Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > RV SYSTEMS AND TECHNOLOGIES FORUMS > RV Systems & Appliances
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 01-06-2010, 09:39 AM   #1
Senior Member
 
Max Hubrich's Avatar
 
Workhorse Chassis Owner
Join Date: Mar 2007
Location: Pikeville, NC
Posts: 1,774
Golly--- Heat pumps and furnace cold weather operation

We are experiencing unseasonably cold weather here in South Mississippi.

We've been down to 25 F twice now. The hose fittings and external water filters on other RV's are busting around here like popcorn.

I guess I've not used the combination of heat pumps (2) and the furnace before. I had weird things (so I thought) happening. I finally dug out my operators manual for the Duo-Therm control unit.

This is what I found and it might be of interest to some of you folks with similiar units- (I have the 5 button control- vs the 4 button):

"When in the HEAT PUMP mode, if the outside ambient temperature is measured to be below 30 F and the vehicle is equipped with a furnace connected to the Comfort Control Center, the control will automatically select the FURNACE operation and the HEAT PUMP will shut down.

When this happens, the AUX. HEAT and the HEAT PUMP indicators on the LCD will illuminate. Once the outside ambient temperature is measured above 38 F, the control will return to the HEAT PUMP operation and shut down the furnace if it is connected to the Comfort Control Center."

Golly, again--- It's all automatic!!

So there you are----- Hope this helps someone understand the system better than I did .
__________________
Max H,
2002 Newmar Mountain Aire, 37', 3778, W-22, 8.1 Vortac, Ultra Power upgrade, CAI (cold air intake), Taylor wires, colder plugs, Koni shocks.
Max Hubrich is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 01-06-2010, 10:03 AM   #2
Senior Member
 
GaryKD's Avatar
 
Newmar Owners Club
Join Date: Jul 2006
Location: Wellington, Florida
Posts: 13,599
Hi Max,
Does your coach actually work this way? I'm attending the Tampa RV Super Show next week. This may be the first time I get to check to see if this feature works.

Thanks for the post. I thought the only EMS in my coach was me.
__________________
Gary
2005 Newmar KSDP 3910 + GMC ENVOY XUV 37K lbs Moving Down The Road
The Avatar Is Many Times Around The USA
Nobody Knows Your Coach Like Somebody Who Owns One Just Like Yours
GaryKD is offline   Reply With Quote
Old 01-06-2010, 10:17 AM   #3
Senior Member
 
Join Date: Nov 2006
Location: Chalreston, S.C.
Posts: 288
Mine works automatically exactly as you described. I always have it on the heat pump setting since I am getting electricity included with the camp site fee. If the temperature drops below the heat pumps set temperature limit the gas furnace kicks in automatically to supplement. Pretty neat system.
buck62 is offline   Reply With Quote
Old 01-06-2010, 10:17 AM   #4
Administrator in Memoriam
 
Route 66's Avatar


 
Newmar Owners Club
Retired Fire Service RVer's
Spartan Chassis
Join Date: May 2000
Location: Newark, DE
Posts: 25,899
Max is correct, except I believe most rigs, mine included, switch to the furnace when the outside temps are in the high 30's.

The furnace is controlled by the zone 1 (front ac/hp) settings, so make sure you have the zone 1 temp set where you want it.

Also as temps approach 40*, the HPs will periodically go into the defrost mode, which sounds bad, but it's normal.
__________________
Adios, Dirk - '84 Real Lite Truck Camper, '86 Wilderness Cimarron TT, previously 4 years as a fulltimer in a '07 DSDP

Route 66 is offline   Reply With Quote
Old 01-06-2010, 11:52 AM   #5
Senior Member
 
Monaco Owners Club
Excel Owners Club
Join Date: Nov 2006
Location: Hangin' with Sacs and the Pins
Posts: 9,412
Gosh...I almost missed this post! Max - we have a similar system, but our system is set to switch to the furnace when the outside ambient temps are in the low 30s.

We also have a switch on our Control Panel that is called "System Heat". We will turn that switch on when we might experience cold weather. It does not kick on until the temps in the wet bay reaches into the very low 30's too. This turns the heater on in the wet bay to avoid freezing.

BTW...I used the foam pipe wraps on my water hose and also a styrofoam cap on the top of the spigot to avoid broken pipes when I was up in the snow.



__________________
MM
*MonacoMama with the 2 Pins & SacsTC Nearby*
*2007 Monaco Diplomat 40' SFT<>2006 Chevy VortecMax Toad<>2006 Buick Lucerne Leading the Way*
MonacoMama is offline   Reply With Quote
Old 01-06-2010, 11:57 AM   #6
Administrator in Memoriam
 
Route 66's Avatar


 
Newmar Owners Club
Retired Fire Service RVer's
Spartan Chassis
Join Date: May 2000
Location: Newark, DE
Posts: 25,899
It sounds like the Monaco system is different than the Newmar/Dometic system being discussed here.
__________________
Adios, Dirk - '84 Real Lite Truck Camper, '86 Wilderness Cimarron TT, previously 4 years as a fulltimer in a '07 DSDP

Route 66 is offline   Reply With Quote
Old 01-06-2010, 12:01 PM   #7
Senior Member
 
Monaco Owners Club
Excel Owners Club
Join Date: Nov 2006
Location: Hangin' with Sacs and the Pins
Posts: 9,412
Quote:
Originally Posted by Route 66 View Post
It sounds like the Monaco system is different than the Newmar/Dometic system being discussed here.
...yes & no...which is why I brought it up.. since this is not in the Newmar section - I felt folks should know that their system might be different. You might notice other members besides me answering are not all Newmar owners!



__________________
MM
*MonacoMama with the 2 Pins & SacsTC Nearby*
*2007 Monaco Diplomat 40' SFT<>2006 Chevy VortecMax Toad<>2006 Buick Lucerne Leading the Way*
MonacoMama is offline   Reply With Quote
Old 01-06-2010, 01:09 PM   #8
Senior Member
 
tmar10's Avatar
 
Fleetwood Owners Club
Appalachian Campers
Ford Super Duty Owner
Carolina Campers
Join Date: Jan 2008
Location: Four Oaks, NC
Posts: 502
Our system functions the same way. The furnace is ducted to the basement area while the heat pumps are ducted through the roof vents. Regardless of the need for heat in the basement areas, the heat pumps are not real effective as the temps fall toward freezing without the support of the furnace and heat strips.
__________________
Thomas & Betty w/Bailey & Gypsy (our fur-bearing masters)
07 Bounder 35e (F53)
07 Nissan Frontier or 2010 FLSTC toad
tmar10 is offline   Reply With Quote
Old 01-06-2010, 05:05 PM   #9
Senior Member
 
Max Hubrich's Avatar
 
Workhorse Chassis Owner
Join Date: Mar 2007
Location: Pikeville, NC
Posts: 1,774
Garykd,
My system works exactly the way I described it in the original post.

Route66,
Thanks for your concern. I didn't post the reason I entered this thread here- but it's because a widow, and friend of ours, ran out of propane and her rig got real cold. She has a Monoco Monarch SE. It has the exact same system as mine. When the ambient temperature went below 30 F yesterday morning she ran out of propane and had no source of heat except for two Pelonis units she had in her rig. When I went over to her coach I hooked up a full propane tank for her and then the furnace kicked in. later in the day as it warmed up the heat pumps came back on. I got into my manuals and operating booklets and our two systems work identical.

Her husband drove the brand new Monarch for 15 miles before he died. She lives in it full time and some other folks hooked an auxillary tank system into the coach's internal propane system. That's what "Bill", her husband, wanted. They moved out of a large 5th wheel where he had auxillary tanks before.

I just thought since hers is a Monoco and mine is a Newmar, some of the coaches we own, run similiar systems.

MM,
Hi,

By the way, since so many folks are letting their water run during the night and an above ground water pipe got a crack in it (from the freeze), we have low water pressure. Our Oxygenics shower head is great . I know I can run the 5.7 GPM water pump, if needed, but we are fine without it.

In summary, with a system such as mine, all one has to do is set the temperature you want on the heat pump at bed time, zone 1, make sure you have adequate propane, and you'll hear the furnace roar into life as it gets below 30 F degrees. That will put heat into the bays (as long as the basement fan switch is on) and keep you comfortable in the coach. Next day as things warm up the heat pump/s will come back on and the furnace will turn off automatically.

Cheers,
__________________
Max H,
2002 Newmar Mountain Aire, 37', 3778, W-22, 8.1 Vortac, Ultra Power upgrade, CAI (cold air intake), Taylor wires, colder plugs, Koni shocks.
Max Hubrich is offline   Reply With Quote
Old 01-06-2010, 07:22 PM   #10
Senior Member
 
bdaball's Avatar
 
Nor'easters Club
Workhorse Chassis Owner
Freightliner Owners Club
Join Date: Aug 2003
Location: MAINE, The way Life should be.
Posts: 1,092
Hey Max,
You sure would need both of those systems here now up at the HABAH!

I got to try that in the morning to see if mine works the same. Pretty sure I don't have to worry about if it's high 30's or low 30's. We haven't seen either one of those recently and looks like we won't either before we leave.
__________________
Tiffin Allegro Bus, 425 Cummins Freightliner XCR, Camp Freightliner, Acadia Denali, tow-N-4 Down, Blue-OX tow bar, TST Monitors, Seelevel II Monitors, Samsung Res Fridge, Progressive 50A-EMS, No Kids-No Pets, Full Time.
bdaball is offline   Reply With Quote
Old 01-07-2010, 03:38 AM   #11
Community Moderator
 
RV Wizard's Avatar


 
Country Coach Owners Club
Appalachian Campers
Gulf Streamers Club
Join Date: Mar 2000
Location: Chattanooga, Tn.
Posts: 12,061
The heat pumps are not actually measuring outside temperatures to bring on the auxiliary heat. The "freeze sensor" detect the evaporator coil is freezing up and causes the change over. This can happen at many different outside temperatures, depending on relative humidity and how long the unit has been in operation. These units do not have a defrost cycle like residential or commercial heat pumps; they just shut down and change over to auxiliary heat. For the auxiliary heat to work, you will need to have that system working, have fuel and the proper controls set if you have hydronic heating. Good luck and everyone stay warm.
__________________
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
RV Wizard is offline   Reply With Quote
Old 01-07-2010, 06:15 AM   #12
Administrator in Memoriam
 
Route 66's Avatar


 
Newmar Owners Club
Retired Fire Service RVer's
Spartan Chassis
Join Date: May 2000
Location: Newark, DE
Posts: 25,899
Quote:
These units do not have a defrost cycle like residential or commercial heat pumps; they just shut down and change over to auxiliary heat.
Mike, can you clarify?

When it's around 40* or lower, my heat pumps periodically stop blowing air, make strange noises and go through what I've always understood to be a defrost cycle.
__________________
Adios, Dirk - '84 Real Lite Truck Camper, '86 Wilderness Cimarron TT, previously 4 years as a fulltimer in a '07 DSDP

Route 66 is offline   Reply With Quote
Old 01-07-2010, 07:27 AM   #13
Senior Member
 
Tincup's Avatar
 
Join Date: Aug 2005
Location: Full Timers - Where ever we're parked.
Posts: 570
GAD ZOOKS the wonders of electronics never ceases to amaze me!
Our '05 Bounder works the same way
__________________
Paul - WA1IWH

Margaret - She who must be obeyed.
Tincup is offline   Reply With Quote
Old 01-07-2010, 10:45 AM   #14
Moderator Emeritus
 
Gary RVRoamer's Avatar


 
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 24,468
My Coleman heat pumps also seem to pause for awhile and then resume when it gets cold outside, e.g around 40. When that starts occuring frequently, I shut it down, so I don't know if it would activate my aux heat or not. I do know the t-stat doesn't switch on the aux heat (propane furnace in my case) until there is a 5 degree difference between the set temp and the actual interior temp.
__________________
Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is in the Ocala Nat'l Forest near Ocala, FL
Gary RVRoamer is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Cold weather strategy Snuggery Alpine Coach Owner's Forum 21 01-02-2011 10:57 PM
No furnace, thermostat, air or heat pumps lnwilson Newmar Owner's Forum 4 01-03-2010 11:55 AM
Dimension Inverter/Charger failure SteveG Winnebago Industries Owner's Forum 18 01-17-2008 01:20 PM
More Heat Pump Questions amanda_h Winnebago Industries Owner's Forum 21 11-27-2007 01:28 AM
Heat pump operation. Chinaberry Newmar Owner's Forum 18 10-26-2006 03:12 PM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 06:16 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.