·2-Zone AR861-2II or 3-Zone AR861-3II
·Ice Cube Technology
- Plug-in Replacement Relays
·Switchable Priority
- Perfect for Indirect Water Heaters or Priority Zones
·Auto-Reset Electronic Fuse Protection - Eliminates Nuisance Service Calls
·15VA Transformer/Full 1/3HP Realy Load Rating
- Robust Components Provide Years of Trouble-free Service
·5-Year Warranty
- Strongest Protection Available