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Topic: Bay Heating (Read 1037 times) previous topic - next topic

Bay Heating

I have a couple of questions about bay heat.  In the water manifold compartment on right side, I have a small thermostat.  It is to the right of the water system control valves.  The thing is, the settings are from 0 to 50 degrees.  This confuses me.  What is this temperature referencing, and what is it controlling?  Also, as I understand it, the thermostat in the bathroom also controls the heat in the the storage bays.  Is this correct?
Thanks, Mike
Mike Brady
'97 U320 SE. #5137
'13 Honda Fit
Willow Springs, MO

Re: Bay Heating

Reply #1 –
What you pictured is the Thermostat for the bays. It would call for heat if lower than what you set it for. You must also leave heat left on inside to make it work. I think the Bathroom heat also blows into the bays, but then only if the bathroom calls for heat.
Eric & Nancy
1999 36 Ft. U320 WTFE
2016 GMC Terrain

Re: Bay Heating

Reply #2 –
YEs it is the bay heater thermostat. You need to have the bathroom on or that zone pump on the aquahot will not work.
2025 Wanderbox Outpost 32 on F600 Expedition Motorhome
2015 Born Free Royal Splendor on Ford 550 nonslide version  for sale
Former Coaches  covering. 360,000 miles
1999 34 U270
2000 36 U320
2001 42' double slide U320
2018 Jeep Rubicon

Re: Bay Heating

Reply #3 –
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.
Rudy Legett
2003 U320 4010 ISM 450 hp
2001 U320 4220 ISM 450 hp
1995 U320 M11 400 hp
1990 Granvilla 300 hp 3208T
Aqua Hot Service Houston and Southeast Texas

Re: Bay Heating

Reply #4 –
Recommended setting for the thermostat is 40 degrees.

- Roger Berke -

Re: Bay Heating

Reply #5 –
Thank you Rudy for the direct, clear explanation.  I've read so much conflicting info that I was not sure how any of that worked.  I'm going to bookmark this.
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Mark & Mary Benko
Former coach: 2005 U295 3823
Jeep Cherokee, Honda Fit

Re: Bay Heating

Reply #6 –
Quote from: Mark Benko –
Thank you Rudy for the direct, clear explanation.  I've read so much conflicting info that I was not sure how any of that worked.  I'm going to bookmark this.
Mark,

As usual, Rudy and Roger provided excellent expert advice regarding bay heat for the coaches with Aqua-Hot. Some of us in the "Poortravel Club" :P don't have Aqua-Hot systems. Your signature block indicates that you have a U295. Most of the U295 coaches have two propane furnaces rather than Aqua-Hot. On our U295, the rear furnace supplies heat to the "service entrance" bay and "water pump" bay via 2" ducts from the rear furnace.

I replaced the "open" registers for the rear furnace with adjustable registers. When we are in cold temperatures for several days, I normally close the registers partially to get more heat into the bays. IIRC, the specifications for the furnace call for at least two fully open 4" registers to assure sufficient air flow for proper operation of the furnace. I normally operate three partially open 4" registers to the "house" and two fully open 2" ducts to the basement. The adjustments have served us well for distributing some heat to bays containing water.
J D Stevens
1997 U295 CAI 36' Build #5085
2002 Subaru Outback
Motorcade 16869
Bellville, TX

Re: Bay Heating

Reply #7 –
Thanks for the info.
Mike
Mike Brady
'97 U320 SE. #5137
'13 Honda Fit
Willow Springs, MO

Re: Bay Heating

Reply #8 –
Quote from: J. D. Stevens –
Mark,

...Most of the U295 coaches have two propane furnaces rather than Aqua-Hot...

Not mine. But technically it is Hydro-hot.  Rudy has already advised me extensively and expertly on a repair/adjustment.
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Mark & Mary Benko
Former coach: 2005 U295 3823
Jeep Cherokee, Honda Fit