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Mend Grasslin FM/1 STUH Home Heating Systems

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Mend Grasslin FM/1 STUH Boiler Heating Programmer

how to disarm a grasslin fm/1 stuh?

i have a grasslin fm/1 stuh clock running my ferroli tempra 18 boiler and want to wire up a honeywell programer i only have one black wire the switch wire but when i put it to n0 8 on the boiler connector it turns the boiler off. how do i disarm the grasslin and arm the honeywell

tony
February 2010
GrasslinGrasslin FM/1 STUHHeating, Home Heating SystemsBoiler Heating Programmer

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