Buderus GB142 Multi Family / Retail

[cody350]

I can't take credit for any of the piping or much else....

I'm just the wiring and start up monkey!

GB142-60
7- Callefi "pop top" zone valves
2- Honeywell Wireless Pro6000 tstats
5- Honeywell Pro5000 tstats
Boiler Buddy
Grundfos Magna System Pump
Spirovent
100+ gallon indirect tank

Don't have any before pics, sorry. It was originally a cast iron boiler (constant temp) with 4 zones (pumps). We re-piped the entire boiler room and split up the system to make 7 zones as the four apartments upstairs were originally controlled by only 2 thermostats and two of the retail shops downstairs were controlled by 1 stat.

I thought this job turned out pretty well considering it was a bit of a rush.

Any critique?

[Wheelbaron]

looks nice
clean

[jlanesey]

That's a lot of gas man! How do they split up the gas bill?

Install looks nice and clean though.

Would have taken the five minutes to paint the board though.

[chuckcrj]

Nice clean boiler work!

Could have saved a pump by just using the buffer tank as your hydraulic seperation. I know, the low loss header comes with the boiler, which is why it always gets used.

[Joehvac25]

They want check valve right at tank, all four ports so no gravity flow.

[chuckcrj]

They want check valve right at tank, all four ports so no gravity flow.

No need for check valves. Gravity flow won't happen with zone valves on the supplies. Or did you mean something else?

[Joehvac25]

No need for check valves. Gravity flow won't happen with zone valves on the supplies. Or did you mean something else?

I have seen it go up the returns even. All the buffer tanks I've installed have 4 check valves right in the manual. I agree that with zone valves you won't get any after them. Not sure but maybe even the boiler side could a little also. If I'm wrong it won't offend me to school me chuck, I know you know your beans.

[rich pickering]

Couldn't afford a coat of paint on the plywood?

A boiler drain between the ball valve and the x-tank would be nice for service.

[chuckcrj]

I have seen it go up the returns even. All the buffer tanks I've installed have 4 check valves right in the manual. I agree that with zone valves you won't get any after them. Not sure but maybe even the boiler side could a little also. If I'm wrong it won't offend me to school me chuck, I know you know your beans.

I guess I don't understand why they would need any check valves in this application (other than the primary loop and the DHW loop of course). Gravity flow, if even possible on the boiler side, would not have any negative effect that I can think of.

But I've been wrong before!

[Joehvac25]

I guess I don't understand why they would need any check valves in this application (other than the primary loop and the DHW loop of course). Gravity flow, if even possible on the boiler side, would not have any negative effect that I can think of.

But I've been wrong before!

I guess at long off periods the highly insulated tank could lose heat and fire the boiler, but after a closer look there is no aquastat on the buffer tank so I guess that wouldn't be an issue. We set them up with outdoor reset and Teckmar control so the boiler maintains tank temperature. Not to hijack but here's one I did.

[chuckcrj]

I guess at long off periods the highly insulated tank could lose heat and fire the boiler, but after a closer look there is no aquastat on the buffer tank so I guess that wouldn't be an issue. We set them up with outdoor reset and Teckmar control so the boiler maintains tank temperature. Not to hijack but here's one I did.

Nice work!

[Joehvac25]

Nice work!

Thanks, I enjoy this stuff!

[jnsrose]

Do the install guys know you are putting up pictures of there work?