Three-Zone Expandable Switching Relay, 120VAC

Features

• Amperage Rating: 7.2 A
• Frequency Rating: 60 Hz
• 30 VA transformer voltage
• Separate (isolated switch) and ZC/ZR relays protect boiler aquastat
• Double-sided printed circuit board construction: 100 % factory tested for reliability
• 30 VA transformer: robust enough to handle up to 15 zones
• Auto reset electronic fuse
• Priority safety timer: ensures other zones get heat every 30 min and prevents freeze-ups
• 5 sec time delay for boiler shut-off
• Premium plug-in replaceable relays
• 24 VAC transformer terminals
• Plug-in, add-on zone modules (AD-1 or AD-4)
• Switchable priority
• High relay load rating: 1/3 hp
• Clearly marked terminals with clamping plates
• Relay diagnostic light: easily seen through window on cover