Controls

CXM Unit Controls

The CXM Unit Controls are microprocessor-based heat pump controllers designed to enhance the operation and safety of water source heat pumps. Key features include high and low refrigerant pressure protection, water coil low temperature cutout, condensate overflow sensor, anti-short cycle time delay, and options for advanced control features such as intelligent reset and fault memory【4:0†source】.

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Overview

The CXM Unit Control is a microprocessor-based heat pump controller designed for water source heat pumps, offering a range of features to enhance operational efficiency and safety. It includes standard features such as high and low refrigerant pressure protection, condensate overflow sensing, and anti-short cycle protection. Advanced functionalities include intelligent fault retry, multiple blower configurations, and RS-485 communication capabilities for interfacing with other controls. The CXM controller operates effectively in environments ranging from -40°F to 176°F and supports a variety of thermostat types. Its user-friendly design simplifies installation and troubleshooting, making it a reliable choice for heating and cooling applications.

Features

Standard Features

High and low refrigerant pressure protection
Water coil low temperature cutout
True 24VA thermostat signals
Thermostat inputs compatible with Triacs
Condensate overflow sensor
Anti-short-cycle time delay
Random start feature (5-80 seconds)
Alarm with selectable dry contact or 24VA
Water valve relay with compressor delay
Emergency shutdown capability

Configurable Options

High and low refrigerant pressure protection
Water coil low temperature cutout
True 24VA thermostat signals
Thermostat inputs compatible with triacs
Condensate overflow sensor
Anti-short-cycle time delay
Random start
Alarm (selectable dry contact or 24VA)
Water valve relay
Emergency shutdown
Intelligent reset
High and low voltage protection
Air coil low temperature cutout
Low temperature setpoint field select (water, antifreeze)
Electric heat control outputs
Service test mode
LED fault and status lights
Fault memory after reset
Unit performance sentinel
Harness-type factory wiring connections

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

CXM Unit Controls

Overview

Features

Standard Features

Configurable Options

Performance Specifications

Resources

97B0003N12

97B0012N02

(Installation) Wiring Procedures - Hard wiring of thermostat to CXM Unit Control for Residential Tranquility® Split Systems

CXM to Thermostat Wiring Diagram

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