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Problem with Zone Synchronization

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ChrisF80
ChrisF80 Member Posts: 16
in Thermostats and Controls
Hello, I recently installed a Honeywell aquatrol aq25042b on my buderus oil fired boiler system. It is zoned with circulators. It had a basic Taco control panel that worked perfectly, I just wanted the extra features the aquatrol has. Mainly being the zone synchronization. The problem I am having is the control will not respond to any of the thermostats (digital lux) when the zone synchronization is enabled. If I turn off zone synchronization everything works just fine. Honeywell states that this feature will work with basic digital thermostats, and does not require there communicating thermostats. Anyone have any ideas? Thanks in advance

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  • Harvey Ramer
    Harvey Ramer Member Posts: 2,239
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    Sources from Honeywell tell me it will enable and start working if you leave it go long enough.
    I have not proved it.
    What's the longest you've left it in that position?
  • Robert O'Brien
    Robert O'Brien Member Posts: 3,541
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    How can it possibly synchronize with conventional thermostats?
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  • ChrisF80
    ChrisF80 Member Posts: 16
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    Not very long, 5 minutes the most. Robert, I'm not sure how but it clearly states it in the instructions and on their website.
  • Harvey Ramer
    Harvey Ramer Member Posts: 2,239
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    It's a "dumb synchronization" if you will. It waits till all zones are calling before energizing a demand. It then runs till each zone is satisfied. That's with conventional thermostats.
  • Robert O'Brien
    Robert O'Brien Member Posts: 3,541
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    I have an AQ with communicating stats, room sensors in reality and it works perfectly. I'd install them and lose the conventional stats
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  • HVACNUT
    HVACNUT Member Posts: 5,835
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    Is there a time delay on that? If one zone doesn't call, will it stack the other zones indefinitely? I ask because I went to a Tekmar course a few years back with the same technology, and I was turned off because there was no time lapse override.
  • ChrisF80
    ChrisF80 Member Posts: 16
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    Thanks all for your input. Robert, I was afraid you were correct, just didn't want the extra expense of replacing the stats. I'm sure it's worth it, my burner short cycles horribly with zones calling at separate times. Now to convince the wife.

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