Thermostats

ATA22U01

The ATA22U01 thermostat provides two-stage, non-programmable temperature control for 24V water-source heat pump systems. Key features include configurable automatic or manual changeover operation, LED status indicators, zero temperature droop performance, and a setpoint range of 50°F to 90°F【4:2†source】.

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Overview

The ATA22U01 electronic thermostat is designed for two-stage heating and cooling control in 24V water-source heat pump systems. It features selectable system modes including Heat, Off, Cool, Emergency Heat, and Auto, along with fan options for continuous operation. The thermostat supports both Fahrenheit and Celsius temperature displays, and it has configurable automatic or manual changeover capabilities. Additional features include a fault LED for alarm status, installer setup options for customization, and zero temperature droop performance. Setpoints are retained in memory without batteries and during power outages, ensuring reliable operation.

Features

Standard Features

Heat-Off-Cool-Em Heat-Auto system selections
Fan-On-Auto selections
°F or °C temperature display
Configurable automatic or manual changeover operation
Light emitting diode (LED) for alarm status
Installer setup options allow for customized applications
Zero temperature droop performance
Temperature display adjustment feature provides display offset for custom applications
Setpoints are permanently held in memory (no batteries used) and retained during power outages
Extended fan operation feature can be used to operate fan for 90 seconds after 'Y' turns off

Configurable Options

The ATA22U01 electronic thermostat provides two-stage, non-programmable temperature control for 24V water-source heat pump systems.
Heat-Off-Cool-Em Heat-Auto System selections.
Fan-On-Auto selections.
°F or °C temperature display.
Configurable automatic or manual changeover operation.
Light emitting diode (LED) for alarm status.
Installer setup options allow for customized applications.
Zero temperature droop performance.
Temperature display adjustment feature provides display offset for custom applications.
Setpoints are permanently held in memory (no batteries used) and retained during power outages.

Performance Specifications

Performance specifications not applicable to this product.

Resources

“With our research, ClimateMaster is number one. We don’t have any outside units—you can sit on the back porch without the unit clicking on or the fan running in the summertime. This being my last house, we really checked into geothermal, and it’s been the perfect solution.”

BrentHomeowner

“Now I’ve got a certified home that is 78% more energy efficient than my neighbors and 48% more efficient than new builds on the market today. I’m saving about $1,750 to $1,800 a year, and as a bonus, I get free hot water as a byproduct of my geothermal system. It’s quiet—I can hear my neighbors’ air source heat pumps, but they don’t hear mine.”

ChadResidential Professional & Homeowner

“We have geothermal—our neighbors don’t, and I know they wish they did. It’s a clean heat, not as drying to the skin, and you can feel the difference. In 6.3 years, we’ll recoup our investment, and after that, it’s all savings. Just plain facts—it saves money. ClimateMaster was the right choice: professional, customer-oriented, and easy to work with.”

PamelaHomeowner

ATA22U01

Overview

Features

Standard Features

Configurable Options

Performance Specifications

Resources

Thermostat - ATA22U01 IOM (includes ATA11U01)

Thermostat - ATA11U01 IOM (includes ATA22U01)

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