Honeywell HPSR106 added

Cju3

Hi everyone. I have a hydronic boiler. It was 1 zone working off the aquastat. Im looking to add a zone controller and 3 new circulators running off of it. Im just not sure if i can use the original aquastat, or i need a new one. The aquastat on there now is L8148 

HVACNUT

Sure you can.
In addition to the normal wiring for a zone panel, run (2) 14 ga. wires from ZR and ZC in the zone panel to ZR and ZC in the aquastat. 

Cju3

Cju3

This is the aquastat i have. Where do i run the c1 c2 and thermostat wires? Do both of those go somewhere into the zone controller? Thank you

HVACNUT

Sorry, L8148, not L8124.
If you're adding 3 zones and the existing zone is wired into the aquastat, then you need a 4 zone panel. Connect all 4 zones to the new zone panel. Then run 2 wire low volt from XX on the Zone panel to TT on the aquastat. 

EdTheHeaterMan

There are a few things to consider when adding circulator zones.
1. Are these zones existing radiators that will be isolated and piped separately from the boiler supply to the boiler return?

2. Are all the zones going to be complete new radiators and the existing one zone system be intact as one of the 4 zones?
2a. Depending on your answer to this query, you need to consider the shared piping. If each zone circulator can provide 4 Gallon Per Minute (GPM) flow per zone, can the shared handle 16 GPM?

3. Sometimes a combination of zone valves and circulators can be a better option

4. Sometimes 4 zone valves are a better choice.

Do you already own the Honeywell 6 Zone relay control? If that is the driving factor in selecting circulators for zoning, then you are making a design choice on purchasing a more expensive zoning device based on the wrong reason.

When zoning with circulators you need to add flow control devices of some type to prevent the water from circulation backwards in the remaining zones that are not calling for heat. That is 2 parts that are more expensive than purchasing one zone valve for the same purpose.

Just some ramblings from an old time Hydronics Guy.

Cju3

Each floor of the home i have run new baseboard heaters in a loop. So i have 3 floors with seperate supply and return. I have boiler piped with 1 1/4 to 3/4 branch. I have the 3 circulators with seperate flo chek valves. I just have no experience wiring the aquastat to the zone switching relay. The boiler was my friends. So its used but in good working shape. I even replaced the combustion liner. I had purchased the honeywell switching relay for $125 new . Thats only reason i picked this one. 

Cju3