Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Quick question re end switches...

ratio Member Posts: 3,174
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>