Heat Controller, Inc.

DXM2 UNIT CONTROLS

Application, Operation, & Maintenance Manual

DXM2 Controls

will change to the appropriate Heating Stage 3 airflow. With continuing Heating Stage 3 demand, EH2 will turn on after 10 minutes. EH1 and EH2 are turned off immediately when the Heating Stage 3 demand is removed, and the control reverts to Heating Stage 2 Mode. During Heating Stage 3 Mode, EH2 will be off (or will turn off if already on) if LT1 is greater than 45°F AND LT2 is greater than 110°F (LT2 greater than 110°F includes the condition that LT2 is shorted). This condition will have a 30-second recognition time.

Emergency Heat - In Emergency Heat Mode, the selected fan output(s) will be activated at high speed or the appropriate airflow for Emergency Heat, and EH1 is turned on immediately. With continuing Emergency Heat demand, EH2 will turn on after 5 minutes. EH1 and EH2 are turned off immediately when the Emergency Heat demand is removed. The selected fan output(s) will turn off after the selected heating blower off delay and the control reverts to Standby Mode.

Cooling Stage 1 - In Cooling Stage 1 Mode, the selected fan output(s), Compressor, and RV relays are turned on immediately. If configured as Stage 2 (DIP1.2 = off), then the compressor and fan will not turn on until there is Stage 2 demand. The Compressor relay is turned off immediately when the Cooling Stage 1 demand is removed. The selected Fan output(s) will turn off after the selected cooling blower off delay, and the control then reverts to Standby Mode. The RV relay will remain on until there is a Heating demand. If there is a Master/Slave situation or a Dual Compressor situation, all Compressor relays and related functions will track with their associated DIP1.2.

Cooling Stage 2 - In Cooling Stage 2 Mode, the selected Fan output(s), Compressor, and RV relays remain on. The Compressor Speed relay is turned on, and multi–stage fan configurations switch to the appropriate operating speed for Cooling Stage 2 immediately. The Compressor Speed relay is turned off immediately when the Cooling Stage 2 demand is removed, and multi–speed fan configurations switch to the appropriate operating speed for Cooling Stage 1 immediately, and the control reverts to Cooling Stage 1 Mode. If there is a Master/Slave situation or a dual compressor situation, all compressor relays and related functions will track with their associated DIP1.2.

Night Low Limit (NLL) Staged Heating - In NLL Staged Heating Mode, the OVR input becomes active and is recognized as a call for Heating (OVR is an alternate means of calling for Heating Mode). In NLL Staged Heating Mode, the control will immediately go into Heating Stage 1 Mode with an additional 30 minutes of NLL demand, the control will go into Heating Stage 2 Mode. With an additional 30 minutes of NLL demand, the control will go into Heating Stage 3 Mode.

Blower Configurations – The DXM2 may be configured to operate several different blowers and blower configurations. The configurations include:

a)2 Speed PSC Blower – The default configuration of the DXM2 is to operate for a 2 Speed PSC blower, with the K1 relay operating as a blower enable relay, and the

K2 relay operating as a blower speed relay. With this configuration, the blower enable relay is momentarily de-activated when the blower speed relay is switched. For low speed blower operation (Constant Fan, Heating 1, Cooling 1, Cooling 2 with Dehumidification), K1

will be active and K2 will be inactive. For high speed blower operation (High Speed Constant Fan, Heating 2, Heating 3, Emergency Heat, Cooling 2), K1 and K2 will be active.

b)ECM Blower – If the DXM2 is configured for an ECM blower, OR an ECM blower is detected, the DXM2 will directly control an ECM blower using selected or default airflows for each operating mode. When operating an ECM blower, the K1 relay becomes a loop pump relay active anytime the compressor relay is active, and the K2 relay becomes a HWG pump relay.

c)Single Speed PSC Blower – If the DXM2 is configured for a single speed PSC blower, the K1 relay will operate as the blower relay, and the K2 relay becomes a HWG pump relay.

d)Dual Stage PSC Blower – If the DXM2 is configured for a dual stage PSC blower, the K1 relay will operate as a blower enable relay, and the K2 relay will operate as a blower speed relay. The dual stage PSC configuration operates very similar to the 2 Speed PSC, except the blower enable relay is not de-activated when the blower speed relay is switched.

e)No Blower – If the DXM2 is configured for no blower (TTS and TTP units), the K1 relay will become a loop pump relay and the K2 relay will become a HWG pump relay.

ECM Blower Operation – When the DXM2 is configured to operate an ECM Blower, or an ECM Blower is connected to the DXM2, the ECM blower will be directly controlled by the DXM2, with advanced operating features including:

a)Airflow Settings – The DXM2 allows the target airflow for each operating mode to be selected individually, within the allowable operating range.

b)Soft Start Ramping – During the first 2 minutes of blower operation during a heating or cooling demand, the ECM blower will ramp up to the selected target

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Heat Controller manual DXM2 Controls
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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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