Heat Controller DXM2 manual Advanced Troubleshooting and Configuration Information, General

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Heat Controller, Inc.

DXM2 UNIT CONTROLS

Application, Operation, & Maintenance Manual

Advanced Troubleshooting and Configuration Information

General

To properly configure and troubleshoot advanced control features, and to aid in troubleshooting basic control features, a communicating thermostat or diagnostic tool with similar capabilities should be used.

System Configuration

All factory installed DXM2 controls have their basic configuration parameters set as part of the factory manufacturing and test process. The System Configuration option under the communicating thermostat Installer menu provides the installer with the ability to adjust ECM target airflows for each operating mode, set control options, setup the loop configuration and parameters, and configure field replacement controls.

Airflow Selection – The Airflow Selection menu allows the installer to adjust the ECM target airflow for each control operating mode, as well as independently set the heating and cooling blower off delays.

ECM Airflows – Independent airflow selections may be made for each stage of heating operation, each stage of cooling operation with and without dehumidification, as well as constant fan operation. The DXM2 control has set minimum and maximum airflow limits for each operating mode, based on the unit configuration that may not be changed.

Non-ECM Configuration – If the DXM2 is not configured to control an ECM blower, the airflow selections will not be available on the Airflow Selection menu.

Heating / Cooling Off Delays – The heating and cooling mode blower off delay times may be independently adjusted by the user. Each delay time may be set between 0 and 255 seconds.

Option Selection – The Option Selection menu allows the installer to set selected control options.

LT2 Setpoint – The LT2 setpoint should be set to ANTI- FREEZE ONLY when the unit is configured as a water-to- water unit with anti–freeze in the load side loop. For ALL other unit configurations, the LT2 setpoint should be set to

WATER.

Motorized Valve – The Motorized Valve option should be set to ON when a motorized water valve with end switch wired to the DXM2 Y1 is used with a communicating thermostat. For all other system configurations, the Motorized Valve option should be set to OFF.

Unit Configuration – Selections under the Unit

Configuration menu are normally set at the factory as a normal part of the manufacturing and test process. This menu allows the configuration to be modified for special applications, or to configure field replacement controls.

The Unit Configuration menu provides the ability to select the Heat Pump Family, Unit Size, Blower Type, and Loop Type. The Heat Pump Family, Unit Size, and Blower Type are needed to properly operate any particular unit configuration, especially those with ECM blowers.

Heat Pump Family – When replacing a control in the field, the Heat Pump Family value must be set for proper blower and loop operation. The valid family values (HEV/H and other Communicating units) are available for the user to scroll through to select the proper value.

Heat Pump Size – When replacing a control in the field, the Heat Pump Size value must be set for proper blower operation. After a Heat Pump Family has been selected, the valid Heat Pump Size values will be available for the user to scroll through to select the proper value.

Blower Type – When replacing a control in the field, the Blower Type value must be set for proper operation. The valid Blower Type values will be available for the user to scroll through to select the appropriate value from No Blower, ECM Blower, or PSC configurations.

Loop Configuration – When replacing a control in the field, the Loop Configuration value must be set for proper operation. The valid Loop Configuration values will be available for the user to scroll through to select the appropriate value from VS PUMP, MOD VALVE, or

OTHER.

Loop Configuration – The Loop Configuration menu allows the installer to set the operating parameters for either

an internal flow center, or a proportional water valve, depending on the unit configuration.

Heating Delta T – The Heating Delta T option allows the target delta T (EWT – LWT) value selection for operating in the heating mode. The DXM2 control has set minimum and maximum delta T limits that may not be changed. Cooling Delta T – The Cooling Delta T option allows the target delta T (LWT – EWT) value selection for operating in the cooling mode. The DXM2 control has set minimum and maximum delta T limits that may not be changed.

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Contents DXM2 Digital Heat Pump Controller Table of Contents DXM2 Overview DXM2 Electronic Heat Pump ControlsTest P12 DXM2 Physical Dimensions & LayoutP11 P10 DXM2 Layout and ConnectionsDIP Package #1 S1 DIP SwitchesDXM2 Controls Field Selectable InputsDIP Package #2 S2 DIP Package #3 S3Fault Codes Safety FeaturesLockout with Emergency Heat If the DXM2 is Unit Operation Description LED and Alarm Relay Output Table DXM2 Controls Special DXM2 Application Notes / Accessory Relays Thermostat Inputs With Resulting Demands System Inputs with the resulting demand Other OutputsDXM2 Sensors CommunicationsPressure Switches DXM2 Service & Application NotesThermostat Compatibility DXM2 Thermostat DetailsBasic Troubleshooting Information General Advanced Troubleshooting and Configuration InformationSystem Configuration Service Mode Start Troubleshooting Chart024 DXM2 Wiring Diagram Standard Installation 96B0005N56 Fault Htg Clg Possible Cause Solution Functional TroubleshootingESD ERV Fault DXM Only Symptom Htg Clg Possible Cause Solution Performance TroubleshootingDXM2 Unit Controls 2012

DXM2 specifications

The Heat Controller DXM2 is an advanced heating and cooling solution, meticulously designed for residential and commercial applications. This sophisticated unit integrates modern technologies to deliver superior climate control, ensuring comfort while maintaining energy efficiency. Among its standout features are its intuitive operation, flexibility in installation, and superior performance metrics.

One of the key attributes of the DXM2 is its advanced inverter technology, which allows for variable speed operation. This feature enables the system to adjust its output based on real-time cooling or heating demands, resulting in reduced energy consumption and lower utility bills. The inverter technology not only promotes efficiency but also enhances the system's operational longevity, as it reduces the wear and tear typically associated with traditional HVAC systems that operate at fixed speeds.

The unit boasts a user-friendly interface that allows for seamless control. With its advanced remote control and optional smartphone app connectivity, users can effortlessly adjust settings from anywhere, making it a perfect fit for today’s tech-savvy homeowners. This flexibility ensures that comfort can be customized according to personal preferences and schedules.

Additionally, the DXM2 is equipped with a multi-stage filtration system that actively removes dust, allergens, and other airborne particles, contributing to improved indoor air quality. This feature is particularly beneficial for individuals with allergies or respiratory issues, as it ensures cleaner air circulating throughout the living space.

The system’s whisper-quiet operation sets it apart from many competitors in the market. With noise levels comparable to a soft breeze, the DXM2 provides comfort without disruptive sounds, making it ideal for bedrooms, offices, and quiet spaces.

Moreover, the DXM2 offers enhanced durability and reliability due to its robust construction and high-quality components. The unit is designed to withstand harsh weather conditions and varying environments, ensuring consistent performance year-round.

Another noteworthy characteristic is its eco-friendly refrigerant, which aligns with contemporary environmental standards. This selection contributes to lower greenhouse gas emissions while maintaining efficiency and effectiveness in both heating and cooling modes.

In conclusion, the Heat Controller DXM2 is a prominent choice for anyone seeking a reliable and efficient climate control system. Its combination of advanced technology, customizable features, superior air quality management, and low noise levels positions it as a leader in the heating and cooling industry. Ultimately, the DXM2 is engineered to meet the demands of modern living, creating comfortable environments with unparalleled convenience and efficiency.
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