Indoor / Outdoor - Plumbing Zone

Tankless · 02-28-2009, 03:18 PM

OK, so I have a job that I am bidding. It's 2 tankless heaters with a recirc system.

The pump and my electronics are not allowed...rather approved for outdoor installations. I was thinking of some kind of enclosure with a hinged door with an open bottom. What suggestions do you have?

Mounting the pump / electronics under the house is a last resort and I really do not want to do that. There is a 75 gal in a tin house on the side of the furthest exterior wall. There is no recirc as of now, and opposite end is taking about 4.5 minutes for HW. The design is correct I just need to protect my pump / housing. Leaving the tin house is not an option. Looking for economical way of doing this because the rest of the job is gonna cost a boat load. I don't want to price myself out of the job for some eloborate housing. Was thinking 3/4" treated ply with a back against the stuccoo wall so I don't have to flash it. Advice? Thanks!

rocksteady · 02-28-2009, 03:24 PM

it may be kind of funkybut how about one of those smaller rubbermaid sheds? they make the real shallow ones that people install right on the side of their house, much like the tin doghouse that's already there. it'll look a little better i think and it's water proof. otherwise, i think you'd need to build something.

paul

rocksteady · 02-28-2009, 03:26 PM

maybe something like this. you'd have to customize it a little bit but it'd save a ton of time.

paul

Plumbus · 02-28-2009, 03:33 PM

How about mounting the pump in a cabinet at the far end of the loop? Put an aquastat on it and it will shut down when it's hot, negating the necessity of having to purge cold water from the return line. Of course, you may have noise issues in that cabinet, but at least it's inside.

Plumber · 02-28-2009, 04:09 PM

Ask the homeowner what they would prefer? Maybe they have their own ideas.

Tankless · 02-28-2009, 04:10 PM

Quote:

Originally Posted by Plumbus

How about mounting the pump in a cabinet at the far end of the loop? Put an aquastat on it and it will shut down when it's hot, negating the necessity of having to purge cold water from the return line. Of course, you may have noise issues in that cabinet, but at least it's inside.

I would with a Metland demand pump, but this is a bit different by design.

Plumbus · 02-28-2009, 06:29 PM

Quote:

Originally Posted by Tankless

I would with a Metland demand pump, but this is a bit different by design.

Other then the fact that your pump has to move at least .5 gpm (or in some cases .75 gpm) to fire the heater, how is this different? The pump would shut off when aquastat reaches set temp, thus shutting down the heater (if no hot water is being called for). However, you'd still have to account for the cold water sandwich when the pump is off and a hot tap turns on.

Tankless · 02-28-2009, 07:40 PM

Nope. I do my recircs a little different. Grundfos Aquastats are crap and do nothing with respect to tankless. My system is different. I Could do the pump on the other end, but I want the whole line 3/4". My pump will do about 3.5 gpm. The energy saved at putting the stat down line is not worth the hassle to me and it's more work than it needs to be.

para1 · 02-28-2009, 08:07 PM

ask HELGORE

Tankless · 02-28-2009, 08:26 PM

Para, you're a strange dude.

02-28-2009, 03:18 PM	#1
Tankless Always Something Join Date: Jun 2008 Location: Santa Barbara / Ventura Posts: 1,347 My Photos	Indoor / Outdoor OK, so I have a job that I am bidding. It's 2 tankless heaters with a recirc system. The pump and my electronics are not allowed...rather approved for outdoor installations. I was thinking of some kind of enclosure with a hinged door with an open bottom. What suggestions do you have? Mounting the pump / electronics under the house is a last resort and I really do not want to do that. There is a 75 gal in a tin house on the side of the furthest exterior wall. There is no recirc as of now, and opposite end is taking about 4.5 minutes for HW. The design is correct I just need to protect my pump / housing. Leaving the tin house is not an option. Looking for economical way of doing this because the rest of the job is gonna cost a boat load. I don't want to price myself out of the job for some eloborate housing. Was thinking 3/4" treated ply with a back against the stuccoo wall so I don't have to flash it. Advice? Thanks!

02-28-2009, 08:07 PM	#9
para1 Senior Member Join Date: Jun 2008 Location: D/FW, TEXAS Posts: 1,367 My Photos	ask HELGORE __________________ www.paradiseplumbinganddrains.com ft. worth plumber . plumber dallas . keller plumber . plumber benbrook. plumber arlington

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02-28-2009, 03:24 PM	#2
rocksteady Senior Member Join Date: Oct 2008 Location: Paso Robles, Ca. Posts: 2,510 My Photos	it may be kind of funkybut how about one of those smaller rubbermaid sheds? they make the real shallow ones that people install right on the side of their house, much like the tin doghouse that's already there. it'll look a little better i think and it's water proof. otherwise, i think you'd need to build something. paul

02-28-2009, 03:26 PM	#3
rocksteady Senior Member Join Date: Oct 2008 Location: Paso Robles, Ca. Posts: 2,510 My Photos	maybe something like this. you'd have to customize it a little bit but it'd save a ton of time. paul

02-28-2009, 03:33 PM	#4
Plumbus Senior Member Join Date: Aug 2008 Location: San Francisco Peninsula Posts: 362 My Photos	How about mounting the pump in a cabinet at the far end of the loop? Put an aquastat on it and it will shut down when it's hot, negating the necessity of having to purge cold water from the return line. Of course, you may have noise issues in that cabinet, but at least it's inside.

02-28-2009, 04:09 PM	#5
Plumber Plumba Join Date: Jan 2009 Posts: 890 My Photos	Ask the homeowner what they would prefer? Maybe they have their own ideas.

02-28-2009, 07:40 PM	#8
Tankless Always Something Join Date: Jun 2008 Location: Santa Barbara / Ventura Posts: 1,347 My Photos	Nope. I do my recircs a little different. Grundfos Aquastats are crap and do nothing with respect to tankless. My system is different. I Could do the pump on the other end, but I want the whole line 3/4". My pump will do about 3.5 gpm. The energy saved at putting the stat down line is not worth the hassle to me and it's more work than it needs to be.

02-28-2009, 08:26 PM	#10
Tankless Always Something Join Date: Jun 2008 Location: Santa Barbara / Ventura Posts: 1,347 My Photos	Para, you're a strange dude.