Argo Industries Z140 1-Zone Ice Cube Relay, 120 VAC, 7.2 amp, DPDT

• 120 volt/60 Hz/40 VA transformer
• 5 years warranty
• Auto-reset electronic fuse protection

Sid Harvey Item #:R512-10: Replaces Part #:'s : 5C905,
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Taco SR501-4 1-Zone Switching Relay, 120 VAC at 60 Hz, 12 amp

• External indicator lights
• Universal replacement
• Snap-in PC board
• Simplified wiring
• Fuse protected outputs
• 100% factory tested
• Contractor friendly PC board layout
• Universal thermostat compatibility
• All circulator relay connections rated 1/3 HP (6 amp full load, 36 amp locked rotor) at 120 VAC
• Thermostat connection supplies a 24 VAC class 2 output

Sid Harvey Item #:SR501: Replaces Part #:'s : 5C955,
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Taco SR501

Argo Industries Z209 2-Zone Ice Cube Relay with Priority, 7.2 amp Full Load, DPDT

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

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Taco SR502-4
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Taco SR502-4

Arzel PAN-AB002 2-Zone Zone Control Panel

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Argo Industries Z210 3-Zone Ice Cube Relay with Priority, 7.2 amp Full Load, DPDT

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

Sid Harvey Item #:R512-4: Replaces Part #:'s : 5C910,
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Argo Industries R512-4

Taco zone valve controls work with two, three or four wire zone valves. Fully fuse protected, they also include two isolated end switches and a built-in priority switch. The contractor friendly PC board layout eliminates the problems caused by incorrect wiring and the"unfinished" look of conventional zone valve installations.

• External indicator lights
• Switchable priority
• Simplified wiring
• Compact design
• Fuse protected
• Two isolated end switches
• Extra set of dry contacts
• Contractor friendly
• PC board layout
• Universal thermostat compatibility
• 2 Power port slots

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Taco ZVC403

Taco zone valve controls work with two, three or four wire zone valves. Fully fuse protected, they also include two isolated end switches and a built-in priority switch. The contractor friendly PC board layout eliminates the problems caused by incorrect wiring and the"unfinished" look of conventional zone valve installations.

• External indicator lights
• Switchable priority
• Simplified wiring
• Compact design
• Fuse protected
• Two isolated end switches
• Extra set of dry contacts
• Contractor friendly
• PC board layout
• Universal thermostat compatibility
• 2 Power port slots

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Taco ZVC404

Taco SR503-4 switching relay is the best choice for all your zoning needs, with advanced powerport cards, external diagnostic lights, switchable priority and contractor friendly PC board layouts. Combined with the time proven reliability of the 00 family of circulators and thermostats, total system integrating is achieved. External indicator lights provide instant diagnostic feedback, making a snap of service calls or new installation start-ups.

• External indicator lights
• Switchable priority
• Priority protection
• Simplified wiring
• Sealed relays
• Fuse protected outputs
• Compact design
• 100% factory tested
• Isolated end switch
• Contractor friendly PC board layout
• Universal thermostat compatibility
• All circulator relay connections, including ZC/ZR, are rated 1/3 HP (6 amp full load, 36 amp locked rotor) at 120 VAC
• End switch connections are rated 24 VAC, 1 amp
• All thermostat connections supply a 24 VAC class 2 output

Sid Harvey Item #:SR503: Replaces Part #:'s : ERSR301,
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Taco SR503

Taco switching relays combine clearly labeled PC board layouts with advanced features that allow for total system customization. Whether using basic priority switching or the advanced features of the -ExP controls, the job is made easy. External indicator lights provide instant diagnostic feedback, making a snap of service calls or new installation start-ups.

• Front external indicator lights
• Ideal for retrofitting
• Primary circulator output
• Simplified wiring
• Sealed relays
• Fuse protected
• Compact design
• 100% factory tested
• Two isolated end switches
• Contractor friendly PC board layout
• Universal thermostat compatibility
• All circulator relay connections, including ZC/ZR, are rated 1/3 HP (6 amp full load, 36 amp locked rotor) at 120 VAC
• End switch connections are rated 24 VAC, 1 amp
• All thermostat connections supply a 24 VAC class 2 output
• Plug-in power controls

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Taco SR503-EXP-4

Argo Industries ARM-4P 4-Zone Switching Relay, 120 VAC, SPST

• 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

Sid Harvey Item #:R512-8: Replaces Part #:'s : 5C908,

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Argo Industries R512-8

Mars potential relay service kit has become an industry standard since its introduction over fifty years ago. Its long-term reliability and easy replacement have been the key to its success. The wide calibration ranges and the universal bracket make the Mars potential relay service kit a must on every service truck.

• Genuine Mars relays replace thousands of OEM models
• Non-positional
• Wide range of selectivity
• QC-6 Kit included with each relay to convert screw-on to push-on
• Instructions and wiring diagram included
• Universal break-off bracket on each relay
• Simply snap-off parts not needed

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