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Newell Gurus
AquaHot operation - Printable Version

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+--- Thread: AquaHot operation (/showthread.php?tid=412)


AquaHot operation - rheavn - 12-26-2012

I was reading over on Roger Berke's forum(he's a guru member). He was explaining how the AquaHot unit heats the water and the coach interior that I found interesting. The water is heated by sending the water through copper coils that wind through the coolant tank and then routed out to the faucets. In contrast the coach is heated by routing the heated coolant from the coolant tank through the heat exchangers and then blown into the coach using fans.

Hope this clears up any confusion......................

RE: AquaHot operation - RussWhite - 12-26-2012

Steve,

I thought the copper coils containing potable water were routed around the coolant tank, but you say "through the coolant tank". Please help me understand what you mean.
Thanks, Russ

RE: AquaHot operation - rheavn - 12-27-2012

Russ,
Let me try to clarify and correct. I was improperly calling the coolant tank everything inside the stainless steel coolant box. I should have said around and not through the coolant tank that is inside the stainless steel box. Quoting Roger, "The hot water is heated by sending the water through a continuous copper loop that is wrapped around the outside of the hot boiler tank, then through mixing valve (anti-scald device) to send constant 120 degree water to the inside of the coach."

Hope this clarifies....................

RE: AquaHot operation - les korcala - 01-01-2013

(12-27-2012, 04:09 AM)rheavn Wrote:  Russ,
Let me try to clarify and correct. I was improperly calling the coolant tank everything inside the stainless steel coolant box. I should have said around and not through the coolant tank that is inside the stainless steel box. Quoting Roger, "The hot water is heated by sending the water through a continuous copper loop that is wrapped around the outside of the hot boiler tank, then through mixing valve (anti-scald device) to send constant 120 degree water to the inside of the coach."

Hope this clarifies....................

I had chance to see the photo of the opened tank ( A Hot Co.had one opened the Aqua Hot Box ) inside of teh AH Box tyere is tank is coiled with two sets of copper tubes ( in my case we have two elements 1700 & 4000 watts ) and each cooper pipe was coiled around the barrel shape tank )some 180 feet of it, that is lot of great heat circulation of coolant! in our case was the 4000watts element and its pipe developed rusty like holes.

RE: AquaHot operation - Bob Standeford - 06-14-2013

I'm on the road to Canada, my AQ comes on, but when I flip the switch to off for traveling the burner will stop but something keeps running, like the blower or fuel pump. I removed all of the fuses and it still ran. I turned the big 110 breaker off, still ran. Any suggestions. Thanks

RE: AquaHot operation - folivier - 06-14-2013

I thought it was 12 volt powered?
Could one of the relays be stuck on? Easy to pull each one to see if the pumps stop when you pull them.

RE: AquaHot operation - Chester Stone - 06-14-2013

Could it be the pump that uses AquaHot water to heat the engine?

RE: AquaHot operation - Trainer - 06-14-2013

Chester,

The engine pre-heat pump in the Aqua Hot only pumps engine coolant, not Aqua Hot coolant. The engine coolant is circulated through coils (just like the fresh water heating coils) to pick up heat from the Aqua Hot coolant and warm the engine for starting in cold weather.

Conversely, while driving down the road, the engine driven coolant pump will circulate hot engine coolant through the engine pre-heat coils heating the Aqua Hot coolant. So you can heat the coach front to back by setting the interior thermostats to heat any zone you need warmed up. Really frigid conditions would need the diesel burner to help the hot engine coolant provide enough heat to warm up the interior.

Bob,

With switches off and fuses pulled, I do not know of what would be running in the Aqua Hot heater.

The basement thermostat will command pump 2 and the basement fan coil with the interior turned off. But I would expect it to not work with fuses pulled.

RE: AquaHot operation - Bob Standeford - 06-15-2013

I called Newell and they told me that there is a internal fan that stays on to cool the fire chamber if it is too hot after heating. I did notice my temp was up to 207 before I turned it off. I don't recall it going that high before, could be the high limit switch is going bad on me.

RE: AquaHot operation - Trainer - 06-15-2013

Bob,

The diesel burner blower motor will stay on 2 to 3 minutes after the control unit (silver brain box) turns the fire off. This shut down purge cools the combustion system and flushes the system with fresh air. The purge cycle is a timed event and not controlled by a temp sensing thermostat. The blower could be described as an internal fan as it is inside of the burner.

The control unit stops the fire when the control thermostat reaches set point, high limit thermostat opens or you turn the diesel heat switch off inside the coach.

There are no other installed fans to cool the heater provided by Aqua Hot. Neither Ashley's or Chappell's heaters have an additional Newell installed fan as I have had eyeballs on both of those heaters.

The high limit thermostat is set well above 207 degrees F so it is not going bad. The control thermostat can fail closed and heat the heater up to the high limit set point. You would know the control thermostat had failed closed since all heating with the diesel burner would stop till you manually reset the high limit thermostat.

I do not recall if your 12 vdc high limit thermostat is resettable. There will be a reset button on it if it can be manually reset.