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Old 10-15-2019, 05:32 PM   #1
Join Date: Sep 2013
Location: NE Wisconsin
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Question on HEATING systems

I have a 2008 Bounder 38F DP with two roof A/C-heat pumps and two LPG furnaces. At times when I've fired up the heat at first I'll have my thermostat set for electric heat and when the heat comes on BOTH the LPG and the roof mounted heat pump kick on. If I have the T-stat set for gas, just the LPG fires up. Later, once the coach is warmed up it seems that just the heat pump comes on and cycles based on demand. I thought maybe it had to do with outside temps but it appeared to work the same last week when the outside temps dropped down in the 30's. Any help would be appreciated.

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Old 10-15-2019, 05:36 PM   #2
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If you set the thermostat 4 degrees above the temp in the coach the LP furnace kicks in.
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Old 10-15-2019, 06:15 PM   #3
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Plus if the heat pumps can't keep the set temperature, the furnace will kick on and run along with the heat pumps. So if the outside temps fall below 40 degrees or so, just switch over the furnace. If the temps are above 40 degrees but you need the warm the coach up, just set the thermostat for 3 degrees above current room temp. Once you hit that temp, raise the thermostat another 3 degrees, repeat until you hit your desired temperature.
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Old 10-15-2019, 06:19 PM   #4
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Originally Posted by Deep Water D View Post
If you set the thermostat 4 degrees above the temp in the coach the LP furnace kicks in.
if the temp set or desired is 3 or 4 degrees more than current room temp it will kick on both heat pump and the gas furnace

and in a few minutes the gas will kick off if temps have risen by a few degrees, each unit or brand has its own settings internally

also if just the heat pump is running and room temps fails to rise x degrees in x amount of time it will kick on gas to supplement.

if you want the gas furnace not to come on, try setting the desired room temp to 3 degrees above the actual room temp, then watch and see if room warms up. Then you can increase room temp gradually if desired

my air excell book has to much detail for the above. so thats it in a nutshell to
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Old 10-15-2019, 08:03 PM   #5
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Stevewitt. My 2006 Expedition works exactly the same way. We winter in Arizona. The mornings can be very chilly. We like the way the system works. But we add a small cube electric heater to keep the floor warmer and less noise from the heat pumps.
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ems, heating, heat

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