Stupid Question ( d. Sutton )

David Sutton_6

going to tlk to them about that



David

David Sutton_6

First time install

I had a leaking copper tube boiler at a friends resterunt and had to put in a boiler that i have never put in. this i dont like. i like to read up and study a new product before i put on in , not learn as i go.....this was done last min on a Saturday no one to ask questions to...

So please bear with me.. it a lochinvar CWNO745PM
two inch sup, and return, look at the picks and see what i did. this heats a 200 gal storage tank, this will be replace at a latter date, but i want the tank to run the boler, do i need a remote sensor to do this and where do you hook it up to???????

also the boiler over rides its limets by 35*. the capularie tube was kinked when we got the boiler , would this cause a problem?

Thank you very much for any help with this..


David

EBEBRATT-Ed

I'm not familier with that particular boiler but if you have a remote bulb aqustat with a kinked cap. yup that can cause the control not to work properly. I would think you would want a control in the tank to fire the boiler and may wan't to delay circ. shutdown on boiler shutdown to kep the boiler from tripping limit on residual heat.


ED

David Sutton_6

Thank you Ed

The lititure says it comes with a remote tank sensor but the reorder list do not list it and it was not with the boiler, this is what i get for not learning first ;-)




David

J.C.A._3

I know your pain.

I too, like to know the product BEFORE I get to install it...but that ain't always the case.

At that point, I rely on the manufacturers instructions and go by their piping and wiring diagrams...to the tee.

There's always a technical assistance phone number on the paperwork...use it ! If you have any questions, that's what they do. They especially love hearing from true professionals. Imagine that job! Hearing some of the most basic questions day in and out, and not being able to explain the simplest of things to the clueless.

The "override" on the control doesn't sound good. I would lower the temp to the difference and get another ASAP. Good luck David. Being thrown to the wolves ain't no fun...but when you know the bottom line and can feel the things that don't sit well with you....you're probably on the right track. Chris

Bill Nye_2

David

I searched Lochinvar but for some reason couldn't download the I/O manual.

The few that I put in required a flow switch and a secondary high limit. Flow through the boiler is critical, you gotta' have enuff' pump. I did primary /secondary.

No directions for you to read? Did you get a free dinah ?

David Sutton_6

Hi Bill

Yup had a Big Rib eye with a Garlic butter and crab cakes with a balsamic vinagrette mmmmmmmm good!

I have the books that came with the boiler but they are real veag as to disciption and not much on options and field wiring.

Thanks bill

David

Weezbo

a capillary tube is a touchy item...

if it has a leak it dosent work if it dosent make some contact with noox in the well or fit against the well properly it dosent work right. if you are saying it is running hot then you might not have a high limit at all.

Jeff Elston

Tank sensors

The sensor comes in the plastic bag the literature is in.
The cap tube is for the resettable high limit, the boiler controls temp. sensor are the black wires next to the the cap tube

To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

Jeff Elston

Temp over ride

I believe that boiler senses the inlet temp and the control setting is for the inlet not outlet

To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

David Sutton_6

Thank you Jeff

There was no sensor that came with it . i'll have to check on monday for one



David

Candace Parker

i&o

You can find the manual for this unit here: http://www.lochinvar.com/product.asp?cat=WH&cls=COMM&prod=CW495&ln=CF

Call 615-889-8900 and ask for tech service if you have any questions regarding install.

best of luck!

bert

another comment

I would be sure to have thermometers on both supply and return pipes. Keep temperature rise across boiler between 20 and 30 degrees. Anything above 40 degrees will ultimately result in a premature heat-x failure.

Stirling Boston

Installation Help

David,

I think I can make a few recommendations that will be helpful. First and foremost, the kinked capillary could be causing the limit to not respond but I would be more concerned about the water heaters thermostat not catching the satified temperature and not shutting down the heater. I could not tell if you were saying that the unit was running above the t-stat and high limit setpoints.

To answer your question about the tank running the heater, the sensor on the inlet side of the heat exchanger (that has the pink quick connects) can be moved to the tank so that the tank temp is what the thermostat will be running off of. If you use the included pump relay to power the circulating pump this will also give the t-stat an accurate temp in the tank when the pump is off.

Flow is definitly a critical element of the units operation. I'm curious if the unit came with a circulationg pump? When the pump is provided with the water heater it is sized to handle the pressure drop of 45 straight feet of pipe and an ample number of fittings to complete the piping to the tank which from the pictures it looks like you should be OK. I can see in your pictures that it looks like you might have used an existing pump. I would guess that the existing pump may be a little undersized for the job. The only other concern that I have is that there is a check valve in the line comming off of the top of the tank (shown closest in the photo) that could be too restrictive for the existing pump and as well for the Lochivnar provided pump. Lochivnar does not require that this check valve be installed and I bet that it is causing a large pressure drop in the system. The best way to check the flow rate is to measure the delta T of the heater at full fire. This specific unit should have a 22 deg F. rise at full fire. A higher delta T would indicate too little of flow and a lower delta T would indicate excessive flow.

I hope this info helps, and I would be more than willing to provide you with any additional support if you need it.

Stirling

David Sutton_6

Hello Striling

Thank you for your input! i had gone back and replaced the circulator, and i am waiting to recive a new capulari tube, once i replaced the circ i got the delta t down to 22*.
if i move the sensor from the return line to the tank what will control the limet in the boiler? like i said this is the first one i have done and training will be coming next before i try another one, but i did not have a choice.

Thank you ....David