Navien CH-240 combi boiler

Old 10-25-18, 01:32 PM
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Navien CH-240 combi boiler

I have a Navien CH-240 combi boiler with a taco 4 zone controller cant get system to run from thermostat wired in to taco it opens valves but boiler wont go on, can anyone help.I have set switches in boiler and controller I am perplexed

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