I'm back and replying to my own thread.
I studied the wire diagrams for both the aquastat and zone controler. They are contradicing when it comes to the line voltage source.
The aquastat shows that ZR and ZC are the hot and neutral 120V controled by the temperature relay that could provide the voltage to the zone controler and I verified that 120V is supplied once it reaches the set low limit. The zone controller has the ZR and ZC terminals but also has H and N for supply voltage. The diagram shows that if you add H and N you override the two Z's so the aquastat has no override.
My observation is something that TACO will need to explain as it is not clear on the use of the 4 terminals so I will call them in the AM. Until that happens I will disconnect the H and N and leave ZC and ZR connected to see what happens.