Heat Controller HEV/H 사용자 설명서
30
Installation, Operation & Maintenance
HEV/H SERIES
Heat Controller, Inc.
DXM2 Control
DXM2 is the next generation in controls is capable of 2-way
communication between itself and smart components, like
the communicating thermostat, fan motor and confi guration/
diagnostic tool.
DXM2 is the next generation in controls is capable of 2-way
communication between itself and smart components, like
the communicating thermostat, fan motor and confi guration/
diagnostic tool.
For most residential applications, confi guration, monitoring
and diagnostics can be done from the thermostat / service
tool and there’s no need to read LEDs and change DIP
switches.
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 #:
consumers), refer to Installer manual (part #:
For details on installer/service settings on the confi guration/
diagnostic tool, refer to operation manual (part #:
diagnostic tool, refer to operation manual (part #:
For further details on the DXM2 control, refer to the DXM2
Application, Operation and Maintenance Manual and it is
shipped with the unit.
Application, Operation and Maintenance Manual and it is
shipped with the unit.
Thermostat compatibility
It is strongly recommended that GeoMax2 communicating
thermostat be used with DXM2 control, to ensure easy
confi guration, monitoring and diagnostics, in PLAIN
English, on the thermostat. For example, Airfl ow can NOT
be confi gured without a communicating thermostat or
Confi guration/ Diagnostic tool for use with GeoMax2.
It is strongly recommended that GeoMax2 communicating
thermostat be used with DXM2 control, to ensure easy
confi guration, monitoring and diagnostics, in PLAIN
English, on the thermostat. For example, Airfl ow can NOT
be confi gured without a communicating thermostat or
Confi guration/ Diagnostic tool for use with GeoMax2.
Field Confi guration Options - Note: In the following fi eld
confi guration options, jumper wires should be clipped ONLY
when power is removed from the DXM2 control.
confi guration options, jumper wires should be clipped ONLY
when power is removed from the DXM2 control.
Water coil low temperature limit setting: Jumper 3 (JW3-
LT1 Low Temp) provides fi eld selection of temperature limit
setting for LT1 of 30°F or 10°F [-1°F or -12°C] (refrigerant
temperature).
LT1 Low Temp) provides fi eld selection of temperature limit
setting for LT1 of 30°F or 10°F [-1°F or -12°C] (refrigerant
temperature).
Not Clipped = 30°F [-1°C]. Clipped = 10°F [-12°C].
A0-2: Confi gure Modulating Valve (fi eld installed
accessory)
accessory)
Set A0-2 jumper to “IOV” if using Modulating Motorized
Valve as fi eld installed accessory
Valve as fi eld installed accessory
DIP Switches – There’s no need to change the DIP switches
on Residential units. All DIP switches in S1 and S2 should
be “on”. In S3, S3-1 should be “on” and the rest should be
“off”. For more details on DIP switches, refer to the DXM2
AOM.
on Residential units. All DIP switches in S1 and S2 should
be “on”. In S3, S3-1 should be “on” and the rest should be
“off”. For more details on DIP switches, refer to the DXM2
AOM.
DXM2 CONTROLS
CAUTION!
CAUTION! Do not restart units without inspection and
remedy of faulting condition. Equipment damage may occur.
remedy of faulting condition. Equipment damage may occur.
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.
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.
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 anti-short cycle delay at power-up. The fi rst
time after power-up that there is a call for compressor, the
compressor will follow a 5 to 80 second random start delay.
After the random start delay and anti-short cycle delay,
the compressor relay will be energized. On all subsequent
compressor calls, the random start delay is omitted.
The control will not operate until all inputs and safety controls
are checked for normal conditions. The compressor will
have a 5 minute anti-short cycle delay at power-up. The fi rst
time after power-up that there is a call for compressor, the
compressor will follow a 5 to 80 second random start delay.
After the random start delay and anti-short cycle delay,
the compressor relay will be energized. On all subsequent
compressor calls, the random start delay is omitted.
Figure 25: Test Mode Button
(240Vac)
Com
N.O.
Fan Enable
Test
P5
B-
Gnd
P4
A+ 24V
(240Vac)
Fan Speed
N.O.
N.C.
12V
OUT
Gnd
Gnd
P8
IN
NC
P12
Push test button to
enter Test Mode and
speed-up timing and
delays for 20 minutes.
Table 7c: Unit Operation
Conventional
T-stat signal
(Non-Communicating)
Unit
ECM fan
G
Fan only
G, Y1
Stage 1 heating
1
G, Y1, Y2
Stage 2 heating
1
G, Y1, Y2, W
Stage 3 heating
1
G, W
Emergency heat
G, Y1, O
Stage 1 cooling
2
G, Y1, Y2, O
Stage 2 cooling
2
1 Stage 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
2 Stage 1 = 1st stage compressor, 1st stage fan operation,
reversing
reversing
valve
Stage 2 = 2nd stage compressor, 2nd stage fan operation,
reversing
valve