Dunkirk getting to Hot?
#1
01-12-13, 04:31 PM
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Dunkirk getting to Hot?
Have an 92 Dunkirk XE3 broiler and all of a sudden it appears that the system is running or the water is getting to hot? The temp. Gauge red arrow is set at around 120 and it looks like when the unit kicks on it is getting to hot and goes pass the Red marker and shuts off. Then when it cools down it kicks back on. Boiler is working ok but it's cycling off and on to much? Any suggestions before I call for service.
Aquastat is only 2 yrs old.
Aquastat is only 2 yrs old.
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#4
01-12-13, 05:25 PM
The red arrow was manually set by the installer, as a guide for the max temp. Your shut-off temp looks to be about 185 deg - no problem at all. Your turn-on temp seems to be 120 deg -which may be too low if you have a warm-start control setup. Give us an assortment of wide-angle photos of your boiler and tell us the model number of your aquastat and a close-up of it. It should be a gray, rectangular box mounted on your boiler, with wires going to it. Remove the box cover to see the model number.
#6
01-12-13, 05:35 PM
For reference would your unit be an XEB-3????
See install manual here...
http://www.dunkirk.com/uploads/produ...218a84b904.pdf
See install manual here...
http://www.dunkirk.com/uploads/produ...218a84b904.pdf
#7
01-12-13, 05:36 PM
the bezel looks like it re-entered from outer-space. Any idea why?
#8
01-12-13, 05:38 PM
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History. Last 5-6 yrs
T-stat always set at 69. When it hits 67, boiler kicks on and stays on until stat hits 70 and shuts off the boiler.
The temp on the boiler never went pass the red arrow.
Dunkirk XE3 boiler with aqua stat Honeywell L8148 the was replaced 1/10
T-stat always set at 69. When it hits 67, boiler kicks on and stays on until stat hits 70 and shuts off the boiler.
The temp on the boiler never went pass the red arrow.
Dunkirk XE3 boiler with aqua stat Honeywell L8148 the was replaced 1/10
#9
01-12-13, 06:45 PM
From what I you tell us, things seem to be normal. Have you observed any unusual performance? Your aquastat has a single hi-limit contact and the differential is fixed. It is a simple warm-start set-up.
Tell us what prompted your concern.
Tell us what prompted your concern.
#10
01-12-13, 06:49 PM
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Before: T-stat always set at 69. When it hits 67, boiler kicks on and stays on until stat hits 70 and shuts off the boiler.
Now it just stays at 69 with the boiler with kicking off and on constantly.
Now it just stays at 69 with the boiler with kicking off and on constantly.
#12
01-12-13, 06:57 PM
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Yes. Beginning of cold season everything was fine then this problem started about 2 weeks ago.
Even if I crank up the temp to like 74, the boiler kicks on for 5 minutes then kicks off for 5 and then kicks on for 5 minutes, and so on until it reaches the t-stat temp
Even if I crank up the temp to like 74, the boiler kicks on for 5 minutes then kicks off for 5 and then kicks on for 5 minutes, and so on until it reaches the t-stat temp
#17
01-13-13, 06:45 AM
What is the model aquastat???
I would lower it slightly to like 175-180. Then I would need to see if you have an adjustable diff. Possibly you can adjust that or you aquastat may be faulty....
I would lower it slightly to like 175-180. Then I would need to see if you have an adjustable diff. Possibly you can adjust that or you aquastat may be faulty....
#19
01-13-13, 09:21 AM
Not rude... but one thing to understand is that as mods we read and reply to HUNDREDS of messages each day... please forgive if we don't have time to read back and refresh our memories, or completely miss something...
But it's ok, we know you aren't being rude.
But it's ok, we know you aren't being rude.
#20
01-13-13, 12:09 PM
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OK, another question. The aqua stat has two terminals marked "T" "T" that go the t stat. The wires are connected to the W and Rc terminals inside the t stat. Is this correct for a hot water boiler system only? Can't find anything via google for boiler only connections.
#21
01-13-13, 04:09 PM
Some t'stats have different labels. We don't know what t'stat you have, but yes, most every one I've seen will use the W and Rh OR Rc (since in most of these cases they will be jumpered) for heat only.
What t'stat do you have?
What t'stat do you have?
Last edited by NJT; 01-13-13 at 04:49 PM.
#23
01-13-13, 04:47 PM
I believe this install booklet has the information you are looking for:
https://customer.honeywell.com/resou...69-2060EFS.pdf
Google CAN be our friend!
https://customer.honeywell.com/resou...69-2060EFS.pdf
Google CAN be our friend!
#24
01-13-13, 05:12 PM
It seems like we're going around the mulberry bush here. Initially, the problem was that the boiler was running too hot. Then it was that heat calls came and go every few minutes. Now, it's how to wire an aquastat. I can't really follow this. Maybe it's time to call in an experienced serviceman?
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