• 120 volt/60 Hz/75 VA transformer
• 5 years warranty
• Auto-reset electronic fuse protection

Argo Industries R512-2

• 120 volt/60 Hz/75 VA transformer
• 5 years warranty
• Auto-reset electronic fuse protection

Argo Industries R512-4

• 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

Argo Industries R512-6

• 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

• Molded terminal numbers and circuit diagram on top of relay provide easy identification for wiring and checking system operation
• Open coil assures cooler operation
• Laminated magnet construction for higher efficiency
• Base designed for easy replacement of competitive relays
• Contact rating: 3 amp at 480 VAC, 6 amp at 208/240/277 VAC, 12 amp at 120 VAC full load; 18 amp at 480 VAC, 35 amp at 208/240/277 VAC, 60 amp at 120 VAC locked rotor; 10 amp at 480 VAC, 20.8 amp at 120/208/240/277 VAC resistive

Honeywell R540-20

• SPNO 240 VAC,
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  Motors & Armatures R540-55

Packard R540-50

• NEMA standard type"D" transformer (included) powers 24 VAC control systems
• Provides overload protection for transformer
• Convenient connections for thermostat and heating and cooling equipment wiring
• Mounts on standard 4 x 4" junction box
• Can be mounted in any indoor location without additional enclosure
• Relay is easily replaced without disturbing wiring
• Includes R8222B relay and enclosure
• Inrush - 20 VA maximum, 17 VA nominal, sealed - 10 VA maximum, 9 VA nominal
• NEMA Standard DC20-1992

Resideo R540-135

Packard R540-45

• Transformer powers low voltage control systems and provides overload protection
• Low voltage terminal board provides convenient connections for thermostat and heating and cooling equipment wiring
• Mounts on standard 4 x 4" junction box
• Relay is easily replaced without disturbing wiring

Honeywell R8285D5001