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Author Topic: Return water temperature????  (Read 4187 times)

jon d

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Return water temperature????
« on: November 27, 2009, 06:55:02 AM »
Wondering what everyone's return temps are? last year mine was about 15-18 degree drop. Today i saw a 160 feed temp and a 120 return. I have made a few changes since then---I need to check a few things out and i'll repost...... ???
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jon d
Hawesville, Kentucky
Central boiler 5036 installed in 09

mikenc

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Re: Return water temperature????
« Reply #1 on: November 27, 2009, 08:35:46 AM »
Jon I have 60 plate heat exchanger, when AHU is calling for heat there is about 12-13 deg drop between OWB Supply and return at exchanger.
40 deg drop!! sounds like something has changed .
Curious to here what you find.

I checked temp differance this afternoon after I got home on HW coil there was 12-15 deg. differance.
« Last Edit: November 27, 2009, 05:07:29 PM by mikenc »
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jon d

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Re: Return water temperature????
« Reply #2 on: November 27, 2009, 06:14:08 PM »
I purged the feed lines at different locations and rechecked temps. I then had a 15 degree difference. Checked alittle later and had a 20 drgree difference. Probably just a little air in the system. I did a 100gl. water heater install with dual flatplate exchangers  this past summer. Probably just alittle air.....
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jon d
Hawesville, Kentucky
Central boiler 5036 installed in 09