Heat Controller, Inc.

DXM2 UNIT CONTROLS

Application, Operation, & Maintenance Manual

DXM2 Controls

to the compressor output. All other heat pump operating modes will operate normally, and the accessory relay will be off in all other operating modes.

Thermostat Inputs – Table 5 shows the resulting demand from differing combinations of inputs.

Y1 – Y1 is the input for compressor stage 1 if DIP1.3 = on. Y1 is the input for Cooling Stage 1 if DIP1.3 = off.

Y2 – Y2 is the input for compressor stage 2 if DIP1.3 = on. Y2 is the input for Cooling Stage 2 if DIP1.3 = off.

W – If Y1 and Y2 are active and DIP1.3 = on, then W is the input for Heating Stage 3. If Y1 and Y2 are not active and DIP1.3 = on, then W is the input for Emergency Heat. If DIP1.3 = off, then W is the input for Heating Stage 1.

O – O is the input for Reversing Valve Relay if DIP1.3 = on and DIP1.4 = on. O is the input for Heating Stage 2 if DIP1.3 = off. O is the input for “Heat Mode” if DIP1.3 = on and DIP1.4 = off; this means that the thermostat outputs a “B” call when in Heating Mode and does NOT have an “O” output. The DXM2 Control will employ “Smart RV” control. This ensures that the RV will only switch positions if the thermostat has called for a Heating/Cooling Mode change. G – G is the input for Constant Fan Operation.

NSB and Override – NSB is the input for Night Setback Mode. When Digital NSB is selected via the Accessory Relays Dipswitch inputs and the NSB input is connected to Ground “C”, then the appropriately configured Accessory Relay is turned on to signal the digital thermostat to

go to Night Setback Setpoints. Stated differently, when configured for Digital NSB Mode, the Accessory Relay directly tracks the NSB input.

Note: Digital Night Setback feature requires a compatible thermostat. Contact the manufacturer for information on compatible thermostats.

When Digital NSB is NOT selected via the Accessory Relays Dipswitch inputs and a communicating thermostat configured for night setback is not connected, when the NSB input is connected to Ground “C”, then Y1, Y2, W, O, and G inputs are ignored. During this time period, if OVR is momentarily connected to 24VAC, then Y1, Y2, W, O, and G are once again monitored for 2 hours. After the 2 hour override period, the DXM2 reverts back to ignoring Y1, Y2, W1, O, and G, assuming the NSB input is still connected to Ground “C”. There will be a random start timer when coming back from NSB Mode.

Note: The maximum number of DXM2Controls with daisy-chained “NSB” terminals is 75. Also, the maximum total wire resistance of the “NSB” wiring is 500 Ohms.

OVR – OVR is the input for Night Setback Override or Night Low Limit Staged Heating input (NLL). When Digital NSB is NOT selected via the Accessory Relays Dipswitch inputs and a communicating thermostat configured for night

Table 4: Thermostat Inputs With Resulting Demands

Thermostat Operating Modes

 

 

 

Input3

 

 

 

 

Output

 

 

Mode

 

 

 

 

 

 

 

 

 

 

 

 

O

G

Y1

Y24

W

H / DH

RV

Fan

1st stg

2nd stg

AUX

Reheat

 

 

H/C

H/C4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No Demand

ON/OFF

OFF

OFF

OFF

OFF

OFF

ON/OFF

OFF

OFF

OFF

OFF

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

Fan Only

ON/OFF

ON

OFF

OFF

OFF

OFF

ON/OFF

ON

OFF

OFF

OFF

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

Cooling 1st Stage

ON

ON

ON

OFF

OFF

OFF

ON

ON

ON

OFF

OFF

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

Cooling 2nd Stage

ON

ON

ON

ON

OFF

OFF

ON

ON

ON

ON

OFF

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

Cooling & Dehumidistat1

ON

ON

ON

ON/OFF

OFF

ON

ON

ON

ON

ON/OFF

OFF

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

Dehumidistat Only

ON/OFF

OFF

OFF

OFF

OFF

ON

ON

ON

ON

ON

OFF

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

Heating 1st Stage

OFF

ON

ON

OFF

OFF

OFF

OFF

ON

ON

OFF

OFF

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

Heating 2nd Stage

OFF

ON

ON

ON

OFF

OFF

OFF

ON

ON

ON

OFF

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

Heating 3rd Stage

OFF

ON

ON

ON

ON

OFF

OFF

ON

ON

ON

ON

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

1Cooling input takes priority over dehumidification input.

3Above inputs assume DIP 1.3 is in the heat pump position, and DIP 1.4 is in the O position. When 1.3 is in the heat/cool position, Y1 & Y2 are used for cooling inputs; W and O are used for heating inputs. When 1.4 is in the B position, the O column would be opposite logic.

4N/A for single stage units; Full load operation for dual capacity units.

5ON/OFF = Either ON or OFF; H/C = Either Heating or Cooling.

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Heat Controller DXM2 manual Thermostat Inputs With Resulting Demands

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.