 Extreme Boondocking, Heating |
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| Extreme Boondocking, Heating |
| pianotuna |
 Aug 10 2009, 06:49 PM
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#1
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 Advanced Member  Group: Members Posts: 1031 Joined: 7-January 07 Member No.: 10403  |
Hi all,
My RV is Kustom Koach based on the Ford E-450 chassis. It is equipped with a "Dometic" Briskaire Roof Ducted Air Conditioner c/w Heat Strip, and a "Hydroflame" DSI Furnace. I want to be able to use the heat strip and the furnace at the same time--however both are controlled by one thermostat on the wall--and it is not possible to have the switch in two positions at once. Does anyone have a "work around" for this situation? (I'd not object to adding a 2nd thermostat if that is what it takes. -------------------- Regards,
Don |
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| Trentheim |
Aug 10 2009, 07:28 PM
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#2
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 Advanced Member Group: Members Posts: 83 Joined: 13-November 07 Member No.: 17858 |
I gotta ask what you are needing to do that requires both at the same time. You got me perplexed. (You're not stress testing your solar panel solutions are you?)
I think you can use one thermostat, but I would suggest two just to keep better control over the temperatures of the system. -------------------- If you can't fix it with a hammer, you've got an electrical problem.
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| pianotuna |
Aug 10 2009, 07:56 PM
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#3
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Advanced Member Group: Members Posts: 1031 Joined: 7-January 07 Member No.: 10403 |
Hi Trentham,
I can't use one thermostat because the selection setting switch is furnace, airconditioner, off, and heat strip. It can't be in two positions at once. I want to be able to use both to increase the speed at which I can warm up the RV--and also to have the heat strip carry as much of the load as possible--setting the furnace to cut in a degree or two colder than the heat strip setting. -------------------- Regards,
Don |
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| gsbogart |
Aug 12 2009, 09:52 AM
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#4
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Advanced Member Group: Members Posts: 79 Joined: 10-January 06 Member No.: 5114 |
QUOTE(pianotuna @ Aug 10 2009, 09:56 PM)  Hi Trentham, I can't use one thermostat because the selection setting switch is furnace, airconditioner, off, and heat strip. It can't be in two positions at once. I want to be able to use both to increase the speed at which I can warm up the RV--and also to have the heat strip carry as much of the load as possible--setting the furnace to cut in a degree or two colder than the heat strip setting. Don I think you answered your own question when you said you wanted the heat strip to carry a load different from the furnace. The only way you can do that is with two thermostats. However, if you are looking for a 2 stage system, that is possible with a 2 stage heat cool thermostat, but you might need to run some additional wiring depending on what is in the back of the existing thermostat hookup. Most heat pump thermostats are 2 stage heat, one stage cool, and are available from home depot. Run the w1 terminal to the furnace along with a ground wire. Run W2 to the heat strip contactor, and the y1 to the cooling contactor on the A/C. Run the G to the fan contactor. The R terminal is for the transformer or control voltage input. You will not need the Orange or blue which go to the reversing valve in two types of wiring scenarios. |
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