Espar Hydronic for water heating

[LanduytG]

Originally Posted by BACKRDS

Greg,

Is there any trick to just tell the hydronic pump to turn on, without the burner?

Also, so that I make sure I understand the typical SMB coolant flow setup (mine is a 2006), does the heated coolant from the hydronic unit flow to the flat plate, then on to the junction with the engine coolant loop? Does the heated fluid that reaches the engine loop get forced through the engine because SMB installed some sort of a one way valve on the engine coolant line, (between the feed and return from the hydronic unit) to prevent short circuiting?

Finally, my hydronic unit is loud compared to my airtronic unit. a) is that normal? b) I've seen a muffler advertised for the ESPAR, and they said to put it on the inlet side as this is where the noise is coming from. What can you say about this? Does it really nock the decibels down?

Thanks in advance, Steve

The heater is in series with the vehicles heater loop. When the engine is running the water pump on the engine pushes coolant through the Espar, heater core and flat plate. With engine off and the Espar on the coolant is pulled from the engine goes through the Espar flat plate and heater core. Yes the Espar pump could be used to do what you want. But it would have to be taken apart wires pulled out and a relay installed. Much clean to just add another pump. The hydronic unit is about 40% more btu that is way its louder. If you install and exhaust muffler it will quiet in down a lot. You could also install and intake silencer if you wanted.

Greg

[CJ]

Where can I get a exhaust muffler and intake silencer? Cost?

[LanduytG]

Originally Posted by CJ

Where can I get a exhaust muffler and intake silencer? Cost?

We have the mufflers ($55) in stock and will take about a week to get the intake silencer ($70).

Greg

[LanduytG]

Originally Posted by LanduytG

We have the mufflers ($55 part# 25 1864 81 01 00) in stock and will take about a week to get the intake silencer ($70 part# 251226 89 15 00).

Greg

[CJ]

LanduytG, Thanks for reply. I am seriously think about getting the muff.

thanks again

Anyone here with Muffler expierince, my understanding is there is a considerable difference with noise.

makes it much more quite.

Are they available for cabin heat and water heat?

Would appreciate hearing from anyone with exp.

[daveb]

CJ, it made a huge difference on my Hydronic. You will still hear the startup sound but in normal operation it's fairly quiet. The startup noise was so loud before I added the muffler you could hear it well over 300 feet away. If I was in a campground, people would be looking over to see what it was. I use it to pre-warm the motor during very cold weather about 4 or 5 AM and don't want to bother people. I can't comment on the silencer or anything for the Airtronic. I feel the Airtronic is quiet enough. Hope this helps.
DaveB

[CJ]

Dave, thanks I think I will dive in and get it. After all we go far away for peace and quiet!!
I imagine it's a snap to install?
Thanks again.

[Jeffrey]

CJ,

In my RB50, the Hydronic is mounted in plain view and the intake and exhaust are easily accessable. Replacing the ducts looks to be a snap. Be sure to face the free end of the intake duct DOWN for about six inches. You don't want dust and gravel getting in there. (last year's nightmare for me).

[CJ]

Thanks Jeffery. I'll do just that. Do you have the intake silencer? I'm not to sure I need it?

thanks again, appreciate the response.

[LanduytG]

Originally Posted by CJ

LanduytG, Thanks for reply. I am seriously think about getting the muff.

thanks again

Anyone here with Muffler expierince, my understanding is there is a considerable difference with noise.

makes it much more quite.

Are they available for cabin heat and water heat?

Would appreciate hearing from anyone with exp.

Mufflers are available for both heaters. The Intake silencer IMHO is not needed.

Greg