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 > Your search for posts made by 'smthbros' found 12 matches.

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RE: Atwood 8500 series furnace bench test on high limit switch

That switch should never need to open. If it does there is not enough air moving through/over the furnace. Absolutely true.
smthbros 03/01/21 11:46am Tech Issues
RE: Home dryer help needed

Appliances that remove air from a structure will require some sort of make up air. If the structure contains enough cubic feet of air and consequentially adequate infiltration, then you may be good to go. If not, then you should provide a dedicated source of make up air. The problem with small structures is not only the lack of existing air volume inside, but also the lack of sufficient infiltration sources. The issue with combustion appliances is the requirement for combustion air as well as potentially, make up air. Many mobile homes built over the last couple of decades have a make up air system included with the forced air heating system. This may be verified by checking the furnace blower compartment for an 'attic vent' in the top of the compartment. I can not speak to the adequacy of this vent.
smthbros 02/03/21 12:12pm Tech Issues
RE: CONDENSATION on windows in winter

If the air inside an RV is 60°F with 50% RH, then the dew point is near 40° and the specific humidity is near 39 grains per pound. If the outdoor conditions are 20° with 100% RH (ie it is snowing), then the dew point is near 20° and the SH is near 15.5 gr/lb. As indoor air is exchanged with outdoor air, the indoor air will become drier. FYI, there are online psychrometric calculators for any one interested doing their own.
smthbros 02/01/21 11:48am Travel Trailers
RE: hydro flame furnace problem

Once upon a time, pilot line and fittings were stock items in hvac trade. Maybe check with a local (old?) furnace guy?
smthbros 11/29/20 04:39pm Tech Issues
RE: Propane tank

https://www.homedepot.com/p/Worthington-20-lbs-Empty-Propane-Tank-With-Gauge-308551/300303119 https://www.ebay.com/itm/20LB-PROPANE-GRILL-TANK-SERVICE-VALVE-WITH-GAUGE-COUPLER-OPD-BBQ-OVERFILL-QCC-LP/191564387381?epid=1746624913&hash=item2c9a209435:g:hX4AAOSwPhdVN~YF
smthbros 11/24/20 11:16am General RVing Issues
RE: Finding a Mechanic for Suspension Issues: Southern Wisconsin

Bee Line Alignment in Janesville can likely help with suspension work, and maybe brakes also.
smthbros 10/01/20 11:36am Beginning RVing
RE: How cold should the air conditioning get the RV?

humidity is a very very small factor of the physics of heat exchange on the condenser part of the AC unit, but not enough to waste a sentence on. Humidity does matter as far as how cool will feel comfortable though. More humid = needs to be cooler. All my campers have had one AC unit and have been more than enough to cool, even in 113 desert sun, though they ere not big spaces either. So, what about humidity of the air across the evaporator?
smthbros 08/16/20 05:23pm Tech Issues
RE: How cold should the air conditioning get the RV?

The other factor to consider is humidity. The higher it is the less cooling you will get. less sensible cooling, still removing latent heat Since you mentioned "sensible cooling" and "latent heat", and that you agree that the only correct way to evaluate the performance of an air conditioner is to measure the amp draw on the compressor and compare that to the expected amp draw for the temperature it is operating at, perhaps you can explain how to account for "latent heat" removal with that method? As far as I have noticed on this forum, nobody else has been able to do so.
smthbros 08/15/20 06:45pm Tech Issues
RE: How cold should the air conditioning get the RV?

One key point is; AC units need to cycle. That's why in a couple places we camped this summer, we had to raise the inside temp to 75 instead of 73 a couple days. Why?
smthbros 08/12/20 04:43pm Tech Issues
RE: Need a 1/2" Propane Hose ASAP

Home Depot sells flexible gas line by the foot, or 50-100' rolls. They have all the parts you might need too. That gas line is only under 7 pounds of pressure. Are you referring to csst (corrugated stainless steel tubing)? If so, be sure to verify that rv use is allowed by the manufacturer.
smthbros 08/05/20 11:28am Tech Issues
RE: Furnace Short-Cycling

Regarding that restrictor inside the exhaust vent tube, which decreases the inside dimension of the tube to about 1/2" diameter, do you know it's purpose? When it's removed, no more short-cycling. Can I just remove that restrictor permanently? It sure seems like you have narrowed the problem to combustion ventilation. Sounds like the flame is smothering itself. One other thing to check is that that draft inducer blower wheel is secure on the motor shaft. As you may know by now, the draft inducer and air circulation blower share the same motor. As far as removing the restrictor, due to liability issues, you may want to contact the manufacturer.
smthbros 03/30/20 11:25am Tech Issues
RE: Dometic AC unit

A thermocouple is a device which generates electricity when subjected to a flame, most often from a pilot light.It is unlikely to be found on an rv air conditioner. The device mentioned in previous posts would likely be a thermister, which is a resistor whose resistance varies with the temperature it is subjected to. This may be found lodged into the evaporator coil of the air conditioner. Its purpose is to turn off the compressor when the condensation on the evaporator begins to freeze.
smthbros 03/30/20 10:49am Travel Trailers
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