• Electronic fuse - auto reset
• Robust transformer - enough to handle up to 15 zones
• Double-sided printed circuit board construction - 100% factory tested for reliability
• Clearly marked terminals with clamping plates
• Separate xx (isolated switch) and ZC/ZR Relays protect boiler aquastat
• Priority safety timer - Ensures other zones get heat every 30 min and prevents freeze-ups
• 5 sec time delay for boiler shut-off
• Relay diagnostic light - easily seen through window on cover
• Premium plug-in replaceable relays
• 24 VAC transformer terminals
• Plug-in, add-on zone modules (AD-1 or AD-4)
• Switchable priority
• 1/3 HP high relay load rating

• Electronic fuse on transformer secondary protects transformer from excessive loading
• Data port terminal allows for an easy connection of the DPM-2 outdoor reset control
• Three second time delay for boiler shut-off
• For easy connection of 3 wire thermostats and field replacement of transformer
• Clearly marked terminals with clamping plates and plenty of room for wiring
• LED lights turn on when relay contacts are closed
• Switchable priority improves versatility
• With priority
• 0.085 amp thermostat
• 1/3 HP single phase motor rating
• SPST contact

Argo Industries R512-8