Instant hot water heater question

[petedoll50@gmail.com]

Hi all,
Just received our Thor Quantum Class C with instant hot water heat. My concern is when using the shower or other faucets for that matter when I tried to regulate it with cold water it drops off significantly. If I leave the hot on only it works fine for the shower.

My question is should I just leave it that way or am I doing something wrong??


Thanks
Pete

[Stevemcb]

I have the same heater. It is very touchy and needs water pressure to work. You will get use to it and find it is and will be a pain in the butt. Wait until you try using it at a campground with low pressure!. Keep your fresh water tank filled and use your water pump when that happens. Does anyone out there have a idea on how to get it to operate with lower pressures without burning it out? Mine works well if there is a good pressure on the line. ( more than just the internal pump puts out).

[ducksface]

Low pressure:
Never use the shore water. Always use your tank and pump for consistency.[the poster might have a pump problem]
No one I tell this to has ever had a convincing argument against it.


The hot water:
Almost all of us have found a temperature setting we like without blending in cold.
The heater is perfect that way.

You're 108° and the spouse is 103°?
It's five taps up or down on the up or down arrows of the controller.

[DavidEM]

I assume that this is the Girard tankless water heater. If so, do not try mixing hot and cold water to get your required shower temp. Set the temperature you want on the Girard panel and always only use the hot water full on. Mine is set for 110 F.

If that won't always work, remove the shower head and look for a plastic restrictive orifice inside. Remove it and throw it away. The Girard should now stay on.

For FHU users, my advice is to fill your tank from the campground's water supply, but use the coach's freshwater pump. That way the pressure is always the same. Low campground pressure may not supply enough water to trigger the Girard's flow sensor.

And finally, sometimes the sensor sticks so it will never come on. First try tapping with the handle of a screwdriver. It can be reached by opening the outside cover. The flow switch is on the right side. If the switch has failed, call Girard and they will send you a replacement.

David

[Stevemcb]

Great points. It seems to me if you set the temp higher and turned both hot and cold on at the same time you will get more pressure from your shower head. You are now opening 2 valves for more flow. The way that has been described is easier but does not produce as much pressure. Try both of your faucets at the same time to see the difference. My water pump works decent. I have at times had better PSI and GPM from outside sources. That is when I get that great higher pressure shower like you get at home. Of course you usually want full hookups at that time as the shower use does use water if you want to linger like sometimes we all do. At a 2.5 GPM shower head and 5 minute shower times 2 (can’t forget your wife)is 25 gallons. Most of us love a nice long high pressure shower at times. I guess the full timers get used to it! . I have learned quite a bit from all the forum comments.

[Matthew]

We've had both types of water heaters on campers. Tankless is preferred for us. There is no maintenance, zero. No winterization needed either. Barely uses propane. Lighter weight...
Had an issue one time with low water pressure in a Georgia State Park but no big deal.
We change the temperature setting all the time depending on the task. Wash dishes, crank up the heat, quicker and saves water.
Shower, 95 for me, wife 106. Never use cold water knob unless filling up a glass to drink.
Would recommend to anyone, but there is a learning curve understanding how it works and how that effects how you operate it.

[chunker21]

Some people love it, I hated it and getting a new RV I made sure that POS wasn't in it.

One issue especially the XG32 is the shower is tiny and for me it was difficult to lather up with the water running. Can't turn the water off because that interrupts the hot water flow to the shower resulting in steam of cold when you turn it back on. Lousy entry-level bottom shelf design in my opinion.

[paulwadley]

I have had both systems and love the tankless system best. I never run out of hot water(unless propane runs out). Like others have said, set it to the hot temp you like and leave it. No need to mix cold with it. It does require about 55 psi to operate correctly. If the campground pressure is too low, just use your onboard water tank and pump. I use an adjustable pressure regulator and know if the campground pressure is too low/high when I first set up. I also changed out the cheap shower head for a better one.

Paul

[petedoll50@gmail.com]

Matthew, Thanks for the reply. and the great advice.We have now figured it out with some trial and error for showers and doing the dishes. I have ordered a high pressure shower head like we had in or TT so I know that will be big help as well.

[petedoll50@gmail.com]

Thanks all for the advice on this issue. We have it now figured out with some trial and errors.

Pete

[MrMikey59]

Originally Posted by paulwadley

I also changed out the cheap shower head for a better one.

Paul

Please share a picture! I'd be interested in changing out mine.

[taylorbob1]

This is the one to get…

https://www.amazon.com/gp/product/B0...88400175209def

[16ACE27]

Any Oxygenics shower head is a vast improvement over OEM RV shower heads.

[taylorbob1]

Also consider upgrading the cheap 60” plastic hose for a metal one that’s 72”.
That way you have enough length to hose down the toilet (assuming it’s in the same space)