Application, Operation, & Maintenance Manual

DXM2 UNIT CONTROLS

Heat Controller, Inc.

DXM2 Controls

setback is not connected and NSB is connected to Ground “C”, then if OVR is momentarily connected to 24VAC (minimum 1 second) then the OVR input is recognized as a Night Setback Override signal and the DXM2Control reverts from Night Setback and begins monitoring thermostat inputs for heating and cooling calls for a 2 hour override period. If NSB is connected to ground “C”, then if OVR is continuously connected to 24VAC, then the OVR input is recognized as a call for NLL Staged Heating and the control enters NLL Staged Heating.

ESD – ESD is the input for Emergency Shutdown Mode. When the ESD input is connected to Ground “C”, all inputs are ignored and all outputs are turned off. There will be a random start timer when coming back from ESD.

H – The H input function is determined by the setting of DIP2.7, assuming the control is not controlling a internal flow center or an accessory relay is not configured for Whole House Dehumidification or humidifier operation.

If DIP2.7 = on then the H input is defined as Automatic Dehumidification Mode and is used as an “automatic”

Table 5: System Inputs with the resulting demand.

Table 5 describes demand changes with differing system input (ESD, NSB, OVR) and DIP input settings. Resulting Demand #1 is derived from Table 4.

Resulting Demand

System Inputs

 

Resulting

 

 

 

NSB Type

Demand #2

#1 (From Table 4)

ESD

NSB

OVR

 

(After ESD, NSB)

 

 

 

 

 

 

 

 

-

X

-

-

-

ESD

 

 

 

 

 

 

Invalid

-

-

-

-

Invalid

 

 

 

 

 

 

All (Excluding Invalid)

-

-

-

-

All (Excluding Invalid)

 

 

 

 

 

 

All (Excluding Invalid)

-

-

M

-

All (Excluding Invalid)

 

 

 

 

 

 

C1, C2

-

-

X

-

Invalid

 

 

 

 

 

 

OFF, F, H1, H2, or H3

-

-

X

-

NLL Staged Heating

 

 

 

 

 

 

EH

-

-

X

-

EH

 

 

 

 

 

 

All (Excluding Invalid)

-

X

-

Mechanical

Standby/OFF

 

 

 

 

 

 

 

 

 

 

 

All for 2 hours and

All (Excluding Invalid)

-

X

M

Mechanical

then revert to Stand-

by/OFF (Excluding

 

 

 

 

 

 

 

 

 

 

Invalid)

 

 

 

 

 

 

C1, C2

-

X

X

Mechanical

Invalid

 

 

 

 

 

 

OFF, F, H1, H2, or H3

-

X

X

Mechanical

NLL Staged Heating

 

 

 

 

 

 

EH

-

X

X

Mechanical

EH

 

 

 

 

 

 

All (Excluding Invalid)

-

X

-

Digital /

All (Excluding Invalid)

Comm

 

 

 

 

 

 

 

 

 

 

 

All (Excluding Invalid)

-

X

M

Digital /

All (Excluding Invalid)

Comm

 

 

 

 

 

 

 

 

 

 

 

C1, C2

-

X

X

Digital /

Invalid

Comm

 

 

 

 

 

 

 

 

 

 

 

OFF, F, H1, H2. or H3

-

X

X

Digital /

NLL Staged Heating

Comm

 

 

 

 

 

 

 

 

 

 

 

EH

-

X

X

Digital /

EH

Comm

 

 

 

 

 

 

 

 

 

 

 

“M” is momentary input “X” is continuous input

counterpart to DIP1.5, meaning if H is connected to 24VAC then the selected fan outputs will operate using dehumidification speeds and airflow settings for cooling. If H is not connected to 24VAC then the selected fan outputs will operate using normal speeds and airflow settings for cooling.

If DIP2.7 = off then the H input is defined as High Speed Fan input and is used as an input to call for High Speed Fan. If the control is in normal operating modes such as Standby, Cooling or Heating AND the H input is connected to 24VAC, then the selected fan outputs will operate using high speed, or high speed airflows at all times (this operation is a high speed fan version of the G input).

Other Outputs

Electric Heat – Outputs EH1 and EH2 turn on whenever the DXM2 Control is in the following modes: Heating Stage 3, Emergency Heat, and Boilerless Operation.

Status LED – The Status LED is green. The Status LED indicates the operating status of the DXM2 Control. See Table 4: “LED and Alarm Relay Operation”.

Fault LED – The Fault LED is red. The Fault LED displays the current operating status of the control, or flashes the corresponding code for the last fault that has occurred

if the test mode is active. If there is no fault in memory, then the Fault LED will flash Code 1. If the Fault type is “Primary” (HP, LP, LT1, LT2, or CO) then the Fault type will always be retained in memory (Primary faults will overwrite Secondary faults). If the Fault type is “Secondary” (Over/

Table 6: "H" input with resulting demand modes.

Table 6 describes demand changes with “H” input and DIP 2.1-2.3, and 2.7 settings. Resulting Demand #2 is derived from Table 5.

Resulting Demand

H

Auto Dehum / F2

Resulting Demand # 3 (After

#2 (From Table 5)

DIP 2.7

DIP 2.1-2.3, 2.7 Logic)

 

 

 

 

 

Standby/OFF

X

Auto Dehum Mode

Standby/OFF with Auto

 

 

 

 

Dehum enabled

 

 

 

 

 

 

 

Standby/OFF

X

High Fan Mode

F2

 

 

 

 

F1

X

Auto Dehum Mode

F1 with Auto Dehum enabled

 

 

 

 

F1

X

High Fan Mode

F2

 

 

 

 

C1

X

Auto Dehum Mode

C1 with fan destage

 

 

 

 

C1

X

High Fan Mode

*Cooling with High Fan

 

 

 

 

C2

X

Auto Dehum Mode

C2 with fan destage

 

 

 

 

C2

X

High Fan Mode

*Cooling with High Fan

 

 

 

 

H1

X

Auto Dehum Mode

H1

 

 

 

 

H1

X

High Fan Mode

Heating with High Fan

 

 

 

 

H2

X

-

H2

 

 

 

 

H3

X

-

H3

 

 

 

 

EH

X

-

EH

 

 

 

 

Invalid

-

-

Invalid

* = signifies that High Fan is locked on regardless of any Dehum demands

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Heat Controller DXM2 manual Other Outputs, System Inputs with the resulting demand

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.