Hot Water Tempering Valve

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Thechap
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Posts: 52
Joined: Thu. Nov. 22, 2007 5:11 pm
Stove/Furnace Make: Harmon
Stove/Furnace Model: Mark III
Location: Waynesboro, Pa

Post Fri. Jan. 17, 2014 10:54 am

I have an outdoor wood stove which I am also using to heat my domestic hot water. I have taken a photo of the hot water tempering valve. This system has been in use for I would say five years. This year the hot water doesn't seem to be hot enough. The water temperature going into the oil burner is running around 160 degrees. So the temperature of the water going through the domestic hot water tank should be roughly the same?

Which way would I turn the tempering valve to decrease the amount of cold water being mixed with the hot water?
Tempering valve.jpg

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Sting
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Joined: Mon. Feb. 25, 2008 4:24 pm
Other Heating: OBSO Lennox Pulse "Air Scorcher" burning NG
Location: Lower Fox Valley = Wisconsin

Post Fri. Jan. 17, 2014 10:59 am

These devices "stick" or get buggy with some regularity.

a) take it apart -clean it and put it back together
b) have a plumber fix it
c) replace it and have a nice day - and plan to replace it in about the same life cycle

Kind regards
Sting

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Sting
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Posts: 2966
Joined: Mon. Feb. 25, 2008 4:24 pm
Other Heating: OBSO Lennox Pulse "Air Scorcher" burning NG
Location: Lower Fox Valley = Wisconsin

Post Fri. Jan. 17, 2014 11:00 am

OH -- you may want to shut the water off first :D


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CoalHeat
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Stoker Coal Boiler: 1959 EFM 350
Hand Fed Coal Stove: Harman Magnafire Mark I
Baseburners & Antiques: Sears Signal Oak 15 & Andes Kitchen Range
Coal Size/Type: Rice and Chestnut
Other Heating: Fisher Fireplace Insert
Location: Stillwater, New Jersey

Post Fri. Jan. 17, 2014 8:25 pm

I just had the same issue with the tempering valve on the EFM. Began loosing hot water under high demand a few weeks ago, yesterday had a lukewarm shower. I was about to remove the guts but I got the hot water running at a good flow and rotated the adjustment stop to stop a bunch of times. Hot water is back now.
To answer your question: There should be a tag on the handle with arrows telling you which way to turn for warmer and for cooler.
IMG_4644.jpg

Thechap
Member
Posts: 52
Joined: Thu. Nov. 22, 2007 5:11 pm
Stove/Furnace Make: Harmon
Stove/Furnace Model: Mark III
Location: Waynesboro, Pa

Post Sat. Jan. 18, 2014 10:44 am

Thanks everyone! I will check the valve this morning and get back to you.

Thechap
Member
Posts: 52
Joined: Thu. Nov. 22, 2007 5:11 pm
Stove/Furnace Make: Harmon
Stove/Furnace Model: Mark III
Location: Waynesboro, Pa

Post Sat. Jan. 18, 2014 11:12 am

After turning the valve the right direction I now have hot water again!

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