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 SR506-4 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 #:SR506: Replaces Part #:'s : ERSR601,
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Taco SR506

Sealed Unit Parts SPG1401GE 6 Hour 25 Minute Defrost Timer

• GE WR9x480, Gemline CC923, Maytag R0168026 Every 6 Hours/25 Mins,
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  Sealed Unit Parts SPG1401GE

Taco SR120-001RP Line voltage Plug-In Cube Replacement Switching Relay, 120 volt

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Taco SR120-001RP

Taco SR504-ExP-1 Formed Sheet Metal 4-Zone Switching Relay with Priority, 24 volt Power Input or Output Terminal, 120 VAC Transformer Input, DPDT

• External indicator lights
• Switchable priority
• Simplified wiring
• Fully enclosed snap-out relays
• Compact design
• Fuse protected
• 100% factory tested
• Isolated end switch
• Contractor friendly PC board layout
• Universal thermostat compatibility
• Plug-in power port card slots
• Add-on power control plug
• Interface with ExP zone valve controls
• Extended 3 years warranty
• (3) power port slots, (1) power control plugs

Sid Harvey Item #:SR504ExP: Replaces Part #:'s : 6C632,
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Taco SR504EXP

Taco SR024-001RP Replacement Switching Relay, 24 volt

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  Taco SR024-001RP

Sealed Unit Parts SxT100R Breaker Type Control Transformer, 100 VA, 120/208/240/480V Primary, 24V Secondary

• A multitude of primary and secondary combinations

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Sealed Unit Parts SXT100R

Features

Meets The ARI 780/790 Standard

Accepts Auxiliary Switch

Universal metal mounting plate allows for complete ease of replacement

Long electrical life; tested to 250,000 cycles

Reliable mechanical life; tested to 1,000,000 cycles

EE magnet assembly assures optimal performance without sacrificing power consumption

Superior copper coil

Performance unaffected by mounting position

Flexible termination options suitable for various applications

Dust-free internal constructions

Packard TMX390C2

Functional Devices TR75VA005 Transformer, 480/240/208/120 VAC, 24 VAC, 75,
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Functional Devices TR75VA005

Honeywell AT72D1048 Transformer, 40 VA, 120 VAC Primary, 26.5V Open Circuit Secondary, 50/60 Hz

• Override protection
• Including thermostats, gas valves and relays
• Energy limiting

Sid Harvey Item #:T394-75: Replaces Part #:'s : 1C906,

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Honeywell T394-75

Honeywell T394-82 Transformer

• 40 VA Primary Volts 208/240 VAC Secondary Volts 24 VAC,
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  Honeywell T394-82

Honeywell AT87A1106 Transformer, 48 VA, 120/208/240 VAC Primary, 24 VAC, 26.5V Open Circuit Secondary, 50/60 Hz

• Includes built-in protection, primary winding burnout
• Overload protection provided

Sid Harvey Item #:T394-65: Replaces Part #:'s : 12153,

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Honeywell T394-65