Resideo R845A1030 Relay
The Resideo R845A1030 functions as a mission-critical hydronic switching relay designed for demanding multi-zone boiler applications. This DPST switching relay features an integral transformer providing 24Vac current to power two-wire or three-wire thermostats, including modern Smart Thermostats with C-wire requirements. The double-pole single-throw configuration allows for simultaneous control of a line-voltage circulator pump and a low-voltage burner circuit or boiler T-T terminals. With a 120V primary power supply and robust enclosed intermediate relay design, it simplifies complex wiring in hybrid systems. This unit is the industry standard for zoning with circulators, providing dependable isolation between high and low voltage components to prevent board damage. Contractors frequently utilize the Resideo R845A series for its reliable 24Vac coil rating and straightforward integration into existing hydronic architectures, ensuring consistent circulator pump control and system efficiency in residential and light commercial settings.
Key Technical Benefits:- Internal 40VA Transformer: Eliminates the need for external power supplies by providing 24Vac directly to the thermostat interface.
- DPST Switching Action: Provides one line-voltage pole for the circulator and one low-voltage pole for the boiler controller.
- Multi-Wire Compatibility: Engineered to support standard 2-wire setups and 3-wire power-stealing or powered thermostat configurations.
- NEMA Enclosure: Includes a durable metal housing with multiple knockouts for flexible conduit entry and secure component protection.
- Field-Serviceable Design: Compact footprint allows for easy installation in tight mechanical rooms or side-mounting on boiler jackets.
Can the R845A1030 power a Wi-Fi thermostat?
Yes, the internal transformer provides sufficient 24Vac power. Ensure the C-wire is properly landed on the designated terminal within the relay enclosure.
What is the maximum amperage for the circulator loop?
The line voltage contacts are rated for high-inrush loads, making them suitable for standard fractional horsepower hydronic circulators used in residential zoning.
Is this relay compatible with 3-wire thermostats?
This model is specifically designed to work with both 2-wire and 3-wire thermostat configurations, including those requiring a constant common for digital displays.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $121.62
-65%$121.62
$42.57Resideo R845A1030 Relay
The Resideo R845A1030 functions as a mission-critical hydronic switching relay designed for demanding multi-zone boiler applications. This DPST switching relay features an integral transformer providing 24Vac current to power two-wire or three-wire thermostats, including modern Smart Thermostats with C-wire requirements. The double-pole single-throw configuration allows for simultaneous control of a line-voltage circulator pump and a low-voltage burner circuit or boiler T-T terminals. With a 120V primary power supply and robust enclosed intermediate relay design, it simplifies complex wiring in hybrid systems. This unit is the industry standard for zoning with circulators, providing dependable isolation between high and low voltage components to prevent board damage. Contractors frequently utilize the Resideo R845A series for its reliable 24Vac coil rating and straightforward integration into existing hydronic architectures, ensuring consistent circulator pump control and system efficiency in residential and light commercial settings.
Key Technical Benefits:- Internal 40VA Transformer: Eliminates the need for external power supplies by providing 24Vac directly to the thermostat interface.
- DPST Switching Action: Provides one line-voltage pole for the circulator and one low-voltage pole for the boiler controller.
- Multi-Wire Compatibility: Engineered to support standard 2-wire setups and 3-wire power-stealing or powered thermostat configurations.
- NEMA Enclosure: Includes a durable metal housing with multiple knockouts for flexible conduit entry and secure component protection.
- Field-Serviceable Design: Compact footprint allows for easy installation in tight mechanical rooms or side-mounting on boiler jackets.
Can the R845A1030 power a Wi-Fi thermostat?
Yes, the internal transformer provides sufficient 24Vac power. Ensure the C-wire is properly landed on the designated terminal within the relay enclosure.
What is the maximum amperage for the circulator loop?
The line voltage contacts are rated for high-inrush loads, making them suitable for standard fractional horsepower hydronic circulators used in residential zoning.
Is this relay compatible with 3-wire thermostats?
This model is specifically designed to work with both 2-wire and 3-wire thermostat configurations, including those requiring a constant common for digital displays.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Resideo R845A1030 functions as a mission-critical hydronic switching relay designed for demanding multi-zone boiler applications. This DPST switching relay features an integral transformer providing 24Vac current to power two-wire or three-wire thermostats, including modern Smart Thermostats with C-wire requirements. The double-pole single-throw configuration allows for simultaneous control of a line-voltage circulator pump and a low-voltage burner circuit or boiler T-T terminals. With a 120V primary power supply and robust enclosed intermediate relay design, it simplifies complex wiring in hybrid systems. This unit is the industry standard for zoning with circulators, providing dependable isolation between high and low voltage components to prevent board damage. Contractors frequently utilize the Resideo R845A series for its reliable 24Vac coil rating and straightforward integration into existing hydronic architectures, ensuring consistent circulator pump control and system efficiency in residential and light commercial settings.
Key Technical Benefits:- Internal 40VA Transformer: Eliminates the need for external power supplies by providing 24Vac directly to the thermostat interface.
- DPST Switching Action: Provides one line-voltage pole for the circulator and one low-voltage pole for the boiler controller.
- Multi-Wire Compatibility: Engineered to support standard 2-wire setups and 3-wire power-stealing or powered thermostat configurations.
- NEMA Enclosure: Includes a durable metal housing with multiple knockouts for flexible conduit entry and secure component protection.
- Field-Serviceable Design: Compact footprint allows for easy installation in tight mechanical rooms or side-mounting on boiler jackets.
Can the R845A1030 power a Wi-Fi thermostat?
Yes, the internal transformer provides sufficient 24Vac power. Ensure the C-wire is properly landed on the designated terminal within the relay enclosure.
What is the maximum amperage for the circulator loop?
The line voltage contacts are rated for high-inrush loads, making them suitable for standard fractional horsepower hydronic circulators used in residential zoning.
Is this relay compatible with 3-wire thermostats?
This model is specifically designed to work with both 2-wire and 3-wire thermostat configurations, including those requiring a constant common for digital displays.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
