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helpnewbeee
Hi guys
I'm installing two 2-port valves to make two radiator circuits for upstairs and downstairs. I've got a vaillant 837 plus combi, a honeywell st9500c 20 zone programmer, and two honeywell t6620b1008 room thermostats. And I've got a wiring centre
What wiring goes where?
I'm installing two 2-port valves to make two radiator circuits for upstairs and downstairs. I've got a vaillant 837 plus combi, a honeywell st9500c 20 zone programmer, and two honeywell t6620b1008 room thermostats. And I've got a wiring centre
What wiring goes where?