Indirect heater zone valve

chuck172

I replaced the circulator pump with a honeywell zone valve, (small oriface) and upped the size of the copper from 3/4" to 1" (the coil size)
Very happy with the results. I don't feel I've lost any flow. If anything, seems to recharge faster. Glad I did it.
Thanks everyone.

chuck172

Indirect heater zone valve

I'd like to pipe my 40 gallon superstor with a zone valve on the return. I'm using 1" copper. The size of the coil.
Problem is the honeywell zone valve is not full bore. I know it would be better to pipe this zone with its own circ. Will I have serious flow restriction problems?

Robert O'Brien

You

won't get the full output but unless you have a 141K BTU boiler that the ratings are based on you won't anyway.Use a full bore zone valve and prioritize and in most residential applications you won't have a problem.Taco EBV valves have a Cv of 8.9,something to consider.

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chuck172

I Wish

I wish I had a Taco full bore zone valve. What I have is a Honeywell V8043E1020. Will the restriction be too much or can I get away with it?

Leo_13

I don't want to sound mean

I don't want to sound mean but you sound cheap. You don't want to use a seperate circ, and wish you had a Taco EBV. So you have a Honeywell. Get an additional circ and do it right. Rather than messing around. Now if you are one of those guys who always tinkers go for it, experimenting
never hurts if it is not at a customer's expense.

Leo

chuck172

Had one

I had a circulator piped into the superstor. The 3/4 line went off the supply and returned with its own circulator into a spare return boiler taping.What I'm doing now is setting up my slant fin boiler to run in parallel with a TarmSolo 40 wood boiler. The only way I can think of doing this is to use all zone valves on a common return header. I've heard of others using this method, but the restriction of the zone valve worries me. One thing I did do is increase from 3/4" to 1". The size of the coil in the tank.

bill_97

I don't see

why you would think he is being cheap Leo . A zone valve and a circulator with a flow valve or IFC are just about the same in price .

Take a look in a 1 inch zone valve , a 1 inch weighted flow valve and a circulator with an internal flow check . I'll bet the resistence through all 3 are pretty close . Just like alot of things in life , there's more than one way to do it right .

Leo_13

The picture changes

Ron,

His other post said he already had the Honeywell valve, that made it sound like a scrounger. He never said he had a wood boiler to hook up in parallel, that changes everything. Or I missed seeing it in his first post.

Leo

chuck172

sorry

I'm sorry I didn't tell the full story. I just didn't want to over-complicate this post. Don't get me wrong, I would like to use what I have on hand. If I have to get a full bore zone valve to do it right I will.
Why are full bore zone valves less common than the more restrictive ones. I don't understand in what application small bore valves are prefered. Can you guys help me on this?

bill_97

Leo

Not to split hairs , but the question is still - will a zone valve be too restrictive on an indirect . The wood boiler scenerio didn't change the question .

I'm not an expert on zone valves , I'm just a boiler installer that uses circs for everything ( not by choice ) . A full port zone valve will give you more flow than a standard port zone valve . But I'll guess the pickup is so minimal you won't see a big difference by using a full port valve .

steveex

I have put in many with the zone valves 1 inch, no problem.

Leo_13

A while back

A while back I was at a class by a Taco rep. He said for best results use a circulator. It was asked if the EBV would work as it is full opening and rather fast acting. He said the circ is the best choice but hey, they sell both so go for it. I have seen a lot of indirects on zone valves, but I have seen a lot of oversized boilers, over radiated houses, the list goes on. Just because it works doesn't mean it is the best set up.

Leo

Paul Fredricks_9

I agree. The worst that could happen is you'll have to change it out later. I've put in many with ZV's with no problem, but it also depends on demand. Two people in the house shouldn't require much HW. A house full of teenagers? That's another story.

I don't know why they just don't make all their ZV's full port, but it may have to do with balancing. If all the valves opened at once the flow may tend to go to the zone with the least resistance, leaving the others to wait for that zone to be satisfied.

Just a guess.