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01-03-2014, 04:31 AM
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#57
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Senior Member
Monaco Owners Club
Join Date: Jan 2003
Location: Knoxville, TN, USA
Posts: 3,995
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Quote:
Originally Posted by ShapeShifter
Hmmm... I've got lots of old mini leaded LEDs, guess I need to take a switch apart and see what it would be like to replace the incandescent bulb. It sounds like a pain, so I hadn't bothered to explore that avenue.
After posting yesterday, I found a switch on DigiKey that looked promising, but alas it's a nom-stocked item. :(
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Adam,
Once you take one of the switches apart you will see why you need the 3mm leaded LED with internal resistor. That is why I purchased these:
Bob
__________________
Bob and Pam
2022 Quantum JM31
2023 Colorado Z71
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01-03-2014, 04:46 AM
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#58
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Senior Member
Monaco Owners Club
Join Date: Jun 2012
Location: Merritt Island, FL
Posts: 1,742
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All three of my tanks have heating pads. All three tanks are in the water bay.
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01-03-2014, 07:36 AM
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#59
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Senior Member
Monaco Owners Club Holiday Rambler Owners Club
Join Date: Feb 2010
Location: Buffalo, NY
Posts: 1,632
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Quote:
Originally Posted by Pusherpilot
I don't think I have a snap disc in the inverter bay. There is a bay heat exchanger from the AquaHot in there mounted on the ceiling over the inverter.
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Interesting. I don't have any experience with AquaHot, so I don't know how it affects things. Is there still a cooling exhaust fan on the end wall of the compartment? Mine (and Bob's) look like this: (I'm using Bob's picture since it's much better than the one I took with my phone, I hope he doesn't mind...)
If you have that fan, I'll bet you do have a snap switch hidden somewhere. Trace that cable going off to the right above the auto gen start module. If no fan, then you probably have no snap switch.
Unless the AquaHot can circulate chilled water to cool the inverter (AquaCold? ) I would think that you would still have the cooling fan in there to handle the heat generated when charging or inverting. But there's obviously differences between the various models and years, so who knows?
Quote:
Originally Posted by Pusherpilot
I'd love to have a BSD or theory of operation for that heater, there's a lot in there that isn't needed IMHO.
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Yep, lots more than needed. For the way Monaco is using it, all that's really needed in there is a relay to switch the high power lead when the trigger lead is active. You could probably pull all of that circuitry out of there and replace it with a high current automotive relay and everything would work fine. But that's an advanced project that shouldn't be done unless you really know what your doing. (From your comments, it sounds like you might be able to easily handle that, but I can't make that determination remotely. )
Quote:
Originally Posted by nodine
Once you take one of the switches apart you will see why you need the 3mm leaded LED with internal resistor.
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My stock of mini LEDs are almost that size. I measure 0.123 diameter while the datasheet lists 0.114. The difference is less than two sheets of paper. Hopefully that's close enough.
Quote:
Originally Posted by Gorlininc
All three of my tanks have heating pads. All three tanks are in the water bay.
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Well, there goes that theory!
__________________
Adam and Sue, and a pack of little furballs
2007 Holiday Rambler Endeavor 40PDQ Limited Edition - Cummins ISL 400
2013 Ford F-150 FX4 toad - USGear Unified Tow Brake, Roadmaster Blackhawk II Tow bar, Blue Ox baseplate
Home base near Buffalo NY, often on the road to a dog show
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01-03-2014, 10:25 AM
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#60
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Senior Member
Monaco Owners Club
Join Date: Jul 2001
Location: SD
Posts: 1,022
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Quote:
Originally Posted by Gorlininc
All three of my tanks have heating pads. All three tanks are in the water bay.
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The waste tanks are in the water bay. The fresh water tank is in a compartment forward of that by about 10ft and has two pads, as near as I can tell. I can't find any wiring for any pads in the water bay but the cargo heater is supposed to keep that area warm.
Ron
__________________
2004 HR Imperial
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01-03-2014, 10:44 AM
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#61
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Senior Member
Monaco Owners Club
Join Date: Jul 2001
Location: SD
Posts: 1,022
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Quote:
Originally Posted by ShapeShifter
Yep, lots more than needed. For the way Monaco is using it, all that's really needed in there is a relay to switch the high power lead when the trigger lead is active. You could probably pull all of that circuitry out of there and replace it with a high current automotive relay and everything would work fine. But that's an advanced project that shouldn't be done unless you really know what your doing. (From your comments, it sounds like you might be able to easily handle that, but I can't make that determination remotely. )
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The heater uses a relay on the board to switch the power to the heater element. I have a new fan coming for it. When I get it all together again I'll reinstall it and check for proper operation. If it doesn't work then I'll pull it and re-engineer it to a simpler configuration. I'll have to put a thermal fuse in and figure a way to keep the fan on after the element goes off to give it a cool down but that shouldn't be too hard. There is a thermostat on the heater element assy that is in line with the fan but it is showing continuity while it's dead cold so it's either failed or has some other function other than as a cool down device. I suspect that all the other circuitry is for another configuration of heater that has switches and a temp potentiometer on it. The cargo heat unit looks a lot like one of the other space heaters mentioned here so this one may be a dumbed down version of that one.
Ron
__________________
2004 HR Imperial
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01-03-2014, 10:52 AM
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#62
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Senior Member
Monaco Owners Club Holiday Rambler Owners Club
Join Date: Feb 2010
Location: Buffalo, NY
Posts: 1,632
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Quote:
Originally Posted by Pusherpilot
There is a thermostat on the heater element assy that is in line with the fan but it is showing continuity while it's dead cold so it's either failed or has some other function other than as a cool down device.
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Could that be the overtemperature safety device, which opens if too hot, being used instead of a thermal fuse?
__________________
Adam and Sue, and a pack of little furballs
2007 Holiday Rambler Endeavor 40PDQ Limited Edition - Cummins ISL 400
2013 Ford F-150 FX4 toad - USGear Unified Tow Brake, Roadmaster Blackhawk II Tow bar, Blue Ox baseplate
Home base near Buffalo NY, often on the road to a dog show
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01-03-2014, 06:25 PM
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#63
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Senior Member
Monaco Owners Club
Join Date: Jul 2001
Location: SD
Posts: 1,022
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Quote:
Originally Posted by ShapeShifter
Could that be the overtemperature safety device, which opens if too hot, being used instead of a thermal fuse?
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It could be but the pix posted here showing the thermal fuse also shows the thermostat.
Ron
__________________
2004 HR Imperial
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01-03-2014, 07:06 PM
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#64
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Senior Member
Monaco Owners Club Holiday Rambler Owners Club
Join Date: Feb 2010
Location: Buffalo, NY
Posts: 1,632
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Hmmm... then we truly have a mystery...
__________________
Adam and Sue, and a pack of little furballs
2007 Holiday Rambler Endeavor 40PDQ Limited Edition - Cummins ISL 400
2013 Ford F-150 FX4 toad - USGear Unified Tow Brake, Roadmaster Blackhawk II Tow bar, Blue Ox baseplate
Home base near Buffalo NY, often on the road to a dog show
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01-04-2014, 04:13 AM
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#65
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Senior Member
Monaco Owners Club
Join Date: Jan 2003
Location: Knoxville, TN, USA
Posts: 3,995
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Quote:
Originally Posted by Pusherpilot
It could be but the pix posted here showing the thermal fuse also shows the thermostat.
Ron
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Ron,
Most likely a previous owner removed the thermal fuse.
Bob
__________________
Bob and Pam
2022 Quantum JM31
2023 Colorado Z71
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01-04-2014, 04:15 AM
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#66
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Senior Member
Monaco Owners Club
Join Date: Jan 2003
Location: Knoxville, TN, USA
Posts: 3,995
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Quote:
Originally Posted by ShapeShifter
Interesting. I don't have any experience with AquaHot, so I don't know how it affects things. Is there still a cooling exhaust fan on the end wall of the compartment? Mine (and Bob's) look like this: (I'm using Bob's picture since it's much better than the one I took with my phone, I hope he doesn't mind...)
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Adam,
I don't mind at all.
Bob
__________________
Bob and Pam
2022 Quantum JM31
2023 Colorado Z71
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01-04-2014, 02:05 PM
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#67
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Senior Member
Monaco Owners Club
Join Date: Jul 2001
Location: SD
Posts: 1,022
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Quote:
Originally Posted by nodine
Ron,
Most likely a previous owner removed the thermal fuse.
Bob
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I'm the original owner.
Installed the new fan this a/m and plugged it in. The fan stays off even with the system heat sw on and doesn't come on till I freeze the snap disc. The fan comes on but there is no heat. I'll have to get back into it again and re engineer it or figure out how it works and find the bad component. I all else fails I'll buy the look alike and hard wire it in.
Ron
__________________
2004 HR Imperial
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01-05-2014, 04:17 AM
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#68
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Senior Member
Monaco Owners Club
Join Date: Jan 2003
Location: Knoxville, TN, USA
Posts: 3,995
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Quote:
Originally Posted by Pusherpilot
..I'm the original owner. ....
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Ron
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Well that blows that theory out of the water!
Bob
__________________
Bob and Pam
2022 Quantum JM31
2023 Colorado Z71
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01-05-2014, 05:34 AM
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#69
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Senior Member
Monaco Owners Club
Join Date: Jun 2012
Location: Merritt Island, FL
Posts: 1,742
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What heater did you buy? Some heaters have an internal thermostat that turns on the heater coils at a certain temp. Some heaters have their own thermostat. Some heaters have no internal thermostat and the fan and heater coils go on together.
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