Taco Bumble Bee Modes

Cheeze-Tech

Ran into a Taco BumbleBee HEC-2 on a residential system and was wondering the best mode to use. It is a cast iron boiler with 2 zones of beseboard. Piped direct from boiler to house (no primary/secondary piping). Right now it’s just set for constant speed which seems like a waste of a high tech pump if it can do more to improve the system. I’m doing a pm so I always like to make recommendations that improve things if I can.

SteveSan

I would say the DT mode is a good fit for your system. You can always call into Taco Tech Support @ 401-942-8000 we are here Mon-Fri 8am-5pm EST This is the IOM if you need to make a copy.

http://apps.taco-hvac.com/uploads/FileLibrary/102-435.pdf

Cheeze-Tech

Thanks greatly for your help.

hot_rod

Is the boiler running ODR?

Cheeze-Tech

No it is not. 2016 Weil McLain with the self delaying control.

Dave H_2

@Cheeze-Tech
I would ask the homeowner if setting were changed shortly after the system went in 4 years ago.
The BumbleBee was shipped in the Delta T mode or 20 degrees as default.

Dave H.

Cheeze-Tech

No changes since installed. Pump just wired into boiler control and set at speed 1. Guy retired after system installed.

Dave H_2

So you can easily drop it into Delta T mode as long as the sensors are there and strapped to the boiler supply and boiler return.

Enjoy
Dave H.