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Old 11-27-2016, 06:15 PM   #1
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Greyhawk 2016 D/S heat

Just fired up the heating system on Gennie power for a quick warm up.
I put thermostat on Electric heat, a/c which came on right away.
But the house propane came on also??
Should this happen? I would like to use A/C heat when plugged in to save propane.
Anyone have a idea if this is normal.
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Old 11-27-2016, 07:36 PM   #2
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Does your rig have a heat pump A/C or just an electric heat strip?

My unit has heat pumps and they will not work in the electric mode below 42-44 degrees. But as yours did, when it is too cold and I try electric heat mode the A/C fan runs but the regular furnace comes on.

I believe mine will also run the furnace even if it above 44 if the inside temperature is quite low. It seems to have logic built into it that causes it to warm up as quickly as possible.
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Old 11-27-2016, 07:53 PM   #3
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In looking at a 2016 brochure it does appear your unit is a heat pump. What was the outside temperature when you were trying this?
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Old 11-27-2016, 07:53 PM   #4
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Smile

Thanks for the reply, Not sure if it is a heat pump or heat strips
on The Grayhawk 31 D/S.
I will get the books out in A.M before we head out on a short trip.
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Old 11-27-2016, 08:26 PM   #5
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If the difference between the room temperature and the set temperature is 5 degrees or greater, the propane furnace will come on. Set the temperature you want no greater than 4 degrees above room temperature and the furnace will stay off. I do this when I don't want to use my propane. You'll just have to keep an eye on room temperature and keep moving the set temperature up up a degree at a time until the room gets to where you want it.

Another caveat to this is that if the set and room temperatures difference exceeds 4 degrees three times, the heat pump will be locked out for 2 hours. No, I didn't make this up. It's all in the manual.
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Old 11-27-2016, 08:39 PM   #6
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Don
Seems like you have the answer, it was 54 outside and thermostat was set to 65.
I will try the slow method with the 4 degree above in A.M.
The heat pump seems to draw more power than A/C .
It kicked out Gennie breaker when I started Microwave at the same
time.
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Old 11-27-2016, 09:13 PM   #7
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Here's a link to the thermostat manual just for grins . Don't hurt yourself trying to figure it out.

http://liferebooted.net/life-reboote...at%20Guide.pdf.

Yeah, the heat pump and microwave are the biggest draws in the RV as you've already figured out. I've run the MW and A/C at the same time but haven't tried the heat pump at the same time. If your water heater was on at the same time that's a pretty big draw also. Those three will definitely trip the main breaker.
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Old 11-28-2016, 06:16 AM   #8
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Quote:
Originally Posted by katiedog View Post
Don
Seems like you have the answer, it was 54 outside and thermostat was set to 65.
I will try the slow method with the 4 degree above in A.M.
The heat pump seems to draw more power than A/C .
It kicked out Gennie breaker when I started Microwave at the same
time.
Katiedog
Heatpump and a/c have same current draw. Both functions use same compressor and fan(s).
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Old 11-28-2016, 01:47 PM   #9
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Quote:
Originally Posted by katiedog View Post
Don
Seems like you have the answer, it was 54 outside and thermostat was set to 65.
I will try the slow method with the 4 degree above in A.M.
The heat pump seems to draw more power than A/C .
It kicked out Gennie breaker when I started Microwave at the same
time.
Katiedog
Wow - I learned something too today!
I was wondering why my propane furnace came on too.
Thanks!


We have a 2016 31FK and according to the Coleman Mach 8 manual, mine has heat strips. I think I verified that when we were camping in 30*F weather. The electric heat kept the coach nice and toasty.

I don't think a heat pump would have worked that well at those low temps.


We were plugged into the 30A pedestal in the campground.
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