Reply
 
Thread Tools Search this Thread Display Modes
 
Old 08-13-2014, 11:22 PM   #1
1 Rivet Member
 
2014 25' FB Flying Cloud
Monroe , Washington
Join Date: Apr 2014
Posts: 6
Parasitic electrical flow

I was talking to someone at a campground this week and complaining about my batteries running down to 50% of capacity in 3 days. He happened to have a Fluke clamp-on DC ammeter. We opened the battery compartment and put the ammeter on the positive lead and measured a few conditions. It turned out that the refrigerator draws 1 ampere all the time when running on LPG. I think that there is a LPG solenoid that has to be activated.

The LED reading lights in the bedroom draw 0.1 ampere each.

I just bought a clamp-on for my own use. I want to run some more tests when it arrives and I will post the results.
__________________

__________________
2014 FC 25' FB
2014 Ford F-150 XLT 4x4 EcoBoost V6
EQ WD Hitch
waltc is offline   Reply With Quote
Old 08-13-2014, 11:47 PM   #2
Rivet Master

 
1986 31' Sovereign
Miami , Florida
Join Date: Feb 2004
Posts: 1,651
Blog Entries: 13
Your propane detector is hard wired as well and always drawing some power.

Mike
__________________

__________________
Old (usually dirty) Nissan Titan
Old (enhanced with "male pattern baldness") Sovereign
Young, lovely bride
Goofy dog, dismissive cat
n2916s is offline   Reply With Quote
Old 08-13-2014, 11:58 PM   #3
4 Rivet Member
 
SSquared's Avatar
 
2013 25' FB Flying Cloud
Longmont , Colorado
Join Date: Jan 2012
Posts: 497
Fridge current draw on propane

Our fridge also draws nearly an amp when running on propane.

We have a 2013 25FB. The documentation for the fridge shows that there is a small heating element that runs on 12V. It's not for the cooling system, it is for fighting condensation. I think this heater is near the door, but I am not sure.
This heater draws about 1/2 an amp.

The manual implies it runs as needed, but I think it runs pretty much all the time.

We have identified the wire that runs to this heater. We intend to insert a switch in this wire, and only turn it on if we experience a condensation problem.

By the way, we have a clamp-on meter made by Klein. I think we paid around $90. You can get clamp-on models for less, but the cheap ones don't measure DC current, only AC.
__________________
SSquared is offline   Reply With Quote
Old 08-14-2014, 05:06 AM   #4
Rivet Master
 
richinny's Avatar
 
2011 34' Classic
Westchester Cty.NY , / Miami FL
Join Date: Jul 2007
Posts: 3,122
check your fridge manual. mine has a switch to shut that heater off.
__________________
Ricky
2012 F150 Super Crew 5-1/2' bed Ecoboost 4x4 3.73 elec. lock diff. Propride hitch
give life. kidney & pancreas transplant 9/9/06
Ingrid-my unofficial '"World's Oldest Streamer" 1909-2008 R.I.P.
richinny is offline   Reply With Quote
Old 08-14-2014, 08:23 AM   #5
Rivet Master
 
dznf0g's Avatar

 
2007 30' Classic
Oswego , Illinois
Join Date: Jul 2010
Posts: 9,407
Images: 5
Quote:
Originally Posted by richinny View Post
check your fridge manual. mine has a switch to shut that heater off.
Mine as well.

When dry camping my draw is about 1.9 amps. In addition to the propane detector, fridge board, water pump and LED lighting, I run two small 2" computer fans inside the fridge. I do shut off the outside fans, but I have found that the interior ones are necessary of I get warm and below freezing areas of the fridge when packed full.

Last week, I was able to go three plus days and was to 40% when I left that site. Don't like to go that low, but they had a no generator policy.

BTW, I found that the charge line from the truck initially supplies 15 amps, then drops off to 12 amps, presumably as the circuit warms up and resistance increases.
__________________
-Rich-

"If the women don't find you handsome, they should at least find you handy." - Red Green
dznf0g is offline   Reply With Quote
Old 09-11-2014, 10:36 PM   #6
1 Rivet Member
 
2014 25' FB Flying Cloud
Monroe , Washington
Join Date: Apr 2014
Posts: 6
Attached is the DC current study that I did recently with a DC clamp-on ammeter.
http://wonderfulwalter.com/current_study.pdf
__________________
2014 FC 25' FB
2014 Ford F-150 XLT 4x4 EcoBoost V6
EQ WD Hitch
waltc is offline   Reply With Quote
Old 09-11-2014, 10:53 PM   #7
Rivet Master
 
1974 Argosy 20
2014 20' Flying Cloud
Kooskia , Idaho
Join Date: Jul 2009
Posts: 4,591
Here are measured DC current numbers on my 2014 20' FC.

Measured with a Tri-Metric meter and 100 amp shunt.

Water heater, when flame on: .74 amp

Refrigerator, flame on: .32

Refrigerator fan only: .55

Bed lights, reading, each: .17

Bed lights, overhead, 3: dimmest .1
brightest .52

Main overhead lights, 6 dimmest .23
brightest 1.18

Step light: .06
Scare light (floodlight) .13

Table light: High .62
Low .31

Kitchen lights (either, there are 2) High .38
low .19

Bath lights (2, each with high and low) All .72
one high .38
one low .19
Every LED light inside on at the same time: 3.9 amps


Fantastic fan, each: High 1.55
Medium 1.22
Low .93

Bath fan (little, 4" round) 1.5

Kitchen range fan: 2.4

Kitchen range fan lights (halogen) 3.5

Furnace, 18,000 btuh, direct vent burner on: 3.65
fan only: 2.9

Radio, all off, no lights showing: no measure
Radio, disco lights on, no volume: .7
Radio, lights on, medium volume: .9 to 1

Propane detector: .06


Pump: (variable speed) 2-4

1000 watt sine wave inverter, on, no load 1.76
with TV and DVD plugged in, but not on: 1.76

TV on and DVD playing: 3.6

TV on DVD playing, + radio on for sound: 4.9-5.3

Very small microwave, supplied by inverter: 89

Toaster, supplied by inverter: 75

Apple Mac Book Pro, charged running from
inverter: 3.1 to 3.3
__________________
idroba is offline   Reply With Quote
Old 09-11-2014, 11:08 PM   #8
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,279
Quote:
Originally Posted by idroba View Post
Here are measured DC current numbers on my 2014 20' FC.

Measured with a Tri-Metric meter and 100 amp shunt.

Water heater, when flame on: .74 amp

Refrigerator, flame on: .32

Refrigerator fan only: .55

Bed lights, reading, each: .17

Bed lights, overhead, 3: dimmest .1
brightest .52

Main overhead lights, 6 dimmest .23
brightest 1.18

Step light: .06
Scare light (floodlight) .13

Table light: High .62
Low .31

Kitchen lights (either, there are 2) High .38
low .19

Bath lights (2, each with high and low) All .72
one high .38
one low .19
Every LED light inside on at the same time: 3.9 amps


Fantastic fan, each: High 1.55
Medium 1.22
Low .93

Bath fan (little, 4" round) 1.5

Kitchen range fan: 2.4

Kitchen range fan lights (halogen) 3.5

Furnace, 18,000 btuh, direct vent burner on: 3.65
fan only: 2.9

Radio, all off, no lights showing: no measure
Radio, disco lights on, no volume: .7
Radio, lights on, medium volume: .9 to 1

Propane detector: .06


Pump: (variable speed) 2-4

1000 watt sine wave inverter, on, no load 1.76
with TV and DVD plugged in, but not on: 1.76

TV on and DVD playing: 3.6

TV on DVD playing, + radio on for sound: 4.9-5.3

Very small microwave, supplied by inverter: 89

Toaster, supplied by inverter: 75

Apple Mac Book Pro, charged running from
inverter: 3.1 to 3.3
NICE WORK!

And the 100 amp shunt gives you that extra decimal place of accuracy too.

In reference to running your gas/absorption fridge on LP, the control board will always be on and requires about 1/2 amp. when you operate on LP, the control board must supply a constant voltage to the LP solenoid to keep it open, as it's a normally closed solenoid that requires constant voltage to operate, so an amp while operating it on LP is about right.
__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is offline   Reply With Quote
Old 09-12-2014, 01:33 AM   #9
4 Rivet Member
 
2004 16' International CCD
Chicagoland , Illinois
Join Date: Apr 2014
Posts: 265
Images: 2
Quote:
Originally Posted by idroba View Post
Here are measured DC current numbers on my 2014 20' FC.

Measured with a Tri-Metric meter and 100 amp shunt...
Excellent! I'll be slipping a copy of this into my Owner's Manual. Thanks for taking the time to share all of that data.
__________________
Airrogant is offline   Reply With Quote
Old 09-12-2014, 06:43 PM   #10
Rivet Master
 
1974 Argosy 20
2014 20' Flying Cloud
Kooskia , Idaho
Join Date: Jul 2009
Posts: 4,591
Quote:
Originally Posted by lewster View Post

In reference to running your gas/absorption fridge on LP, the control board will always be on and requires about 1/2 amp. when you operate on LP, the control board must supply a constant voltage to the LP solenoid to keep it open, as it's a normally closed solenoid that requires constant voltage to operate, so an amp while operating it on LP is about right.
I was surprised that this new 2014 Dometic 4 cu ft refrigerator has such a low draw(0.35 amp) in comparison to the other Dometic refrigerators I have measured. You are correct that it needs power to keep the gas valve open, but it is less that I have seen other units use. The circuit board itself also seems to have a lower power draw so maybe Dometic has been making some changes. I can only tell you what I see on this 4 cu ft unit in the FC 20.

The refrigerator fan draw of .55 amps was the original fan, not only noisy but a real energy hog. I have since replaced it with a 7" computer fan with an air flow of 120 CFM and a current draw of 0.2 amps vs. the .55 amps of the original. It is dead silent too.
__________________
idroba is offline   Reply With Quote
Old 09-12-2014, 07:38 PM   #11
Rivet Master
 
dkottum's Avatar
 
2012 25' Flying Cloud
Battle Lake , Minnesota
Join Date: Jun 2009
Posts: 7,716
Idroba,

Would you have the name or a link to that computer fan you put in the fridge compartment?
__________________
Doug and Cheryl
2012 FC RB, Michelin 16, ProPride 1400
2016 Ram 1500 Laramie Crew Cab 4X4 Ecodiesel 3.92 axles

The Truth is More Important Than the Facts
dkottum is offline   Reply With Quote
Old 09-12-2014, 10:04 PM   #12
2 Rivet Member
 
daboose's Avatar

 
2014 25' FB Flying Cloud
Matthews , North Carolina
Join Date: Sep 2013
Posts: 42
Images: 11
Quote:
Originally Posted by waltc View Post
Attached is the DC current study that I did recently with a DC clamp-on ammeter.
http://wonderfulwalter.com/current_study.pdf
The study is much appreciated! Made a copy for my files. Thanks.
__________________
daboose is offline   Reply With Quote
Old 09-12-2014, 11:53 PM   #13
Rivet Master
 
1974 Argosy 20
2014 20' Flying Cloud
Kooskia , Idaho
Join Date: Jul 2009
Posts: 4,591
Quote:
Originally Posted by dkottum View Post
Idroba,

Would you have the name or a link to that computer fan you put in the fridge compartment?
I am out on a camping trip right now, but when I get home I can give you the information as I have the package it came in.

All I can say now is that it came from Fry's electronics, a big electronics superstore chain and was about $12. Once I get home I can give you the specific name and model information. I stood at their computer fan section and picked out the one with the highest CFM rating for the lowest current draw.

More later.
__________________
idroba is offline   Reply With Quote
Old 09-13-2014, 12:43 AM   #14
Rivet Master
 
mefly2's Avatar
 
2015 25' FB Eddie Bauer
Western , ** Big Sky Country ** Montana
Join Date: Feb 2010
Posts: 2,283
Thanks, Idroba !!!
__________________

__________________
mefly2 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
Parasitic Drain aftermath Batteries, Univolts, Converters & Inverters 9 03-15-2010 10:23 AM
Flow Thru Exhaust and Muffler LKappenman Mechanics Corner - Engines, Transmission & More... 17 09-22-2009 12:29 PM
Shower Regulator or Back Flow Valve GStephens Fresh Water Systems 19 07-08-2004 10:56 AM
Water flow question... Sneakinup Waste Systems, Tanks & Totes 1 05-19-2004 07:20 PM
No water flow Michael W Plumbing - Systems & Fixtures 4 10-12-2003 09:26 PM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 12:54 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.