2004 Slant Fin Intrepid boiler...domestic hw problems

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Old 10-28-15, 12:55 PM
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Exclamation 2004 Slant Fin Intrepid boiler...domestic hw problems

I just bought a home and am having problems with the hot water. It's only running hot for no more than a minute and then turns to luke-warm. This is evident in the bathroom and kitchen. I was advised by a co-worker that I would need to get a new control unit, as it cannot be set. Any advise?

Honeywell L7224C-1004 control
 

Last edited by PJmax; 10-28-15 at 02:42 PM. Reason: moved controller info from title to post
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Old 10-28-15, 02:03 PM
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It would be nice to have more info,ie type of boiler,mfg ,any other controls on the boiler.
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Old 10-28-15, 02:21 PM
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Welcome to the forums.

The L7224C-1004 is a highly complicated electronic aquastat for an oil fired boiler. There are diagnostics that can be run as well as many settings that can be altered in programming. It may not be easy for a DIY'er to diagnose that unit and it will be even harder to replace it and reprogram the new one.

As well as the make and boiler information....
We need to know what the temperature is on the boiler thermometer ?
Have you tried to see if the heat works normally ?
Do you just have the domestic hot water coil in the boiler or do you have an additional storage tank ?



forward thinking Honeywell/related_links/69-1957_2012.pdf

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Last edited by PJmax; 10-28-15 at 02:40 PM. Reason: added pic
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Old 10-28-15, 02:25 PM
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Type of Boiler

Sorry about that. It is a Oil Fired Cast Iron Boiler - INTREPID - Model No TR-20 PT. SN 1075319. Burner Capacity Light Oil: 0.75 GALS/HR. D.O.E. Capacity 91000. MAWP Water 50 PSI. Maximum Water Temp: 240 degrees F. Minimum Relief Valve Capacity: 91 LBS/HR.
 
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Old 10-28-15, 02:39 PM
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Boiler Pics

Attached are the boiler pics.

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Old 10-28-15, 04:00 PM
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I was advised by a co-worker that I would need to get a new control unit, as it cannot be set
No, that's absolutely incorrect.

From what I can see of the gauge at an angle, the temp looks like it's up there...

Please reply to Pete's q's ,,,

Read the PDF file that Pete posted a link to and go through the menu and record all of the settings and let us know what they are set to.

Don't change any of them yet, just tell us the settings.

Also, in this picture:



at the lower left there is a valve with a black knob on it. Take a look at that and tell us what it is set to also. (or take a close up of it)

I'd like to also see a shot from the left side of the boiler.
 
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Old 10-28-15, 05:33 PM
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It looks like the boiler temp is up but the pressure is at or close to 0.
 
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Old 11-02-15, 03:22 PM
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Boiler Pics

Thanks. I will review the .pdf file today. I attached more pics of the boiler.
 
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Old 11-08-15, 09:14 PM
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I read over the .pdf file and followed the instructions to adjust the different codes. However, the only codes that I could make out was the HL, LL and LDF. Then, it showed maybe 3 more settings that weren't readable but were in the OFF mode. I tried using the up and down arrow keys and they would not switch anything to ON or OFF. So I think that I just need a new controller.
 
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Old 11-10-15, 09:29 AM
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So I think that I just need a new controller
Please don't jump to conclusions.

the only codes that I could make out was the HL, LL and LDF.
You need to tell us what the settings are.

You could also have a problem with the Watts tempering valve. If the pipe coming to that valve from the boiler is HOT! when you are running hot water, but it is NOT HOT on the hot pipe leading to the house, that valve could be bad. It's a thermostatic mixing valve and they DO get stuck.
 
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