HEAT CONTROLLER, INC.
R e s i d e n t i a l S p l i t - 6 0 H z R 4 1 0 A
R e v. : 0 3 A u g u s t , 2 0 1 2
DXM2 Controls
DXM2 Control
DXM2 is the next generation in controls is capable of
For most residential applications, configuration, monitoring and diagnostics can be done from the thermostat / service tool and there’s no need to read LEDs and change DIP switches.
For details on user settings, refer to User Manual (part #:
For details on Installer settings (not to be used by consumers), refer to Installer manual (part #:
For details on installer/service settings on the configuration/ diagnostic tool, refer to operation manual (part #:
DXM2 Control Start-up Operation
The control will not operate until all inputs and safety controls are checked for normal conditions. The compressor will have a 5 minute
the compressor relay will be energized. On all subsequent compressor calls, the random start delay is omitted.
Test Mode button:
Test mode allows the service technician to check the operation of the control in a timely manner. By momentarily pressing the TEST pushbutton, the DXM2 control enters a 20 minute test mode period in which all time delays are sped up 15 times.
Figure 26: Test Mode Button
For further details on the DXM2 control, refer to the DXM2 Application, Operation and Maintenace Manual and it is shipped with the unit)
Thermostat compatibility
It is strongly recommended that GeoMax2 communicating
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| P4 | (240Vac) | ||
Gnd | B- | A+ | 24V |
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| N.O. | N.C. |
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| P5 |
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| Com | N.O. |
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| Fan Enable | Fan Speed |
thermostat be used with DXM2 control, to ensure easy configuration, monitoring and diagnostics, in PLAIN English, on the thermostat. For example, Airflow can NOT be configured without a communicating thermostat or Configuration/ Diagnostic tool for use with GeoMax2.
Field Configuration Options - Note: In the following field configuration options, jumper wires should be clipped ONLY when power is removed from the DXM2 control.
Pust test button to enter Test Mode and
Table 8: Unit Operation
Test | P12 |
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P8
12V
IN
OUT |
Gnd |
NC |
Water coil low temperature limit setting: Jumper 3 (JW3- LT1 Low Temp) provides field selection of temperature limit setting for LT1 of 30°F or 10°F
Not Clipped = 30°F [-1°C]. Clipped = 10°F [-12°C].
Set
DIP Switches - For residential applications, all configuration can be performed in PLAIN ENGLISH on the thermostat. No DIP switch changes are required and no LEDs to be observed.
CAUTION!
CAUTION! Do not restart units without inspection and remedy of faulting condition. Equipment damage may occur.
Conventional | Unit | |
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ECM fan | ||
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G | Fan only | |
G, Y1 | Stage 1 heating1 | |
G, Y1, Y2 | Stage 2 heating1 | |
G, Y1, Y2, W | Stage 3 heating1 | |
G, W | Emergency heat | |
G, Y1, O | Stage 1 cooling2 | |
G, Y1, Y2, O | Stage 2 cooling2 |
1Stage 1 = 1st stage compressor, 1st stage fan operation Stage 2 = 2nd stage compressor, 2nd stage fan operation Stage 3 = 2nd stage compressor, auxiliary electric heat, 3rd stage fan operation
2Stage 1 = 1st stage compressor, 1st stage fan operation, reversing valve
Stage 2 = 2nd stage compressor, 2nd stage fan operation, reversing valve
26 | Heat Controller, Inc. |