INSTALLATION MANUAL
7602-443 Communicating,
Programmable Thermostat
Heat Controller, Inc. • 1900 Wellworth Ave. • Jackson, MI 49203 • (517)787-2100 • www.heatcontroller.com
TABLE OF CONTENTS
Section Title Page
Safety/Installation Considerations 3
1.0 User Menu Settings 4
2.0 Installer Menu Settings 6
2.1 Installer Menu Settings Access 6
2.2 Thermostat Confi guration 6
3.0 System Confi guration 7
3.1 Airfl ow Selection 7
3.2 Option Selection 7
3.3 Unit Confi guration 8
3.4 Valve Confi guration 8
3.5 Multi-Unit Confi guration 9
4.0 Accessory Confi guration 10
4.1 Air Filter 10
4.2 Humidifi er 10
4.3 UV Lamp 10
4.4 Air Cleaner 10
5.0 Input Dealer Information 10
6.0 Humidity Confi guration 10
7.0 Temperature Algorithm 10
8.0 Demand Reduction Confi guration 1 1
9.0 Service Mode 11
9.1 Manual Operation 11
9.2 Control Diagnostics 12
9.3 Dipswitch Confi guration 12
9.4 Fault History 13
9.5 Clear Fault History 14
9.6 Multi-Unit Diagnostics 14
9.7 Multi-Unit Fault Information 14
10.0 Restore Defaults 14
11.0 Revision History 16
Heat Controller, Inc. 7602-443 COMMUNICATING, PROGRAMMABLE THERMOSTAT Installation Manual
The 7602-443 Communicating, Programmable Thermostat is
the perfect compliment to a Geothermal Heat Pump System
and represents a signifi cant advancement in thermostat
communicating technology. For homeowners, the 7602443 provides highly customizable climate control features
designed to maximize comfort and reduce the amount of
energy consumed by the Geothermal Heat Pump System.
For dealers, it represents a signifi cant advancement in con-
fi guration, monitoring and diagnostics from the thermostat.
Please read the following instructions carefully to maximize
the comfort and cost-saving potential of your Geothermal
Heat Pump System.
SAFETY CONSIDERATIONS
Improper wiring or installation may damage thermostat. Wiring must conform to local and national electrical codes
WARNING!
WARNING!
power to unit. There may be more than one power
disconnect. Electrical shock can cause personal
injury or death.
INSTALLATION CONSIDERATIONS
The thermostat requires no batteries. The thermostat is not a
power stealing device and MUST have both R and C terminals connected. See Diagram 1.
Before installing thermostat, turn off all
a time. Be careful not to allow wires to fall back
into the wall.
C. As each wire is disconnected, record wire color
and terminal marking.
D. Discard or recycle old thermostat.
NOTE: Mercury is a hazardous waste and MUST be disposed of properly.
3. Separate the thermostat from base.
4. Route thermostat wires through hole in base. Level
base against wall (for aesthetic value only - thermostat need not be leveled for proper operation) and
mark wall through 2 mounting holes.
5. Drill two 3/16-in. mounting holes in wall where
marked. (Note: Mounting holes on thermostat are
designed to fi t on a horizontal J-box).
6. Secure base to wall with 2 anchors and screws
provided making sure all wires extend through hole in
base.
7. Connect wires to proper terminal of the connector
block in the thermostat.
8. Push any excess wire back into wall. Excess wire
inside the thermostat case can interfere with proper
air fl ow across the temperature sensor. Seal hole in
wall to prevent air leaks. Leaks can affect operation.
9. Install thermostat on base.
10. Turn on power to the unit.
III. WIRING DIAGRAMS
All excess wire should be pushed back into the wall as far as
possible. Excess wire inside the thermostat plastic case may
interfere with the air fl ow across the temperature sensor.
Diagram 1: Thermostat Connections
INSTALLATION
I. THERMOSTAT LOCATION
Thermostat should be mounted:
• Approximately 5 ft. (1.5m) above fl oor .
• Close to or in a frequently used room, preferably on an
inside partitioning wall.
• On a section of wall without pipes or duct work.
Thermostat should NOT be mounted:
• Close to a window, on an outside wall, or next to a
door leading to the outside.
• Exposed to direct light and heat from a lamp, sun,
fi replace, or other temperature-radiating object which
may cause a false reading.
• Close to or in direct airfl ow from supply registers.
• In areas with poor air circulation, such as behind a
door or in an alcove.
II. THERMOSTAT INSTALLATION
1. Turn off all power to unit.
2. If an existing thermostat is being replaced:
A. Remove existing thermostat from wall.
B. Disconnect wires from existing thermostat, one at
ATC32U** Thermostat
7602-443
24Vac Common
24Vac Hot
Comm +
C
Comm -
R
Thermostat Connections
C 24V Common for Control Circuit
R 24V Supply for Control Circuit
A+ Communications (Positive)
B – Communications (Negative)
GND Ground
OD Outdoor Temperature Sensor
ID Indoor Temperature Sensor
3
A+
B-
OD
GND
ID
DXM2
Control
Gnd
A+
B-
24V
Outdoor
Sensor
(Optional)
Remote Indoor
Sensor
(Optional)
Installation Manual 7602-443 COMMUNICATING, PROGRAMMABLE THERMOSTAT Heat Controller, Inc.
1.0 User Menu Settings
1.1 OFFSETS
If you fi nd that the temperature displayed on the
thermostat does not accurately represent the room
temperature where the thermostat is located, this
offset function compensates for the difference.
The thermostat will apply an offset between what
temperature the thermostat is measuring versus the
temperature that is displayed.
1.1.1 TEMPERATURE OFFSET
The Temperature Offset function allows for
calibration of the temperature sensor.
Adjust the Temperature Offset settings using the
up/down arrow buttons. Press the center button to
save changes.
• Indoor Temperature (default 0°F): options:
-5°F to +5°F (in 1°F increments)
• Remote Temperature (default 0°F): options:
-5°F to +5°F (in 1°F increments)
• Outdoor Temperature (default 0°F): options:
-5°F to +5°F (in 1°F increments)
1.1.2 ANTICPATOR
If you fi nd that the thermostat is overshooting or
undershooting the temperature setpoint value, the
Anticipator setting allows for adjustment to correct
the temperature algorithm. When the Anticipator
value is set to a lower number, the thermostat
becomes more sensitive and when the Anticipator
value is raised, the thermostat becomes less
sensitive. If the thermostat is overshooting the
temperature setpoint, adjust the Anticipator
value up to reduce thermostat sensitivity. If the
thermostat is undershooting the temperature
setpoint, adjust the Anticipator value down to
increase thermostat sensitivity.
Adjust the Anticipator setting using the up/down
arrow buttons. Press the center button to save
changes.
• Anticipator (default 3): valid range: 1 to 9
1.1.3 DIFFERENTIAL
The Differential adjustment will vary the number of
degrees from the setpoint before a call for heating
or cooling is made. Use this function if you fi nd
that the thermostat is starting a call too soon/late
or staging equipment up/down too quickly/slowly.
For example, with a 1 ˚F 1st stage differential and
a heating setpoint of 70˚F, your thermostat will not
call for heating until the temperature is 69˚F.
Adjust the Differential setting using the up/down
arrow buttons. Navigate between Differentials
using the left/right arrow buttons. Press the center
button to save changes.
• 1st Stage (default 1°F): options: 1°F to 4°F
(in 1°F increments)
• 2nd Stage (default 1°F): options: 1°F to 4°F
(in 1°F increments)
• Aux Heat (default 1°F): options: 1°F to 4°F
(in 1°F increments)
NOTE 1: The thermostat must be confi gured for
Multistage by installer to access the 2nd Stage
Differential setting. The thermostat must be
confi gured for Auxiliary Heat by installer to access
the Auxiliary Heat Differential setting.
NOTE 2: The temperature control algorithm must
be confi gured for Differential control to access the
Differential settings by installer.
1.1.4 HUMIDITY OFFSET
If you fi nd that the Humidity level displayed on
the thermostat does not accurately represent the
Humidity level of the room in which the thermostat
is located, use the Humidity Offset function to
calibrate the humidity sensor.
Adjust the Humidity Offset setting using the up/
down arrow buttons. Press the center button to
save changes.
• Indoor Humidity (default 0%): options:
-10% to +10% (in 1% increments)
1.2 CYCLES PER HOUR
The thermostat allows the user to adjust the maximum
number of on/off cycles per hour to maintain the
desired indoor temperature.
Adjust the Cycles per Hour setting using the up/
down arrow buttons. Press the center button to save
changes.
• 4 (default): operation will start no sooner than 15
minutes after the previous call was initiated
• 6: operation will start no sooner than 10 minutes
after the previous call was initiated (can provide
tighter temperature control)
1.3 AUTO CHANGEOVER TIME
When the thermostat is confi gured for AUTO mode,
the thermostat automatically selects heating or
cooling mode depending on the indoor temperature.
The Auto Changeover Time is the amount of time that
elapses before operation switches from heating to
cooling mode or from cooling to heating mode.
Adjust the Auto Changeover Time using the up/
down arrow buttons. Press the center button to save
changes.
• Auto Change Over Time (default 15 minutes):
options: 0 to 120 minutes (in 15 minute
increments)
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Heat Controller, Inc. 7602-443 COMMUNICATING, PROGRAMMABLE THERMOSTAT Installation Manual
1.4 DEMO MODE
Demo mode is designed to showcase heat pump
operation when the unit is connected to an above
ground water loop with the supply air being blown
directly over the water loop.
1.4.1 ENTER DEMO MODE
To enter Demo Mode, navigate to the Service
Information screen (Menu>Settings>Service
Information) then press and hold the right arrow for
5 seconds
SERVICE INFORMATION
FAULT STATUS
TEMPERATURE STATUS
CLEAR FAULT HISTORY
SYSTEM STATUS
SELECT OPTION
PREVIOUS
1.4.2 DEMO MODE OPERATION
Control Demo Mode operation parameters from the
Demo Operation screen shown below.
The starting mode (heating or cooling) depends
on the loop temperature at the time when Demo
Mode is entered. The unit will operate in heating or
cooling based upon the following algorithm.
Start in Cooling Mode Start in Heating Mode
90°F
70°F
50°F
Solid lines represent heating operation. Dashed lines represent
cooling operation.
1.4.3 EXITING DEMO MODE
To exit demo mode, remove power to the
thermostat.
DEMO OPERATION
OUTDOOR FAN AUTO
78% HEATING
RH 36% HUMID ON
72%
AUTO
SETPOINT
HEAT 70
COOL 74
RH TEMP MODE FAN MENU
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Installation Manual 7602-443 COMMUNICATING, PROGRAMMABLE THERMOSTAT Heat Controller, Inc.
2.0 Installer Menu Settings
2.1 INSTALLER MENU SETTINGS ACCESS
The Installer Settings can be accessed at any time from the
Main Operating screen by holding the up/down arrows simultaneously for 5 seconds while the thermostat is in OFF Mode.
Installer Menu Settings Overview
Thermostat Confi guration
System Confi guration
Airfl ow Selection
Option Selection
Unit Confi guration
Valve Confi guration
Accessory Confi guration
Air Filter
Humidifi er
UV Lamp
Air Cleaner
Input Dealer Information
Humidity Confi guration
T emperature Algorithm
Demand Reduction Confi guration
Service Mode
Manual Operation
Control Diagnostics
Dipswitch Confi guration
Fault History
Clear Fault History
Restore Defaults
2.2.1 STAGING
Adjust the staging option using the up/down arrow buttons.
Press the center button to save changes.
• Single Stage – for control of a single stage
compressor applications
• Multi-Stage (default) – for control of multi-
stage compressor applications
THERMOSTAT
CONFIGURATION
SINGLE STAGE
MULTI STAGE
SELECT OPTION
PREVIOUS SAVE
2.2.2 AUXILIARY HEAT
Adjust the Auxiliary Heat options using the up/down arrow
buttons. Press the center button to save changes.
• Electric (default) – for control of a system with
electric auxiliary heat
• Multi-Fuel – for control of a system with furnace
for auxiliary heat
• No Auxiliary Heat – for control of a system with no
auxiliary heat
THERMOSTAT
CONFIGURATION
ELECTRIC
MULTI FUEL
NO AUXILIARY HEAT
2.2 THERMOSTAT CONFIGURATION
Upon initial power up, the communicating thermostat will
prompt the installer for the thermostat confi guration settings.
INSTALLER SETTINGS
THERMOSTAT CONFIG
SYSTEM CONFIG
ACCESSORY CONFIG
INPUT DEALER INFO
HUMIDITY CONFIG
TEMPERATURE CONTROL
DEMAND REDUCTION CNFG
SERVICE MODE
RESTORY DEFAULTS
DXM2 1.0
ATC32U01 C 2.1
SELECT OPTION
PREVIOUS
SELECT OPTION
PREVIOUS SAVE
2.2.2.1 AUXILIARY HEAT CONFIGURATION
Select Electric Auxiliary Heat mode
• Auxiliary Heat to Supplement Pump
• Auxiliary Heat for Emergency Heat Only
THERMOSTAT
CONFIGURATION
AUXILIARY HEAT TO
SUPPLEMENT HEAT PUMP
AUXILIARY HEAT FOR
EMERGENCY HEAT ONLY
SELECT OPTION
PREVIOUS SAVE
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Heat Controller, Inc. 7602-443 COMMUNICATING, PROGRAMMABLE THERMOSTAT Installation Manual
2.2.3 PROGRAMMING
Adjust the Programming options using the up/down arrow
buttons. Press the center button to save changes.
• Programmable (default) – enables 7-day
programming
• Non-Programmable – disables 7-day programming
• Night Setback – enables night setback
programming
NOTE: When the thermostat is confi gured for non-
programmable mode, the Display Date and Time setting
defaults to NO.
THERMOSTAT
CONFIGURATION
PROGRAMMABLE
NON PROGRAMMABLE
NIGHT SETBACK
SELECT OPTION
PREVIOUS SAVE
3.0 System Confi guration
Use the System Confi guration option on the start-up screen
to adjust critical equipment settings.
The System Confi guration information will be automatically
obtained from each communicating control in the system.
Note 1: The Airfl ow Selection menu (section 3.1) will not be
present if the connected communicating control is confi gured
for No Blower.
Note 2: The Valve Confi guration menu (section 3.4) will
not be present if the connected communicating control is
confi gured for No Loop Confi guration (OTHER).
SYSTEM CONFIGURATION
AIRFLOW SELECTION
OPTION SELECTION
UNIT CONFIG HE024
PUMP CONFIGURATION
SELECT OPTION
PREVIOUS SAVE
3.1 AIRFLOW SELECTION
Adjust the airfl ow settings for each system operating mode
using the up/down arrow buttons. Press the center button to
select each item.
• Airfl ow Settings (defaults stored in control) -
valid range: obtained from control (in 25 CFM
increments)
• Blower Off Delay (default 60 seconds) – valid
range: 0 to 255 seconds (in 5 second increments)
NOTE 1: The Airfl ow Settings will only be present if the
connected communicating control is confi gured for ECM
blower.
NOTE 2: If multiple units are connected to one thermostat,
refer to section 3.5 for unit selection.
CFM
AIRFLOW SELECTION
HEAT STAGE 1 600
HEAT STAGE 2 750
AUXILIARY HEAT 850
EMERGENCY HEAT 850
COOL STAGE 1 525
COOL STAGE 2 700
COOL DEHUMID 1 425
COOL DEHUMID 2 550
CONTINUOUS FAN 350
HEAT OFF DELAY 60
COOL OFF DELAY 30
PREVIOUS NEXT
INSTALLER SETTINGS
THERMOSTAT CONFIG
SYSTEM CONFIG
ACCESSORY CONFIG
INPUT DEALER INFO
HUMIDITY CONFIG
TEMPERA TURE ALGORITHM
DEMAND REDUCTION CNFG
SERVICE MODE
RESTORY DEFAULTS
ATC32U01
SELECT OPTION
PREVIOUS
3.2 OPTION SELECTION
This option allows the confi guration of heat pump options to
be modifi ed.
Adjust the Option settings using the up/down arrow buttons.
Press the center button to select each item.
• Motorized Valve (defaults stored in control) –
valid range: Off, On
“On” delays compressor start until the valve is fully open.
NOTE: “Motorized V alve” used here refers to a two-position
motorized water valve, not to be confused with the modulating
motorized water valve found in the LOOP CONFIG.
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Installation Manual 7602-443 COMMUNICATING, PROGRAMMABLE THERMOSTAT Heat Controller, Inc.
• Compressor ASCD (Anti-Short Cycle Delay
(default stored in control) – valid range: 5 to 8
(in 1 minute increments)
NOTE 1: The Compressor Anti-Short Cycle Delay setting
provides equipment protection by forcing the compressor to
wait a few minutes before restarting.
NOTE 2: If multiple units are connected to one thermostat,
refer to section 3.5 for unit selection.
CAUTION!
CAUTION! This is a Commercial option only and does not
alter Residential unit operation.
OPTION SELECTION
MOTORIZED VALVE OFF
COMPRESSOR ASCD 5
3.4 VALVE CONFIGURATION
Confi gure temperature differentials at the thermostat for
Integrated Variable Speed Water Flow Control units with a
motorized modulating valve.
Adjust the Valve Confi guration settings using the up/down
arrow buttons. Press the center button to select each item.
• Heating Delta T (default stored in control) –
valid range: 4 to 12ºF (in 1ºF increments)
• Cooling Delta T (default stored in control) –
valid range: 9 to 20ºF (in 1ºF increments)
NOTE 1: Minimum and Maximum degree values are shown
only when the control is confi gured with the appropriate
values.
NOTE 2: Refer to section 3.6.3 for multi-unit confi guration
instructions.
MODULATING VALVE
CONFIGURATION
DEG
HEATING DELTA T 8
COOLING DELTA T 15
PREVIOUS NEXT
3.3 UNIT CONFIGURATION
Adjust the Unit Confi guration settings including Heat
Pump Family, Heat Pump Size, Blower Type, and Loop
Confi guration using the up/down arrow buttons. Press the
center button to select each item.
• Heat Pump Family (default stored in control) –
valid range: HTS, HE
• Heat Pump Size (default stored in control) –
valid range: depends on Heat Pump Family setting
• Blower Type (default stored in control) – valid
range: NONE, ECM
• Loop Confi g (default stored in control) – valid
range: Other, MOD VALVE
NOTE: Refer to section 3.5.3 for multi-unit confi guration
instructions.
UNIT CONFIGURATION
CURRENT CONFIG HE024
HEAT PUMP FAMILY HE
HEAT PUMP SIZE 024
BLOWER TYPE ECM
LOOP CONFIG OTHER
PREVIOUS NEXT
3.4.1 MODULATING VALVE OFF POSITION
Click Next from section 3.5 to select the off position
value for the modulating valve.
NOTE: For certain commercial multi-unit
applications, the modulating valve can be kept
slightly open by choosing values 3.3-4.0.
MODULATING VALVE
CONFIGURATION
OFF POSITION 3.8
PREVIOUS SELECT
SELECT OPTION
PREVIOUS SAVE
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Heat Controller, Inc. 7602-443 COMMUNICATING, PROGRAMMABLE THERMOSTAT Installation Manual
3.5 MULTI-UNIT CONFIGURATION
If multiple units are connected to one ATC thermostat upon
unit start-up, the thermostat will automatically register the
serial numbers of all units connected to it.
NOTE: Multiple units may be connected directly to the ATC
thermostat or connected to one another in series, as shown
by the fi gure below.
Or
3.5.2 MULTI-UNIT OPTION SELECTION
In section 3.2, when an installer selects “Option
Selection” from the System Confi guration menu,
the installer may choose the unit to confi gure
by the last 4 digits of its serial number from the
following screen.
OPTION SELECTION
HE024 S N - - - - - 1 2 3 4
HE024 S N - - - - - 5 6 7 8
HE036 S N - - - - - 9 0 1 2
PREVIOUS SELECT
3.5.3 Multi-Unit, Unit, & Valve Confi guration
To confi gure Unit and Valve options in sections 3.3-
3.4, the thermostat must be connected to only one
unit at a time.
Two
connections
on DXM2
board to allow
for multi-unit
installation
3.5.1 MULTI-UNIT AIRFLOW SELECTION
In section 3.1, when an installer selects “Airfl ow
Selection” from the System Confi guration menu,
the installer may choose the unit to confi gure
by the last 4 digits of its serial number from the
following screen.
AIRFLOW SELECTION
HE024 S N - - - - - 1 2 3 4
HE024 S N - - - - - 5 6 7 8
HE036 S N - - - - - 9 0 1 2
PREVIOUS SELECT
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Installation Manual 7602-443 COMMUNICATING, PROGRAMMABLE THERMOSTAT Heat Controller, Inc.
4.0 Accessory Confi guration
A service message will fl ash at the top of the Main screen
when a service timer expires to alert the user that it is time to
service these options. Refer to DXM2 AOM for instructions on
confi guring DIP switches to confi gure accessories. Follow the
instructions below to set service timers.
INSTALLER SETTINGS
THERMOSTAT CONFIG
SYSTEM CONFIG
ACCESSORY CONFIG
INPUT DEALER INFO
HUMIDITY CONFIG
TEMPERA TURE ALGORITHM
DEMAND REDUCTION CNFG
SERVICE MODE
RESTORY DEFAULTS
ATC32U01
SELECT OPTION
PREVIOUS
4.1 AIR FILTER
This feature displays an alert to remind the user to change
the air fi lter after the selected time has passed.
Adjust the Air Filter Reminder settings using the up/down
arrow buttons. Press the center button to save changes.
• Cumulative Run Time (default Off) – valid range:
Off, 400 to 3600 hours (in 100 hour increments)
• Calendar Time (default Off) – valid range: Off, 3
to 48 months (in 3 month increments)
4.2 HUMIDIFIER
This feature displays an alert to remind the user to change
the humidifi er pad after the selected time has passed.
Adjust the Humidifi er Reminder settings using the up/down
arrow buttons. Press the center button to save changes.
• Cumulative Run Time (default Off) – valid range:
Off, 400 to 3600 hours (in 100 hour increments)
• Calendar Time (default Off) – valid range: Off, 3
to 24 months (in 3 month increments)
Adjust the Air Cleaner Reminder settings using the up/down
arrow buttons. Press the center button to save changes.
• Cumulative Run Time (default Off) – valid range:
Off, 400 to 3600 hours (in 100 hour increments)
• Calendar Time (default Off) – valid range: Off, 3
to 24 months (in 3 month increments)
5.0 Input Dealer Information
Enter/edit the Dealer Information settings, including Brand
Name, Model Number, Serial Number, Contractor Name, and
Contractor Phone number, using the up/down arrow buttons.
Press the center button to save changes.
6.0 Humidity Confi guration
Confi gure humidity control settings (dehumidifi cation/
humidifi cation).
Adjust the Humidity Control settings using the up/down arrow
buttons. Press the center button to save changes.
• Dehumidifi cation – This logic will communicate
a Dehumidifi cation output when the humidity is
greater than the setpoint (acts as a dehumidistat).
The Dehumidifi cation output will not be
communicated when the humidity is below the
setpoint.
• Humidifi cation – This logic will communicate a
Humidifi cation output when the humidity is less
than the setpoint (acts as a humidistat). When the
Humidifi cation output is active, the fan output will
also be active. The Humidifi cation output will not
be communicated when the humidity is above the
setpoint.
• Both – Incorporates both Dehumidifi cation and
Humidifi cation logic.
• None (default) – Dehumidifi cation
and Humidifi cation outputs will not be
communicated.
7.0 Temperature Algorithm
4.3 UV LAMP
This feature displays an alert to remind the user to change
the UV lamps after the selected time has passed.
Adjust the UV Lamp Reminder settings using the up/down
arrow buttons. Press the center button to save changes.
• Cumulative Run Time (default Off) – valid range:
Off, 400 to 3600 hours (in 100 hour increments)
• Calendar Time (default Off) – valid range: Off, 3
to 48 months (in 3 month increments)
4.4 AIR CLEANER
This feature displays an alert to remind the user to clean the
fi lter(s) after the selected time has passed.
Confi gure the logic the thermostat uses to meet the
temperature setpoints.
• Proportional Integral (default) – This logic will
use a combination of temperature differential and
operating time to determine the appropriate heating
or cooling stages for operation (see NOTE 1).
• Proportional Integral (No Down Staging) – This
logic includes the Proportional Integral logic, but
in addition the logic keeps all active heating or
cooling stages energized until the demand is fully
satisfi ed (see NOTE 1).
• Differential – This logic will only use temperature
differential to determine the appropriate heating or
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Heat Controller, Inc. 7602-443 COMMUNICATING, PROGRAMMABLE THERMOSTAT Installation Manual
cooling stages for operation. This logic will keep
all active heating or cooling stages energized until
the demand is fully satisfi ed (see NOTE 2).
NOTE 1: The Proportional Integral options require fi rst stage
heating or cooling to be active for a minimum of 5 minutes,
before energizing second stage when confi gured for multi
stage operation.
NOTE 2: The Differential option will activate fi rst stage heating
or cooling when the temperature is more than the fi rst stage
differential value (User Manual section 5.6.2.3), below or
above the setpoint. Second stage heating or cooling will be
activated when the temperature is more than the fi rst and
second stage differential values combined (User Manual
section 5.6.2.3), below or above the setpoint. Third stage
heating will be activated when the temperature is more than
the fi rst, second, and third stage differential values combined
(User Manual section 5.6.2.3), below the setpoint.
8.0 Demand Reduction
Confi guration
Demand Reduction is activated by an input signal at the unit
control board to reduce the electric load while peak utility
rates are high. The Demand Reduction Confi guration mode
selects which of the available unit control inputs is to be
used as the activation signal. While a physical input signal is
present at the selected input, the thermostat will implement
load reduction by limiting operation or capacity. Refer to
section 5.6.9 in the User Manual for more details on Demand
Reduction.
9.0 Service Mode
SERVICE MODE
MANUAL OPERATION
CONTROL DIAGNOSTICS
DIPSWITCH CONFIG
FAULT HISTORY
CLEAR FAULT HISTORY
SELECT OPTION
PREVIOUS SELECT
9.1 MANUAL OPERATION
Manual Operation mode allows the service personnel to
manually command operation for any of the thermostat
outputs, blower speed or valve position to help troubleshoot
specifi c components.
NOTE 1: The ECM Airfl ow adjustment will not be present if the
connected communicating control (DXM2) is not confi gured for
ECM (section 3.3).
NOTE 2: The Valve Position adjustment will not be present if
the connected communicating control (DXM2) is confi gured for
V alve (section 3.1).
NOTE 3: If multiple units are connected to one thermostat,
refer to section 9.6
Adjust the Demand Reduction Confi guration setting using
the up/down arrow buttons. Press the center button to save
changes.
• No Demand Reduction (default) – Demand
Reduction operating mode will not be activated by
a DXM2 input.
• DXM2 Inputs – Assigns a DXM2 input to activate
Demand Reduction operating mode.
INSTALLER SETTINGS
THERMOSTAT CONFIG
SYSTEM CONFIG
ACCESSORY CONFIG
INPUT DEALER INFO
HUMIDITY CONFIG
TEMPERA TURE ALGORITHM
DEMAND REDUCTION CNFG
SERVICE MODE
RESTORY DEFAULTS
ATC32U01
SELECT OPTION
PREVIOUS
MANUAL OPERATING MODE
Y1 COMM OUTPUT OFF
Y2 COMM OUTPUT OFF
W COMM OUTPUT OFF
O COMM OUTPUT OFF
G COMM OUTPUT OFF
H COMM OUTPUT OFF
DH COMM OUTPUT OFF
ECM AIRFLOW 0
TEST MODE OFF
PUMP SPEED 0%
TEST MODE OFF
SELECT OPTION
PREVIOUS SELECT
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Installation Manual 7602-443 COMMUNICATING, PROGRAMMABLE THERMOSTAT Heat Controller, Inc.
9.2 CONTROL DIAGNOSTICS
Control Diagnostics mode allows the service personnel to
view the status of all physical inputs, switches, temperature
sensor readings, as well as the operational status of the
pump at the thermostat.
Navigate between diagnostic screens using the left/right
arrow buttons.
NOTE 1: If multiple units are connected to one thermostat,
refer to section 9.6.
CONTROL DIAGNOSTICS
HP SWITCH CL
LOC SWITCH CL
Y1 PHYSICAL INPUT ON
Y2 PHYSICAL INPUT OFF
W PHYSICAL INPUT OFF
O PHYSICAL INPUT ON
G PHYSICAL INPUT ON
H PHYSICAL INPUT OFF
EMERG SHUTDOWN OFF
NIGHT SETBACK OFF
OVR INPUT OFF
PREVIOUS NEXT
CONTROL STATUS
TEMPERATURES
LT1 TEMP 38.1
LT2 TEMP 79.9
COMP DISCHARGE 157.7
HOT WATER EWT 121.5
LEAVING AIR 75.1
LEAVING WATER 73.3
ENTERING WATER 78.5
CONTROL VOLTAGE 26.4
ECM BLOWER RPM 550
ECM TARGET CFM 800
ECM BLWR STATIC N/A
PREVIOUS NEXT
9.3 DIPSWITCH CONFIGURATION
Dipswitch Confi guration mode allows the service personnel
to view the status of all dipswitch settings for the connected
communicating control (DXM2/AXM) at the thermostat.
Navigate between confi guration screens using the left/right
arrow buttons.
NOTE 1: The unit control dipswitch settings cannot be
changed from the thermostat.
NOTE 2: If multiple units are connected to one thermostat,
refer to section 9.6.
CONTROL CONFIGURATION
DIPSWITCH S1
1 ON UPS ENABLED
2 ON DUAL COMP STG 1
3 ON HEAT PUMP TSTAT
4 ON RV O THERMOSTAT
5 ON DEHUMID OFF
6 ON EH2 AUX HEAT
7 ON BOILERLESS
8 ON SEE DXM2 AOM
PREVIOUS NEXT
CONTROL CONFIGURATION
DIPSWITCH S2
1 ON \ ACCESSORY 1
2 ON ACCESSORY 2
3 ON/
4 ON \ ACCESSORY 2
5 ON ACTIVE W/ COMP
6 ON /
7 ON H DEHUM INPUT
8 ON FACTORY SETTING
PREVIOUS NEXT
CONTROL CONFIGURATION
DIPSWITCH S3
1 ON FACTORY SETTING
2 OFF HWG TEST OFF
3 OFF HWG SP 125
4 OFF HWG DISABLED
JW3 LT1 SETTING WELL
PREVIOUS
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Heat Controller, Inc. 7602-443 COMMUNICATING, PROGRAMMABLE THERMOSTAT Installation Manual
9.4 FAULT HISTORY
Fault History mode displays the fi ve most recent stored fault
codes for the connected communicating control (DXM2).
Navigate between control fault codes using the up/down
arrow buttons. Press the center button to view more
information about the highlighted fault code.
NOTE: If multiple units are connected to one thermostat, refer
to section 9.7.
HE024 SN - - - - - 0 1 2 3
LAST 5 FAULTS
LT1 LOW WATER TEMP
NO FAULT
NO FAULT
NO FAULT
NO FAULT
NEXT
PREVIOUS SELECT
FAULT CONDITION MENU
LT1 LOW WATER TEMP
HEAT 1 11:11 AM 11/14
FAULT TEMP CONDITIONS
FAULT FLOW CONDITIONS
FAULT I/O CONDITIONS
FAULT CONFIG COND
FAULT POSSIBLE CAUSES
PREVIOUS SELECT
9.4.1 Temperature Conditions
Displays detailed temperature readings that were
recorded at the time the fault occurred.
NOTE: If multiple units are connected to one thermostat, refer
to section 9.6.
FAULT TEMPERATURE CONDITIONS
LT1 LOW WATER TEMP
HEAT 1 11:11 AM 11/14
LT1 TEMP 28.1
LT2 TEMP 97.3
HOT WATER EWT 121.5
COMP DISCHARGE 157.7
LEAVING AIR 92.7
LEAVING WATER 34.9
ENTERING WATER 42.1
CONTROL VOLTAGE 26.4
PREVIOUS
9.4.2 Flow Conditions
Displays detailed blower and valve position readings
that were recorded at the time the fault occurred.
NOTE: If multiple units are connected to one thermostat, refer
to section 9.7.
FAULT FLOW CONDITIONS
LT1 LOW WATER TEMP
HEAT 1 11:11 AM 11/14
ECM TARGET CFM 800
ECM BLOWER RPM 550
FLOW RATE GPM 6.5
PUMP SPEED 60%
VALVE POSITION 0%
PREVIOUS
9.4.3 Input/Output Conditions
Displays the status of all physical and communicated
inputs, switches, and control outputs that were
recorded at the time the fault occurred.
NOTE: If multiple units are connected to one thermostat, refer
to section 9.7.
FAULT I / O CONDITIONS
LT1 LOW WATER TEMP
HEAT 1 11:11 AM 11/14
TSTAT SAFETY OUTPT
CONV COMM HPS
Y1 Y1 LOC CC
Y2 Y2 CO RV
WW ACC1
O O OUTPT ACC2
G GFAN AL1
HH HWG EH1
OVR DH PUMP EH2
PREVIOUS
9.4.4 Confi guration Conditions
Displays the status of all dipswitch settings that were
recorded at the time the fault occurred.
NOTE: If multiple units are connected to one thermostat, refer
to section 9.7.
FAULT CONFG CONDITIONS
LT1 LOW WATER TEMP
HEAT 1 11:11 AM 11/14
S1 S2 S3
1 ON 1 ON 1 ON
2 ON 2 ON 2 OFF
3 ON 3 ON 3 OFF
4 ON 4 ON 4 OFF
5 ON 5 ON
6 ON 6 ON LT1 WELL
7 ON 7 ON LT2 WELL
8 ON 8 ON
PREVIOUS
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Installation Manual 7602-443 COMMUNICATING, PROGRAMMABLE THERMOSTAT Heat Controller, Inc.
9.4.5 Possible Causes
Possible causes as to why the fault occurred
NOTE: If multiple units are connected to one thermostat, refer
to section 9.7.
POSSIBLE FAULT CAUSES
LOW WATER COIL TEMP
LOW WATER TEMP - HTG
LOW WATER FLOW - HTG
LOW REFRIG CHARGE - HTG
INCORRECT LT1 SETTING
BAD LT1 THERMISTOR
PREVIOUS
9.5 CLEAR FAULT HISTORY
Clear Fault History will clear all fault codes stored in the
thermostat as well as the fault history in any connected
communicating controls (DXM2/AXM).
9.6 MULT-UNIT DIAGNOSTICS
If multiple units are connected to one thermostat when
Manual Operation, Control Diagnostics, or Dipstick
Confi guration is selected, the service personnel will see a
screen to select a specifi c unit by the last 4 digits of its serial
number.
NOTE: Multiple units may be connected directly to the 7602443 thermostat or connected to one another in series, as
shown by the fi gure below.
CONTROL DIAGNOSTICS
HE024 S N - - - - - 1 2 3 4
HE024 S N - - - - - 5 6 7 8
HE036 S N - - - - - 9 0 1 2
PREVIOUS SELECT
9.7 MULT-UNIT FAULT INFO
When multiple units are connected to one thermostat,
UNLIKE Mult-Unit Diagnostics, the service personnel views
each units’ fault information by selecting the next option.
HE036 S N - - - - - 0 1 2 3
LAST 5 FAULTS
LT1 LOW WATER TEMP
NO FAULT
NO FAULT
NO FAULT
NO FAULT
NEXT
PREVIOUS SELECT
10.0 Restore Defaults
Two
connections
on DXM2
board to allow
for multi-unit
installation
The thermostat will reset all settings, excluding the
thermostat confi guration settings (section 2), to their factory
defaults.
Or
14
Heat Controller, Inc. 7602-443 COMMUNICATING, PROGRAMMABLE THERMOSTAT Installation Manual
15
Revision History
Date Page # Description
17 Sept., 12 All First Published
9/17/12
*97B0055N09*
97B0055N09
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