Gotta be fair

Glenn Harrison

Just in case some of the rest of us that are having problems can make sure we are installing them correctly? Chances are pretty good that we are missing or misinterpreting the same things in the instructions that you did.

Thank you

Glenn Harrison Residential Service Tech

Althoff Industries Inc. Mechanical and Electrical Contractors

Crystal Lake, Illinois

chuck shaw

To be fair and honest

I have gotten several e-mails from Mark Chaffee of Taco/HVAC. He has given me some great information about a few things regarding my post about the ESP zone valves. Some of these things I did not know. If they were in the instuctions, then I missed them. I try to read the directions when using a new product, but sometimes I fail to read them properly. I guess my feeling was, that I have installed many systems with zone valves (Taco 3-wire series) and circulators. I then used the ESP valves, I did everything the same way, and followed what I understood the directions to say. Therefore the problem must be the zone valve. Chances are excellent, that in fact, it was installer error.

I would like to use this forum to retract my complete condemnation of the ESP valve, and reserve judgemnet, until I go through a complete install (or rework) of a ESP system installed strictly according to design specification.

I also want to thank Mark for getting back to me quickly on this and giving me the tech support answers and standing behind his product.

Chuck Shaw

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ScottMP

It takes a big man

To say that Chuck !

You are a proffesional, keep at it !!

Now, how about that stuff you said about my kids looking like my wife .

Capt.

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chuck shaw

Scott..

There are some things I will never take back. The kids are cute no question there. After meeting you I still say, they must take after your wife ;-)

Chuck

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chuck shaw

be glad to...

I am not going to quote Mark, since I did not recive his permission, what I will do is give a "reader's digest" version of what he said.

First-If you are using a zone contorl panel, you should be using the ZVC404-EXP (pay attention to the last three letters.) I am sure you could also use the ZVC406-EXP. They have isolation relays built into each zone.

Second-If you are not using a zone control panel, you should use isolation relays.

Third-Beware of power stealing thermostats. You can figure out if you have one, by turning the thermostat OFF, and checking with an amp meter, if it reads anything but zero, there could be problems, due to voltage leaking by. Even a T87 can cause this if using a Q539 sub base.

Another potential problem may exist, if you are using multiple valves on one transformer. There is line "noise" and the ESP valve may think this noise is a call for heat. This is where isolation relays can help out.

That is the information that he gave me.

The down side to this is, in two supply houses that I checked with, they had never heard of the ZVC-404-EXP series of control panels. They called their supplier, and they were pretty weak on the information end too. Was not happy to here that the area rep, was unaware of this.

I hope this information helps

Chuck Shaw

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Tom M.

Sounds like

the same thing that's happening with Carlin's microprocessor-based oil burner controls. Some tstats have circuitry between the heating terminals and not just a contactor or solid state switch. The Carlin controls will also pick up this "noise". They flash the amber light until the tstat calls but when the tstat stops calling, the control continues to run, seeing this noise as a call for heat. The burner will run until a pressuretrol or furnace high limit cuts out(or, as in my case, the customer calls back in three hours because his ductwork is adequately sized and the thing just won't stop). Forced hot water systems aren't affected because the burner controls are typically controlled on the high voltage side. PS- I still hope Taco doesn't discontinue the three wire models. They have been bulletproof in my experience.

[Deleted User]

Anyone for

T 11 thermostats and R 117-3 relays?

Glenn Harrison

Thank you very much, Chuck

I can say that you justy tought me something. I even talked to Mark about a month ago and he did not point these items out to me, although I am assuming this is VERY new info.

Glenn Harrison Residential Service Tech

Althoff Industries Inc. Mechanical and Electrical Contractors

Crystal Lake, Illinois