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Quick question re end switches...

ratio
ratio Member Posts: 4,150
edited February 2021 in Radiant Heating
I've got a 4-port manifold with two zones of two loops each. Would you put the end switches in series to prove both open before allowing the boiler to run, or parallel for partial output even under an actuator fault condition? The boiler is a 4:1 modcon, the load is a car warsh so comfort isn't a concern. <edited typos>

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