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Boiler's Fixed Differential Causing Short Cycling

plumbingshard
plumbingshard Member Posts: 3
in Oil Heating
I've got a Viessmann Vitola 200 V22 with a KW10 contol with outdoor reset.    Its firing for 3-4 minutes about 6x per hour, which seems crazy to me.  I can't find anything in the install manual suggesting settings/dip switches that would allow me to increase the differential.
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