Heat Controller, Inc.

DXM2 UNIT CONTROLS

Application, Operation, & Maintenance Manual

DXM2 Electronic Heat Pump Controls

DXM2 OVERVIEW

The manufacturer’s next generation control board, DXM2, is the geothermal industry’s first two-way communication.

The DXM2 electronic control is a robust, microprocessor based heat pump controller that is advanced and feature- laden for maximum application flexibility. The DXM2 Control has relay outputs for Compressor, Compressor Speed, Reversing Valve, Alarm Relay, and 2 configurable relays for Fan, Fan Speed, HWG Pump, and Loop Pump, and 2 configurable accessory relay outputs. For on board diagnostics, there are 2 LED’s to provide status indication.

There are inputs for safety pressure switches, low temperature protection thermistors, condensate overflow sensor, DIP switch selection inputs, thermostat inputs, night setback inputs, and emergency shutdown input. Additional configurable temperature sensor inputs are available that may be used for hot water, compressor discharge, leaving air, leaving water, and entering water temperature sensors.

The DXM2 has an RS485 communications port to interface with a communicating thermostat or other compatible controls.

DXM2 Controller Part Number:

17B0002N02 DXM2 Control Board

General Operating Parameters

The following are general operating parameters for the DXM2 Control:

•Operating Environment: -40°F to 176°F and up to 95% relative humidity, non-condensing.

•Storage Environment: -40°F to 185°F and up to 95% relative humidity, non-condensing.

Power Requirements

DXM2 only power draw -

•Normally 8 VA draw at 24VAC

•Maximum 12 VA draw at 24VAC. A dedicated 24VAC,

50-60Hz, 1Ph, 40VA transformer minimum is required for typical WSHP application.

Relay and Connection Contact Ratings

The following relays are mounted on the DXM2 Control:

•Compressor Relay: 40VA at 24VAC

•Compressor Speed Relay: 28VA at 24VAC

•Alarm Relay: 28VA at 24VAC

•Reversing Valve: 28VA at 24VAC

•Accessory Relay 1: 28VA at 24VAC

•Accessory Relay 2: 28VA at 24VAC

•Fan Enable / Loop Pump Relay: 1 HP at 240VAC

•Fan Speed / HWG Pump Relay: 1 HP at 240VAC

•Connection ratings on the DXM2 Control:

•‘A’ terminal: 20VA at 24VAC. Larger solenoid valve draw should be controlled with accessory relays.

Grounding

The control board must be grounded from one of the C terminals.

Basic Control Features

•Single or two–stage compressor control

•Anti-short cycle protection

•High pressure cut-out

•Loss of charge cut-out

•High and low voltage cut-outs

•Water coil low temperature cut-out

•Air coil low temperature cut-out

•Random start

•Status LED and Fault LED

•Reset lockout at unit or disconnect

•Condensate overflow sensor

•Intelligent fault retry

•Test Mode

•Multiple blower configuration options

•Electric heat outputs

•Accessory water valve connection

Advanced Control Features

•Direct control of ECM blower

•Intelligent hot water generator control

•Two accessory relays configurable for multiple applications

•Internal Flow Center output

•Proportional valve output

•Night setback with override capability

•Emergency shutdown capability

•Removable thermostat connector for ease of installation and service

•Accepts conventional heat pump (Y,O) or heat/cool (Y,W) thermostat types

•RS–485 port to interface with a communicating thermostat or other compatible controls

•Boilerless electric heat

•Configurable inputs and outputs for advanced functions

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Heat Controller manual DXM2 Electronic Heat Pump Controls, DXM2 Overview
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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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