Burnham Revolution

Mark J Strawcutter

According to the specs, the Revolution has:

"Built in Injection Pump with Tekmar Injection Controller"
and
"Installed Primary/Secondary Water Manifold"

but from what I can see in the installation manual, there is a single "boiler pump" in the unit and you are instructed to install a "system circulator".

My understanding of P/S with injection would require 3 circs - boiler, system and injection loop.

What are they doing that they only need 2?

Mark

Unknown

Mark

The Revolution has a built-in bypass that connects the system return to the system supply. Branched into this bypass is the boiler return with it's variable speed injection pump and boiler supply with 10K sensor strapped on. If the boiler supply water temperature is below 150°F, then the boiler injection pump will run at reduced speed to allow the boiler to heat up due to reduced flow of cool return water. As the boiler transitions through 160°F, the pump will speed up until it eventually reaches 100% speed. You need to supply a system pump or pumps and these need to be on the system supply. Below is a cutaway graphic of the principle behind this. Hope this helps.

Glenn Stanton

Burnham Hydronics

J.C.A._3

Simplicity !

Variable speed pump and a controller with "pump logic", depending on demand, and return temps.

What else could be more sensible? All the big control companies do it, just in diffefernt ways. Burnham avoids a dedicated mixing device for simple systems, while giving you the option to further modify the "zones" that need it. Chris