Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-22-2015, 02:55 PM   #1
Winnebago Owner
 
Nomad Mike's Avatar
 
Join Date: Nov 2014
Location: Nomadic - Currently Near Lassen NF
Posts: 217
Hot Water Tank vs Fresh Water Tank

How do I know if the hot water tank has enough water to turn on the electric heat? I know I can pull the relief valve to see if it has water, but what is the relationship between the fresh water fill level and the hot water tank fill level?

So I have 1/3 tank of fresh, does that mean I have a full hot water tank ie ~20 fresh and 10 hot? The specs say I have a 93 gal fresh water tank with hot water tank included. From looking at diagrams the hot fills at the same time it is supplied to the taps with cold and since the pump supplies the hot water pressure, I should be fine at that 1/3. But how low is too low in the fresh tank before I need to cut off the hot usage?
__________________
Luna was born in 2005 and is a Winnebago Journey 34H w/ CAT C7 350
[SIGPIC][/SIGPIC]
Nomad Mike is offline   Reply With Quote
Old 06-22-2015, 03:02 PM   #2
Winnebago Camper
 
Join Date: Jan 2013
Location: michigan-tip of the mitt
Posts: 28
If you have water, tank or hose, and water comes out the hot water side of any faucet you are good to heat it. Tank gal. has no effect on amount of water in heater except when tank is empty.
__________________
"96" HR Navigator, 38' no slides, Cummins, Allison
next stop
t55watson is offline   Reply With Quote
Old 06-22-2015, 03:13 PM   #3
Registered User
 
mel s's Avatar
 
Join Date: Mar 2010
Posts: 340
Quote:
Originally Posted by Nomad Mike View Post
How do I know if the hot water tank has enough water to turn on the electric heat? I know I can pull the relief valve to see if it has water, but what is the relationship between the fresh water fill level and the hot water tank fill level?

So I have 1/3 tank of fresh, does that mean I have a full hot water tank ie ~20 fresh and 10 hot? The specs say I have a 93 gal fresh water tank with hot water tank included. From looking at diagrams the hot fills at the same time it is supplied to the taps with cold and since the pump supplies the hot water pressure, I should be fine at that 1/3. But how low is too low in the fresh tank before I need to cut off the hot usage?
Nomad Mike
The amount of water in a RV fresh water tank has little to do with the amount of water in the RV water heater tank, (unless the fresh water tank is empty).
To determine if my water heater tank is full when I'm using water tank water, I open a hot water faucet and run it until only water comes out, (no air).
Same when I have pressurized water from an outside source, (like a campsite faucet).
Mel
'96 Safari
__________________
mel s is offline   Reply With Quote
Old 06-22-2015, 03:50 PM   #4
Winnebago Owner
 
Nomad Mike's Avatar
 
Join Date: Nov 2014
Location: Nomadic - Currently Near Lassen NF
Posts: 217
Thanks for the help, so I don't have to worry about the electric element if I have water running from the hot side of my sinks.
__________________
Luna was born in 2005 and is a Winnebago Journey 34H w/ CAT C7 350
[SIGPIC][/SIGPIC]
Nomad Mike is offline   Reply With Quote
Old 06-22-2015, 03:59 PM   #5
Winnebago Camper
 
J Birder's Avatar
 
Join Date: Feb 2012
Location: Lake County, IL
Posts: 14
Quote:
Originally Posted by t55watson View Post
If you have water, tank or hose, and water comes out the hot water side of any faucet you are good to heat it. Tank gal. has no effect on amount of water in heater except when tank is empty.
That is not always true. If the hot water tank was bypassed for winterizing, and the valves are still in the bypass position, then (cold) water will come out of any of the Hot water faucets, but the hot water tank will still be empty.Turning on the heat would not be a good thing to do.

Joel
__________________
Retired electronics engineer. Avid paddler & birder.
2011 Silverado 2500HD, diesel, 4x4,crew cab, 8' bed
Palomino Puma 253FBS (27' 5er) & '94 19' Class B
J Birder is offline   Reply With Quote
Old 06-22-2015, 04:07 PM   #6
Winnebago Watcher
 
schrederman's Avatar
 
Join Date: Mar 2012
Location: Weatherford, TX
Posts: 4
I ALWAYS open the pop-off valve on my water heater to be sure it's full before turning it on. I replaced a friend's water heater last year. He turned it on with no water in it and the tank cracked... not good... expensive... and that was with no labor cost. Yes... he's that good of a friend...
__________________
Jack and Dee Dee Weatherford, Texas
2014 Ram 2500 Crew Cab 4X4 w/CTD 6.7
2016 Jayco White Hawk 28DSBH Travel Trailer
schrederman is offline   Reply With Quote
Old 06-23-2015, 06:50 AM   #7
Registered User
 
mel s's Avatar
 
Join Date: Mar 2010
Posts: 340
Quote:
Originally Posted by J Birder View Post
That is not always true. If the hot water tank was bypassed for winterizing, and the valves are still in the bypass position, then (cold) water will come out of any of the Hot water faucets, but the hot water tank will still be empty.Turning on the heat would not be a good thing to do.
Joel
J Birder
Correct
If the water heater has a bypass and IF the bypass valves are not set correctly no water will fill the water heater tank, (but water will flow out of the hot water faucets).
I should have stated that in my previous post, (#3 in this thread).
Sorry
Mel
'96 Safari
__________________
mel s is offline   Reply With Quote
Old 07-22-2015, 08:47 AM   #8
Winnebago Camper
 
macgyvr's Avatar
 
Join Date: Mar 2014
Location: NE Indiana
Posts: 35
So if the bypass is on, you'll have water in both the hot water and cold water side of the faucet?

My bypass selector is a bit misleading and I'm not sure if I'm in bypass or not.

In one selection I have water out of both sides...in the other selection I have water out of only the cold water side...nothing from the hot side...

Which is the normal selection...no need to bypass it.

My water heater is only running for 20-30 seconds and shutting off, I'm wondering if somehow I'm not getting water into the water heater and the water heater doesn't like no water and it is shutting off the gas.

mac 'not hot' gyvr
__________________
2001 Winnebago Journey 32t, towing my golf cart and 04 Jeep Wrangler Unlimited to places I never dreamed I'd be able to go to.
NAXJA President
macgyvr is offline   Reply With Quote
Old 07-22-2015, 09:14 AM   #9
Winnebago Owner
 
Nomad Mike's Avatar
 
Join Date: Nov 2014
Location: Nomadic - Currently Near Lassen NF
Posts: 217
You should get water out of both hot and cold always. If your in bypass, the cold water supplied either by your pump or a city connection will skip the hot water tank but enter the hot water line. When the bypass in not on, water will enter the hot water tank and exit into the hot water line.

I found this drawing somewhere on this forum:
Attached Thumbnails
Click image for larger version

Name:	Fresh Water Diagram.jpg
Views:	76
Size:	614.8 KB
ID:	100821  
__________________
Luna was born in 2005 and is a Winnebago Journey 34H w/ CAT C7 350
[SIGPIC][/SIGPIC]
Nomad Mike is offline   Reply With Quote
Old 07-22-2015, 09:15 AM   #10
Registered User
 
mel s's Avatar
 
Join Date: Mar 2010
Posts: 340
Quote:
Originally Posted by macgyvr View Post
So if the bypass is on, you'll have water in both the hot water and cold water side of the faucet?
My bypass selector is a bit misleading and I'm not sure if I'm in bypass or not.
In one selection I have water out of both sides...in the other selection I have water out of only the cold water side...nothing from the hot side...
Which is the normal selection...no need to bypass it.
My water heater is only running for 20-30 seconds and shutting off, I'm wondering if somehow I'm not getting water into the water heater and the water heater doesn't like no water and it is shutting off the gas.
mac 'not hot' gyvr
macgyvr
I don't think that any RV water heater knows if it has water in it or not.
Me thinks you have a "electronic control board problem".
Most RV repair shops have a board tester... (and many test boards for free).
Remove your control board... take it in and and have it tested.
Mel
'96 Safari
__________________
mel s is offline   Reply With Quote
Old 07-28-2015, 06:24 AM   #11
Winnebago Camper
 
macgyvr's Avatar
 
Join Date: Mar 2014
Location: NE Indiana
Posts: 35
Thanks for the replies.

So I had replaced my ect, tstat, thermocoupler, and that other diode overload thingy (that's a word right?). The dang water heater was running 10-30 seconds and shutting off.

I wasn't getting water off the hot water side on one of the two bypass selections, turned out to be the normal selection.

I did however have water in the water heater when I pulled the drain plug. I did not having anything coming out of the relief valve at the top.

So after a bunch of searching via google and this site, I pulled the plug again on the hot water heater. Only about a gallon of water drained out.

I determined that the one way coupler on the water line was broke and only letting water drip in. The water heater was turning on but as we know hot air gets hot faster than water, so the water heater was over heating and the ect, tstat was doing its job and shutting the water heater off.

So I stood on my head, pulled the water heater partially out and took the coupler on the bottom of the water heater off. It was in fact broken. I pulled the guts of it out, stood back on my head to put it back together.

The water now flows to the hot water heater and to my faucets. The water heater fires up and works. We had hot water this weekend.

I also figured out that this water heater is not the original to the coach (dated 2007). Not to surprising since the coach is 14 almost 15 years old. It does have two hoses coming off that look like they go into the cooling system of the coach. I didn't think that Diesel pushers had the motoraid...I don't know how to turn it on to use it either, not sure if someone added it on or what.

Regardless, we have hot water, wife happy.

mac 'happy wife, happy life' gyvr
__________________
2001 Winnebago Journey 32t, towing my golf cart and 04 Jeep Wrangler Unlimited to places I never dreamed I'd be able to go to.
NAXJA President
macgyvr is offline   Reply With Quote
Old 07-28-2015, 03:30 PM   #12
Winnebago Master
 
wa8yxm's Avatar
 
Join Date: Mar 2009
Posts: 851
If fresh water has enough for the pump to suck and bypass valves are not in bypass mode hot water tank has water (enough) in it.

I'm in S.E. Ga. it's 5:30 the fresh water tank IS hot water

Seroiusly accidently turned off hot water the other day.. Did not matter, Morning shower was well within comfort zone.
__________________
Home is where I park it!
[SIGPIC][/SIGPIC]
wa8yxm is offline   Reply With Quote
Old 07-28-2015, 03:48 PM   #13
Winnebago Master
 
cbeierl's Avatar
 
Join Date: Aug 2005
Location: Nashua, NH
Posts: 1,288
Quote:
Originally Posted by macgyvr View Post
... I didn't think that Diesel pushers had the motoraid...I don't know how to turn it on to use it either, not sure if someone added it on or what....
Many (most? all?) of the Winnebago diesel pushers have motoraid heating the hot water tank (but not a house heater in the rear of the coach as many gas models have).
__________________
Chris Beierl

2005 Winnebago Vectra 36RD
cbeierl is offline   Reply With Quote
Old 07-28-2015, 08:47 PM   #14
Winnebago Camper
 
rgreen45's Avatar
 
Join Date: Jun 2011
Location: Bradenton, Fl.
Posts: 17
Quote:
Originally Posted by macgyvr View Post
Thanks for the replies.

I determined that the one way coupler on the water line was broke and only letting water drip in. The water heater was turning on but as we know hot air gets hot faster than water, so the water heater was over heating and the ect, tstat was doing its job and shutting the water heater off.

So I stood on my head, pulled the water heater partially out and took the coupler on the bottom of the water heater off. It was in fact broken. I pulled the guts of it out, stood back on my head to put it back together.
I hope you replaced that check valve ... the thing you called a one way coupler. It needs to be there.
__________________
Ray G.
ASE Master Med-Heavy Trucks
RVIA Certified
rgreen45 is offline   Reply With Quote
Reply

Tags
fresh water, tank, water


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
Tank vent tube drains fresh water tank problem Laker44 Plumbing | Systems and Fixtures 20 09-01-2014 09:53 AM
City Water fill leaks into fresh water tank ravenbuck Plumbing | Systems and Fixtures 13 11-27-2010 12:46 PM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 06:51 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.