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Topic: AquaHot AHE 100 2?s mixing valve - basement thermostat (Read 639 times) previous topic - next topic

AquaHot AHE 100 2?s mixing valve - basement thermostat

1. How sensitive is the adjustment of the mixing valve? At last service I exercised it and did not get it back to original position. I understand turning it CCW will give warmer water, but how much to turn it? 1/2 turn, 1 turn, ???
2. The remote thermometer in the P4 bay shows 62 degrees. During the past month I have adjusted this thermostat downward twice. It is now set with the pointer on "20". It seems the temperature in the bays has gone UP rather than down. How should I be adjusting that thermostat? Is it maybe not working? Is there a way to test it?

Thanks

Dick
Dick, '03 U320 40' Tag, 2 slides, Coach #6075
Full Timers
2009 Honda CR-V

Re: AquaHot AHE 100 2?s mixing valve - basement thermostat

Reply #1 –
Put a small mark on the black plastic knob using a silver Sharpie for reference, the start moving it 1/4 turn at a time to get back to where you were, then put a new mark for optimum temp.

I don't know about a P4 bay, but do you mean the little thermostat that controls the AquaHot fan in the bay where your water pump is?  Do you have AH?  If so, is it turned on?

Re: AquaHot AHE 100 2?s mixing valve - basement thermostat

Reply #2 –
Yes, the little thermostat where the water pump lives. The AquaHot is On. Right now it is 57 in there and 46 outside. I would like to get it adjusted so that it would be around 40 in that area.
I initially had the pointer on that black knob at 40 and now it's down to 20. I guess just keep turning it down?
Dick
Dick, '03 U320 40' Tag, 2 slides, Coach #6075
Full Timers
2009 Honda CR-V

Re: AquaHot AHE 100 2?s mixing valve - basement thermostat

Reply #3 –
Dick, it seems that the AH is doing its job and keeping the bay warm.

I'm not an AH expert but I thought the thermostat setting only dictates when the fan comes on, not the flow of heated coolant.
Also, I don't understand why the thermostat allows for settings of 20F and lower.  One would think that the fan(s) would come on
around 40F to keep things from freezing up.  It would seem that if the fan(s) come on at 20F it's then too late to prevent freeze-up
Rudy will have the answers if he's around.

You now have a 11 degree difference between the outside air temperature and the bay temperature, so my question is why do you
need it to be 40F in the bay?  Maybe when the outside air temperature is 51F the bay will be 40F.  LOL 

Re: AquaHot AHE 100 2?s mixing valve - basement thermostat

Reply #4 –
Quote from: Travelin' Man –
Dick, it seems that the AH is doing its job and keeping the bay warm.

I'm not an AH expert but I thought the thermostat setting only dictates when the fan comes on, not the flow of heated coolant.
Also, I don't understand why the thermostat allows for settings of 20F and lower.  One would think that the fan(s) would come on
around 40F to keep things from freezing up.  It would seem that if the fan(s) come on at 20F it's then too late to prevent freeze-up
Rudy will have the answers if he's around.

Jogged my memory - Rudy answered this one a while back for someone else Heat exchanger in wet bay question
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320

Re: AquaHot AHE 100 2?s mixing valve - basement thermostat

Reply #5 –
Once again.... Thank you Michelle.
That explains why it is warmer in the bays than I expected. We have been using the diesel burner a lot. I will now adjust the bay thermostat back to 40.
Dick
Dick, '03 U320 40' Tag, 2 slides, Coach #6075
Full Timers
2009 Honda CR-V