37 am

Re: Aqua-Hot by a newbie

Reply #9 – April 18, 2014, 07:49:34 am

Re: Aqua-Hot by a newbie

Reply #10 – April 18, 2014, 07:55:18 am

Re: Aqua-Hot by a newbie

Reply #11 – April 18, 2014, 08:48:36 am

Re: Aqua-Hot by a newbie

Reply #12 – April 18, 2014, 09:14:15 am

Re: Aqua-Hot by a newbie

Reply #13 – April 18, 2014, 09:20:41 am

Re: Aqua-Hot by a newbie

Reply #14 – April 18, 2014, 10:23:47 am

Re: Aqua-Hot by a newbie

Reply #15 – April 21, 2014, 07:18:45 pm

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