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Old 07-08-2015, 09:01 AM   #41
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I have been having problems with mine water heater since I purchased the unit in 2011. Have attempted all of the fixes that have been talked about on this forum and nothing has worked so far. Just purchased a Watts high flow regulator but have not had a change to try it out yet. Problem certainly seems to be linked to flow rate. Proper purging of the lines is also important.

Lefaivre, please post your results when you use your regulator. I have been contemplating buying one, also. When we camp, it's always at a place with hookups, and we usually shower using the facilities' bath house if it is nice. So I don't have to use the Gerard heater much.


Rich
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Old 07-09-2015, 01:14 AM   #42
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Originally Posted by lefaivre View Post
I have been having problems with mine water heater since I purchased the unit in 2011. Have attempted all of the fixes that have been talked about on this forum and nothing has worked so far. Just purchased a Watts high flow regulator but have not had a change to try it out yet. Problem certainly seems to be linked to flow rate. Proper purging of the lines is also important.
What is a Watts high flow regulator? What does it do? Help maintain water pressure? I'm almost to the stage of buying a new water pump with more pressure and installing it myself.
I was told by the dealer that the pump in our RV is underpowered from the factory for the Girard tankless.
Thanks.
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Old 07-09-2015, 07:44 AM   #43
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I was told by the dealer that the pump in our RV is underpowered from the factory for the Girard tankless.

Thanks.
Shurflo who is a major supplier of pumps used in RV's stopped making a high flow pump last year because is quality issues I was told. This has a lot of us concerned the current pump will not have enough flow to allow the tankless heaters to work correctly.
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Old 07-09-2015, 01:39 PM   #44
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Gerard water heater in 2015 Berkshire XL

So my saga continues. My Girard just not working. I ll explain the latest. Let me set it up:

Water pump --off
Coach plug into 30 amp
Inverter off
Salesman switch at entry door--off
Power switch on Girard --on

So I walk into the barn where the coach is. I hear this noise?? I was sure I had the inverter in the off position but I go check inverter. NOPE-- Walk around coach and fan is running on the Girard ??? I feel the exhaust and it is warm?? About then the burner kicks on. Stays on just a few seconds kicks off. Fan never shuts off. Burner just cycles on then off. ??

I go in an open kitchen sink water. Thinking just maybe some pressure on it? Nope. No pressure.

So I shut switch on the Girard to off. That killed cycle??

I call Girard again!! Guy there laughed (not so funny to me) and said it must be possessed!! Could be I guess---he says it a the flow switch in the back that is stuck or something. He sending me some parts ??

I'm still trying to get Forest River to return my call. Hoping to figure a way to convert to a tank instead of on demand. ??

The Girard has a two year warrantee so I guess I have a year to figure it out??

Sure looks to me like the salesman switch should kill the power to the Girard?? I guess only thing salesman switch kills is the lights??? Not the frig, micro wave or the Girard!!!!

Russell
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Old 07-09-2015, 06:31 PM   #45
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Barrie

There has been a lost of discussion as to why these on demand water heaters do not work. One thing that many of the experts point to is a low flow rate. Since the temp output of these heaters is determined by flow rate and cold cold water mix ratio .... if the input flow rate is too low, it will prematurely cause the burner to reach a high temp cut off. People have talked about reducing bottle necks in a number of ways .... one is the flow restrictions on the taps a second is the water filter and the last one is the pressure regulator that many if us used to prevent our pex from blowing out if the pressure at the camp ground is excessive.

The most common type of pressure regulator is a very small barrel shaped fitting, made out of either brass or plastic that we attach to our input hose. These fitting will typically regulate pressure to either 30 or 50 psi. This does a great job of reducing pressure and saving your piping however the output stream is normally only about 1 quarter inch and the overall flow rate is much less than the min requirement of 2.5gpm needed for the water heater.

A Watt regulated is a small brass regulator much like the one in your house that will restrict max pressure to 50psi while at the same time keeping flow rate up. Inlet and outlet AR both 3/4 Inch.

I purchased mine at.Lowes for approx.40 dollars and needed about an other 30 dollars in footings to plumb it in.
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Old 07-09-2015, 07:44 PM   #46
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Great point. I also wonder how many people are using the cheap white 1/2 inch hose. 1/2 " is not big enough.
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Old 07-09-2015, 09:12 PM   #47
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Gerard water heater in 2015 Berkshire XL

Just a question--- if 1/2 hose is not big enough how can the pump from the on board water be big enough ?
I very seldom use the city connection. Just use my on board water. Maybe that part of my problem?

Russell
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Old 07-09-2015, 09:15 PM   #48
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I assume the pump is a higher pressure. I was told when trying to figure my WH out to go to a 5/8 hose and it worked better. I'm sure someone smarter than me will chime in. I do know that it was one part of what I did to get it working better.
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Old 07-09-2015, 09:17 PM   #49
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Thanks lefaivre. That's a very clear description.
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Old 07-09-2015, 09:23 PM   #50
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I assume the pump is a higher pressure. I was told when trying to figure my WH out to go to a 5/8 hose and it worked better. I'm sure someone smarter than me will chime in. I do know that it was one part of what I did to get it working better.

Does yours work ok on the on board water?

Russell
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