- 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
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