
Daikin-McQuay 300056536 Tstat
The Daikin-McQuay 300056536 Tstat is a rugged, 2H/2C non-programmable thermostat designed for high-reliability performance in light commercial and industrial HVAC applications. Built as a direct replacement for 668375401, this unit ensures seamless integration into existing 24VAC control circuits without requiring complex reprogramming. It features a dedicated auto changeover (AutoCO) function, which automatically manages transitions between heating and cooling stages to maintain tight setpoint tolerances. The interface prioritizes technician-friendly operation with a high-contrast digital display and intuitive pushbutton controls, eliminating the complexity of menu-driven residential interfaces. Whether you are servicing a rooftop unit or a split system, this 2-heat/2-cool thermostat provides the multi-stage logic necessary for efficient compressor and auxiliary heat management. Its wall-mount footprint and standardized terminal designations (R, C, W1, Y1, W2, Y2, G, O) make it a "drop-in" solution for field service professionals looking to restore system operation with an OEM Daikin replacement part.
Key Benefits:- Multi-Stage Control: Supports 2-stage heating and 2-stage cooling, making it compatible with a wide array of multi-stage heat pumps and conventional systems.
- Automatic Changeover: Advanced AutoCO logic maintains optimal space temperature by switching modes based on demand, reducing manual tenant interference.
- Hardwired Reliability: Operates on standard 24VAC (18-30V) power for permanent installation without the failure points of battery-only systems.
- OEM Compatibility: Specifically engineered as the verified 300056536 replacement for legacy 668375401 controls, maintaining original system specifications.
- Field-Proven Interface: Non-programmable design simplifies the user experience while preventing unauthorized schedule changes in commercial environments.
Is the 300056536 compatible with older 668375401 installations?
Yes, this is the official manufacturer-designated direct replacement for 668375401, utilizing the same mounting configurations and wiring logic for a hassle-free swap.
Does this thermostat support heat pump applications?
Absolutely. The 2H/2C configuration allows for 2-stage heat pump operation, including auxiliary heat management and reversing valve control via the O/B terminal.
How does the auto changeover feature function?
The AutoCO mode allows the thermostat to monitor the room temperature and automatically activate either the heating or cooling stages depending on the deadband settings, ensuring the environment stays within the desired range without manual switching.
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: $218.67
-65%$218.67
$76.53Daikin-McQuay 300056536 Tstat
The Daikin-McQuay 300056536 Tstat is a rugged, 2H/2C non-programmable thermostat designed for high-reliability performance in light commercial and industrial HVAC applications. Built as a direct replacement for 668375401, this unit ensures seamless integration into existing 24VAC control circuits without requiring complex reprogramming. It features a dedicated auto changeover (AutoCO) function, which automatically manages transitions between heating and cooling stages to maintain tight setpoint tolerances. The interface prioritizes technician-friendly operation with a high-contrast digital display and intuitive pushbutton controls, eliminating the complexity of menu-driven residential interfaces. Whether you are servicing a rooftop unit or a split system, this 2-heat/2-cool thermostat provides the multi-stage logic necessary for efficient compressor and auxiliary heat management. Its wall-mount footprint and standardized terminal designations (R, C, W1, Y1, W2, Y2, G, O) make it a "drop-in" solution for field service professionals looking to restore system operation with an OEM Daikin replacement part.
Key Benefits:- Multi-Stage Control: Supports 2-stage heating and 2-stage cooling, making it compatible with a wide array of multi-stage heat pumps and conventional systems.
- Automatic Changeover: Advanced AutoCO logic maintains optimal space temperature by switching modes based on demand, reducing manual tenant interference.
- Hardwired Reliability: Operates on standard 24VAC (18-30V) power for permanent installation without the failure points of battery-only systems.
- OEM Compatibility: Specifically engineered as the verified 300056536 replacement for legacy 668375401 controls, maintaining original system specifications.
- Field-Proven Interface: Non-programmable design simplifies the user experience while preventing unauthorized schedule changes in commercial environments.
Is the 300056536 compatible with older 668375401 installations?
Yes, this is the official manufacturer-designated direct replacement for 668375401, utilizing the same mounting configurations and wiring logic for a hassle-free swap.
Does this thermostat support heat pump applications?
Absolutely. The 2H/2C configuration allows for 2-stage heat pump operation, including auxiliary heat management and reversing valve control via the O/B terminal.
How does the auto changeover feature function?
The AutoCO mode allows the thermostat to monitor the room temperature and automatically activate either the heating or cooling stages depending on the deadband settings, ensuring the environment stays within the desired range without manual switching.
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.
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Description
The Daikin-McQuay 300056536 Tstat is a rugged, 2H/2C non-programmable thermostat designed for high-reliability performance in light commercial and industrial HVAC applications. Built as a direct replacement for 668375401, this unit ensures seamless integration into existing 24VAC control circuits without requiring complex reprogramming. It features a dedicated auto changeover (AutoCO) function, which automatically manages transitions between heating and cooling stages to maintain tight setpoint tolerances. The interface prioritizes technician-friendly operation with a high-contrast digital display and intuitive pushbutton controls, eliminating the complexity of menu-driven residential interfaces. Whether you are servicing a rooftop unit or a split system, this 2-heat/2-cool thermostat provides the multi-stage logic necessary for efficient compressor and auxiliary heat management. Its wall-mount footprint and standardized terminal designations (R, C, W1, Y1, W2, Y2, G, O) make it a "drop-in" solution for field service professionals looking to restore system operation with an OEM Daikin replacement part.
Key Benefits:- Multi-Stage Control: Supports 2-stage heating and 2-stage cooling, making it compatible with a wide array of multi-stage heat pumps and conventional systems.
- Automatic Changeover: Advanced AutoCO logic maintains optimal space temperature by switching modes based on demand, reducing manual tenant interference.
- Hardwired Reliability: Operates on standard 24VAC (18-30V) power for permanent installation without the failure points of battery-only systems.
- OEM Compatibility: Specifically engineered as the verified 300056536 replacement for legacy 668375401 controls, maintaining original system specifications.
- Field-Proven Interface: Non-programmable design simplifies the user experience while preventing unauthorized schedule changes in commercial environments.
Is the 300056536 compatible with older 668375401 installations?
Yes, this is the official manufacturer-designated direct replacement for 668375401, utilizing the same mounting configurations and wiring logic for a hassle-free swap.
Does this thermostat support heat pump applications?
Absolutely. The 2H/2C configuration allows for 2-stage heat pump operation, including auxiliary heat management and reversing valve control via the O/B terminal.
How does the auto changeover feature function?
The AutoCO mode allows the thermostat to monitor the room temperature and automatically activate either the heating or cooling stages depending on the deadband settings, ensuring the environment stays within the desired range without manual switching.
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.












