Honeywell Home TF243 Series User manual

User Manual
TF243 Series Digital Thermostat
Thermostat Appearance Operating Your Thermostat
Power On/Off
Time-off
Press to switch on/off
thermostat. When in off mode,
OFF icon and indoor
temperature will display.
Press could set the
automatical turn off time when
the thermostat is working.
Press and hold for more
than 3s. After timer icon flashes,
press or to set turn off
time, then press button to
exit.
Operating Mode
Heating Cooling Ventilation
LCD Display
Setup Index
Test Index
Turn off time
Time-off Energy
Saving Mode
Keypad
Lockout
Freeze
Protection
Installation
Test
Installation
Setup
Temperature
Display
Trouble Shooting Tips
Installation Guide
Must be installed by a trained and experienced installer
Read instruction carefully. Failure to follow instruction will damage the
product or cause a hazardous condition.
Check the ratings in this booklet to verify that this product is suitable for
your application.
Always test for proper operation after installation.
Caution: ELECTRICAL HAZARD can cause electrical shock or equipment damage.
Disconnect power before installation, reparation and detachment.
The manual interpretation is owned by Honeywell Home Co.,Ltd, we retain the rights
that improve the products described in this manual without prior notice.
Installation Tips
TF243 Series is designed for standard 75x75x50mm wall mounting box installation.
Install the thermostat about 5 feet (1.5m) above the floor in an area with good
air circulation at average temperature.
Wiring and Installation
The screw must be locked tightly to avoid wire break off from the terminal.
The wire should not be tangled and stucked between front case assembly
and back case.
1 2
Quick Start Guide
Temperature
Setting
In or mode, press
or to set the target room
temperature.
Fan Speed
Auto Low Medium High
Speed Speed Speed
System Off Operating Mode
Setpoint
Index
Fan Speed
3
NO NO
NO
Do not install in locations where the thermostat can be affected by:
Dead spots behind doors and in corners
Hot or cold air from ducts
Sunlight or radiant heat from appliances
Concealed pipes or chimneys
The temperature of mounting box and wall should be in the operating temperature
range.
4
If.... Then....
Doesn’t work
Set the mode to (heating mode) by press
Make sure the temperature is set above the room
temperature
Wait 5 minutes for the system to respond
Doesn’t work
Set the mode to (cooling mode) by press
Make sure the temperature is set below the room
temperature
Wait 5 minutes for the system to respond
Doesn’t work
Make sure keypad is unlocked
Check that the thermostat is on
Doesn’t work
Make sure keypad is unlocked
Make sure the system isn’t in mode
Check that the thermostat is on
The system turns
off automatically
Make sure the memorized time off value isn’t
set to “0”
Time-off doesn’t
work
Make sure the button is unlocked
Make sure the turn off time is not 0
Make sure the thermostat is not in ISU
Make sure the thermostat is not off

User Manual
TF243 Series Digital Thermostat
Thermostat Appearance Operating Your Thermostat
Power On/Off
Time-off
Press to switch on/off
thermostat. When in off mode,
OFF icon and indoor
temperature will display.
Press could set the
automatical turn off time when
the thermostat is working.
Press and hold for more
than 3s. After timer icon flashes,
press or to set turn off
time, then press button to
exit.
Operating Mode
Heating Cooling Ventilation
LCD Display
Setup Index
Test Index
Turn off time
Time-off Energy
Saving Mode
Keypad
Lockout
Freeze
Protection
Installation
Test
Installation
Setup
Temperature
Display
Trouble Shooting Tips
Installation Guide
Must be installed by a trained and experienced installer
Read instruction carefully. Failure to follow instruction will damage the
product or cause a hazardous condition.
Check the ratings in this booklet to verify that this product is suitable for
your application.
Always test for proper operation after installation.
Caution: ELECTRICAL HAZARD can cause electrical shock or equipment damage.
Disconnect power before installation, reparation and detachment.
The manual interpretation is owned by Honeywell Home Co.,Ltd, we retain the rights
that improve the products described in this manual without prior notice.
Installation Tips
TF243 Series is designed for standard 75x75x50mm wall mounting box installation.
Install the thermostat about 5 feet (1.5m) above the floor in an area with good
air circulation at average temperature.
Wiring and Installation
The screw must be locked tightly to avoid wire break off from the terminal.
The wire should not be tangled and stucked between front case assembly
and back case.
1 2
Quick Start Guide
Temperature
Setting
In or mode, press
or to set the target room
temperature.
Fan Speed
Auto Low Medium High
Speed Speed Speed
System Off Operating Mode
Setpoint
Index
Fan Speed
3
NO NO
NO
Do not install in locations where the thermostat can be affected by:
Dead spots behind doors and in corners
Hot or cold air from ducts
Sunlight or radiant heat from appliances
Concealed pipes or chimneys
The temperature of mounting box and wall should be in the operating temperature
range.
4
If.... Then....
Doesn’t work
Set the mode to (heating mode) by press
Make sure the temperature is set above the room
temperature
Wait 5 minutes for the system to respond
Doesn’t work
Set the mode to (cooling mode) by press
Make sure the temperature is set below the room
temperature
Wait 5 minutes for the system to respond
Doesn’t work
Make sure keypad is unlocked
Check that the thermostat is on
Doesn’t work
Make sure keypad is unlocked
Make sure the system isn’t in mode
Check that the thermostat is on
The system turns
off automatically
Make sure the memorized time off value isn’t
set to “0”
Time-off doesn’t
work
Make sure the button is unlocked
Make sure the turn off time is not 0
Make sure the thermostat is not in ISU
Make sure the thermostat is not off

User Manual
TF243 Series Digital Thermostat
Thermostat Appearance Operating Your Thermostat
Power On/Off
Time-off
Press to switch on/off
thermostat. When in off mode,
OFF icon and indoor
temperature will display.
Press could set the
automatical turn off time when
the thermostat is working.
Press and hold for more
than 3s. After timer icon flashes,
press or to set turn off
time, then press button to
exit.
Operating Mode
Heating Cooling Ventilation
LCD Display
Setup Index
Test Index
Turn off time
Time-off Energy
Saving Mode
Keypad
Lockout
Freeze
Protection
Installation
Test
Installation
Setup
Temperature
Display
Trouble Shooting Tips
Installation Guide
Must be installed by a trained and experienced installer
Read instruction carefully. Failure to follow instruction will damage the
product or cause a hazardous condition.
Check the ratings in this booklet to verify that this product is suitable for
your application.
Always test for proper operation after installation.
Caution: ELECTRICAL HAZARD can cause electrical shock or equipment damage.
Disconnect power before installation, reparation and detachment.
The manual interpretation is owned by Honeywell Home Co.,Ltd, we retain the rights
that improve the products described in this manual without prior notice.
Installation Tips
TF243 Series is designed for standard 75x75x50mm wall mounting box installation.
Install the thermostat about 5 feet (1.5m) above the floor in an area with good
air circulation at average temperature.
Wiring and Installation
The screw must be locked tightly to avoid wire break off from the terminal.
The wire should not be tangled and stucked between front case assembly
and back case.
1 2
Quick Start Guide
Temperature
Setting
In or mode, press
or to set the target room
temperature.
Fan Speed
Auto Low Medium High
Speed Speed Speed
System Off Operating Mode
Setpoint
Index
Fan Speed
3
NO NO
NO
Do not install in locations where the thermostat can be affected by:
Dead spots behind doors and in corners
Hot or cold air from ducts
Sunlight or radiant heat from appliances
Concealed pipes or chimneys
The temperature of mounting box and wall should be in the operating temperature
range.
4
If.... Then....
Doesn’t work
Set the mode to (heating mode) by press
Make sure the temperature is set above the room
temperature
Wait 5 minutes for the system to respond
Doesn’t work
Set the mode to (cooling mode) by press
Make sure the temperature is set below the room
temperature
Wait 5 minutes for the system to respond
Doesn’t work
Make sure keypad is unlocked
Check that the thermostat is on
Doesn’t work
Make sure keypad is unlocked
Make sure the system isn’t in mode
Check that the thermostat is on
The system turns
off automatically
Make sure the memorized time off value isn’t
set to “0”
Time-off doesn’t
work
Make sure the button is unlocked
Make sure the turn off time is not 0
Make sure the thermostat is not in ISU
Make sure the thermostat is not off

User Manual
TF243 Series Digital Thermostat
Thermostat Appearance Operating Your Thermostat
Power On/Off
Time-off
Press to switch on/off
thermostat. When in off mode,
OFF icon and indoor
temperature will display.
Press could set the
automatical turn off time when
the thermostat is working.
Press and hold for more
than 3s. After timer icon flashes,
press or to set turn off
time, then press button to
exit.
Operating Mode
Heating Cooling Ventilation
LCD Display
Setup Index
Test Index
Turn off time
Time-off Energy
Saving Mode
Keypad
Lockout
Freeze
Protection
Installation
Test
Installation
Setup
Temperature
Display
Trouble Shooting Tips
Installation Guide
Must be installed by a trained and experienced installer
Read instruction carefully. Failure to follow instruction will damage the
product or cause a hazardous condition.
Check the ratings in this booklet to verify that this product is suitable for
your application.
Always test for proper operation after installation.
Caution: ELECTRICAL HAZARD can cause electrical shock or equipment damage.
Disconnect power before installation, reparation and detachment.
The manual interpretation is owned by Honeywell Home Co.,Ltd, we retain the rights
that improve the products described in this manual without prior notice.
Installation Tips
TF243 Series is designed for standard 75x75x50mm wall mounting box installation.
Install the thermostat about 5 feet (1.5m) above the floor in an area with good
air circulation at average temperature.
Wiring and Installation
The screw must be locked tightly to avoid wire break off from the terminal.
The wire should not be tangled and stucked between front case assembly
and back case.
1 2
Quick Start Guide
Temperature
Setting
In or mode, press
or to set the target room
temperature.
Fan Speed
Auto Low Medium High
Speed Speed Speed
System Off Operating Mode
Setpoint
Index
Fan Speed
3
NO NO
NO
Do not install in locations where the thermostat can be affected by:
Dead spots behind doors and in corners
Hot or cold air from ducts
Sunlight or radiant heat from appliances
Concealed pipes or chimneys
The temperature of mounting box and wall should be in the operating temperature
range.
4
If.... Then....
Doesn’t work
Set the mode to (heating mode) by press
Make sure the temperature is set above the room
temperature
Wait 5 minutes for the system to respond
Doesn’t work
Set the mode to (cooling mode) by press
Make sure the temperature is set below the room
temperature
Wait 5 minutes for the system to respond
Doesn’t work
Make sure keypad is unlocked
Check that the thermostat is on
Doesn’t work
Make sure keypad is unlocked
Make sure the system isn’t in mode
Check that the thermostat is on
The system turns
off automatically
Make sure the memorized time off value isn’t
set to “0”
Time-off doesn’t
work
Make sure the button is unlocked
Make sure the turn off time is not 0
Make sure the thermostat is not in ISU
Make sure the thermostat is not off

User Manual
TF243 Series Digital Thermostat
Thermostat Appearance Operating Your Thermostat
Power On/Off
Time-off
Press to switch on/off
thermostat. When in off mode,
OFF icon and indoor
temperature will display.
Press could set the
automatical turn off time when
the thermostat is working.
Press and hold for more
than 3s. After timer icon flashes,
press or to set turn off
time, then press button to
exit.
Operating Mode
Heating Cooling Ventilation
LCD Display
Setup Index
Test Index
Turn off time
Time-off Energy
Saving Mode
Keypad
Lockout
Freeze
Protection
Installation
Test
Installation
Setup
Temperature
Display
Trouble Shooting Tips
Installation Guide
Must be installed by a trained and experienced installer
Read instruction carefully. Failure to follow instruction will damage the
product or cause a hazardous condition.
Check the ratings in this booklet to verify that this product is suitable for
your application.
Always test for proper operation after installation.
Caution: ELECTRICAL HAZARD can cause electrical shock or equipment damage.
Disconnect power before installation, reparation and detachment.
The manual interpretation is owned by Honeywell Home Co.,Ltd, we retain the rights
that improve the products described in this manual without prior notice.
Installation Tips
TF243 Series is designed for standard 75x75x50mm wall mounting box installation.
Install the thermostat about 5 feet (1.5m) above the floor in an area with good
air circulation at average temperature.
Wiring and Installation
The screw must be locked tightly to avoid wire break off from the terminal.
The wire should not be tangled and stucked between front case assembly
and back case.
1 2
Quick Start Guide
Temperature
Setting
In or mode, press
or to set the target room
temperature.
Fan Speed
Auto Low Medium High
Speed Speed Speed
System Off Operating Mode
Setpoint
Index
Fan Speed
3
NO NO
NO
Do not install in locations where the thermostat can be affected by:
Dead spots behind doors and in corners
Hot or cold air from ducts
Sunlight or radiant heat from appliances
Concealed pipes or chimneys
The temperature of mounting box and wall should be in the operating temperature
range.
4
If.... Then....
Doesn’t work
Set the mode to (heating mode) by press
Make sure the temperature is set above the room
temperature
Wait 5 minutes for the system to respond
Doesn’t work
Set the mode to (cooling mode) by press
Make sure the temperature is set below the room
temperature
Wait 5 minutes for the system to respond
Doesn’t work
Make sure keypad is unlocked
Check that the thermostat is on
Doesn’t work
Make sure keypad is unlocked
Make sure the system isn’t in mode
Check that the thermostat is on
The system turns
off automatically
Make sure the memorized time off value isn’t
set to “0”
Time-off doesn’t
work
Make sure the button is unlocked
Make sure the turn off time is not 0
Make sure the thermostat is not in ISU
Make sure the thermostat is not off

User Manual
TF243 Series Digital Thermostat
Thermostat Appearance Operating Your Thermostat
Power On/Off
Time-off
Press to switch on/off
thermostat. When in off mode,
OFF icon and indoor
temperature will display.
Press could set the
automatical turn off time when
the thermostat is working.
Press and hold for more
than 3s. After timer icon flashes,
press or to set turn off
time, then press button to
exit.
Operating Mode
Heating Cooling Ventilation
LCD Display
Setup Index
Test Index
Turn off time
Time-off Energy
Saving Mode
Keypad
Lockout
Freeze
Protection
Installation
Test
Installation
Setup
Temperature
Display
Trouble Shooting Tips
Installation Guide
Must be installed by a trained and experienced installer
Read instruction carefully. Failure to follow instruction will damage the
product or cause a hazardous condition.
Check the ratings in this booklet to verify that this product is suitable for
your application.
Always test for proper operation after installation.
Caution: ELECTRICAL HAZARD can cause electrical shock or equipment damage.
Disconnect power before installation, reparation and detachment.
The manual interpretation is owned by Honeywell Home Co.,Ltd, we retain the rights
that improve the products described in this manual without prior notice.
Installation Tips
TF243 Series is designed for standard 75x75x50mm wall mounting box installation.
Install the thermostat about 5 feet (1.5m) above the floor in an area with good
air circulation at average temperature.
Wiring and Installation
The screw must be locked tightly to avoid wire break off from the terminal.
The wire should not be tangled and stucked between front case assembly
and back case.
1 2
Quick Start Guide
Temperature
Setting
In or mode, press
or to set the target room
temperature.
Fan Speed
Auto Low Medium High
Speed Speed Speed
System Off Operating Mode
Setpoint
Index
Fan Speed
3
NO NO
NO
Do not install in locations where the thermostat can be affected by:
Dead spots behind doors and in corners
Hot or cold air from ducts
Sunlight or radiant heat from appliances
Concealed pipes or chimneys
The temperature of mounting box and wall should be in the operating temperature
range.
4
If.... Then....
Doesn’t work
Set the mode to (heating mode) by press
Make sure the temperature is set above the room
temperature
Wait 5 minutes for the system to respond
Doesn’t work
Set the mode to (cooling mode) by press
Make sure the temperature is set below the room
temperature
Wait 5 minutes for the system to respond
Doesn’t work
Make sure keypad is unlocked
Check that the thermostat is on
Doesn’t work
Make sure keypad is unlocked
Make sure the system isn’t in mode
Check that the thermostat is on
The system turns
off automatically
Make sure the memorized time off value isn’t
set to “0”
Time-off doesn’t
work
Make sure the button is unlocked
Make sure the turn off time is not 0
Make sure the thermostat is not in ISU
Make sure the thermostat is not off

User Manual
TF243 Series Digital Thermostat
Thermostat Appearance Operating Your Thermostat
Power On/Off
Time-off
Press to switch on/off
thermostat. When in off mode,
OFF icon and indoor
temperature will display.
Press could set the
automatical turn off time when
the thermostat is working.
Press and hold for more
than 3s. After timer icon flashes,
press or to set turn off
time, then press button to
exit.
Operating Mode
Heating Cooling Ventilation
LCD Display
Setup Index
Test Index
Turn off time
Time-off Energy
Saving Mode
Keypad
Lockout
Freeze
Protection
Installation
Test
Installation
Setup
Temperature
Display
Trouble Shooting Tips
Installation Guide
Must be installed by a trained and experienced installer
Read instruction carefully. Failure to follow instruction will damage the
product or cause a hazardous condition.
Check the ratings in this booklet to verify that this product is suitable for
your application.
Always test for proper operation after installation.
Caution: ELECTRICAL HAZARD can cause electrical shock or equipment damage.
Disconnect power before installation, reparation and detachment.
The manual interpretation is owned by Honeywell Home Co.,Ltd, we retain the rights
that improve the products described in this manual without prior notice.
Installation Tips
TF243 Series is designed for standard 75x75x50mm wall mounting box installation.
Install the thermostat about 5 feet (1.5m) above the floor in an area with good
air circulation at average temperature.
Wiring and Installation
The screw must be locked tightly to avoid wire break off from the terminal.
The wire should not be tangled and stucked between front case assembly
and back case.
1 2
Quick Start Guide
Temperature
Setting
In or mode, press
or to set the target room
temperature.
Fan Speed
Auto Low Medium High
Speed Speed Speed
System Off Operating Mode
Setpoint
Index
Fan Speed
3
NO NO
NO
Do not install in locations where the thermostat can be affected by:
Dead spots behind doors and in corners
Hot or cold air from ducts
Sunlight or radiant heat from appliances
Concealed pipes or chimneys
The temperature of mounting box and wall should be in the operating temperature
range.
4
If.... Then....
Doesn’t work
Set the mode to (heating mode) by press
Make sure the temperature is set above the room
temperature
Wait 5 minutes for the system to respond
Doesn’t work
Set the mode to (cooling mode) by press
Make sure the temperature is set below the room
temperature
Wait 5 minutes for the system to respond
Doesn’t work
Make sure keypad is unlocked
Check that the thermostat is on
Doesn’t work
Make sure keypad is unlocked
Make sure the system isn’t in mode
Check that the thermostat is on
The system turns
off automatically
Make sure the memorized time off value isn’t
set to “0”
Time-off doesn’t
work
Make sure the button is unlocked
Make sure the turn off time is not 0
Make sure the thermostat is not in ISU
Make sure the thermostat is not off

Terminal
32322462-001
Two pipe application
Wiring Diagram
Valve type: Honeywell Home VC7931 Series
www.resideo.com
Ademco 1 GmbH
Hardhofweg 40
74821 Mosbach
Phone: [phone]
[e-mail]
homecomfort.resideo.com
@2020 Resideo Technologies, Inc. All rights
reserved. The Honeywell Home trademark is
used under license from Honeywell International
Inc. This product is manufactured by Resideo
Technologies, Inc and its affiliates.
R
C
VO
SC
RS
SC
RSB
F3
F2
F1
L
Fan
N
L
250VAC/6.3A
Hotel card
Remote sensor
Modulating valve
24VAC
Power supply
Terminal Designations
* Input rating: 24VAC(+10% , -10%) 50/60Hz
220/230VAC(+10% , -10%) 50/60Hz
* The vO terminal RL>600 ohms
Installation Setup
Warning
3s
Enter or Exit Installation Setup Mode
* The 24VAC power supply should meet Class2 SELV and less than
100VA
* A FUSE or BREAKER is necessary before L terminal.
ISU Code Description Possible Options
9
Temperature Display
Mode
0 Display room temperature (Default)
1 Display setpoint
10 Heating Range Stops 10-32 ºC Default 32 ºC
(50-90ºF Default 90 ºF)
11
Cooling Range Stops 10-32ºC Default 10 ºC
(50-90ºF
Default 50 ºF
)
12
Keypad Lockout
0 All keys are available (Default)
1 System button locked out
2 Fan and System buttons locked out
3 All buttons locked out except power
button
4 All buttons are locked
13
Remote Setback
Enable Method
0 Hotel card NO
1 Hotel card NC
2 Button (Default)
14 Remote Setback
Heating Setpoint
Range 10-21ºC Default : 18 ºC
(Range 50-70ºF Default : 64 ºF)
ISU Code Description Possible Options
15 Remote Setback
Cooling Setpoint
Range 22-32ºC Default : 26 ºC
(Range 72-90 ºF Default : 79 ºF)
16
Freeze Protection
0 Disabled
1 Enabled (Default)
17 Power Recovery
Status
0 OFF
1 Previous status (Default)
19
Fan Mode In
ES Mode
0 Run as Auto fan speed when
ISU_4=2 (Default)
1 Run as Low fan speed when ISU_4=2
Terminal Description
R 24VAC operating voltage
C Common GND
vO 0-10V Modulating signal output for valve
SC Ground for remote sensor/remote setback/valve
RS Remote sensor input
SC Ground for remote sensor/remote setback/valve
RSB Remote setback input
F3 High speed fan output
F2 Medium speed fan output
F1
Low speed fan output
L Live wire
ISU Code Description Possible Options
1
System Type
0 Heat only
1 Cool only
2 Two pipes heating/cooling (Default)
2
Remote Sensor
0 Onboard sensor (Default)
1 Remote sensor (NTC20K)
3
Temperature Scale
0 ºF
1 ºC (Default)
4
Fan Control Type
0 Auto only
Auto has fan ramping algorithm
1 Manual only
(3 speed: Low->Med->High-> Low)
2 User can choose Auto or Manual
(Default)
(Low->Med->High-> Auto-> Low)
8
Display Temperature
Adjustment
-2 ºC- 2 ºC, step 0.5 ºC, Default 0 ºC
(-4 ºF- 4 ºF, step 1 ºF, Default 0 ºF )

Terminal
32322462-001
Two pipe application
Wiring Diagram
Valve type: Honeywell Home VC7931 Series
www.resideo.com
Ademco 1 GmbH
Hardhofweg 40
74821 Mosbach
Phone: [phone]
[e-mail]
homecomfort.resideo.com
@2020 Resideo Technologies, Inc. All rights
reserved. The Honeywell Home trademark is
used under license from Honeywell International
Inc. This product is manufactured by Resideo
Technologies, Inc and its affiliates.
R
C
VO
SC
RS
SC
RSB
F3
F2
F1
L
Fan
N
L
250VAC/6.3A
Hotel card
Remote sensor
Modulating valve
24VAC
Power supply
Terminal Designations
* Input rating: 24VAC(+10% , -10%) 50/60Hz
220/230VAC(+10% , -10%) 50/60Hz
* The vO terminal RL>600 ohms
Installation Setup
Warning
3s
Enter or Exit Installation Setup Mode
* The 24VAC power supply should meet Class2 SELV and less than
100VA
* A FUSE or BREAKER is necessary before L terminal.
ISU Code Description Possible Options
9
Temperature Display
Mode
0 Display room temperature (Default)
1 Display setpoint
10 Heating Range Stops 10-32 ºC Default 32 ºC
(50-90ºF Default 90 ºF)
11
Cooling Range Stops 10-32ºC Default 10 ºC
(50-90ºF
Default 50 ºF
)
12
Keypad Lockout
0 All keys are available (Default)
1 System button locked out
2 Fan and System buttons locked out
3 All buttons locked out except power
button
4 All buttons are locked
13
Remote Setback
Enable Method
0 Hotel card NO
1 Hotel card NC
2 Button (Default)
14 Remote Setback
Heating Setpoint
Range 10-21ºC Default : 18 ºC
(Range 50-70ºF Default : 64 ºF)
ISU Code Description Possible Options
15 Remote Setback
Cooling Setpoint
Range 22-32ºC Default : 26 ºC
(Range 72-90 ºF Default : 79 ºF)
16
Freeze Protection
0 Disabled
1 Enabled (Default)
17 Power Recovery
Status
0 OFF
1 Previous status (Default)
19
Fan Mode In
ES Mode
0 Run as Auto fan speed when
ISU_4=2 (Default)
1 Run as Low fan speed when ISU_4=2
Terminal Description
R 24VAC operating voltage
C Common GND
vO 0-10V Modulating signal output for valve
SC Ground for remote sensor/remote setback/valve
RS Remote sensor input
SC Ground for remote sensor/remote setback/valve
RSB Remote setback input
F3 High speed fan output
F2 Medium speed fan output
F1
Low speed fan output
L Live wire
ISU Code Description Possible Options
1
System Type
0 Heat only
1 Cool only
2 Two pipes heating/cooling (Default)
2
Remote Sensor
0 Onboard sensor (Default)
1 Remote sensor (NTC20K)
3
Temperature Scale
0 ºF
1 ºC (Default)
4
Fan Control Type
0 Auto only
Auto has fan ramping algorithm
1 Manual only
(3 speed: Low->Med->High-> Low)
2 User can choose Auto or Manual
(Default)
(Low->Med->High-> Auto-> Low)
8
Display Temperature
Adjustment
-2 ºC- 2 ºC, step 0.5 ºC, Default 0 ºC
(-4 ºF- 4 ºF, step 1 ºF, Default 0 ºF )

Terminal
32322462-001
Two pipe application
Wiring Diagram
Valve type: Honeywell Home VC7931 Series
www.resideo.com
Ademco 1 GmbH
Hardhofweg 40
74821 Mosbach
Phone: [phone]
[e-mail]
homecomfort.resideo.com
@2020 Resideo Technologies, Inc. All rights
reserved. The Honeywell Home trademark is
used under license from Honeywell International
Inc. This product is manufactured by Resideo
Technologies, Inc and its affiliates.
R
C
VO
SC
RS
SC
RSB
F3
F2
F1
L
Fan
N
L
250VAC/6.3A
Hotel card
Remote sensor
Modulating valve
24VAC
Power supply
Terminal Designations
* Input rating: 24VAC(+10% , -10%) 50/60Hz
220/230VAC(+10% , -10%) 50/60Hz
* The vO terminal RL>600 ohms
Installation Setup
Warning
3s
Enter or Exit Installation Setup Mode
* The 24VAC power supply should meet Class2 SELV and less than
100VA
* A FUSE or BREAKER is necessary before L terminal.
ISU Code Description Possible Options
9
Temperature Display
Mode
0 Display room temperature (Default)
1 Display setpoint
10 Heating Range Stops 10-32 ºC Default 32 ºC
(50-90ºF Default 90 ºF)
11
Cooling Range Stops 10-32ºC Default 10 ºC
(50-90ºF
Default 50 ºF
)
12
Keypad Lockout
0 All keys are available (Default)
1 System button locked out
2 Fan and System buttons locked out
3 All buttons locked out except power
button
4 All buttons are locked
13
Remote Setback
Enable Method
0 Hotel card NO
1 Hotel card NC
2 Button (Default)
14 Remote Setback
Heating Setpoint
Range 10-21ºC Default : 18 ºC
(Range 50-70ºF Default : 64 ºF)
ISU Code Description Possible Options
15 Remote Setback
Cooling Setpoint
Range 22-32ºC Default : 26 ºC
(Range 72-90 ºF Default : 79 ºF)
16
Freeze Protection
0 Disabled
1 Enabled (Default)
17 Power Recovery
Status
0 OFF
1 Previous status (Default)
19
Fan Mode In
ES Mode
0 Run as Auto fan speed when
ISU_4=2 (Default)
1 Run as Low fan speed when ISU_4=2
Terminal Description
R 24VAC operating voltage
C Common GND
vO 0-10V Modulating signal output for valve
SC Ground for remote sensor/remote setback/valve
RS Remote sensor input
SC Ground for remote sensor/remote setback/valve
RSB Remote setback input
F3 High speed fan output
F2 Medium speed fan output
F1
Low speed fan output
L Live wire
ISU Code Description Possible Options
1
System Type
0 Heat only
1 Cool only
2 Two pipes heating/cooling (Default)
2
Remote Sensor
0 Onboard sensor (Default)
1 Remote sensor (NTC20K)
3
Temperature Scale
0 ºF
1 ºC (Default)
4
Fan Control Type
0 Auto only
Auto has fan ramping algorithm
1 Manual only
(3 speed: Low->Med->High-> Low)
2 User can choose Auto or Manual
(Default)
(Low->Med->High-> Auto-> Low)
8
Display Temperature
Adjustment
-2 ºC- 2 ºC, step 0.5 ºC, Default 0 ºC
(-4 ºF- 4 ºF, step 1 ºF, Default 0 ºF )