Fig 5 and 6 clearly show those terminals
Fig 10 shows wiring for R845a
I agree, but alas, they do not exsist on box itself.
they are labed but there is no terminal screw for Zr or ZC.
on figure 10 on the upper left corner of the box for the controller is says "L7224"
figure 12 shows "L7248L" which shows no terminal screw for ZC. I don't see any diagram specifically indicating "L7248C"
here's a pic showing the labels for ZR and ZC but no terminal screws. Not sure how this this works but I need to step away for a bit. I'll leave this chat window open in hopes you can help.
Can you see my problem?
The only choice would be to too get new aquastat that has the right terminals other wise you can wire r845 as just relay and hope boiler has enough heat to heat zone