Hello, I'm having a few problems with the wiring,...I have a Navien NCB240 and have recently tried connecting the taco zvc using the instruction sheet. I can't figure out why my sentry zone valves are not working correctly, when I hook up the four wires 1234 thermo calls for heat green light blinks boiler comes on and pump, valve closes,( these are normally open valves,) light stops blinking, pump shuts down boiler shuts down valve opens. When I hook up only 1 and 2 of the sentry and jumper 3 and 4 at the taco box it works properly. The other odd thing is when the post purge dip is switched to on, the priority zone is supposed to stay energized for two minutes after it's thermostat is satisfied but not operate the boiler,...In my case the boiler continues to run but the pump shuts down......Any ideas.?...Is it possible the two tt wires from the taco box to the boiler are reversed?