Viessmann Horizontal Indirect
One of my regular customers had a 119 gallon Superstor indirect that started leaking. We replaced it today.
Both heaters weighed 500# and it was a job getting them in and out of the mechanical room.
It should be the last water heater the owner has to buy.
Two btu per sq ft for degree difference for a slab
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If it fits… it ships.
I heard someone at the US Postal Service say that one time.
Edward Young Retired
After you make that expensive repair and you still have the same problem, What will you check next?
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I installed 3 of those 119 gallon Viessman indirects in a school.
They worked great but the issue I had was a couple of really small weeper leaks I think at the coil connections (SS ?) I forgot it was like 8 years ago. They didn't show up for months after the install.
Isn't the water temp sensor at the opposite end of the tank?
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@EBEBRATT-Ed There is a thermometer at the end with a display as well as a large cleanout manhole. Neither will ever get used.
All the piping and aquastat connections are on the business end.
Pinhole leaks, huh? What a drag to have to change out. I hope you put unions on your connections.
I’ve installed dozens of them, miles and miles : ) and have never had a leaker. There was one installed by someone else - a Viessmann - but it was their 100 series; steel tank with an enamel lining. It started leaking after 20 years and I replaced it with a 300 series tank - stainless.8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour
Two btu per sq ft for degree difference for a slab0 -
@Alan (California Radiant) Forbes
No it was all propress. 😕 I went back to the job a year after the install for something else and saw a few crustys it wasn't even wet no water on the floor.
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Self-sealing. I love those! Bad water quality sometimes works in your favor.
8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour
Two btu per sq ft for degree difference for a slab0 -
you don't have road salt out there
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It was the threaded adapters on to the coil connections that were the issue if I remember right.
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I had a hairline crack in the adapter fitting on a 300. I concluded I must tightened it a little to much and it cracked over time, showed up 5 years later as a very fine spray. I don't think they go from non taper thread BPT? to NPT anymore so that may help.
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That is a nice waterheater…Why a Horizontal tank vs. a vertical tank ?
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Have you ever ordered a V. 119-gallon vertical tank? It comes two pieces; the tank and the enclosure and is a PITA to put together.
We also had the room for a horizontal and it’s the perfect height for serving cocktails.8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour
Two btu per sq ft for degree difference for a slab2 -
I think the job I did we had 4 of them and we stacked then 2 high
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Thought I had more pics of the job guess not
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Very pretty. I'd say 2-3 days with two plumbers?
Must've had a large, floor-mounted x-tank.
8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour
Two btu per sq ft for degree difference for a slab0 -
some of the Viessmann boilers matched the horizontal tanks for stacking, the Biferral for example
Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream
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@Alan (California Radiant) Forbes
We removed two oil fired HW heaters that failed. It was strange because the old heaters were about 16 years old and 1 failed. They only needed one so we valved off the bad one and they were ok for about a month when the other one failed.
I had help getting the old ones out and the new ones in the boiler room and did the install by myself after that. We were lucky we had something overhead to hook a chain fall to. When had to lift the boiler off the combustion chamber base and it barely fit through the door in the vertical position. We didn't know how it was going to be until we got the jacket ripped off it to have a look.
I had nightmares about trying to lay the thing down or worse cutting it up so we lucked out. And there were two of the old ones although the pic only shows one.
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Goodness! Lord knows how we lose sleep worrying about the next day's work.
8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour
Two btu per sq ft for degree difference for a slab2 -
@Alan (California Radiant) Forbes
That was one of my issues. I used the old saying "I worry about a lot of things most of them never happened" sometimes it actually works
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I like to think of it as mental dry-runs. Prepares you for the “what-if” situations. Tough when it keeps you awake tho.
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The tougher the job the less sleep you get LOL
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