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Author Topic: 0014 01 pump cartridge fail  (Read 8890 times)

mlappin

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Re: 0014 01 pump cartridge fail
« Reply #30 on: January 25, 2017, 10:33:59 PM »

Whether the pump is in the house or at the stove, the uphill / downhill will always cancel each out. (assuming pump getting proper feed water, etc)

Assuming there is no cavitation I presume? I tried the pump in the basement deal the first year I built my original stove, worked much better at the stove the second year, so much easier to get it bled as well.


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mlappin

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Re: 0014 01 pump cartridge fail
« Reply #31 on: January 25, 2017, 10:41:38 PM »

Do u have a mixing valve somewhere or does that cold antifreeze head right into the stove?

Nah, the snow melt is on the third secondary loop. The actual glycol is totally isolated from the stove water. I use a 30 FPHX for that. The glycol is in a self contained system with a one gallon reservoir I built out of a small air tank. The pump on the snow melt loop pulls directly out of the tank, on the outlet side it T’s off, one side of the T goes to the FPHX, the other to the cold side of a tempering valve, the outlet side of the FPHX goes to the hot side of the tempering valve. It’s set at 80 degrees which is all it takes if you start it before the snow gets more than an inch deep. I use another small circulator to pump stove water out of the primary loop to the other side of the FPHX. In the kitchen is a mechanical 0-12 hour timer, when it starts to snow turn the timer to however long its supposed to last, the timer leads goto a Taco Switching relay, when activated it turns on both pumps, one for the glycol, one for the secondary loop.
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Sachs Dolmar 112 and 120
Homemade skid steer mounted splitter, 30" throat, 5" cylinder
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HeatmasterSS dealer for Northern Indiana

RSI

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Re: 0014 01 pump cartridge fail
« Reply #32 on: January 25, 2017, 10:43:28 PM »

Yeah, I am sure cavitation has to make a difference in flow.

If someone has a stove that doesn't have a decent door on the back with easy access then I don't blame them for putting it in the house. My first boiler had a bolt on back panel and fiberglass bats that had to be taken out to make the pipe connections and then packed back in around them. I did not put the pump at the stove because it would have been miserable changing a pump. Just unhooking the pipes when I pulled the stove out was bad enough.
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aarmga

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Re: 0014 01 pump cartridge fail
« Reply #33 on: January 25, 2017, 10:43:44 PM »

The only thing I'm confused about is that even if the water is going downhill the pump is still pushing the water otherwise it would just gravity feed down to the basement but I get way more flow than that.
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mlappin

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Re: 0014 01 pump cartridge fail
« Reply #34 on: January 25, 2017, 10:49:26 PM »

Yeah, I am sure cavitation has to make a difference in flow.

If someone has a stove that doesn't have a decent door on the back with easy access then I don't blame them for putting it in the house. My first boiler had a bolt on back panel and fiberglass bats that had to be taken out to make the pipe connections and then packed back in around them. I did not put the pump at the stove because it would have been miserable changing a pump. Just unhooking the pipes when I pulled the stove out was bad enough.

I’m sure I had some cavitation going on with the pump in the basement, after moving it to the stove my temperature drop on a call for heat went down.
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aarmga

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Re: 0014 01 pump cartridge fail
« Reply #35 on: January 25, 2017, 11:00:09 PM »

Sounds like you have an amazing set up! Do u run your pump on demand or continuous?
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hondaracer2oo4

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Re: 0014 01 pump cartridge fail
« Reply #36 on: January 26, 2017, 06:28:33 AM »

Gravity(14 psi at sea level) pushes the water to the pump from the stove. The line between te stove and the pump have what is called friction loss which is the resistance to flow caused by the water riding near the sides if the pump.  As long as the friction loss on the intake side doesn't lower the gpm to the pump to a gpm less than the pump can pump out with the headloss on the discharge side you are fine.
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mlappin

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Re: 0014 01 pump cartridge fail
« Reply #37 on: January 26, 2017, 07:32:22 AM »

Sounds like you have an amazing set up! Do u run your pump on demand or continuous?

The pump for the shop loop is on high at all times, Logstor to the shop to a 70 plate, then 1 1/4” from the flat plate to the waste oil boiler. Both loops use a Grundfos 26-99 on high.

Running a Taco Delta T pump on the house loop, with no call for heat it runs very slow then ramps up to try to keep the temperature difference as close to 20 degrees as possible.

Running a B&G 25 as well on the back of the G400 to make sure I have enough flow when the Delta T pump is on the slowest speed. Each G series has  a minimum flow to help prevent boiling, the newer ones come from the factory with a pump already installed just for circulation.

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Stihl 023
Stihl 362
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Sachs Dolmar 112 and 120
Homemade skid steer mounted splitter, 30" throat, 5" cylinder
Wood-Eze model 8100 firewood processor

HeatmasterSS dealer for Northern Indiana

aarmga

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Re: 0014 01 pump cartridge fail
« Reply #38 on: January 26, 2017, 06:08:04 PM »

It's almost scary to think how far advanced that stove is than what I have.
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Stihl 211 - 16"
Remington Rodeo Pro - 20"
Stihl 661r magnum - 36"
SpeeCo 22 Ton Honda splitter
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