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01-04-2012, 07:15 AM
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#1
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2 Rivet Member
2001 34' Limited S/O
Tallahassee
, Florida
Join Date: Dec 2008
Posts: 32
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Heat Pump
I live in north Florida and the temp was 18 last night, I cut the heat pumps on zone one and two on 61 to keep it warm. I checked it this morning and the heat pumps were not running and would not come on, but the furnace was running even though it was not set on the furnace. Any ideas what is going on? I would like the heat pumps to work in the freezing nights and not use up the propane. Any help would be appreciated. Thanks, Glen
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01-04-2012, 07:26 AM
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#2
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Rivet Master
Currently Looking...
Mantua
, Ohio
Join Date: Jul 2005
Posts: 7,062
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Heat pumps will cut off and the furnace will come on when it gets really cold. 20 here in Gainesville last night. jim
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01-04-2012, 07:39 AM
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#3
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Rivet Master
2008 27' Classic FB
Burkburnett
, Texas
Join Date: Jul 2010
Posts: 985
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The CCC automatically switches from Heat Pump to Furnace when the sensor on the roof senses 30°. This is to provide heat to the tanks and plumbing to prevent plumbing freezing up. It will switch back to Heat Pump operation around 38°. Heat pumps also decrease in efficiency as the temperature drops so there is a practical limit on how much warmth you can extract from outside air when it really gets cold outside. You could use an electric space heater, and some roof units accept optional heat strips, but remember, these don't circulate warm air under the floor.
__________________
AIR 47751
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01-04-2012, 07:39 AM
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#4
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4 Rivet Member
1999 34' Excella
NE Central
, Kansas
Join Date: Jul 2011
Posts: 321
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Your system worked perfectly as designed. The heat pump loses efficiency in the mid to upper 30's, and the furnace takes over.
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01-04-2012, 07:43 AM
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#5
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Rivet Master
2007 30' Classic
Oswego
, Illinois
Join Date: Jul 2010
Posts: 13,655
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Keep in mind a little coverd factoid in the manual. If you disconnect the battery, you must reprogram the CCC or else the automatic switchover to furnace will not happen. It's is now on my "every spring out of storage to-do-list".
__________________
-Rich-
"If the women don't find you handsome, they should at least find you handy." - Red Green
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01-04-2012, 07:54 AM
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#6
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Rivet Master
2008 27' Classic FB
Burkburnett
, Texas
Join Date: Jul 2010
Posts: 985
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Quote:
Originally Posted by dznf0g
Keep in mind a little coverd factoid in the manual. If you disconnect the battery, you must reprogram the CCC or else the automatic switchover to furnace will not happen. It's is now on my "every spring out of storage to-do-list".
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Some have noticed a loss of these special functions if the 12V was disconnected from the coach (batteries and converter) typically during storage. The button arrangement on the 5-button CCC and the newer model are different but the process is the same to perform a reset.
What isn't in mentioned in the book is when you release the buttons, the CCC screen will go blank. Simply select a mode and all will display once again.
__________________
AIR 47751
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01-04-2012, 08:08 AM
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#7
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Rivet Master
1974 Argosy 20
2014 20' Flying Cloud
Kooskia
, Idaho
Join Date: Jul 2009
Posts: 4,591
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Heat pumps can be designed with a higher "lift" (input to output temps) but the simple ones in RV units are not made that way. They have a cutout when it gets below their design temp, somewhere in the 35 degree range as I recall.
Home units generally work into the 20's, and special two stage units can work at even lower temps.
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01-04-2012, 08:11 AM
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#8
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Rivet Master
2007 30' Classic
Oswego
, Illinois
Join Date: Jul 2010
Posts: 13,655
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Quote:
Originally Posted by Silver Goose
Some have noticed a loss of these special functions if the 12V was disconnected from the coach (batteries and converter) typically during storage. The button arrangement on the 5-button CCC and the newer model are different but the process is the same to perform a reset.
What isn't in mentioned in the book is when you release the buttons, the CCC screen will go blank. Simply select a mode and all will display once again.
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Yup, do we really know when that change occurred? My 07 loses all it's memory if battery is disconnected.
__________________
-Rich-
"If the women don't find you handsome, they should at least find you handy." - Red Green
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01-04-2012, 08:13 AM
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#9
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2 Rivet Member
2001 34' Limited S/O
Tallahassee
, Florida
Join Date: Dec 2008
Posts: 32
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heat pump
Thanks everyone for the information
Glen
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01-04-2012, 08:28 AM
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#10
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Rivet Master
2008 27' Classic FB
Burkburnett
, Texas
Join Date: Jul 2010
Posts: 985
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Quote:
Originally Posted by dznf0g
Yup, do we really know when that change occurred? My 07 loses all it's memory if battery is disconnected.
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I was thinking I hadn't observed that, and assumed I had a newer CCC. I keep mine plugged in next to the house and will try to remember to disconnect the batteries and pull the plug when it gets colder to test the CCC functionality after a power loss.
__________________
AIR 47751
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