Azel SP-84 Four Zone Switching Relay with Selec-Priority for Hydronic Radiant Floor Heating Systems$$Tools & Hardware Other

Hydronic Heating Switching Relay for 4 zones LED indicators on the front panel provides functional status and easy troubleshooting EZ screwless terminal blocks for connections to the thermostats Field selectable priority with timer prevents freeze-ups in the event of a priority zone failure A system circulator is turned on whenever any zone calls for heat Fuse protection Manual priority override(bypass) for each of the secondary zone Isolated End Switch and Priority End Switch for utilizing full functionality of high efficiency Mod-Con boilers