Opinions on properly tying in our OWB...

[TonyG]

to our existing New Yorker oil unit.
A friend of mine insist on using plate heat exchangers to insure that the dissolved oxygen from the OWB doesn't rot our oil unit.

The dealer insist that the treated water will prevent this from happening, in fact will clean to some extent the oil furnace.

I'd like to here from you guy's on this subject.

 

[rx7145]

I would use the heat exchanger.

 

[oneoldbanjo]

Both the Outdoor Woodburner and your oil furnace use the same principal to prevent corrosion - they use stale oxygen starved water to avoid corrosion. Rust is an oxidation process - and rust does not occur when the water is lacking oxygen. The Pex tubing does not allow oxygen to permeate the pipe and the yearly flush and additive put in the water establishes a good oxygen starved water in the system.

I don't believe it makes any difference if you tie the OWB in directly or use a heat exchanger - provided that you use the corrosion additive.

 

[blackdogon57]

Pex

The Pex tubing does not allow oxygen to permeate the pipe and the yearly flush and additive put in the water establishes a good oxygen starved water in the system.

You must use the correct type of oxygen barrier Pex. Regular pex is not the right stuff.

 

[rx7145]

The old pressurized system is made to be pressurized, as far as the lines and other components. With the pressurized system you can use air bleeders and auto fill valves. (which are probity already installed, They might need to be removed if the systems are not separate) Pumps run better under pressure and you could run the oil boiler with out water in the OWB unit - A true back up.

 

[TonyG]

Ok,

if I decide to run with plate heat exchangers, where would you guy's shop for them online?

 

[rx7145]

Flee-bay

 

[fletcher0780]

I'd definitely use a plate exchanger, otherwise you end up turning your closed loop heating system into an open loop and if there is any heat plumbing above the overflow on your wood boiler your system will drain to that level.

 

[tanker]

I'd definitely use a plate exchanger, otherwise you end up turning your closed loop heating system into an open loop and if there is any heat plumbing above the overflow on your wood boiler your system will drain to that level.

my 21/2 story house sits approx. 20-25' above my c.b.,tied directly into my boiler in the basement,going on 5 years no problems

 

[fletcher0780]

my 21/2 story house sits approx. 20-25' above my c.b.,tied directly into my boiler in the basement,going on 5 years no problems

your heating water that runs through your baseboard is the same water that is heated in you CB? Gravity and fluid dynamics says your system would act like a water level, but I've been wrong before.