Honeywell Aquastat

R Troughton

I am planning on using a Honeywell aquastat on my 40 yr old American Standard boiler. Problem is there isn't enough room where the high limit is installed into the unit. (Upper left corner of the unit.)

Is it feasable to extend out beyond the cowling and install the 'stat at the end of the extension?? Will this allow for correct readings? Any other ideas as to installing the 'stat?

Thanks!

John@Reliable_4

No , you can't move it...........

the bulb/well must be in the boiler water to sense the temp. If you move it out of the boiler temp will be allot higher as the control will not sense the boiler water where it should. I would consider just replacing what you have now, (4006 /6006?) as 8148 control really doesn't offer much more than being a hi limit anyway. Even better would to replace the 40+ boiler. How this helps John@Reliable

R Troughton

That's what I

was afraid of. Currently there is the original American Standard high limit.

Actually the 8148 gives me a couple of controls I need. Currently the circulator pump is controlled by the low limit switch only. I want to control it with the new zone valves and the L8148 gives me that option.

Don't really want to replace the boiler, it's an oldie but a goodie..

Guess I'll look into modifying the boiler shroud to allow the installation of the 8148. The biggest problem will be the exhaust shroud which runs next to the high limit switch.

Thanks John!

Rob

John@Reliable_4

Better way maybe?

Use a 8124 which has lo/hi limits plus zone control. Cost is only a few more $$,but still the same size as 8148.

Boilerpro_3

He's right John, if

it's the same Natural gas atmospheric model I have in my home (installed 1962), it's a great boiler. Inexpensive to operate and very reliable. With gas at about $0.70 per therm, we heat our 2800, circa 1900 2 story frame for about $800.00 per year....not bad from talking to others.
So far, in my rather short time in business, I've never seen an American Standard leaker.

Boilerpro

Rob T

It is definitely

about the same age. Mine was installed around '64 from what I can tell. I heat my 100 yr. old 2 story 1800 sqft non-insulated farmhouse for around $650 per year. (This includes a gas clothes dryer also.) Hoping to keep it as long as possible.

I have been doing some re-thinking and I "may" be able to squeeze the 8148 into the space that the original limit is in.

I thought that the 8148 was wider than it is. (Don't have mine yet and was going by another control we have here at work.) I have since found the dimensions on the web and it looks like it might fit.

Will do a mock up of it and see once I get home.

From what I can see the 8124 only adds the low limt which this boiler already has installed.

Thanks for the replies!

Rob

Rob T

Did some

measuring at lunch. The Aquastat will fit in the space occupied by the HLS currently.

It looks like I will need to remove the top shroud and the exhaust stack to access the area though.

I may leave it until spring now.... I would hate to get it apart and end up not being able to re-assemble it just before heating season... Though I do hate the idea of having all those new zone valves and not being able to utilize them...