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zvc406-exp and hydro-stat 3250
Trying to figure out the correct wiring. My system is an oil fired boiler with tankless DHW coil and a 5 zone radiant setup. I have a circ on the boiler loop and another one on the radiant loop. Looking at the wiring diagrams below I've read that keeping the boiler loop wiring circ on the 3250 will enable me to keep the ODR and low water temp set point for the coil.
Is it correct to wire this using the single circulator on the 3250 wiring diagram? If that's true then my second question on the zvc side is now I will only have 1 pump to wire. If i want this one pump to only operate as the secondary pump option is that possible? Basically I want the radiant pump to operate except when the priority zone calls. The boiler pump will satisfy the priority zone.
Hope this makes sense. Thanks everyone!https://api.ferguson.com/dar-step-service/Query?USE_TYPE=INSTALLATION&PRODUCT_ID=4154363https://hydrolevel.com/wp-content/uploads/2015/12/HydroStat-3250-Plus-Inst.-final.pdf